onsemi KSA1182OMTF

Overview

KSA1182OMTF from ON Semiconductor is a PNP epitaxial silicon transistor designed for low-frequency power amplifier applications, with V_CEO = −30 V, I_C = −500 mA, P_C = 150 mW, h_FE (O-grade) = 70–140 at −100 mA, and f_T = 200 MHz - commonly used in audio preamplifier stages and complementary switching circuits alongside KSC2859.

For engineers reviewing the KSA1182OMTF datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, SOT-23 package compatibility, guaranteed h_FE classification (O-grade), −30 V V_CEO rating, and −0.25 V V_CE(sat) at −100 mA/−10 mA drive - critical for low-loss linear amplification and saturated switching in space-constrained designs.

Technical Context

The KSA1182OMTF operates as a medium-power PNP bipolar junction transistor optimized for low-frequency analog amplification and switching. Its O-grade h_FE bin (70–140) ensures predictable DC gain stability at I_C = −100 mA and V_CE = −1 V, while its 200 MHz f_T supports bandwidth-limited audio and control signal handling without RF instability.

Designed for complementary pairing with NPN KSC2859, it shares matched thermal characteristics and SOT-23 footprint, enabling balanced push-pull configurations. The device features low V_CE(sat) (−0.25 V max) and moderate Cob (13 pF), supporting efficient operation in Class-A and Class-AB amplifier topologies with minimal Miller effect.

Key Specifications

Pinout & Package

Package: SOT-23 (3-pin, surface-mount plastic package per JEDEC TO-236AB); compact footprint (2.90 × 1.30 × 1.00 mm) suitable for high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBT4403 and BC807-40, the KSA1182OMTF offers uniquely guaranteed O-grade h_FE (70–140) and optimized low-frequency linearity - making it preferable for audio preamplifier and matched complementary amplifier designs where gain consistency and thermal tracking matter more than raw voltage or power ratings.

Availability

KSA1182OMTF is available at Aetrix Electronics and suitable for audio preamplifier stages, DC motor driver switches, and complementary push-pull output circuits requiring stable component supply, consistent h_FE binning, and SOT-23 footprint compatibility.

Supply support for KSA1182OMTF 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, and sensor solutions for automotive, industrial, and consumer markets.

The KSA1182OMTF belongs to ON Semiconductor's legacy Fairchild discrete transistor portfolio, engineered specifically for low-frequency linear amplification and complementary switching - emphasizing gain consistency, thermal matching, and SOT-23 reliability in cost-sensitive analog systems.

FAQ

What is the pin configuration of the KSA1182OMTF?

The KSA1182OMTF uses a standard SOT-23 package with pin 1 as Base, pin 2 as Emitter, and pin 3 as Collector. This configuration is confirmed in the official ON Semiconductor datasheet Rev. A2 and matches JEDEC TO-236AB mechanical drawings. The KSA1182OMTF must be mounted with correct orientation to avoid reverse-bias damage during operation.

What does the 'O' in KSA1182OMTF signify?

The 'O' in KSA1182OMTF denotes the h_FE classification grade - specifically a DC current gain range of 70–140 at V_CE = −1 V and I_C = −100 mA. This binning ensures predictable bias point behavior across production units, and the full designation KSA1182OMTF reflects both the O-grade and tape-and-reel packaging format.

Is the KSA1182OMTF a direct replacement for the KSA1182YMTF?

No - the KSA1182OMTF and KSA1182YMTF differ in h_FE grading: O-grade (70–140) versus Y-grade (120–240). While both share identical package, voltage/current ratings, and pinout, substituting them without circuit revalidation risks gain-dependent instability or bias shift. The KSA1182OMTF is not interchangeable with KSA1182YMTF unless the design accommodates the lower h_FE range.

What is the maximum operating temperature for the KSA1182OMTF?

The KSA1182OMTF has a maximum junction temperature (T_J) of 150°C and a storage temperature range of −55°C to +150°C. Derating is required above 25°C ambient: power dissipation decreases linearly to zero at 150°C case temperature. Thermal design must account for the SOT-23 package's thermal resistance to ensure the KSA1182OMTF remains within safe operating limits.

How does the KSA1182OMTF compare to the KSC2859 in circuit design?

The KSA1182OMTF is the designated PNP complement to the NPN KSC2859, sharing SOT-23 packaging, matched thermal coefficients, and compatible voltage/current ratings. In push-pull or differential pair designs, the KSA1182OMTF provides symmetrical sourcing capability where the KSC2859 handles sinking - enabling low-distortion linear operation. Their coordinated specification ensures predictable performance when used together as the KSA1182OMTF/KSC2859 pair.