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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi KSP2907ATF

Name: KSP2907ATF
Brand: onsemi
SKU: KSP2907ATF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSP2907ATF

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Datasheet:: KSP2907ATF.pdf

Description:: TRANS PNP 60V 0.6A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSP2907ATF from ON Semiconductor is a PNP bipolar junction transistor (BJT) designed for general-purpose amplification and switching in low-to-medium power linear and digital circuits. It features V_CEO = −60 V, I_C = −600 mA, h_FE = 75–300 (at I_C = −0.1 to −500 mA), f_T = 200 MHz, and TO-92 package with straight leads and tape-and-reel packaging. It is commonly used in discrete amplifier stages, level shifters, and load switches in consumer and industrial control boards.

For engineers reviewing the KSP2907ATF datasheet, pinout, applications, or equivalent options, key selection considerations include its PNP polarity, −60 V breakdown rating, DC current gain variation across collector current range, saturation voltage behavior at high drive levels, and TO-92 thermal performance under continuous conduction.

Technical Context

The KSP2907ATF operates as a silicon PNP BJT with fixed-emitter bias topology, requiring reverse-polarity supply configuration. Its h_FE spans 75 to 300 depending on I_C, and it delivers V_CE(sat) = −0.4 V at I_C = −150 mA / I_B = −15 mA, rising to −1.6 V at I_C = −500 mA / I_B = −50 mA - indicating strong current-handling capability with predictable saturation trade-offs.

It supports high-speed switching with t_ON = 45 ns and t_OFF = 100 ns under specified test conditions, and exhibits C_obo = 8 pF at V_CB = −10 V, enabling stable operation in audio-frequency amplifiers and pulse-width modulated drivers up to ~200 MHz small-signal bandwidth.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−60 V: Maximum safe collector-emitter reverse voltage before breakdown; defines usable supply headroom in PNP high-side switch designs.
I_C	−600 mA: Continuous DC collector current limit; sets maximum load drive capacity in saturated switching applications.
h_FE	75–300: DC current gain range across I_C = −0.1 mA to −500 mA; determines required base drive for target collector current in linear or switching modes.
f_T	200 MHz: Current gain–bandwidth product at I_C = −50 mA, V_CE = −20 V; indicates usable small-signal amplification bandwidth in RF or fast-switching contexts.
V_CE(sat)	−0.4 V (min) at I_C = −150 mA / I_B = −15 mA: Low saturation voltage enables efficient power delivery with <0.06 W conduction loss at rated current.
P_D	625 mW: Maximum power dissipation at T_A = 25°C; derates by 5 mW/°C above ambient, limiting usable power in enclosed or high-temperature environments.

Pinout & Package

Package: TO-92, 3-lead, straight lead form, tape-and-reel packing (suffix TF). Pin configuration follows standard KSP2907A layout: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source terminal for PNP device	Connected to most positive rail in common-emitter switch; provides reference node for base bias network.
2 (Base)	Control input for minority-carrier injection	Receives negative-going drive signal; requires current-limited sourcing to avoid overdrive and thermal runaway.
3 (Collector)	Output current sink terminal	Drives load to ground or lower potential; voltage swing limited by V_CEO and external pull-up impedance.

Key Features

Feature	Design Value
High V_CEO rating	−60 V enables use in 48 V industrial control rails and automotive battery-supplied logic interfaces without additional clamping.
Wide h_FE range	75–300 across five decades of I_C allows flexible bias design for both low-current sensing and high-current switching with same part.
Low V_CE(sat)	−0.4 V at moderate drive ensures <60 mW conduction loss in 150 mA loads, improving thermal margin in compact PCB layouts.
Fast switching	t_ON/t_OFF = 45/100 ns supports PWM frequencies up to ~2 MHz in non-critical timing applications with minimal dead-time overhead.

Applications

Audio Pre-Amplifier Stage	Discrete Level Shifter
Use Scenario: Amplifying weak microphone or line-level signals in analog audio front-ends before ADC sampling. IC Role / Device Role / Timing Role: PNP BJT configured in common-emitter topology to provide inverted voltage gain with low noise and wide bandwidth. Use Value: 200 MHz f_T and 8 pF C_obo support flat frequency response up to 20 kHz; h_FE ≥ 100 at I_C = −1 mA ensures stable bias point with minimal base current error.	Use Scenario: Translating logic signals between 5 V microcontroller outputs and −12 V analog circuitry in mixed-voltage instrumentation. IC Role / Device Role / Timing Role: PNP switch operating in saturation/cutoff to invert and shift TTL-compatible signals to negative-rail referenced domains. Use Value: V_CEO = −60 V accommodates worst-case transients; V_CE(sat) ≤ −0.4 V guarantees clean low-state definition at −12 V rail with <0.5 V margin.
Relay Driver Circuit	Current Mirror Reference
Use Scenario: Driving electromagnetic relay coils requiring 100–500 mA hold current in HVAC control panels and PLC I/O modules. IC Role / Device Role / Timing Role: High-current PNP switch sinking coil current to ground while powered from positive supply via collector resistor or direct connection. Use Value: I_C = −600 mA rating and 625 mW power dissipation allow continuous 400 mA coil drive at 25°C ambient without heatsinking.	Use Scenario: Building matched current sources in precision analog sensor conditioning circuits where temperature-stable bias is critical. IC Role / Device Role / Timing Role: One half of a discrete PNP current mirror pair, biased at I_C = −1 mA to set reference current for op-amp bias networks. Use Value: h_FE ≥ 75 at I_C = −1 mA ensures <1.5% mirror ratio error; low V_BE(sat) = −1.3 V minimizes compliance voltage requirement.

Audio Pre-Amplifier Stage

Discrete Level Shifter

Use Scenario: Amplifying weak microphone or line-level signals in analog audio front-ends before ADC sampling.

IC Role / Device Role / Timing Role: PNP BJT configured in common-emitter topology to provide inverted voltage gain with low noise and wide bandwidth.

Use Value: 200 MHz f_T and 8 pF C_obo support flat frequency response up to 20 kHz; h_FE ≥ 100 at I_C = −1 mA ensures stable bias point with minimal base current error.

Use Scenario: Translating logic signals between 5 V microcontroller outputs and −12 V analog circuitry in mixed-voltage instrumentation.

IC Role / Device Role / Timing Role: PNP switch operating in saturation/cutoff to invert and shift TTL-compatible signals to negative-rail referenced domains.

Use Value: V_CEO = −60 V accommodates worst-case transients; V_CE(sat) ≤ −0.4 V guarantees clean low-state definition at −12 V rail with <0.5 V margin.

Relay Driver Circuit

Current Mirror Reference

Use Scenario: Driving electromagnetic relay coils requiring 100–500 mA hold current in HVAC control panels and PLC I/O modules.

IC Role / Device Role / Timing Role: High-current PNP switch sinking coil current to ground while powered from positive supply via collector resistor or direct connection.

Use Value: I_C = −600 mA rating and 625 mW power dissipation allow continuous 400 mA coil drive at 25°C ambient without heatsinking.

Use Scenario: Building matched current sources in precision analog sensor conditioning circuits where temperature-stable bias is critical.

IC Role / Device Role / Timing Role: One half of a discrete PNP current mirror pair, biased at I_C = −1 mA to set reference current for op-amp bias networks.

Use Value: h_FE ≥ 75 at I_C = −1 mA ensures <1.5% mirror ratio error; low V_BE(sat) = −1.3 V minimizes compliance voltage requirement.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP general-purpose amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPSA92	V_CEO = −300 V, h_FE = 50–250, TO-92 package, same pinout (E-B-C)	Higher breakdown enables use in flyback snubbers and HV bias supplies; lower h_FE min requires stronger base drive.	Select when >−60 V blocking is required and higher V_CEO outweighs reduced gain consistency at low I_C.
KSP2222ATF	PNP vs NPN polarity; otherwise identical TO-92, tape-and-reel, same pinout orientation but reversed emitter/collector roles	Not interchangeable without circuit redesign; suitable only where NPN topology fits system architecture (e.g., low-side switching).	Choose only if board layout and bias network support NPN configuration; not a drop-in replacement for KSP2907ATF.

Compared with MPSA92 and KSP2222ATF, the KSP2907ATF offers optimal balance of −60 V rating, wide h_FE range, and proven thermal stability in TO-92 for cost-sensitive linear and switching roles - whereas MPSA92 trades gain for voltage headroom, and KSP2222ATF requires full schematic revision due to polarity inversion.

Availability

KSP2907ATF is available at Aetrix Electronics and suitable for audio pre-amplifiers, discrete level shifters, relay driver circuits, and current mirror references requiring stable component supply and JEDEC-compliant TO-92 packaging.

Supply support for KSP2907ATF 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, sensors, and discrete devices for automotive, industrial, cloud computing, and consumer markets.

The KSP2907ATF belongs to ON Semiconductor's legacy general-purpose bipolar transistor product line, originally developed by Fairchild Semiconductor to deliver reliable, low-cost PNP amplification and switching for broad-based electronics design.

FAQ

What is the pin configuration of the KSP2907ATF?

The KSP2907ATF uses a standard TO-92 package with pinout: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector. This matches the KSP2907A designation (not the "C" variant), and is confirmed in the official datasheet Figure 5 and ordering table. The "TF" suffix denotes tape-and-reel packaging with straight leads, but does not alter the terminal assignment. Always verify orientation using the flat side and lead-down view per JEDEC TO-92 standards.

Does the KSP2907ATF support high-frequency amplification?

Yes, the KSP2907ATF has a current gain–bandwidth product (f_T) of 200 MHz at I_C = −50 mA and V_CE = −20 V, making it suitable for small-signal amplification up to the upper audio band and low-MHz RF stages. However, gain rolls off with increasing I_C and temperature; for stable 10–20 MHz operation, bias at I_C ≈ −10 mA is recommended. The KSP2907ATF is not intended for GHz-range applications.

What is the maximum continuous collector current for the KSP2907ATF?

The KSP2907ATF supports a maximum continuous collector current (I_C) of −600 mA at T_A = 25°C, as specified in the Absolute Maximum Ratings table. Derating applies above 25°C: power dissipation drops by 5 mW/°C, limiting usable I_C in warm environments. At I_C = −500 mA, V_CE(sat) reaches −1.6 V, resulting in ~0.8 W dissipation - requiring careful thermal design on FR-4 PCBs.

Can the KSP2907ATF replace the KSP2907ABU in a design?

Yes, the KSP2907ATF is functionally identical to the KSP2907ABU in electrical and thermal specifications; the only difference is packaging - TF = tape-and-reel, BU = bulk. Both share the same TO-92 package, pinout (E-B-C), and marking (KSP2907A). No PCB or schematic changes are needed when substituting KSP2907ATF for KSP2907ABU, provided the assembly process supports tape-and-reel feed.

Is the KSP2907ATF suitable for automotive applications?

No, the KSP2907ATF is not qualified for automotive use. Per the original Fairchild datasheet and ON Semiconductor's Authorized Use policy, this device is classified as a commercial-grade PNP transistor intended for consumer and industrial applications. It lacks AEC-Q101 qualification, extended temperature screening, and failure rate data required for automotive systems. For automotive-grade alternatives, consult ON Semiconductor's AEC-Q101-qualified MMBT2907A or NSS2907A series.

KSP2907ATF Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 600 mA

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 1.6V @ 50mA, 500mA

Current - Collector Cutoff (Max):: 10nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 150mA, 10V

Power - Max:: 625 mW

Frequency - Transition:: 200MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

KSP2907ATF FAQ

1.How can I place an order for KSP2907ATF through Aetrix?

Please submit a Request for Quotation (RFQ) for KSP2907ATF 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 KSP2907ATF reliable?

The price and inventory of KSP2907ATF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSP2907ATF is usually 5 days.

3.What payment methods are accepted for KSP2907ATF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSP2907ATF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSP2907ATF?

KSP2907ATF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSP2907ATF 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 KSP2907ATF?

For technical support, including KSP2907ATF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSP2907ATF requirements.

6.How does Aetrix verify that KSP2907ATF is sourced from the original manufacturer or authorized distributors?

All KSP2907ATF 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 KSP2907ATF meets industry standards.

7.What is the process for return or replacement of KSP2907ATF?

All KSP2907ATF units undergo pre-shipment inspection (PSI). If there is an issue with KSP2907ATF, 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 KSP2907ATF part is unused and in its original packaging.

Return procedure for KSP2907ATF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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