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Microchip Technology JANS1N4129-1/TR
- Part No.:
- JANS1N4129-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4129-1/TR.pdf
- Description:
- DIODE ZENER 62V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:7,247
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Product details
Overview
JANS1N4129-1/TR from Microsemi is a 62 V, 500 mW metallurgically bonded glass Zener diode in DO-35 axial package, qualified to JANS level per MIL-PRF-19500/435, with 1% Zener voltage tolerance, 500 Ω max dynamic impedance at 250 mA test current, and ≤0.01 µA reverse leakage at 47.1 V, used for precision voltage regulation in radiation-hardened military power supplies.
For engineers reviewing the JANS1N4129-1/TR datasheet, JANS1N4129-1/TR pinout, JANS1N4129-1/TR application, or JANS1N4129-1/TR equivalent, key selection criteria include JANS-level reliability qualification, 62 V nominal Zener voltage with ±1% tolerance, low noise density (≤1 µV/√Hz), hermetic DO-35 packaging, and thermal derating behavior from 500 mW at 25 °C to zero at 175 °C.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased breakdown mode, with cathode band marking polarity. Its metallurgical bond construction ensures stable Zener voltage under thermal cycling and radiation exposure, supporting operation across –65 °C to +175 °C junction temperature range.
The 62 V nominal Zener voltage exhibits a +0.100 %/°C temperature coefficient, enabling predictable drift compensation in high-temperature analog circuits. Dynamic impedance of ≤500 Ω at IZT = 250 mA ensures minimal regulation error under load variation, while ≤0.01 µA reverse leakage at VR = 47.1 V confirms tight low-current stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 62 V ±1% at 250 mA - enables precise 62 V rail regulation with minimal calibration overhead |
| Power Dissipation | 500 mW @ TC = 25 °C - supports continuous regulation in compact through-hole layouts with defined thermal derating |
| Dynamic Impedance ZZT | ≤500 Ω @ 250 mA - limits output voltage shift to <156 mV under ±50 mA load change |
| Reverse Leakage IR | ≤0.01 µA @ 47.1 V - ensures negligible quiescent current in standby-mode reference circuits |
| Noise Density ND | ≤1 µV/√Hz - critical for low-noise analog references in instrumentation and telemetry front-ends |
| Temp Coefficient αVZ | +0.100 %/°C - allows accurate high-temp drift modeling in aerospace power monitoring |
| Junction Temp Range | –65 °C to +175 °C - validated for extended-range operation in avionics and space-grade systems |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package; cathode indicated by single black band; leads tinned or RoHS-compliant matte tin (commercial only); weight ≈0.2 g; body diameter 1.42–2.29 mm, length 3.56–5.08 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or common return; defines 0 V reference point for Zener regulation |
| Cathode | Regulated output node | Banded end; supplies stable 62 V when reverse-biased; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Radiation hardness | Inherently radiation-hard per Microsemi MicroNote 050 - eliminates need for external shielding in LEO/Satcom systems |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - withstands handling without protection circuitry |
| Hermetic sealing | DO-35 glass package - prevents moisture ingress and parameter drift over 20+ year field life |
| Low capacitance | Typical <2 pF (per Figure 3) - preserves high-frequency stability in RF bias networks and fast-switching regulators |
| MIL-qualified reliability | JANS level per MIL-PRF-19500/435 - certified for Class S (space) and Class H (high-reliability) applications |
Applications
| Avionics Power Monitoring | Satellite Bus Voltage Reference |
|---|---|
Use Scenario: Real-time monitoring of 28 V DC bus voltage in flight control computers using ratiometric ADCs. IC Role / Device Role / Timing Role: Precision 62 V Zener reference for ADC voltage scaling and fault threshold generation. Use Value: ±1% VZ tolerance and +0.100 %/°C TC enable <±0.3% total error over –55 °C to +125 °C operating range. | Use Scenario: Stable bias voltage for radiation-tolerant op-amps in satellite telemetry signal conditioning. IC Role / Device Role / Timing Role: Low-noise (≤1 µV/√Hz), radiation-hardened voltage reference source. Use Value: Hermetic DO-35 package and metallurgical bond ensure parametric stability after 100 krad(Si) TID exposure. |
| Tactical Radio RF Bias Network | Nuclear Instrumentation Calibration |
Use Scenario: Providing regulated gate bias to GaN PA stages in manpack radios operating across desert and arctic environments. IC Role / Device Role / Timing Role: High-temperature-stable Zener regulator in RF amplifier bias chain. Use Value: Operation up to +175 °C junction temperature allows direct PCB mounting near power amplifiers without heatsinking. | Use Scenario: Primary voltage standard in portable gamma spectrometer calibrators requiring traceable 62 V reference. IC Role / Device Role / Timing Role: Primary Zener reference in NIST-traceable calibration hardware. Use Value: JANS qualification and 1% tolerance meet ANSI N42.14 requirements for nuclear measurement equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4129-1 | Same 62 V ±1%, DO-35, but qualified only to JANTXV level (not JANS); higher allowable failure rate per MIL-PRF-19500/435 | Approved for airborne but not spaceflight or nuclear instrumentation use | Select when JANS-level radiation hardness or Class S certification is not required |
| 1N4129US-1 | Same electrical specs, but in surface-mount DO-213AA package; no axial leads; RoHS-compliant plating only | Used where automated assembly or board space constraints prohibit axial components | Select for high-volume commercial or industrial designs needing SMT compatibility |
Compared with JANS1N4129-1/TR, JANTXV1N4129-1 offers lower cost and faster lead time but lacks JANS radiation assurance, while 1N4129US-1 enables PCB area reduction and reflow assembly at the expense of manual repairability and legacy through-hole compatibility.
Availability
JANS1N4129-1/TR is available at Aetrix Electronics and suitable for avionics power monitoring, satellite bus voltage reference, and nuclear instrumentation calibration requiring stable component supply, long-term obsolescence management, and full MIL-spec traceability.
Supply support for JANS1N4129-1/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) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and defense-grade analog and mixed-signal components.
The JANS1N4129-1/TR belongs to Microsemi's MIL-PRF-19500/435-qualified Zener diode family, designed specifically for precision voltage regulation in mission-critical aerospace, defense, and nuclear systems where long-term parametric stability and environmental survivability are mandatory.
FAQ
What is the Zener voltage tolerance and test current for JANS1N4129-1/TR?
JANS1N4129-1/TR has a nominal Zener voltage of 62 V with ±1% tolerance, measured at a Zener test current (IZT) of 250 mA. This tight tolerance is maintained under thermal equilibrium at 25 °C ambient, and the device is rated for stable operation across its full –65 °C to +175 °C junction temperature range.
Is JANS1N4129-1/TR compatible with lead-free soldering processes?
JANS1N4129-1/TR is qualified for soldering at 260 °C for 10 seconds, meeting standard lead-free reflow profiles. Its DO-35 glass package and metallurgically bonded structure remain intact under these conditions, though hand-soldering requires strict thermal management to avoid thermal shock cracking.
Does JANS1N4129-1/TR require external heat sinking in typical applications?
JANS1N4129-1/TR does not require external heat sinking at 500 mW dissipation if mounted on FR4 with 4 mm² copper pads and 1 mm wide, 25 mm long traces. Its RθJL = 250 °C/W allows safe operation up to +175 °C junction temperature, provided ambient and layout thermal resistance stays within derating curves shown in Figure 2.
How does the temperature coefficient affect regulation accuracy of JANS1N4129-1/TR?
JANS1N4129-1/TR has a temperature coefficient of +0.100 %/°C, meaning its Zener voltage increases by ~62 mV per °C rise. Over a –55 °C to +125 °C range, this contributes ±17.7 V drift, so system-level compensation or narrow ambient control is needed for sub-0.5% total regulation error.
What is the maximum reverse leakage current specification for JANS1N4129-1/TR?
JANS1N4129-1/TR specifies a maximum reverse leakage current (IR) of ≤0.01 µA at VR = 47.1 V. This ultra-low leakage ensures minimal loading on high-impedance reference nodes and supports battery-powered applications where standby current must remain below 100 nA.
JANS1N4129-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- 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 (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/435
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
JANS1N4129-1/TR FAQ
1.How can I place an order for JANS1N4129-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4129-1/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 JANS1N4129-1/TR reliable?
The price and inventory of JANS1N4129-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4129-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4129-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4129-1/TR transactions.
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4.How is shipping managed for JANS1N4129-1/TR?
JANS1N4129-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4129-1/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 JANS1N4129-1/TR?
For technical support, including JANS1N4129-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4129-1/TR requirements.
6.How does Aetrix verify that JANS1N4129-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4129-1/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 JANS1N4129-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4129-1/TR?
All JANS1N4129-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4129-1/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 JANS1N4129-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4129-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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