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

onsemi KSC2334OTU

Name: KSC2334OTU
Brand: onsemi
SKU: KSC2334OTU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSC2334OTU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: KSC2334OTU.pdf

Description:: TRANS NPN 100V 7A TO-220-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSC2334OTU from ON Semiconductor is an NPN epitaxial silicon power transistor in TO-220 package, rated for 100 V V_CEO, 7 A DC collector current, and 40 W collector dissipation at T_C = 25°C. It delivers high-speed switching performance with t_ON/t_F of 0.5 µs/1.5 µs and low saturation voltages (V_CE(sat) = 0.6 V @ I_C = 5 A, I_B = 0.5 A), suited for industrial motor control and SMPS primary-side switching.

For engineers reviewing the KSC2334OTU datasheet, pinout, applications, or equivalent options, key selection criteria include its 100 V blocking capability, 15 A pulsed collector current, h_FE classification up to 240, safe operating area (SOA) derating behavior, and TO-220 mechanical compatibility with standard heatsinks.

Technical Context

The KSC2334OTU is a single NPN bipolar junction transistor optimized for high-current, high-voltage switching in industrial power electronics. Its design emphasizes ruggedness under inductive load conditions, evidenced by three sustained voltage ratings (V_CEO(sus), V_CEX(sus)1, V_CEX(sus)2) all specified at 100 V with defined base drive and clamping conditions.

It features a complementary pairing with KSA1010 (PNP), enabling push-pull or H-bridge configurations. The device operates with a maximum junction temperature of 150°C and exhibits graded h_FE bins (R/O/Y) supporting consistent gain matching across production lots for critical analog or linear-regulation applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - Maximum continuous collector-emitter voltage before breakdown; defines usable bus voltage headroom in DC-DC converters and motor drives.
I_C (DC)	7 A - Sustained collector current at T_C = 25°C; determines thermal design margin when mounted on heatsink.
P_C (T_C = 25°C)	40 W - Maximum power dissipation at case temperature 25°C; sets upper limit for conduction loss handling without forced cooling.
V_CE(sat)	0.6 V @ I_C = 5 A, I_B = 0.5 A - Low saturation voltage reduces conduction losses and self-heating during on-state operation.
t_F	1.5 µs - Fall time under specified R_L = 10 Ω, V_CC = 50 V; constrains minimum achievable switching frequency in hard-switched topologies.
h_FE (I_C = 5 A)	20–240 - Gain range across Y-bin; enables precise base drive sizing for predictable switching thresholds and reduced gate driver burden.

Pinout & Package

Package: TO-220 (JEDEC variation AB), 3-lead through-hole, vertical mounting with metal tab electrically connected to collector. Requires insulated mounting hardware when collector is not at chassis ground.

Pin/Terminal	Circuit Role	Design Meaning
1 (Left)	Base	Current-controlled input terminal; requires ≥0.5 A DC base drive for full saturation at 5 A collector current.
2 (Center)	Collector	Main high-current output node; electrically tied to metal tab; must be isolated from heatsink unless system ground reference permits.
3 (Right)	Emitter	Low-side return path; connects to ground or low-side switch node; carries full load current and must be routed with low-inductance layout.

Key Features

Feature	Design Value
Rugged SOA with clamped inductive switching	Validated 100 V sustaining voltage under L = 180 µH, V_BE(off) = −5 V clamping - supports reliable operation in relay/snubberless inductive load switching.
Graded h_FE binning (R/O/Y)	Y-bin offers h_FE = 120–240 at I_C = 3 A - enables tighter base drive tolerance and improved consistency in production assemblies.
High pulsed current capability	I_CP = 15 A (PW ≤ 300 µs, duty ≤ 10%) - allows short-duration surge handling for motor startup or fault current limiting.
Industrial temperature range	T_J = −55°C to +150°C - ensures functional reliability in uncontrolled ambient environments such as factory automation enclosures.

Applications

Motor Drive Stage	SMPS Primary Switch
Use Scenario: Driving brushed DC motors in industrial actuators with PWM frequencies up to 20 kHz and peak currents ≤7 A. IC Role / Device Role / Timing Role: High-side or low-side NPN switch controlling motor winding current via base-driven saturation. Use Value: Low V_CE(sat) minimizes resistive heating during 100% duty cycle stall conditions; TO-220 package enables direct bolt-on heatsinking.	Use Scenario: Forward or push-pull converter primary-side switch operating from 48–80 V DC bus with 5–10 A peak transformer primary current. IC Role / Device Role / Timing Role: Main power switch turning on/off transformer energy transfer; driven by discrete base driver stage. Use Value: 100 V V_CEO provides 20% margin over 80 V max bus; SOA rating supports safe turn-off under leakage inductance spikes.
Inductive Load Interface	Solenoid/Valve Driver
Use Scenario: Controlling 24 V/48 V solenoid valves or contactors with inductive energy recovery requirements. IC Role / Device Role / Timing Role: Low-side switch sinking inductive load current; paired with external flyback diode or active clamp. Use Value: Verified V_CEX(sus) = 100 V under clamped inductive turn-off ensures no secondary breakdown during fast de-energization.	Use Scenario: Driving high-current pneumatic/hydraulic valve coils requiring >3 A steady-state current and fast response. IC Role / Device Role / Timing Role: Direct-current switch replacing mechanical relays; base driven by microcontroller GPIO via buffer. Use Value: h_FE ≥ 40 at I_C = 0.5 A enables simple resistor-based base drive from 5 V logic; TO-220 footprint simplifies board-level replacement.

Motor Drive Stage

SMPS Primary Switch

Use Scenario: Driving brushed DC motors in industrial actuators with PWM frequencies up to 20 kHz and peak currents ≤7 A.

IC Role / Device Role / Timing Role: High-side or low-side NPN switch controlling motor winding current via base-driven saturation.

Use Value: Low V_CE(sat) minimizes resistive heating during 100% duty cycle stall conditions; TO-220 package enables direct bolt-on heatsinking.

Use Scenario: Forward or push-pull converter primary-side switch operating from 48–80 V DC bus with 5–10 A peak transformer primary current.

IC Role / Device Role / Timing Role: Main power switch turning on/off transformer energy transfer; driven by discrete base driver stage.

Use Value: 100 V V_CEO provides 20% margin over 80 V max bus; SOA rating supports safe turn-off under leakage inductance spikes.

Inductive Load Interface

Solenoid/Valve Driver

Use Scenario: Controlling 24 V/48 V solenoid valves or contactors with inductive energy recovery requirements.

IC Role / Device Role / Timing Role: Low-side switch sinking inductive load current; paired with external flyback diode or active clamp.

Use Value: Verified V_CEX(sus) = 100 V under clamped inductive turn-off ensures no secondary breakdown during fast de-energization.

Use Scenario: Driving high-current pneumatic/hydraulic valve coils requiring >3 A steady-state current and fast response.

IC Role / Device Role / Timing Role: Direct-current switch replacing mechanical relays; base driven by microcontroller GPIO via buffer.

Use Value: h_FE ≥ 40 at I_C = 0.5 A enables simple resistor-based base drive from 5 V logic; TO-220 footprint simplifies board-level replacement.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD122G	V_CEO = 100 V, I_C = 8 A, P_C = 30 W, TO-252 (DPAK); lower power dissipation, surface-mount only	Not suitable for same heatsink interface; requires PCB copper area instead of mechanical heatsink	Select when space-constrained PCB layout prioritizes SMT assembly over thermal performance.
2SD1047	V_CEO = 140 V, I_C = 12 A, P_C = 100 W, TO-3P; higher voltage/current, larger package, higher cost	Over-specified for 100 V/7 A use cases; requires larger heatsink and mounting hardware	Select only when extended SOA or 140 V bus margin is required beyond KSC2334OTU's validated 100 V rating.

Compared with MJD122G and 2SD1047, the KSC2334OTU offers optimal balance of TO-220 mountability, 100 V/7 A rating, and 40 W dissipation-making it ideal for cost-sensitive industrial switching where mechanical heatsinking is available but board space is not severely constrained.

Availability

KSC2334OTU is available at Aetrix Electronics and suitable for industrial motor drives, switch-mode power supplies, and solenoid control systems requiring stable component supply and long-term manufacturability.

Supply support for KSC2334OTU 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

ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The KSC2334OTU belongs to ON Semiconductor's legacy Fairchild power transistor portfolio, designed specifically for ruggedized industrial switching applications demanding high-current gain consistency and proven inductive load robustness.

FAQ

What is the pin configuration of the KSC2334OTU?

The KSC2334OTU uses a standard TO-220 package with 3 leads: Pin 1 is Base, Pin 2 is Collector (connected to the metal tab), and Pin 3 is Emitter. This configuration is confirmed in the official ON Semiconductor datasheet Rev. A1 and matches JEDEC TO-220 variation AB mechanical drawings. Always verify tab isolation requirements before heatsink mounting.

Does the KSC2334OTU have a built-in flyback diode?

No, the KSC2334OTU is a discrete NPN bipolar transistor without any integrated protection diodes. External flyback or clamping diodes must be used when driving inductive loads. Its V_CEX(sus) rating is validated only when used with proper external clamping circuitry per the test conditions in the datasheet.

What is the maximum allowable base current for continuous operation of the KSC2334OTU?

The KSC2334OTU specifies I_B = 3.5 A as the maximum DC base current. Exceeding this value risks metallization failure or bond wire degradation. For 5 A collector current, typical design uses I_B = 0.5 A (h_FE ≥ 10), well within safe limits. Always refer to the Safe Operating Area curves for pulsed base drive validation.

Is the KSC2334OTU RoHS compliant and lead-free?

Yes, the KSC2334OTU is RoHS compliant and lead-free, consistent with ON Semiconductor's corporate compliance policy. The device meets EU RoHS Directive 2011/65/EU and subsequent amendments. Full material declarations and compliance certificates are available upon request from Aetrix Electronics or directly via ON Semiconductor's product change notifications.

Can the KSC2334OTU replace the original Fairchild KSC2334 in existing designs?

Yes, the KSC2334OTU is the ON Semiconductor–branded successor to the Fairchild KSC2334, with identical electrical specifications, pinout, package, and thermal characteristics. The "OTU" suffix denotes updated packaging and traceability per ON Semiconductor's post-integration nomenclature standards; no redesign or requalification is required for drop-in replacement.

KSC2334OTU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: NPN

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

Voltage - Collector Emitter Breakdown (Max):: 100 V

Vce Saturation (Max) @ Ib, Ic:: 600mV @ 500mA, 5A

Current - Collector Cutoff (Max):: 10µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 70 @ 3A, 5V

Power - Max:: 1.5 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220-3

KSC2334OTU FAQ

1.How can I place an order for KSC2334OTU through Aetrix?

Please submit a Request for Quotation (RFQ) for KSC2334OTU 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 KSC2334OTU reliable?

The price and inventory of KSC2334OTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC2334OTU is usually 5 days.

3.What payment methods are accepted for KSC2334OTU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC2334OTU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSC2334OTU?

KSC2334OTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSC2334OTU 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 KSC2334OTU?

For technical support, including KSC2334OTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC2334OTU requirements.

6.How does Aetrix verify that KSC2334OTU is sourced from the original manufacturer or authorized distributors?

All KSC2334OTU 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 KSC2334OTU meets industry standards.

7.What is the process for return or replacement of KSC2334OTU?

All KSC2334OTU units undergo pre-shipment inspection (PSI). If there is an issue with KSC2334OTU, 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 KSC2334OTU part is unused and in its original packaging.

Return procedure for KSC2334OTU:

1.Submit a request within 90 days.

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

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