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Microchip Technology JAN1N4125-1
- Part No.:
- JAN1N4125-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JAN1N4125-1.pdf
- Description:
- DIODE ZENER 47V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:37
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Product details
Overview
JAN1N4125-1 from Microsemi is a 500 mW, 47 V metallurgically bonded glass Zener diode in DO-35 package, qualified to JANS level per MIL-PRF-19500/435, with ±5% voltage tolerance, 250 mA Zener test current, and 250 Ω maximum dynamic impedance at IZT - used for precision voltage regulation in aerospace power conditioning circuits.
For engineers reviewing the JAN1N4125-1 datasheet, JAN1N4125-1 pinout, JAN1N4125-1 application, or JAN1N4125-1 equivalent, key selection criteria include Zener voltage stability over temperature (αVZ = +0.095 %/°C), low noise density (1 µV/√Hz), hermetic DO-35 packaging, and JANS-level radiation hardness for high-reliability embedded systems.
Technical Context
This device operates as a reverse-biased voltage reference with a nominal Zener voltage of 47 V at 250 mA test current, exhibiting a positive temperature coefficient (+0.095 %/°C) and 250 Ω dynamic impedance (ZZT) under standard test conditions. Its metallurgical bond construction ensures stable breakdown characteristics across thermal cycling.
Rated for 500 mW average power dissipation at 25 °C, it linearly derates to zero at 175 °C junction temperature and supports operation from –65 °C to +175 °C. Reverse leakage is limited to ≤0.01 µA at VR = 35.8 V, and forward voltage is 1.1 V at 200 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 47 V at 250 mA - defines precise regulation point for feedback loops in regulated DC supplies. |
| Power Dissipation PM(AV) | 500 mW at 25 °C - sets maximum continuous thermal load without forced cooling. |
| Dynamic Impedance ZZT | 250 Ω max at IZT - determines output voltage variation under load current changes. |
| Temperature Coefficient αVZ | +0.095 %/°C - quantifies voltage drift per degree, critical for wide-temperature-range designs. |
| Noise Density ND | 1 µV/√Hz - enables low-noise reference use in precision analog signal chains. |
| Reverse Leakage IR | ≤0.01 µA at 35.8 V - ensures minimal quiescent current in standby or low-power modes. |
| Junction Temp Range TJ | –65 °C to +175 °C - supports operation in extreme environments including space and military avionics. |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package; cathode indicated by band; banded end is anode when used in forward bias, but functions as cathode (positive terminal) during Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (banded end) | Zener cathode connection | Connected to higher potential node during regulation; polarity marking defines functional orientation. |
| Cathode (unbanded end) | Zener anode connection | Connected to lower potential node; reverse-bias configuration establishes breakdown conduction path. |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Ensures long-term parameter stability and resistance to thermal fatigue in cyclic environments. |
| JANS qualification per MIL-PRF-19500/435 | Validates performance for space-grade applications including radiation tolerance and burn-in screening. |
| Low noise density (1 µV/√Hz) | Supports use in high-fidelity reference circuits where voltage noise directly impacts ADC/DAC accuracy. |
| Hermetic glass sealing | Prevents moisture ingress and parameter shift over decades of field operation in harsh atmospheres. |
| Non-ESD-sensitive per MIL-STD-750 Method 1020 | Eliminates need for ESD handling protocols during assembly, reducing manufacturing risk. |
Applications
| Avionics Power Regulation | Satellite Bus Voltage Reference |
|---|---|
Use Scenario: Regulating 48 V bus-derived auxiliary rails in flight control computers. IC Role / Device Role / Timing Role: Zener diode providing stable 47 V reference for error amplifiers in isolated DC-DC converters. Use Value: Maintains ±0.5% output voltage accuracy across –55 °C to +125 °C ambient due to tight αVZ and hermetic reliability. | Use Scenario: Biasing photodiode amplifier stages in star tracker optical sensors. IC Role / Device Role / Timing Role: Low-noise voltage reference establishing DC operating point for transimpedance amplifiers. Use Value: 1 µV/√Hz noise density prevents signal-to-noise degradation in sub-picoamp photocurrent measurements. |
| Ground-Based Radar Bias Supply | Nuclear Instrumentation Channel Reference |
Use Scenario: Generating stable bias for GaN RF power amplifier gate drivers in phased-array radar transceivers. IC Role / Device Role / Timing Role: Precision Zener regulating gate voltage in high-voltage switching stages. Use Value: JANS qualification ensures immunity to neutron-induced parametric shifts during extended field deployment. | Use Scenario: Providing reference voltage for pulse-height analyzers in radiation detection systems. IC Role / Device Role / Timing Role: Radiation-hardened voltage standard for analog front-end calibration. Use Value: Inherent radiation hardness (per MicroNote 050) eliminates need for shielding or derating in high-dose environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4125US | Same 47 V rating and DO-35 package, but commercial-grade (non-mil-qualified); no JANS screening or radiation data. | Lacks MIL-PRF-19500/435 qualification; unsuitable for space or nuclear environments. | Select only for cost-sensitive terrestrial industrial use where radiation hardness and extended temp range are not required. |
| JANTXV1N4125 | Identical electrical specs and DO-35 package; qualified to JANTXV level (lower screening rigor than JANS). | Meets high-reliability requirements but not full space-grade radiation testing or burn-in. | Choose when JANS-level assurance is unnecessary but enhanced reliability over commercial grade is needed. |
Compared with JAN1N4125-1, 1N4125US offers identical regulation performance without military screening, while JANTXV1N4125 provides intermediate reliability assurance - both lack the full radiation hardness and lifetime validation inherent to the JANS-qualified JAN1N4125-1.
Availability
JAN1N4125-1 is available at Aetrix Electronics and suitable for avionics power regulation, satellite bus voltage reference, and ground-based radar bias supply requiring stable component supply across extended temperature ranges and radiation-exposed environments.
Supply support for JAN1N4125-1 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 JAN1N4125-1 belongs to Microsemi's legacy MIL-PRF-19500/435-qualified Zener diode family, designed specifically for voltage regulation in mission-critical systems demanding radiation hardness, hermetic sealing, and extended temperature operation.
FAQ
What is the Zener voltage tolerance for JAN1N4125-1?
JAN1N4125-1 has a nominal Zener voltage of 47 V with a standard ±5% tolerance, consistent with JEDEC registration for the 1N4099–1N4135 series. This tolerance applies at 25 °C with the diode in thermal equilibrium and is verified per MIL-PRF-19500/435 test procedures. The JAN1N4125-1 datasheet specifies no tighter tolerance option for this specific reliability level.
Is JAN1N4125-1 RoHS compliant?
No, JAN1N4125-1 is not RoHS compliant. RoHS-compliant versions (e.g., with "e3" suffix) are available only for commercial-grade variants per the datasheet; JAN-level parts retain tin-lead plating to meet MIL-STD-750 solderability requirements and are exempt from RoHS under defense procurement exceptions.
What is the maximum reverse leakage current for JAN1N4125-1?
JAN1N4125-1 has a maximum reverse leakage current (IR) of 0.01 µA at VR = 35.8 V, measured at 25 °C. This ultra-low leakage supports high-impedance reference applications and minimizes standby power loss in battery-backed systems using the JAN1N4125-1.
Does JAN1N4125-1 require heatsinking in typical applications?
No, JAN1N4125-1 does not require external heatsinking when operated within its 500 mW derated power envelope. Its thermal resistance junction-to-lead is 250 °C/W with 10 mm lead length, and junction-to-ambient is 300 °C/W on FR4 board - sufficient for most low-duty-cycle or moderate-current regulation tasks using the JAN1N4125-1.
How is polarity marked on JAN1N4125-1?
JAN1N4125-1 uses a single black band to indicate the cathode terminal. During Zener regulation, the banded end must be connected to the more positive potential - i.e., the band marks the cathode, not the anode. This marking convention is consistent across all DO-35-packaged devices in the JAN1N4125-1 family.
JAN1N4125-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- 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
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/435
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
JAN1N4125-1 FAQ
1.How can I place an order for JAN1N4125-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for JAN1N4125-1 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 JAN1N4125-1 reliable?
The price and inventory of JAN1N4125-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JAN1N4125-1 is usually 5 days.
3.What payment methods are accepted for JAN1N4125-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JAN1N4125-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JAN1N4125-1?
JAN1N4125-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JAN1N4125-1 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 JAN1N4125-1?
For technical support, including JAN1N4125-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JAN1N4125-1 requirements.
6.How does Aetrix verify that JAN1N4125-1 is sourced from the original manufacturer or authorized distributors?
All JAN1N4125-1 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 JAN1N4125-1 meets industry standards.
7.What is the process for return or replacement of JAN1N4125-1?
All JAN1N4125-1 units undergo pre-shipment inspection (PSI). If there is an issue with JAN1N4125-1, 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 JAN1N4125-1 part is unused and in its original packaging.
Return procedure for JAN1N4125-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JAN1N4125-1 Tags
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