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Microchip Technology JANS1N4129C-1/TR
- Part No.:
- JANS1N4129C-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4129C-1/TR.pdf
- Description:
- DIODE ZENER 62V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,012
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Product details
Overview
JANS1N4129C-1/TR from Microsemi is a 62 V, 500 mW metallurgically bonded glass Zener diode in DO-35 (DO-204AH) package, qualified to JANS level per MIL-PRF-19500/435, with ±2% Zener voltage tolerance, 500 Ω maximum dynamic impedance at 250 mA test current, and 40 µV/√Hz max noise density - used for precision voltage regulation in radiation-hardened aerospace power supplies.
For engineers reviewing the JANS1N4129C-1/TR datasheet, JANS1N4129C-1/TR pinout, JANS1N4129C-1/TR application, or JANS1N4129C-1/TR equivalent, key selection criteria include MIL-qualified reliability level (JANS), 62 V nominal Zener voltage with 2% tolerance, DO-35 axial-leaded hermetic packaging, thermal resistance of 250 °C/W junction-to-lead, and low-noise performance critical for analog reference circuits.
Technical Context
This device operates as a reverse-biased Zener regulator with cathode band marking polarity, requiring banded end positive relative to anode for regulation. Its metallurgical bond construction ensures stable breakdown characteristics across -65 °C to +175 °C junction temperature range and inherent radiation hardness per Microsemi MicroNote 050.
It delivers regulated voltage over broad current ranges (IZK to IZM = 47.1 mA max) with temperature coefficient of +0.100 %/°C and minimal capacitance (typical <2 pF at 62 V), supporting stable reference generation in high-reliability analog signal chains where low noise and long-term parametric stability are mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 62 V @ 250 mA - defines precise regulation point for biasing or reference circuits |
| Zener Voltage Tolerance | ±2% - tighter than standard 5%, enabling higher accuracy voltage references |
| Power Dissipation | 500 mW @ TC = 25 °C - supports moderate-power regulation without heatsinking |
| Dynamic Impedance | 500 Ω max @ IZT = 250 mA - determines output impedance and load regulation sensitivity |
| Noise Density | 40 µV/√Hz max @ IZT - critical for low-noise analog references and precision instrumentation |
| Temperature Coefficient | +0.100 %/°C - quantifies drift rate with ambient change; enables thermal compensation design |
| Junction Temperature Range | -65 °C to +175 °C - enables operation in extreme environments including space and military platforms |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package with tin-lead or RoHS-compliant matte-tin plating; cathode indicated by color band; weight ≈ 0.2 g; lead length 1.0–1.5 inches (25.4–38.1 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias reference return node | Connected to system ground or lowest potential point in Zener regulation circuit |
| Cathode (banded end) | Zener regulation output terminal | Provides stable 62 V reference when biased positively relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANS qualification | Meets highest reliability level for spaceflight and nuclear-hardened systems |
| Metallurgical bond construction | Ensures long-term parametric stability and reduced aging drift under thermal cycling |
| Low noise density (≤40 µV/√Hz) | Enables use in high-fidelity analog references without added filtering |
| Hermetic glass DO-35 package | Prevents moisture ingress and maintains electrical integrity over 20+ year lifetimes |
| Radiation hardness (per MicroNote 050) | Supports operation in total ionizing dose (TID) environments up to 100 krad(Si) |
Applications
| Spacecraft Power Reference | Aerospace Avionics Biasing |
|---|---|
Use Scenario: Providing stable 62 V reference for DC-DC converter feedback loops in satellite power management units. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precise regulation threshold for error amplifiers. Use Value: JANS-level qualification and radiation hardness ensure uninterrupted operation in LEO/GEO orbits with >100 krad(Si) TID exposure. | Use Scenario: Biasing high-voltage op-amps and comparators in flight control computer analog front-ends. IC Role / Device Role / Timing Role: Precision shunt regulator supplying clean reference to analog signal conditioning stages. Use Value: ±2% tolerance and 40 µV/√Hz noise density maintain ADC input accuracy despite EMI and thermal gradients. |
| Military Radar Power Supply | Nuclear Instrumentation Calibration |
Use Scenario: Stabilizing high-voltage rails in pulsed radar transmitter modulator stages operating at 60–65 V. IC Role / Device Role / Timing Role: Shunt regulator clamping transient overvoltage while maintaining steady-state reference. Use Value: 500 mW power rating and 250 °C/W junction-to-lead thermal resistance allow reliable operation without forced cooling. | Use Scenario: Serving as traceable voltage standard in portable radiation survey meter calibration fixtures. IC Role / Device Role / Timing Role: Primary Zener reference element in NIST-traceable calibration chain. Use Value: Hermetic DO-35 packaging and metallurgical bond ensure calibration stability over decades of field use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4129US-1/TR | Same 62 V Zener voltage and JANS qualification, but in surface-mount DO-213AA package | Requires PCB re-layout for SMT assembly; no axial through-hole mounting | Select when automated assembly and board space reduction are priorities over legacy through-hole compatibility |
| JANTXV1N4129C-1/TR | Identical electrical specs and DO-35 package, but qualified only to JANTXV (not JANS) per MIL-PRF-19500/435 | Lower radiation hardness margin and reduced screening for space-grade missions | Select for high-reliability ground-based or airborne systems where full JANS qualification is not mandated |
Compared with JANS1N4129C-1/TR, the 1N4129US-1/TR offers identical regulation performance in a compact SMT form factor, while the JANTXV1N4129C-1/TR provides cost-effective access to the same Zener characteristics with slightly relaxed reliability screening - both require explicit validation for radiation or extended-temperature mission profiles.
Availability
JANS1N4129C-1/TR is available at Aetrix Electronics and suitable for spacecraft power reference, aerospace avionics biasing, and military radar power supply applications requiring stable component supply with guaranteed traceability and long-term obsolescence management.
Supply support for JANS1N4129C-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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The JANS1N4129C-1/TR belongs to Microsemi's MIL-qualified Zener diode family engineered for precision voltage regulation in radiation-intensive, high-temperature, and long-lifetime systems.
FAQ
What is the Zener voltage tolerance of JANS1N4129C-1/TR?
JANS1N4129C-1/TR has a ±2% Zener voltage tolerance at 250 mA test current, as indicated by the "C" suffix in its nomenclature per Microsemi's part numbering convention. This tighter tolerance enables higher-accuracy voltage references compared to standard ±5% variants like JANS1N4129-1/TR, and is verified in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1.
Is JANS1N4129C-1/TR suitable for radiation-hardened applications?
Yes, JANS1N4129C-1/TR is inherently radiation hard per Microsemi MicroNote 050 and qualified to JANS level per MIL-PRF-19500/435, making it suitable for total ionizing dose (TID) environments up to 100 krad(Si). Its metallurgically bonded construction and hermetic DO-35 package contribute to this radiation resilience, confirmed in the Applications/Benefits section of the datasheet.
What is the maximum Zener current for JANS1N4129C-1/TR?
The maximum Zener current (IZM) for JANS1N4129C-1/TR is 47.1 mA at 25 °C, derived from its 500 mW power rating and 62 V nominal Zener voltage (IZM = PM(AV)/VZ ≈ 500 mW / 62 V). This value is explicitly listed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1.
Does JANS1N4129C-1/TR have low-noise performance?
Yes, JANS1N4129C-1/TR exhibits low-noise performance with a maximum noise density of 40 µV/√Hz at 250 mA test current and 25 °C, as specified in the Electrical Characteristics table. This performance is typical for Zener diodes ≥6.8 V and supports use in precision analog references where spectral purity is critical.
What package type does JANS1N4129C-1/TR use?
JANS1N4129C-1/TR uses the DO-35 (DO-204AH) axial-leaded, hermetically sealed glass package with cathode indicated by a band. Mechanical dimensions, plating details (tin-lead or RoHS matte-tin), and weight (~0.2 g) are documented in the Mechanical and Packaging section on page 2 of T4-LDS-0245-2 Rev. 1.
JANS1N4129C-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:
- ±2%
- 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)
JANS1N4129C-1/TR FAQ
1.How can I place an order for JANS1N4129C-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4129C-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 JANS1N4129C-1/TR reliable?
The price and inventory of JANS1N4129C-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 JANS1N4129C-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4129C-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4129C-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4129C-1/TR?
JANS1N4129C-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4129C-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 JANS1N4129C-1/TR?
For technical support, including JANS1N4129C-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4129C-1/TR requirements.
6.How does Aetrix verify that JANS1N4129C-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4129C-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 JANS1N4129C-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4129C-1/TR?
All JANS1N4129C-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4129C-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 JANS1N4129C-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4129C-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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