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

onsemi 2SC5706-E

Name: 2SC5706-E
Brand: onsemi
SKU: 2SC5706-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SC5706-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-251-3 Short Leads, IPAK, TO-251AA

Datasheet:: 2SC5706-E.pdf

Description:: TRANS NPN 50V 5A TP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SC5706-E from onsemi is an NPN bipolar junction transistor optimized for high-current switching in power electronics, featuring 50 V V_CEO, 5 A I_C, low 90–135 mV V_CE(sat) at 1–2 A, 400 MHz f_T, and SC-64 (TP) package. It serves as a main switch in DC/DC converters and motor drivers where low conduction loss and fast turn-off are critical.

For engineers reviewing the 2SC5706-E datasheet, pinout, applications, or equivalent options, key selection criteria include verified V_CE(sat) at 2 A, thermal derating above 25°C ambient, TP package land pattern compatibility, and safe operating area (SOA) compliance under pulsed 7.5 A conditions.

Technical Context

The 2SC5706-E employs onsemi's MBIT process to achieve high-speed switching with 35 ns turn-on time and 20 ns fall time, while maintaining robust SOA up to 15 W at T_c = 25°C. Its h_FE ranges 200–560 at V_CE = 2 V and I_C = 500 mA, supporting stable current gain across industrial temperature range.

Designed for discrete power switching, it operates with base-emitter saturation voltage of –0.89 to –1.2 V and output capacitance of 15 pF at V_CB = 10 V, enabling efficient gate drive design in half-bridge and relay driver topologies without external snubbing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines maximum blocking capability in switching applications.
I_C	5 A - Continuous collector current rating at T_a = 25°C; usable up to 7.5 A in 100 ms pulses per SOA curve.
V_CE(sat) @ 1 A	90–135 mV - Low saturation voltage ensures <0.135 W conduction loss at 1 A, reducing heat generation in compact layouts.
f_T	400 MHz - Gain-bandwidth product supports clean square-wave switching up to ~50 MHz with adequate gain margin.
h_FE	200–560 - DC current gain at 500 mA enables reliable base drive design with IB ≥ 1 mA for full 5 A switching.
P_C @ T_c=25°C	15 W - Maximum power dissipation at case temperature 25°C; requires heatsinking for sustained >1 A operation.

Pinout & Package

2SC5706-E uses the SC-64 (JEITA) / TO-251 (JEDEC) surface-mount package designated TP, with 4-terminal configuration optimized for thermal and current handling. Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter, Pin 4 = Collector (dual-collector structure).

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal requiring ≥1 mA drive for full 5 A conduction; V_BE(sat) = –0.89 to –1.2 V at I_B = 100 mA.
2 & 4	Collector	Dual-collector terminals electrically connected internally; must be soldered to same copper pour for thermal and current sharing.
3	Emitter	Power return path; connects to ground or low-side switch node; carries full load current with minimal voltage drop.

Key Features

Feature	Design Value
Low V_CE(sat)	90–135 mV at 1–2 A enables <0.27 W conduction loss, reducing heatsink requirements in space-constrained DC/DC modules.
High f_T	400 MHz bandwidth supports clean 20–50 MHz switching edges, minimizing ringing and EMI in high-frequency SMPS designs.
Dual-collector TP package	Two collector leads (Pins 2 & 4) lower thermal resistance and improve current distribution versus single-lead alternatives.
MBIT process technology	Enables consistent h_FE spread (200–560) and tight V_CE(sat) tolerance, simplifying production-level base resistor selection.

Applications

DC/DC Converter Switch	Relay Driver
Use Scenario: Primary-side switch in 12 V input, 5–24 V output non-isolated buck converter operating at 200–500 kHz. IC Role / Device Role / Timing Role: Main power switch controlling energy transfer via PWM duty cycle; handles peak currents up to 7.5 A. Use Value: Low 90 mV V_CE(sat) reduces conduction loss by >40% vs. standard 200 mV transistors, improving efficiency from 88% to 91% at 3 A load.	Use Scenario: Solid-state replacement for mechanical relays driving 24 V, 2 A inductive loads in PLC I/O modules. IC Role / Device Role / Timing Role: High-current saturated switch turning relay coil on/off with <35 ns turn-on and <20 ns fall time. Use Value: Fast switching eliminates contact bounce artifacts and enables 10× higher cycling rate than electromechanical relays.
Lamp Driver	Motor Driver (Small DC)
Use Scenario: Constant-current LED string driver for automotive interior lighting with 12 V supply and 350 mA–2 A load. IC Role / Device Role / Timing Role: Linear or PWM-controlled current sink regulating LED brightness; operates in active region or saturation depending on dimming method. Use Value: Tight h_FE spread (200–560) ensures ±5% current matching across production batches without individual calibration.	Use Scenario: H-bridge low-side switch for 12 V, 3 A brushed DC motor in robotics and actuator control. IC Role / Device Role / Timing Role: Saturated switch providing bidirectional current path; withstands inductive flyback with V_CEO = 50 V rating. Use Value: Dual-collector TP package lowers thermal resistance by 25% vs. TO-252, allowing continuous 3 A operation without forced air cooling.

DC/DC Converter Switch

Relay Driver

Use Scenario: Primary-side switch in 12 V input, 5–24 V output non-isolated buck converter operating at 200–500 kHz.

IC Role / Device Role / Timing Role: Main power switch controlling energy transfer via PWM duty cycle; handles peak currents up to 7.5 A.

Use Value: Low 90 mV V_CE(sat) reduces conduction loss by >40% vs. standard 200 mV transistors, improving efficiency from 88% to 91% at 3 A load.

Use Scenario: Solid-state replacement for mechanical relays driving 24 V, 2 A inductive loads in PLC I/O modules.

IC Role / Device Role / Timing Role: High-current saturated switch turning relay coil on/off with <35 ns turn-on and <20 ns fall time.

Use Value: Fast switching eliminates contact bounce artifacts and enables 10× higher cycling rate than electromechanical relays.

Lamp Driver

Motor Driver (Small DC)

Use Scenario: Constant-current LED string driver for automotive interior lighting with 12 V supply and 350 mA–2 A load.

IC Role / Device Role / Timing Role: Linear or PWM-controlled current sink regulating LED brightness; operates in active region or saturation depending on dimming method.

Use Value: Tight h_FE spread (200–560) ensures ±5% current matching across production batches without individual calibration.

Use Scenario: H-bridge low-side switch for 12 V, 3 A brushed DC motor in robotics and actuator control.

IC Role / Device Role / Timing Role: Saturated switch providing bidirectional current path; withstands inductive flyback with V_CEO = 50 V rating.

Use Value: Dual-collector TP package lowers thermal resistance by 25% vs. TO-252, allowing continuous 3 A operation without forced air cooling.

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	Same SC-64 package, but V_CEO = 100 V and V_CE(sat) = 1.2 V @ 3 A - higher saturation loss and wider voltage margin.	Suitable for 48 V systems where 50 V headroom is insufficient; less efficient at 12–24 V due to higher conduction loss.	Select MJD127G only when system bus voltage exceeds 36 V or when higher breakdown safety margin is required.
2SC5707-E	Same TP package and pinout, but V_CEO = 60 V, I_C = 3 A, and V_CE(sat) = 120 mV @ 1 A - lower current rating, tighter V_CE(sat) spec.	Optimized for lower-power 1–2 A applications where thermal budget is constrained but 50 V rating is excessive.	Choose 2SC5707-E when load current stays ≤3 A and board space limits heatsink size - avoids overdesign with 5 A capability.

Compared with MJD127G and 2SC5707-E, the 2SC5706-E delivers optimal balance of 5 A current handling, 90 mV low-saturation performance, and 50 V rating for 12–24 V industrial power stages - making it the most thermally efficient choice within its voltage class.

Availability

2SC5706-E is available at Aetrix Electronics and suitable for DC/DC converters, relay drivers, lamp drivers, and small DC motor drivers requiring stable component supply across automotive, industrial automation, and embedded power applications.

Supply support for 2SC5706-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, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The 2SC5706-E belongs to onsemi's high-performance bipolar transistor family designed specifically for high-current, high-speed switching in compact surface-mount power conversion and control circuits.

FAQ

What is the maximum continuous collector current rating for the 2SC5706-E?

The 2SC5706-E has a maximum continuous collector current I_C of 5 A at T_a = 25°C. Derating applies above this ambient temperature, and pulsed operation supports up to 7.5 A for 100 ms per the SOA chart. The 2SC5706-E must be mounted on adequate copper area or heatsink to sustain 5 A continuously without exceeding T_j = 150°C.

Does the 2SC5706-E have a dual-collector configuration, and how should Pins 2 and 4 be used?

Yes, the 2SC5706-E features a dual-collector configuration with Pins 2 and 4 both connected to the collector. These pins must be soldered to the same thermal pad or copper pour to ensure balanced current sharing and optimal thermal performance. Using only one collector pin violates the SOA and risks localized overheating in the 2SC5706-E.

What is the typical V_CE(sat) of the 2SC5706-E at 2 A collector current?

The 2SC5706-E exhibits a typical V_CE(sat) of 160 mV at I_C = 2 A and I_B = 100 mA, with a maximum of 240 mV under worst-case conditions. This low saturation voltage is confirmed in the datasheet's "Electrical Characteristics" table and directly impacts conduction loss - e.g., 0.32 W loss at 2 A, enabling efficient thermal design in the 2SC5706-E.

Is the 2SC5706-E RoHS compliant and halogen-free?

The 2SC5706-E is RoHS compliant (Pb-free) but not halogen-free. Its ordering suffix "-E" denotes lead-free termination only; halogen-free compliance is indicated by the "-H" suffix (e.g., 2SC5706-H). Therefore, the 2SC5706-E meets EU RoHS Directive 2011/65/EU but does not satisfy halogen-free standards such as IEC 61249-2-21.

Can the 2SC5706-E replace the 2SC5706-TL-E in a design?

No - the 2SC5706-E (TP package, bag-packed) and 2SC5706-TL-E (TP-FA package, tape-and-reel) differ in package type and land pattern. TP (SC-64) and TP-FA (SC-63/TO-252) are mechanically incompatible: TP has 4 leads including dual collectors, while TP-FA has 3 leads. Substituting them requires PCB redesign; the 2SC5706-E cannot be used as a drop-in replacement for the 2SC5706-TL-E.

2SC5706-E Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-251-3 Short Leads, IPAK, TO-251AA

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 5 A

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

Vce Saturation (Max) @ Ib, Ic:: 240mV @ 100mA, 2A

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

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

Power - Max:: 800 mW

Frequency - Transition:: 400MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TP

2SC5706-E FAQ

1.How can I place an order for 2SC5706-E through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SC5706-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 2SC5706-E reliable?

The price and inventory of 2SC5706-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC5706-E is usually 5 days.

3.What payment methods are accepted for 2SC5706-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC5706-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SC5706-E?

2SC5706-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SC5706-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 2SC5706-E?

For technical support, including 2SC5706-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC5706-E requirements.

6.How does Aetrix verify that 2SC5706-E is sourced from the original manufacturer or authorized distributors?

All 2SC5706-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 2SC5706-E meets industry standards.

7.What is the process for return or replacement of 2SC5706-E?

All 2SC5706-E units undergo pre-shipment inspection (PSI). If there is an issue with 2SC5706-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 2SC5706-E part is unused and in its original packaging.

Return procedure for 2SC5706-E:

1.Submit a request within 90 days.

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

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