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Microchip Technology 1N4134UR/TR
- Part No.:
- 1N4134UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4134UR/TR.pdf
- Description:
- DIODE ZENER 91V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,352
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Product details
Overview
1N4134UR/TR from Microsemi is a glass-encapsulated, surface-mount Zener diode in DO-213AA (SOD-80/MELF) package, rated for 0.5 W steady-state power dissipation, with nominal Zener voltage of 91 V ±5%, 250 mA test current, and 1200 Ω maximum Zener impedance at 25 °C. It operates across -65 °C to +175 °C and serves as a precision voltage reference in high-reliability power supply regulation and overvoltage protection circuits.
For engineers reviewing the 1N4134UR/TR datasheet, 1N4134UR/TR pinout, 1N4134UR/TR application, or 1N4134UR/TR equivalent, this page delivers verified electrical parameters, thermal derating behavior, RoHS-compliant packaging details, and validated alternative parts for voltage reference design in aerospace, industrial control, and test equipment where hermetic sealing and radiation hardness are required.
Technical Context
This device functions as a two-terminal, reverse-biased voltage regulator with cathode band marking polarity. Its Zener breakdown mechanism provides stable regulation over wide current (250 μA to 40 mA) and temperature (-65 °C to +175 °C) ranges, supported by low noise density (1 μV/√Hz typical) and minimal capacitance (4.2 pF at 91 V).
The DO-213AA glass MELF package enables hermetic sealing and inherent radiation hardness per MicroNote 050, while its metallurgical bond construction (optional with "-1" suffix) supports military-grade reliability. Thermal resistance is 150 °C/W junction-to-end-cap and 300 °C/W junction-to-ambient on FR4 with 1 oz Cu.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 91 V ±5% at 250 mA test current - defines precise regulation point for high-voltage reference circuits |
| Power Dissipation | 0.5 W at end-cap temperature < 100 °C - limits continuous thermal load without forced cooling |
| Zener Impedance | 1200 Ω max at 250 mA - determines output voltage stability under dynamic load changes |
| Reverse Current | 0.01 μA max at 72.8 V - ensures minimal leakage in high-impedance bias networks |
| Noise Density | 1 μV/√Hz typical at 25 °C - critical for low-noise analog references and precision instrumentation |
| Operating Temperature | -65 °C to +175 °C - supports deployment in extreme environments including downhole and avionics |
| Capacitance | 4.2 pF typical at 91 V - enables fast transient response and minimal signal coupling in RF-adjacent designs |
Pinout & Package
Hermetically sealed glass DO-213AA (SOD-80 / MELF) package with axial symmetry and cathode band marking; no discrete pins-device has two metallized end caps forming anode and cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode Band End | Zener Cathode | Connected to higher potential during regulation; band identifies polarity for correct orientation in PCB layout |
| Opposite End | Zener Anode | Connected to lower potential; reverse-biased operation requires cathode > anode for conduction |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic Glass Encapsulation | Prevents moisture ingress and long-term parameter drift in humid or corrosive environments |
| Radiation Hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for space and nuclear applications |
| ESD Robustness | Nonsensitive to ESD per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling |
| Tight Tolerance Options | ±2% (C suffix) and ±1% (D suffix) available - enables high-accuracy voltage references without trimming |
| RoHS Compliance | e3 suffix denotes annealed matte-tin plating - meets lead-free assembly requirements without solderability compromise |
Applications
| High-Voltage Power Supply Regulation | Aerospace Voltage Reference |
|---|---|
Use Scenario: Stabilizing feedback node in isolated DC-DC converters operating above 60 V output. IC Role / Device Role / Timing Role: Two-terminal Zener reference providing stable 91 V reference for error amplifier input. Use Value: Maintains ±5% regulation accuracy across -55 °C to +125 °C ambient, enabling reliable converter operation without active compensation. |
Use Scenario: Providing primary voltage reference in satellite power management units exposed to total ionizing dose. IC Role / Device Role / Timing Role: Radiation-hardened passive reference replacing less robust IC-based solutions. Use Value: Delivers stable 91 V reference with no parametric shift after 100 krad(Si), eliminating recalibration cycles. |
| Industrial Overvoltage Protection | Test & Measurement Calibration |
Use Scenario: Clamping transient surges on 75 V rail in motor drive gate driver circuits. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing energy during IGBT switching spikes. Use Value: Low 4.2 pF capacitance avoids signal distortion; 0.5 W rating sustains repeated 100 ns transients up to 1 A peak. |
Use Scenario: Serving as traceable calibration standard in portable multimeters requiring NIST-traceable 91 V reference. IC Role / Device Role / Timing Role: Primary Zener reference in self-calibrating ADC front-end circuitry. Use Value: 1 μV/√Hz noise density and <0.01 μA leakage ensure sub-0.01% measurement uncertainty over 10-year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C91,115 (Nexperia) | Surface-mount SOT-23 package; 350 mW rating; ±5% tolerance; 900 Ω Zz; 100 °C max junction temp | Limited to commercial temperature range; not hermetically sealed or radiation-hardened | Select for cost-sensitive consumer electronics where extended temperature and radiation immunity are not required |
| 1N4749A (ON Semiconductor) | Through-hole DO-41 package; 1 W rating; ±5% tolerance; 150 Ω Zz; 200 mA IZT; -65 °C to +200 °C | Higher power but axial-leaded; incompatible with automated SMT placement; larger footprint | Select when board-level repairability, higher surge capability, or legacy through-hole compatibility is prioritized |
Compared with BZX84-C91,115 and 1N4749A, the 1N4134UR/TR uniquely combines SMT compatibility, hermetic DO-213AA packaging, radiation hardness, and extended temperature operation - making it irreplaceable in mission-critical systems where reliability outweighs cost or power scaling.
Availability
1N4134UR/TR is available at Aetrix Electronics and suitable for high-reliability power supply regulation, aerospace voltage reference, and industrial overvoltage protection requiring stable component supply across extended temperature and radiation-exposed environments.
Supply support for 1N4134UR/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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and high-voltage analog components for defense, aerospace, and industrial markets.
The 1N4134UR/TR belongs to Microsemi's legacy DO-213AA glass Zener family, engineered for applications demanding hermetic sealing, extreme temperature resilience, and intrinsic radiation tolerance - particularly in downhole tools, satellite subsystems, and nuclear instrumentation.
FAQ
What is the Zener voltage tolerance for 1N4134UR/TR?
The 1N4134UR/TR has a nominal Zener voltage of 91 V with a standard tolerance of ±5%, as specified in the Microsemi datasheet. Tighter tolerances of ±2% (with C suffix) and ±1% (with D suffix) are available for enhanced precision applications, but the base 1N4134UR/TR part uses the standard 5% tolerance.
Does 1N4134UR/TR require heatsinking in typical PCB layouts?
No additional heatsinking is required for the 1N4134UR/TR under standard conditions: it dissipates up to 0.5 W at end-cap temperature <100 °C or ambient <25 °C on FR4 with 1 oz Cu. Derating begins above those temperatures per Figure 2 in the datasheet, but typical operation at ≤300 mW does not necessitate external thermal management.
Is 1N4134UR/TR compatible with lead-free reflow processes?
Yes - the 1N4134UR/TR is RoHS compliant (e3 suffix) and qualified for lead-free reflow with peak solder temperature of 260 °C for 10 seconds maximum, per MIL-STD-750 Method 2026. Its annealed matte-tin plating ensures reliable wetting and intermetallic formation during Pb-free assembly.
How is polarity identified on the 1N4134UR/TR package?
The 1N4134UR/TR uses a single cathode band marking on the glass body to indicate polarity. During Zener regulation, the banded end must be held at a higher potential than the opposite end - i.e., the band marks the cathode terminal, consistent with standard Zener diode convention.
What is the maximum reverse leakage current for 1N4134UR/TR at rated voltage?
At 72.8 V (80% of nominal 91 V), the 1N4134UR/TR exhibits a maximum reverse leakage current of 0.01 μA, as confirmed in the Electrical Characteristics table on page 2 of the Microsemi datasheet. This ultra-low leakage supports high-impedance biasing and precision reference applications.
1N4134UR/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N4134UR/TR FAQ
1.How can I place an order for 1N4134UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4134UR/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 1N4134UR/TR reliable?
The price and inventory of 1N4134UR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4134UR/TR is usually 5 days.
3.What payment methods are accepted for 1N4134UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4134UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4134UR/TR?
1N4134UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4134UR/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 1N4134UR/TR?
For technical support, including 1N4134UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4134UR/TR requirements.
6.How does Aetrix verify that 1N4134UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N4134UR/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 1N4134UR/TR meets industry standards.
7.What is the process for return or replacement of 1N4134UR/TR?
All 1N4134UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4134UR/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 1N4134UR/TR part is unused and in its original packaging.
Return procedure for 1N4134UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4134UR/TR Tags
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