onsemi KSA1013OTA

Overview

KSA1013OTA from onsemi is a PNP epitaxial silicon transistor designed for high-voltage switching and linear amplification in vertical deflection and audio output stages of color TV systems. It features −160 V collector-emitter breakdown voltage (BV_CEO), −1 A continuous collector current (I_C), 900 mW power dissipation, and DC current gain (h_FE) ranging from 60 to 320 at −200 mA. Its TO-92 3 (Case 135AM) package supports compact CRT display driver designs.

For engineers reviewing the KSA1013OTA datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, −160 V V_CEO rating, TO-92 leadformed mechanical compatibility, h_FE classification bands (R/O/Y), and safe operating area performance under pulsed vertical deflection loads.

Technical Context

This device operates in common-emitter configuration with emitter-common biasing. Its −160 V V_CBO and V_CEO ratings enable direct use in CRT vertical output stage flyback circuits where high reverse voltage tolerance is mandatory. The 15–50 MHz f_T supports stable gain at horizontal sync harmonics without oscillation.

Thermal design relies on its 139 °C/W R_JA (FR-4 PCB, 76 mm × 114 mm), and derating begins above 25 °C at 7.2 mW/°C. Saturation behavior is characterized at I_C = −500 mA / I_B = −50 mA, yielding V_CE(sat) ≤ −1.5 V - critical for low-loss switching in deflection yoke drive.

Key Specifications

Pinout & Package

Package: TO-92 3 (Case 135AM), leadformed, Pb-free, 8.0 mm × 4.9 mm body with standardized pin spacing. Compatible with automated insertion and wave soldering per JEDEC TO-92 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with KSA1013OTA, KSA992FTA offers reduced voltage headroom but higher minimum h_FE, while 2SA1013 delivers identical performance with second-source assurance-making it ideal for long-lifecycle CRT repair programs requiring supply continuity.

Availability

KSA1013OTA is available at Aetrix Electronics and suitable for color TV vertical deflection output, CRT monitor power switching, and legacy audio amplifier applications requiring stable component supply across extended production lifecycles.

Supply support for KSA1013OTA 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 management, analog, sensing, and connectivity solutions for automotive, industrial, and consumer markets.

The KSA1013OTA belongs to onsemi's legacy bipolar power transistor product line, engineered specifically for high-reliability analog video system repair, CRT-based display maintenance, and industrial equipment retrofits where long-term component availability is critical.

FAQ

What is the maximum collector-emitter voltage rating for KSA1013OTA?

The KSA1013OTA has a guaranteed minimum collector-emitter breakdown voltage (BV_CEO) of −160 V at I_C = −10 mA and I_B = 0. This rating is validated per onsemi's absolute maximum ratings table and applies under standard test conditions. Designers must maintain at least 20% voltage margin in vertical deflection circuits to accommodate flyback transients. The KSA1013OTA achieves this margin consistently across all h_FE bins (R/O/Y).

Is KSA1013OTA compatible with TO-92 socketed replacements in CRT service manuals?

Yes, KSA1013OTA uses the TO-92 3 package (Case 135AM) with leadformed 8.0 mm × 4.9 mm dimensions and standardized pin 1–2–3 emitter-collector-base orientation. It matches mechanical outlines specified in service manuals for devices like 2SA1013 and KSA992, enabling direct socket replacement without board modification. Pinout validation confirms emitter (pin 1), collector (pin 2), base (pin 3) alignment per onsemi's marking diagram.

What h_FE bin does KSA1013OTA fall into, and how is it marked?

KSA1013OTA is factory-sorted into one of three h_FE classifications: R (60–120), O (100–200), or Y (160–320). The bin code appears in the marking - for example, "AA1013YWW" indicates Y-bin. Marking follows onsemi's standard: "AA1013" + year-week code + h_FE letter. Each KSA1013OTA unit shipped carries this visible bin identifier, allowing bias-critical designs to select matched units.

Can KSA1013OTA be used in linear amplifier configurations, or is it limited to switching?

KSA1013OTA supports both linear and switching operation. Its f_T of 15–50 MHz and low V_CE(sat) (≤−1.5 V) make it suitable for Class-A/B audio output stages, while its SOA curve (Figure 8) validates safe operation under pulsed vertical deflection loads. Linear use requires heatsinking above 300 mW dissipation; switching use benefits from its fast turn-off due to low C_ob (≤35 pF). The KSA1013OTA data sheet explicitly lists both color TV audio and vertical deflection as primary applications.

Does KSA1013OTA meet RoHS and Pb-free requirements?

Yes, KSA1013OTA is manufactured as a Pb-free device per onsemi's ordering information: "KSA1013YTA" denotes TO-92 3 LF (leadfree) packaging. It complies with EU RoHS Directive 2011/65/EU and JIS-C-0950. The device uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), eliminating need for baking prior to reflow. All KSA1013OTA units supplied by Aetrix Electronics carry full RoHS documentation and material declarations.