onsemi SS9013FTF

Overview

SS9013FTF from Fairchild Semiconductor is an NPN epitaxial silicon transistor designed for low-voltage, medium-current amplification and switching in portable audio and signal conditioning circuits. It delivers 500 mA collector current, 625 mW power dissipation, 20 V V_CEO, and h_FE of 64–202 (Class D–H), with TO-92 package compatibility.

For engineers reviewing the SS9013FTF datasheet, pinout, applications, or equivalent options, key selection considerations include its V_CE(sat) ≤ 0.6 V at I_C = 500 mA/I_B = 50 mA, h_FE linearity across 10–500 mA, and complementary pairing with SS9012 for push-pull amplifier stages.

Technical Context

This general-purpose NPN transistor operates in linear amplification and saturated switching modes. Its DC current gain (h_FE) is specified across two test conditions-64–202 at V_CE = 1 V, I_C = 50 mA and 40–120 at I_C = 500 mA-enabling stable biasing in Class B audio output stages and low-side load switches.

The device features low saturation voltages (V_CE(sat) ≤ 0.6 V, V_BE(sat) ≤ 1.2 V) and tight breakdown voltage ratings (BVCBO = 40 V, BVCEO = 20 V), supporting reliable operation in battery-powered consumer electronics where thermal margin and voltage headroom are constrained.

Key Specifications

Pinout & Package

SS9013FTF is housed in a standard TO-92 plastic package with 3-pin vertical lead configuration. Lead spacing matches JEDEC TO-92 outline (1.27 mm pitch, 3.60 mm body width).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC547C and MPSA13, SS9013FTF uniquely balances 500 mA current capability, sub-0.6 V saturation, and h_FE linearity-making it optimal for cost-sensitive, medium-power portable audio and motor control where thermal and voltage margins are tight.

Availability

SS9013FTF is available at Aetrix Electronics and suitable for portable audio amplifiers, DC motor drivers, LED current regulators, and signal-level translators requiring stable component supply and long-term manufacturability.

Supply support for SS9013FTF 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.

The SS9013FTF belongs to Fairchild's legacy general-purpose bipolar transistor family, engineered for cost-effective, robust amplification and switching in battery-operated consumer electronics.

FAQ

What is the maximum collector current rating for SS9013FTF?

The SS9013FTF has a maximum continuous collector current (I_C) rating of 500 mA at T_A = 25°C. Derating is required above 25°C ambient per the thermal resistance curve in the datasheet. This rating supports use in portable audio output stages and small DC motor drivers where peak load currents remain below this threshold. The SS9013FTF maintains stable h_FE performance up to 500 mA, confirming its suitability for medium-current linear and switching roles.

Is SS9013FTF pin-compatible with other TO-92 NPN transistors like BC547?

SS9013FTF uses the standard TO-92 package with E-B-C pinout (1–2–3), matching BC547, 2N3904, and most JEDEC-compliant TO-92 NPN transistors. However, electrical characteristics differ significantly: SS9013FTF supports 500 mA I_C versus BC547's 100 mA, and exhibits lower V_CE(sat) under heavy load. Substitution requires verification of current, gain, and saturation requirements in the target circuit. The SS9013FTF is not a drop-in replacement without design review.

What is the h_FE range for SS9013FTF, and how is it binned?

The SS9013FTF is binned into five h_FE classes (D–H) based on measurement at V_CE = 1 V and I_C = 50 mA: Class D = 64–91, E = 78–112, F = 96–135, G = 112–166, H = 144–202. This binning enables predictable bias design in production. The SS9013FTF datasheet confirms h_FE remains usable up to I_C = 500 mA, though minimum gain drops to 40 in that condition-critical for high-current switching validation.

Can SS9013FTF be used in a complementary pair with SS9012?

Yes, SS9013FTF is explicitly designed as the NPN complement to the SS9012 PNP transistor. Both share matched V_CEO (20 V), I_C (500 mA), and TO-92 packaging, enabling symmetrical Class B push-pull amplifier stages with minimized crossover distortion. The SS9013FTF and SS9012 exhibit closely aligned h_FE ranges and saturation characteristics, supporting balanced conduction in portable radio output stages as noted in the original Fairchild application note.

What is the junction-to-ambient thermal resistance (R_θJA) for SS9013FTF in TO-92?

The SS9013FTF datasheet does not specify R_θJA numerically, but its 625 mW power dissipation rating at T_A = 25°C implies an effective R_θJA of approximately 240°C/W for the standard TO-92 package on FR-4 board with minimal copper. Actual thermal performance depends on PCB layout-adding thermal relief pads or copper pours reduces R_θJA. For sustained 500 mA operation, derating curves in the SS9013FTF datasheet must be consulted to ensure T_J stays below 150°C.