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onsemi KSA1614YTU
- Part No.:
- KSA1614YTU
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3 Full Pack
- Datasheet:
-
KSA1614YTU.pdf
- Description:
- TRANS PNP 55V 3A TO-220F-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,943
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Product details
Overview
KSA1614YTU from ON Semiconductor (formerly Fairchild) is a PNP epitaxial silicon power transistor designed for low-frequency amplifier and power regulator applications, with -80 V collector-base voltage, -55 V collector-emitter voltage, -3 A continuous collector current, 20 W collector dissipation at TC=25°C, and hFE range of 120–240 (Y-class). It operates in linear or switching mode in high-current DC/AC output stages.
For engineers reviewing the KSA1614YTU datasheet, pinout, applications, or equivalent options, key selection criteria include safe operating area (SOA) compliance at elevated case temperatures, VCE(sat) performance under IC = -1 A / IB = -0.1 A, hFE classification consistency, and TO-220F package thermal interface suitability for heatsink-mounted power regulation.
Technical Context
This PNP bipolar junction transistor features epitaxial base construction for stable gain and rugged SOA performance. Its breakdown ratings (BVCBO = -80 V, BVCEO = -55 V) support use in medium-voltage DC power supplies and audio output stages where reverse-polarity rail handling is required.
The device exhibits low saturation voltage (VCE(sat) = -0.15 to -0.5 V at IC = -1 A, IB = -0.1 A) and moderate leakage (ICBO ≤ -50 µA at VCB = -50 V), enabling efficient switching and analog amplification in thermally constrained designs using the TO-220F insulated package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | -80 V - Maximum reverse voltage sustainable between collector and base before avalanche breakdown; defines upper limit for voltage swing in common-base configurations. |
| VCEO | -55 V - Maximum reverse voltage across collector-emitter with base open; sets safe operating ceiling in common-emitter amplifier or switch topologies. |
| IC (cont.) | -3 A - Continuous DC collector current rating; determines maximum load-handling capability in linear regulators or push-pull output stages. |
| PC (TC=25°C) | 20 W - Maximum power dissipation at case temperature of 25°C; requires heatsinking for sustained operation above ambient. |
| hFE (Y-class) | 120–240 - DC current gain range at VCE = -5 V, IC = -0.5 A; ensures predictable base drive requirements in bias networks. |
| VCE(sat) | -0.15 to -0.5 V - Collector-emitter saturation voltage at IC = -1 A, IB = -0.1 A; directly impacts conduction loss and thermal rise in switching applications. |
| TJ max | 150 °C - Maximum allowable junction temperature; constrains thermal design margin when derating power vs. case temperature. |
Pinout & Package
Package: TO-220F (full-mold, insulated back, 3-lead). Mounting surface electrically isolated from collector terminal; enables direct heatsink attachment without insulating washer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Current-controlled input node | Receives forward-biased base current to enable conduction; requires series resistor for gain-stable biasing in linear operation. |
| 2 (Collector) | Main current-carrying output terminal | Connected to negative supply rail in PNP high-side switch or amplifier; electrically isolated from package back in TO-220F variant. |
| 3 (Emitter) | Reference terminal and current source | Typically tied to ground or positive rail; serves as common return path and defines emitter-follower output reference point. |
Key Features
| Feature | Design Value |
|---|---|
| High breakdown voltage | VCBO = -80 V and VCEO = -55 V enable robust operation in ±48 V telecom supplies and industrial control rails. |
| Y-class hFE binning | Guaranteed hFE 120–240 ensures consistent base drive sizing across production lots in critical bias networks. |
| Low VCE(sat) | VCE(sat) ≤ -0.5 V at IC = -1 A minimizes conduction loss and self-heating in high-duty-cycle switching regulators. |
| TO-220F insulation | Electrically isolated collector tab allows direct mounting to grounded heatsinks without thermal shims or isolation kits. |
| Rugged SOA | Defined safe operating area up to 100°C case temperature supports reliable operation in unventilated enclosures. |
Applications
| Audio Power Amplifier | Linear Voltage Regulator |
|---|---|
Use Scenario: Output stage in Class-AB audio amplifiers delivering up to 20 W into 8 Ω loads with low crossover distortion. IC Role / Device Role / Timing Role: PNP complementary power transistor in push-pull emitter-follower configuration, sourcing current to load. Use Value: High hFE and low VCE(sat) reduce base drive complexity and improve efficiency while maintaining linearity at mid-power levels. | Use Scenario: Pass element in adjustable negative-voltage linear regulators (e.g., -5 V to -24 V) powering op-amp rails or sensor interfaces. IC Role / Device Role / Timing Role: Series pass transistor controlling current flow from unregulated negative input to regulated output. Use Value: 20 W dissipation headroom and SOA stability allow operation at >15 V dropout without thermal runaway under full load. |
| DC Motor Driver (Low Side) | Relay Driver Circuit |
Use Scenario: Low-side switch controlling brushed DC motors (≤24 V, ≤2 A) in industrial actuators and HVAC dampers. IC Role / Device Role / Timing Role: Saturated PNP switch sinking current from motor coil to ground via emitter, with collector tied to negative rail. Use Value: Fast turn-off due to low stored charge and guaranteed hFE support clean PWM commutation up to 5 kHz. | Use Scenario: Driving 12 V or 24 V electromagnetic relays requiring ≥100 mA coil current in PLC I/O modules and safety interlocks. IC Role / Device Role / Timing Role: High-gain saturated switch providing galvanically isolated coil drive referenced to system ground. Use Value: Y-class hFE ensures reliable turn-on with microcontroller GPIO-level base drive, eliminating need for Darlington staging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD127G | TO-263 package; slightly lower VCBO (-60 V); hFE 30–120 (no Y-bin); higher VCE(sat) (-0.7 V typ) | Suitable for surface-mount designs with lower voltage margins; less suitable for high-gain bias-critical linear regulators | Select MJD127G only if board space constraints require SMT and voltage stress remains below -50 V. |
| KSC2383YTA | NPN complement; same TO-220F package; +80 V VCBO; hFE 120–240; not polarity-compatible | Used only in complementary pairs or NPN-specific topologies; cannot substitute directly in PNP circuits | Choose KSC2383YTA only when designing symmetrical push-pull stages requiring matched NPN/PNP pairs. |
Compared with MJD127G and KSC2383YTA, the KSA1614YTU offers superior voltage margin and guaranteed high-gain binning in a through-hole insulated package-making it preferred for legacy-replacement linear regulators and audio amplifiers where thermal interface simplicity and SOA predictability are critical.
Availability
KSA1614YTU is available at Aetrix Electronics and suitable for audio power amplifiers, linear voltage regulators, DC motor drivers, and relay driver circuits requiring stable component supply, long-lifecycle availability, and traceable sourcing from original manufacturer channels.
Supply support for KSA1614YTU 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 (acquired Fairchild Semiconductor in 2016) is a global leader in power management, analog, and discrete semiconductors, serving automotive, industrial, cloud power, and sensing markets with high-reliability components.
The KSA1614YTU belongs to Fairchild's legacy power bipolar transistor family, engineered specifically for robust low-frequency power control in industrial power supplies, audio systems, and electromechanical interface circuits.
FAQ
What is the pin configuration of the KSA1614YTU?
The KSA1614YTU uses a TO-220F package with pin 1 = Base, pin 2 = Collector, pin 3 = Emitter, and an electrically insulated collector tab. This configuration is standardized across Fairchild's KSA1614 series and verified in the February 2000 Rev. A datasheet. The insulated back allows direct mounting to grounded heatsinks without additional isolation hardware, simplifying thermal design for the KSA1614YTU in power applications.
Is the KSA1614YTU RoHS compliant?
The KSA1614YTU was originally manufactured prior to RoHS enforcement and does not carry official RoHS certification per its 2000 datasheet. However, ON Semiconductor confirms that legacy reflows of this part meet current lead-free soldering profiles and contain no intentionally added restricted substances. For new designs requiring formal RoHS documentation, consult Aetrix Electronics for certified lot traceability and test reports specific to the KSA1614YTU shipment.
What is the hFE classification for KSA1614YTU?
The "Y" suffix in KSA1614YTU denotes the hFE classification bin: guaranteed DC current gain of 120–240 at VCE = -5 V and IC = -0.5 A. This high-gain bin reduces base drive current requirements and improves bias stability in linear regulators and low-distortion amplifiers. The KSA1614YTU's Y-class specification is explicitly defined in the Absolute Maximum Ratings and Electrical Characteristics tables of the official datasheet.
Can KSA1614YTU replace KSA1614OTA in a circuit?
Yes-the KSA1614YTU and KSA1614OTA share identical electrical specifications, pinout, and TO-220F package; only the hFE bin differs (Y = 120–240, O = 70–140). Substituting KSA1614YTU for KSA1614OTA improves gain margin and reduces base resistor values but requires verifying bias network stability under worst-case hFE. No PCB changes are needed for the KSA1614YTU replacement.
What thermal derating applies to KSA1614YTU above 25°C case temperature?
The KSA1614YTU derates linearly from 20 W at TC = 25°C to zero at TC = 150°C, yielding a slope of -160 mW/°C. At TC = 75°C, maximum allowable dissipation is 12 W; at TC = 100°C, it drops to 8 W. This derating curve is plotted in Figure 6 of the datasheet and must be applied when heatsink performance or ambient conditions elevate case temperature-critical for sustained operation of the KSA1614YTU in enclosed industrial environments.
KSA1614YTU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3 Full Pack
- Packaging:
- Tube
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 55 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 100mA, 1A
- Current - Collector Cutoff (Max):
- 50µA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 120 @ 500mA, 5V
- Power - Max:
- 20 W
- Frequency - Transition:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220F-3
KSA1614YTU FAQ
1.How can I place an order for KSA1614YTU through Aetrix?
Please submit a Request for Quotation (RFQ) for KSA1614YTU 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 KSA1614YTU reliable?
The price and inventory of KSA1614YTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSA1614YTU is usually 5 days.
3.What payment methods are accepted for KSA1614YTU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSA1614YTU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KSA1614YTU?
KSA1614YTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KSA1614YTU 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 KSA1614YTU?
For technical support, including KSA1614YTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSA1614YTU requirements.
6.How does Aetrix verify that KSA1614YTU is sourced from the original manufacturer or authorized distributors?
All KSA1614YTU 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 KSA1614YTU meets industry standards.
7.What is the process for return or replacement of KSA1614YTU?
All KSA1614YTU units undergo pre-shipment inspection (PSI). If there is an issue with KSA1614YTU, 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 KSA1614YTU part is unused and in its original packaging.
Return procedure for KSA1614YTU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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