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Product Detailed Parameters
- Description：TRANS NPN 120V 2A TO-220
- Series：-
- Mfr：Bourns Inc.
- Package：Tube
- Transistor Type：NPN
- Current - Collector (Ic) (Max)：2:00 AM
- Voltage - Collector Emitter Breakdown (Max)：120 V
- Vce Saturation (Max) @ Ib, Ic：700mV @ 200mA, 1A
- Current - Collector Cutoff (Max)：200µA
- DC Current Gain (hFE) (Min) @ Ic, Vce：15 @ 1A, 4V
- Power - Max：2 W
- Frequency - Transition：-
- Operating Temperature：-
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220
- Grade：-
- Qualification：-
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Overview
The BD239D-S is an obsolete NPN silicon power transistor manufactured by Bourns Inc. It features a collector-emitter breakdown voltage of 120 V and a maximum continuous collector current of 2 A. The device is housed in a TO-220-3 package, which supports a maximum power dissipation of 2 W. This component was designed for general-purpose switching and amplification applications requiring moderate power handling capabilities within the specified voltage and current limits.
Feature Summary
- NPN silicon construction for reliable switching performance
- TO-220-3 through-hole package for efficient heat dissipation
- Designed for general-purpose amplifier and switch circuits
Applications
- General-purpose switching circuits
- Amplifier stages
- Power regulation modules
Procurement Notes
This component is officially marked as obsolete and no longer manufactured by Bourns Inc. Procurement should focus on verifying the authenticity of remaining stock from authorized distributors or third-party suppliers. Buyers must confirm that the parts are new, original, and free from damage before acquisition, as availability is limited to existing inventory rather than active production runs.
Selection Notes
Engineers selecting this part should prioritize its specific 120 V and 2 A ratings when designing legacy systems. Due to its obsolete status, alternative sourcing strategies must be implemented. Selection criteria should strictly match the electrical requirements of the original design, ensuring that any substitute components meet or exceed the voltage, current, and thermal specifications defined for the TO-220-3 package.
Part Context
The BD239D-S belongs to the category of single bipolar transistors produced by Bourns Inc. It is a discrete semiconductor device intended for use in electronic circuits where NPN switching functionality is required. The product line typically includes various voltage and current variants, with this specific model representing a mid-range power option in the manufacturer's historical portfolio.
Replacement Considerations
Public confirmed substitutes include the BD239C from STMicroelectronics and onsemi. These alternatives offer similar NPN characteristics and may serve as functional replacements in compatible designs, provided their datasheet parameters align with the original circuit requirements.
