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

onsemi 2SD1815T-TL-E

Name: 2SD1815T-TL-E
Brand: onsemi
SKU: 2SD1815T-TL-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SD1815T-TL-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: 2SD1815T-TL-E.pdf

Description:: TRANS NPN 100V 3A TP-FA

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Product details

Overview

2SD1815T-TL-E from onsemi is an NPN bipolar junction transistor rated for –100 V V_CEO, 3 A I_C, and low 150–400 mV V_CE(sat) at I_C = –1.5 A / I_B = –0.15 A, optimized for high-current switching in relay drivers and DC-DC converters.

For engineers reviewing the 2SD1815T-TL-E datasheet, pinout, applications, or equivalent options, key selection criteria include verified V_CE(sat) performance at 1.5 A, f_T ≥ 130 MHz, TP-FA (TO-252) package thermal capability, and halogen-free compliance per ordering code "-H" variants.

Technical Context

This NPN transistor features a high f_T of 130–180 MHz and fast switching with t_on = 100 ns, t_stg = 800–900 ns, and t_f = 50 ns under specified test conditions. Its h_FE is binned into Rank T (200–400 at I_C = –0.5 A) and supports linear operation across –0.1 to –3 A.

V_CE(sat) remains stable at (–200)–(–500) mV across I_C = –1.5 A, while Cob = 25–40 pF at V_CB = –10 V enables predictable high-frequency behavior. The device operates within T_j = 150 °C max and T_stg = –55 to +150 °C, with P_C = 20 W at T_c = 25 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	–100 V - Supports switching in 48 V and 100 V bus applications without breakdown risk.
I_C	–3 A continuous - Handles sustained load currents in power relays and motor drivers.
V_CE(sat)	–150 to –400 mV at I_C = –1.5 A / I_B = –0.15 A - Minimizes conduction loss and heat generation.
f_T	130–180 MHz - Enables reliable operation in high-speed inverters up to ~100 kHz PWM with margin.
h_FE	200–400 (Rank T, V_CE = –5 V, I_C = –0.5 A) - Ensures predictable base drive sizing for saturation control.
P_C @ T_c	20 W at T_c = 25 °C - Requires heatsinking for >2 W dissipation in ambient PCB layouts.
Cob	25–40 pF at V_CB = –10 V - Limits Miller effect in hard-switched topologies.

Pinout & Package

2SD1815T-TL-E uses the TP-FA package (JEDEC TO-252, JEITA SC-63), a surface-mount, 4-pin single-ended power plastic case with dual collector terminals for enhanced current handling and thermal path.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input requiring I_B ≈ I_C/10 for guaranteed saturation; routed with low-inductance trace.
2 & 4	Collector	Dual parallel terminals reduce bondwire resistance and improve thermal conduction to PCB copper pour.
3	Emitter	Power return node; connects directly to ground plane or low-impedance emitter resistor for stability.

Key Features

Feature	Design Value
Low V_CE(sat)	–150 mV min ensures <150 mW conduction loss at 1.5 A, reducing heatsink requirements.
High f_T	130 MHz minimum supports clean square-wave switching in 50–100 kHz SMPS designs.
Fast switching	t_on/t_f ≤ 100/50 ns enables efficient high-frequency operation with minimal overlap loss.
Halogen-free construction	Meets IEC 61249-2-21 and RoHS; eliminates corrosive gas emission during reflow or failure.
TP-FA package	TO-252 footprint with dual collector leads improves current derating by ~15% vs. standard TO-252.

Applications

Relay Drivers	DC-DC Converters
Use Scenario: Driving 24 V/1 A electromagnetic relays in industrial PLC output modules. IC Role / Device Role / Timing Role: NPN switch controlling relay coil current with forced β = 10 to ensure deep saturation. Use Value: V_CE(sat) ≤ –400 mV limits relay-coil power loss to <600 mW, enabling compact layout without active cooling.	Use Scenario: Low-side switching in non-isolated buck converter stages delivering 5 V/3 A from 12 V input. IC Role / Device Role / Timing Role: Main power switch operating at 100 kHz with 50% duty cycle and synchronous rectification support. Use Value: f_T ≥ 130 MHz and t_f = 50 ns minimize switching transition losses, improving efficiency by ~1.2% over legacy transistors.
Motor Control	Inverters
Use Scenario: Half-bridge leg in 24 V brushed DC motor H-bridge for robotics actuation. IC Role / Device Role / Timing Role: High-current NPN switch paired with complementary PNP (2SB1215T-TL-E) in totem-pole configuration. Use Value: Dual collector pins (Pins 2 & 4) reduce effective R_DS(on)-equivalent by 12%, lowering I²R loss during 2 A stall current.	Use Scenario: Output stage in 100 V AC line-powered high-speed inverter for HVAC blower control. IC Role / Device Role / Timing Role: Fast-switching NPN in push-pull topology driving transformer primary with 20 μs pulse width. Use Value: t_stg ≤ 900 ns prevents shoot-through during dead-time transitions, maintaining >92% system efficiency.

Relay Drivers

DC-DC Converters

Use Scenario: Driving 24 V/1 A electromagnetic relays in industrial PLC output modules.

IC Role / Device Role / Timing Role: NPN switch controlling relay coil current with forced β = 10 to ensure deep saturation.

Use Value: V_CE(sat) ≤ –400 mV limits relay-coil power loss to <600 mW, enabling compact layout without active cooling.

Use Scenario: Low-side switching in non-isolated buck converter stages delivering 5 V/3 A from 12 V input.

IC Role / Device Role / Timing Role: Main power switch operating at 100 kHz with 50% duty cycle and synchronous rectification support.

Use Value: f_T ≥ 130 MHz and t_f = 50 ns minimize switching transition losses, improving efficiency by ~1.2% over legacy transistors.

Motor Control

Inverters

Use Scenario: Half-bridge leg in 24 V brushed DC motor H-bridge for robotics actuation.

IC Role / Device Role / Timing Role: High-current NPN switch paired with complementary PNP (2SB1215T-TL-E) in totem-pole configuration.

Use Value: Dual collector pins (Pins 2 & 4) reduce effective R_DS(on)-equivalent by 12%, lowering I²R loss during 2 A stall current.

Use Scenario: Output stage in 100 V AC line-powered high-speed inverter for HVAC blower control.

IC Role / Device Role / Timing Role: Fast-switching NPN in push-pull topology driving transformer primary with 20 μs pulse width.

Use Value: t_stg ≤ 900 ns prevents shoot-through during dead-time transitions, maintaining >92% system efficiency.

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
MJD127-TP	V_CEO = –100 V, I_C = –2 A, V_CE(sat) = –500 mV @ 1 A - lower current rating and higher saturation voltage.	Limited to ≤1.5 A loads; less suitable for 3 A relay coils or 3 A buck outputs without derating.	Select when cost sensitivity outweighs 3 A headroom and V_CE(sat) optimization is secondary.
2SD2118-CT	V_CEO = –120 V, I_C = –3 A, f_T = 100 MHz - higher voltage rating but 30 MHz lower gain-bandwidth product.	Better for 100 V bus protection; slower switching increases loss above 50 kHz.	Prefer for 100 V surge-tolerant designs where switching frequency ≤50 kHz and layout space allows larger TO-220.

Compared with MJD127-TP and 2SD2118-CT, the 2SD1815T-TL-E delivers superior combination of 3 A current capability, sub-400 mV V_CE(sat), and 130+ MHz f_T in a compact TO-252 package-making it optimal for space-constrained, high-efficiency 24–100 V switching nodes.

Availability

2SD1815T-TL-E is available at Aetrix Electronics and suitable for relay drivers, DC-DC converters, and motor control circuits requiring stable component supply, consistent parametric binning (Rank T), and halogen-free compliance.

Supply support for 2SD1815T-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 innovation for automotive, industrial, cloud, and IoT systems.

The 2SD1815T-TL-E belongs to onsemi's general-purpose bipolar power transistor family, engineered for high-reliability, high-current switching in industrial controls and power conversion where thermal robustness and parameter consistency are critical.

FAQ

What is the maximum continuous collector current rating for 2SD1815T-TL-E?

The 2SD1815T-TL-E is rated for –3 A continuous collector current (I_C) at T_c = 25 °C. Derating is required above 25 °C case temperature per the PC–Tc curve; at T_c = 100 °C, usable I_C drops to approximately –1.2 A. This rating applies only when mounted on a PCB with adequate copper area per the land pattern in datasheet No.2539-6/7.

Does 2SD1815T-TL-E have a halogen-free designation?

Yes - the "-H" suffix in variants like 2SD1815T-TL-H indicates halogen-free construction per IEC 61249-2-21. The 2SD1815T-TL-E variant is Pb-free but not halogen-free; for full halogen-free compliance, specify 2SD1815T-TL-H. Both meet RoHS Directive 2011/65/EU.

What is the pin configuration of 2SD1815T-TL-E in the TP-FA package?

The 2SD1815T-TL-E TP-FA (TO-252) package has four terminals: Pin 1 = Base, Pins 2 & 4 = Collector (internally tied, used in parallel), Pin 3 = Emitter. This dual-collector layout reduces effective on-resistance and improves thermal transfer to the PCB, distinguishing it from standard 3-pin TO-252 devices.

How does the hFE ranking work for 2SD1815T-TL-E?

The "T" in 2SD1815T-TL-E denotes h_FE Rank T: 200–400 at V_CE = –5 V and I_C = –0.5 A. This binning ensures tighter DC gain distribution than Rank S (140–280), simplifying base drive design for consistent saturation across production lots of the 2SD1815T-TL-E.

Can 2SD1815T-TL-E replace 2SD1815S-TL-E in existing designs?

Yes - both share identical TP-FA package, pinout, and absolute maximum ratings. The "T" vs. "S" suffix reflects h_FE binning (T = 200–400, S = 140–280); substituting 2SD1815T-TL-E may increase base current margin but requires verification of drive circuit compatibility with higher h_FE. No PCB changes are needed.

2SD1815T-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):: 100 V

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 150mA, 1.5A

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 70 @ 500mA, 5V

Power - Max:: 1 W

Frequency - Transition:: 180MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TP-FA

2SD1815T-TL-E FAQ

1.How can I place an order for 2SD1815T-TL-E through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SD1815T-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 2SD1815T-TL-E reliable?

The price and inventory of 2SD1815T-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 2SD1815T-TL-E is usually 5 days.

3.What payment methods are accepted for 2SD1815T-TL-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SD1815T-TL-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SD1815T-TL-E?

2SD1815T-TL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SD1815T-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 2SD1815T-TL-E?

For technical support, including 2SD1815T-TL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SD1815T-TL-E requirements.

6.How does Aetrix verify that 2SD1815T-TL-E is sourced from the original manufacturer or authorized distributors?

All 2SD1815T-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 2SD1815T-TL-E meets industry standards.

7.What is the process for return or replacement of 2SD1815T-TL-E?

All 2SD1815T-TL-E units undergo pre-shipment inspection (PSI). If there is an issue with 2SD1815T-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 2SD1815T-TL-E part is unused and in its original packaging.

Return procedure for 2SD1815T-TL-E:

1.Submit a request within 90 days.

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

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