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onsemi KSH117TF
- Part No.:
- KSH117TF
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
KSH117TF.pdf
- Description:
- TRANS PNP DARL 100V 2A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:4,983
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Product details
Overview
KSH117TF from ON Semiconductor is a PNP 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 minimum hFE of 500 at IC = -0.5 A - used in high-gain linear and switching applications such as relay drivers and power regulators.
For engineers reviewing the KSH117TF datasheet, pinout, applications, or equivalent options, key selection criteria include its built-in emitter-collector damper diode, -4 V VBE(sat) at -4 A/-40 mA drive, -3 V VCE(sat) under pulse conditions, and thermal derating curve supporting operation up to 150°C junction temperature.
Technical Context
The KSH117TF implements a monolithic PNP Darlington pair with integrated base-emitter resistors (R1 ≈ 10 kΩ, R2 ≈ 0.6 kΩ) and an emitter-collector damper diode - enabling self-biased switching without external bias networks. Its Darlington configuration delivers high DC current gain while maintaining low saturation voltage under moderate load currents.
It operates as a high-voltage, medium-current power switch with safe operating area (SOA) defined up to 5 ms at -30 V, and exhibits fT = 25 MHz at VCE = -10 V and IC = -0.75 A - suitable for audio-frequency switching and DC control rather than RF or fast digital logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -100 V - supports high-side switching in industrial DC supplies up to 100 V rail. |
| IC (DC) | -2 A - enables direct driving of solenoids, small motors, or relays without external current boosting. |
| hFE (min) | 500 @ VCE = -3 V, IC = -0.5 A - reduces required base drive current by >10× vs. single transistors. |
| VCE(sat) | -3 V @ IC = -4 A, IB = -40 mA - limits conduction loss to ≤12 W at full pulse current. |
| PC (TC=25°C) | 20 W - requires heatsinking above ~5 W continuous dissipation in ambient air. |
| TJ(max) | 150 °C - sets maximum allowable junction temperature for reliability-limited operation. |
Pinout & Package
D-PAK (TO-252) surface-mount package with exposed drain pad (collector tab) for thermal enhancement; lead-formed for automated placement and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input node | Accepts low-current drive signal; internal R1/R2 network provides self-biasing and turn-off assist. |
| 2 (Collector) | High-current output sink | Connected to exposed metal tab - must be thermally coupled to PCB copper or heatsink. |
| 3 (Emitter) | Power return path | Internally tied to damper diode cathode; connects to system ground or negative rail. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in E-C damper diode | Clamps inductive kickback during relay/solenoid turn-off, eliminating need for external flyback diode. |
| Monolithic Darlington pair | Integrates driver and output transistor with matched characteristics and thermal coupling for stable gain. |
| Internal base bias resistors | R1 ≈ 10 kΩ and R2 ≈ 0.6 kΩ enable simple on/off control with single logic-level input. |
| D-PAK thermal performance | Low thermal resistance (RθJC ≈ 1.5°C/W typical) supports 20 W dissipation with minimal heatsink. |
Applications
| Relay Driver Circuit | Linear Regulator Pass Element |
|---|---|
Use Scenario: Driving 24–48 V DC electromagnetic relays with coil currents up to 1.5 A in PLC I/O modules. IC Role / Device Role / Timing Role: High-gain PNP Darlington switch sinking relay coil current to ground. Use Value: Eliminates external flyback diode and base resistor network, reducing BOM count and layout area. | Use Scenario: As series pass element in adjustable negative linear regulators delivering up to -2 A at -12 V to analog subsystems. IC Role / Device Role / Timing Role: Voltage-controlled current source regulating output via feedback to base. Use Value: High hFE minimizes base drive error current, improving load regulation accuracy. |
| Motor Speed Control | High-Voltage Lamp Dimmer |
Use Scenario: PWM-controlled 36 V brushed DC motor in industrial actuators with peak currents ≤ 4 A. IC Role / Device Role / Timing Role: Low-frequency (<10 kHz) power switch in half-bridge or high-side configuration. Use Value: Built-in damper diode absorbs back-EMF during PWM off-time, preventing voltage overshoot. | Use Scenario: Phase-angle dimming of 100 V AC incandescent lamps using TRIAC-triggered gate drive. IC Role / Device Role / Timing Role: Negative rail switch providing isolated trigger current to TRIAC gate. Use Value: -100 V VCEO rating ensures reliable blocking during AC zero-crossing intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP Darlington transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| FJD13009TF | Higher VCEO (-140 V), lower hFE (min 200), no integrated damper diode | Requires external flyback diode; better suited for higher-voltage flyback converters | Select when >100 V blocking is needed and board space allows external diode |
| MJD127G | Same D-PAK package, -100 V VCEO, but hFE min = 1000 and no integrated damper diode | Higher gain but lacks E-C clamp - needs discrete protection for inductive loads | Prefer when maximum current gain is critical and inductive energy is managed externally |
Compared with FJD13009TF and MJD127G, the KSH117TF uniquely integrates both base bias resistors and an emitter-collector damper diode - reducing component count and layout complexity in relay and solenoid driver designs where space and reliability are constrained.
Availability
KSH117TF is available at Aetrix Electronics and suitable for relay drivers, linear regulator pass elements, motor speed controllers, and high-voltage lamp dimmers requiring stable component supply across industrial automation, building controls, and power management systems.
Supply support for KSH117TF 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 (formerly Fairchild Semiconductor) is a global supplier of energy-efficient semiconductor components for automotive, industrial, cloud computing, and IoT applications.
The KSH117TF belongs to ON Semiconductor's legacy power bipolar transistor family, designed specifically for cost-sensitive, high-reliability industrial switching applications requiring integrated protection and simplified drive.
FAQ
What is the pin configuration of the KSH117TF?
The KSH117TF uses a 3-pin D-PAK (TO-252) package with pin 1 = Base, pin 2 = Collector (connected to exposed metal tab), and pin 3 = Emitter. The internal damper diode is oriented from emitter to collector, and base bias resistors are monolithically integrated - confirmed in the official ON Semiconductor datasheet Rev. A4.
Does the KSH117TF have a built-in damper diode?
Yes, the KSH117TF includes an integrated emitter-to-collector damper diode, explicitly documented in the "Features" section and equivalent circuit diagram of the ON Semiconductor datasheet. This diode clamps inductive voltage spikes during turn-off, eliminating the need for an external flyback diode in relay or solenoid applications.
What is the maximum continuous collector current for the KSH117TF?
The KSH117TF has a maximum DC collector current (IC) rating of -2 A at TC = 25°C, as specified in the Absolute Maximum Ratings table. Derating is required above 25°C case temperature per the Power Derating curve - at 100°C case, maximum continuous IC drops to approximately -1.2 A.
Can the KSH117TF replace the TIP117 in existing designs?
The KSH117TF is electrically similar to the TIP117 but differs in package (D-PAK vs. TO-220) and includes integrated base resistors and an E-C damper diode. It is not a drop-in replacement due to different pinout and thermal mounting - redesign of PCB layout and thermal interface is required for migration from TIP117 to KSH117TF.
What is the typical DC current gain (hFE) of the KSH117TF at -2 A collector current?
Per the Electrical Characteristics table, the KSH117TF guarantees hFE ≥ 200 at VCE = -3 V and IC = -4 A. At -2 A, the typical hFE falls between 500 (at -0.5 A) and 200 (at -4 A), with interpolation suggesting ~300–400 - actual value must be validated per application using the KSH117TF datasheet curves and customer test conditions.
KSH117TF 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:
- PNP - 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
KSH117TF FAQ
1.How can I place an order for KSH117TF through Aetrix?
Please submit a Request for Quotation (RFQ) for KSH117TF 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 KSH117TF reliable?
The price and inventory of KSH117TF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSH117TF is usually 5 days.
3.What payment methods are accepted for KSH117TF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSH117TF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSH117TF?
KSH117TF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSH117TF 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 KSH117TF?
For technical support, including KSH117TF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSH117TF requirements.
6.How does Aetrix verify that KSH117TF is sourced from the original manufacturer or authorized distributors?
All KSH117TF 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 KSH117TF meets industry standards.
7.What is the process for return or replacement of KSH117TF?
All KSH117TF units undergo pre-shipment inspection (PSI). If there is an issue with KSH117TF, 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 KSH117TF part is unused and in its original packaging.
Return procedure for KSH117TF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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