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onsemi KSH112TF
, SC-63.JPG)
- Part No.:
- KSH112TF
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
KSH112TF.pdf
- Description:
- TRANS NPN DARL 100V 2A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:4,734
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Product details
Overview
KSH112TF from ON Semiconductor is an NPN silicon Darlington transistor in D-PAK surface-mount package, rated for 100 V VCEO, 2 A DC collector current, and 20 W collector dissipation at TC = 25°C, with built-in emitter-collector damper diode and hFE ≥ 500 at IC = 0.5 A - used in high-gain switching applications such as relay drivers and motor controls.
For engineers reviewing the KSH112TF datasheet, pinout, applications, or equivalent options, key selection considerations include its integrated damper diode, high DC current gain (up to 12 k), low VCE(sat) of 2 V at IC = 2 A / IB = 8 mA, thermal derating curve, and D-PAK footprint compatibility with industrial power interface designs.
Technical Context
This Darlington pair integrates two NPN transistors with on-chip base-emitter resistors (R1 ≈ 10 kΩ, R2 ≈ 0.6 kΩ) and a monolithic damper diode across emitter-collector. It operates with VBE(on) = 2.8 V at IC = 2 A and delivers fT = 25 MHz at VCE = 10 V / IC = 0.75 A.
The device supports pulse operation up to 4 A (ICP) with 2% duty cycle, exhibits Cob = 100 pF at VCB = 10 V, and maintains safe operating area compliance up to 100 V / 2 A under DC conditions per Figure 6.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 100 V - maximum continuous collector-emitter voltage before breakdown; enables use in 48–72 V industrial control rails. |
| IC (DC) | 2 A - steady-state load current handling; sufficient for solenoid/relay coil drive without external heat sinking below 75°C case temp. |
| hFE | 500–12,000 - high DC current gain reduces required base drive; allows direct microcontroller GPIO sourcing (≥8 mA) for full saturation. |
| VCE(sat) | 2 V @ IC=2 A/IB=8 mA - low saturation voltage minimizes conduction loss (4 W max at 2 A), improving thermal efficiency. |
| PC (TC=25°C) | 20 W - power dissipation capability at heatsink-mounted condition; derates linearly to zero at TC = 175°C per Figure 7. |
| Cob | 100 pF @ VCB=10 V - output capacitance affects switching speed; limits turn-off time in inductive load circuits. |
| fT | 25 MHz @ VCE=10 V/IC=0.75 A - usable bandwidth for moderate-speed switching (e.g., <100 kHz PWM). |
Pinout & Package
D-PAK (TO-252) surface-mount package with exposed drain pad for thermal conduction; 3-terminal configuration optimized for PCB layout with minimal trace inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input node | Receives base current to saturate Darlington pair; internal R1/R2 bias network enables single-resistor drive. |
| 2 (Collector) | High-side power switch terminal | Connected to load supply rail; internally tied to damper diode cathode for inductive kickback clamping. |
| 3 (Emitter) | Power return path | Common emitter node; internally connected to damper diode anode; must be routed to low-inductance ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated damper diode | Monolithic E-C diode eliminates need for external flyback diode in relay/solenoid drivers, reducing BOM count and board space. |
| High hFE (≥500) | Enables direct drive from 3.3 V/5 V logic outputs without additional pre-driver stage, simplifying gate control circuitry. |
| D-PAK thermal performance | 20 W dissipation at TC = 25°C with copper pour; achieves lower junction-to-case resistance than TO-220 equivalents in same footprint. |
| Low VCE(sat) | 2 V at rated 2 A load ensures <4 W conduction loss, easing thermal design for sealed enclosures or ambient >60°C environments. |
Applications
| Relay Driver Module | DC Motor Speed Control |
|---|---|
Use Scenario: Driving 24–48 V electromagnetic relays in PLC I/O modules with microcontroller GPIO control. IC Role / Device Role / Timing Role: High-current NPN Darlington switch providing galvanically isolated load switching via optocoupler-coupled base drive. Use Value: Integrated damper diode suppresses inductive voltage spikes up to 100 V, eliminating external diode and reducing PCB area by 12 mm². | Use Scenario: Low-frequency PWM control of brushed 24 V DC motors in HVAC actuators and industrial valves. IC Role / Device Role / Timing Role: Power stage switch in half-bridge or high-side configuration, handling peak currents up to 4 A during stall conditions. Use Value: 20 W thermal rating with D-PAK package allows sustained 2 A operation without forced air, supporting fanless enclosure designs. |
| Solenoid Actuator Interface | Industrial Lamp Dimmer |
Use Scenario: Controlling 12–48 V solenoid valves in fluid control systems with TTL-compatible enable signals. IC Role / Device Role / Timing Role: Single-transistor load switch activated by programmable logic controller (PLC) output cards. Use Value: hFE ≥ 500 ensures full saturation with ≤10 mA base current, compatible with standard 24 V PLC open-collector outputs. | Use Scenario: Phase-angle dimming of incandescent lamps in building automation panels using triac-triggered AC phase control. IC Role / Device Role / Timing Role: DC-coupled driver for optotriac LED, translating low-voltage logic edges into precise zero-crossing timing pulses. Use Value: VCEO = 100 V withstands transient surges on 120 VAC lines, enabling direct interface without level-shifting isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Darlington transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| FJD13009 | Higher VCEO (400 V), lower hFE (20–100), no integrated damper diode | Requires external flyback diode; suited for higher-voltage flyback converters, not relay drivers | Select when >100 V blocking is needed and damper diode can be added externally |
| MJD122 | Same D-PAK package, VCEO = 100 V, hFE = 1000–8000, no damper diode, higher VCE(sat) (3 V @ 2 A) | Lacks integrated clamp; requires discrete diode; slightly higher conduction loss | Choose if existing design uses MJD122 and damper diode is already present on board |
Compared with FJD13009 and MJD122, the KSH112TF uniquely combines 100 V rating, ≥500 hFE, and monolithic damper diode in D-PAK - reducing component count and layout complexity specifically for 24–48 V inductive load switching where surge suppression and logic-level drive are critical.
Availability
KSH112TF is available at Aetrix Electronics and suitable for relay driver modules, DC motor controllers, solenoid actuator interfaces, and industrial lamp dimmers requiring stable component supply and long-term industrial lifecycle support.
Supply support for KSH112TF 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 management, analog, sensor, and logic solutions for automotive, industrial, cloud, and consumer markets.
The KSH112TF belongs to ON Semiconductor's legacy Fairchild power transistor portfolio, designed specifically for high-gain, medium-power switching in industrial control and electromechanical interface applications.
FAQ
What is the pin configuration of the KSH112TF?
The KSH112TF uses a 3-pin D-PAK (TO-252) package with pin 1 = Base, pin 2 = Collector, pin 3 = Emitter. The exposed metal tab is electrically connected to the Collector, serving as both thermal path and high-side power terminal. This configuration matches standard D-PAK layout guidelines for PCB thermal relief and current routing.
Does the KSH112TF include a built-in damper diode?
Yes, the KSH112TF integrates a monolithic damper diode between emitter and collector. This diode provides inherent flyback voltage clamping for inductive loads, eliminating the need for an external diode in relay, solenoid, or motor coil applications - a key differentiator from standard NPN transistors like the MJD122.
What is the maximum continuous collector current for the KSH112TF?
The KSH112TF supports 2 A of continuous DC collector current (IC) at TC = 25°C. At elevated case temperatures, current must be reduced per the derating curve in Figure 7 - e.g., 1.2 A maximum at TC = 100°C - to maintain junction temperature below 150°C.
Can the KSH112TF be driven directly from a 3.3 V microcontroller GPIO?
Yes, the KSH112TF can be driven directly from a 3.3 V microcontroller GPIO when paired with a series base resistor (e.g., 330 Ω) to deliver ≥8 mA base current. Its high hFE (≥500) ensures full saturation at IC = 2 A, making it compatible with low-voltage logic without external pre-driver stages.
How does the KSH112TF differ from the TIP112?
The KSH112TF is electrically similar to the through-hole TIP112 but packaged in surface-mount D-PAK format. Both share identical electrical specs (VCEO = 100 V, IC = 2 A, hFE ≥ 500), but the KSH112TF offers superior thermal performance in automated assembly and eliminates lead-forming steps - enabling higher-density industrial PCB layouts.
KSH112TF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- NPN - Darlington
- Current - Collector (Ic) (Max):
- 2 A
- Voltage - Collector Emitter Breakdown (Max):
- 100 V
- Vce Saturation (Max) @ Ib, Ic:
- 3V @ 40mA, 4A
- Current - Collector Cutoff (Max):
- 20µA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 1000 @ 2A, 3V
- Power - Max:
- 1.75 W
- Frequency - Transition:
- 25MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
KSH112TF FAQ
1.How can I place an order for KSH112TF through Aetrix?
Please submit a Request for Quotation (RFQ) for KSH112TF 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 KSH112TF reliable?
The price and inventory of KSH112TF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSH112TF is usually 5 days.
3.What payment methods are accepted for KSH112TF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSH112TF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSH112TF?
KSH112TF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSH112TF 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 KSH112TF?
For technical support, including KSH112TF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSH112TF requirements.
6.How does Aetrix verify that KSH112TF is sourced from the original manufacturer or authorized distributors?
All KSH112TF 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 KSH112TF meets industry standards.
7.What is the process for return or replacement of KSH112TF?
All KSH112TF units undergo pre-shipment inspection (PSI). If there is an issue with KSH112TF, 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 KSH112TF part is unused and in its original packaging.
Return procedure for KSH112TF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
KSH112TF Tags
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