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Microchip Technology 1N4129UR/TR
- Part No.:
- 1N4129UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4129UR/TR.pdf
- Description:
- DIODE ZENER 62V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,967
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Product details
Overview
1N4129UR/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 62 V ±5%, Zener test current 250 μA, and maximum Zener impedance 500 Ω at IZT. It regulates voltage in precision reference and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N4129UR/TR datasheet, 1N4129UR/TR pinout, 1N4129UR/TR application, or 1N4129UR/TR equivalent, key selection criteria include its 62 V regulation level, low noise density (1 μV/√Hz), hermetic glass package, -65°C to +175°C operating range, and RoHS-compliant e3 marking with TR tape-and-reel packaging.
Technical Context
This device operates as a reverse-biased voltage reference, maintaining stable 62 V output across load current variations from 1 μA to 40 mA. Its Zener impedance of 500 Ω at 250 μA ensures predictable dynamic response under transient conditions.
Designed for high-reliability environments, it features inherent radiation hardness per MicroNote 050, nonsensitivity to ESD per MIL-STD-750 Method 1020, and thermal resistance of 150°C/W junction-to-end-cap - enabling operation up to 175°C ambient when properly mounted on FR4 with recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 62 V ±5% at 250 μA - defines primary regulation point for precision biasing and clamping |
| Steady-State Power Dissipation | 0.5 W at TEC < 100°C - limits continuous thermal stress in compact SMT layouts |
| Zener Impedance | 500 Ω max at IZT = 250 μA - determines AC regulation stability under varying load currents |
| Maximum Reverse Current | 10 nA at VR = 47.1 V - ensures minimal leakage in high-impedance reference nodes |
| Noise Density | 1 μV/√Hz typical at IZT - supports low-noise analog references in instrumentation |
| Operating Temperature Range | -65°C to +175°C - enables deployment in aerospace, downhole, and military systems |
| Package | DO-213AA (SOD-80/MELF) glass body - provides hermetic sealing and superior thermal cycling reliability |
Pinout & Package
Hermetically sealed glass DO-213AA (SOD-80/MELF) package with axial symmetry and cathode band marking. Polarity: banded end is cathode; device operates with cathode positive relative to anode during Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection point | Applied positive voltage relative to anode to enable reverse breakdown regulation at 62 V |
| Anode (unbanded end) | Zener cathode connection point | Reference ground or return path; reverse current flows from cathode to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in harsh environments |
| Low noise density (1 μV/√Hz) | Enables use in high-resolution ADC references and precision analog front-ends |
| Radiation-hardened design | Validated per Microsemi MicroNote 050 for total ionizing dose tolerance in space applications |
| ESD immunity per MIL-STD-750 Method 1020 | Withstands handling and assembly without external protection circuitry |
| e3 RoHS-compliant plating | Tin-Lead (Sn/Pb) or matte-tin finish compatible with standard reflow profiles and legacy soldering |
Applications
| Industrial Power Supply Monitoring | Aerospace Voltage Reference |
|---|---|
Use Scenario: Monitoring 72 V DC bus in rail traction inverters to trigger overvoltage shutdown before capacitor failure. IC Role / Device Role / Timing Role: Zener diode acting as precision 62 V shunt reference for comparator input threshold. Use Value: Stable 62 V regulation across -40°C to +125°C ensures consistent trip point without calibration drift. | Use Scenario: Providing stable bias voltage for radiation-tolerant op-amps in satellite telemetry conditioning circuits. IC Role / Device Role / Timing Role: Primary voltage reference element in low-power analog signal chain requiring long-term stability. Use Value: Inherent radiation hardness and 1 μV/√Hz noise support mission-critical accuracy over 15-year orbital lifetime. |
| Downhole Oilfield Sensor Biasing | Military Avionics Overvoltage Protection |
Use Scenario: Biasing piezoresistive pressure transducers in borehole tools exposed to 175°C ambient and H2S gas. IC Role / Device Role / Timing Role: Zener regulator establishing fixed excitation voltage for Wheatstone bridge sensors. Use Value: DO-213AA glass package withstands thermal cycling and chemical exposure while maintaining ±5% VZ tolerance. | Use Scenario: Clamping 28 V aircraft bus transients to protect FPGAs and microcontrollers during lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing surge energy above 62 V threshold. Use Value: 0.5 W rating and 500 Ω ZZT allow controlled clamping without thermal runaway under repetitive 100 ns spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4748A-T | 62 V ±5%, 1 W power rating, DO-41 axial package, higher ZZT (700 Ω) | Requires through-hole PCB layout; better suited for high-energy transient absorption | Select when higher surge power handling is needed and SMT is not required |
| BZX84-C62-7-F | 62 V ±5%, 300 mW, SOT-23 package, higher ZZT (1 kΩ), 100 nA IR at 47.1 V | Smaller footprint but lower thermal mass; limited to low-power portable electronics | Select when board space is constrained and 0.5 W derating is acceptable |
Compared with 1N4129UR/TR, 1N4748A-T offers higher surge capability but lacks hermetic sealing and radiation tolerance, while BZX84-C62-7-F reduces size at the cost of thermal robustness and noise performance - making 1N4129UR/TR optimal for high-reliability, high-temperature, low-noise Zener reference designs.
Availability
1N4129UR/TR is available at Aetrix Electronics and suitable for industrial power monitoring, aerospace voltage reference, and downhole sensor biasing requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4129UR/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-temperature analog and mixed-signal components.
The 1N4129UR/TR belongs to Microsemi's legacy DO-213AA glass Zener series, engineered for precision voltage regulation in mission-critical aerospace, defense, oilfield, and industrial control systems where long-term stability and environmental resilience are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4129UR/TR?
The 1N4129UR/TR has a nominal Zener voltage of 62 V with a standard tolerance of ±5%, as specified in the Microsemi datasheet. No suffix indicates this default tolerance; tighter tolerances (±2% or ±1%) require C or D suffixes respectively, which are not present in the 1N4129UR/TR part number.
Does 1N4129UR/TR support RoHS compliance?
Yes, the "e3" suffix in 1N4129UR/TR confirms RoHS compliance per EU Directive 2011/65/EU. The device uses annealed matte-tin plating on end caps, solderable per MIL-STD-750 Method 2026, and meets lead-free assembly requirements including peak reflow at 260°C for 10 seconds.
What is the maximum reverse leakage current for 1N4129UR/TR at rated voltage?
At VR = 47.1 V (75% of nominal 62 V), the 1N4129UR/TR exhibits a maximum reverse current of 10 nA. This ultra-low leakage supports high-impedance reference node stability in battery-powered and precision analog circuits.
Can 1N4129UR/TR be used in radiation-intensive environments?
Yes, the 1N4129UR/TR is inherently radiation-hardened per Microsemi MicroNote 050, validated for total ionizing dose (TID) tolerance without parameter degradation - making it suitable for satellite, nuclear instrumentation, and high-altitude avionics where single-event effects must be minimized.
What is the thermal resistance specification for 1N4129UR/TR?
The 1N4129UR/TR has a thermal resistance of 150°C/W junction-to-end-cap and 300°C/W junction-to-ambient when mounted on FR4 with 1 oz copper and the recommended footprint. This allows safe operation up to 175°C ambient if end-cap temperature remains below 100°C.
1N4129UR/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):
- 62 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 500 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 47.1 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
1N4129UR/TR FAQ
1.How can I place an order for 1N4129UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4129UR/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 1N4129UR/TR reliable?
The price and inventory of 1N4129UR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4129UR/TR is usually 5 days.
3.What payment methods are accepted for 1N4129UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4129UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4129UR/TR?
1N4129UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4129UR/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 1N4129UR/TR?
For technical support, including 1N4129UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4129UR/TR requirements.
6.How does Aetrix verify that 1N4129UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N4129UR/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 1N4129UR/TR meets industry standards.
7.What is the process for return or replacement of 1N4129UR/TR?
All 1N4129UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4129UR/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 1N4129UR/TR part is unused and in its original packaging.
Return procedure for 1N4129UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4129UR/TR Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
onsemi
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