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Microchip Technology JANS1N4125-1/TR
- Part No.:
- JANS1N4125-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4125-1/TR.pdf
- Description:
- DIODE ZENER 47V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:2,578
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Product details
Overview
JANS1N4125-1/TR from Microsemi is a 500 mW, 47 V, ±5% tolerance metallurgically bonded glass Zener diode in DO-35 (DO-204AH) axial-leaded package, qualified to JANS level per MIL-PRF-19500/435 for high-reliability aerospace and defense applications. It delivers stable voltage regulation at 250 mA test current with 250 Ω dynamic impedance and operates across –65 °C to +175 °C junction temperature range.
For engineers reviewing the JANS1N4125-1/TR datasheet, JANS1N4125-1/TR pinout, JANS1N4125-1/TR application, or JANS1N4125-1/TR equivalent, key selection criteria include its JANS-level radiation hardness, low noise density (≤1 µV/√Hz below 6.8 V), hermetic glass packaging, and 47 V nominal Zener voltage with 5% tolerance under MIL-qualified thermal and electrical stress conditions.
Technical Context
This device functions as a precision shunt voltage regulator in feedback loops and reference circuits where long-term stability under extreme environmental stress is required. Its internal metallurgical bond ensures mechanical integrity during thermal cycling and vibration, while the DO-35 glass package provides hermetic sealing essential for space-grade reliability.
The JANS1N4125-1/TR exhibits a positive temperature coefficient of +0.095 %/°C and maximum reverse leakage of 10 nA at 37.6 V, enabling predictable drift compensation in analog references. Its 250 mA Zener test current and 40 mW noise density specification support low-noise biasing in instrumentation amplifiers and sensor excitation circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 47 V ±5% at 250 mA - defines regulated output voltage with tight tolerance for reference accuracy |
| Power Dissipation | 500 mW @ 25 °C - supports continuous operation in compact, unheatsinked designs |
| Dynamic Impedance ZZT | 250 Ω @ 250 mA - determines load regulation error under varying current demand |
| Reverse Leakage IR | 10 nA @ 37.6 V - ensures minimal parasitic current in high-impedance reference nodes |
| Temp Coefficient αVZ | +0.095 %/°C - enables predictable voltage drift compensation over –65 °C to +175 °C |
| Noise Density ND | ≤1 µV/√Hz - critical for low-noise analog signal chains and precision ADC references |
| Junction Temp Range | –65 °C to +175 °C - qualifies for operation in missile guidance, satellite power, and downhole electronics |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package with cathode indicated by band; operated with banded end positive for Zener regulation. Hermetically sealed, tin-lead plated leads solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference Ground Node | Connected to system ground or low-impedance return path; establishes reference potential |
| Cathode | Zener Output Terminal | Delivers regulated 47 V output; must be biased positive relative to anode for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANS qualification | Meets full screening, burn-in, and radiation hardness requirements for spaceflight and nuclear-hardened systems |
| Metallurgical bond construction | Prevents interfacial delamination under thermal shock and mechanical vibration up to 20 g RMS |
| Hermetic glass DO-35 package | Eliminates moisture ingress and long-term parameter drift in humid or corrosive environments |
| Low noise density ≤1 µV/√Hz | Enables use in precision analog front-ends without requiring external filtering or averaging |
| Non-ESD-sensitive design | Withstands >4 kV HBM per MIL-STD-750 method 1020 without parameter shift or failure |
Applications
| Avionics Power Reference | Satellite Voltage Monitor |
|---|---|
Use Scenario: Provides stable 47 V reference for DC-DC converter feedback in airborne radar power supplies. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing precise output setpoint for isolated flyback controller. Use Value: JANS qualification ensures uninterrupted operation during rapid altitude-induced thermal transients and ionizing radiation exposure. | Use Scenario: Serves as overvoltage detection threshold in satellite bus protection circuitry. IC Role / Device Role / Timing Role: Zener clamp triggering latch-off when primary bus exceeds 47 V ±5%. Use Value: Hermetic DO-35 package prevents parametric drift in vacuum and atomic oxygen environments over 15-year mission life. |
| Nuclear Instrumentation Bias | Missile Guidance Sensor Excitation |
Use Scenario: Supplies bias voltage to radiation-hardened photomultiplier tube anode stacks in reactor monitoring systems. IC Role / Device Role / Timing Role: High-stability shunt reference maintaining constant gain across wide temperature swings. Use Value: +0.095 %/°C tempco allows predictable calibration offset correction in firmware without hardware trimming. | Use Scenario: Excites piezoresistive accelerometers in inertial measurement units during launch-phase vibration. IC Role / Device Role / Timing Role: Low-noise 47 V source minimizing signal-to-noise degradation in analog sensor outputs. Use Value: ≤1 µV/√Hz noise density preserves resolution of sub-mg acceleration measurements under high-g shock. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4125-1 | Same 47 V Zener, JANTXV qualification (lower screening rigor than JANS); no radiation hardness data published | Approved for high-reliability ground-based military systems but not spaceflight or nuclear environments | Select when full JANS radiation testing is unnecessary and cost reduction is prioritized |
| 1N4125US-TR | Commercial-grade version; RoHS-compliant matte-tin plating; no MIL-qualification or radiation data | Limited to industrial or commercial avionics where extended temperature and radiation immunity are not required | Choose only for non-safety-critical prototyping or cost-sensitive terrestrial applications |
Compared with JANTXV1N4125-1 and 1N4125US-TR, the JANS1N4125-1/TR uniquely combines verified radiation hardness, full MIL-PRF-19500/435 JANS screening, and hermetic DO-35 packaging-making it the sole option for flight-critical voltage references in LEO satellites and strategic weapon systems.
Availability
JANS1N4125-1/TR is available at Aetrix Electronics and suitable for avionics power reference, satellite voltage monitor, and nuclear instrumentation bias applications requiring stable component supply across extended product lifecycles and rigorous environmental compliance.
Supply support for JANS1N4125-1/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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The JANS1N4125-1/TR belongs to Microsemi's legacy MIL-qualified Zener diode family designed specifically for radiation-tolerant voltage regulation in mission-critical systems operating under extreme thermal, mechanical, and ionizing radiation stress.
FAQ
What is the Zener voltage tolerance of JANS1N4125-1/TR?
The JANS1N4125-1/TR has a nominal Zener voltage of 47 V with a ±5% tolerance, as defined by JEDEC standard and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This tolerance applies at 250 mA test current and 25 °C ambient, and is maintained across the full JANS qualification screening process.
Is JANS1N4125-1/TR radiation hardened?
Yes, the JANS1N4125-1/TR is inherently radiation hard as documented in Microsemi MicroNote 050 and qualified to JANS level per MIL-PRF-19500/435. Its metallurgically bonded structure and hermetic DO-35 glass package provide proven total ionizing dose (TID) tolerance and single-event effect (SEE) immunity required for spaceflight applications.
What is the maximum reverse leakage current for JANS1N4125-1/TR?
The maximum reverse leakage current (IR) for JANS1N4125-1/TR is 10 nA at 37.6 V, as specified in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This value is measured at 25 °C and reflects the device's performance after full JANS-level screening and burn-in.
Does JANS1N4125-1/TR have RoHS compliance?
No, the JANS1N4125-1/TR is not RoHS compliant. Per the nomenclature guide on page 2 of T4-LDS-0245-2 Rev. 1, RoHS compliance (e3 suffix) is available only on commercial-grade versions. The JANS-level variant uses traditional tin-lead plating to meet MIL-STD-750 solderability requirements.
What is the thermal resistance junction-to-lead for JANS1N4125-1/TR?
The thermal resistance junction-to-lead (RθJL) for JANS1N4125-1/TR is 250 °C/W at 3/8 inch (10 mm) lead length from body, as stated in the Maximum Ratings table on page 1 of T4-LDS-0245-2 Rev. 1. This value assumes standard mounting on FR4 PCB with specified copper pad geometry.
JANS1N4125-1/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):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 250 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 35.8 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)
JANS1N4125-1/TR FAQ
1.How can I place an order for JANS1N4125-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4125-1/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 JANS1N4125-1/TR reliable?
The price and inventory of JANS1N4125-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4125-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4125-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4125-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4125-1/TR?
JANS1N4125-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4125-1/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 JANS1N4125-1/TR?
For technical support, including JANS1N4125-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4125-1/TR requirements.
6.How does Aetrix verify that JANS1N4125-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4125-1/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 JANS1N4125-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4125-1/TR?
All JANS1N4125-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4125-1/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 JANS1N4125-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4125-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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