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

onsemi 2SA1552T-H

Name: 2SA1552T-H
Brand: onsemi
SKU: 2SA1552T-H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SA1552T-H

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-251-3 Short Leads, IPAK, TO-251AA

Datasheet:: 2SA1552T-H.pdf

Description:: TRANS PNP 160V 1.5A TP

Quantity:: RFQ Add To RFQ list

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Inventory:242,100

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Product details

Overview

2SA1552T-H from onsemi is a PNP bipolar junction transistor (BJT) designed for high-voltage, medium-current switching in power conversion stages. It delivers V_CEO = −160 V, I_C = −1.5 A, V_CE(sat) = −0.13 V (typ) at I_C = −500 mA / I_B = −50 mA, and f_T = 120 MHz - enabling compact, efficient audio output and inverter circuits in color TV and industrial converters.

For engineers reviewing the 2SA1552T-H datasheet, pinout, applications, or equivalent options, key selection criteria include its TP package with exposed collector terminals, Pb-free and halogen-free compliance, low saturation voltage under high current, and verified switching performance (t_on = 60 ns, t_f = 50 ns).

Technical Context

This PNP transistor employs FBET and MBIT fabrication processes to achieve high breakdown voltage and ultrahigh-speed switching. Its dual-collector TP package supports thermal dissipation up to 15 W at T_c = 25°C while maintaining low V_CE(sat) across I_C = −100 mA to −1.5 A.

The device is specified with h_FE = 140–400 (rank S/T), V_(BR)CBO = −180 V, and Cob = 12 pF (typ) at V_CB = −10 V - confirming suitability for hard-switched DC-DC topologies where voltage margin, gain stability, and capacitance-limited rise time are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−160 V: Withstands full bus voltage in 120–160 V DC link inverters without avalanche conduction.
I_C	−1.5 A continuous: Supports audio output stage loads up to 15 W into 8 Ω with thermal headroom.
V_CE(sat)	−0.13 V (typ): Reduces conduction loss by >40% vs. legacy PNP transistors at 500 mA, improving efficiency.
f_T	120 MHz: Enables clean square-wave switching at ≥500 kHz PWM frequencies in resonant converters.
t_on/t_f	60 ns / 50 ns: Minimizes switching transition losses and EMI generation in high-frequency inverters.
Cob	12 pF (typ): Low output capacitance preserves bandwidth and reduces Miller effect in driver-stage amplifiers.
h_FE	140–400 (rank S/T): Wide gain range allows stable bias design across production lots without recalibration.

Pinout & Package

2SA1552T-H uses the TP (TO-251) surface-mount package: 4-pin, single-ended leadframe with two collector terminals (pins 2 and 4) for enhanced current handling and thermal path. Package outline conforms to JEITA SC-64 and JEDEC TO-251 standards.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input; requires ≤50 mA base drive for full saturation at 500 mA collector current.
2	Collector	Main high-current output node; electrically tied to pin 4 for parallel current sharing and thermal spreading.
3	Emitter	Common emitter reference; connects to negative rail or ground return path in PNP switch configurations.
4	Collector	Redundant collector terminal; must be connected to same net as pin 2 to maintain rated I_C and P_C.

Key Features

Feature	Design Value
FBET/MBIT process technology	Enables simultaneous high V_CEO, low V_CE(sat), and fast f_T - unattainable with standard BJT processes.
Dual-collector TP package	Provides 2× current-carrying capacity per device and lowers thermal resistance vs. conventional 3-pin TO-251.
Ultrahigh-speed switching	60 ns turn-on and 50 ns fall time allow operation beyond 1 MHz in Class-D audio and soft-switched SMPS.
Pb-free and halogen-free (2SA1552T-H)	Meets IPC-J-STD-609A Class 1 and IEC 61249-2-21 requirements for RoHS-compliant industrial assembly.
Low-output capacitance (12 pF)	Minimizes gate-drive loading in cascode configurations and improves stability in broadband amplifier feedback loops.

Applications

Color TV Audio Output Stage	Industrial DC-DC Converter Switch
Use Scenario: Final push-pull stage driving 8 Ω speaker load in analog CRT television sets. IC Role / Device Role / Timing Role: PNP switching transistor in complementary pair with NPN 2SC4027T-H; handles negative half-cycle with precise gain matching. Use Value: V_CE(sat) ≤ −0.45 V at −500 mA ensures <1.5 W dissipation per device, eliminating need for heatsinks in space-constrained chassis.	Use Scenario: High-side switch in 48 V → 12 V isolated flyback converter for factory automation controllers. IC Role / Device Role / Timing Role: Primary-side PNP switch controlling transformer energy transfer; synchronized to 200 kHz PWM controller. Use Value: −160 V V_CEO provides 33% voltage margin above 120 V reflected clamp spikes, preventing premature failure.
Inverter Motor Drive Half-Bridge	High-Voltage Power Supply Regulator
Use Scenario: Low-side commutation switch in 3-phase BLDC inverter for HVAC blower motors (≤1 kW). IC Role / Device Role / Timing Role: PNP BJT in totem-pole gate driver output stage; supplies fast turn-off current to MOSFET gates. Use Value: 120 MHz f_T and 50 ns fall time ensure <100 ns gate discharge, enabling <500 ns dead-time control without shoot-through risk.	Use Scenario: Series pass element in linear-regulated 100 V DC power supply for test equipment. IC Role / Device Role / Timing Role: High-voltage series regulator transistor dissipating up to 10 W continuously at ambient 75°C. Use Value: 15 W P_C rating at T_c = 25°C and SOA curve supporting 1.5 A @ 60 V enables stable regulation without forced air cooling.

Color TV Audio Output Stage

Industrial DC-DC Converter Switch

Use Scenario: Final push-pull stage driving 8 Ω speaker load in analog CRT television sets.

IC Role / Device Role / Timing Role: PNP switching transistor in complementary pair with NPN 2SC4027T-H; handles negative half-cycle with precise gain matching.

Use Value: V_CE(sat) ≤ −0.45 V at −500 mA ensures <1.5 W dissipation per device, eliminating need for heatsinks in space-constrained chassis.

Use Scenario: High-side switch in 48 V → 12 V isolated flyback converter for factory automation controllers.

IC Role / Device Role / Timing Role: Primary-side PNP switch controlling transformer energy transfer; synchronized to 200 kHz PWM controller.

Use Value: −160 V V_CEO provides 33% voltage margin above 120 V reflected clamp spikes, preventing premature failure.

Inverter Motor Drive Half-Bridge

High-Voltage Power Supply Regulator

Use Scenario: Low-side commutation switch in 3-phase BLDC inverter for HVAC blower motors (≤1 kW).

IC Role / Device Role / Timing Role: PNP BJT in totem-pole gate driver output stage; supplies fast turn-off current to MOSFET gates.

Use Value: 120 MHz f_T and 50 ns fall time ensure <100 ns gate discharge, enabling <500 ns dead-time control without shoot-through risk.

Use Scenario: Series pass element in linear-regulated 100 V DC power supply for test equipment.

IC Role / Device Role / Timing Role: High-voltage series regulator transistor dissipating up to 10 W continuously at ambient 75°C.

Use Value: 15 W P_C rating at T_c = 25°C and SOA curve supporting 1.5 A @ 60 V enables stable regulation without forced air cooling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-voltage switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SA1552S-H	Same TP package and electrical specs, but rank S h_FE = 140–280 (vs. T: 200–400); identical V_CEO, V_CE(sat), f_T.	Suitable where tighter h_FE tolerance is required for fixed-bias designs; lower gain may reduce base drive margin in high-temp operation.	Select 2SA1552S-H when circuit stability over temperature demands narrower h_FE spread; otherwise 2SA1552T-H offers higher minimum gain.
MJD2955RLG	TO-252 (DPAK) package; V_CEO = −60 V, I_C = −10 A, V_CE(sat) = −1.2 V (typ) - lower voltage rating, higher current, higher saturation loss.	Applicable only in ≤60 V systems; unsuitable for 120+ V bus applications due to insufficient breakdown margin.	Choose MJD2955RLG only for low-voltage, high-current motor drivers where 2SA1552T-H's −160 V rating is unnecessary overhead.

Compared with 2SA1552S-H and MJD2955RLG, the 2SA1552T-H uniquely balances −160 V breakdown, −0.13 V low-saturation, and 120 MHz bandwidth in a thermally optimized TP package - making it irreplaceable in compact, high-efficiency 100–160 V switching applications where voltage margin and speed are co-critical.

Availability

2SA1552T-H is available at Aetrix Electronics and suitable for color TV audio output stages, industrial DC-DC converters, and inverter motor drives requiring stable component supply with Pb-free and halogen-free compliance.

Supply support for 2SA1552T-H 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The 2SA1552T-H belongs to onsemi's high-voltage bipolar transistor product line, engineered specifically for compact, high-reliability switching in power conversion and audio amplification systems operating up to −160 V.

FAQ

What is the package type and lead count of the 2SA1552T-H?

The 2SA1552T-H uses the TP (TO-251) surface-mount package with four terminals: pins 1 (Base), 2 (Collector), 3 (Emitter), and 4 (Collector). Pins 2 and 4 are internally connected collectors, enabling higher current handling and improved thermal conduction compared to standard 3-pin variants. This configuration is explicitly confirmed in the official onsemi datasheet No.2262.

What does the "T-H" suffix indicate in 2SA1552T-H?

The "T" denotes the h_FE rank (200–400), and "H" signifies Pb-free and halogen-free construction per IEC 61249-2-21. This distinguishes 2SA1552T-H from "E"-suffixed versions (Pb-free only) and "S"-rank variants (h_FE = 140–280). All TP-packaged 2SA1552T-H units ship in 500 pcs./bag packaging.

Can the 2SA1552T-H replace the 2SA1552S-H in an existing design?

Yes - the 2SA1552T-H is a direct functional replacement for the 2SA1552S-H with identical package, pinout, absolute maximum ratings, and most electrical characteristics. The only difference is higher minimum h_FE (200 vs. 140), which improves base drive margin and thermal stability. No PCB or schematic changes are needed.

What is the maximum power dissipation of the 2SA1552T-H at case temperature 25°C?

The 2SA1552T-H has a maximum collector dissipation (P_C) of 15 W when mounted on a heatsink at T_c = 25°C, as specified in the Absolute Maximum Ratings table of the onsemi datasheet No.2262. At ambient temperature (T_a = 25°C) with no heatsink, P_C drops to 1 W - underscoring the necessity of proper thermal design for high-power operation.

Is the 2SA1552T-H suitable for use in Class-D audio amplifier output stages?

Yes - the 2SA1552T-H is explicitly cited in the datasheet for color TV audio output applications and features 120 MHz f_T, 60 ns t_on, and 50 ns t_f, enabling clean switching at typical Class-D carrier frequencies (300–500 kHz). Its low V_CE(sat) minimizes conduction loss, and dual-collector TP package supports robust thermal management in sealed enclosures.

2SA1552T-H Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-251-3 Short Leads, IPAK, TO-251AA

Packaging:: Bulk

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 1.5 A

Voltage - Collector Emitter Breakdown (Max):: 160 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 50mA, 500mA

Current - Collector Cutoff (Max):: 1µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 100mA, 5V

Power - Max:: 1 W

Frequency - Transition:: 120MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TP

2SA1552T-H FAQ

1.How can I place an order for 2SA1552T-H through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SA1552T-H 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 2SA1552T-H reliable?

The price and inventory of 2SA1552T-H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SA1552T-H is usually 5 days.

3.What payment methods are accepted for 2SA1552T-H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SA1552T-H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SA1552T-H?

2SA1552T-H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SA1552T-H 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 2SA1552T-H?

For technical support, including 2SA1552T-H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SA1552T-H requirements.

6.How does Aetrix verify that 2SA1552T-H is sourced from the original manufacturer or authorized distributors?

All 2SA1552T-H 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 2SA1552T-H meets industry standards.

7.What is the process for return or replacement of 2SA1552T-H?

All 2SA1552T-H units undergo pre-shipment inspection (PSI). If there is an issue with 2SA1552T-H, 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 2SA1552T-H part is unused and in its original packaging.

Return procedure for 2SA1552T-H:

1.Submit a request within 90 days.

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

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