Name: 1N5991B
Brand: Fairchild/ON Semiconductor
SKU: 1N5991B
Availability: InStock
Rating: 5 (174 reviews)

1N5991B

For Reference Only

Part Number	1N5991B
Manufacturer	Fairchild/ON Semiconductor
Description	DIODE ZENER 4.3V 500MW DO35
Datasheet	1N5991B Datasheet 1N5991B Specifications
Package	DO-204AH, DO-35, Axial
ECAD
In Stock	7,040 piece(s)
Unit Price	Request a Quote
Lead Time	Can Ship Immediately
Estimated Delivery Time	Apr 18 - Apr 23 (Choose Expedited Shipping)
Request for Quotation

Payment Methods
Delivery Services

Part Number # 1N5991B (Diodes - Zener - Single) is manufactured by Fairchild/ON Semiconductor and distributed by Heisener. Being one of the leading electronics distributors, we carry many kinds of electronic components from some of the world’s top class manufacturers. Their quality is guaranteed by its stringent quality control to meet all required standards.

For 1N5991B specifications/configurations, quotation, lead time, payment terms of further enquiries please have no hesitation to contact us. To process your RFQ, please add 1N5991B with quantity into BOM. Heisener.com does NOT require any registration to request a quote of 1N5991B.

1N5991B Specifications

Manufacturer	Fairchild/ON Semiconductor
Category	Discrete Semiconductor Products - Diodes - Zener - Single
Package	DO-204AH, DO-35, Axial
ECAD
Series	-
Voltage - Zener (Nom) (Vz)	4.3V
Tolerance	±5%
Power - Max	500mW
Impedance (Max) (Zzt)	88 Ohms
Current - Reverse Leakage @ Vr	5µA @ 1V
Voltage - Forward (Vf) (Max) @ If	1.2V @ 200mA
Operating Temperature	-65°C ~ 200°C
Mounting Type	Through Hole
Package / Case	DO-204AH, DO-35, Axial
Supplier Device Package	DO-35

1N5991B Datasheet

1N5991B Reviews

Eric*****over

March 21, 2023

★ ★ ★ ★ ★

The specs range is wide for a selection and the customer service is great.

Gavi*****ntoya

March 15, 2023

★ ★ ★ ★ ★

To be honest, you're beating your competitor on delivery - sometimes I request 2nd day and you still get it here overnight. Thanks!

Salm*****nnon

February 27, 2023

★ ★ ★ ★ ★

They are great as I need, I give 5 stars.

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1N5991B Packaging

1N5991B FAQ

1. How to order 1N5991B 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 1N5991B is from the original manufacturer or authorized agents?

We have a professional and experienced quality control team to strictly verify and test the 1N5991B. All suppliers must pass our qualification reviews before they can publish their products including 1N5991B on Heisener; we pay more attention to the channels and quality of 1N5991B products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
3. Are the 1N5991B price and inventory displayed accurate?

The price and inventory of 1N5991B 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 1N5991B?

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 1N5991B we delivered, we will accept the replacement or return of the 1N5991B 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 1N5991B.

(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 1N5991B pin diagram, 1N5991B datasheet?

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

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1N5991B Guarantees

Service Guarantees

We guarantee 100% customer satisfaction.

Our experienced sales team and tech support team back our services to satisfy all our customers.

Quality Guarantees

We provide 90 days warranty.

If the items you received were not in perfect quality, we would be responsible for your refund or replacement, but the items must be returned in their original condition.

Global Supply Chains - Reliable and Authorized Distributor Resources

Part Number	Manufacturer	Description	Stock
1N5991B D# 1N5991B	ON Semiconductor	Diode Zener Single 4.3V 5% 0.5W 2-Pin DO-35 - Bulk (Alt: 1N5991B) RoHS: Not Compliant	0
1N5991B TR D# 1N5991B TR	Central Semiconductor Corp	Diode Zener Single 4.3V 5% 0.5W 2-Pin DO-35 T/R - Tape and Reel (Alt: 1N5991B TR) RoHS: Not Compliant	0
1N5991BRL D# 1N5991BRL	NXP Semiconductors	- Bulk (Alt: 1N5991BRL)	0
1N5991B TR PBFREE D# 1N5991B TR PBFREE	Central Semiconductor Corp	Diode Zener Single 4.3V 5% 0.5W 2-Pin DO-35 T/R - Tape and Reel (Alt: 1N5991B TR PBFREE) RoHS: Compliant	0
1N5991B TR TIN/LEAD D# 1N5991B TR TIN/LEAD	Central Semiconductor Corp	Diode Zener Single 4.3V 5% 0.5W 2-Pin DO-35 T/R - Tape and Reel (Alt: 1N5991B TR TIN/LEAD) RoHS: Not Compliant	0

Part Number	Manufacturer	Description	Stock
1N5991B_T50R	Fairchild Semiconductor Corporation	Diode Zener Single 4.3V 5% 500mW 2-Pin DO-35 T/R	0
1N5991B_T50A	Fairchild Semiconductor Corporation	Diode Zener Single 4.3V 5% 500mW 2-Pin DO-35 Ammo	0
1N5991B	Fairchild Semiconductor Corporation	Diode Zener Single 4.3V 5% 500mW 2-Pin DO-35 Bulk	46000

Part Number	Manufacturer	Description	Stock
1N5991B-TP D# 1N5991B-TP-ND	Micro Commercial Components	DIODE ZENER 4.3V 500MW DO35	0
1N5991B_T50R D# 1N5991B_T50R-ND	ON Semiconductor	DIODE ZENER 4.3V 500MW DO35	0
1N5991B D# 2156-1N5991B-FS-ND	Rochester Electronics LLC	DIODE ZENER 4.3V 500MW DO35	28704
1N5991BRL D# 2156-1N5991BRL-ND	Rochester Electronics LLC	DIODE ZENER 4.3V 500MW DO204AH	85000
1N5991B TR PBFREE D# 1514-1N5991BTRPBFREETR-ND	Central Semiconductor Corp	DIODE ZENER 4.3V 500MW DO35	0
1N5991BRL-ON D# 2156-1N5991BRL-ON-ND	Rochester Electronics LLC	DIODE ZENER 4.3V 0.5W 5% UNIDIR	0
1N5991B_T50A D# 1N5991B_T50A-ND	ON Semiconductor	DIODE ZENER 4.3V 500MW DO35	0

Part Number

Manufacturer

Description

Stock

1N5991B

ON Semiconductor

1N5991B Series 500 mW 4.3 V 200 mA Through Hole Zener Diode - DO-35

RoHS: Compliant

pbFree: Yes

1N5991B-TP

Micro Commercial Components

RoHS: Compliant

pbFree: Yes

Part Number	Manufacturer	Description	Stock
1N5991BRL	Rochester Electronics LLC	OEM/CM QUOTES ONLY \| NO BROKERS	191813
1N5991BRLON	Rochester Electronics LLC	OEM/CM QUOTES ONLY \| NO BROKERS	22000
1N5991BTP	Micro Commercial Components	OEM/CM QUOTES ONLY \| NO BROKERS	11000
1N5991B	Motorola Semiconductor Products	OEM/CM QUOTES ONLY \| NO BROKERS	53042

Part Number

Manufacturer

Description

Stock

1N5991B

Fairchild Semiconductor Corporation

OEM/CM Immediate delivery

20000

Part Number

Manufacturer

Description

Stock

1N5991B

D# 494-1N5991B

Microchip Technology Inc

Zener Diodes Zener Diodes

RoHS: Not Compliant

409

Part Number

Manufacturer

Description

Stock

1N5991B

Microchip Technology Inc

Zener Diodes

RoHS: Compliant

Part Number

Manufacturer

Description

Stock

1N5991B

D# MCHP00000044054

Microchip Technology Inc

Zener Diodes

Part Number	Manufacturer	Description	Stock
1N5991B_T50R D# NS-1N5991B_T50R	Fairchild Semiconductor Corporation	OEM/CM ONLY	3057
1N5991B D# NS-1N5991B	FSC	OEM/CM ONLY	3294
1N5991B_T50A D# NS-1N5991B_T50A	Fairchild Semiconductor Corporation	OEM/CM ONLY	1267

Part Number

Manufacturer

Description

Stock

1N5991B

Fairchild Semiconductor Corporation

Zener Diode, 4.3V, 5%, 0.5W, Unidirectional, DO-35

RoHS: Compliant

28704

1N5991BRL

Motorola Mobility LLC

Zener Diode, 4.3V, 5%, 0.5W, Unidirectional, DO-204AH

RoHS: Compliant

85000

Part Number

Manufacturer

Description

Stock

1N5991BRL

Motorola Semiconductor Products

OEM/CM ONLY

7276

1N5991BTP

Micro Commercial Components

OEM/CM ONLY

50016

Part Number

Manufacturer

Description

Stock

1N5991B

Fairchild Semiconductor Corporation

IN stock Immediate delivery

19985

Quick Inquiry

1N5991B

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