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

onsemi KSB1116ALTA

Name: KSB1116ALTA
Brand: onsemi
SKU: KSB1116ALTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KSB1116ALTA

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: KSB1116ALTA.pdf

Description:: TRANS PNP 60V 1A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KSB1116ALTA from Fairchild Semiconductor is a PNP epitaxial silicon transistor designed for audio frequency power amplification and medium-speed switching applications. It features V_CEO = −60 V, I_C = −1 A (DC), P_C = 0.75 W, hFE = 135–400 (Class G/L), and TO-92 package - used in complementary push-pull amplifier stages with KSD1616/1616A.

For engineers reviewing the KSB1116ALTA datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed hFE classification, low V_CE(sat) at high current, safe operating area under pulse conditions, and thermal derating behavior in compact audio amplifier PCB layouts.

Technical Context

This device operates as a medium-power PNP bipolar junction transistor with DC current gain hFE binned per JEDEC standard (G: 200–400, L: 300–600). Its f_T of 70–120 MHz supports stable operation up to audio band edges and fast switching transitions (t_ON/t_F ≤ 0.07 µs).

The KSB1116ALTA is specified for linear amplification (V_CE = −2 V, I_C = −100 mA) and saturated switching (I_C = −1 A, I_B = −50 mA), with V_BE(sat) = −0.9 to −1.2 V and V_CE(sat) = −0.2 to −0.3 V - enabling efficient drive in Class AB output stages and relay drivers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−60 V: Maximum collector-emitter voltage before breakdown in common-emitter configuration - sets safe rail voltage limit in amplifier designs.
I_C (DC)	−1 A: Continuous collector current rating - defines maximum sustained output current in linear or switching mode.
P_C	0.75 W: Total power dissipation at T_A = 25°C - determines heatsinking requirement in TO-92 housing.
hFE	135–400 (Class G/L): DC current gain range at V_CE = −2 V, I_C = −100 mA - ensures predictable bias stability in amplifier feedback networks.
V_CE(sat)	−0.2 to −0.3 V at I_C = −1 A, I_B = −50 mA - minimizes conduction loss and self-heating in saturated switch applications.
f_T	70–120 MHz: Current gain-bandwidth product - confirms adequate gain margin for audio-frequency signal amplification without instability.

Pinout & Package

Package: TO-92 - through-hole, epoxy-molded, 3-lead plastic package with standardized lead spacing (1.27 mm pitch), suitable for manual assembly and wave soldering in low-to-medium volume production.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source terminal in PNP operation	Connected to positive supply rail in common-emitter amplifier; polarity must be observed to avoid reverse-bias damage.
2 (Collector)	Current sink terminal	Drives load to ground or negative rail; requires heat path consideration due to 0.75 W dissipation limit.
3 (Base)	Control input for minority-carrier injection	Requires current-limited drive (e.g., series resistor) to achieve target I_B = −50 mA for full saturation at I_C = −1 A.

Key Features

Feature	Design Value
Complementary pair compatibility	Designed as direct complement to KSD1616/1616A NPN transistors - enables matched push-pull output stages with symmetrical gain and saturation characteristics.
Guaranteed hFE classification	Bin-coded (G/L) hFE range ensures consistent DC bias point across production lots - reduces need for per-unit trimming in production amplifiers.
Low V_CE(sat) at high current	≤ −0.3 V at I_C = −1 A - lowers power loss and thermal stress in switching regulators and relay drivers operating near rated current.
Fast switching performance	t_ON/t_F ≤ 0.07 µs - supports clean square-wave generation up to ~5 MHz in digital logic interface circuits.

Applications

Audio Power Amplifier Output Stage	DC Motor Driver (Small Brushed)
Use Scenario: Complementary Class AB output stage in portable stereo amplifiers delivering 1–2 W into 8 Ω loads. IC Role / Device Role / Timing Role: PNP output transistor conducting during negative half-cycle of audio waveform; paired with KSD1616A NPN. Use Value: Low V_CE(sat) and matched hFE ensure minimal crossover distortion and thermal drift across temperature.	Use Scenario: H-bridge half-bridge driver for 12 V, 500 mA brushed DC motors in robotics and actuator control. IC Role / Device Role / Timing Role: High-side PNP switch controlling motor voltage rail; driven by microcontroller GPIO via base resistor network. Use Value: Guaranteed hFE ≥ 200 ensures reliable saturation at I_B = −10 mA, minimizing on-state power loss.
Relay Driver Circuit	Linear Voltage Regulator Pass Element
Use Scenario: Driving 12 V, 400 mA coil relays in industrial PLC I/O modules with opto-isolated control inputs. IC Role / Device Role / Timing Role: Saturated switch connecting relay coil to ground; base driven by open-collector logic output. Use Value: Fast t_ON/t_F < 0.1 µs prevents contact chatter during rapid relay cycling.	Use Scenario: Series pass element in adjustable 5–12 V linear regulators delivering up to 800 mA for analog sensor subsystems. IC Role / Device Role / Timing Role: PNP pass transistor operating in active region; emitter tied to input, collector to output, base controlled by error amplifier. Use Value: SOA curve supports continuous operation at V_IN–V_OUT = 5 V, I_OUT = 0.8 A without secondary heatsink.

Audio Power Amplifier Output Stage

DC Motor Driver (Small Brushed)

Use Scenario: Complementary Class AB output stage in portable stereo amplifiers delivering 1–2 W into 8 Ω loads.

IC Role / Device Role / Timing Role: PNP output transistor conducting during negative half-cycle of audio waveform; paired with KSD1616A NPN.

Use Value: Low V_CE(sat) and matched hFE ensure minimal crossover distortion and thermal drift across temperature.

Use Scenario: H-bridge half-bridge driver for 12 V, 500 mA brushed DC motors in robotics and actuator control.

IC Role / Device Role / Timing Role: High-side PNP switch controlling motor voltage rail; driven by microcontroller GPIO via base resistor network.

Use Value: Guaranteed hFE ≥ 200 ensures reliable saturation at I_B = −10 mA, minimizing on-state power loss.

Relay Driver Circuit

Linear Voltage Regulator Pass Element

Use Scenario: Driving 12 V, 400 mA coil relays in industrial PLC I/O modules with opto-isolated control inputs.

IC Role / Device Role / Timing Role: Saturated switch connecting relay coil to ground; base driven by open-collector logic output.

Use Value: Fast t_ON/t_F < 0.1 µs prevents contact chatter during rapid relay cycling.

Use Scenario: Series pass element in adjustable 5–12 V linear regulators delivering up to 800 mA for analog sensor subsystems.

IC Role / Device Role / Timing Role: PNP pass transistor operating in active region; emitter tied to input, collector to output, base controlled by error amplifier.

Use Value: SOA curve supports continuous operation at V_IN–V_OUT = 5 V, I_OUT = 0.8 A without secondary heatsink.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP bipolar transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD112G	TO-220 package, higher P_C = 30 W, V_CEO = −100 V, hFE = 1000–3000 - significantly higher gain and power capability.	Suitable for higher-current (>2 A) or higher-voltage (>60 V) switching where TO-92 thermal limits are exceeded.	Select MJD112G only when board layout allows TO-220 footprint and thermal management supports >30 W dissipation.
KSA992F	TO-92 package, V_CEO = −120 V, I_C = −0.7 A, hFE = 200–400 - higher voltage rating but lower current and same gain binning.	Preferred in high-side switch applications requiring >80 V blocking, e.g., automotive 24 V systems with load dump transients.	Choose KSA992F when V_CEO margin > 80 V is required and I_C ≤ 0.7 A suffices; retains TO-92 compatibility.

Compared with KSB1116ALTA, MJD112G offers scalable power handling in larger package while KSA992F extends voltage safety margin within identical TO-92 form factor - neither is pin-compatible, but both serve overlapping functional roles in discrete PNP switching and amplification.

Availability

KSB1116ALTA is available at Aetrix Electronics and suitable for audio amplifier output stages, relay drivers, DC motor control circuits, and linear regulator pass elements requiring stable component supply and long-term obsolescence management.

Supply support for KSB1116ALTA 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.

The KSB1116ALTA belongs to Fairchild's legacy audio and general-purpose bipolar transistor family, engineered for cost-sensitive, thermally constrained linear and switching applications in consumer and industrial electronics.

FAQ

What is the maximum continuous collector current rating for KSB1116ALTA?

The KSB1116ALTA has a maximum continuous collector current (I_C) rating of −1 A at T_A = 25°C. This rating assumes proper PCB copper area for heat dissipation and derates linearly above 25°C ambient per the published power derating curve - at 100°C ambient, usable I_C drops to approximately −0.5 A under DC conditions.

Is KSB1116ALTA pin-compatible with KSB1116 or KSB1116A variants?

Yes, KSB1116ALTA shares identical TO-92 pinout (Emitter–Collector–Base, left-to-right when viewing flat side) and mechanical dimensions with KSB1116 and KSB1116A. The "LTA" suffix denotes tape-and-reel packaging and hFE binning (Class L), but electrical specifications and pin assignment remain fully aligned across this family.

What does the 'L' in KSB1116ALTA signify?

The 'L' in KSB1116ALTA indicates hFE classification per Fairchild's binning standard: Class L corresponds to DC current gain of 300–600 at V_CE = −2 V and I_C = −100 mA. This higher-gain bin improves bias stability in low-base-drive amplifier designs compared to Class G (200–400) or standard KSB1116 (135–270).

Can KSB1116ALTA be used in place of KSD1616A in a complementary pair?

No - KSB1116ALTA is a PNP transistor and KSD1616A is an NPN transistor; they are complementary *types*, not interchangeable parts. The KSB1116ALTA is specifically designed to pair *with* KSD1616A in push-pull configurations, sharing matched V_CE(sat), f_T, and thermal characteristics for balanced performance.

What is the safe operating area (SOA) limitation for pulsed operation of KSB1116ALTA?

The KSB1116ALTA SOA curve permits pulsed collector currents up to −2 A at V_CE = −10 V for PW ≤ 10 ms and duty cycle ≤ 50%. At shorter pulses (PW ≤ 1 ms), peak current may reach −3 A provided average power remains below 0.75 W - always verify against the published SOA graph in the original Fairchild datasheet Rev. A2.

KSB1116ALTA Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 1 A

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

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 50mA, 1A

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 300 @ 100mA, 2V

Power - Max:: 750 mW

Frequency - Transition:: 120MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

KSB1116ALTA FAQ

1.How can I place an order for KSB1116ALTA through Aetrix?

Please submit a Request for Quotation (RFQ) for KSB1116ALTA 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 KSB1116ALTA reliable?

The price and inventory of KSB1116ALTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KSB1116ALTA is usually 5 days.

3.What payment methods are accepted for KSB1116ALTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KSB1116ALTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KSB1116ALTA?

KSB1116ALTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KSB1116ALTA 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 KSB1116ALTA?

For technical support, including KSB1116ALTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KSB1116ALTA requirements.

6.How does Aetrix verify that KSB1116ALTA is sourced from the original manufacturer or authorized distributors?

All KSB1116ALTA 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 KSB1116ALTA meets industry standards.

7.What is the process for return or replacement of KSB1116ALTA?

All KSB1116ALTA units undergo pre-shipment inspection (PSI). If there is an issue with KSB1116ALTA, 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 KSB1116ALTA part is unused and in its original packaging.

Return procedure for KSB1116ALTA:

1.Submit a request within 90 days.

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

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