onsemi KSC2316YBU

Overview

KSC2316YBU from ON Semiconductor is an NPN epitaxial silicon transistor in TO-92L package, rated for 120 V CBO/CEO, 800 mA collector current, 900 mW power dissipation, and 120 MHz f_T, used as audio power amplifier driver stage in consumer audio equipment.

For engineers reviewing the KSC2316YBU datasheet, pinout, applications, or equivalent options, key selection criteria include breakdown voltage margin, DC current gain at 100 mA, saturation voltage under 500 mA drive, thermal resistance (130 °C/W), and complementarity with KSA916 for push-pull designs.

Technical Context

This discrete NPN bipolar junction transistor operates in linear amplification and switching modes, with guaranteed h_FE of 120–240 at IC = 100 mA and V_CE = 5 V, and V_CE(sat) ≤ 1 V at IC = 500 mA / IB = 50 mA. Its 30 pF output capacitance and 120 MHz f_T support mid-frequency audio driver operation.

The device features a non-JEDEC 8 mm tall TO-92L body with emitter-collector-base pinout (1–2–3), optimized for PCB mounting on FR-4 with minimum land pattern, and exhibits low leakage (ICBO ≤ 0.1 μA at VCB = 120 V) for stable biasing in Class-A/B amplifier stages.

Key Specifications

Pinout & Package

Package: TO-92L (non-JEDEC, 8 mm tall body, lead form TA type). Pin identification verified per Fairchild KSC2316 Rev. 1.4 datasheet Figure 6.

Key Features

Applications

Equivalent & Alternatives

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

Compared with KSC2316YBU, KSC2316YTA offers identical performance in a JEDEC-standard TO-92 package for SMT compatibility, while MPSA42 trades audio-optimized gain consistency for higher voltage tolerance-making it unsuitable for precision driver applications but viable in HV switching where gain spread is acceptable.

Availability

KSC2316YBU is available at Aetrix Electronics and suitable for audio power amplifiers, driver-stage circuits, complementary transistor pairs, and low-power DC motor control requiring stable component supply and long-term industrial availability.

Supply support for KSC2316YBU 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, sensor, and logic solutions for automotive, industrial, and consumer markets.

The KSC2316YBU belongs to ON Semiconductor's legacy Fairchild discrete transistor portfolio, designed specifically for audio frequency amplification and driver-stage applications requiring high-voltage tolerance and stable DC gain.

FAQ

What is the pin configuration of the KSC2316YBU?

The KSC2316YBU uses a TO-92L package with pin 1 as Emitter, pin 2 as Collector, and pin 3 as Base - confirmed in Fairchild KSC2316 Rev. 1.4 datasheet Figure 6. This non-JEDEC 8 mm tall body requires specific land pattern dimensions on FR-4 PCBs to ensure thermal reliability. The KSC2316YBU pinout is fixed and not interchangeable with standard JEDEC TO-92 variants without layout verification.

Is the KSC2316YBU suitable for audio amplifier output stages?

Yes, the KSC2316YBU is explicitly specified for audio power amplifier applications and driver-stage amplification per its official features list. With 120 V breakdown ratings, 800 mA IC(max), and hFE of 120–240 at 100 mA, the KSC2316YBU delivers the voltage headroom, current capability, and gain stability needed for Class-A/B output stages driving 4–8 Ω loads up to ~2 W. Its 120 MHz f_T supports full audio bandwidth fidelity.

How does the KSC2316YBU compare to the KSA916?

The KSC2316YBU is the designated NPN complement to the KSA916 PNP transistor, sharing identical VCBO/VCEO (120 V), IC(max) (800 mA), and thermal characteristics. Both are optimized for push-pull configurations: the KSC2316YBU handles positive half-cycles while KSA916 handles negative half-cycles. Their matched hFE ranges and saturation behavior enable balanced conduction and reduced crossover distortion in audio output stages using the KSC2316YBU and KSA916 together.

What is the maximum power dissipation of the KSC2316YBU and how is it derated?

The KSC2316YBU has a maximum power dissipation of 900 mW at TA = 25°C, with a derating factor of 7.2 mW/°C above that temperature. This means usable power drops to 684 mW at 55°C ambient and to 468 mW at 85°C ambient. The 130 °C/W junction-to-ambient thermal resistance confirms this derating slope. For reliable operation above 25°C, the KSC2316YBU requires adequate PCB copper area or heatsinking - especially when operating near IC = 500 mA where VCE(sat) contributes significant conduction loss.

Does the KSC2316YBU have a documented replacement or upgrade path within ON Semiconductor's portfolio?

ON Semiconductor does not list a direct upgraded successor to the KSC2316YBU in current active portfolios. The KSC2316YBU remains a legacy Fairchild part supported through ON Semiconductor's continuity program. While functionally similar alternatives like KSC2316YTA exist (same die, JEDEC TO-92), no newer-generation replacement with enhanced specs (e.g., higher f_T, lower VCE(sat)) has been announced. Customers should continue using the KSC2316YBU for existing designs and consult ON Semiconductor's product change notifications for lifecycle updates affecting the KSC2316YBU.