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Product Detailed Parameters
- Description：TRANS 4NPN DARL 60V 1.2A 20-SO
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Transistor Type：4 NPN Darlington (Quad)
- Current - Collector (Ic) (Max)：1.2A
- Voltage - Collector Emitter Breakdown (Max)：60V
- Vce Saturation (Max) @ Ib, Ic：-
- Current - Collector Cutoff (Max)：-
- DC Current Gain (hFE) (Min) @ Ic, Vce：-
- Power - Max：-
- Frequency - Transition：-
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：20-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：20-SO
- Grade：-
- Qualification：-
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Overview
The L6221CD is a dual BJT array manufactured by STMicroelectronics, featuring four NPN Darlington transistors in a single surface-mount package. It provides a maximum collector-emitter breakdown voltage of 60V and a continuous collector current of 1.2A per transistor. The device is housed in a 20-SOIC (SO24) package with a width of 7.50mm. It operates within a junction temperature range of -40°C to 150°C. The component complies with RoHS3 standards and has a moisture sensitivity level of 3.
Feature Summary
- Integrates four NPN Darlington pairs for high current gain applications
- Includes thermal shutdown protection for enhanced reliability
- Supports surface mount assembly on standard PCB layouts
Applications
- Relay driver circuits
- High-current switching loads
- Industrial control interfaces
Procurement Notes
Verify the specific suffix against the manufacturer's official documentation to confirm pinout compatibility and electrical ratings. Confirm end-of-life status with authorized distributors as availability may be limited. Ensure storage conditions adhere to the specified moisture sensitivity level before reflow soldering to prevent package damage during assembly.
Selection Notes
Select this component when high current drive capability is required from low-power logic signals. The Darlington configuration offers significant current amplification suitable for driving relays or solenoids. Verify that the 60V voltage rating exceeds the maximum load voltage in the target circuit design to ensure safe operation under all conditions.
Part Context
This part belongs to the L6221 series of power transistor arrays designed for robust industrial applications. It serves as a bridge between microcontroller outputs and higher power actuators. The SO24 package allows for compact integration in space-constrained designs while maintaining adequate thermal dissipation characteristics for continuous operation.
Replacement Considerations
Check for direct pin-compatible alternatives within the same family. Verify that any substitute maintains the 60V Vceo and 1.2A Ic specifications. Ensure the replacement package matches the 20-SOIC footprint and thermal requirements of the original design.
