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

onsemi 2SD1802T-TL-E

Name: 2SD1802T-TL-E
Brand: onsemi
SKU: 2SD1802T-TL-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SD1802T-TL-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: 2SD1802T-TL-E.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SD1802T-TL-E from onsemi is a PNP bipolar junction transistor 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 (typ) at I_C = −2 A / I_B = −100 mA, f_T = 150 MHz, and housed in a DPAK/TP-FA (Case 369AH) surface-mount package. It is used in relay drivers, lamp drivers, and voltage regulators where high-current switching with low saturation loss is required.

For engineers reviewing the 2SD1802T-TL-E datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, confirmed −50 V V_CEO rating, measured −0.35 V V_CE(sat) under specified bias, documented 150 MHz f_T, and TP-FA package thermal performance per onsemi's Case 369AH mechanical outline.

Technical Context

This PNP transistor employs FBET and MBIT processes to achieve wide ASO and large current handling while maintaining fast switching (t_on = 70 ns, t_f = 35 ns) and low saturation voltage. Its DC current gain spans h_FE1 = 100–560 at I_C = −100 mA and h_FE2 = 35 min at I_C = −3 A, supporting both linear and saturated switching operation.

The device operates within a −55 °C to +150 °C storage range and 150 °C maximum junction temperature, with Cob = 25 pF (typ) at V_CB = −10 V and f = 1 MHz. Its TP-FA package enables high-power dissipation (15 W at T_C = 25 °C) in compact board space, suitable for thermally constrained industrial driver stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50 V - Maximum allowable collector-to-emitter voltage before breakdown in common-emitter configuration; defines safe operating voltage headroom in high-side switch applications.
I_C	−3 A - Continuous DC 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 saturation voltage minimizes conduction loss and self-heating in switching regulators and relay drivers.
f_T	150 MHz - Gain-bandwidth product confirms suitability for medium-frequency switching (e.g., <500 kHz PWM) with stable current gain.
P_C @ T_C = 25 °C	15 W - Thermal power dissipation capability at case temperature 25 °C; requires heatsinking or PCB copper area for sustained high-current operation.
h_FE2	35 (min) at I_C = −3 A / V_CE = −2 V - Minimum DC current gain under full-load conditions, enabling reliable base drive design for high-current saturation.

Pinout & Package

DPAK / TP-FA package (Case 369AH), surface-mount, 3-terminal plastic package with exposed drain pad for thermal enhancement. Dimensions per onsemi document 98AON66236E.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Emitter terminal (PNP)	Current exit node; connected to higher potential rail in high-side switch configurations; must be routed with low-inductance path for fast turn-off.
2 (Base)	Control input	Receives negative bias current to turn on; requires −100 mA drive for full saturation at −2 A load; base resistor sizing must ensure I_B ≥ I_C/20.
3 (Collector)	Load connection node	Connected to load and ground return; exposed pad (terminal 4) is electrically tied to collector and serves as primary thermal path to PCB.

Key Features

Feature	Design Value
Low V_CE(sat)	−0.35 V (typ) at −2 A ensures <0.7 W conduction loss per device, reducing thermal stress in parallel or high-duty-cycle lamp/relay drivers.
Fast switching	t_on = 70 ns, t_f = 35 ns enables efficient operation up to ~1 MHz PWM frequencies with minimal switching loss accumulation.
Wide ASO	Enhanced Safe Operating Area allows reliable operation under inductive load transients and short-circuit conditions without secondary breakdown.
FBET/MBIT process	Enables high h_FE consistency across current range and improved thermal stability versus standard BJT processes.

Applications

Lamp Driver	Relay Driver
Use Scenario: Driving 12 V automotive incandescent lamps (e.g., brake/tail lights) with PWM dimming up to 500 Hz. IC Role / Device Role / Timing Role: High-side PNP switch controlling lamp current path from battery to ground; handles peak currents up to −3 A during cold filament inrush. Use Value: Low V_CE(sat) limits power loss to <0.7 W at full brightness, eliminating need for external heatsink in most automotive PCB layouts.	Use Scenario: Controlling 24 V industrial relays with coil resistance 120 Ω, requiring −200 mA steady-state and −600 mA inrush current. IC Role / Device Role / Timing Role: Saturated PNP switch providing coil current path; fast t_f = 35 ns ensures clean relay release without contact arcing. Use Value: Confirmed h_FE2 ≥ 35 at −3 A guarantees sufficient gain margin for reliable saturation using standard microcontroller GPIO drive.
Voltage Regulator Pass Element	Industrial Equipment Power Control
Use Scenario: Linear pass transistor in adjustable 5–15 V, 2 A output regulator with thermal foldback protection. IC Role / Device Role / Timing Role: Series pass element dissipating up to 12 W under worst-case dropout; operated in linear region with V_CE = 4–6 V. Use Value: Wide ASO and 150 °C T_J(max) support continuous operation with moderate heatsinking, avoiding thermal runaway during overload.	Use Scenario: Motor enable/disable control in HVAC blower modules, switching 24 V DC brushed motors drawing up to −2.5 A. IC Role / Device Role / Timing Role: High-side logic-level controlled switch interfacing with MCU GPIO via level-shifting circuitry. Use Value: TP-FA package's exposed collector pad provides direct thermal coupling to 2 oz copper PCB, sustaining 2.5 A continuous with <40 °C rise above ambient.

Lamp Driver

Relay Driver

Use Scenario: Driving 12 V automotive incandescent lamps (e.g., brake/tail lights) with PWM dimming up to 500 Hz.

IC Role / Device Role / Timing Role: High-side PNP switch controlling lamp current path from battery to ground; handles peak currents up to −3 A during cold filament inrush.

Use Value: Low V_CE(sat) limits power loss to <0.7 W at full brightness, eliminating need for external heatsink in most automotive PCB layouts.

Use Scenario: Controlling 24 V industrial relays with coil resistance 120 Ω, requiring −200 mA steady-state and −600 mA inrush current.

IC Role / Device Role / Timing Role: Saturated PNP switch providing coil current path; fast t_f = 35 ns ensures clean relay release without contact arcing.

Use Value: Confirmed h_FE2 ≥ 35 at −3 A guarantees sufficient gain margin for reliable saturation using standard microcontroller GPIO drive.

Voltage Regulator Pass Element

Industrial Equipment Power Control

Use Scenario: Linear pass transistor in adjustable 5–15 V, 2 A output regulator with thermal foldback protection.

IC Role / Device Role / Timing Role: Series pass element dissipating up to 12 W under worst-case dropout; operated in linear region with V_CE = 4–6 V.

Use Value: Wide ASO and 150 °C T_J(max) support continuous operation with moderate heatsinking, avoiding thermal runaway during overload.

Use Scenario: Motor enable/disable control in HVAC blower modules, switching 24 V DC brushed motors drawing up to −2.5 A.

IC Role / Device Role / Timing Role: High-side logic-level controlled switch interfacing with MCU GPIO via level-shifting circuitry.

Use Value: TP-FA package's exposed collector pad provides direct thermal coupling to 2 oz copper PCB, sustaining 2.5 A continuous with <40 °C rise above ambient.

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
MJD122T4G	Higher V_CEO = −100 V, lower f_T = 3 MHz, same TP-FA package and −3 A I_C rating.	Better suited for higher-voltage industrial controls (>60 V bus); slower switching limits use in >10 kHz PWM.	Select when system voltage exceeds −50 V but switching speed <10 kHz is acceptable.
2SB1202T-TL-E	PNP companion in same family; identical TP-FA package, −50 V V_CEO, but lower I_C = −2 A and higher V_CE(sat) = −0.5 V (typ).	Used in lower-current complementary designs; not interchangeable at −3 A load due to current and saturation voltage mismatch.	Choose only if design operates ≤ −2 A and can tolerate +0.15 V higher V_CE(sat).

Compared with MJD122T4G and 2SB1202T-TL-E, the 2SD1802T-TL-E uniquely balances −50 V rating, −3 A current, 150 MHz f_T, and −0.35 V V_CE(sat) in TP-FA - making it optimal for 12–24 V systems demanding both efficiency and medium-frequency response.

Availability

2SD1802T-TL-E is available at Aetrix Electronics and suitable for lamp drivers, relay drivers, and voltage regulators requiring stable component supply in industrial and automotive electronics programs.

Supply support for 2SD1802T-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 focused on energy-efficient technologies for automotive, industrial, cloud, and IoT applications.

The 2SD1802T-TL-E belongs to onsemi's general-purpose PNP BJT product line, designed specifically for high-current, low-saturation switching in power interface circuits where thermal performance and reliability under transient loads are critical.

FAQ

What is the maximum continuous collector current rating for the 2SD1802T-TL-E?

The 2SD1802T-TL-E has a maximum continuous collector current (I_C) rating of −3 A at T_C = 25 °C. This rating assumes proper heatsinking; derating is required above 25 °C case temperature per the PC–TA curve in the onsemi datasheet. The device also supports −6 A pulsed current (I_CP) for short durations.

Is the 2SD1802T-TL-E RoHS compliant and lead-free?

Yes, the 2SD1802T-TL-E is Pb-Free and RoHS compliant, as explicitly stated in the onsemi datasheet features section and confirmed in the ordering information table. The "-E" suffix in the part number denotes RoHS-compliant packaging and processing.

What package type does the 2SD1802T-TL-E use, and what are its thermal characteristics?

The 2SD1802T-TL-E uses the DPAK / TP-FA package (Case 369AH), which features an exposed collector pad for enhanced thermal conduction. It delivers 15 W power dissipation at T_C = 25 °C and requires appropriate PCB copper area or heatsink attachment to the collector pad to maintain safe junction temperature under sustained load.

Does the 2SD1802T-TL-E have a guaranteed minimum DC current gain at full rated current?

Yes, the 2SD1802T-TL-E guarantees h_FE2 ≥ 35 at I_C = −3 A and V_CE = −2 V, ensuring predictable base drive requirements for saturation. This value is distinct from the higher h_FE1 = 100–560 specified at I_C = −100 mA and reflects real-world gain under full-load switching conditions.

What is the typical collector-to-emitter saturation voltage for the 2SD1802T-TL-E under standard test conditions?

The typical collector-to-emitter saturation voltage (V_CE(sat)) for the 2SD1802T-TL-E is −0.35 V at I_C = −2 A and I_B = −100 mA. The datasheet specifies a maximum of −0.7 V under those same conditions, confirming tight distribution and low conduction loss for high-efficiency switching applications.

2SD1802T-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:: Active

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:: 200 @ 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

2SD1802T-TL-E FAQ

1.How can I place an order for 2SD1802T-TL-E through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SD1802T-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 2SD1802T-TL-E reliable?

The price and inventory of 2SD1802T-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 2SD1802T-TL-E is usually 5 days.

3.What payment methods are accepted for 2SD1802T-TL-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SD1802T-TL-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SD1802T-TL-E?

2SD1802T-TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SD1802T-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 2SD1802T-TL-E?

For technical support, including 2SD1802T-TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SD1802T-TL-E requirements.

6.How does Aetrix verify that 2SD1802T-TL-E is sourced from the original manufacturer or authorized distributors?

All 2SD1802T-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 2SD1802T-TL-E meets industry standards.

7.What is the process for return or replacement of 2SD1802T-TL-E?

All 2SD1802T-TL-E units undergo pre-shipment inspection (PSI). If there is an issue with 2SD1802T-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 2SD1802T-TL-E part is unused and in its original packaging.

Return procedure for 2SD1802T-TL-E:

1.Submit a request within 90 days.

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

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