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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi SS9012GTA

Name: SS9012GTA
Brand: onsemi
SKU: SS9012GTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SS9012GTA

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Datasheet:: SS9012GTA.pdf

Description:: TRANS PNP 20V 0.5A TO-92-3

Quantity:: RFQ Add To RFQ list

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Inventory:4,744

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Product details

Overview

SS9012GTA from ON Semiconductor is a PNP epitaxial silicon transistor in TO-92 package, rated for −20 V V_CEO, −500 mA I_C, 625 mW power dissipation, and h_FE of 64–202 (Class G). It serves as a medium-power switching or linear amplification device in portable audio output stages.

For engineers reviewing the SS9012GTA datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, TO-92 mechanical compatibility, guaranteed h_FE classification (G), V_CE(sat) ≤ −0.6 V at I_C = −500 mA, and complementary pairing with SS9013 NPN devices.

Technical Context

The SS9012GTA operates as a general-purpose PNP bipolar junction transistor optimized for Class B push-pull amplifier output stages in portable radios. Its design emphasizes high DC current gain linearity across collector currents from −10 mA to −500 mA and low saturation voltage under heavy base drive.

It features fixed three-terminal topology (Emitter–Base–Collector), junction temperature rating up to 150°C, and storage range from −55°C to +150°C. Absolute maximum ratings are defined at T_A = 25°C unless otherwise specified, with breakdown voltages strictly limited to −40 V (V_CBO), −20 V (V_CEO), and −5 V (V_EBO).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−20 V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration.
I_C	−500 mA - Continuous collector current handling capacity without thermal derating at 25°C ambient.
P_C	625 mW - Total power dissipation limit at T_A = 25°C; requires heatsinking or derating above 25°C.
h_FE (Class G)	112–166 - Guaranteed DC current gain range at V_CE = −1 V, I_C = −50 mA; enables predictable biasing in amplifier designs.
V_CE(sat)	−0.18 to −0.6 V - Confirmed saturation voltage at I_C = −500 mA, I_B = −50 mA; ensures low conduction loss in switching use.
Package	TO-92 - Standard through-hole plastic package with 1–2–3 pinout (Emitter–Base–Collector); compatible with legacy PCB footprints.

Pinout & Package

SS9012GTA uses the industry-standard TO-92 package with lead configuration: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector. The package is axial-leaded, epoxy-molded, and rated for manual or wave soldering per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal in PNP operation	Connected to higher potential rail (e.g., V_CC) in common-emitter switch; defines reference for base drive polarity.
2 (Base)	Control input for minority-carrier injection	Receives negative-going current to turn on; requires external current-limiting resistor for safe drive.
3 (Collector)	Output current source terminal	Delivers controlled current to load; reverse-biased relative to emitter during cutoff; tied to load return path in amplifier output stage.

Key Features

Feature	Design Value
Complementary pairing	Explicitly designed as PNP counterpart to SS9013 NPN transistor, enabling matched push-pull amplifier topologies.
h_FE linearity	Demonstrated stable DC current gain across I_C = −10 mA to −500 mA (Fig. 2), reducing distortion in analog amplification.
High power capability	625 mW total dissipation supports 1 W-class audio output in Class B operation with proper heat management.
Low V_BE(sat)	−0.95 to −1.2 V at I_C = −500 mA confirms robust base drive efficiency and reduced driver-stage loading.

Applications

Portable Radio Output Stage	DC Motor Driver (Small)
Use Scenario: Final push-pull output stage in battery-powered AM/FM portable radios delivering ~1 W into 8 Ω speaker load. IC Role / Device Role / Timing Role: PNP half of complementary Class B amplifier pair; handles negative half-cycle current delivery. Use Value: SS9012GTA's −500 mA I_C and 625 mW P_C enable full-swing audio output without thermal shutdown in compact enclosures.	Use Scenario: Low-voltage bidirectional H-bridge driver for 3–6 V brushed DC motors in toys or small actuators. IC Role / Device Role / Timing Role: High-side PNP switch controlling motor supply connection; paired with N-channel or NPN low-side switches. Use Value: SS9012GTA's −20 V V_CEO and −0.6 V V_CE(sat) ensure reliable commutation and minimal conduction loss at 5 V operation.
LED Current Regulator	Level-Shifting Interface
Use Scenario: Constant-current sink for high-brightness indicator LEDs in industrial control panels operating from 5–12 V rails. IC Role / Device Role / Timing Role: Linear current-regulating transistor with emitter-resistor feedback; base driven by microcontroller GPIO. Use Value: SS9012GTA's tight h_FE classification (G) and low V_CE(sat) allow accurate ±5% LED current setting without active feedback.	Use Scenario: Logic-level translation between 3.3 V MCU outputs and 5 V peripheral inputs requiring inverted signal polarity. IC Role / Device Role / Timing Role: Active-low open-collector interface using emitter-follower or common-emitter inversion. Use Value: SS9012GTA's −5 V V_EBO and fast turn-off support clean 3.3 V → 5 V level shift with <100 ns propagation delay.

Portable Radio Output Stage

DC Motor Driver (Small)

Use Scenario: Final push-pull output stage in battery-powered AM/FM portable radios delivering ~1 W into 8 Ω speaker load.

IC Role / Device Role / Timing Role: PNP half of complementary Class B amplifier pair; handles negative half-cycle current delivery.

Use Value: SS9012GTA's −500 mA I_C and 625 mW P_C enable full-swing audio output without thermal shutdown in compact enclosures.

Use Scenario: Low-voltage bidirectional H-bridge driver for 3–6 V brushed DC motors in toys or small actuators.

IC Role / Device Role / Timing Role: High-side PNP switch controlling motor supply connection; paired with N-channel or NPN low-side switches.

Use Value: SS9012GTA's −20 V V_CEO and −0.6 V V_CE(sat) ensure reliable commutation and minimal conduction loss at 5 V operation.

LED Current Regulator

Level-Shifting Interface

Use Scenario: Constant-current sink for high-brightness indicator LEDs in industrial control panels operating from 5–12 V rails.

IC Role / Device Role / Timing Role: Linear current-regulating transistor with emitter-resistor feedback; base driven by microcontroller GPIO.

Use Value: SS9012GTA's tight h_FE classification (G) and low V_CE(sat) allow accurate ±5% LED current setting without active feedback.

Use Scenario: Logic-level translation between 3.3 V MCU outputs and 5 V peripheral inputs requiring inverted signal polarity.

IC Role / Device Role / Timing Role: Active-low open-collector interface using emitter-follower or common-emitter inversion.

Use Value: SS9012GTA's −5 V V_EBO and fast turn-off support clean 3.3 V → 5 V level shift with <100 ns propagation delay.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC557B	Higher h_FE (200–450), lower I_C (−100 mA), same TO-92 package	Not suitable for >−200 mA loads; better for signal amplification than power switching	Select BC557B only when gain stability at low current (<−50 mA) is critical and power demand is minimal.
MPSA92	Higher V_CEO (−300 V), same I_C (−500 mA), TO-92 but different pinout (E-C-B)	Designed for high-voltage switching (e.g., CRT deflection), not audio output; pinout mismatch requires PCB redesign	Choose MPSA92 only for HV PNP switching; avoid in SS9012GTA-replacement scenarios due to non-interchangeable pinout.

Compared with BC557B and MPSA92, SS9012GTA uniquely balances medium-voltage PNP switching (−20 V), high current (−500 mA), and Class-G h_FE linearity-making it optimal for cost-sensitive, space-constrained portable audio and DC load control where complementary NPN pairing (SS9013) is required.

Availability

SS9012GTA is available at Aetrix Electronics and suitable for portable radio output stages, small DC motor drivers, LED current regulation, and logic-level shifting applications requiring stable component supply and long-term obsolescence management.

Supply support for SS9012GTA 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, sensor, and logic solutions for automotive, industrial, cloud computing, and consumer markets.

The SS9012GTA belongs to ON Semiconductor's general-purpose bipolar transistor product line, originally developed by Fairchild Semiconductor for cost-effective, high-reliability discrete amplification and switching in battery-powered consumer electronics.

FAQ

What is the pin configuration of the SS9012GTA?

The SS9012GTA uses a standard TO-92 package with pin 1 = Emitter, pin 2 = Base, and pin 3 = Collector. This configuration is confirmed in the official ON Semiconductor datasheet Rev. A4 and matches legacy Fairchild documentation. Always verify orientation via the flat side and lead spacing before PCB layout or assembly.

Is SS9012GTA a direct replacement for SS9012?

Yes, SS9012GTA is the updated ON Semiconductor part number for the original Fairchild SS9012, with "GTA" indicating Class G h_FE (112–166) and tape-and-reel packaging. Electrical specifications, package dimensions, and pinout are identical-no design changes are needed when migrating from SS9012 to SS9012GTA.

What does the 'G' in SS9012GTA signify?

The 'G' in SS9012GTA denotes the h_FE classification band: 112–166 at V_CE = −1 V and I_C = −50 mA. This grading ensures consistent current gain performance across production lots, critical for matched-pair amplifier designs and predictable biasing in production hardware.

Can SS9012GTA be used in place of an NPN transistor like SS9013?

No-SS9012GTA is a PNP transistor and cannot substitute for the NPN SS9013 without circuit redesign. However, they are complementary devices: SS9012GTA (PNP) and SS9013 (NPN) are intentionally matched for push-pull amplifier stages, sharing identical package, voltage/current ratings, and thermal characteristics.

What is the maximum operating temperature for SS9012GTA?

The SS9012GTA has a maximum junction temperature (T_J) of 150°C and a storage temperature range of −55°C to +150°C. For continuous operation at full 625 mW dissipation, ambient temperature must remain ≤25°C unless heatsinking or forced airflow is applied per the thermal resistance curve in the datasheet.

SS9012GTA Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 20 V

Vce Saturation (Max) @ Ib, Ic:: 600mV @ 50mA, 500mA

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 112 @ 50mA, 1V

Power - Max:: 625 mW

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

SS9012GTA FAQ

1.How can I place an order for SS9012GTA through Aetrix?

Please submit a Request for Quotation (RFQ) for SS9012GTA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SS9012GTA reliable?

The price and inventory of SS9012GTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS9012GTA is usually 5 days.

3.What payment methods are accepted for SS9012GTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS9012GTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SS9012GTA?

SS9012GTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SS9012GTA order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SS9012GTA?

For technical support, including SS9012GTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS9012GTA requirements.

6.How does Aetrix verify that SS9012GTA is sourced from the original manufacturer or authorized distributors?

All SS9012GTA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SS9012GTA meets industry standards.

7.What is the process for return or replacement of SS9012GTA?

All SS9012GTA units undergo pre-shipment inspection (PSI). If there is an issue with SS9012GTA, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SS9012GTA part is unused and in its original packaging.

Return procedure for SS9012GTA:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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