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Microchip Technology 1N4625UR-1/TR
- Part No.:
- 1N4625UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4625UR-1/TR.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,312
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Product details
Overview
1N4625UR-1/TR from Microsemi is a 500 mW, 5.1 V ±5% surface-mount Zener diode in DO-213AA (SOD-80) glass MELF package, qualified to MIL-PRF-19500/435 JANTXV level, with 1500 Ω dynamic impedance at 250 mA test current and 3.0 µA max reverse leakage at 3.0 V. It delivers stable voltage regulation in precision reference and power supply feedback paths for aerospace and industrial control systems.
For engineers reviewing the 1N4625UR-1/TR datasheet, 1N4625UR-1/TR pinout, 1N4625UR-1/TR application, or 1N4625UR-1/TR equivalent, key selection criteria include Zener voltage tolerance, noise density (2 µV/√Hz), thermal resistance (100 °C/W junction-to-end-cap), and hermetic glass packaging for high-reliability environments.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased breakdown mode, with Zener voltage specified at 250 mA test current (IZT) and characterized over -65 °C to +175 °C junction temperature range. Its metallurgically bonded construction ensures mechanical robustness and low parameter drift under thermal cycling.
The 1N4625UR-1/TR exhibits a temperature coefficient of -0.045 %/°C to +0.030 %/°C, enabling predictable regulation across wide ambient ranges, and features minimal capacitance (typical <2 pF at 0 V) per Figure 3 - critical for high-frequency stability in analog sensing and oscillator bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V ±5% at 250 mA - defines nominal regulation point with tight tolerance for reference accuracy |
| Power Dissipation | 500 mW at 25 °C, derating linearly to zero at 175 °C - supports sustained operation in compact, uncooled layouts |
| Dynamic Impedance (ZZT) | 1500 Ω at 250 mA - indicates moderate AC impedance affecting regulation ripple rejection |
| Reverse Leakage (IR) | 5.0 µA max at 3.0 V - ensures low quiescent current in standby or low-power bias circuits |
| Noise Density (ND) | 2 µV/√Hz at 250 mA - enables use in low-noise analog references where broadband voltage stability is critical |
| 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 - supports deployment in extended-environment avionics, downhole, and military electronics |
Pinout & Package
DO-213AA (SOD-80) glass MELF package: hermetically sealed, cylindrical, axial-symmetric body with tin-lead or RoHS-compliant matte-tin plating; cathode indicated by single dark band; polarity requires banded end to be positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to circuit ground or lower-potential rail; forms reference return path in shunt regulator topology |
| Cathode | Zener regulation terminal / voltage reference output | Connected to regulated node; supplies stable 5.1 V reference when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Enables operation in high-humidity, corrosive, or radiation-prone environments without parameter shift or seal failure |
| MIL-PRF-19500/435 JANTXV qualification | Guarantees screening for burn-in, temperature cycling, and life testing - required for flight-critical subsystems |
| Metallurgical bond interface | Eliminates wirebond fatigue and interfacial delamination under shock/vibration - essential for launch and airborne platforms |
| Low noise density (2 µV/√Hz) | Supports precision analog front-ends in data acquisition and sensor signal conditioning without added filtering |
| Non-ESD-sensitive design | Withstands >4 kV HBM per MIL-STD-750 Method 1020 - simplifies handling and eliminates ESD protection overhead |
Applications
| Aerospace Power Monitoring | Industrial Sensor Reference |
|---|---|
Use Scenario: Monitoring bus voltage in satellite power distribution units using discrete shunt regulators. IC Role / Device Role / Timing Role: Zener diode provides primary 5.1 V reference for ADC input scaling and comparator thresholds. Use Value: Hermetic DO-213AA package ensures long-term stability in vacuum and radiation environments without parameter drift. | Use Scenario: Biasing bridge sensors in high-temperature process control transmitters (e.g., pressure, flow). IC Role / Device Role / Timing Role: Serves as temperature-stable excitation reference for Wheatstone bridge arms. Use Value: -65 °C to +175 °C operating range and low αVZ allow accurate calibration across industrial thermal cycles. |
| Military Radio RF Bias | Medical Imaging Power Supply |
Use Scenario: Providing stable gate bias for GaAs FET amplifiers in tactical HF/VHF radios. IC Role / Device Role / Timing Role: Shunt Zener regulates bias rail to maintain amplifier linearity and gain flatness. Use Value: Low capacitance (<2 pF) prevents RF coupling into bias network, preserving amplifier stability and noise figure. | Use Scenario: Generating isolated 5.1 V reference for photodiode preamp stages in CT/X-ray detector modules. IC Role / Device Role / Timing Role: Precision voltage reference for analog signal chain offset correction and gain calibration. Use Value: 2 µV/√Hz noise density minimizes baseline fluctuation in low-current photodiode readout paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDLL4625-1 | Commercial-grade version; same 5.1 V, 500 mW, DO-213AA package but not MIL-qualified | Lacks JANTXV screening; suitable for non-mission-critical industrial or telecom equipment | Select when full MIL-PRF-19500 compliance is unnecessary and cost sensitivity is higher |
| 1N4625UR-1 | Same electrical specs and package, but supplied in bulk (not tape-and-reel); no "TR" suffix | Requires manual placement or different feeder setup; unsuitable for high-speed SMT lines requiring reel-fed feeders | Choose only for prototyping, low-volume assembly, or legacy production lines without tape-and-reel capability |
Compared with CDLL4625-1 and 1N4625UR-1, the 1N4625UR-1/TR offers guaranteed JANTXV reliability screening and automated SMT compatibility via EIA-481-1-A tape-and-reel packaging - making it the sole option for volume production of certified aerospace hardware.
Availability
1N4625UR-1/TR is available at Aetrix Electronics and suitable for aerospace power monitoring, industrial sensor reference, military radio RF bias, and medical imaging power supply applications requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4625UR-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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets, with emphasis on radiation-hardened, high-temperature, and mil-spec components.
The 1N4625UR-1/TR belongs to Microsemi's legacy 1N46xxUR-1 series of metallurgically bonded glass Zeners - engineered specifically for mission-critical voltage reference and regulation in extreme-environment electronics.
FAQ
What is the Zener voltage tolerance for 1N4625UR-1/TR?
The 1N4625UR-1/TR has a nominal Zener voltage of 5.1 V with a standard tolerance of ±5%, measured at 250 mA test current and 25 °C. This tolerance is defined per JEDEC specification and applies to all devices in the 1N4614UR-1 through 1N4627UR-1 series unless otherwise screened.
Is 1N4625UR-1/TR RoHS compliant?
The 1N4625UR-1/TR is not RoHS compliant by default; RoHS versions carry the "e3" suffix (e.g., 1N4625UR-1e3/TR) and are available only in commercial-grade variants. The base 1N4625UR-1/TR uses tin-lead plating and meets MIL-PRF-19500 requirements, not EU RoHS Directive 2011/65/EU.
What does the "TR" suffix mean in 1N4625UR-1/TR?
The "TR" suffix in 1N4625UR-1/TR indicates tape-and-reel packaging per EIA-481-1-A standard using 12 mm carrier tape - optimized for automated SMT placement. This differs from the bulk-packaged 1N4625UR-1, which lacks the TR designation and requires manual or vibratory bowl feeding.
What is the maximum reverse leakage current for 1N4625UR-1/TR?
The 1N4625UR-1/TR has a maximum reverse leakage current (IR) of 5.0 µA at 3.0 V reverse voltage and 25 °C, as specified in the Electrical Characteristics table on page 4 of T4-LDS-0245 Rev. 2. This value ensures minimal loading in high-impedance reference nodes.
Can 1N4625UR-1/TR be used in place of 1N4625UR-1?
Yes - the 1N4625UR-1/TR shares identical electrical, thermal, and mechanical specifications with 1N4625UR-1; the only difference is packaging format. Both use DO-213AA package, same metallurgical bond, and JANTXV qualification. The TR variant simply adds EIA-481-1-A tape-and-reel for SMT automation.
1N4625UR-1/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 (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N4625UR-1/TR FAQ
1.How can I place an order for 1N4625UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4625UR-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 1N4625UR-1/TR reliable?
The price and inventory of 1N4625UR-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 1N4625UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4625UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4625UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4625UR-1/TR?
1N4625UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4625UR-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 1N4625UR-1/TR?
For technical support, including 1N4625UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4625UR-1/TR requirements.
6.How does Aetrix verify that 1N4625UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4625UR-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 1N4625UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4625UR-1/TR?
All 1N4625UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4625UR-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 1N4625UR-1/TR part is unused and in its original packaging.
Return procedure for 1N4625UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4625UR-1/TR Tags
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