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Product Detailed Parameters
- Description：DIODE CUR REG 50V 14.4MA 500MW
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Tape & Reel (TR),Cut Tape (CT)
- Voltage - Anode - Cathode (Vak)(Max)：50V
- Regulator Current (Max)：14.4mA
- Voltage - Limiting (Max)：3.8V
- Power - Max：500mW
- Applications：Silicon Field Effect
- Operating Temperature：-65°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SOD-123F
- Supplier Device Package：SOD-123FL
- Grade：-
- Qualification：-
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Overview
The CMJH120 TR PBFREE is a surface mount silicon current limiting diode from Central Semiconductor Corp, housed in an SOD-123FL epoxy molded case. It provides a nominal regulator current of 12 mA with a maximum rating of 14.4 mA at 25V. The device supports a peak operating voltage of 50 V and dissipates up to 500 mW. It operates within a junction temperature range of -65°C to +150°C. Key electrical parameters include a minimum dynamic impedance of 0.08 MΩ, a minimum knee impedance of 3.0 kΩ, and a maximum limiting voltage of 3.8 V.
Feature Summary
- Maintains constant current over a wide voltage range using silicon field effect technology.
- Available in low profile SOD-123FL surface mount package for compact designs.
- Offers special selections of regulator current for critical applications.
Applications
- Silicon field effect gate protection
- Constant current sources requiring stable regulation
Procurement Notes
Verify the specific ordering suffix against manufacturer documentation to confirm plating type. The PBFREE suffix indicates lead-free construction. Confirm availability through authorized distributors or direct manufacturer channels, as standard lead times may vary. Ensure the requested quantity matches the reel packaging requirements specified by the supplier.
Selection Notes
Select this component when a precise 12 mA current limit is required within a 50 V operational window. Verify that the thermal resistance of 180 °C/W fits the system's heat dissipation capabilities. Ensure the SOD-123FL footprint aligns with the PCB layout constraints. Check if the temperature coefficient range suits the environmental operating conditions.
Part Context
This part belongs to the CMJ0130 through CMJH220 series of surface mount silicon current regulator diodes. The series covers a broad spectrum of current ratings from 0.13 mA to 25 mA. The CMJH120 specifically targets the higher end of the lower-current applications, bridging the gap between the CMJH100 and CMJH150 variants.
Replacement Considerations
Direct substitutes within the same series include the CMJH100 (10 mA) and CMJH150 (15 mA). Verify that the alternative current rating meets the circuit design requirements before substitution.
FAQ
What is the marking code for the CMJH120?
The marking code for the CMJH120 is 123.
What is the typical thermal resistance of this device?
The typical thermal resistance (ΘJA) is 180 °C/W.
How is the regulator current measured?
The regulator current is measured using a pulsed method where the pulse width in milliseconds equals 27.5 divided by the nominal current in mA.
