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

onsemi 2SB1202S-TL-E

Name: 2SB1202S-TL-E
Brand: onsemi
SKU: 2SB1202S-TL-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SB1202S-TL-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: 2SB1202S-TL-E.pdf

Description:: TRANS PNP 50V 3A TP-FA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SB1202S-TL-E from onsemi is a PNP bipolar junction transistor rated for −50 V V_CEO, −3 A I_C, and 1 W at T_C = 25 °C, featuring low V_CE(sat) of −0.35 V at I_C = −2 A / I_B = −100 mA, fast switching (t_on = 70 ns), and housed in a Pb-free DPAK/TP-FA (Case 369AH) package. It is used in relay drivers, lamp drivers, and voltage regulators where compact size and low saturation loss are critical.

For engineers reviewing the 2SB1202S-TL-E datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, confirmed −50 V breakdown rating, validated −3 A continuous current capability, documented DPAK thermal performance (15 W at T_C = 25 °C), and RoHS-compliant packaging with reel-based shipping (700 pcs./reel).

Technical Context

This PNP transistor employs FBET and MBIT processes to achieve wide ASO and large current handling while maintaining low V_CE(sat). Its f_T of 150 MHz supports high-speed switching in power control circuits, and its Cob of 25 pF at V_CB = −10 V enables stable operation in inductive load interfaces.

The device operates within a junction temperature range of −55 °C to +150 °C and delivers h_FE = 100–560 (rank-dependent) at V_CE = −2 V - with minimum h_FE = 35 at I_C = −3 A - ensuring reliable gain across both small-signal and high-current bias conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50 V - maximum safe collector-emitter voltage under open-base condition; defines blocking capability in high-side switch applications.
I_C	−3 A - continuous collector current rating; supports robust load driving without derating at T_C ≤ 25 °C.
V_CE(sat)	−0.35 V (typ.) at I_C = −2 A / I_B = −100 mA - low conduction loss enabling efficient power stage operation.
f_T	150 MHz - usable bandwidth for fast-switching control loops and pulse-width modulated drivers.
Cob	25 pF at V_CB = −10 V - output capacitance affecting turn-off speed and EMI in switching nodes.
h_FE	100–560 (rank S/T/U) at I_C = −100 mA - ensures predictable base drive requirements across production lots.
t_on/t_f	70 ns / 35 ns - short switching times reduce transition losses in high-frequency switching applications.

Pinout & Package

DPAK / TP-FA package (Case 369AH), surface-mount, 3-terminal configuration with exposed drain pad for thermal dissipation. Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source terminal for PNP operation	Connected to higher potential rail; determines current sourcing path and grounding reference for base drive.
2 (Base)	Control input for minority-carrier injection	Requires negative bias relative to emitter to forward-bias BE junction; drives switching via I_B = I_C/h_FE.
3 (Collector)	Current sink terminal	Connected to load return path; must withstand −50 V reverse bias when off and dissipate 1 W at ambient.

Key Features

Feature	Design Value
Low V_CE(sat)	−0.35 V typ. at −2 A reduces conduction loss by >40% vs. standard PNP transistors with >−0.6 V saturation.
Fast switching	70 ns t_on and 35 ns t_f enable PWM operation up to ~2 MHz without excessive transition loss.
Wide ASO	Extended Safe Operating Area allows simultaneous high voltage and high current pulses (e.g., I_CP = −6 A at V_CE ≤ −20 V).
Pb-Free & RoHS	Compliant with EU RoHS Directive 2011/65/EU; suitable for consumer and industrial end-equipment without lead exemption.
Small slim package	DPAK footprint (6.7 × 6.2 mm) saves PCB area vs. TO-220; exposed pad improves thermal resistance to 1.7 °C/W (junction-to-case).

Applications

Relay Drivers	Lamp Drivers
Use Scenario: Driving electromagnetic relays in industrial PLC I/O modules requiring high surge current tolerance and low dropout voltage. IC Role / Device Role / Timing Role: PNP high-side switch controlling coil current path; provides fast turn-on/turn-off to minimize contact arcing. Use Value: −0.35 V V_CE(sat) ensures >95% coil voltage delivery at −2 A, extending relay mechanical life and reducing heat buildup.	Use Scenario: Controlling incandescent or halogen lamps in automotive interior lighting and building management systems. IC Role / Device Role / Timing Role: Constant-current source during lamp inrush; handles peak currents up to −6 A (pulse) without secondary breakdown. Use Value: Wide ASO and 150 MHz f_T allow soft-start dimming control and transient suppression during cold-filament surges.
Voltage Regulators	Electrical Equipment Control
Use Scenario: Pass element in linear voltage regulators for 5–12 V outputs powering analog sensors and microcontrollers. IC Role / Device Role / Timing Role: Series PNP pass transistor regulating output by varying V_BE; operates in active region with precise h_FE tracking. Use Value: h_FE min = 35 at −3 A ensures stable base drive margin across temperature and load variation.	Use Scenario: Logic-level interface in HVAC control boards, motor starter circuits, and safety interlock systems. IC Role / Device Role / Timing Role: Level-shifting switch translating 3.3 V/5 V MCU outputs to −12 V/−24 V load control signals. Use Value: −6 V V_EBO rating and −50 V V_CEO support direct connection to industrial bus voltages without external clamping.

Relay Drivers

Lamp Drivers

Use Scenario: Driving electromagnetic relays in industrial PLC I/O modules requiring high surge current tolerance and low dropout voltage.

IC Role / Device Role / Timing Role: PNP high-side switch controlling coil current path; provides fast turn-on/turn-off to minimize contact arcing.

Use Value: −0.35 V V_CE(sat) ensures >95% coil voltage delivery at −2 A, extending relay mechanical life and reducing heat buildup.

Use Scenario: Controlling incandescent or halogen lamps in automotive interior lighting and building management systems.

IC Role / Device Role / Timing Role: Constant-current source during lamp inrush; handles peak currents up to −6 A (pulse) without secondary breakdown.

Use Value: Wide ASO and 150 MHz f_T allow soft-start dimming control and transient suppression during cold-filament surges.

Voltage Regulators

Electrical Equipment Control

Use Scenario: Pass element in linear voltage regulators for 5–12 V outputs powering analog sensors and microcontrollers.

IC Role / Device Role / Timing Role: Series PNP pass transistor regulating output by varying V_BE; operates in active region with precise h_FE tracking.

Use Value: h_FE min = 35 at −3 A ensures stable base drive margin across temperature and load variation.

Use Scenario: Logic-level interface in HVAC control boards, motor starter circuits, and safety interlock systems.

IC Role / Device Role / Timing Role: Level-shifting switch translating 3.3 V/5 V MCU outputs to −12 V/−24 V load control signals.

Use Value: −6 V V_EBO rating and −50 V V_CEO support direct connection to industrial bus voltages without external clamping.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD2955T4G	Higher V_CEO (−60 V), lower f_T (3 MHz), larger TO-252 package (7.7 × 6.7 mm)	Better suited for higher-voltage linear regulation but slower switching limits PWM use above 20 kHz.	Select when absolute V_CEO margin > −55 V is required and board space permits larger footprint.
PN3565	Lower I_C (−1 A), smaller SOT-89 package, no Pb-free option available	Only viable for low-power lamp/relay loads; lacks pulse current rating and ASO robustness of 2SB1202S-TL-E.	Choose only for cost-sensitive, low-current designs where thermal performance is not critical.

Compared with MJD2955T4G and PN3565, the 2SB1202S-TL-E uniquely balances −50 V rating, −3 A current, 150 MHz f_T, and DPAK thermal efficiency - making it optimal for space-constrained, medium-power switching applications requiring both speed and ruggedness.

Availability

2SB1202S-TL-E is available at Aetrix Electronics and suitable for relay drivers, lamp drivers, and voltage regulators requiring stable component supply, full RoHS compliance, and DPAK-compatible manufacturing flow.

Supply support for 2SB1202S-TL-E 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, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT markets.

The 2SB1202S-TL-E belongs to onsemi's general-purpose PNP bipolar transistor family designed for medium-power switching and linear regulation in industrial controls, power supplies, and electromechanical interfaces.

FAQ

What is the package type and mounting style of the 2SB1202S-TL-E?

The 2SB1202S-TL-E uses the DPAK / TP-FA package (Case 369AH), a surface-mount, 3-pin configuration with an exposed thermal pad. It is designed for reflow soldering on PCBs and requires proper thermal pad layout per onsemi's AN-1028 guidelines to achieve specified 15 W power dissipation at T_C = 25 °C.

Does the 2SB1202S-TL-E have a guaranteed h_FE range at high current?

Yes - the 2SB1202S-TL-E guarantees h_FE ≥ 35 at V_CE = −2 V and I_C = −3 A, as specified in the Electrical Characteristics table. This ensures predictable base drive requirements even under full-load switching conditions, unlike many PNP transistors that only specify h_FE at 100 mA.

Is the 2SB1202S-TL-E suitable for pulse operation beyond its DC current rating?

Yes - the 2SB1202S-TL-E supports I_CP = −6 A (collector current pulse) with defined safe operating area (ASO) curves in the datasheet. Pulse operation must respect the t_stg ≤ 650 ns and thermal limits; sustained pulses require derating based on duty cycle and heatsinking.

What is the maximum allowable V_CB for the 2SB1202S-TL-E?

The 2SB1202S-TL-E has a guaranteed V_CBO of −60 V at I_E = 0 A, meaning it can safely withstand −60 V between collector and base with emitter open. This rating exceeds its V_CEO (−50 V), providing margin for inductive flyback protection in relay and lamp driver circuits.

How does the 2SB1202S-TL-E compare to the 2SB1202S-E in terms of packaging and reliability?

The 2SB1202S-TL-E uses DPAK/TP-FA packaging (700 pcs./reel) versus the IPAK/TP (Case 369AJ) used by the 2SB1202S-E (500 pcs./bag). The TP-FA variant offers superior thermal resistance (1.7 °C/W vs. ~2.5 °C/W) and automated assembly compatibility, while both share identical electrical specs, Pb-free construction, and RoHS compliance.

2SB1202S-TL-E Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 3 A

Voltage - Collector Emitter Breakdown (Max):: 50 V

Vce Saturation (Max) @ Ib, Ic:: 700mV @ 100mA, 2A

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 140 @ 100mA, 2V

Power - Max:: 1 W

Frequency - Transition:: 150MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TP-FA

2SB1202S-TL-E FAQ

1.How can I place an order for 2SB1202S-TL-E through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SB1202S-TL-E 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 2SB1202S-TL-E reliable?

The price and inventory of 2SB1202S-TL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SB1202S-TL-E is usually 5 days.

3.What payment methods are accepted for 2SB1202S-TL-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SB1202S-TL-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SB1202S-TL-E?

2SB1202S-TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SB1202S-TL-E 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 2SB1202S-TL-E?

For technical support, including 2SB1202S-TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SB1202S-TL-E requirements.

6.How does Aetrix verify that 2SB1202S-TL-E is sourced from the original manufacturer or authorized distributors?

All 2SB1202S-TL-E 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 2SB1202S-TL-E meets industry standards.

7.What is the process for return or replacement of 2SB1202S-TL-E?

All 2SB1202S-TL-E units undergo pre-shipment inspection (PSI). If there is an issue with 2SB1202S-TL-E, 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 2SB1202S-TL-E part is unused and in its original packaging.

Return procedure for 2SB1202S-TL-E:

1.Submit a request within 90 days.

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

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