onsemi KSP06BU

Overview

KSP06BU from ON Semiconductor is an NPN epitaxial silicon transistor in TO-92 package, rated for 80 V collector-emitter voltage, 500 mA collector current, and 625 mW power dissipation. It delivers DC current gain ≥50 at IC = 10–100 mA and features 100 MHz current gain bandwidth product, suited for general-purpose switching and amplification in low-voltage consumer and industrial control circuits.

For engineers reviewing the KSP06BU datasheet, pinout, applications, or equivalent options, key selection criteria include its 80 V V_CEO, TO-92 mechanical compatibility, h_FE stability across 10–100 mA, V_CE(sat) ≤ 0.25 V at 100 mA/10 mA drive, and suitability for discrete amplifier stages or relay driver interfaces.

Technical Context

The KSP06BU operates as a medium-voltage, medium-current NPN bipolar junction transistor with epitaxial base construction enabling stable h_FE and high f_T. Its 80 V V_CEO rating supports use in 24–48 V supply rails, while 0.25 V saturation voltage ensures efficient switching in low-side load control.

Designed for linear and saturated-mode operation, it exhibits 4 V V_EBO, 0.1 μA I_CEO at 60 V, and junction temperature capability up to 150°C - confirming robustness in ambient-temperature-variable environments without forced cooling.

Key Specifications

Pinout & Package

Package: TO-92, 3-lead, through-hole, JEDEC-compliant molded plastic case with straight or bent leads (bulk packing). Dimensions per Figure 5 in Rev. 1.4 datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPSA42 and BC547B, the KSP06BU occupies a balanced niche: its 80 V rating exceeds BC547B's limit while offering better h_FE and lower V_CE(sat) than MPSA42, making it optimal for 24–48 V switching where gain consistency and conduction efficiency both matter.

Availability

KSP06BU is available at Aetrix Electronics and suitable for relay drivers, LED current boosters, DC motor controls, and audio preamplifiers requiring stable component supply and long-term industrial availability.

Supply support for KSP06BU 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 and signal management solutions, with roots in Fairchild Semiconductor's legacy discrete and analog portfolio.

The KSP06BU belongs to ON Semiconductor's general-purpose bipolar transistor product line, designed for cost-sensitive, high-reliability discrete switching and amplification in industrial, consumer, and automotive-qualified (non-safety-critical) applications.

FAQ

What is the maximum collector-emitter voltage rating for KSP06BU?

The KSP06BU has a maximum collector-emitter voltage (V_CEO) rating of 80 V at T_A = 25°C. This rating is confirmed in the Absolute Maximum Ratings table of the official datasheet (Rev. 1.4). Exceeding this voltage risks avalanche breakdown. Derating is recommended above 25°C ambient per the datasheet's thermal curves. The KSP06BU must not be used in circuits where transient spikes exceed 80 V without clamping protection.

Does KSP06BU have a documented pinout configuration for TO-92 package?

Yes, the KSP06BU uses standard TO-92 pinout: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector, with lead orientation matching JEDEC TO-92 straight-lead configuration (flat side facing viewer, leads down, left-to-right = 1–2–3). This is explicitly shown in Figure 5 of the KSP05/KSP06 Rev. 1.4 datasheet and verified across ON Semiconductor's packaging documentation for bulk-packed variants like KSP06BU.

What is the typical DC current gain (h_FE) of KSP06BU at 100 mA collector current?

The KSP06BU guarantees h_FE ≥50 at V_CE = 1 V and I_C = 100 mA, per the Electrical Characteristics table in the datasheet. Measured typical values range from 70–120 under those conditions, but design must use the minimum 50 for worst-case bias calculations. This gain holds across the full operating temperature range (−55°C to +150°C), supporting robust circuit performance in uncontrolled environments.

Can KSP06BU replace KSP05TA in existing designs?

The KSP06BU can replace KSP05TA only if the application requires ≥80 V V_CEO and tolerates identical package and pinout. While both share TO-92 packaging and pinout, KSP06BU's 80 V rating exceeds KSP05TA's 60 V - providing extra margin - but its h_FE and V_CE(sat) specs match closely. No PCB changes are needed, but verify voltage stress margins and thermal rise under max load before substitution.

What is the maximum power dissipation of KSP06BU and how is it thermally managed?

The KSP06BU has a maximum collector power dissipation (P_C) of 625 mW at T_A = 25°C. This value decreases linearly above 25°C at 5 mW/°C (per datasheet derating curve). In practice, the TO-92 package achieves ~300 mW continuous dissipation on standard FR-4 PCB with 1 cm² copper pour. For sustained 500 mW operation, external heatsinking or airflow is required. Thermal design must reference the KSP06BU's 150°C maximum junction temperature.