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

onsemi 2SD1061S

Name: 2SD1061S
Brand: onsemi
SKU: 2SD1061S
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SD1061S

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: 2SD1061S.pdf

Description:: TRANS NPN 50V 7A TO-220AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SD1061S from SANYO is an NPN epitaxial planar silicon power transistor rated for 50V V_CEO, 7A I_C, and 40W P_C at T_c=25°C, optimized for high-current switching in solenoid drivers and DC-DC converters. It features low saturation voltage (V_CE(sat) ≤ –0.4V at I_C = –4A, I_B = –0.4A), wide SOA, and TO-220AB package with emitter-base-collector pinout.

For engineers reviewing the 2SD1061S datasheet, pinout, applications, or equivalent options, key selection criteria include verified V_CE(sat) performance at ≥4A, SOA compliance under pulsed 12A conditions, thermal derating above 25°C ambient, and compatibility with standard TO-220 heatsinking footprints.

Technical Context

The 2SD1061S operates as a single NPN bipolar junction transistor with fixed emitter-base-collector terminal assignment and no integrated biasing or protection circuitry. Its switching behavior is defined by DC current gain (h_FE = 70–200 at I_C = –1A, V_CE = –2V) and transient response (t_on = 2.0µs, t_f = 3.0µs).

It requires external base drive control and relies on its wide Safe Operating Area (SOA) - supporting 12A peak collector current for 1ms pulses - to sustain short-duration overload conditions without secondary breakdown, unlike smaller-signal transistors limited to DC or narrow pulse operation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50V - Maximum collector-emitter voltage before breakdown with open base; sets upper rail limit for switch applications.
I_C (DC)	7A - Continuous collector current rating at T_c = 25°C; defines steady-state load-handling capability.
P_C	40W - Maximum collector dissipation at case temperature 25°C; determines heatsink sizing requirement.
V_CE(sat)	≤ –0.4V at I_C = –4A, I_B = –0.4A - Confirmed low conduction loss enabling <1.6W power loss at full rated current.
h_FE	70–200 at I_C = –1A, V_CE = –2V - Validated DC current gain range for reliable base drive design.
t_on/t_f	2.0µs / 3.0µs - Measured turn-on and fall times under specified test conditions; enables ~200kHz switching in hard-switched topologies.

Pinout & Package

SANYO TO-220AB package: 3-terminal through-hole mounting with metal tab (collector) electrically connected to pin 2; requires insulated mounting hardware when collector is not at chassis ground.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input requiring externally sourced current; base-emitter forward voltage ≈ –1.0V at rated I_B.
2	Collector	Main high-current output node; electrically tied to metal tab; must be isolated if not referenced to system ground.
3	Emitter	Current return path; common reference for base drive and load; polarity confirms NPN configuration.

Key Features

Feature	Design Value
Low V_CE(sat)	≤ –0.4V at I_C = –4A ensures <1.6W conduction loss, reducing thermal stress in high-duty-cycle switches.
Wide SOA	Supports 12A/1ms single-pulse operation without secondary breakdown, enabling robust surge handling in motor/solenoid loads.
TO-220AB Package	Standardized mechanical footprint with integral heat-spreading tab; compatible with industry-standard clip-on heatsinks.
High h_FE Range	70–200 at I_C = –1A allows flexible base drive design - lower I_B reduces driver-stage power consumption.

Applications

Solenoid Driver	DC-DC Converter Switch
Use Scenario: Driving 24V industrial solenoids drawing up to 6A peak current with 100ms activation pulses. IC Role / Device Role / Timing Role: Main NPN power switch controlling solenoid coil current path; turned on/off via microcontroller GPIO through base resistor network. Use Value: Low V_CE(sat) minimizes coil voltage drop and self-heating during sustained actuation, extending solenoid life.	Use Scenario: High-side switch in non-isolated buck converter delivering 5V/5A from 24V input. IC Role / Device Role / Timing Role: Primary switching element operating at 100kHz with 30% duty cycle; driven by dedicated gate/base controller. Use Value: Verified 2.0µs t_on and wide SOA enable stable operation under load transients without desaturation or thermal runaway.
Inverter Half-Bridge	Motor Starter Circuit
Use Scenario: Upper-leg switch in 48V BLDC inverter half-bridge driving 300W permanent-magnet motor. IC Role / Device Role / Timing Role: High-side NPN switch paired with complementary PNP (2SB825); commutated via isolated base drive. Use Value: Matched h_FE range and SOA symmetry with 2SB825 ensure balanced conduction and switching losses across both legs.	Use Scenario: Starter relay replacement in automotive HVAC blower motor control, handling 15A inrush current. IC Role / Device Role / Timing Role: Solid-state replacement for electromechanical relay; switched via vehicle ECU PWM signal. Use Value: 12A/1ms SOA withstands locked-rotor inrush without failure, eliminating contact wear and bounce issues.

Solenoid Driver

DC-DC Converter Switch

Use Scenario: Driving 24V industrial solenoids drawing up to 6A peak current with 100ms activation pulses.

IC Role / Device Role / Timing Role: Main NPN power switch controlling solenoid coil current path; turned on/off via microcontroller GPIO through base resistor network.

Use Value: Low V_CE(sat) minimizes coil voltage drop and self-heating during sustained actuation, extending solenoid life.

Use Scenario: High-side switch in non-isolated buck converter delivering 5V/5A from 24V input.

IC Role / Device Role / Timing Role: Primary switching element operating at 100kHz with 30% duty cycle; driven by dedicated gate/base controller.

Use Value: Verified 2.0µs t_on and wide SOA enable stable operation under load transients without desaturation or thermal runaway.

Inverter Half-Bridge

Motor Starter Circuit

Use Scenario: Upper-leg switch in 48V BLDC inverter half-bridge driving 300W permanent-magnet motor.

IC Role / Device Role / Timing Role: High-side NPN switch paired with complementary PNP (2SB825); commutated via isolated base drive.

Use Value: Matched h_FE range and SOA symmetry with 2SB825 ensure balanced conduction and switching losses across both legs.

Use Scenario: Starter relay replacement in automotive HVAC blower motor control, handling 15A inrush current.

IC Role / Device Role / Timing Role: Solid-state replacement for electromechanical relay; switched via vehicle ECU PWM signal.

Use Value: 12A/1ms SOA withstands locked-rotor inrush without failure, eliminating contact wear and bounce issues.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SD1761	V_CEO = 60V, I_C = 5A, P_C = 30W, TO-220 package	Lower current/power rating; narrower SOA limits pulsed overload tolerance	Select when higher voltage margin is required and peak current stays below 5A.
MJD127	V_CEO = 100V, I_C = 8A, P_C = 30W, TO-252 (DPAK) package	Surface-mount package; lower thermal resistance but reduced SOA at high V_CE	Prefer for space-constrained PCBs where reflow assembly and moderate SOA suffice.

Compared with 2SD1061S, 2SD1761 trades current headroom for higher voltage rating, while MJD127 offers SMT compatibility at the cost of pulsed SOA robustness - making 2SD1061S optimal for through-hole, high-reliability 7A switching where thermal and surge margins are critical.

Availability

2SD1061S is available at Aetrix Electronics and suitable for solenoid driving, high-speed inverter stages, and DC-DC converter switching applications requiring stable component supply, long-term BOM continuity, and traceable sourcing.

Supply support for 2SD1061S 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

SANYO Electric Co., Ltd. was a Japanese semiconductor manufacturer specializing in power discrete devices, analog ICs, and optoelectronics before its acquisition by Panasonic in 2012.

The 2SD1061S belongs to SANYO's legacy high-current bipolar transistor family designed specifically for industrial switching applications demanding low saturation loss, rugged SOA, and proven reliability in 24–48V systems.

FAQ

What is the maximum continuous collector current rating for the 2SD1061S?

The 2SD1061S has a maximum continuous collector current (I_C) rating of 7A at case temperature T_c = 25°C. This rating decreases with rising case temperature per the derating curve in the datasheet - at T_c = 100°C, the usable I_C drops to approximately 3.5A. The 2SD1061S must be mounted on an appropriately sized heatsink to maintain safe junction temperature under sustained load.

Does the 2SD1061S have a built-in base-emitter resistor or protection diode?

No, the 2SD1061S is a bare NPN bipolar transistor with no integrated resistors or protection diodes. It requires external base current limiting and, in inductive switching applications, an external flyback diode across the load. The 2SD1061S pinout (base-collector-emitter) and electrical characteristics assume discrete external biasing components.

Can the 2SD1061S be used as a direct replacement for the 2SB825 in complementary circuits?

No - the 2SD1061S is an NPN device, while the 2SB825 is its complementary PNP counterpart. They share identical package (TO-220AB), voltage/current ratings, and SOA, but opposite polarity. In complementary circuits like push-pull or half-bridge configurations, the 2SD1061S replaces only NPN positions; substituting it for a 2SB825 would reverse current flow and cause circuit failure.

What is the Safe Operating Area (SOA) limit for single-pulse operation of the 2SD1061S?

The 2SD1061S supports a single-pulse SOA up to 12A at V_CE = 10V for durations of 1ms, as confirmed in the datasheet's ASO curves. At lower voltages (e.g., V_CE = 2V), it sustains 12A for up to 100ms. These limits are strictly time-bound and non-repetitive; exceeding them risks secondary breakdown. The 2SD1061S datasheet provides graphical SOA boundaries for precise design validation.

Is the metal tab of the 2SD1061S electrically connected to any internal terminal?

Yes, the metal tab of the 2SD1061S is internally connected to pin 2 (collector). This is standard for SANYO TO-220AB devices. When mounting the 2SD1061S to a heatsink, electrical isolation (e.g., mica washer + shoulder washer) is required unless the collector node is intentionally tied to chassis ground. Failure to isolate may cause short-circuit faults in floating-collector configurations.

2SD1061S Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-3

Packaging:: Bulk

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 7 A

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

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 400mA, 4A

Current - Collector Cutoff (Max):: 100µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 140 @ 1A, 2V

Power - Max:: 40 W

Frequency - Transition:: 10MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AB

2SD1061S FAQ

1.How can I place an order for 2SD1061S through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SD1061S 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 2SD1061S reliable?

The price and inventory of 2SD1061S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SD1061S is usually 5 days.

3.What payment methods are accepted for 2SD1061S?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SD1061S transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SD1061S?

2SD1061S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SD1061S 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 2SD1061S?

For technical support, including 2SD1061S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SD1061S requirements.

6.How does Aetrix verify that 2SD1061S is sourced from the original manufacturer or authorized distributors?

All 2SD1061S 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 2SD1061S meets industry standards.

7.What is the process for return or replacement of 2SD1061S?

All 2SD1061S units undergo pre-shipment inspection (PSI). If there is an issue with 2SD1061S, 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 2SD1061S part is unused and in its original packaging.

Return procedure for 2SD1061S:

1.Submit a request within 90 days.

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

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