onsemi KSA1010OTU

Overview

KSA1010OTU from onsemi is a PNP epitaxial silicon transistor designed for high-speed, high-voltage switching in industrial power circuits. It supports −100 V collector-emitter sustaining voltage, −7 A DC collector current, and 40 W collector dissipation at TC = 25°C, with turn-on time ≤0.5 µs and fall time ≤0.5 µs. It serves as a complement to KSC2334 in push-pull or H-bridge motor drive stages.

For engineers reviewing the KSA1010OTU datasheet, pinout, applications, or equivalent options, key selection criteria include its −100 V VCEO(sus), −5 A IC saturation capability with −0.6 V VCE(sat), TO-220-3LD package thermal performance, and hFE classification (O-grade: 60–120 at IC = −3 A).

Technical Context

This device operates as a high-voltage PNP switching transistor with rugged safe operating area (SOA) up to 100 V and 10 A pulsed, validated under inductive load conditions (L = 1 mH and L = 180 µH). Its clamped VCEX(sus) ratings confirm robustness against inductive kickback during turn-off.

The KSA1010OTU features graded hFE (O-class: 60–120 at IC = −3 A), low VBE(sat) of ≤−1.5 V at IC = −5 A/IB = −0.5 A, and fast switching (tON/tF ≤0.5 µs), enabling efficient operation in hard-switched SMPS and solid-state relay drivers.

Key Specifications

Pinout & Package

Package: TO-220-3LD (Case 340AT), lead-free, with electrically isolated collector tab. Mounting requires insulating washer when heatsink is grounded.

Key Features

Applications

Equivalent & Alternatives

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

Compared with KSA1010OTU, MJD127G offers higher current but reduced thermal headroom and non-isolated packaging, while KSA992F trades 2 A of DC current for +20 V voltage margin and ungraded hFE - making KSA1010OTU optimal for thermally demanding, precision-gain industrial switching.

Availability

KSA1010OTU is available at Aetrix Electronics and suitable for industrial motor drives, switched-mode power supplies, solid-state relays, and power sequencers requiring stable component supply and long-term production continuity.

Supply support for KSA1010OTU 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, sensing, and connectivity solutions for automotive, industrial, cloud, and IoT applications.

The KSA1010OTU belongs to onsemi's high-voltage bipolar transistor product line, engineered specifically for ruggedized industrial switching where reliability under inductive stress and thermal stability are critical.

FAQ

What is the hFE grade of KSA1010OTU and how is it marked?

The "O" in KSA1010OTU denotes the hFE grade classification per onsemi's marking standard: O-grade specifies DC current gain between 60 and 120 at VCE = −5 V and IC = −3 A. This grade is laser-marked on the device body as part of the "A1010−O" code, ensuring traceability and design consistency for base drive calculations in KSA1010OTU applications.

Is KSA1010OTU pin-compatible with KSA1010YTU?

Yes - KSA1010OTU and KSA1010YTU share identical TO-220-3LD (Case 340AT) packaging, pinout (Base–Collector–Emitter), and mechanical footprint. The only difference is hFE grading: "O" (60–120) vs. "Y" (100–200). No PCB layout change is required when substituting between these variants, though base drive must be verified for the selected hFE range in KSA1010OTU.

Does KSA1010OTU support inductive load switching with clamped turn-off?

Yes - KSA1010OTU is characterized for clamped inductive switching per VCEX(sus) tests: −100 V at IC = −5 A with IB1 = −IB2 = −0.5 A and VBE(off) = 5 V, using L = 180 µH. This confirms its suitability for relay replacement and motor drive snubberless designs where KSA1010OTU absorbs stored inductive energy safely.

What is the maximum allowable case temperature for continuous operation of KSA1010OTU?

KSA1010OTU has a maximum junction temperature of +150°C and a power derating curve starting at TC = 25°C. At TC = 100°C, its usable collector dissipation drops to ~16 W. For continuous operation, maintain TC ≤ 95°C to retain ≥20 W of safe dissipation - achievable with a 1.5°C/W heatsink and forced airflow, as validated in KSA1010OTU thermal characterization data.

How does KSA1010OTU compare to its NPN complement KSC2334 in switching performance?

KSA1010OTU (PNP) and KSC2334 (NPN) are matched for complementary use in push-pull or H-bridge configurations: both offer −100 V/+100 V VCEO, similar tON/tF (~0.5 µs), and compatible TO-220 packages. However, KSA1010OTU exhibits higher VCE(sat) (≤−0.6 V vs. ≤+0.5 V) and lower hFE spread, making KSA1010OTU best suited for high-side switching where base drive isolation is simpler than low-side NPN drive in high-dV/dt environments.