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Microchip Technology JANS1N4625D-1/TR
- Part No.:
- JANS1N4625D-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4625D-1/TR.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,962
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Product details
Overview
JANS1N4625D-1/TR from Microsemi is a 5.1 V, 1% tolerance, 500 mW 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 1500 Ω dynamic impedance, 3.0 µA max reverse leakage at 3.8 V, and ±0.045%/°C to +0.030%/°C temperature coefficient.
For engineers reviewing the JANS1N4625D-1/TR datasheet, JANS1N4625D-1/TR pinout, JANS1N4625D-1/TR application, or JANS1N4625D-1/TR equivalent, key selection criteria include its JANS-level radiation hardness, 1% Zener voltage tolerance, low noise density (≤2 µV/√Hz), hermetic DO-35 packaging, and operation across –65°C to +175°C junction temperature range.
Technical Context
This device operates as a precision shunt voltage regulator in reverse-biased breakdown mode, with cathode band marking polarity. Its metallurgical bond construction ensures mechanical robustness and long-term stability under thermal cycling and radiation exposure.
It exhibits a non-linear Zener knee region near 5.1 V, requiring minimum 250 mA test current (IZT) for specified VZ and ZZT. Dynamic impedance (ZZT = 1500 Ω) and temperature coefficient (αVZ = –0.045/+0.030 %/°C) are measured at IZT under thermal equilibrium at 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 5.1 V at 250 mA - defines nominal regulation point with ±1% tolerance (D suffix), enabling precise reference generation in analog power supplies. |
| Power Dissipation PM(AV) | 0.5 W at 25 °C - supports continuous regulation in compact axial-leaded layouts; derates linearly to zero at 175 °C junction temperature. |
| Dynamic Impedance ZZT | 1500 Ω at 250 mA - indicates moderate AC impedance in breakdown, suitable for low-frequency stabilization but not ultra-low-noise references. |
| Reverse Leakage IR | 3.0 µA max at 3.8 V - ensures minimal quiescent current draw below breakdown, critical for battery-backed or low-power bias networks. |
| Temperature Coefficient αVZ | –0.045 to +0.030 %/°C - enables predictable drift compensation in wide-temperature military systems without external trimming. |
| Noise Density ND | ≤2 µV/√Hz at 250 mA - confirms suitability for medium-precision analog references where broadband noise must be constrained. |
| Junction Temperature Range | –65 °C to +175 °C - validated for operation in extreme environments including space-grade avionics and downhole instrumentation. |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package: hermetically sealed, tin-lead or RoHS-compliant matte-tin plated leads, cathode indicated by single black band. Total weight ≈ 0.2 g; body diameter 1.42–2.29 mm, length 3.56–5.08 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to system ground or common return; establishes reference potential for regulated output at cathode. |
| Cathode (banded end) | Zener regulation output | Provides stabilized 5.1 V output when reverse-biased; must be connected through current-limiting resistor to higher-voltage rail. |
Key Features
| Feature | Design Value |
|---|---|
| JANS qualification per MIL-PRF-19500/435 | Validated for Class S (space) and Class H (high reliability) applications with full lot traceability and screening. |
| Metallurgical bond construction | Eliminates wire-bond fatigue and interfacial delamination, ensuring >10⁶ thermal cycles reliability in mission-critical systems. |
| 1% Zener voltage tolerance (D suffix) | Reduces need for post-assembly calibration in precision voltage references and analog sensor excitation circuits. |
| Radiation hardness per MicroNote 050 | Withstands total ionizing dose (TID) ≥ 100 krad(Si) without parametric shift beyond spec limits. |
| Low capacitance (typ. <2 pF) | Minimizes high-frequency coupling in RF bias networks and fast-switching power supply feedback paths. |
Applications
| Aerospace Power Conditioning | Defense System Reference Supplies |
|---|---|
Use Scenario: Regulating auxiliary 5 V rails in satellite power distribution units exposed to thermal vacuum and radiation. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable bias for ADCs, op-amps, and isolated DC-DC controller feedback networks. Use Value: JANS qualification and –65°C to +175°C operation ensure uninterrupted regulation during orbital thermal cycling and radiation events. |
Use Scenario: Generating precision 5.1 V reference in radar receiver front-end bias chains operating in airborne electronic warfare platforms. IC Role / Device Role / Timing Role: Low-noise Zener source for RF amplifier biasing and analog-to-digital conversion reference voltage. Use Value: ≤2 µV/√Hz noise density and 1% tolerance maintain signal integrity in high-dynamic-range receivers. |
| Downhole Instrumentation Sensors | Nuclear Facility Monitoring Circuits |
Use Scenario: Stabilizing excitation voltage for piezoresistive pressure transducers in oil/gas well logging tools at 175 °C ambient. IC Role / Device Role / Timing Role: High-temperature Zener regulator maintaining sensor bridge bias accuracy over extended dwell times. Use Value: Full-spec operation up to +175 °C junction temperature eliminates derating penalties and extends tool operational depth. |
Use Scenario: Providing fail-safe reference voltage in radiation-hardened monitoring systems for reactor control rod position sensors. IC Role / Device Role / Timing Role: Radiation-tolerant shunt regulator ensuring reference stability during neutron/gamma exposure. Use Value: Inherent radiation hardness (≥100 krad TID) prevents parametric drift that could trigger false trip signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4625US-1/TR | Same 5.1 V, 1% Zener voltage and JANS qualification, but in surface-mount DO-213AA package. | Requires PCB re-layout for SMT assembly; lacks axial-lead mechanical strain relief in high-vibration environments. | Select when board space is constrained and automated placement is required; verify thermal pad design for 0.5 W dissipation. |
| JANTXV1N4625D-1/TR | Identical electrical specs and DO-35 package, but qualified only to JANTXV level (not JANS); lower screening rigor and no radiation testing. | Suitable for high-reliability ground-based systems but excluded from spaceflight or nuclear-qualified designs. | Select for cost-sensitive defense programs where full JANS screening is not mandated by program requirements. |
Compared with JANS1N4625D-1/TR, the 1N4625US-1/TR offers identical regulation performance in a smaller footprint but sacrifices mechanical ruggedness, while the JANTXV1N4625D-1/TR reduces procurement cost and lead time at the expense of radiation hardness and extended environmental validation.
Availability
JANS1N4625D-1/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, defense system reference supplies, and downhole instrumentation sensors requiring stable component supply across extended temperature ranges and radiation environments.
Supply support for JANS1N4625D-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 aerospace-grade components.
The JANS1N4625D-1/TR belongs to Microsemi's legacy 1N46xx series of mil-qualified Zener diodes, designed specifically for precision voltage regulation in mission-critical analog subsystems where long-term stability and environmental survivability are mandatory.
FAQ
What is the Zener voltage tolerance of JANS1N4625D-1/TR?
The "D" suffix in JANS1N4625D-1/TR denotes a ±1% Zener voltage tolerance at 250 mA test current, meaning the actual VZ falls within 5.049 V to 5.151 V under specified conditions. This tighter tolerance eliminates post-production trimming in precision analog circuits and improves yield in high-volume military assemblies.
Is JANS1N4625D-1/TR radiation hardened?
Yes, JANS1N4625D-1/TR is inherently radiation hard per Microsemi MicroNote 050, with documented survivability to ≥100 krad(Si) total ionizing dose. Its metallurgically bonded structure and hermetic DO-35 package contribute to this hardness, making it suitable for satellite and nuclear facility applications without additional shielding.
What is the maximum operating temperature for JANS1N4625D-1/TR?
JANS1N4625D-1/TR has a specified junction and storage temperature range of –65 °C to +175 °C. At +175 °C, rated power dissipation drops to zero; full 0.5 W operation is guaranteed only up to +50 °C lead temperature, with linear derating applied between +50 °C and +175 °C.
Does JANS1N4625D-1/TR require a heatsink?
No heatsink is required for JANS1N4625D-1/TR under typical conditions. Its thermal resistance junction-to-lead is 250 °C/W with 10 mm lead length, so at 0.5 W dissipation and 25 °C ambient, junction temperature rises only ~125 °C above ambient - remaining within the +175 °C limit. PCB copper area provides sufficient conduction.
How is polarity marked on JANS1N4625D-1/TR?
JANS1N4625D-1/TR uses a single black cathode band on the glass body to indicate the cathode terminal. The banded end must be connected to the higher-potential side of the circuit for proper Zener regulation; the unbanded (anode) end connects to ground or common reference. This marking complies with JEDEC DO-35 standards.
JANS1N4625D-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):
- 5.1 V
- Tolerance:
- ±1%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1.5 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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)
JANS1N4625D-1/TR FAQ
1.How can I place an order for JANS1N4625D-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4625D-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 JANS1N4625D-1/TR reliable?
The price and inventory of JANS1N4625D-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 JANS1N4625D-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4625D-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4625D-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4625D-1/TR?
JANS1N4625D-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4625D-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 JANS1N4625D-1/TR?
For technical support, including JANS1N4625D-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4625D-1/TR requirements.
6.How does Aetrix verify that JANS1N4625D-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4625D-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 JANS1N4625D-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4625D-1/TR?
All JANS1N4625D-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4625D-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 JANS1N4625D-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4625D-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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