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Microchip Technology JANTX1N4125D-1
- Part No.:
- JANTX1N4125D-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANTX1N4125D-1.pdf
- Description:
- DIODE ZENER 47V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:2,964
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Product details
Overview
JANTX1N4125D-1 from Microsemi is a 1% tolerance, 47 V, 500 mW metallurgically bonded glass Zener diode in DO-35 package, qualified to JANTX level per MIL-PRF-19500/435 for high-reliability voltage regulation in aerospace and defense power supplies.
For engineers reviewing the JANTX1N4125D-1 datasheet, JANTX1N4125D-1 pinout, JANTX1N4125D-1 application, or JANTX1N4125D-1 equivalent, key selection criteria include Zener voltage accuracy (±1%), low noise density (1 µV/√Hz), radiation hardness, and military-grade thermal derating behavior up to +175 °C junction temperature.
Technical Context
This device operates as a precision shunt voltage regulator with a nominal Zener voltage of 47 V at 250 mA test current, exhibiting a dynamic impedance of 250 Ω and temperature coefficient of +0.095 %/°C. Its metallurgical bond construction ensures stable breakdown characteristics under thermal cycling and radiation exposure.
Designed for operation in the reverse-biased breakdown region, it delivers regulated output with minimal capacitance (<1 pF typical at 47 V) and low leakage (≤10 nA at 37.6 V), supporting stable reference generation in analog signal chains and feedback loops of DC-DC converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 47 V ±1% at 250 mA - enables precise 47 V rail regulation with tight tolerance for mission-critical references. |
| Power Dissipation | 500 mW @ 25 °C, linearly derated to zero at 175 °C - supports robust thermal design in sealed enclosures. |
| Dynamic Impedance ZZT | 250 Ω @ 250 mA - ensures stable regulation under varying load current without excessive output drift. |
| Noise Density | 1 µV/√Hz @ 47 V - critical for low-noise analog references and precision instrumentation front-ends. |
| Reverse Leakage IR | ≤10 nA @ 37.6 V - minimizes error current in high-impedance bias networks and sensor interfaces. |
| Temp Coefficient αVZ | +0.095 %/°C - allows predictable voltage drift compensation in wide-temperature-range systems. |
| Junction Temp Range | –65 to +175 °C - validated for operation in extreme environments including space and avionics. |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package; cathode indicated by band; banded end is anode when used as Zener regulator (cathode connected to higher potential).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (banded end) | Reference ground node | Connected to system ground or lower-potential rail; defines Zener regulation polarity. |
| Cathode (non-banded end) | Regulated output node | Connected to input supply; maintains 47 V above anode when reverse-biased above knee voltage. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANTX qualification | Validated reliability for aerospace and defense programs requiring traceable lot data and screening. |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and mechanical stress. |
| 1% Zener voltage tolerance | Reduces need for external trimming in precision reference circuits. |
| Radiation hardness | Inherently resistant to total ionizing dose (TID), per Microsemi MicroNote 050. |
| Low capacitance | Typical <1 pF at 47 V - preserves high-frequency stability in fast-switching feedback paths. |
Applications
| Avionics Power Reference | Satellite DC-DC Feedback |
|---|---|
Use Scenario: Providing stable 47 V reference for analog-to-digital converter biasing in flight control computers. IC Role / Device Role / Timing Role: Shunt voltage reference regulating auxiliary supply rail. Use Value: ±1% tolerance and +0.095 %/°C TC enable calibrated ADC full-scale accuracy across –55 to +125 °C operating range. | Use Scenario: Setting output voltage of isolated flyback converter in LEO satellite power management unit. IC Role / Device Role / Timing Role: Primary-side Zener clamp defining secondary-side regulation setpoint via optocoupler feedback. Use Value: 1 µV/√Hz noise density prevents switching noise coupling into feedback path, maintaining <0.5% output regulation. |
| Nuclear Instrumentation | High-Temp Industrial Sensor |
Use Scenario: Biasing photomultiplier tube (PMT) dynode chain in radiation detection equipment. IC Role / Device Role / Timing Role: Precision high-voltage current source element. Use Value: Hermetic DO-35 package and –65 to +175 °C rating ensure long-term stability in gamma-rich environments. | Use Scenario: Generating stable reference for RTD signal conditioning in downhole oilfield electronics. IC Role / Device Role / Timing Role: Temperature-compensated shunt regulator in 150 °C ambient environment. Use Value: Linear derating from 500 mW at 25 °C to zero at 175 °C enables verified thermal margin without heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4125US-1 | Same electrical specs but in surface-mount DO-213AA package; no axial leads. | Required for automated SMT assembly; unsuitable for through-hole prototyping or high-vibration mechanical retention. | Select when board space is constrained and reflow compatibility is mandatory. |
| JANTXV1N4125D-1 | Identical electrical parameters with additional JANTXV-level screening (extended burn-in, parametric limits). | Required for Class H or Class K reliability programs where failure-in-time (FIT) rate must be <10 FIT. | Select when system-level reliability requirements exceed standard JANTX qualification. |
Compared with JANTX1N4125D-1, the 1N4125US-1 offers identical regulation performance in a compact SMT form factor, while JANTXV1N4125D-1 adds enhanced screening for ultra-high-reliability deployments-neither is pin-compatible due to differing packages or qualification scope.
Availability
JANTX1N4125D-1 is available at Aetrix Electronics and suitable for avionics power reference, satellite DC-DC feedback, and nuclear instrumentation requiring stable component supply with full MIL-spec traceability and lot-level documentation.
Supply support for JANTX1N4125D-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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The JANTX1N4125D-1 belongs to Microsemi's legacy MIL-qualified Zener diode family, engineered specifically for precision voltage regulation in harsh-environment systems where radiation tolerance, thermal stability, and long-term parametric consistency are mandatory.
FAQ
What is the Zener voltage tolerance for JANTX1N4125D-1?
JANTX1N4125D-1 has a nominal Zener voltage of 47 V with a guaranteed tolerance of ±1%, as indicated by the "D" suffix in its part number per Microsemi's nomenclature. This tolerance is verified under standard test conditions (25 °C, 250 mA Zener test current) and maintained across the full military temperature range per MIL-PRF-19500/435 screening.
Is JANTX1N4125D-1 RoHS compliant?
No, JANTX1N4125D-1 is not RoHS compliant. Per Microsemi documentation, RoHS-compliant versions (e.g., with "e3" suffix) are available only for commercial-grade variants-not for JAN, JANTX, JANTXV, or JANS levels. The JANTX1N4125D-1 uses traditional tin-lead plating per MIL-STD-750 method 2026.
What is the maximum Zener current IZM for JANTX1N4125D-1?
The maximum Zener current IZM for JANTX1N4125D-1 is 40 mA, derived from its 500 mW power rating and 47 V nominal Zener voltage (IZM = PM(AV)/VZ ≈ 500 mW / 47 V). This value is confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1.
Does JANTX1N4125D-1 require heatsinking in normal operation?
JANTX1N4125D-1 does not require external heatsinking at ambient temperatures ≤50 °C and power dissipation ≤500 mW. Its thermal resistance junction-to-ambient is 300 °C/W on a standard FR4 board; however, linear derating begins at 50 °C lead temperature, reaching zero dissipation at 175 °C-so board layout and copper area should be evaluated per Figure 2 in the datasheet.
How is polarity marked on JANTX1N4125D-1?
JANTX1N4125D-1 uses a single black band to indicate the cathode terminal. When used as a Zener regulator, the cathode (non-banded end) must be connected to the higher-potential supply rail, and the anode (banded end) to the reference or ground node-this is explicitly stated in the Mechanical and Packaging section of T4-LDS-0245-2.
JANTX1N4125D-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:
- ±1%
- 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)
JANTX1N4125D-1 FAQ
1.How can I place an order for JANTX1N4125D-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4125D-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 JANTX1N4125D-1 reliable?
The price and inventory of JANTX1N4125D-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4125D-1 is usually 5 days.
3.What payment methods are accepted for JANTX1N4125D-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4125D-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4125D-1?
JANTX1N4125D-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4125D-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 JANTX1N4125D-1?
For technical support, including JANTX1N4125D-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4125D-1 requirements.
6.How does Aetrix verify that JANTX1N4125D-1 is sourced from the original manufacturer or authorized distributors?
All JANTX1N4125D-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 JANTX1N4125D-1 meets industry standards.
7.What is the process for return or replacement of JANTX1N4125D-1?
All JANTX1N4125D-1 units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4125D-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 JANTX1N4125D-1 part is unused and in its original packaging.
Return procedure for JANTX1N4125D-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTX1N4125D-1 Tags
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