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

onsemi 2SD1802S-TL-E

Name: 2SD1802S-TL-E
Brand: onsemi
SKU: 2SD1802S-TL-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SD1802S-TL-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: 2SD1802S-TL-E.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SD1802S-TL-E from onsemi is a PNP bipolar junction transistor (BJT) rated for −50 V V_CEO, −3 A I_C, and 15 W P_C at T_C = 25 °C, featuring low V_CE(sat) of −0.35 V at I_C = −2 A / I_B = −100 mA and f_T = 150 MHz - used in relay drivers, lamp drivers, and voltage regulators where compact high-current switching is required.

For engineers reviewing the 2SD1802S-TL-E datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, TP-FA (DPAK) package compatibility, guaranteed h_FE ≥ 35 at I_C = −3 A, confirmed ASO robustness, and RoHS-compliant Pb-free construction.

Technical Context

This PNP transistor employs FBET and MBIT processes to achieve wide Active Safe Operating Area (ASO) and fast switching with t_on = 70 ns, t_stg = 650 ns, and t_f = 35 ns under specified test conditions. Its low saturation voltage enables efficient power control in linear and switching modes.

The device operates with V_(BR)CEO = −50 V, V_(BR)CBO = −60 V, and V_(BR)EBO = −6 V, supporting stable biasing across industrial ambient ranges up to T_J = 150 °C and T_STG = −55 to +150 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50 V - maximum collector-emitter voltage before breakdown under open-base condition
I_C	−3 A - continuous DC collector current rating at T_C = 25 °C
V_CE(sat)	−0.35 V (typ) at I_C = −2 A / I_B = −100 mA - enables low conduction loss in saturated switch applications
h_FE	35 (min) at V_CE = −2 V, I_C = −3 A - ensures reliable base drive margin for high-current switching
f_T	150 MHz - supports high-speed switching in pulse-width modulation and relay control circuits
P_C @ T_C	15 W - thermal dissipation capability when mounted on heatsink at case temperature 25 °C
C_ob	25 pF at V_CB = −10 V, f = 1 MHz - limits high-frequency capacitive loading in driver stages

Pinout & Package

DPAK / TP-FA package (Case 369AH), surface-mount, 3-terminal configuration with exposed drain pad for thermal enhancement.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	E	PNP emitter terminal - connects to higher potential rail in common-emitter switching configurations
2 (Base)	B	Control input - requires negative base current relative to emitter to turn on device
3 (Collector)	C	Main current path - connects to load and lower-potential supply in high-side switch topologies

Key Features

Feature	Design Value
Low V_CE(sat)	−0.35 V typ at I_C = −2 A - reduces power loss and heat generation during saturation
Wide ASO	Guaranteed safe operating area under single-pulse and repetitive switching conditions - improves reliability in inductive load switching
Fast switching	t_on/t_f = 70/35 ns - supports PWM frequencies >1 MHz in lamp and relay drivers
Pb-Free & RoHS	Compliant construction - meets environmental compliance requirements for industrial and consumer equipment
TP-FA (DPAK)	Standardized surface-mount footprint with thermal pad - enables automated assembly and efficient PCB heat transfer

Applications

Relay Driver Circuit	Lamp Driver Module
Use Scenario: Driving electromagnetic relays in industrial PLC output modules requiring high surge current handling and fast turn-off. IC Role / Device Role / Timing Role: High-side PNP switch controlling relay coil current with active pull-down via base resistor network. Use Value: Low V_CE(sat) minimizes coil voltage drop; wide ASO prevents secondary breakdown during relay de-energization.	Use Scenario: Controlling incandescent or halogen lamps in automotive interior lighting and building management systems. IC Role / Device Role / Timing Role: Constant-current or PWM-controlled PNP switch regulating lamp brightness and enabling soft-start functionality. Use Value: 15 W thermal rating supports sustained operation at full brightness; fast t_f enables precise dimming resolution.
Voltage Regulator Pass Element	Electrical Equipment Power Stage
Use Scenario: Linear voltage regulator pass transistor in low-noise analog power supplies for sensor signal conditioning. IC Role / Device Role / Timing Role: Series pass element operating in active region with feedback-controlled base bias. Use Value: Stable h_FE ≥ 35 at I_C = −3 A ensures predictable loop gain; low V_CE(sat) extends dropout margin.	Use Scenario: Power switching stage in HVAC control panels, motor starter logic, and industrial panel meters. IC Role / Device Role / Timing Role: General-purpose PNP switch interfacing microcontroller GPIOs to 24 V DC loads. Use Value: −50 V V_CEO provides headroom against back-EMF transients; TP-FA package allows dense layout with thermal relief.

Relay Driver Circuit

Lamp Driver Module

Use Scenario: Driving electromagnetic relays in industrial PLC output modules requiring high surge current handling and fast turn-off.

IC Role / Device Role / Timing Role: High-side PNP switch controlling relay coil current with active pull-down via base resistor network.

Use Value: Low V_CE(sat) minimizes coil voltage drop; wide ASO prevents secondary breakdown during relay de-energization.

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

IC Role / Device Role / Timing Role: Constant-current or PWM-controlled PNP switch regulating lamp brightness and enabling soft-start functionality.

Use Value: 15 W thermal rating supports sustained operation at full brightness; fast t_f enables precise dimming resolution.

Voltage Regulator Pass Element

Electrical Equipment Power Stage

Use Scenario: Linear voltage regulator pass transistor in low-noise analog power supplies for sensor signal conditioning.

IC Role / Device Role / Timing Role: Series pass element operating in active region with feedback-controlled base bias.

Use Value: Stable h_FE ≥ 35 at I_C = −3 A ensures predictable loop gain; low V_CE(sat) extends dropout margin.

Use Scenario: Power switching stage in HVAC control panels, motor starter logic, and industrial panel meters.

IC Role / Device Role / Timing Role: General-purpose PNP switch interfacing microcontroller GPIOs to 24 V DC loads.

Use Value: −50 V V_CEO provides headroom against back-EMF transients; TP-FA package allows dense layout with thermal relief.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SB1202S-TL-E	Same TP-FA package, identical pinout, but PNP counterpart with V_CEO = −50 V, I_C = −3 A, and h_FE ≥ 35 at I_C = −3 A - shares same die family and process	Functionally interchangeable in complementary designs; differs only in polarity and marking	Select when complementary PNP/NPN pairing is required in dual-rail driver circuits
MJD44H11T4G	TO-252 (DPAK) PNP BJT with V_CEO = −80 V, I_C = −8 A, V_CE(sat) = −1.5 V (max) at I_C = −6 A - higher voltage/current but higher saturation loss	Supports higher bus voltages and loads; less suitable for low-loss 24 V lamp/relay applications due to higher V_CE(sat)	Choose when extended voltage headroom or higher current capacity is needed, accepting trade-off in conduction efficiency

Compared with 2SD1802S-TL-E, 2SB1202S-TL-E offers identical form-factor and electrical envelope for complementary use, while MJD44H11T4G trades lower V_CE(sat) for higher V_CEO and I_C - making it viable for upgraded voltage-class designs but less optimal for low-loss 24 V switching.

Availability

2SD1802S-TL-E is available at Aetrix Electronics and suitable for relay drivers, lamp drivers, and voltage regulators requiring stable component supply despite its discontinued status - supported via legacy inventory and cross-qualified alternatives.

Supply support for 2SD1802S-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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The 2SD1802S-TL-E belongs to onsemi's general-purpose bipolar transistor product line, designed specifically for high-reliability, high-current switching in industrial control and power interface applications.

FAQ

What is the package type of the 2SD1802S-TL-E?

The 2SD1802S-TL-E uses the DPAK / TP-FA package (Case 369AH), a surface-mount 3-pin outline with an exposed thermal pad. This package supports automated assembly and provides effective thermal conduction to the PCB, essential for sustaining its 15 W power dissipation rating at T_C = 25 °C. The 2SD1802S-TL-E pinout matches standard DPAK mechanical dimensions per onsemi documentation.

Is the 2SD1802S-TL-E still in production?

No - the 2SD1802S-TL-E is officially marked as Discontinued by onsemi per the April 2026 revision of its datasheet (Publication Order Number 2SB1202/D). However, Aetrix Electronics maintains legacy inventory and supports design continuity through traceable sourcing and validated alternatives such as 2SB1202S-TL-E and MJD44H11T4G for the 2SD1802S-TL-E.

What is the minimum h_FE of the 2SD1802S-TL-E at high current?

The 2SD1802S-TL-E guarantees h_FE ≥ 35 at V_CE = −2 V and I_C = −3 A, as specified in the Electrical Characteristics table. This minimum DC current gain ensures sufficient base drive margin for reliable saturation in high-current switching applications like relay and lamp drivers, where consistent gain at full load is critical for predictable turn-on behavior.

Does the 2SD1802S-TL-E meet RoHS requirements?

Yes - the 2SD1802S-TL-E is explicitly stated as Pb-Free and RoHS compliant in its official onsemi datasheet. This compliance applies to all shipped units bearing the "-TL-E" suffix, confirming adherence to EU Directive 2011/65/EU and related environmental standards for hazardous substances in electrical and electronic equipment.

What is the maximum collector-emitter voltage rating for the 2SD1802S-TL-E?

The 2SD1802S-TL-E has a maximum collector-emitter voltage rating of V_(BR)CEO = −50 V at I_C = −1 mA with R_BE present, as defined in the Absolute Maximum Ratings table. This rating establishes the upper limit for safe operation in common-emitter configurations and must not be exceeded to prevent avalanche breakdown or permanent device damage.

2SD1802S-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:: NPN

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

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

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

2SD1802S-TL-E FAQ

1.How can I place an order for 2SD1802S-TL-E through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SD1802S-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 2SD1802S-TL-E reliable?

The price and inventory of 2SD1802S-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 2SD1802S-TL-E is usually 5 days.

3.What payment methods are accepted for 2SD1802S-TL-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SD1802S-TL-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SD1802S-TL-E?

2SD1802S-TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SD1802S-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 2SD1802S-TL-E?

For technical support, including 2SD1802S-TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SD1802S-TL-E requirements.

6.How does Aetrix verify that 2SD1802S-TL-E is sourced from the original manufacturer or authorized distributors?

All 2SD1802S-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 2SD1802S-TL-E meets industry standards.

7.What is the process for return or replacement of 2SD1802S-TL-E?

All 2SD1802S-TL-E units undergo pre-shipment inspection (PSI). If there is an issue with 2SD1802S-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 2SD1802S-TL-E part is unused and in its original packaging.

Return procedure for 2SD1802S-TL-E:

1.Submit a request within 90 days.

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

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