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Microchip Technology 1N4625-1/TR
- Part No.:
- 1N4625-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4625-1/TR.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:3,585
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Product details
Overview
1N4625-1/TR from Microsemi is a 500 mW, 5.1 V Zener diode in DO-35 glass package, qualified to JANTXV level per MIL-PRF-19500/435, with 5% voltage tolerance, 1500 Ω dynamic impedance at 250 mA test current, and 3.0 µA max reverse leakage at 3.8 V. It serves as a precision voltage reference in military-grade power regulation circuits.
For engineers reviewing the 1N4625-1/TR datasheet, 1N4625-1/TR pinout, 1N4625-1/TR application, or 1N4625-1/TR equivalent, key selection criteria include its hermetically sealed axial-leaded construction, metallurgical bond reliability, low noise density (2 µV/√Hz), and linear derating from 500 mW at 25 °C to zero at 175 °C.
Technical Context
This device operates in reverse breakdown to maintain stable 5.1 V regulation across wide current (250 mA IZT) and temperature (-65 to +175 °C) ranges. Its internal metallurgical bond ensures mechanical robustness and long-term stability under thermal cycling and radiation exposure.
The 1N4625-1/TR exhibits a bipolar temperature coefficient of -0.045/+0.030 %/°C, enabling predictable drift compensation in analog references. Its 1500 Ω dynamic impedance at IZT and 3.0 µA IR @ VR = 3.8 V define regulation accuracy and leakage-limited low-power operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 5.1 V ±5% at 250 mA - defines nominal regulation point for stable reference generation |
| Power Dissipation | 500 mW at 25 °C, linearly derated to zero at 175 °C - sets maximum thermal load on PCB layout |
| Dynamic Impedance ZZT | 1500 Ω at 250 mA - determines output voltage variation under load current changes |
| Reverse Leakage IR | 3.0 µA max at 3.8 V - limits error in high-impedance bias networks |
| Noise Density | 2 µV/√Hz at 250 mA - critical for low-noise analog references and sensor excitation |
| Temp Coefficient αVZ | -0.045/+0.030 %/°C - enables predictable drift modeling in temperature-critical designs |
| Junction Temp Range | -65 to +175 °C - supports operation in extended industrial and aerospace environments |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package with cathode indicated by band; banded end is positive during Zener regulation. Weight ≈ 0.2 g. RoHS-compliant matte-tin plating on commercial grade.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to circuit ground or lower potential; establishes reference polarity |
| Cathode (banded end) | Zener regulation terminal / reverse-bias anode | Connected to regulated voltage rail; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass DO-35 seal | Prevents moisture ingress and parameter drift over decades in harsh environments |
| Metallurgical bond construction | Eliminates interfacial delamination under thermal shock and vibration stress |
| MIL-PRF-19500/435 JANTXV qualification | Validated reliability for mission-critical avionics and defense electronics |
| Low noise density (2 µV/√Hz) | Enables use in precision analog front-ends without added filtering |
| Non-ESD-sensitive per MIL-STD-750 Method 1020 | Allows handling without special ESD controls during assembly and test |
Applications
| Aerospace Power Reference | Defense System Bias Network |
|---|---|
Use Scenario: Providing stable 5.1 V reference for ADCs and DACs in satellite telemetry modules operating across -55 to +125 °C. IC Role / Device Role / Timing Role: Zener voltage reference source for analog signal conditioning circuitry. Use Value: JANTXV qualification and -65 to +175 °C junction range ensure parametric stability over orbital thermal cycles. | Use Scenario: Generating precision bias voltages for RF amplifier stages in radar transceivers exposed to shock and radiation. IC Role / Device Role / Timing Role: Low-noise, radiation-hardened voltage reference for gain control and LO injection circuits. Use Value: 2 µV/√Hz noise density and inherent radiation hardness per MicroNote 050 minimize signal distortion in high-frequency paths. |
| Industrial Sensor Excitation | Medical Instrument Calibration |
Use Scenario: Supplying excitation voltage to strain gauge bridges in oilfield downhole pressure sensors operating at 150 °C ambient. IC Role / Device Role / Timing Role: Temperature-stable Zener regulator for bridge excitation in high-temperature analog front-ends. Use Value: Linear derating to zero at 175 °C and metallurgical bond integrity prevent thermal runaway or parameter shift at elevated temperatures. | Use Scenario: Serving as primary voltage standard in portable ECG analyzer calibration subsystems requiring traceable 5.1 V reference. IC Role / Device Role / Timing Role: Primary Zener reference in metrology-grade calibration chain with <5% tolerance and low long-term drift. Use Value: Hermetic glass package and MIL-qualified process ensure calibration stability over 10+ year service life without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4625US-1 | Same electrical specs, but in surface-mount DO-213AA package instead of axial DO-35 | Requires SMT reflow process; unsuitable for through-hole prototyping or high-vibration mechanical mounting | Select when board space is constrained and automated assembly is used |
| 1N4733A | 5.1 V, 1 W rating, 10% tolerance, TO-92 plastic package, no military qualification | Lacks MIL-PRF-19500/435 qualification and hermetic seal; higher noise (10 µV/√Hz) and wider tolerance reduce precision | Select only for cost-sensitive commercial applications where reliability and noise are secondary |
Compared with 1N4625US-1 and 1N4733A, the 1N4625-1/TR uniquely combines JANTXV reliability, hermetic glass packaging, and 2 µV/√Hz noise-making it irreplaceable in aerospace reference chains where parameter stability under thermal/radiation stress is non-negotiable.
Availability
1N4625-1/TR is available at Aetrix Electronics and suitable for aerospace power reference, defense system bias network, and industrial sensor excitation requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4625-1/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 military-qualified components.
The 1N4625-1/TR belongs to Microsemi's legacy 500 mW Zener diode family designed specifically for precision voltage regulation in mission-critical defense, aerospace, and industrial systems demanding MIL-PRF-19500/435 compliance.
FAQ
What is the Zener voltage tolerance of the 1N4625-1/TR?
The 1N4625-1/TR has a nominal Zener voltage of 5.1 V with a standard tolerance of ±5%, as defined in the JEDEC-registered specification and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2. This tolerance applies at 25 °C with the device in thermal equilibrium and tested at IZT = 250 mA.
Is the 1N4625-1/TR RoHS compliant?
Yes, the 1N4625-1/TR is RoHS compliant, indicated by the "e3" suffix in its full part number variant (e.g., 1N4625-1e3/TR). Per the datasheet, RoHS-compliant versions use annealed matte-tin plating and are available for commercial-grade units only-not for JAN/JANTX/JANTXV/JANS reliability levels.
What is the maximum reverse leakage current for the 1N4625-1/TR?
The maximum reverse leakage current (IR) for the 1N4625-1/TR is 3.0 µA at VR = 3.8 V, as specified in the Electrical Characteristics table on page 3 of T4-LDS-0245-2. This value is measured at 25 °C and defines the upper bound of parasitic current in high-impedance reference networks.
Does the 1N4625-1/TR require special ESD handling?
No, the 1N4625-1/TR is non-sensitive to ESD per MIL-STD-750 Method 1020, as stated in the Applications/Benefits section. Its metallurgically bonded structure and hermetic glass package eliminate the need for ESD-safe workstations or wrist straps during standard handling and soldering.
What is the thermal resistance junction-to-lead for the 1N4625-1/TR?
The thermal resistance junction-to-lead (RθJL) for the 1N4625-1/TR is 250 °C/W, measured with 3/8 inch (10 mm) lead length from the body, as listed in the Maximum Ratings table on page 1 of T4-LDS-0245-2. This value guides heatsinking design when operating near maximum power dissipation.
1N4625-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1500 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-7
1N4625-1/TR FAQ
1.How can I place an order for 1N4625-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4625-1/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 1N4625-1/TR reliable?
The price and inventory of 1N4625-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4625-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4625-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4625-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4625-1/TR?
1N4625-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4625-1/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 1N4625-1/TR?
For technical support, including 1N4625-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4625-1/TR requirements.
6.How does Aetrix verify that 1N4625-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4625-1/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 1N4625-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4625-1/TR?
All 1N4625-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4625-1/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 1N4625-1/TR part is unused and in its original packaging.
Return procedure for 1N4625-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4625-1/TR Tags
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