onsemi KSA1010Y

Overview

KSA1010Y from onsemi is a PNP epitaxial silicon transistor designed for high-speed, high-voltage switching in industrial power control circuits. It features −100 V V_CEO, −7 A DC collector current, 40 W collector dissipation at T_C = 25°C, and <0.6 V V_CE(sat) at −5 A/−0.5 A, enabling robust operation in relay drivers and SMPS output stages.

For engineers reviewing the KSA1010Y datasheet, pinout, applications, or equivalent options, key selection considerations include its TO-220-3LD package, h_FE grade Y (100–200 at −3 A), −100 V sustaining voltage under clamped inductive switching, and verified safe operating area up to 100 ms pulse width.

Technical Context

This device operates as a high-voltage PNP switch with fast turn-on (<0.5 µs), storage (<1.5 µs), and fall (<0.5 µs) times under −50 V/−5 A conditions. Its clamped inductive switching capability supports V_CEX(sus)1 = −100 V with V_BE(off) = 5 V and L = 180 µH, meeting industrial snubberless relay and solenoid drive requirements.

The KSA1010Y exhibits graded h_FE (Y = 100–200 at −3 A), low leakage (I_CEO ≤ −1 mA at 125°C), and thermal derating to zero power at T_C = 175°C - all validated per onsemi's Rev. 2 (Nov. 2023) datasheet.

Key Specifications

Pinout & Package

Package: TO-220-3LD (Case 340AT), isolated tab, vertical mounting, Pb-free compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with KSA1010OTU and MJD127G, the KSA1010Y delivers superior h_FE consistency for predictable base drive and higher case-mounted thermal capacity - making it optimal for thermally demanding, volume-manufactured industrial controls where reliability and drive simplicity are critical.

Availability

KSA1010Y is available at Aetrix Electronics and suitable for industrial relay drivers, SMPS output switches, motor commutation circuits, and solenoid actuation systems requiring stable component supply across multi-year production cycles.

Supply support for KSA1010Y 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 specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The KSA1010Y belongs to onsemi's high-voltage bipolar transistor product line, engineered specifically for ruggedized industrial switching applications where reliability under repetitive inductive stress and thermal cycling is mandatory.

FAQ

What is the maximum continuous collector current rating for the KSA1010Y?

The KSA1010Y has a maximum DC collector current (I_C) rating of −7 A at T_C = 25°C, as specified in the Absolute Maximum Ratings table. This rating assumes proper heatsinking and derates linearly with increasing case temperature - dropping to zero at T_C = 175°C. For pulsed operation, I_CP reaches −15 A under defined conditions (PW ≤ 300 µs, duty cycle ≤ 10%). The KSA1010Y must be operated within these limits to ensure long-term reliability and avoid junction overheating.

Does the KSA1010Y support clamped inductive switching, and what are the test conditions?

Yes, the KSA1010Y is explicitly characterized for clamped inductive switching with V_CEX(sus)1 = −100 V at I_C = −5 A, I_B1 = −I_B2 = −0.5 A, V_BE(off) = 5 V, L = 180 µH, and clamped configuration. This rating confirms its suitability for relay and solenoid drive without external snubbers. The KSA1010Y datasheet validates this performance under standardized test conditions, ensuring repeatable behavior in real-world inductive load switching.

What does the 'Y' suffix in KSA1010Y indicate, and how does it affect circuit design?

The 'Y' suffix denotes the h_FE gain grade: 100–200 at V_CE = −5 V and I_C = −3 A. This tight binning reduces variation in base drive requirements across production lots, allowing more deterministic resistor selection and minimizing overdesign of driver stages. When designing with the KSA1010Y, engineers can rely on consistent saturation behavior at −5 A with −0.5 A base current, unlike ungraded or lower-grade variants such as KSA1010OTU.

Can the KSA1010Y be used in surface-mount applications?

No, the KSA1010Y is packaged exclusively in the through-hole TO-220-3LD (Case 340AT) outline and is not offered in surface-mount variants. Its thermal performance depends on mechanical mounting to a heatsink via the isolated tab. For SMT implementations, alternatives like the MJD127G (TO-263) may be considered, though they differ in thermal rating, SOA, and clamping capability. The KSA1010Y must be mounted using standard TO-220 hardware and thermal interface materials to achieve its rated 40 W dissipation.

How does the KSA1010Y compare to its complementary NPN counterpart KSC2334?

The KSA1010Y (PNP) and KSC2334 (NPN) share matched voltage ratings (−100 V / +100 V), current capability (−7 A / +7 A), and switching speed profiles, enabling balanced push-pull or H-bridge designs. Their complementary characteristics - including similar V_CE(sat), h_FE ranges, and SOA curves - simplify dual-transistor layout and drive circuitry. The KSA1010Y serves as the designated PNP match to the KSC2334 per onsemi's documentation, ensuring timing and thermal symmetry in bidirectional industrial power stages.