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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Infineon Technologies BSP61H6327XTSA1

Name: BSP61H6327XTSA1
Brand: Infineon Technologies
SKU: BSP61H6327XTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BSP61H6327XTSA1

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

Package:: TO-261-4, TO-261AA

Datasheet:: BSP61H6327XTSA1.pdf

Description:: TRANS PNP DARL 60V 1A SOT223-4

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Product details

Overview

BSP61H6327XTSA1 from Infineon Technologies is a PNP silicon Darlington transistor designed for medium-power switching applications, featuring V_CEO = 60 V, I_C = 1 A, V_CE(sat) ≤ 1.8 V at I_C = 1 A / I_B = 1 mA, h_FE ≥ 1000, and SOT-223 package. It serves as a high-gain, low-saturation switch in automotive body control modules and industrial relay drivers.

For engineers reviewing the BSP61H6327XTSA1 datasheet, BSP61H6327XTSA1 pinout, BSP61H6327XTSA1 application, or BSP61H6327XTSA1 equivalent, key selection criteria include guaranteed DC current gain at 500 mA/10 V, thermal resistance R_thJS ≤ 17 K/W, complementary NPN pairing (BSP51), AEC-Q101 qualification, and RoHS-compliant SOT-223 leadframe construction.

Technical Context

This Darlington pair integrates two cascaded PNP transistors on a single die to achieve high h_FE (1000–2000) with minimal base drive current. Its structure enables robust switching of inductive loads up to 1 A while maintaining low V_CE(sat) under sustained conduction.

Designed for automotive-grade reliability, it meets AEC-Q101 stress testing requirements and operates across T_j = –65 °C to 150 °C. The device uses epitaxial base technology and features integrated ESD protection per IEC 61000-4-2 Level 2 (4 kV contact).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines safe operating range for 24 V automotive load switching.
I_C	1 A - Continuous collector current rating; supports driving solenoids, small relays, and LED arrays without external heat sinking below 124 °C case temperature.
h_FE	1000–2000 - DC current gain at I_C = 150–500 mA / V_CE = 10 V; enables microcontroller GPIO-level base drive (≤1 mA) for full 1 A output.
V_CE(sat)	≤1.8 V @ I_C = 1 A, I_B = 1 mA - Low saturation voltage minimizes power loss (≤1.8 W) and thermal rise in high-duty-cycle switching.
R_thJS	≤17 K/W - Junction-to-soldering-point thermal resistance; allows direct PCB copper pour heatsinking for stable operation at 1.5 W total dissipation.
f_T	200 MHz - Transition frequency at I_C = 100 mA / V_CE = 5 V; supports fast turn-on/turn-off in PWM-controlled lighting and motor commutation.

Pinout & Package

SOT-223 package: 4-pin thermally enhanced surface-mount outline with exposed collector tab (Pin 4) for direct PCB thermal coupling. Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter, Pin 4 = Collector (redundant connection).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Base	Control input node; accepts low-current drive (≤1 mA) to enable full collector conduction; requires series resistor for current limiting.
Pin 2	Collector	Main power output terminal; connected internally to Pin 4; routed to load return path or ground-referenced switched supply rail.
Pin 3	Emitter	High-side reference node; tied to positive supply rail in high-side switch configuration; carries full load current.
Pin 4	Collector (thermal pad)	Electrically redundant collector connection; soldered directly to large PCB copper area to dissipate up to 1.5 W with R_thJS ≤ 17 K/W.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements including HTOL, TC, HTRB, and ESD; suitable for under-hood BCM and lighting control.
Complementary NPN pairing	Matched performance with BSP51 (NPN Darlington); enables push-pull output stages and H-bridge driver designs without gain mismatch.
Pb-free & RoHS compliant	Lead-free matte tin plating on SOT-223 leadframe; meets EU Directive 2011/65/EU and JEDEC J-STD-020 reflow profile compatibility.
Low V_CE(sat) at high I_C	1.3 V typical @ I_C = 500 mA / I_B = 0.55 mA; reduces conduction losses by >40% vs. standard PNP transistors in 12 V load switching.

Applications

Automotive Body Control Module

Industrial Relay Driver

Use Scenario: Switching 12 V/24 V solenoid locks, window lift motors, and HVAC actuators in vehicle door modules.

IC Role / Device Role / Timing Role: High-gain PNP Darlington switch providing low-impedance path from battery to load; driven by 3.3 V MCU GPIO via 10 kΩ base resistor.

Use Value: Eliminates need for external driver ICs; achieves <1.8 V drop at 1 A ensures >90% power delivery efficiency to inductive loads.

Use Scenario: Replacing electromechanical relays in PLC I/O modules for 24 V DC output cards.

IC Role / Device Role / Timing Role: Solid-state load switch controlling up to 1 A resistive or inductive loads with µs-scale turn-on/off response.

Use Value: Enables 100 kHz PWM dimming of industrial signage LEDs and eliminates relay chatter, contact wear, and acoustic noise.

LED Lighting Driver

Power Supply Enable Circuit

Use Scenario: Constant-current switching for high-brightness LED strings in commercial downlights and streetlight fixtures.

IC Role / Device Role / Timing Role: High-side current sink controlled by analog/digital dimming signal; configured with emitter-follower feedback for current regulation.

Use Value: Maintains ±3% current accuracy over temperature due to high h_FE stability; supports thermal foldback via V_BE sensing.

Use Scenario: Enabling/disabling auxiliary 5 V or 3.3 V rails in multi-rail embedded power systems.

IC Role / Device Role / Timing Role: Low-leakage, high-V_CEO switch placed between upstream regulator and downstream LDO or DC-DC converter input.

Use Value: ICES ≤ 10 µA prevents standby current leakage; V_CEO = 60 V accommodates transient surges on 24 V input rails.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP Darlington switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCP61TA	V_CEO = 60 V, I_C = 1 A, but h_FE min = 500 (vs. 1000), R_thJS = 20 K/W (vs. ≤17 K/W)	Limited to lower-duty-cycle switching; less suitable for continuous 1 A loads above 85 °C ambient	Select when cost sensitivity outweighs thermal margin or gain stability requirements.
ZTX951	TO-92 package, V_CEO = 60 V, I_C = 1.5 A, h_FE = 750–2000, but R_thJA = 150 K/W (no thermal pad)	Requires external heatsink for >300 mA continuous operation; incompatible with automated SMT assembly	Choose only for through-hole prototyping or legacy board redesign where SOT-223 footprint is unavailable.

Compared with BCP61TA and ZTX951, BSP61H6327XTSA1 delivers superior thermal performance and guaranteed minimum gain for reliable microcontroller-driven switching in space-constrained automotive and industrial PCBs.

Availability

BSP61H6327XTSA1 is available at Aetrix Electronics and suitable for automotive body control modules, industrial relay drivers, LED lighting systems, and power supply enable circuits requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BSP61H6327XTSA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.

The BSP60–BSP62 family targets AEC-Q101-compliant discrete power switches for automotive and industrial environments, emphasizing high gain, low saturation, and thermally robust packaging for replacing mechanical relays and driver ICs.

FAQ

Is BSP61H6327XTSA1 pin-compatible with BSP60 or BSP62?

Yes - all three devices share identical SOT-223 pinout (Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter, Pin 4 = Collector) and footprint. However, V_CEO differs (45 V / 60 V / 80 V), so substitution requires verification of maximum system voltage stress.

What is the maximum allowable base current for continuous operation?

The absolute maximum base current is 100 mA per datasheet. For reliable 1 A collector switching, design base drive to deliver 1 mA (typical) to 2 mA (derated) - exceeding 5 mA offers no gain benefit and increases power dissipation unnecessarily in the base region.

Does BSP61H6327XTSA1 require an external flyback diode when switching inductive loads?

Yes - although the device has inherent junction capacitance, it lacks integrated flyback protection. A fast recovery diode (e.g., BAS21) must be placed across the inductive load (cathode to V_CC, anode to collector) to clamp inductive kickback and prevent V_CEO overshoot beyond 60 V.

Can BSP61H6327XTSA1 be used in linear (analog) amplification mode?

No - it is optimized for saturated switching, not linear operation. Its Darlington structure exhibits poor linearity, high distortion, and unstable bias points outside switching regions. Use dedicated general-purpose PNP transistors (e.g., BC807) for analog amplification.

BSP61H6327XTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: TO-261-4, TO-261AA

Packaging:: Tape & Reel (TR)

Product Status:: Last Time Buy

Transistor Type:: PNP - Darlington

Current - Collector (Ic) (Max):: 1 A

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 1.8V @ 1mA, 1A

Current - Collector Cutoff (Max):: 10µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 2000 @ 500mA, 10V

Power - Max:: 1.5 W

Frequency - Transition:: 200MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SOT223-4

BSP61H6327XTSA1 FAQ

1.How can I place an order for BSP61H6327XTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BSP61H6327XTSA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for BSP61H6327XTSA1 reliable?

The price and inventory of BSP61H6327XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BSP61H6327XTSA1 is usually 5 days.

3.What payment methods are accepted for BSP61H6327XTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BSP61H6327XTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BSP61H6327XTSA1?

BSP61H6327XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BSP61H6327XTSA1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for BSP61H6327XTSA1?

For technical support, including BSP61H6327XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BSP61H6327XTSA1 requirements.

6.How does Aetrix verify that BSP61H6327XTSA1 is sourced from the original manufacturer or authorized distributors?

All BSP61H6327XTSA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BSP61H6327XTSA1 meets industry standards.

7.What is the process for return or replacement of BSP61H6327XTSA1?

All BSP61H6327XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BSP61H6327XTSA1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The BSP61H6327XTSA1 part is unused and in its original packaging.

Return procedure for BSP61H6327XTSA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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