Logo
Contact Us
Cookies Policy
Terms of Use
Privacy Policy
phone
Vivi (Sales)
phone
Lucy (Sales)
phone
Ban (Sales)
phone
+86 755-2845-3125
RFQ List
  • open navigation menu
    • Logo
    • RFQ List
      • Manufacturers
      • Hot Products
      • RFQ
      • Blog
      • Tools
      • Sourcing Solutions
      • PCB/SMT
      • About Us
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    CONTACT US
    +86 755-2845-3125
    [email protected][email protected][email protected]
    Room 2709B, 5A Office Building, Longguang Jiuzuan, Hongshan, Longhua District, Shenzhen, China
    Company
    • Blog
    • About Us
    • Contact Us
    Resources
    • Categories
    • Manufacturers
    • Tools
    • RFQ
    Quick link
    • Privacy Policy
    • Terms of Use
    • Cookies Policy
    • Refund & Return Policy
    • Shipping & Delivery Policy
    Payment
    • Payment method
    • Payment method
    • Payment method
    • Payment method
    Logistics
    • Logistics partner
    • Logistics partner
    • Logistics partner
    • Logistics partner

    © 2026 Copyright. All Rights Reserved. Made by ICAllIn

    Part number
    Part number
    1. Home/
    2. All Categories/
    3. Discrete Semiconductors/
    4. Diodes & Rectifiers/
    5. 1N991B Microchip

    1N991B [Microchip]

    1N991B
    1N991B

    Part No:

    1N991B

    Category:

    Diodes & Rectifiers

    Manufacturer:

    Microchip

    Description:

    The popular 1N957B-1 through 1N992B-1 series of 0.5 watt Zener voltage regulators provides a selection from 6.8 to 200 volts in a standard 5%, 2% and 1% tolerance versions.

    RoHS Status:

    Product FAQ

    1. Is 1N991B available for RFQ?

    Yes. 1N991B by Microchip is available for RFQ. Submit your required quantity and our team will confirm real-time stock, lead time, and volume pricing.

    2. Why is there no fixed price for 1N991B?

    Pricing for 1N991B can vary by order quantity, market availability, date code, packaging, and delivery destination. Request a quote to receive the latest volume pricing.

    3. What are the key specifications of 1N991B?

    1N991B is a Microchip Diodes & Rectifiers with Thermal Resistance Junction To Ambient: 300°C/W and Thermal Resistance Junction To Lead: 250°C/W. Review the product details or submit an RFQ if you need confirmation before purchase.

    4. How fast can I get a quote for 1N991B?

    Our sales team usually responds within 24 hours after receiving your RFQ. The quote may include stock status, unit price, lead time, shipping options, and available alternatives.

    5. How soon can 1N991B be shipped?

    If stock is confirmed, in-stock parts can usually ship within 1–2 business days. Final lead time depends on quantity, stock source, and delivery destination.

    6. Can you suggest alternatives to 1N991B?

    Yes. If 1N991B is unavailable, obsolete, or does not meet your required lead time, we can help check similar Microchip Diodes & Rectifiers parts or compatible alternatives.

    RFQ

    Part Number:

    1N991B

    Manufacturer:

    Microchip

    Looking for Pricing? Contact us for volume pricing.

    IMPORTANT NOTICE

    Quotations are subject to stock availability and may vary with market conditions. Prices and lead times are not guaranteed until a purchase order is confirmed. Ensure your contact details are correct to avoid delays in response.

    Featured Product

    Stock Status:

    Available for RFQ

    Pricing:

    Request Volume Pricing

    Quote Response:

    Within 24 Hours

    Shipping:

    In-stock parts ship in 1–2 business days

    Specification

    Type
    Parameter
    Forward Voltage 1N957 1N985
    1.1V
    Forward Voltage 1N986 1N992
    1.3V
    Operating Temperature
    -65°C ~ +175°C
    Package
    DO-35 (DO-204AH) and DO-213AA (MELF surface mount)
    Packing
    Tray; Tape and reel
    Power Dissipation
    0.5W (at TL=50°C) and 0.4W (at TA=55°C on PCB)
    RoHS Status
    RoHS Compliant
    RoHS Status
    RoHS Compliant
    Solder Temperature
    260°C
    Thermal Resistance Junction To Ambient
    300°C/W
    Thermal Resistance Junction To Lead
    250°C/W
    Weight
    0.2 grams

    Products Detail

    0.5 watt Zener voltage regulators in the 1N957B-1 to 1N992B-1 series, providing a selection from 6.8 to 200 volts with 5%, 2%, and 1% tolerance options. These are axial-leaded glass DO-35 Zeners with internal metallurgical bond. Available in military qualified (JAN, JANTX, JANTXV) and commercial RoHS compliant versions. Features include JEDEC registration, non-sensitivity to ESD, minimal capacitance, and inherent radiation hardness.

    Key Features

    • JEDEC registered 1N957B to 1N992B number series, Internal metallurgical bond, JAN, JANTX, and JANTXV qualifications available per MIL-PRF-19500/117 for part numbers 1N962B-1 thru 1N992B-1, Upscreening available for 1N957B-1 through 1N961B-1, RoHS compliant versions available (commercial grade only), Regulates voltage over a broad operating current and temperature range, Extensive selection from 6.8 to 200 V, Standard voltage tolerance ±5% with optional ±2% or ±1%, Flexible axial-lead mounting terminals, Non-sensitive to ESD per MIL-STD-750 method 1020, Minimal capacitance, Inherently radiation hard as described in Microsemi MicroNote 050

    Application scenarios

    • Voltage regulation
    • power management
    • industrial control
    • and applications requiring radiation hardness.
    Shipping & Warranty

    Fast Dispatch: Ships in 5-7 days(in-stock parts within 1-2 days)

    Unishop Global Export: 1-7 days, $40.00

    Guaranteed Delivery: Door-to-door in 30 days

    Compliant Worldwide Shipping: DHL, FedEx, SF, and UPS.

    Feature

    • 30-Day Guarantee
      30-Day Guarantee
    • Fasted Delivery
      Fasted Delivery
    • Hassle-Free Returns
      Hassle-Free Returns
    • Secure payment method
      Secure payment method

    BEST SELL
    VN7050AJTR

    VN7050AJTR

    STMicroelectronics

    BEST SELL
    MT41K512M16VRP-107 IT:P

    MT41K512M16VRP-107 IT:P

    Micron

    BEST SELL
    ISL8215MIRZ

    ISL8215MIRZ

    RENESAS

    BEST SELL
    FS32K118LFT0VLHT

    FS32K118LFT0VLHT

    NXP

    BEST SELL
    BAV99-7-F-CN

    BAV99-7-F-CN

    Unknown

    BEST SELL
    H9TQ26ADFTACUR-KUM

    H9TQ26ADFTACUR-KUM

    SK HYNIX

    BEST SELL
    H5AN8G8NCJR-XNC

    H5AN8G8NCJR-XNC

    SK HYNIX

    BEST SELL
    PMEG4010CEGW-QJ

    PMEG4010CEGW-QJ

    NEXPERIA

    BEST SELL
    ATSAME70Q20B-AN

    ATSAME70Q20B-AN

    Microchip

    BEST SELL
    KHBB84A03B-MC1J

    KHBB84A03B-MC1J

    SAMSUNG

    Related Information
    • Part Number
      Manufacturer
      Stock Status
      Pricing
      RoHS/Datasheet
    • 1N5943PE3/TR8
      Microchip
      Available for RFQ
      Request Volume Pricing
      -
    • CDLL980A
      Microchip
      Available for RFQ
      Request Volume Pricing
      -
    • SMAJ5933BE3/TR13
      Microchip
      Available for RFQ
      Request Volume Pricing
    • 2EZ11D2/TR8
      Microchip
      Available for RFQ
      Request Volume Pricing
    • 1PMT4133/TR13
      Microchip
      Available for RFQ
      Request Volume Pricing
    • 1N5919AP/TR8
      Microchip
      Available for RFQ
      Request Volume Pricing
    • JANTX1N3045DUR-1/TR
      Microchip
      Available for RFQ
      Request Volume Pricing
      -
    • 64075
      Microchip
      Available for RFQ
      Request Volume Pricing
      -
    • MX1N3312D
      Microchip
      Available for RFQ
      Request Volume Pricing
      -
    • SMAJ4747AE3/TR13
      Microchip
      Available for RFQ
      Request Volume Pricing

    1N3005A

    1N3005A

    Microchip

    1N2985A

    1N2985A

    Microchip

    1N4740P/TR12

    1N4740P/TR12

    Microchip

    1N2982B

    1N2982B

    Microchip

    1N4716

    1N4716

    Microchip

    1N4733CP/TR12

    1N4733CP/TR12

    Microchip

    1N3027B-1/TR

    1N3027B-1/TR

    Microchip

    1N3783

    1N3783

    Microchip

    1N3511D

    1N3511D

    Microchip

    1N4736E3/TR13

    1N4736E3/TR13

    Microchip

    Transistors(202881)Thyristors(12548)Discrete & Power Modules(14567)

    No recently viewed products