Name: 1N6130
Brand: Semtech Corporation
SKU: 1N6130
Availability: InStock
Rating: 5 (103 reviews)

1N6130

Pour Référence Seulement

Référence	1N6130
Fabricant	Semtech Corporation
Description	T MET BI 500W 76.0V
Fiche technique
paquet	-
ECAD
En stock	3 708 piece(s)
Prix unitaire	Request a Quote
Délai de mise en œuvre	VÊtre confirmé
Temps de livraison estimé	juin 8 - juin 13 (Choisissez l'expédition accélérée)
Demander un Devis

Méthodes de paiement
Services de livraison

Nous offrons 1N6130 pour prix compétitif sur le marché mondial, s'il vous plaît envoyez-nous une demande de quota pour les prix. Merci!
Pour traiter votre demande de devis, s'il vous plaît ajouter 1N6130 avec la quantité dans la nomenclature. Heisener.com Ne nécessite pas de toute inscription pour demander un devis de 1N6130.

Spécifications 1N6130

Fabricant	Semtech Corporation
Catégorie	Dispositifs contre les surtensions, les surintensités et la surchauffe - TVS - Diodes
paquet	-
ECAD
Séries	*
Type	-
Canaux Unidirectionnels	-
Canaux bidirectionnels	-
Tension - Standoff inversé (Typ)	-
Voltage - Breakdown (Min)	-
Tension - Bridage (Max) @ Ipp	-
Courant - impulsion maximale (10 / 1000µs)	-
Puissance - impulsion maximale	-
Protection de ligne électrique	-
Applications	-
Capacitance @ Fréquence	-
Température de fonctionnement	-
Type de montage	-
Paquet / cas	-
Package de périphérique fournisseur	-

1N6130 Packaging

1N6130 FAQ

1. How to order 1N6130 on Heisener?

Currently, Heisener only provide peer-to-peer order processing. While you submit the RFQ, our professional agent will contact you with the competitive prices in the global market, and our agent will prompt you to finish the order if you accept our offers.
2. How does Heisener guarantee that 1N6130 is from the original manufacturer or authorized agents?

We have a professional and experienced quality control team to strictly verify and test the 1N6130. All suppliers must pass our qualification reviews before they can publish their products including 1N6130 on Heisener; we pay more attention to the channels and quality of 1N6130 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
3. Are the 1N6130 price and inventory displayed accurate?

The price and inventory of 1N6130 fluctuates frequently and cannot be updated in time, it will be updated periodically within 24 hours. And, our quotation usually expires after 5 days.
4. What forms of payment are accepted?

Wire Transfer, PayPal, Alipay, Wechat, Credit Card, Western Union, MoneyGram, and Escrow are all acceptable.

Warm Tips: Some orders in certain payment forms may require handling fee.
5. How is the shipping arranged?

Customers can choose industry-leading freight companies, including DHL, UPS, FedEx, TNT, and Registered Mail. Shipping insurance is also available.

Once your order has been processed for shipment, our salesperson will send you an email advising you of the shipping status and tracking number.

Warm Tips: It may take up to 24 hours for the carriers to display tracking information. Usually, express delivery takes 3-5 days, and registered mail takes 25-60 days.
6. What is the process for return or replacement of 1N6130?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the 1N6130 we delivered, we will accept the replacement or return of the 1N6130 only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of 1N6130.

(3)The PartNo is unused and only in the original unpacked packaging.

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations
7.How to contact us to get technical supports, such as 1N6130 pin diagram, 1N6130 datasheet?

If you need any after-sales service, please do not hesitate to contact us.

1N6130 Produits Connexes

VJ0402D9R1DLAAJ	Vishay Vitramon, CAP CER 9.1PF 50V C0G/NP0 0402, 0402 (1005 Metric), *	Vue
REG1117A-1.8/2K5	Texas Instruments, IC REG LINEAR 1.8V 1A SOT223-4, TO-261-4, TO-261AA, *	Vue
CHM-27-30-80-36-AB00-F2-3	Luminus Devices Inc., LED COB, -, *	Vue
CMDA7BA7A1S	Visual Communications Company - VCC, LED ORANGE CLEAR 2SMD R/A, 2-SMD, No Lead, *	Vue
RNF14BTD324R	Stackpole Electronics Inc., RES 324 OHM 1/4W .1% AXIAL, Axial, *	Vue
PK10-38R-Q	Panduit Corp, CONN RING CIRC 10-12AWG #3/8, -, *	Vue
T38221-20-0	Curtis Industries, CONN BARRIER STRP 20CIRC 0.375", -, *	Vue
BCS-131-L-D-DE-047	Samtec Inc., BOX CONNECTOR SOCKET STRIP, -, *	Vue
316-93-116-41-008000	Mill-Max Manufacturing Corp., CONN STRIP SKT 16POS .100 L.472, -, *	Vue
PT04W-10-98P	Amphenol Industrial Operations, CONN RCPT MALE 6POS GOLD SLDR, -, *	Vue
VE-21N-EU-F3	Vicor Corporation, CONVERTER MOD DC/DC 18.5V 200W, Full Brick, *	Vue
R5F571MFDDFP#30	Renesas Electronics America, IC MCU 32BIT 2MB FLASH 100LFQFP, 100-LQFP, *	Vue

1N6130 Des garanties

Garanties de service

Nous garantissons la satisfaction du client à 100%.

Notre équipe de vente expérimentée et notre équipe d'assistance technique recourent à nos services pour satisfaire tous nos clients.

Garantie de qualité

Nous fournissons une garantie de 90 jours.

Si les articles que vous avez reçus n'étaient pas de qualité parfaite, nous serions responsables de votre remboursement ou de votre remplacement, mais les articles doivent être retournés dans leur état d'origine.

Chaînes d'approvisionnement mondiales - Ressources de distributeurs fiables et agréées

Référence	Fabricant	Description	Stock
1N6130AUS D# V36:1790_07332434	Semtech Corporation	TVS Diode Single Bi-Dir 76V 500W 2-Pin SMD RoHS: Not Compliant	0
JAN1N6130A D# V37:1799_16597461	Sensitron Semiconductors	TVS Diode Single Bi-Dir 76V 500W 2-Pin RoHS: Not Compliant	0
1N6130US D# V36:1790_07332438	Semtech Corporation	TVS Diode Single Bi-Dir 76V 500W 2-Pin SMD RoHS: Not Compliant	0
1N6130 D# V36:1790_07332429	Semtech Corporation	TVS Diode Single Bi-Dir 76V 500W 2-Pin Case G-95 RoHS: Not Compliant	0
JAN1N6130 D# V37:1799_07331581	Semtech Corporation	TVS Diode Single Bi-Dir 76V 500W 2-Pin Case G-95 RoHS: Not Compliant	0
JANTX1N6130 D# V37:1799_07341430	Semtech Corporation	TVS Diode Single Bi-Dir 76V 500W 2-Pin Case G-95	0
JANTX1N6130A D# V37:1799_16596264	Sensitron Semiconductors	TVS Diode Single Bi-Dir 76V 500W 2-Pin RoHS: Not Compliant	0
JANTXV1N6130AUS D# V37:1799_07341963	Semtech Corporation	TVS Diode Single Bi-Dir 76V 500W 2-Pin SMD RoHS: Not Compliant	0
JANTX1N6130AUS D# V37:1799_07341432	Semtech Corporation	TVS Diode Single Bi-Dir 76V 500W 2-Pin SMD RoHS: Not Compliant	0
JAN1N6130US D# V37:1799_07331591	Semtech Corporation	TVS Diode Single Bi-Dir 76V 500W 2-Pin SMD RoHS: Not Compliant	0
JAN1N6130AUS D# V37:1799_16597464	Sensitron Semiconductors	TVS Diode Single Bi-Dir 76V 500W 2-Pin MELF RoHS: Not Compliant	0
JANTXV1N6130A D# V37:1799_07341962	Semtech Corporation	TVS Diode Single Bi-Dir 76V 500W 2-Pin RoHS: Not Compliant	0
1N6130A D# V36:1790_07332432	Semtech Corporation	TVS Diode Single Bi-Dir 76V 500W 2-Pin RoHS: Not Compliant	0
JANTXV1N6130 D# V37:1799_07341961	Semtech Corporation	TVS Diode Single Bi-Dir 76V 500W 2-Pin Case G-95 RoHS: Not Compliant	0

Référence	Fabricant	Description	Stock
JANTXV1N6130 D# JANTXV1N6130	Semtech Corporation	T MET BI 500W 100V - Bulk (Alt: JANTXV1N6130) RoHS: Not Compliant	0
1N6130AJAN D# JAN1N6130A	Semtech Corporation	T MET BI 500W 43V - Bulk (Alt: JAN1N6130A) RoHS: Not Compliant	0
1N6130AUS D# 1N6130AUS	Semtech Corporation	TVS BI 500W SM - Bulk (Alt: 1N6130AUS) RoHS: Not Compliant	0
JAN1N6130A D# JAN1N6130A	Microchip Technology Inc	Diode TVS Single Bi-Dir 76V 500W 2-Pin Case E - Bag (Alt: JAN1N6130A) RoHS: Not Compliant	0
1N6130US D# 1N6130US	Semtech Corporation	MIL 500 W BIPOLAR TVS, SQUARE:SQUARE - Bulk (Alt: 1N6130US) RoHS: Not Compliant	0
JTX1N6130US D# JTX1N6130US	Semtech Corporation	Diode TVS Single Bi-Directional 76V 1uA 500W 2-Pin Surface Mount - Bulk (Alt: JTX1N6130US)	0
1N6130 D# 1N6130	Microchip Technology Inc	Voidless Hermetically Sealed Bi-Directional Transient Suppressor 90.25V 500W 2Case-E Axial Leaded - Bag (Alt: 1N6130) RoHS: Not Compliant	0
JAN1N6130 D# JAN1N6130	Microchip Technology Inc	Diode TVS Single Bi-Direction 76V 500W 2-Pin Case B Bag - Bag (Alt: JAN1N6130) RoHS: Not Compliant	0
JTXV1N6130US D# JTXV1N6130US	Semtech Corporation	Diode TVS Single Bi-Directional 76V 1uA 500W 2-Pin Surface Mount - Bulk (Alt: JTXV1N6130US)	0
1N6130USJANTX D# JANTX1N6130US	Semtech Corporation	MIL 500 W BIPOLAR TVS - SM, SQUARE/SQUARE - Trays (Alt: JANTX1N6130US) RoHS: Not Compliant	0
JTXV1N6130A D# JTXV1N6130A	Semtech Corporation	Diode TVS Single Bi-Directional 76V 1uA 500W 2-Pin Through Hole - Bulk (Alt: JTXV1N6130A)	0
JANTX1N6130 D# JANTX1N6130	Semtech Corporation	T MET BI 500W 100V - Bulk (Alt: JANTX1N6130) RoHS: Not Compliant	0
JANTX1N6130A D# JANTX1N6130A	Semtech Corporation	T MET BI 500W 100V - Bulk (Alt: JANTX1N6130A) RoHS: Not Compliant	0
JANTXV1N6130AUS D# JANTXV1N6130AUS	Microchip Technology Inc	- Bag (Alt: JANTXV1N6130AUS) RoHS: Not Compliant	0
JTXV1N6130AUS D# JTXV1N6130AUS	Semtech Corporation	Diode TVS Single Bi-Directional 76V 1uA 500W 2-Pin Surface Mount - Bulk (Alt: JTXV1N6130AUS)	0
JTX1N6130AUS D# JTX1N6130AUS	Semtech Corporation	Diode TVS Single Bi-Directional 76V 1uA 500W 2-Pin Surface Mount - Bulk (Alt: JTX1N6130AUS)	0
JANTX1N6130AUS D# JANTX1N6130AUS	Sensitron Semiconductors	TVS Single Bi-Directional 76V 500W 2-Pin MELF - Bag (Alt: JANTX1N6130AUS) RoHS: Not Compliant	0
JTXV1N6130 D# JTXV1N6130	Semtech Corporation	Diode TVS Single Bi-Directional 76V 1uA 500W 2-Pin Through Hole - Bulk (Alt: JTXV1N6130)	0
JAN1N6130AUS D# JAN1N6130AUS	Sensitron Semiconductors	TVS Single Bi-Directional 76V 500W 2-Pin MELF - Bag (Alt: JAN1N6130AUS) RoHS: Not Compliant	0
JANTXV1N6130A D# JANTXV1N6130A	Sensitron Semiconductors	TVS Single Bi-Directional 76V 500W 2-Pin - Bulk (Alt: JANTXV1N6130A) RoHS: Not Compliant	0
1N6130JANTX D# JANTX1N6130	Microchip Technology Inc	Voidless Hermetically Sealed Bi-Directional Transient Suppressor 90.25V 500W 2Case-E Axial Leaded - Bag (Alt: JANTX1N6130) RoHS: Not Compliant	0
1N6130A D# 1N6130A	Microchip Technology Inc	Diode TVS Single Bi-Dir 76V 500W 2-Pin Case E - Bag (Alt: 1N6130A) RoHS: Not Compliant	0
1N6130AUSJAN D# JAN1N6130AUS	Semtech Corporation	TVS BI 500W 95V SM - Bulk (Alt: JAN1N6130AUS) RoHS: Not Compliant	0

Référence

Fabricant

Description

Stock

1N6130A

D# 1N6130A

Semtech Corporation

Diode TVS Single Bi-Dir 76V 500W 2-Pin (Alt: 1N6130A)

1N6130

D# 1N6130

Semtech Corporation

Diode TVS Single Bi-Dir 76V 500W 2-Pin Case G-95 (Alt: 1N6130)

RoHS: Not Compliant

Référence	Fabricant	Description	Stock
JAN1N6130AUS	Microsemi Corporation	TRANSIENT VOLTAGE SUPPRESSOR (TVS) - Bulk	0
1N6130A	Microsemi Corporation	TVS SGL BI-DIR 76V 500W 2PIN E-LINE - Bulk	0
JANTXV1N6130A	Microsemi Corporation	TRANSIENT VOLTAGE SUPPRESSOR (TVS) - Bulk	0
1N6130AUS	Microsemi Corporation	TVS SGL BI-DIR 76V 500W 2PIN MELF - Bulk	0
JAN1N6130A	Microsemi Corporation	TRANSIENT VOLTAGE SUPPRESSOR (TVS) - Bulk	0
JANTX1N6130A	Microsemi Corporation	TRANSIENT VOLTAGE SUPPRESSOR (TVS) - Bulk	0
JANTX1N6130AUS	Microsemi Corporation	TRANSIENT VOLTAGE SUPPRESSOR (TVS) - Trays	0
JANTXV1N6130AUS	Microsemi Corporation	TRANSIENT VOLTAGE SUPPRESSOR (TVS) - Trays	0

Référence	Fabricant	Description	Stock
JANTXV1N6130A D# 1086-2937-ND	Microchip Technology Inc	TVS DIODE 76V 137.6V AXIAL	0
1N6130A D# 1N6130AS-ND	Semtech Corporation	TVS DIODE 76V 137.6V AXIAL	0
JANTXV1N6130 D# 1086-19520-ND	Microchip Technology Inc	TVS DIODE 76V 144.48V AXIAL	0
1N6130AUS D# 1N6130AUSS-ND	Semtech Corporation	TVS DIODE 76V 11.2V	0
JAN1N6130A D# JAN1N6130AS-ND	Semtech Corporation	T MET BI 500W 43V	0
1N6130US D# 1N6130US-ND	Semtech Corporation	TVS DIODE 76V 144.1V	0
JTXV1N6130A D# 600-JTXV1N6130A-ND	Semtech Corporation	T MET BI 500W 100V	0
1N6130 D# 1N6130-ND	Semtech Corporation	TVS DIODE 76V 144.1V AXIAL	0
JAN1N6130 D# 1086-19518-ND	Microchip Technology Inc	TVS DIODE 76V 144.48V AXIAL	0
JANTX1N6130 D# 1086-19519-ND	Microchip Technology Inc	TVS DIODE 76V 144.48V AXIAL	0
JTXV1N6130AUS D# 600-JTXV1N6130AUS-ND	Semtech Corporation	T MET BI 500W 100V	0
JTX1N6130AUS D# 600-JTX1N6130AUS-ND	Semtech Corporation	T MET BI 500W 100V SM	0
JTXV1N6130 D# 600-JTXV1N6130-ND	Semtech Corporation	T MET BI 500W 100V	0
JANTX1N6130A D# 1086-2567-ND	Microchip Technology Inc	TVS DIODE 76V 137.6V AXIAL	0
JANTXV1N6130AUS D# 1086-2938-ND	Microchip Technology Inc	TVS DIODE 76V 137.6V B SQ-MELF	0
JAN1N6130US D# 1086-19521-ND	Microchip Technology Inc	TVS DIODE 76V 144.48V B SQ-MELF	0
JANTX1N6130AUS D# 1086-2568-ND	Microchip Technology Inc	TVS DIODE 76V 137.6V B SQ-MELF	0
JTX1N6130A D# 600-JTX1N6130A-ND	Semtech Corporation	T MET BI 500W 100V	0
JAN1N6130AUS D# JAN1N6130AUSS-ND	Semtech Corporation	TVS BI 500W 95V SM	0
JTX1N6130 D# 600-JTX1N6130-ND	Semtech Corporation	T MET BI 500W 100V	0

Référence

Fabricant

Description

Stock

1N61309699305

Microchip Technology Inc

OEM/CM ONLY

101

Référence	Fabricant	Description	Stock
JANTX1N6130A	Microchip Technology Inc	Hi Rel TVS RoHS: Compliant	0
JANTX1N6130AUS	Microchip Technology Inc	Hi Rel TVS RoHS: Compliant	0
JANTXV1N6130A	Microchip Technology Inc	Hi Rel TVS RoHS: Compliant	0
1N6130A	Microchip Technology Inc	TVS RoHS: Compliant	0
JANTXV1N6130	Microchip Technology Inc	Hi Rel TVS RoHS: Compliant	0
JAN1N6130AUS	Microchip Technology Inc	Hi Rel TVS RoHS: Compliant	0
1N6130US	Microchip Technology Inc	TVS RoHS: Compliant	0
1N6130AUS	Microchip Technology Inc	TVS RoHS: Compliant	0
1N6130	Microchip Technology Inc	TVS RoHS: Compliant	0
JAN1N6130	Microchip Technology Inc	Hi Rel TVS RoHS: Compliant	0
JAN1N6130A	Microchip Technology Inc	Hi Rel TVS RoHS: Compliant	0
JANTX1N6130	Microchip Technology Inc	Hi Rel TVS RoHS: Compliant	0
JANTXV1N6130AUS	Microchip Technology Inc	Hi Rel TVS RoHS: Compliant	0
JAN1N6130US	Microchip Technology Inc	Hi Rel TVS RoHS: Compliant	0

Référence	Fabricant	Description	Stock
JANTXV1N6130AUS D# MCHP00000072478	Microchip Technology Inc	Hi Rel TVS	0
1N6130A D# MCHP00000044626	Microchip Technology Inc	TVS	0
JAN1N6130A D# MCHP00000058832	Microchip Technology Inc	Hi Rel TVS	0
JANTXV1N6130 D# MCHP00000072476	Microchip Technology Inc	Hi Rel TVS	0
JANTXV1N6130A D# MCHP00000072477	Microchip Technology Inc	Hi Rel TVS	0
1N6130US D# MCHP00000044628	Microchip Technology Inc	TVS	0
JAN1N6130 D# MCHP00000058831	Microchip Technology Inc	Hi Rel TVS	0
1N6130AUS D# MCHP00000044627	Microchip Technology Inc	TVS	0
1N6130 D# MCHP00000044625	Microchip Technology Inc	TVS	0
JANTX1N6130 D# MCHP00000067033	Microchip Technology Inc	Hi Rel TVS	0
JAN1N6130US D# MCHP00000058834	Microchip Technology Inc	Hi Rel TVS	0
JANTX1N6130A D# MCHP00000067034	Microchip Technology Inc	Hi Rel TVS	0
JAN1N6130AUS D# MCHP00000058833	Microchip Technology Inc	Hi Rel TVS	0
JANTX1N6130AUS D# MCHP00000067035	Microchip Technology Inc	Hi Rel TVS	0

Référence	Fabricant	Description	Stock
JTX1N6130 D# 39AH2970	Semtech Corporation	T MET BI 500W 100V RoHS: Not Compliant Min Qty: 250 Container: Bulk	0
JTX1N6130US D# 39AH2973	Semtech Corporation	MIL 500 W BIPOLAR TVS - SM, SQUARE/SQUARE RoHS: Not Compliant Min Qty: 250 Container: Bulk	0
JTXV1N6130US D# 39AH2381	Semtech Corporation	MIL 500 W BIPOLAR TVS SQUARE : SQUARE RoHS: Not Compliant Min Qty: 250 Container: Bulk	0
JTXV1N6130A D# 39AH2379	Semtech Corporation	T MET BI 500W 100V RoHS: Not Compliant Min Qty: 250 Container: Bulk	0
JTXV1N6130AUS D# 39AH2380	Semtech Corporation	T MET BI 500W 100V RoHS: Not Compliant Min Qty: 250 Container: Bulk	0
JTX1N6130AUS D# 39AH2972	Semtech Corporation	T MET BI 500W 100V SM RoHS: Not Compliant Min Qty: 250 Container: Bulk	0
JTXV1N6130 D# 39AH2378	Semtech Corporation	T MET BI 500W 100V RoHS: Not Compliant Min Qty: 250 Container: Bulk	0
JTX1N6130A D# 39AH2971	Semtech Corporation	T MET BI 500W 100V RoHS: Not Compliant Min Qty: 250 Container: Bulk	0

Référence	Fabricant	Description	Stock
1N6130+JAN D# NS-1N6130+JAN	Defense Logistics Agency	OEM/CM ONLY	1763
1N6130AUS+JANTXV D# NS-1N6130AUS+JANTXV	Defense Logistics Agency	OEM/CM ONLY	1796
1N6130AUS+JANTX D# NS-1N6130AUS+JANTX	Defense Logistics Agency	OEM/CM ONLY	8269
JAN1N6130AUS D# NS-JAN1N6130AUS	Microsemi Corporation	OEM/CM ONLY	1123
1N6130A+JANTX D# NS-1N6130A+JANTX	Defense Logistics Agency	OEM/CM ONLY	1962
1N6130US+JANTX D# NS-1N6130US+JANTX	Defense Logistics Agency	OEM/CM ONLY	2479
JANTXV1N6130A D# NS-JANTXV1N6130A	Microsemi Corporation	OEM/CM ONLY	1139
JAN1N6130A D# NS-JAN1N6130A	Microsemi Corporation	OEM/CM ONLY	1184
1N6130US+JANTXV D# NS-1N6130US+JANTXV	Defense Logistics Agency	OEM/CM ONLY	3822
1N6130AUS+JAN D# NS-1N6130AUS+JAN	Defense Logistics Agency	OEM/CM ONLY	1703
1N6130A+JANTXV D# NS-1N6130A+JANTXV	Defense Logistics Agency	OEM/CM ONLY	1705
JANTX1N6130A D# NS-JANTX1N6130A	Microsemi Corporation	OEM/CM ONLY	1142
JANTXV1N6130AUS D# NS-JANTXV1N6130AUS	Microsemi Corporation	OEM/CM ONLY	1137
JANTX1N6130AUS D# NS-JANTX1N6130AUS	Microsemi Corporation	OEM/CM ONLY	1103
1N6130+JANTX D# NS-1N6130+JANTX	Defense Logistics Agency	OEM/CM ONLY	2267
1N6130A+JAN D# NS-1N6130A+JAN	Defense Logistics Agency	OEM/CM ONLY	1136
1N6130+JANTXV D# NS-1N6130+JANTXV	Defense Logistics Agency	OEM/CM ONLY	4050

Référence

Fabricant

Description

Stock

JANTX1N6130A

Semtek Innovative Solutions

Transient Suppressor Diode, Single, Bi-Directional, 76 Volt, DO-204AF

Référence

Fabricant

Description

Stock

J1N6130A

Microwave Semiconductor

OEM/CM ONLY

948

Quick Inquiry

1N6130

Qualité certifiée

L'engagement de Heisener en matière de qualité a façonné nos processus d'approvisionnement, de test, d'expédition et à chaque étape intermédiaire. Cette fondation est à la base de chaque composant que nous vendons.

ISO9001:2015, ICAS, IAF, UKAS