onsemi KSP93TA

Overview

KSP93TA from onsemi is a PNP epitaxial silicon transistor rated for −300 V collector-emitter voltage, −500 mA continuous collector current, and 625 mW power dissipation at 25°C ambient. It delivers DC current gain (hFE) of 25–40 at IC = −10 mA, VCE = −10 V, and operates with fT = 50 MHz, serving as a high-voltage switching or linear amplification device in industrial power supplies and relay drivers.

For engineers reviewing the KSP93TA datasheet, pinout, applications, or equivalent options, key selection criteria include its −300 V breakdown rating, TO-92 leadformed package (Case 135AR), saturation voltages (VCE(sat) ≤ −0.50 V, VBE(sat) ≤ −0.90 V at IC = −20 mA/IB = −2 mA), and thermal derating profile (5 mW/°C above 25°C ambient).

Technical Context

This PNP bipolar junction transistor is optimized for high-voltage switching applications where robust off-state blocking and controlled turn-on behavior are required. Its −300 V VCBO and VCEO ratings enable use in flyback snubbers, HV DC-DC converter switches, and solid-state relay output stages without external clamping.

The device exhibits low output capacitance (Cob ≤ 6 pF at VCB = −20 V), supporting moderate-frequency switching up to ~50 MHz fT, while maintaining stable hFE across IC = −1 mA to −30 mA under fixed VCE = −10 V bias conditions.

Key Specifications

Pinout & Package

Package: TO-92 leadformed (Case 135AR), 4.83 mm × 4.76 mm body, epoxy molded, through-hole mountable with formed leads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-voltage switching applications.

Compared with MPSA92 and KSP94TA, the KSP93TA offers balanced high-voltage capability (−300 V), verified low-output capacitance (≤6 pF), and production-tested hFE spread-making it optimal for cost-sensitive industrial controls where 300 V margin suffices and layout reuse is prioritized.

Availability

KSP93TA is available at Aetrix Electronics and suitable for industrial relay drivers, high-voltage DC-DC converters, AC line monitoring circuits, and legacy CRT deflection systems requiring stable component supply and long-term manufacturability.

Supply support for KSP93TA 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, delivering discrete, analog, logic, and custom devices for automotive, industrial, cloud, and IoT markets.

The KSP93TA belongs to onsemi's high-voltage bipolar transistor product line, engineered specifically for ruggedized industrial switching and linear amplification where reliability under sustained high-voltage stress is essential.

FAQ

What is the maximum collector-emitter voltage rating for KSP93TA?

The KSP93TA has a guaranteed minimum collector-emitter breakdown voltage (BVCEO) of −300 V at IC = −1 mA and IB = 0. This rating is validated per onsemi's absolute maximum ratings table and applies under pulsed test conditions (PW ≤ 300 µs, duty cycle ≤ 2%). The KSP93TA must not be operated beyond this voltage in continuous or repetitive modes without external protection.

Is KSP93TA pin-compatible with KSP92TA or MPSA92?

Yes, the KSP93TA uses the same TO-92 leadformed package (Case 135AR) with identical pinout: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector. It shares mechanical and electrical compatibility with KSP92TA and MPSA92, enabling drop-in replacement in existing PCB layouts designed for those parts-provided voltage, gain, and capacitance requirements align.

What is the typical DC current gain (hFE) of KSP93TA at 10 mA collector current?

The KSP93TA exhibits hFE between 25 and 40 when tested at VCE = −10 V and IC = −10 mA, per onsemi's Electrical Characteristics table. This range reflects production binning and ensures predictable base drive calculation across units. At lower currents (IC = −1 mA), hFE remains ≥25, supporting reliable operation in high-impedance bias networks.

Does KSP93TA meet RoHS and environmental compliance standards?

Yes, the KSP93TA is Pb-free, halogen-free/BFR-free, and beryllium-free, fully compliant with EU Directive 2011/65/EU (RoHS). This is explicitly stated in the "Features" section of the official onsemi datasheet (Rev. 1, August 2024), and confirmed by onsemi's material declarations and packaging documentation.

Can KSP93TA be used in linear amplification applications?

Yes, the KSP93TA supports linear operation with verified hFE stability across IC = −1 mA to −30 mA at VCE = −10 V, and low saturation voltages (VCE(sat) ≤ −0.50 V, VBE(sat) ≤ −0.90 V). Its fT = 50 MHz and Cob ≤ 6 pF make it suitable for audio-frequency amplifiers and precision current sources where high-voltage swing and low distortion are required.