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onsemi KSC2334RTU
- Part No.:
- KSC2334RTU
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3
- Datasheet:
-
KSC2334RTU.pdf
- Description:
- TRANS NPN 100V 7A TO-220-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,685
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Product details
Overview
KSC2334RTU from ON Semiconductor is an NPN epitaxial silicon power transistor in TO-220 package, rated for 100 V VCEO, 7 A DC collector current, and 40 W collector dissipation at TC = 25°C. It delivers high-speed switching (tON/tF = 0.5/1.5 µs) with low saturation voltages (VCE(sat) = 0.6 V @ 5 A/0.5 A), suited for industrial motor control and SMPS primary-side switching.
For engineers reviewing the KSC2334RTU datasheet, pinout, applications, or equivalent options, key selection criteria include safe operating area robustness, pulse current capability (15 A), hFE classification (R/O/Y variants), VCEX(sus) clamped ratings, and thermal derating behavior above 25°C case temperature.
Technical Context
The KSC2334RTU is a ruggedized NPN bipolar junction transistor optimized for high-current, high-voltage industrial switching. Its design emphasizes fast turn-on/turn-off (tON = 0.5 µs, tF = 1.5 µs) and sustained avalanche energy handling under inductive load conditions (VCEX(sus) = 100 V with clamping).
It features three hFE gain classifications (R: 40–80, O: 70–140, Y: 120–240 at IC = 3 A), enabling precise current drive matching in base-controlled topologies. The device operates up to 150°C junction temperature and supports pulsed collector currents up to 15 A with ≤10% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 100 V - Maximum continuous collector-emitter voltage before breakdown; defines upper limit for SMPS flyback or motor drive bus voltage. |
| IC (DC) | 7 A - Sustained collector current capability at TC = 25°C; determines steady-state power stage sizing. |
| PC (TC=25°C) | 40 W - Thermal power limit at case temperature 25°C; requires heatsink design per derating curve. |
| VCE(sat) | 0.6 V @ 5 A/0.5 A - Low saturation voltage reduces conduction loss and heat generation in linear or saturated switching. |
| tF | 1.5 µs - Fall time under specified RL/IB conditions; critical for minimizing switching losses in 20–100 kHz power converters. |
| hFE (IC=3 A) | 40–240 (R/O/Y) - Gain spread enables tailored base drive design across production lots and thermal conditions. |
| TJ max | 150°C - Maximum allowable junction temperature; sets thermal margin for reliability in enclosed industrial enclosures. |
Pinout & Package
Package: TO-220 (JEDEC variation AB), through-hole, single-gauge leadframe, with metal tab electrically connected to collector. Mounting requires insulating washer if heatsink is grounded.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input | Receives base current to saturate or cut off transistor; requires current-limiting resistor in most driver circuits. |
| 2 (Collector) | High-side power path | Connected to load or supply rail; tab is collector - must be isolated from chassis unless circuit topology permits. |
| 3 (Emitter) | Current return path | Common reference node for base drive and load return; often tied to ground or low-side switch source. |
Key Features
| Feature | Design Value |
|---|---|
| Clamped VCEX(sus) | 100 V under inductive switching with active base clamping - enables reliable operation without external snubbers in relay/motor drivers. |
| Pulsed ICP | 15 A peak for ≤300 µs pulses - supports short-circuit tolerance and startup surge handling in power supplies. |
| Low VBE(sat) | 1.5 V @ 5 A/0.5 A - reduces base drive power and allows simpler BJT driver IC selection. |
| SOA compliance | Rated for second breakdown in forward-biased safe operating area - validated up to 100 V × 5 A with 10 ms pulse width. |
| Complementary pairing | Designed as NPN counterpart to KSA1010 PNP - enables matched push-pull output stages in audio and servo amplifiers. |
Applications
| Industrial Motor Control | Switch-Mode Power Supply |
|---|---|
Use Scenario: Driving 24–48 V DC brushed motors in factory automation actuators with PWM frequencies up to 20 kHz. IC Role / Device Role / Timing Role: High-current NPN switch controlling motor phase current; operated in saturation for minimal conduction loss. Use Value: 0.6 V VCE(sat) limits I²R loss to <1.5 W at 5 A, reducing heatsink requirements versus higher-Vsat alternatives. | Use Scenario: Primary-side switching transistor in 100–300 W offline flyback or forward converters. IC Role / Device Role / Timing Role: Main power switch handling 100 V bus and 5–7 A peak drain current during switching cycles. Use Value: Clamped 100 V VCEX(sus) rating eliminates need for external RCD clamp in many designs, simplifying layout and BOM. |
| Relay & Solenoid Drivers | DC-DC Converter Output Stage |
Use Scenario: Solid-state replacement for mechanical relays controlling HVAC dampers or pneumatic valves. IC Role / Device Role / Timing Role: Inductive load switch with integrated base drive interface; handles 100 V inductive kickback. Use Value: 150°C TJ max and 100 V clamped sustaining voltage ensure reliability over 10⁵+ cycles in thermally constrained enclosures. | Use Scenario: High-current output stage in 12 V → 5 V/3.3 V step-down converters for industrial PLC I/O modules. IC Role / Device Role / Timing Role: Saturated switch in linear or quasi-resonant topology delivering up to 7 A DC output. Use Value: hFE classification (Y variant: 120–240) enables stable base drive across temperature, reducing gate driver complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD127G | VCEO = 100 V, IC = 8 A, but TO-263 surface-mount package; no metal tab - requires PCB copper area for thermal management. | Suitable for automated SMT assembly; less suitable for retrofit or high-reliability through-hole systems. | Select when board space and reflow compatibility outweigh mechanical robustness and field-serviceability needs. |
| BU508AF | VCEO = 1500 V, IC = 8 A, but slower (tF = 1.5 µs vs. 1.5 µs, but tON = 1.0 µs); higher VCE(sat) = 1.2 V - greater conduction loss. | Targeted at CRT flyback and high-voltage AC-DC - over-specified for 100 V industrial use. | Choose only if system requires >1000 V blocking; otherwise KSC2334RTU offers better efficiency and cost in ≤100 V applications. |
Compared with MJD127G and BU508AF, the KSC2334RTU provides optimal balance of 100 V rating, 7 A DC current, low VCE(sat), and TO-220 mechanical serviceability - making it preferred for repairable, medium-power industrial switching where thermal margin and ease of mounting matter.
Availability
KSC2334RTU is available at Aetrix Electronics and suitable for industrial motor control, switch-mode power supply design, and relay/solenoid driver applications requiring stable component supply and long-term manufacturability.
Supply support for KSC2334RTU 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 power management, analog, sensor, and discrete solutions for automotive, industrial, and cloud power markets.
The KSC2334RTU belongs to ON Semiconductor's legacy Fairchild power transistor portfolio, engineered specifically for ruggedized industrial switching where reliability under repetitive inductive stress and thermal cycling is essential.
FAQ
What is the maximum continuous collector current rating for KSC2334RTU?
The KSC2334RTU has a maximum DC collector current (IC) rating of 7 A at case temperature TC = 25°C. This rating decreases with rising case temperature per the published derating curve - at TC = 100°C, the usable IC drops to approximately 2.5 A. Always verify thermal design using the 40 W PC limit and SOA graph in the official KSC2334RTU datasheet.
Does KSC2334RTU have a built-in base-emitter resistor?
No, the KSC2334RTU is a standard three-terminal NPN bipolar transistor with no internal base-emitter resistor. It requires external base drive circuitry - typically a current-limiting resistor or dedicated BJT driver - to establish proper biasing and avoid thermal runaway. This distinguishes it from digital transistors (e.g., EMH series) that integrate resistors.
Is KSC2334RTU pin-compatible with other TO-220 NPN transistors like MJE13009?
KSC2334RTU uses standard TO-220 pinout (1=Base, 2=Collector, 3=Emitter), matching MJE13009 and most industry-standard TO-220 NPN devices. However, electrical parameters differ significantly - MJE13009 has higher VCEO (400 V) but lower hFE and slower switching. Pinout compatibility does not imply functional or thermal drop-in replacement.
What is the safe operating area (SOA) limitation for KSC2334RTU at 100 V?
At VCE = 100 V, the KSC2334RTU's forward-biased SOA limits continuous DC current to ~0.4 A, but supports up to 5 A for pulse widths ≤10 ms (with appropriate duty cycle). The device's second-breakdown rating is validated per Figure 4 in the datasheet, and clamped VCEX(sus) ensures robustness during inductive turn-off transients.
Can KSC2334RTU be used in linear amplifier applications?
The KSC2334RTU is optimized for switching, not linear operation. Its SOA restricts safe linear use - at VCE = 20 V, maximum continuous IC is ~2 A, and power dissipation must stay within 40 W derated by case temperature. For audio or precision linear amplification, purpose-built linear transistors (e.g., MJ15003) with wider SOA are recommended over the KSC2334RTU.
KSC2334RTU 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:
- 40 @ 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
KSC2334RTU FAQ
1.How can I place an order for KSC2334RTU through Aetrix?
Please submit a Request for Quotation (RFQ) for KSC2334RTU 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 KSC2334RTU reliable?
The price and inventory of KSC2334RTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSC2334RTU is usually 5 days.
3.What payment methods are accepted for KSC2334RTU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSC2334RTU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSC2334RTU?
KSC2334RTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSC2334RTU 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 KSC2334RTU?
For technical support, including KSC2334RTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSC2334RTU requirements.
6.How does Aetrix verify that KSC2334RTU is sourced from the original manufacturer or authorized distributors?
All KSC2334RTU 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 KSC2334RTU meets industry standards.
7.What is the process for return or replacement of KSC2334RTU?
All KSC2334RTU units undergo pre-shipment inspection (PSI). If there is an issue with KSC2334RTU, 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 KSC2334RTU part is unused and in its original packaging.
Return procedure for KSC2334RTU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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