2ST2121

Description：TRANS PNP 250V 17A TO-3
Series：-

SKU:3172f81d2756 Category: Single Bipolar Transistors Brand: STMicroelectronics

Consult the customer manager about the wholesale price.

consultation hotline：86-132-6715-2157

email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.

Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.

Product introduction

2ST2121 is listed in the Single Bipolar Transistors range at ChipApex. The manufacturer field lists STMicroelectronics. Its product description is TRANS PNP 250V 17A TO-3. Review the specifications below when checking this part for your BOM.

Single Bipolar Transistors specifications for 2ST2121

Description：TRANS PNP 250V 17A TO-3
Series：-
Mfr：STMicroelectronics
Package：Bag
Transistor Type：PNP
Current - Collector (Ic) (Max)：17 A
Voltage - Collector Emitter Breakdown (Max)：250 V
Vce Saturation (Max) @ Ib, Ic：3V @ 800mA, 8A
Current - Collector Cutoff (Max)：5µA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce：80 @ 1A, 5V
Power - Max：250 W
Frequency - Transition：25MHz
Operating Temperature：200°C (TJ)
Mounting Type：Through Hole
Package / Case：TO-204AA, TO-3
Supplier Device Package：TO-3
Grade：-
Qualification：-

Single Bipolar Transistors datasheet and documents for 2ST2121

2ST2121

Single Bipolar Transistors Overview

The 2ST2121 is a high-power PNP epitaxial planar bipolar transistor manufactured using BiT-LA technology. It features a collector-emitter voltage (VCEO) of -250 V and a continuous collector current (IC) of -17 A. The device delivers a typical transition frequency (fT) of 25 MHz and supports a total dissipation of 250 W at 25 °C case temperature. It operates with a maximum junction temperature of 200 °C and includes an ECOPACK lead-free package option.

Single Bipolar Transistors Feature Summary

High breakdown voltage capability for robust power handling
BiT-LA technology ensures good gain linearity behavior
Fully characterized performance up to 125 °C

Single Bipolar Transistors Applications

Audio power amplifiers

Single Bipolar Transistors Procurement Notes

Verify the obsolete status of this component before initiating any design or procurement activities. Confirm availability through authorized distributors or secondary markets, as standard supply channels may no longer stock this part. Ensure that any replacement strategy accounts for the long-term availability constraints associated with discontinued semiconductor devices.

Single Bipolar Transistors Selection Notes

Select this component only if its specific high-voltage and high-current characteristics align precisely with the application requirements. Consider the TO-3 package form factor and thermal management needs due to the 250 W dissipation rating. Evaluate the compatibility with existing circuit designs, noting its complementary relationship with the 2ST5949 NPN transistor for push-pull configurations.

Single Bipolar Transistors Part Context

This device belongs to STMicroelectronics' portfolio of high-power bipolar transistors designed for linear amplifier applications. It utilizes specialized BiT-LA technology to achieve superior gain linearity compared to standard planar transistors. The product is housed in a TO-3 package, providing mechanical robustness suitable for industrial and audio equipment environments requiring high thermal stability.