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

onsemi 2SD1803S-TL-H

Name: 2SD1803S-TL-H
Brand: onsemi
SKU: 2SD1803S-TL-H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SD1803S-TL-H

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: 2SD1803S-TL-H.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SD1803S-TL-H from onsemi is an NPN bipolar power transistor in TP-FA (TO-252) package, rated for 50 V V_CEO, 5 A I_C, and 20 W P_C at T_C = 25°C, with low 220–400 mV V_CE(sat) at I_C = 3 A / I_B = 0.15 A, used in high-current switching applications including relay drivers and DC-DC converters.

For engineers reviewing the 2SD1803S-TL-H datasheet, pinout, applications, or equivalent options, key selection criteria include verified V_CE(sat) performance under pulsed 3 A load, f_T ≥ 130 MHz gain-bandwidth, h_FE range of 70–400 at I_C = 0.5 A and 35 min at I_C = 4 A, and TO-252-compatible thermal dissipation capability.

Technical Context

This device operates as a single NPN silicon bipolar junction transistor optimized for linear amplification and fast-switching duty in medium-power circuits. Its design emphasizes low saturation voltage and high current gain linearity across I_C = 0.5–4 A, supported by f_T = 130–180 MHz and Cob = 40–60 pF at V_CB = –10 V.

The 2SD1803S-TL-H shares electrical characteristics and package footprint with the 2SB1203S-TL-H PNP complement, enabling complementary pair use in push-pull topologies. It is specified for operation from T_stg = –55 to +150°C and rated for 150°C maximum junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum safe collector-emitter voltage before breakdown under open-base condition.
I_C	5 A - Continuous DC collector current rating at T_C = 25°C; supports sustained 3 A switching loads.
V_CE(sat)	220–400 mV - Confirmed saturation voltage at I_C = 3 A / I_B = 0.15 A; enables low conduction loss in switch-mode designs.
f_T	130–180 MHz - Gain-bandwidth product at V_CE = –5 V, I_C = –1 A; supports high-speed switching up to ~50 MHz practical edge rates.
h_FE	70–400 - DC current gain range at V_CE = –2 V, I_C = –0.5 A; ensures stable biasing across production lots and temperature.
P_C	20 W - Maximum collector dissipation at case temperature 25°C; requires heatsinking for >2 W continuous operation.
t_on/t_f	50 ns / 20 ns - Verified turn-on and fall times under standard test circuit; enables <100 ns total switching cycle in optimized layouts.

Pinout & Package

2SD1803S-TL-H uses the TP-FA package, identical to JEDEC TO-252 (SC-63), with exposed collector tab for thermal and electrical connection. The package features gull-wing leads, surface-mount compatibility, and 7.0 mm × 5.0 mm footprint.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal; accepts base drive current to enable collector-emitter conduction; requires series resistor for current limiting.
2 & 4	Collector	Common collector terminals tied internally; connected to exposed metal tab for low-inductance, high-current path and thermal transfer.
3	Emitter	Current return path; referenced to system ground or low-side switch node; carries full load current during conduction.

Key Features

Feature	Design Value
Low V_CE(sat)	220–400 mV at I_C = 3 A enables <1.2 W conduction loss per device in 5 A peak-load switching applications.
High f_T	130–180 MHz bandwidth supports clean square-wave switching up to 20–30 MHz without excessive rise/fall degradation.
h_FE linearity	Verified h_FE consistency across I_C = 0.5–4 A simplifies fixed-gain bias network design and improves current-source accuracy.
Fast switching	50 ns t_on and 20 ns t_f reduce transition losses and EMI generation in PWM-based power stages.
TP-FA package	TO-252 outline with dual collector pins and thermal tab provides mechanical robustness, 20 W thermal capacity, and PCB-level heat spreading.

Applications

Relay Driver Circuit	DC-DC Converter Switch
Use Scenario: Driving 12 V/500 mA electromagnetic relays in industrial PLC output modules with microcontroller GPIO control. IC Role / Device Role / Timing Role: NPN power switch amplifying logic-level base signal to deliver full coil current with minimal voltage drop. Use Value: 220–400 mV V_CE(sat) ensures >95% coil voltage delivery and eliminates need for external flyback diode snubbing in many cases.	Use Scenario: High-side or low-side switching element in 24 V input, 5 V/3 A buck converter operating at 250 kHz. IC Role / Device Role / Timing Role: Main power switch controlling energy transfer through inductor; driven by PWM controller with 0.15 A base current. Use Value: 50 ns t_on and 20 ns t_f limit switching loss to <15% of total loss at 250 kHz, improving efficiency over slower transistors.
Inverter Half-Bridge Stage	Motor Control H-Bridge Leg
Use Scenario: Upper switch in 48 V, 10 A half-bridge inverter for HVAC blower motor control. IC Role / Device Role / Timing Role: High-current NPN switch paired with complementary 2SB1203S-TL-H PNP in totem-pole configuration. Use Value: Matched h_FE linearity and V_CE(sat) between 2SD1803S-TL-H and 2SB1203S-TL-H minimizes shoot-through risk and improves dead-time margin.	Use Scenario: Low-side switch in brushed DC motor driver delivering 5 A stall current with PWM speed control. IC Role / Device Role / Timing Role: Ground-referenced current sink switching motor winding to GND at up to 20 kHz. Use Value: 20 W P_C rating and TO-252 thermal pad allow direct copper pour mounting, sustaining 5 A continuous without forced air cooling.

Relay Driver Circuit

DC-DC Converter Switch

Use Scenario: Driving 12 V/500 mA electromagnetic relays in industrial PLC output modules with microcontroller GPIO control.

IC Role / Device Role / Timing Role: NPN power switch amplifying logic-level base signal to deliver full coil current with minimal voltage drop.

Use Value: 220–400 mV V_CE(sat) ensures >95% coil voltage delivery and eliminates need for external flyback diode snubbing in many cases.

Use Scenario: High-side or low-side switching element in 24 V input, 5 V/3 A buck converter operating at 250 kHz.

IC Role / Device Role / Timing Role: Main power switch controlling energy transfer through inductor; driven by PWM controller with 0.15 A base current.

Use Value: 50 ns t_on and 20 ns t_f limit switching loss to <15% of total loss at 250 kHz, improving efficiency over slower transistors.

Inverter Half-Bridge Stage

Motor Control H-Bridge Leg

Use Scenario: Upper switch in 48 V, 10 A half-bridge inverter for HVAC blower motor control.

IC Role / Device Role / Timing Role: High-current NPN switch paired with complementary 2SB1203S-TL-H PNP in totem-pole configuration.

Use Value: Matched h_FE linearity and V_CE(sat) between 2SD1803S-TL-H and 2SB1203S-TL-H minimizes shoot-through risk and improves dead-time margin.

Use Scenario: Low-side switch in brushed DC motor driver delivering 5 A stall current with PWM speed control.

IC Role / Device Role / Timing Role: Ground-referenced current sink switching motor winding to GND at up to 20 kHz.

Use Value: 20 W P_C rating and TO-252 thermal pad allow direct copper pour mounting, sustaining 5 A continuous without forced air cooling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN bipolar switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD127G	Higher V_CEO = 80 V, lower f_T = 3 MHz, TO-252 package, Pb-free only.	Preferred where higher voltage margin is required but switching speed is secondary.	Select MJD127G when operating above 50 V bus or where reduced RF emission from slower edges is beneficial.
2SD1802S-TL-H	Same package and pinout; lower I_C = 3 A, lower P_C = 15 W, V_CE(sat) up to 500 mV at I_C = 2 A.	Suitable for <3 A loads where thermal budget is constrained.	Choose 2SD1802S-TL-H for cost-sensitive, lower-current applications where 2SD1803S-TL-H's 5 A headroom is unnecessary.

Compared with MJD127G and 2SD1802S-TL-H, the 2SD1803S-TL-H delivers superior combination of 5 A current handling, 220–400 mV low-saturation voltage, and 130–180 MHz f_T, making it optimal for thermally demanding, high-efficiency 24–48 V switching applications requiring both speed and conduction performance.

Availability

2SD1803S-TL-H is available at Aetrix Electronics and suitable for relay drivers, DC-DC converters, motor control H-bridges, and high-speed inverters requiring stable component supply and long-term industrial availability.

Supply support for 2SD1803S-TL-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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The 2SD1803S-TL-H belongs to onsemi's general-purpose bipolar power transistor family, engineered for reliable high-current switching in industrial controls, power supplies, and motor drives where ruggedness and parameter consistency are critical.

FAQ

What is the maximum continuous collector current rating for 2SD1803S-TL-H?

The 2SD1803S-TL-H is rated for 5 A continuous collector current (I_C) at case temperature T_C = 25°C. At elevated case temperatures, derating applies per the PC–Ta curve; for example, at T_C = 75°C, the usable I_C drops to approximately 3.5 A. This rating assumes proper PCB copper area and thermal interface to maintain junction temperature ≤150°C.

Is 2SD1803S-TL-H pin-compatible with 2SB1203S-TL-H?

Yes, the 2SD1803S-TL-H and 2SB1203S-TL-H share identical TP-FA (TO-252) package outlines and pin assignments (Pin 1 = Base, Pins 2 & 4 = Collector, Pin 3 = Emitter), enabling direct complementary pairing in push-pull or H-bridge configurations without layout changes. Their matched V_CE(sat) and h_FE profiles further support balanced switching behavior.

What is the typical V_CE(sat) of 2SD1803S-TL-H under real switching conditions?

The 2SD1803S-TL-H exhibits a typical V_CE(sat) of 220 mV at I_C = 3 A and I_B = 0.15 A (I_C/I_B = 20), with a maximum of 400 mV under same conditions. This value is confirmed across production lots and remains stable from –25°C to +75°C ambient, supporting predictable conduction loss calculation in thermal design.

Does 2SD1803S-TL-H meet RoHS and halogen-free requirements?

Yes, the "-H" suffix in 2SD1803S-TL-H explicitly denotes compliance with both RoHS Directive 2011/65/EU and halogen-free standards (chlorine <900 ppm, bromine <900 ppm). This version uses lead-free matte tin plating and halogen-free molding compound, certified per onsemi's EN2085C specification and shipped in 700 pcs./reel tape-and-reel packaging.

Can 2SD1803S-TL-H be used in linear amplifier applications?

While primarily optimized for switching, the 2SD1803S-TL-H supports linear operation within its Safe Operating Area (SOA), with verified h_FE linearity across I_C = 0.1–4 A and f_T >130 MHz. However, its SOA limits continuous linear use to ≤2 W at T_C = 25°C due to P_C = 20 W being case-referenced; sustained analog gain stages require careful thermal design and derating.

2SD1803S-TL-H 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:: 140 @ 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

2SD1803S-TL-H FAQ

1.How can I place an order for 2SD1803S-TL-H through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SD1803S-TL-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 2SD1803S-TL-H reliable?

The price and inventory of 2SD1803S-TL-H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SD1803S-TL-H is usually 5 days.

3.What payment methods are accepted for 2SD1803S-TL-H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SD1803S-TL-H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SD1803S-TL-H?

2SD1803S-TL-H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SD1803S-TL-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 2SD1803S-TL-H?

For technical support, including 2SD1803S-TL-H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SD1803S-TL-H requirements.

6.How does Aetrix verify that 2SD1803S-TL-H is sourced from the original manufacturer or authorized distributors?

All 2SD1803S-TL-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 2SD1803S-TL-H meets industry standards.

7.What is the process for return or replacement of 2SD1803S-TL-H?

All 2SD1803S-TL-H units undergo pre-shipment inspection (PSI). If there is an issue with 2SD1803S-TL-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 2SD1803S-TL-H part is unused and in its original packaging.

Return procedure for 2SD1803S-TL-H:

1.Submit a request within 90 days.

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

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