onsemi SS9013HTA

Overview

SS9013HTA 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 features V_CEO = 20 V, I_C = 500 mA, P_C = 625 mW, h_FE up to 202 (Class H), and TO-92 package - used in Class B push-pull output stages of portable radios.

For engineers reviewing the SS9013HTA datasheet, pinout, applications, or equivalent options, key selection criteria include DC current gain linearity at 50–500 mA, V_CE(sat) ≤ 0.6 V at I_C = 500 mA / I_B = 50 mA, complementary pairing with SS9012, and operation within T_J ≤ 150°C.

Technical Context

The SS9013HTA operates as a general-purpose NPN bipolar junction transistor optimized for linear amplification and saturated switching. Its h_FE classification (H: 144–202) ensures predictable gain across I_C = 50 mA to 500 mA at V_CE = 1 V, with excellent linearity confirmed in Figure 2 of the datasheet.

It exhibits low saturation voltages - V_CE(sat) ≤ 0.6 V and V_BE(sat) ≤ 1.2 V under I_C = 500 mA / I_B = 50 mA - enabling efficient Class B push-pull output stages. Complementary pairing with the PNP SS9012 allows matched thermal and gain behavior in quasi-complementary amplifier designs.

Key Specifications

Pinout & Package

SS9013HTA is housed in a standard TO-92 plastic package with 3 leads: Emitter (Pin 1), Base (Pin 2), Collector (Pin 3), oriented with flat side facing viewer and leads downward.

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, SS9013HTA delivers optimal balance of medium-current drive (500 mA), guaranteed high-linearity h_FE at operational currents, and native complementary pairing - making it preferred for cost-sensitive, thermally constrained Class B audio outputs and quasi-complementary designs.

Availability

SS9013HTA is available at Aetrix Electronics and suitable for portable audio amplifiers, low-voltage motor controls, LED drivers, and logic-level translation circuits requiring stable component supply and long-term manufacturability.

Supply support for SS9013HTA 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 SS9013HTA belongs to Fairchild's legacy general-purpose transistor family, engineered for cost-effective, reliable amplification and switching in consumer audio, instrumentation, and industrial control systems.

FAQ

What is the pin configuration of the SS9013HTA?

The SS9013HTA uses a standard TO-92 package with Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector - verified in the official Fairchild SS9013 Rev. A4 datasheet, Figure "Package Dimensions". This configuration is consistent across all SS9013 variants including SS9013HTA and is essential for correct PCB layout and functional circuit operation.

Is SS9013HTA suitable for switching applications?

Yes, SS9013HTA is qualified for switching use with V_CE(sat) ≤ 0.6 V at I_C = 500 mA / I_B = 50 mA and f_T ≥ 10 MHz. Its guaranteed h_FE (144–202) ensures robust saturation with moderate base drive, making SS9013HTA appropriate for low-frequency (<100 kHz) digital switching and PWM-driven loads like small relays or LEDs.

What does the 'HTA' suffix indicate in SS9013HTA?

The 'HTA' suffix denotes a specific Fairchild manufacturing variant: 'H' indicates h_FE Class H (144–202), 'T' confirms TO-92 packaging, and 'A' refers to revision-level traceability and test screening per Fairchild's internal qualification standards. SS9013HTA is not a different die - it is the fully specified, binned version of the SS9013 transistor meeting tight gain and saturation performance criteria.

Can SS9013HTA replace BC548 in existing designs?

SS9013HTA can functionally replace BC548 in many low-to-medium current applications, but caution is required: BC548 has lower I_C (100 mA) and P_C (500 mW), while SS9013HTA supports 500 mA / 625 mW. If the original BC548 design operates near its limits, SS9013HTA offers headroom - however, verify base drive compatibility, as SS9013HTA's h_FE profile differs at high currents.

Does SS9013HTA have a complementary PNP part?

Yes, SS9013HTA is explicitly designed to pair with the PNP SS9012 transistor. The datasheet states "Complementary to SS9012", and both share matching h_FE classifications, thermal coefficients, and TO-92 packaging - enabling balanced quasi-complementary output stages in audio amplifiers without external matching components.