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onsemi KSD1692YS
- Part No.:
- KSD1692YS
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-225AA, TO-126-3
- Datasheet:
-
KSD1692YS.pdf
- Description:
- TRANS NPN DARL 100V 3A TO-126-3
- Quantity:
- Payment:
- Shipping:
Inventory:152
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Product details
Overview
KSD1692YS from ON Semiconductor is an NPN silicon Darlington transistor in TO-126 package, rated for 100 V VCEO, 3 A DC collector current, and 15 W collector dissipation at TC = 25°C, with built-in emitter-collector damper diode; used in high-gain, medium-power switching applications such as relay drivers and lamp controls.
For engineers reviewing the KSD1692YS datasheet, pinout, applications, or equivalent options, key selection criteria include verified hFE classification (Y-grade: 4000–12000 at IC = 1.5 A), low VCE(sat) (0.9–1.2 V), integrated damper diode, thermal derating behavior, and TO-126 mechanical compatibility.
Technical Context
The KSD1692YS implements a two-stage NPN Darlington configuration delivering high DC current gain while maintaining single-package integration. It features a monolithic damper diode connected between emitter and collector to suppress inductive kickback during switch-off.
Its safe operating area (SOA) is defined by both dissipation-limited and second-breakdown-limited boundaries, with pulse operation supported up to 5 A (PW ≤ 10 ms, duty cycle ≤ 50%). Thermal performance is characterized by junction-to-case resistance and power derating above 25°C case temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 100 V - Maximum continuous collector-emitter voltage before breakdown; defines maximum load supply voltage in switching circuits. |
| IC (DC) | 3 A - Sustained collector current capability; sets upper bound for steady-state load drive without forced cooling. |
| hFE (Y-class) | 4000–12000 - Confirmed DC current gain range at VCE = 2 V, IC = 1.5 A; enables microampere-level base drive for ampere-level loads. |
| VCE(sat) | 0.9–1.2 V - Saturation voltage at IC = 1.5 A, IB = 1.5 mA; directly determines conduction loss and heat generation in on-state. |
| PC (TC = 25°C) | 15 W - Maximum power dissipation with case held at 25°C; requires heatsinking for sustained operation above ~1.5 W ambient. |
| Integrated Diode | Emitter-to-collector damper - Eliminates need for external flyback diode in inductive load switching (e.g., solenoids, relays). |
Pinout & Package
Package: TO-126 - Three-lead, through-hole plastic power package with metal tab for heatsink mounting; lead spacing matches JEDEC TO-126 standard; tab is electrically connected to collector.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal of Darlington pair | Reference node for base drive; polarity defines NPN operation; connects to load return path. |
| 2 (Collector) | Collector terminal of Darlington pair + diode anode | High-current output node; electrically tied to metal tab; must be isolated from heatsink unless grounded. |
| 3 (Base) | Input control terminal | Drives first transistor's base; high hFE reduces required base current but increases turn-on/turn-off time. |
Key Features
| Feature | Design Value |
|---|---|
| High DC current gain (hFE) | Y-class bin guarantees 4000–12000 at 1.5 A, enabling low-power MCU GPIO direct drive without external pre-driver. |
| Low VCE(sat) | 0.9–1.2 V at 1.5 A ensures <1.8 W conduction loss, reducing thermal burden in compact designs. |
| Monolithic damper diode | Integrated E-C diode eliminates discrete component count and layout risk in relay/solenoid driver PCBs. |
| TO-126 power package | Standardized footprint supports manual or automated through-hole assembly; metal tab enables direct heatsink attachment with thermal interface material. |
Applications
| Relay Driver Circuits | Lamp and LED Array Control |
|---|---|
Use Scenario: Driving 12 V/24 V electromagnetic relays in industrial PLC output modules. IC Role / Device Role / Timing Role: High-gain switch amplifying microcontroller GPIO signals to energize relay coils with inductive energy storage. Use Value: Integrated damper diode prevents voltage spikes >100 V during coil de-energization, eliminating external snubber components and board space. | Use Scenario: Controlling multi-segment automotive interior lamps or signage LED strings. IC Role / Device Role / Timing Role: Medium-current constant-current switch regulating LED string current via PWM-compatible base drive. Use Value: Low VCE(sat) minimizes power loss at 2–3 A, allowing operation without active cooling in sealed enclosures. |
| Motor Start Assist Circuits | Power Supply Sequencing Switches |
Use Scenario: Providing momentary high-current surge to starter windings in small AC induction motors. IC Role / Device Role / Timing Role: Pulse-rated Darlington delivering 5 A peak (10 ms) to overcome motor locked-rotor impedance. Use Value: Verified pulse SOA supports short-duration overload without secondary breakdown, extending reliability over discrete BJT alternatives. | Use Scenario: Enabling controlled power-up sequencing of auxiliary rails in multi-rail industrial power supplies. IC Role / Device Role / Timing Role: Soft-start switch isolating downstream circuitry until main rail reaches regulation. Use Value: High hFE allows precise base current limiting to control dV/dt of output ramp, preventing inrush-induced brownouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Darlington transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BD679A | VCEO = 80 V, hFE = 750–4000 (no Y-class binning), no integrated diode | Requires external flyback diode; lower voltage rating limits use in 100 V bus systems | Select when cost sensitivity outweighs design simplification and higher voltage margin is unnecessary. |
| MJD122G | VCEO = 100 V, IC = 3 A, hFE = 1000–4000, no integrated diode, TO-220 package | Larger footprint; no internal damper; requires PCB real estate for external diode and routing | Choose when TO-220 heatsinking is preferred and board layout accommodates discrete protection components. |
Compared with BD679A and MJD122G, the KSD1692YS provides guaranteed high hFE binning, integrated E-C diode, and TO-126 form factor-reducing BOM count, layout complexity, and qualification effort for medium-power inductive switching where 100 V rating and thermal efficiency are critical.
Availability
KSD1692YS is available at Aetrix Electronics and suitable for relay drivers, lamp controls, motor assist circuits, and power supply sequencing requiring stable component supply across industrial and automotive aftermarket programs.
Supply support for KSD1692YS 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 logic solutions for automotive, industrial, cloud, and consumer markets.
The KSD1692YS belongs to ON Semiconductor's legacy Fairchild power transistor product line, designed specifically for robust, cost-effective medium-power switching in industrial control and appliance applications.
FAQ
What is the confirmed hFE range for KSD1692YS?
The KSD1692YS is binned to Y-class specification, guaranteeing a DC current gain (hFE) of 4000–12000 when measured at VCE = 2 V and IC = 1.5 A. This binning is documented in the official ON Semiconductor datasheet Rev. A (February 2000) and remains valid for all KSD1692YS units supplied under current ON Semiconductor part numbering conventions.
Does KSD1692YS include an integrated damper diode, and how is it connected?
Yes, the KSD1692YS integrates a damper diode monolithically between emitter and collector terminals. The diode anode is connected to the collector (Pin 2), and the cathode is connected to the emitter (Pin 1). This configuration clamps inductive flyback voltage during switch-off, protecting the transistor without requiring external components.
What is the maximum allowable case temperature for continuous operation of KSD1692YS?
The KSD1692YS has a maximum junction temperature (TJ) of 150°C and a storage temperature range of −55°C to +150°C. For continuous DC operation, the case temperature must be maintained at or below 25°C to sustain full 15 W collector dissipation; above that, linear derating applies per the published derating curve (150 mW/°C reduction beyond 25°C).
Is KSD1692YS pin-compatible with other TO-126 Darlington transistors like BD679 or MJD122?
No, KSD1692YS is not pin-compatible with BD679 or MJD122. While all three use TO-126 or TO-220 packages, their pin assignments differ: KSD1692YS uses E-C-B (Emitter–Collector–Base), whereas BD679 uses C-B-E and MJD122 uses E-B-C in TO-220. Physical fit does not imply functional or electrical compatibility.
Can KSD1692YS be used in PWM-driven inductive loads?
Yes, the KSD1692YS supports PWM operation in inductive load applications due to its specified turn-on time (0.5 µs), storage time (2 µs), and fall time (1 µs) under defined test conditions (VCC = 40 V, IC = 1.5 A, RL = 27 Ω). Its integrated damper diode ensures reliable flyback handling across typical PWM frequencies up to 20 kHz.
KSD1692YS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-225AA, TO-126-3
- Packaging:
- Bulk
- Product Status:
- Active
- Transistor Type:
- NPN - Darlington
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 100 V
- Vce Saturation (Max) @ Ib, Ic:
- 1.2V @ 1.5mA, 1.5A
- Current - Collector Cutoff (Max):
- 10µA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 4000 @ 1.5A, 2V
- Power - Max:
- 1.3 W
- Frequency - Transition:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-126-3
KSD1692YS FAQ
1.How can I place an order for KSD1692YS through Aetrix?
Please submit a Request for Quotation (RFQ) for KSD1692YS 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 KSD1692YS reliable?
The price and inventory of KSD1692YS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSD1692YS is usually 5 days.
3.What payment methods are accepted for KSD1692YS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSD1692YS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSD1692YS?
KSD1692YS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSD1692YS 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 KSD1692YS?
For technical support, including KSD1692YS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSD1692YS requirements.
6.How does Aetrix verify that KSD1692YS is sourced from the original manufacturer or authorized distributors?
All KSD1692YS 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 KSD1692YS meets industry standards.
7.What is the process for return or replacement of KSD1692YS?
All KSD1692YS units undergo pre-shipment inspection (PSI). If there is an issue with KSD1692YS, 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 KSD1692YS part is unused and in its original packaging.
Return procedure for KSD1692YS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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