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Product Detailed Parameters
- Description：CURRENT REGULATOR
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Voltage - Anode - Cathode (Vak)(Max)：100V
- Regulator Current (Max)：748µA
- Voltage - Limiting (Max)：1.15V
- Power - Max：500mW
- Applications：-
- Operating Temperature：-65°C ~ 175°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：DO-213AB, MELF (Glass)
- Supplier Device Package：DO-213AB (MELF, LL41)
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 1N5293UR-1 is a surface-mount current regulator diode in the DO-213AB (MELF) package. It provides a nominal regulating current of 0.68 mA with standard tolerances ranging from 0.612 mA to 0.748 mA at a regulator voltage of 25 V. The device operates within a junction temperature range of -65°C to +175°C and dissipates up to 500 mW. Key electrical parameters include a minimum dynamic impedance of 1.35 MΩ, a maximum limiting voltage of 0.335 V, and a working peak voltage of 100 V.
Feature Summary
- Hermetically sealed glass case with internal metallurgical bond for reliability.
- Double-plug construction providing high source impedance and ESD non-sensitivity.
- Qualified per MIL-PRF-19500/463 for JAN, JANTX, JANTXV, and JANS levels.
Applications
- Current regulation over broad operating voltage and temperature ranges.
- Replacement for Zener diodes in applications requiring constant current rather than constant voltage.
- Radiation-hardened environments due to inherent radiation hardness.
Procurement Notes
Verify the specific qualification level required, as the part number suffix indicates the reliability grade. Confirm RoHS compliance status if environmental regulations apply, noting that commercial versions may differ from military grades. Ensure the ordering suffix matches the desired termination finish and regulatory compliance before purchase.
Selection Notes
Select based on the required nominal regulating current, which ranges from 0.22 mA to 4.7 mA across the series. Consider the dynamic impedance and knee impedance requirements for signal integrity. Verify thermal resistance and power dissipation limits against the expected operating temperature and ambient conditions to ensure safe operation within the specified junction temperature range.
Part Context
This component belongs to the 1N5283UR-1 through 1N5314UR-1 series of 0.5 watt current regulators. These devices serve as counterparts to Zener diodes by regulating current over a broad voltage range instead of voltage over a broad current range. The series offers an extensive selection of current values in a compact MELF package suitable for surface mount applications.
Replacement Considerations
Direct replacements include other parts from the 1N5283UR-1 thru 1N5314UR-1 series with matching current ratings. Axial-leaded equivalents such as 1N5283-1 to 1N5314-1 are available but require different mounting considerations. Verify package compatibility when substituting with generic MELF current regulators.
FAQ
What is the nominal regulating current for the 1N5293UR-1?
The nominal regulating current is 0.68 mA at a regulator voltage of 25 V.
Is the 1N5293UR-1 radiation hard?
Yes, the device is inherently radiation hard as described in Microsemi MicroNote 050.
What is the maximum working peak voltage?
The maximum working peak voltage (VWM) is 100 V.
