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Microchip Technology 1N4625UR/TR
- Part No.:
- 1N4625UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4625UR/TR.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,657
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Product details
Overview
1N4625UR/TR from Microsemi is a glass-encapsulated, surface-mount Zener diode in DO-213AA (SOD-80/MELF) package, rated for 0.5 W steady-state power dissipation, with nominal Zener voltage of 5.1 V ±5%, 250 mA test current, 1500 Ω dynamic impedance, and 5.0 μA maximum reverse leakage at 3.0 V. It regulates voltage in precision reference and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N4625UR/TR datasheet, 1N4625UR/TR pinout, 1N4625UR/TR application, or 1N4625UR/TR equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (150°C/W junction-to-end-cap), low noise density (1 μV/√Hz), hermetic glass sealing, and RoHS-compliant e3 marking with TR tape-and-reel packaging.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable output voltage under varying load and temperature conditions. Its DO-213AA glass MELF package provides hermetic sealing, ESD immunity per MIL-STD-750 Method 1020, and radiation hardness per MicroNote 050.
Electrical behavior is defined at 25°C with 250 mA Zener test current (IZT); dynamic impedance (ZZT) is measured using 25 μA AC superimposed on IZT. Temperature coefficient is bipolar (–0.045/+0.030 %/°C), indicating voltage stability near the 5.1 V knee region across –65°C to +175°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V ±5% at 250 mA - defines precise regulation point for low-voltage reference designs |
| Power Dissipation | 0.5 W at TEC < 100°C - limits continuous thermal load on end-cap termination |
| Zener Impedance (ZZT) | 1500 Ω max at 250 mA - determines output voltage variation under dynamic current changes |
| Reverse Leakage (IR) | 5.0 μA max at 3.0 V - ensures minimal quiescent current in standby or sensing circuits |
| Noise Density | 1 μV/√Hz typical at 25°C - supports low-noise analog references in instrumentation |
| Temp Coefficient (αVZ) | –0.045/+0.030 %/°C - enables predictable drift compensation in wide-temperature applications |
| Thermal Resistance | 150°C/W junction-to-end-cap - informs heatsinking requirements when mounted on FR4 with 1 oz Cu |
Pinout & Package
DO-213AA (SOD-80 / MELF) glass surface-mount package: hermetically sealed cylindrical body with tin-lead or matte-tin end caps; cathode indicated by single band; polarity requires banded end to be positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to supply rail or voltage node requiring stabilization at 5.1 V |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Enables operation from –65°C to +175°C without moisture ingress or parameter shift |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling |
| Low capacitance | Typical <1.5 pF (per Figure 3) - preserves high-frequency signal integrity in RF bias networks |
| Radiation-hardened design | Documented per Microsemi MicroNote 050 - suitable for aerospace and defense systems |
| Tape-and-reel packaging | TR suffix denotes EIA-481-1-A compliant 12 mm tape, 2000 units per 7-inch reel - supports automated SMT assembly |
Applications
| Industrial Power Monitoring | Medical Sensor Biasing |
|---|---|
Use Scenario: Real-time monitoring of 5 V DC rails in PLC I/O modules with ±1% accuracy requirement. IC Role / Device Role / Timing Role: Precision shunt reference providing stable 5.1 V reference for ADC input scaling and comparator thresholds. Use Value: Maintains regulation within ±5% over –40°C to +85°C ambient, enabling consistent measurement accuracy without calibration drift. |
Use Scenario: Biasing photodiode amplifiers in portable pulse oximeters where low-noise analog front-ends are critical. IC Role / Device Role / Timing Role: Low-noise Zener reference supplying clean 5.1 V to op-amp feedback networks and transimpedance stages. Use Value: 1 μV/√Hz noise density minimizes baseline fluctuation, improving SpO₂ calculation resolution at sub-1% saturation levels. |
| Aerospace Avionics Reference | Automotive ECUs |
Use Scenario: Voltage reference in radiation-tolerant flight control sensor interfaces operating in LEO environments. IC Role / Device Role / Timing Role: Radiation-hardened shunt regulator stabilizing 5.1 V for FPGA configuration memory and analog monitor ICs. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or derating, reducing SWaP-C. |
Use Scenario: Overvoltage clamp protecting CAN transceiver inputs against load-dump transients up to 40 V. IC Role / Device Role / Timing Role: Fast-response Zener clamping diode placed between VCC and ground to limit transient excursions. Use Value: 0.5 W rating and 1500 Ω ZZT enable controlled energy absorption without thermal runaway during ISO 7637-2 Pulse 5a events. |
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 | Includes internal metallurgical bond; higher reliability per MIL-PRF-19500/500 qualification | Required for JANTXV-level military/aerospace programs demanding extended life testing | Select 1N4625UR-1 only when JAN/JANTXV qualification and bond-wire integrity verification are mandated |
| BZX55C5V1 (ON Semiconductor) | Plastic DO-35 package; 500 mW rating; ±5% tolerance; 1700 Ω ZZT; no radiation hardening | Suitable for commercial-grade consumer electronics where cost and volume outweigh environmental robustness | Choose BZX55C5V1 for non-critical, cost-sensitive applications lacking extreme temp/radiation requirements |
Compared with 1N4625UR/TR, the 1N4625UR-1 variant adds military-grade bonding and qualification but requires separate procurement; BZX55C5V1 offers lower cost and wider distribution but lacks hermeticity, radiation hardness, and tight thermal resistance specs needed for harsh environments.
Availability
1N4625UR/TR is available at Aetrix Electronics and suitable for industrial power monitoring, medical sensor biasing, aerospace avionics reference, and automotive ECU protection requiring stable component supply across extended temperature and reliability profiles.
Supply support for 1N4625UR/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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and high-performance analog and mixed-signal components.
The 1N4625UR/TR belongs to Microsemi's legacy DO-213AA glass Zener family, engineered for mission-critical voltage regulation in aerospace, defense, and industrial systems where hermeticity, wide temperature operation, and ESD immunity are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4625UR/TR?
The 1N4625UR/TR has a nominal Zener voltage of 5.1 V with a standard tolerance of ±5%, as specified in the Microsemi datasheet. No suffix indicates this default tolerance; tighter tolerances (±2% or ±1%) require C or D suffixes respectively, which are not present in the 1N4625UR/TR part number.
Is 1N4625UR/TR RoHS compliant?
Yes, the "e3" suffix in 1N4625UR/TR confirms RoHS compliance per EU Directive 2011/65/EU, with annealed matte-tin plating on end caps meeting MIL-STD-750 Method 2026 solderability requirements.
What does the "TR" suffix mean in 1N4625UR/TR?
The "TR" suffix in 1N4625UR/TR indicates tape-and-reel packaging per EIA-481-1-A standard: 12 mm carrier tape, 2000 units per 7-inch reel, enabling compatibility with automated SMT placement equipment.
Can 1N4625UR/TR replace axial-leaded 1N4625 in existing designs?
No - 1N4625UR/TR uses a DO-213AA glass MELF surface-mount package, while the legacy 1N4625 is axial-leaded DO-35. Physical form factor, thermal path, and PCB footprint differ significantly; redesign is required for substitution.
What is the maximum reverse leakage current for 1N4625UR/TR at 3.0 V?
The maximum reverse leakage current for 1N4625UR/TR is 5.0 μA at 3.0 V, as specified in the Electrical Characteristics table on page 2 of the Microsemi datasheet. This value ensures minimal standby current in low-power monitoring circuits.
1N4625UR/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- 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:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N4625UR/TR FAQ
1.How can I place an order for 1N4625UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4625UR/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 1N4625UR/TR reliable?
The price and inventory of 1N4625UR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4625UR/TR is usually 5 days.
3.What payment methods are accepted for 1N4625UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4625UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4625UR/TR?
1N4625UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4625UR/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 1N4625UR/TR?
For technical support, including 1N4625UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4625UR/TR requirements.
6.How does Aetrix verify that 1N4625UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N4625UR/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 1N4625UR/TR meets industry standards.
7.What is the process for return or replacement of 1N4625UR/TR?
All 1N4625UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4625UR/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 1N4625UR/TR part is unused and in its original packaging.
Return procedure for 1N4625UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4625UR/TR Tags
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