2STR2215 - PNP High Current Density Power Transistor | ST
MPN: 2STR2215 ✓ Active| Qty | Unit Price | Extended |
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2STR2215 Overview
A PNP power transistor is a bipolar junction transistor (BJT) in which the majority current is carried by holes; it is turned on by pulling the base below the emitter potential. In the power-management hierarchy, power BJTs sit alongside MOSFETs and IGBTs as discrete power semiconductors, and PNP types are frequently paired with complementary NPN devices in push-pull outputs, linear regulators, motor drivers, and general-purpose switching circuits.
The defining characteristics of the 2STR2215 are its high current gain, which reduces base-drive requirements and simplifies driver circuitry, and its very low collector-emitter saturation voltage, which reduces on-state power dissipation and improves overall efficiency in switch-mode and low-voltage applications. The fast-switching classification also makes it suitable for applications requiring quick turn-on and turn-off transitions.
The complementary NPN device is the 2STR1215, allowing designers to build matched push-pull or half-bridge stages with symmetric gain and saturation characteristics. This complementary pairing simplifies thermal and electrical matching in class-AB output stages and driver applications.
Typical applications include low-voltage switching regulators, power-supply output stages, motor and actuator drivers, and general-purpose amplification where a robust PNP device with low VCE(sat) is required.
When designing with the 2STR2215, verify the safe operating area against the actual load current and supply voltage, and ensure adequate base-drive current to keep the device in saturation under worst-case load conditions, since insufficient drive raises VCE(sat) and junction temperature.
This page synthesizes verified datasheet information, sourcing guidance, and drop-in alternative analysis not consolidated in the manufacturer datasheet.
Drop-in alternatives for 2STR2215 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
2STR1215
✅ Drop-In📋 Reference alternative (not in catalog)
2STR2215 Maximum Ratings & Electrical Characteristics
| Polarity | PNP |
| Technology | PB-HCD (Power Bipolar High Current Density) |
| Device Type | Low voltage fast-switching power transistor |
| Complementary NPN | 2STR1215 |
| Manufacturer | STMicroelectronics |
2STR2215 standard Pin Configuration Guide
Pin configuration for 2STR2215 (standard package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for 2STR2215.
Refer to the datasheet for full pin configuration.
Safe Operating Area
Typical Applications
2STR2215 is suitable for 6 applications: Low-Voltage Switching Regulators, Power Supply Output Stages, Motor and Actuator Drivers, Audio Output and Amplifier Stages, General-Purpose Switching Circuits, Automotive Body and Power Electronics.
Low-Voltage Switching Regulators
The 2STR2215 fits low-voltage switching regulator output and synchronous stages where its PB-HCD very low saturation voltage directly reduces conduction loss and improves converter efficiency. In a PNP switching position, the high current gain of the PB-HCD process means the PWM or control IC supplies less base current for a given collector load, simplifying drive circuitry and reducing drive-stage dissipation. Fast switching classification supports the quick transitions needed in buck and boost topologies, though designers should confirm switching-time limits against the operating frequency in the ST datasheet. Estimated benefit: replacing a standard PNP with a low-VCE(sat) device can cut conduction losses by tens of percent at the same load current, reducing heatsinking requirements.
Recommended
Power Supply Output Stages
In linear and post-regulator output stages, the 2STR2215 serves as the series pass PNP element where low VCE(sat)/low headroom operation is valuable. The high gain performance from ST's PB-HCD technology allows a lower-power error amplifier or driver to control significant output current, and the very low saturation voltage permits operation with reduced input-to-output differential, improving efficiency. Pairing the 2STR2215 with its complementary 2STR1215 enables symmetric push-pull output stages with matched gain and thermal behavior. Designers should verify the safe operating area for the chosen supply voltage and load current and provide adequate base drive at maximum load to keep the pass device fully enhanced.
Recommended
Motor and Actuator Drivers
For DC motor and actuator drive circuits, the 2STR2215 provides the high-side PNP switching element in H-bridge or unidirectional drive configurations. Its low saturation voltage reduces power dissipation during continuous conduction, which is critical for motor loads that run for extended periods, and its fast switching supports PWM speed control with lower transition losses. The high current gain of PB-HCD technology reduces the base-drive demand from microcontroller driver stages or discrete gate/base drivers. Thermal design should account for stalled-rotor current conditions; verify the datasheet SOA and consider the 2STR1215 as the complementary low-side device for a matched bridge with symmetric switching characteristics.
Recommended
Audio Output and Amplifier Stages
In class-AB audio output stages and medium-power amplifiers, complementary bipolar pairs with matched characteristics are essential for low crossover distortion and symmetric clipping. The 2STR2215 PNP paired with the 2STR1215 NPN gives designers a matched complementary set from the same PB-HCD technology family, ensuring symmetric gain and saturation behavior across the output swing. The high gain performance reduces driver-stage requirements, allowing simpler, lower-cost driver transistors or integrated drivers. Designers should bias the output stage appropriately with thermal compensation (VBE multiplier) and verify power dissipation at maximum continuous output against the datasheet thermal resistance figures.
Recommended
General-Purpose Switching Circuits
For general-purpose high-current switching such as relay drivers, lamp drivers, heater control, and solenoid switching, the 2STR2215 offers a robust PNP option with very low on-state voltage drop from ST's PB-HCD process. High gain means small control currents from logic or op-amp stages can switch substantial loads, and the low saturation voltage keeps device heating low during long on-times. Because it is specified as a fast-switching device, it also suits applications where quick de-energization of inductive loads matters, subject to appropriate flyback/snubber protection. Designers should size base resistors for worst-case gain at temperature and verify load current against datasheet collector-current ratings.
Recommended
Automotive Body and Power Electronics
Low-voltage fast-switching PNP power transistors like the 2STR2215 are used in automotive-adjacent body electronics - lamp drivers, relay control, and actuator interfaces - where 12V-class rails and robust bipolar devices are preferred for their voltage-surge tolerance and simple drive. The PB-HCD technology's very low saturation voltage reduces self-heating in sealed modules with limited cooling, and high gain allows direct drive from low-power control circuitry. Designers must confirm the specific AEC-Q qualification status on the ST product page for the relevant orderable variant, and should verify load-dump and reverse-polarity conditions against the datasheet maximum ratings before deployment in vehicle environments.
Recommended
Recommended Products Summary
Engineering reference data for 2STR2215 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 2STR1215 |
|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics |
| Polarity | PNP | NPN (complementary) |
| Technology | PB-HCD | PB-HCD |
| Switching Class | Fast switching, low voltage | Fast switching, low voltage |
| Typical Application | High-side PNP switching / pass element | Low-side NPN switching / pass element |
Key Differentiators
- PB-HCD high current density technology (vs Conventional PNP power BJTs)
- Matched complementary family (vs 2STR1215)
- Fast-switching classification (vs General-purpose PNP power transistors)
Design Notes
Ensure adequate base drive at maximum collector current. The 2STR2215 achieves its very low saturation voltage only when driven into saturation; if base current is sized from the typical hFE instead of the datasheet minimum gain at the operating current, VCE(sat) rises, dissipation increases, and thermal runaway risk grows in high-temperature environments. Design with the minimum specified gain across the full temperature range.
Estimated: power dissipation equals VCE(sat) x IC during on-state plus switching losses proportional to frequency. With a low-saturation PB-HCD device, conduction loss is typically the dominant term at moderate frequencies. Verify the junction-to-ambient thermal resistance for the actual package in the ST datasheet and size copper pour or heatsink so junction temperature stays well below the maximum rating under worst-case ambient.
Do not substitute the complementary 2STR1215 (NPN) for the 2STR2215 (PNP) without redesigning the drive stage - polarity reversal changes the base drive reference and high/low-side role. Also confirm the exact orderable MPN and package suffix when purchasing, since ST power transistors ship in multiple package variants with different thermal characteristics.
Compliance Information
Compliance status not explicitly stated in the verified web data; confirm RoHS/REACH status on the official STMicroelectronics product page.
