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

onsemi 2SC3332T

Name: 2SC3332T
Brand: onsemi
SKU: 2SC3332T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SC3332T

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 (TO-226AA)

Datasheet:: 2SC3332T.pdf

Description:: TRANS NPN 160V 0.7A 3-NP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SC3332T from onsemi is a low-saturation-voltage NPN bipolar junction transistor rated for 160 V V_CEO, 0.7 A I_C, and 700 mW P_C, optimized for switching applications in power supplies and motor drivers where fast turn-on (50 ns) and robust SOA are required.

For engineers reviewing the 2SC3332T datasheet, pinout, applications, or equivalent options, key selection criteria include verified hFE rank T (200–400 at I_C = 100 mA), V_CE(sat) ≤ 0.4 V at I_C = 250 mA/I_B = 25 mA, f_T = 120 MHz, and SC-34A (TO-92) package compatibility with legacy through-hole layouts.

Technical Context

This NPN transistor employs onsemi's MBIT process to achieve high breakdown voltage (V_(BR)CBO = 180 V) and excellent hFE linearity across I_C = 10 mA to 100 mA. Its wide Safe Operating Area (SOA) supports pulsed operation up to I_CP = 1.5 A with minimal second-breakdown risk.

Designed for DC and pulse switching, the 2SC3332T delivers low V_CE(sat) (0.12–0.4 V) and fast switching times (t_on = 50 ns, t_f = 60 ns) under I_C/I_B = 10 drive conditions, with Cob = 8 pF at V_CB = 10 V enabling stable high-frequency performance.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	160 V - Maximum collector-emitter voltage before breakdown; enables use in 120 VAC-derived supply rails.
I_C	0.7 A continuous - Sustained current handling for relay drivers and small-motor control stages.
V_CE(sat)	0.12–0.4 V @ I_C=250 mA/I_B=25 mA - Low conduction loss reduces heat generation in linear/switching regulators.
hFE (Rank T)	200–400 @ V_CE=5 V, I_C=100 mA - Tight gain distribution simplifies base-drive design for consistent switching thresholds.
f_T	120 MHz - Supports high-speed switching up to ~10–20 MHz practical operating frequency with adequate gain margin.
Cob	8 pF @ V_CB=10 V - Low output capacitance minimizes Miller effect and improves turn-off speed in inductive loads.
t_on/t_f	50 ns / 60 ns - Fast switching enables efficient PWM operation in DC-DC converters and LED dimming circuits.

Pinout & Package

Package: SC-34A (JEDEC TO-92 variant, also designated TO-226AA and SOT-54), molded plastic with 0.269 g mass and standard lead spacing for through-hole PCB assembly.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current sink node; connected to ground or low-side return path in common-emitter switch configurations.
2	Collector	High-side load connection point; handles full switched current and must be routed with thermal relief for 700 mW dissipation.
3	Base	Control input requiring I_B ≈ I_C/10 for saturation; driven via series resistor to limit peak current during switching transients.

Key Features

Feature	Design Value
MBIT process technology	Enables high V_(BR)CBO (180 V) and tight hFE distribution without trade-offs in saturation voltage or switching speed.
Wide SOA	Supports safe single-pulse operation up to I_CP = 1.5 A with no secondary breakdown, critical for inductive load snubbing.
Low V_CE(sat)	0.12 V typical at I_C = 250 mA ensures <100 mW conduction loss, reducing heatsink requirements in compact designs.
hFE linearity	Minimal gain variation across I_C = 1–100 mA enables predictable base drive across load ranges in analog amplification or linear regulation.

Applications

Power Supply Switching	DC Motor Control
Use Scenario: Used as main switching transistor in offline flyback converters delivering ≤15 W output. IC Role / Device Role / Timing Role: NPN switch controlling primary-side current flow; driven by UC3842 or similar PWM controller. Use Value: V_CEO = 160 V accommodates reflected flyback voltage spikes; low V_CE(sat) maintains >85% efficiency at full load.	Use Scenario: Drives 12 V brushed DC motors in automotive HVAC actuators and industrial positioning systems. IC Role / Device Role / Timing Role: Low-side switch interfacing microcontroller GPIO to motor winding; operated in saturated switching mode. Use Value: Rank T hFE (200–400) ensures reliable saturation with 3.3 V MCU logic; 1.5 A pulse rating absorbs stall-current surges.
Relay Driver	LED Constant-Current Sink
Use Scenario: Interfaces microcontroller outputs to 5–24 V electromagnetic relays with coil currents up to 600 mA. IC Role / Device Role / Timing Role: Common-emitter amplifier providing high-current base drive to relay coil; includes flyback diode protection. Use Value: Wide SOA prevents failure during relay de-energization transients; t_f = 60 ns limits contact arcing duration.	Use Scenario: Sinks constant current for high-brightness indicator LEDs in industrial HMI panels and instrumentation displays. IC Role / Device Role / Timing Role: Linear-mode current regulator using emitter-resistor feedback; biased in active region for precise I_LED control. Use Value: Excellent hFE linearity ensures stable current over temperature; V_(BR)EBO = 6 V tolerates reverse LED transient voltages.

Power Supply Switching

DC Motor Control

Use Scenario: Used as main switching transistor in offline flyback converters delivering ≤15 W output.

IC Role / Device Role / Timing Role: NPN switch controlling primary-side current flow; driven by UC3842 or similar PWM controller.

Use Value: V_CEO = 160 V accommodates reflected flyback voltage spikes; low V_CE(sat) maintains >85% efficiency at full load.

Use Scenario: Drives 12 V brushed DC motors in automotive HVAC actuators and industrial positioning systems.

IC Role / Device Role / Timing Role: Low-side switch interfacing microcontroller GPIO to motor winding; operated in saturated switching mode.

Use Value: Rank T hFE (200–400) ensures reliable saturation with 3.3 V MCU logic; 1.5 A pulse rating absorbs stall-current surges.

Relay Driver

LED Constant-Current Sink

Use Scenario: Interfaces microcontroller outputs to 5–24 V electromagnetic relays with coil currents up to 600 mA.

IC Role / Device Role / Timing Role: Common-emitter amplifier providing high-current base drive to relay coil; includes flyback diode protection.

Use Value: Wide SOA prevents failure during relay de-energization transients; t_f = 60 ns limits contact arcing duration.

Use Scenario: Sinks constant current for high-brightness indicator LEDs in industrial HMI panels and instrumentation displays.

IC Role / Device Role / Timing Role: Linear-mode current regulator using emitter-resistor feedback; biased in active region for precise I_LED control.

Use Value: Excellent hFE linearity ensures stable current over temperature; V_(BR)EBO = 6 V tolerates reverse LED transient voltages.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SC3332S	Same package and absolute ratings; hFE rank S (140–280) vs. T (200–400); otherwise identical electrical specs.	Suitable where lower minimum hFE suffices; may require higher base drive for same I_C in marginal saturation cases.	Select 2SC3332S when cost sensitivity outweighs need for guaranteed high-gain margin at low I_C.
MPSA42	Higher V_CEO (300 V), lower I_C (0.5 A), higher V_CE(sat) (0.5–1.0 V), different pinout (E-B-C vs. E-C-B).	Better for higher-voltage flybacks (>200 V reflected), but less efficient at 0.5–0.7 A due to higher saturation loss.	Choose MPSA42 only if V_CEO > 160 V is mandatory; verify PCB layout compatibility due to reversed collector/base pins.

Compared with 2SC3332S and MPSA42, the 2SC3332T offers the optimal balance of high hFE margin, low V_CE(sat), and proven SOA for 12–24 V industrial switching-without requiring board redesign or sacrificing thermal performance.

Availability

2SC3332T is available at Aetrix Electronics and suitable for power supply switching, DC motor control, relay driving, and LED constant-current sink applications requiring stable component supply and long-term obsolescence management.

Supply support for 2SC3332T 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, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The 2SC3332T belongs to onsemi's general-purpose bipolar transistor product line, engineered for reliability-critical discrete switching in industrial controls, power conversion, and electromechanical interface circuits.

FAQ

What is the hFE rank specification for 2SC3332T?

The 2SC3332T is ranked T, meaning its DC current gain (hFE) is guaranteed between 200 and 400 when measured at V_CE = 5 V and I_C = 100 mA. This tighter range than the S-rank variant (140–280) provides more predictable base drive requirements in production designs. The 2SC3332T's hFE consistency supports robust saturation across temperature and aging, making it preferred for mission-critical switching nodes where gain margin matters.

Is 2SC3332T pin-compatible with 2SC3332S?

Yes, the 2SC3332T is fully pin-compatible with the 2SC3332S - both share identical SC-34A (TO-92) package dimensions, lead assignment (Emitter–Collector–Base), and mechanical footprint. No PCB layout change is needed when substituting between these two ranks. The only functional difference lies in hFE distribution; all absolute maximum ratings, switching times, saturation voltages, and thermal characteristics remain identical for the 2SC3332T and 2SC3332S.

What is the maximum pulsed collector current rating for 2SC3332T?

The 2SC3332T supports a maximum pulsed collector current (I_CP) of 1.5 A under specified test conditions (pulse width = 20 μs, duty cycle ≤ 1%). This rating reflects its wide Safe Operating Area (SOA), allowing brief current surges beyond its 0.7 A continuous rating - essential for absorbing motor stall currents or relay coil turn-off transients. Engineers must ensure pulse timing and thermal management comply with the SOA curve in the 2SC3332T datasheet to avoid second breakdown.

Does 2SC3332T meet RoHS and Pb-free requirements?

Yes, the 2SC3332T is Pb-free and RoHS-compliant, as confirmed in the official onsemi datasheet (Ordering Information section). The "2SC3332T" variant shipped in 500 pcs./bag packaging carries the Pb-free designation, and the device uses matte tin lead finish per JEDEC J-STD-609. This makes the 2SC3332T suitable for environmentally regulated industrial and consumer applications without requiring exemptions or special handling.

Can 2SC3332T replace MPSA42 in high-voltage applications?

No, the 2SC3332T is not a drop-in replacement for MPSA42 in high-voltage applications because its V_CEO rating is 160 V versus MPSA42's 300 V. Using the 2SC3332T in circuits where collector voltage exceeds 160 V risks catastrophic breakdown. Additionally, the 2SC3332T has reversed pinout (E-C-B) compared to MPSA42 (E-B-C), so direct socket substitution would misconnect collector and base. Always verify voltage stress and pin mapping before interchanging the 2SC3332T and MPSA42.

2SC3332T Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA)

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 700 mA

Voltage - Collector Emitter Breakdown (Max):: 160 V

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 25mA, 250mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 100mA, 5V

Power - Max:: 700 mW

Frequency - Transition:: 120MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 3-NP

2SC3332T FAQ

1.How can I place an order for 2SC3332T through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SC3332T 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 2SC3332T reliable?

The price and inventory of 2SC3332T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC3332T is usually 5 days.

3.What payment methods are accepted for 2SC3332T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC3332T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SC3332T?

2SC3332T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SC3332T 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 2SC3332T?

For technical support, including 2SC3332T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC3332T requirements.

6.How does Aetrix verify that 2SC3332T is sourced from the original manufacturer or authorized distributors?

All 2SC3332T 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 2SC3332T meets industry standards.

7.What is the process for return or replacement of 2SC3332T?

All 2SC3332T units undergo pre-shipment inspection (PSI). If there is an issue with 2SC3332T, 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 2SC3332T part is unused and in its original packaging.

Return procedure for 2SC3332T:

1.Submit a request within 90 days.

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

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