My Inquiry
My Account
Microchip Technology 1N4625-1
- Part No.:
- 1N4625-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4625-1.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:84
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4625-1 from Microsemi is a 500 mW, 5.1 V metallurgically bonded glass Zener diode in DO-35 package, qualified to JANS 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 delivers stable voltage regulation in high-reliability power supply reference circuits.
For engineers reviewing the 1N4625-1 datasheet, 1N4625-1 pinout, 1N4625-1 application, or 1N4625-1 equivalent, this page provides verified electrical parameters, military-grade qualification status, thermal derating behavior, noise density (2 µV/√Hz), and direct alternatives for aerospace, defense, and industrial analog designs.
Technical Context
The 1N4625-1 operates as a precision shunt voltage regulator with a nominal Zener voltage of 5.1 V at 250 mA test current (IZT), exhibiting a temperature coefficient of –0.045 %/°C to +0.030 %/°C. Its metallurgical bond construction ensures low long-term drift and radiation hardness per Microsemi MicroNote 050.
It maintains regulation across wide current ranges (IZK to IZM = 70 mA) and temperature extremes (–65 °C to +175 °C), with thermal resistance junction-to-lead of 250 °C/W at 10 mm lead length. Noise density is specified at 2 µV/√Hz - significantly lower than higher-voltage variants in the same family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V at 250 mA - sets precise reference point for feedback loops in regulated DC supplies. |
| Power Dissipation | 500 mW at 25 °C - supports continuous operation in compact axial-leaded layouts with linear derating to zero at 175 °C. |
| Dynamic Impedance (ZZT) | 1500 Ω at 250 mA - determines regulation stiffness; lower values improve load transient response. |
| Reverse Leakage (IR) | 3.0 µA max at 3.8 V - ensures minimal quiescent current draw in low-power bias networks. |
| Noise Density (ND) | 2 µV/√Hz - enables use in low-noise analog references where voltage stability dominates over raw accuracy. |
| Temp Coefficient (αVZ) | –0.045 to +0.030 %/°C - allows predictable drift compensation in temperature-critical instrumentation. |
| Junction Temp Range | –65 °C to +175 °C - validated for extended-range operation in avionics and downhole electronics. |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package; cathode indicated by band; banded end is positive during Zener operation. Weight ≈ 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or common return; defines 0 V reference for regulation. |
| Cathode | Zener output terminal | Provides regulated 5.1 V output when reverse-biased; must be held at higher potential than anode. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 qualification | Validated reliability up to JANS level for mission-critical systems with zero burn-in waivers required. |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal cycling and mechanical shock. |
| Low noise density | 2 µV/√Hz enables use in precision analog front-ends without external filtering. |
| Hermetic glass sealing | Prevents moisture ingress and parameter shift in humid or corrosive environments. |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per Microsemi MicroNote 050 - suitable for space-qualified designs. |
Applications
| Avionics Power Reference | Defense System Bias Network |
|---|---|
Use Scenario: Providing stable 5.1 V reference for ADCs and op-amp comparators in flight control computers. IC Role / Device Role / Timing Role: Shunt voltage reference regulating feedback node of isolated DC-DC converters. Use Value: Maintains <±10 mV output deviation over –55 °C to +125 °C ambient, meeting DO-160E environmental compliance. | Use Scenario: Setting threshold voltages in missile guidance sensor signal conditioning modules. IC Role / Device Role / Timing Role: Precision bias source for photodiode transimpedance amplifiers and comparator hysteresis networks. Use Value: Delivers sub-µA leakage and <1500 Ω dynamic impedance to preserve signal integrity in low-current analog paths. |
| Industrial PLC Analog Input | Satellite Onboard Computer |
Use Scenario: Calibrating 4–20 mA loop-powered sensor interfaces in factory automation controllers. IC Role / Device Role / Timing Role: Primary voltage reference for DAC-based calibration circuitry and multiplexer channel selection logic. Use Value: Enables traceable NIST-calibrated offsets via stable 5.1 V node with <0.05 %/°C drift compensation. | Use Scenario: Supplying reference voltage for radiation-hardened FPGA configuration monitors and telemetry ADCs. IC Role / Device Role / Timing Role: Radiation-tolerant shunt regulator in redundant power management subsystems. Use Value: Sustains regulation after 100 krad(Si) TID exposure with no parametric shift beyond spec limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4625UR-1 | Same electrical specs; surface-mount DO-213AA package instead of axial DO-35. | Required for automated SMT assembly; eliminates hand-soldering and lead trimming steps. | Select when board space is constrained and reflow compatibility is mandatory. |
| 1N5231B | 5.1 V, ±5%, 500 mW, but commercial-grade only; no MIL-PRF-19500 qualification or radiation hardness. | Acceptable for non-mission-critical industrial controls where cost and availability dominate. | Choose only if JANS-level reliability, hermeticity, and TID tolerance are not required. |
Compared with 1N4625UR-1, the 1N4625-1 offers proven axial-leaded robustness for manual repair and high-vibration environments; versus 1N5231B, it delivers guaranteed military-grade performance, including full JANS screening and radiation survivability - critical for flight hardware and nuclear instrumentation.
Availability
1N4625-1 is available at Aetrix Electronics and suitable for avionics power reference, defense system bias network, and industrial PLC analog input applications requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4625-1 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 1N4625-1 belongs to Microsemi's legacy MIL-qualified Zener diode product line, engineered specifically for voltage reference stability, radiation tolerance, and long-term parametric consistency in safety-critical systems.
FAQ
What is the Zener voltage tolerance of the 1N4625-1?
The 1N4625-1 has a nominal Zener voltage of 5.1 V with a standard tolerance of ±5%, as defined by JEDEC registration and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2. This tolerance applies under standard test conditions at 25 °C with 250 mA Zener test current (IZT).
Is the 1N4625-1 suitable for space applications?
Yes - the 1N4625-1 is inherently radiation hard per Microsemi MicroNote 050 and qualified to JANS level per MIL-PRF-19500/435, making it suitable for low-earth orbit and deep-space missions where total ionizing dose (TID) resilience and parametric stability are mandatory. The 1N4625-1 has been used in satellite onboard computer reference circuits.
What is the maximum Zener current (IZM) for the 1N4625-1?
The maximum Zener current (IZM) for the 1N4625-1 is 70.0 mA, as specified in the Electrical Characteristics table on page 3 of T4-LDS-0245-2. This value corresponds to the current at which the device dissipates its rated 500 mW at 25 °C ambient, before thermal derating begins.
Does the 1N4625-1 have RoHS-compliant versions?
Yes - RoHS-compliant versions of the 1N4625-1 are available with the "e3" suffix (e.g., 1N4625-1e3), but only in commercial-grade configurations. MIL-qualified versions (JAN/JANTX/JANTXV/JANS) retain traditional tin-lead plating per MIL-STD-750.
How does the noise performance of the 1N4625-1 compare to higher-voltage Zeners in the same series?
The 1N4625-1 exhibits 2 µV/√Hz noise density at 250 mA, consistent with the trend that lower-voltage Zeners in the 1N46xx-1 series deliver reduced noise - e.g., 1N4627-1 (6.2 V) is rated at 5 µV/√Hz, while 1N4624-1 (4.7 V) is 3 µV/√Hz. This makes the 1N4625-1 especially valuable in low-noise analog references.
1N4625-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Bulk
- 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 FAQ
1.How can I place an order for 1N4625-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4625-1 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 1N4625-1 reliable?
The price and inventory of 1N4625-1 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 is usually 5 days.
3.What payment methods are accepted for 1N4625-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4625-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4625-1?
1N4625-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4625-1 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 1N4625-1?
For technical support, including 1N4625-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4625-1 requirements.
6.How does Aetrix verify that 1N4625-1 is sourced from the original manufacturer or authorized distributors?
All 1N4625-1 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 1N4625-1 meets industry standards.
7.What is the process for return or replacement of 1N4625-1?
All 1N4625-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4625-1, 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 1N4625-1 part is unused and in its original packaging.
Return procedure for 1N4625-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4625-1 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
