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

onsemi SBSP52T1G

Name: SBSP52T1G
Brand: onsemi
SKU: SBSP52T1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SBSP52T1G

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: SBSP52T1G.pdf

Description:: TRANS NPN DARL 80V 1A SOT223

Quantity:: RFQ Add To RFQ list

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Inventory:6,900

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Product details

Overview

SBSP52T1G from onsemi is an NPN small-signal Darlington transistor in SOT-223 package, rated for 80 V V_CES, 1.0 A I_C, and 1.25 W P_D (with 1 cm² pad), designed for medium-power switching in relay, solenoid, lamp, and print hammer drivers.

For engineers reviewing the SBSP52T1G datasheet, pinout, applications, or equivalent options, key selection factors include its Darlington gain (h_FE ≥ 1000 at 150 mA), low saturation voltage (V_CE(sat) ≤ 1.3 V), thermal resistance (R_JA = 100 °C/W with 1 cm² pad), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This device implements a two-stage NPN Darlington configuration to deliver high DC current gain while maintaining single-package integration. Its internal structure enables base drive current reduction by ~1000× compared to standard NPN transistors at matched collector current levels.

It operates as a saturated switch under conditions defined by V_CE(sat) ≤ 1.3 V at I_C = 500 mA / I_B = 0.5 mA and supports fast switching with t_r = 155 ns, t_d = 205 ns, t_s = 420 ns, and t_f = 365 ns under specified test conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CES	80 V - Maximum allowable collector-emitter voltage before breakdown in common-emitter configuration
I_C	1.0 A - Continuous DC collector current rating at T_C = 25°C
h_FE	≥1000 - Minimum DC current gain at I_C = 150 mA, V_CE = 10 V, enabling low-base-drive switching
V_CE(sat)	≤1.3 V - Collector-emitter voltage drop in saturation at I_C = 500 mA / I_B = 0.5 mA, limiting conduction loss
R_JA	100 °C/W - Junction-to-ambient thermal resistance with 1 cm² copper pad, defining power derating slope
t_s	420 ns - Storage time under specified switching conditions, critical for turn-off delay in inductive loads

Pinout & Package

The SBSP52T1G is housed in a surface-mount SOT-223 (Case 318E) package with four terminals: pins 1 (Base), 2 and 4 (Collector), and 3 (Emitter). The dual-collector configuration supports higher current handling and improved thermal path via the exposed metal tab.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input terminal; requires ~0.5 mA base current to saturate 500 mA collector load
2 & 4	Collector	Power output node; electrically connected internally; mounted to exposed thermal pad for heat dissipation
3	Emitter	Reference/return path; tied to system ground in low-side switch configurations

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control modules and body electronics requiring PPAP compliance
SOT-223 thermal performance	100 °C/W R_JA with 1 cm² pad enables 1.25 W continuous dissipation without forced cooling
Darlington h_FE ≥ 1000	Reduces required base drive current by three orders of magnitude vs. single NPN, simplifying driver circuitry
Pb-free, Halogen-free, RoHS compliant	Meets global environmental regulations and supports lead-free reflow/wave soldering processes

Applications

Automotive Relay Driver	Industrial Solenoid Control
Use Scenario: Driving 12 V automotive relays in power distribution units where space-constrained PCBs require high-gain switching. IC Role / Device Role / Timing Role: Low-side NPN Darlington switch providing galvanic isolation between microcontroller GPIO and relay coil. Use Value: Enables direct MCU GPIO drive (e.g., 3.3 V/20 mA) to switch 500 mA relay coils without external buffer stages.	Use Scenario: Controlling pneumatic/hydraulic solenoids in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Medium-power interface transistor translating logic-level signals into solenoid actuation current. Use Value: Delivers 1 A peak current with <1.3 V saturation drop, minimizing power loss and self-heating during extended duty cycles.
Printer Hammer Actuator	Lamp Load Switching
Use Scenario: Pulse-driving electromagnetic print hammers in legacy dot-matrix printers requiring fast, high-current transients. IC Role / Device Role / Timing Role: High-gain switching element delivering short-duration 500–800 mA pulses to hammer coils. Use Value: Achieves 155 ns rise time and 365 ns fall time, supporting >1 kHz hammer actuation rates without thermal accumulation.	Use Scenario: Switching incandescent or halogen lamps (up to 10 W) in architectural lighting controls and signage systems. IC Role / Device Role / Timing Role: Robust, thermally stable NPN Darlington used in low-frequency on/off lamp control. Use Value: Withstands repetitive inrush currents and operates reliably across −65°C to +150°C ambient range, ensuring outdoor fixture longevity.

Automotive Relay Driver

Industrial Solenoid Control

Use Scenario: Driving 12 V automotive relays in power distribution units where space-constrained PCBs require high-gain switching.

IC Role / Device Role / Timing Role: Low-side NPN Darlington switch providing galvanic isolation between microcontroller GPIO and relay coil.

Use Value: Enables direct MCU GPIO drive (e.g., 3.3 V/20 mA) to switch 500 mA relay coils without external buffer stages.

Use Scenario: Controlling pneumatic/hydraulic solenoids in factory automation PLC I/O modules.

IC Role / Device Role / Timing Role: Medium-power interface transistor translating logic-level signals into solenoid actuation current.

Use Value: Delivers 1 A peak current with <1.3 V saturation drop, minimizing power loss and self-heating during extended duty cycles.

Printer Hammer Actuator

Lamp Load Switching

Use Scenario: Pulse-driving electromagnetic print hammers in legacy dot-matrix printers requiring fast, high-current transients.

IC Role / Device Role / Timing Role: High-gain switching element delivering short-duration 500–800 mA pulses to hammer coils.

Use Value: Achieves 155 ns rise time and 365 ns fall time, supporting >1 kHz hammer actuation rates without thermal accumulation.

Use Scenario: Switching incandescent or halogen lamps (up to 10 W) in architectural lighting controls and signage systems.

IC Role / Device Role / Timing Role: Robust, thermally stable NPN Darlington used in low-frequency on/off lamp control.

Use Value: Withstands repetitive inrush currents and operates reliably across −65°C to +150°C ambient range, ensuring outdoor fixture longevity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN Darlington transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT5210LT1G	Lower V_CES (60 V), lower I_C (0.5 A), no AEC-Q101 qualification, SOT-23 package	Not suitable for 80 V relay coils or automotive environments; limited to low-power consumer switching	Select only for cost-sensitive, non-automotive, sub-500 mA applications where board space is critical
ZTX951	Higher V_CES (100 V), TO-92 package, no integrated Darlington gain spec, higher V_CE(sat) (1.5 V min)	Requires external base resistor network for gain control; unsuitable for compact SMT layouts	Prefer when through-hole mounting is required and higher voltage margin outweighs SMT assembly benefits

Compared with MMBT5210LT1G and ZTX951, the SBSP52T1G provides superior combination of automotive qualification, SMT-compatible thermal design, and guaranteed Darlington gain-making it optimal for space-constrained, high-reliability medium-power switching where consistent low-base-drive operation is essential.

Availability

SBSP52T1G is available at Aetrix Electronics and suitable for automotive relay drivers, industrial solenoid controllers, and printer actuator circuits requiring stable component supply and long-term lifecycle support.

Supply support for SBSP52T1G 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

onsemi is a global semiconductor manufacturer focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.

The SBSP52T1G belongs to onsemi's medium-power discrete transistor product line, engineered specifically for robust, high-gain switching in automotive and industrial control systems where reliability under thermal stress is critical.

FAQ

What is the maximum collector current rating for SBSP52T1G?

The SBSP52T1G has a maximum continuous collector current (I_C) rating of 1.0 A at T_C = 25°C. Derating applies above this temperature per the datasheet's 10 mW/°C slope for the 1 cm² pad mounting condition. This rating ensures safe operation in relay and solenoid driver applications where peak loads reach 500–800 mA.

Is SBSP52T1G qualified for automotive use?

Yes, SBSP52T1G is AEC-Q101 qualified and PPAP capable. The "S" prefix denotes compliance with automotive-specific site and control change requirements. It is rated for operation from −65°C to +150°C and supports automotive body electronics, power distribution, and engine control modules requiring validated reliability.

What is the pin configuration of SBSP52T1G?

The SBSP52T1G uses a 4-pin SOT-223 package with pin 1 as Base, pins 2 and 4 as Collector (internally connected), and pin 3 as Emitter. The exposed metal tab is electrically connected to the Collector and serves as the primary thermal path-must be soldered to a large copper area for optimal R_JA = 100 °C/W performance.

How does SBSP52T1G differ from BSP52T1G?

The SBSP52T1G and BSP52T1G share identical electrical specifications and package, but the "S" prefix indicates enhanced process control, unique site traceability, and full AEC-Q101 qualification. BSP52T1G is commercial-grade; SBSP52T1G is automotive-grade with stricter lot-level testing and PPAP documentation support.

What is the typical DC current gain (h_FE) of SBSP52T1G at operating conditions?

The SBSP52T1G guarantees h_FE ≥ 1000 at I_C = 150 mA and V_CE = 10 V, with typical values reaching 2000. At I_C = 500 mA, h_FE remains ≥ 1000, enabling reliable low-base-drive switching. This Darlington gain allows direct interfacing with microcontroller outputs without additional driver stages.

SBSP52T1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN - Darlington

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

Voltage - Collector Emitter Breakdown (Max):: 80 V

Vce Saturation (Max) @ Ib, Ic:: 1.3V @ 500µA, 500mA

Current - Collector Cutoff (Max):: 10µA

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

Power - Max:: 800 mW

Frequency - Transition:: -

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223 (TO-261)

SBSP52T1G FAQ

1.How can I place an order for SBSP52T1G through Aetrix?

Please submit a Request for Quotation (RFQ) for SBSP52T1G 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 SBSP52T1G reliable?

The price and inventory of SBSP52T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBSP52T1G is usually 5 days.

3.What payment methods are accepted for SBSP52T1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBSP52T1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SBSP52T1G?

SBSP52T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SBSP52T1G 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 SBSP52T1G?

For technical support, including SBSP52T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBSP52T1G requirements.

6.How does Aetrix verify that SBSP52T1G is sourced from the original manufacturer or authorized distributors?

All SBSP52T1G 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 SBSP52T1G meets industry standards.

7.What is the process for return or replacement of SBSP52T1G?

All SBSP52T1G units undergo pre-shipment inspection (PSI). If there is an issue with SBSP52T1G, 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 SBSP52T1G part is unused and in its original packaging.

Return procedure for SBSP52T1G:

1.Submit a request within 90 days.

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

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