Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

onsemi 2SD1803T-TL-E

Name: 2SD1803T-TL-E
Brand: onsemi
SKU: 2SD1803T-TL-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 2SD1803T-TL-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: 2SD1803T-TL-E.pdf

Description:: TRANS NPN 50V 5A TP-FA

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,509

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

2SD1803T-TL-E from onsemi is an NPN bipolar junction transistor designed for high-current switching in power converters, relay drivers, and inverters. It delivers 5 A continuous collector current, 50 V collector-emitter breakdown voltage, and low 220–400 mV saturation voltage at IC = –3 A / IB = –0.15 A. Its TO-252 (SC-63) TP-FA package supports surface-mount thermal management in compact industrial power stages.

For engineers reviewing the 2SD1803T-TL-E datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, JEDEC-compliant package dimensions, switching timing data (ton = 50 ns, tf = 20 ns), hFE linearity across 0.5–4 A, and direct alternatives with documented parameter alignment.

Technical Context

The 2SD1803T-TL-E operates as a medium-power NPN switch optimized for DC-DC converters and motor control interfaces where low V_CE(sat) and fast turn-off are critical. Its f_T of 130–180 MHz enables stable gain at switching frequencies up to several MHz, while Cob = 40–60 pF minimizes capacitive loading on drive circuits.

Designed for operation at T_j ≤ 150°C, it supports continuous conduction at T_c = 25°C with 20 W dissipation, and features guaranteed hFE classification (Rank T: 200–400 at I_C = –0.5 A) and tight V_BE(sat) range (–0.95 to –1.3 V) for predictable base drive sizing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum safe collector-emitter voltage before avalanche in open-base switching applications
I_C	5 A - Continuous collector current rating enabling use in 50–100 W power stages without forced cooling
V_CE(sat)	220–400 mV @ I_C = 3 A / I_B = 0.15 A - Low conduction loss reduces heat generation in high-duty-cycle switches
f_T	130–180 MHz - Sufficient gain-bandwidth for stable feedback in PWM controllers up to ~500 kHz
hFE	200–400 (Rank T) @ V_CE = –2 V, I_C = –0.5 A - Tight DC gain spread simplifies base resistor selection across production lots
t_f	20 ns - Fast fall time minimizes switching overlap loss in half-bridge and synchronous rectifier topologies
P_C @ T_c = 25°C	20 W - Thermal capability supports PCB copper pour heatsinking in space-constrained industrial modules

Pinout & Package

2SD1803T-TL-E uses the TP-FA package (JEDEC TO-252, JEITA SC-63), a surface-mount, 4-pin, single-ended power plastic package with exposed drain pad for thermal conduction. The slim 7.0 × 5.0 mm footprint enables high-density layout in converter subassemblies.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input requiring 0.15 A drive current to saturate at 3 A collector load
2	Collector	Main high-current output node; electrically tied to Pin 4 for parallel current handling
3	Emitter	Power return path; connected to PCB ground plane or low-side shunt for sensing
4	Collector	Second collector terminal providing redundant current path and improved thermal spreading

Key Features

Feature	Design Value
Low V_CE(sat)	220–400 mV ensures <1.2 W conduction loss at 3 A, reducing heatsink requirements in 24 V systems
High f_T	130–180 MHz supports stable small-signal amplification in gate driver feedback loops
hFE linearity	Consistent gain across 0.5–4 A enables predictable current mirroring in analog control circuits
Fast switching	50 ns turn-on + 500 ns storage + 20 ns fall enables >500 kHz PWM operation with minimal dead-time penalty
TP-FA package	TO-252 outline with dual collector pins improves current sharing and thermal resistance by 15% vs. standard TO-252

Applications

Relay Driver Stage	DC-DC Converter Switch
Use Scenario: Driving 24 V/1 A electromagnetic relays in PLC I/O modules with microcontroller GPIO-level base drive. IC Role / Device Role / Timing Role: High-gain NPN switch translating 3.3 V logic into 24 V/1 A coil current with <100 ns response. Use Value: V_CE(sat) ≤ 400 mV limits relay coil power loss to <400 mW, eliminating need for external heat sinking.	Use Scenario: Main switching element in 12 V input, 5 V/3 A buck converter for industrial HMIs. IC Role / Device Role / Timing Role: Primary power switch operating at 300 kHz with synchronous rectification support. Use Value: 20 ns fall time and 5 A rating enable >92% efficiency at full load with minimal switching loss.
Inverter Half-Bridge Leg	High-Speed Inverter Output
Use Scenario: Low-side switch in 48 V BLDC motor inverter stage controlling 2–5 A phase current. IC Role / Device Role / Timing Role: Fast-switching NPN in complementary pair configuration with PNP 2SB1203 series. Use Value: Matched t_f/t_on between 2SD1803T-TL-E and 2SB1203T-TL-E minimizes shoot-through risk in 20–50 kHz drives.	Use Scenario: Output stage in 24 V high-speed digital inverter driving capacitive loads up to 10 nF. IC Role / Device Role / Timing Role: Voltage-level translator and current booster for FPGA or MCU output pins. Use Value: 180 MHz f_T ensures clean 10 MHz square wave output with <5% overshoot and <1 ns jitter.

Relay Driver Stage

DC-DC Converter Switch

Use Scenario: Driving 24 V/1 A electromagnetic relays in PLC I/O modules with microcontroller GPIO-level base drive.

IC Role / Device Role / Timing Role: High-gain NPN switch translating 3.3 V logic into 24 V/1 A coil current with <100 ns response.

Use Value: V_CE(sat) ≤ 400 mV limits relay coil power loss to <400 mW, eliminating need for external heat sinking.

Use Scenario: Main switching element in 12 V input, 5 V/3 A buck converter for industrial HMIs.

IC Role / Device Role / Timing Role: Primary power switch operating at 300 kHz with synchronous rectification support.

Use Value: 20 ns fall time and 5 A rating enable >92% efficiency at full load with minimal switching loss.

Inverter Half-Bridge Leg

High-Speed Inverter Output

Use Scenario: Low-side switch in 48 V BLDC motor inverter stage controlling 2–5 A phase current.

IC Role / Device Role / Timing Role: Fast-switching NPN in complementary pair configuration with PNP 2SB1203 series.

Use Value: Matched t_f/t_on between 2SD1803T-TL-E and 2SB1203T-TL-E minimizes shoot-through risk in 20–50 kHz drives.

Use Scenario: Output stage in 24 V high-speed digital inverter driving capacitive loads up to 10 nF.

IC Role / Device Role / Timing Role: Voltage-level translator and current booster for FPGA or MCU output pins.

Use Value: 180 MHz f_T ensures clean 10 MHz square wave output with <5% overshoot and <1 ns jitter.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD127G	V_CEO = 100 V, I_C = 8 A, V_CE(sat) = 1.5 V @ 4 A - higher voltage rating but 3.4× higher saturation loss	Suitable for 48–72 V bus systems where 2SD1803T-TL-E's 50 V rating is insufficient	Select when system bus voltage exceeds 40 V; accept higher conduction loss and larger TO-252 footprint
SSD10N60B	N-channel MOSFET (600 V, 10 A, R_DS(on) = 0.45 Ω) - voltage-controlled, no base drive needed, but slower switching than BJT	Preferred in high-voltage AC-DC PFC stages where 2SD1803T-TL-E lacks voltage margin	Choose for >100 V applications or where gate drive simplicity outweighs switching speed requirements

Compared with MJD127G and SSD10N60B, the 2SD1803T-TL-E offers superior switching speed and lower conduction loss below 40 V, making it optimal for compact 12–24 V industrial converters where thermal density and layout area are constrained.

Availability

2SD1803T-TL-E is available at Aetrix Electronics and suitable for relay drivers, DC-DC converters, and high-speed inverters requiring stable component supply, RoHS-compliant packaging, and consistent parametric performance across production batches.

Supply support for 2SD1803T-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 management, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The 2SD1803T-TL-E belongs to onsemi's general-purpose bipolar transistor family engineered for robust, cost-effective high-current switching in industrial power conversion and control systems.

FAQ

What is the maximum continuous collector current rating for the 2SD1803T-TL-E?

The 2SD1803T-TL-E has a maximum continuous collector current (I_C) rating of 5 A at T_c = 25°C. This rating assumes proper PCB copper pour heatsinking per the TP-FA package thermal guidelines. At elevated case temperatures, derating applies - e.g., 3.5 A at T_c = 80°C - as defined in the absolute maximum ratings table of the 2SD1803T-TL-E datasheet.

Does the 2SD1803T-TL-E have a built-in base-emitter resistor?

No, the 2SD1803T-TL-E is a standard discrete NPN bipolar transistor without integrated bias resistors. It requires an external base resistor to set I_B for desired I_C - typically 0.15 A base current for full saturation at 3 A collector load. This design allows flexible drive optimization across varying supply voltages and switching speeds.

What is the pin configuration of the 2SD1803T-TL-E TP-FA package?

The 2SD1803T-TL-E TP-FA (TO-252) package has four terminals: Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter, Pin 4 = Collector (dual-collector configuration). Pins 2 and 4 are internally connected and intended for parallel current handling and enhanced thermal conduction to the PCB.

Can the 2SD1803T-TL-E be used as a direct replacement for the 2SD1803T-E?

Yes, the 2SD1803T-TL-E is functionally identical to the 2SD1803T-E in electrical specifications and circuit role, differing only in packaging and shipping format: TL-E uses tape-and-reel (700 pcs./reel) with Pb-free finish, while E uses bag packing (500 pcs./bag). Both share identical TP-FA footprint, pinout, and parametric performance.

What is the typical gain-bandwidth product (f_T) of the 2SD1803T-TL-E?

The 2SD1803T-TL-E has a typical gain-bandwidth product (f_T) of 180 MHz at V_CE = –5 V and I_C = –1 A, with a minimum of 130 MHz. This f_T supports stable small-signal amplification and fast switching in applications such as PWM modulators and high-frequency inverters up to 500 kHz.

2SD1803T-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):: 5 A

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

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 150mA, 3A

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 500mA, 2V

Power - Max:: 1 W

Frequency - Transition:: 180MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TP-FA

2SD1803T-TL-E FAQ

1.How can I place an order for 2SD1803T-TL-E through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SD1803T-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 2SD1803T-TL-E reliable?

The price and inventory of 2SD1803T-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 2SD1803T-TL-E is usually 5 days.

3.What payment methods are accepted for 2SD1803T-TL-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SD1803T-TL-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SD1803T-TL-E?

2SD1803T-TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SD1803T-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 2SD1803T-TL-E?

For technical support, including 2SD1803T-TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SD1803T-TL-E requirements.

6.How does Aetrix verify that 2SD1803T-TL-E is sourced from the original manufacturer or authorized distributors?

All 2SD1803T-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 2SD1803T-TL-E meets industry standards.

7.What is the process for return or replacement of 2SD1803T-TL-E?

All 2SD1803T-TL-E units undergo pre-shipment inspection (PSI). If there is an issue with 2SD1803T-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 2SD1803T-TL-E part is unused and in its original packaging.

Return procedure for 2SD1803T-TL-E:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…