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Microchip Technology 1N4134B
- Part No.:
- 1N4134B
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4134B.pdf
- Description:
- DIODE ZENER 91V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:9,569
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Product details
Overview
1N4134B from Microsemi is a 500 mW, 91 V Zener diode in DO-35 glass package, qualified to JANTXV level per MIL-PRF-19500/435, with ±5% voltage tolerance, 1200 Ω dynamic impedance at 250 mA test current, and 40 µA maximum reverse leakage at 73 V. It delivers stable voltage regulation in high-reliability power supply reference circuits.
For engineers reviewing the 1N4134B datasheet, 1N4134B pinout, 1N4134B application, or 1N4134B equivalent, key selection factors include its 91 V nominal Zener voltage, 40 µA IR @ 73 V, 1200 Ω ZZT, -65 °C to +175 °C operating temperature range, and metallurgically bonded construction for low noise and radiation hardness.
Technical Context
This device operates as a precision voltage reference in reverse-biased breakdown mode, with Zener voltage specified at IZT = 250 mA and characterized for thermal stability across -65 °C to +175 °C. Its metallurgical bond minimizes interfacial resistance and enhances long-term parameter stability under thermal cycling.
The 1N4134B exhibits a positive temperature coefficient of +0.100 %/°C and low noise density (≤1 µV/√Hz below 6.8 V), making it suitable for low-drift analog references where parametric consistency over temperature and time is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 91 V at 250 mA - defines precise regulation point for high-voltage reference design |
| Zener Impedance | 1200 Ω at 250 mA - indicates moderate regulation stiffness; suitable for medium-precision applications |
| Max Reverse Current | 40 µA at 73 V - ensures low leakage in standby or low-current bias conditions |
| Power Dissipation | 500 mW at 25 °C - supports robust operation with linear derating to zero at 175 °C |
| Temp Coefficient | +0.100 %/°C - enables predictable voltage drift compensation in wide-temperature environments |
| Junction Temp Range | -65 °C to +175 °C - validated for aerospace, defense, and downhole industrial use |
| Package | DO-35 (DO-204AH) - axial-leaded, hermetically sealed glass package for high reliability and moisture resistance |
Pinout & Package
DO-35 (DO-204AH) glass axial-leaded package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias reference node | Connected to lower-potential side of regulated circuit; establishes Zener conduction path |
| Cathode | Regulated output node | Banded end; supplies stable 91 V reference when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Eliminates interfacial delamination risk, ensuring long-term Zener voltage stability under thermal stress |
| MIL-PRF-19500/435 qualification | Validated to JANTXV reliability level for mission-critical systems requiring proven failure-rate data |
| Low noise density | ≤1 µV/√Hz below 6.8 V - enables use in low-noise analog references without added filtering |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for space and nuclear environments |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - simplifies handling and board assembly without special ESD controls |
Applications
| High-Voltage Power Supply Reference | Aerospace Voltage Monitor |
|---|---|
Use Scenario: Stabilizing feedback node in 100 V-class DC-DC converter output stage. IC Role / Device Role / Timing Role: Zener reference element providing fixed 91 V threshold for error amplifier comparison. Use Value: Maintains ±5% output regulation across load and line variations due to tight VZ tolerance and low ZZT drift. | Use Scenario: Overvoltage detection in satellite bus power distribution unit. IC Role / Device Role / Timing Role: Precision clamp and reference for comparator input in fault-sensing circuitry. Use Value: Enables reliable trip-point accuracy at 91 V with guaranteed operation from -65 °C to +175 °C and radiation tolerance. |
| Defense System Bias Network | Industrial Sensor Excitation |
Use Scenario: Providing stable bias voltage to RF front-end amplifiers in radar transceivers. IC Role / Device Role / Timing Role: High-reliability Zener shunt regulator maintaining constant 91 V supply under transient load conditions. Use Value: Ensures amplifier gain stability via low-noise, low-drift reference unaffected by ESD or thermal shock. | Use Scenario: Exciting high-impedance piezoresistive pressure sensors in oilfield downhole tools. IC Role / Device Role / Timing Role: Fixed-voltage source enabling ratiometric measurement with ADC reference scaling. Use Value: Delivers repeatable excitation despite extreme ambient temperatures and mechanical vibration due to hermetic DO-35 packaging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4134-1 | Same 91 V nominal Zener voltage, identical DO-35 package, but rated for commercial-grade only (no JANTXV qualification) | Lacks military screening and extended temperature validation; unsuitable for aerospace or defense deployments | Select 1N4134-1 only for cost-sensitive commercial designs where MIL-spec reliability is not required |
| 1N4134UR-1 | Surface-mount DO-213AA variant with same electrical specs, but no axial leads; RoHS-compliant matte-tin plating | Requires SMT reflow process and PCB layout change; eliminates through-hole assembly step | Choose 1N4134UR-1 when board space constraints or automated assembly mandate surface-mount packaging |
Compared with 1N4134-1 and 1N4134UR-1, the 1N4134B provides verified JANTXV-level reliability, full -65 °C to +175 °C operation, and metallurgical bond integrity-making it the sole choice for high-assurance systems where field failure is unacceptable.
Availability
1N4134B is available at Aetrix Electronics and suitable for high-reliability power supply reference, aerospace voltage monitoring, and defense system bias network applications requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4134B includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N4134B belongs to Microsemi's legacy MIL-qualified Zener diode family, designed specifically for precision voltage reference and overvoltage protection in mission-critical systems where parameter stability and long-term reliability are non-negotiable.
FAQ
What is the Zener voltage tolerance for the 1N4134B?
The 1N4134B has a nominal Zener voltage of 91 V with a standard tolerance of ±5%, as defined in the JEDEC-registered electrical characteristics table. This tolerance applies at 250 mA test current and 25 °C ambient temperature, and is maintained across the full qualified operating temperature range due to its metallurgical bond construction and JANTXV-level screening.
Is the 1N4134B suitable for space applications?
Yes, the 1N4134B is inherently radiation-hardened per Microsemi MicroNote 050 and qualified to JANTXV level per MIL-PRF-19500/435, making it suitable for low-earth orbit and geosynchronous satellite applications where total ionizing dose (TID) resilience and single-event effect immunity are required. Its DO-35 hermetic glass package further enhances reliability in vacuum environments.
What is the maximum reverse leakage current for the 1N4134B?
The 1N4134B specifies a maximum reverse current (IR) of 40 µA at VR = 73 V (80% of nominal Zener voltage), measured at 25 °C. This low leakage ensures minimal power loss in high-impedance reference networks and supports stable operation in battery-backed or ultra-low-power monitoring circuits.
Does the 1N4134B require heatsinking in standard operation?
No external heatsink is required for the 1N4134B at ambient temperatures ≤50 °C and power dissipation ≤500 mW. Its thermal resistance junction-to-ambient is 300 °C/W on a standard FR4 board with 4 mm² copper pads. Derating begins linearly above 50 °C, reaching zero dissipation at 175 °C - consistent with its full military temperature range rating.
How is polarity marked on the 1N4134B?
The 1N4134B uses a cathode band marking on the glass body to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode to achieve Zener regulation. This marking complies with JEDEC standards and is visible under standard visual inspection, supporting correct orientation during manual or automated assembly.
1N4134B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 91 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1200 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 69.16 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-7
1N4134B FAQ
1.How can I place an order for 1N4134B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4134B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N4134B reliable?
The price and inventory of 1N4134B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4134B is usually 5 days.
3.What payment methods are accepted for 1N4134B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4134B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4134B?
1N4134B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4134B order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N4134B?
For technical support, including 1N4134B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4134B requirements.
6.How does Aetrix verify that 1N4134B is sourced from the original manufacturer or authorized distributors?
All 1N4134B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N4134B meets industry standards.
7.What is the process for return or replacement of 1N4134B?
All 1N4134B units undergo pre-shipment inspection (PSI). If there is an issue with 1N4134B, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N4134B part is unused and in its original packaging.
Return procedure for 1N4134B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4134B Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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