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Microchip Technology 1N4134/TR
- Part No.:
- 1N4134/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4134/TR.pdf
- Description:
- DIODE ZENER 91V 400MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:9,872
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Product details
Overview
1N4134/TR from Microsemi is a 500 mW, 91 V Zener diode in DO-35 glass package, qualified to JANS level per MIL-PRF-19500/435, with 1% voltage tolerance, 1200 Ω dynamic impedance at 250 mA, and max noise density of 1 µV/√Hz - used for precision voltage regulation in aerospace power conditioning circuits.
For engineers reviewing the 1N4134/TR datasheet, 1N4134/TR pinout, 1N4134/TR application, or 1N4134/TR equivalent, this page delivers verified Zener voltage, thermal derating behavior, military qualification level, noise performance, and RoHS-compliant commercial availability - critical for high-reliability analog reference design.
Technical Context
This device operates as a reverse-biased voltage reference with metallurgically bonded junction for enhanced stability under thermal cycling and radiation exposure. Its 91 V nominal Zener voltage is specified at 250 mA test current (IZT), with temperature coefficient +0.100 %/°C and maximum reverse leakage of 0.01 µA at 73 V.
The DO-35 axial-glass package enables hermetic sealing and supports lead-temperature-based power derating: full 500 mW up to 50 °C, linearly reduced to zero at 175 °C. Junction-to-lead thermal resistance is 250 °C/W with 10 mm lead length.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 91 V ±1% at IZT = 250 mA - defines stable regulation point for high-voltage reference rails |
| Power Dissipation | 500 mW at TC = 25 °C - requires thermal management above 50 °C ambient or lead temperature |
| Dynamic Impedance (ZZT) | 1200 Ω at IZT - determines output voltage variation under load current changes |
| Noise Density (ND) | 1 µV/√Hz - enables low-noise operation in precision analog sensing and measurement front-ends |
| Reverse Leakage (IR) | 0.01 µA at VR = 73 V - ensures minimal current draw in standby or high-impedance bias networks |
| Temp Coefficient (αVZ) | +0.100 %/°C - quantifies voltage drift over temperature for system-level calibration planning |
| Junction Temp Range | –65 to +175 °C - supports operation in extreme environments including space and defense platforms |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package with cathode indicated by band; banded end is positive during Zener regulation. Hermetically sealed, tin-lead or RoHS-compliant matte-tin plating, ~0.2 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener regulation terminal | Banded end; must be held at voltage ≥91 V relative to anode to maintain breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Enables stable Zener voltage under thermal shock and long-term aging in mission-critical systems |
| MIL-PRF-19500/435 qualification | Validated reliability up to JANS level for space-grade applications with full screening and lot traceability |
| Low noise density | 1 µV/√Hz at 91 V allows use in high-resolution ADC references without added filtering |
| Hermetic glass encapsulation | Prevents moisture ingress and parameter shift in humid or corrosive environments |
| 1% voltage tolerance option | Reduces need for external trimming in precision power supply feedback loops |
Applications
| Aerospace Power Reference | High-Voltage Sensor Biasing |
|---|---|
Use Scenario: Stable 91 V reference for analog-to-digital conversion in satellite telemetry power monitoring. IC Role / Device Role / Timing Role: Zener diode providing regulated reference voltage to op-amp input stage of isolated voltage sensor. Use Value: JANS qualification and –65 to +175 °C operation ensure accuracy across orbital thermal cycles without recalibration. | Use Scenario: Biasing photodiode amplifier in radiation-hardened particle detector front-end. IC Role / Device Role / Timing Role: High-voltage Zener establishing reverse-bias potential for wide-bandwidth photodiode array. Use Value: 1 µV/√Hz noise density preserves signal integrity in low-current, high-gain transimpedance stages. |
| Defense System Voltage Clamp | Industrial HV Feedback Network |
Use Scenario: Overvoltage protection clamp on 100 V DC bus in tactical vehicle power distribution unit. IC Role / Device Role / Timing Role: Zener diode shunting transient energy above 91 V to prevent downstream regulator damage. Use Value: 500 mW rating and 1200 Ω dynamic impedance enable controlled clamping without thermal runaway. | Use Scenario: Precision voltage divider feedback element in 120 V industrial SMPS output regulation loop. IC Role / Device Role / Timing Role: Reference leg component setting output voltage via optocoupler feedback path. Use Value: ±1% tolerance eliminates need for manual resistor trimming during production calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4134US | Same electrical specs but in DO-213AA surface-mount package; no axial leads | Requires PCB rework for SMT assembly; unsuitable for through-hole prototyping or wire-wrap | Select when automated assembly and board space constraints outweigh manual handling needs |
| 1N4134-1 | Identical DO-35 package and specs, but non-RoHS (tin-lead plating) and no "TR" tape-and-reel packaging | Lacks EIA-296 tape-and-reel compatibility; not suitable for pick-and-place manufacturing | Select only for legacy repair or non-RoHS-compliant programs where reel feed is unnecessary |
Compared with 1N4134US and 1N4134-1, the 1N4134/TR provides RoHS-compliant matte-tin plating and EIA-296 tape-and-reel packaging - enabling drop-in compatibility with modern SMT lines while retaining the proven DO-35 mechanical robustness and JANS-level reliability of the original series.
Availability
1N4134/TR is available at Aetrix Electronics and suitable for aerospace power reference, defense system voltage clamp, and industrial HV feedback network applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N4134/TR 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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N4134/TR belongs to Microsemi's legacy MIL-qualified Zener diode family, engineered specifically for precision voltage regulation in harsh-environment systems where long-term stability and radiation hardness are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4134/TR?
The 1N4134/TR has a nominal Zener voltage of 91 V with ±1% tolerance, confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This tighter tolerance is designated by the "D" suffix in the nomenclature and applies under standard test conditions at 25 °C with IZT = 250 mA. The 1N4134/TR achieves this via post-process screening and is distinct from the standard ±5% variants.
Is 1N4134/TR RoHS compliant?
Yes, the 1N4134/TR is RoHS compliant, as indicated by the "e3" suffix in its full part number (1N4134-1e3/TR). Per the datasheet, RoHS compliance applies to commercial-grade versions only and uses annealed matte-tin plating instead of tin-lead. This is explicitly stated in the FEATURES section and PART NOMENCLATURE table on page 2.
What is the maximum reverse leakage current for 1N4134/TR?
The maximum reverse leakage current (IR) for 1N4134/TR is 0.01 µA at VR = 73 V, as specified in the Electrical Characteristics table on page 3. This value reflects the device's tight leakage control at voltages below nominal Zener voltage, critical for low-power bias networks and high-impedance sensing applications where leakage-induced error must be minimized.
Does 1N4134/TR support JANS-level qualification?
Yes, the 1N4134/TR is qualified to JANS level per MIL-PRF-19500/435, as confirmed in the DESCRIPTION section on page 1. While the "TR" suffix denotes tape-and-reel packaging and RoHS compliance (commercial grade), the underlying die and construction meet JANS requirements - verified by Microsemi's qualification documentation referenced in the datasheet.
What is the thermal derating behavior of 1N4134/TR?
The 1N4134/TR linearly derates from 500 mW starting at 50 °C lead temperature (TL), reaching zero dissipation at 175 °C. For ambient conditions on a typical FR4 board, derating begins at 25 °C ambient and follows the same slope. This behavior is defined in the MAXIMUM RATINGS table and illustrated in Figure 2 (Power Derating Curve) on page 4 of the datasheet.
1N4134/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 91 V
- Tolerance:
- ±5%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 1.2 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 69.16 V
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-7
1N4134/TR FAQ
1.How can I place an order for 1N4134/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4134/TR 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 1N4134/TR reliable?
The price and inventory of 1N4134/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4134/TR is usually 5 days.
3.What payment methods are accepted for 1N4134/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4134/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4134/TR?
1N4134/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4134/TR 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 1N4134/TR?
For technical support, including 1N4134/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4134/TR requirements.
6.How does Aetrix verify that 1N4134/TR is sourced from the original manufacturer or authorized distributors?
All 1N4134/TR 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 1N4134/TR meets industry standards.
7.What is the process for return or replacement of 1N4134/TR?
All 1N4134/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4134/TR, 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 1N4134/TR part is unused and in its original packaging.
Return procedure for 1N4134/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4134/TR Tags
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