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Microchip Technology 1N4620UR-1
- Part No.:
- 1N4620UR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4620UR-1.pdf
- Description:
- DIODE ZENER 3.3V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,208
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Product details
Overview
1N4620UR-1 from Microsemi is a 500 mW surface-mount Zener diode in DO-213AA (MELF) glass package, rated for 3.3 V nominal Zener voltage at 250 mA test current, with 1650 Ω dynamic impedance, 3.5 µA maximum reverse leakage at 1.5 V, and ±5% voltage tolerance. It delivers precision voltage regulation in high-reliability aerospace, defense, and industrial power supply monitoring circuits.
For engineers reviewing the 1N4620UR-1 datasheet, 1N4620UR-1 pinout, 1N4620UR-1 application, or 1N4620UR-1 equivalent, key selection criteria include its hermetically sealed MELF construction, metallurgical bond reliability, low noise density (1 µV/√Hz), JANS-qualified variants, and thermal resistance of 100 °C/W junction-to-end-cap.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable output voltage across wide current (250 mA IZT) and temperature (-65 to +175 °C) ranges. Its DO-213AA package enables high thermal conductivity via end-cap mounting and supports MIL-PRF-19500/435 qualification up to JANS level.
It exhibits a negative temperature coefficient of -0.075 %/°C and minimal capacitance (typical <2 pF per Figure 3), making it suitable for low-noise analog references and precision biasing where stability under thermal stress and ESD immunity (MIL-STD-750 Method 1020) are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 3.3 V at 250 mA - defines regulated output voltage under standard test conditions |
| Power Dissipation | 500 mW - maximum continuous power at TC = 25 °C, derates linearly to zero at 175 °C |
| Dynamic Impedance ZZT | 1650 Ω - small-signal AC impedance in breakdown, impacts regulation accuracy under load transients |
| Reverse Leakage IR | 3.5 µA at 1.5 V - ensures low standby current in high-impedance reference paths |
| Noise Density | 1 µV/√Hz - ultra-low broadband noise ideal for precision analog sensing and metrology |
| Temp Coefficient αVZ | -0.075 %/°C - predictable, stable drift behavior over full operating range |
| Junction Temp Range | -65 to +175 °C - supports operation in extreme environments including space and avionics |
Pinout & Package
DO-213AA (SOD-80 / CDLL34) MELF glass package: hermetically sealed, cylindrical, metallurgically bonded, cathode indicated by single band; terminals are axial end caps - no discrete pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode End Cap | Regulated Output Terminal | Banded end - connects to regulated voltage node; polarity must be observed for proper Zener conduction |
| Anode End Cap | Reference Ground Terminal | Unbanded end - ties to circuit ground or lower-potential rail during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic Glass MELF Construction | DO-213AA package provides moisture resistance, long-term parameter stability, and radiation hardness per MicroNote 050 |
| Metallurgical Bonding | Internal metal-to-semiconductor bond ensures mechanical robustness and thermal cycling reliability up to JANS level |
| Low Noise Performance | 1 µV/√Hz noise density at 3.3 V enables use in high-fidelity analog references without added filtering |
| MIL-PRF-19500/435 Qualification | Available in JAN, JANTX, JANTXV, and JANS screening levels - validated for mission-critical military and space applications |
| ESD Immunity | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in board-level design |
Applications
| Avionics Power Monitoring | Satellite DC-DC Reference |
|---|---|
Use Scenario: Real-time monitoring of 28 V aircraft bus voltage with fault detection thresholds. IC Role / Device Role / Timing Role: Zener diode providing stable 3.3 V reference for comparator input in overvoltage/undervoltage detection circuit. Use Value: Hermetic DO-213AA package ensures reliability across -65 to +175 °C thermal cycles and vibration profiles per DO-160. |
Use Scenario: Precision voltage reference for ADCs measuring solar array output in LEO satellite power systems. IC Role / Device Role / Timing Role: Low-noise 3.3 V Zener reference source for 16-bit SAR ADC front-end biasing. Use Value: 1 µV/√Hz noise density and radiation-hardened structure prevent measurement drift in total ionizing dose (TID) environments. |
| Industrial PLC Analog Input | Nuclear Instrumentation Biasing |
Use Scenario: Isolated 4–20 mA loop-powered sensor interface requiring stable internal reference. IC Role / Device Role / Timing Role: Zener regulator supplying excitation voltage to precision current-sense resistor network. Use Value: 500 mW power rating and 100 °C/W RθJEC enable direct end-cap heatsinking on FR4 PCB without thermal vias. |
Use Scenario: High-stability bias voltage for gamma-ray detector preamplifiers in reactor control instrumentation. IC Role / Device Role / Timing Role: Low-drift 3.3 V reference for FET gate bias in charge-sensitive amplifier stages. Use Value: -0.075 %/°C tempco and inherent radiation hardness ensure calibration retention after 100 krad(Si) exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDLL4620-1 | Commercial-grade version; same 3.3 V VZ, 1650 Ω ZZT, but RoHS-compliant matte-tin plating and no MIL screening. | Lacks JAN/JANS qualification; not approved for flight or safety-critical systems. | Select when cost-sensitive commercial designs require identical electrical specs without military reliability testing. |
| 1N4620UR-1e3 | RoHS-compliant variant of same part; identical electrical and thermal specs, with annealed matte-tin terminations. | Same reliability level as base 1N4620UR-1, but required for EU/China RoHS-regulated programs. | Choose for new designs targeting global compliance while maintaining full MIL-PRF-19500/435 qualification and performance. |
Compared with CDLL4620-1 and 1N4620UR-1e3, the 1N4620UR-1 offers full military screening (JAN–JANS) and legacy tin-lead plating, enabling drop-in replacement in existing qualified hardware without requalification - whereas CDLL4620-1 sacrifices reliability for cost, and 1N4620UR-1e3 adds RoHS compliance without compromising qualification level.
Availability
1N4620UR-1 is available at Aetrix Electronics and suitable for avionics power monitoring, satellite DC-DC reference, and nuclear instrumentation biasing requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4620UR-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 1N4620UR-1 belongs to Microsemi's legacy MIL-qualified Zener diode family designed for precision voltage regulation in mission-critical systems where long-term stability, radiation tolerance, and thermal resilience are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4620UR-1?
The 1N4620UR-1 has a nominal Zener voltage of 3.3 V with a standard tolerance of ±5%, as defined in the JEDEC specification and confirmed in the Electrical Characteristics table on page 4 of T4-LDS-0245 Rev. 2. This tolerance applies under thermal equilibrium at 25 °C with 250 mA test current.
Is 1N4620UR-1 suitable for high-reliability space applications?
Yes - the 1N4620UR-1 is qualified per MIL-PRF-19500/435 up to JANS level, features hermetic DO-213AA packaging, and is inherently radiation-hardened per Microsemi MicroNote 050. These attributes make the 1N4620UR-1 appropriate for LEO and GEO satellite power regulation and telemetry subsystems.
What is the maximum reverse leakage current for 1N4620UR-1?
The 1N4620UR-1 specifies a maximum reverse leakage current (IR) of 3.5 µA at 1.5 V reverse voltage, measured at 25 °C. This value is confirmed in the Electrical Characteristics table (page 4) and reflects tight control for low-power reference applications.
Does 1N4620UR-1 have a specified noise density?
Yes - the 1N4620UR-1 has a maximum noise density (ND) of 1 µV/√Hz at its 3.3 V Zener voltage and 250 mA test current, as stated in the Electrical Characteristics table. This ultra-low noise enables use in precision analog signal chains without additional filtering.
What package type does 1N4620UR-1 use, and how is polarity marked?
The 1N4620UR-1 uses the DO-213AA (MELF) glass package with axial end-cap terminals. Polarity is marked by a single cathode band on one end cap; the banded end must be held positive relative to the unbanded anode end for proper Zener regulation, as specified in the Mechanical and Packaging section (page 2).
1N4620UR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1650 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 1.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N4620UR-1 FAQ
1.How can I place an order for 1N4620UR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4620UR-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 1N4620UR-1 reliable?
The price and inventory of 1N4620UR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4620UR-1 is usually 5 days.
3.What payment methods are accepted for 1N4620UR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4620UR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4620UR-1?
1N4620UR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4620UR-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 1N4620UR-1?
For technical support, including 1N4620UR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4620UR-1 requirements.
6.How does Aetrix verify that 1N4620UR-1 is sourced from the original manufacturer or authorized distributors?
All 1N4620UR-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 1N4620UR-1 meets industry standards.
7.What is the process for return or replacement of 1N4620UR-1?
All 1N4620UR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4620UR-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 1N4620UR-1 part is unused and in its original packaging.
Return procedure for 1N4620UR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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