My Inquiry
My Account
onsemi SS9012GTA-ON
- Part No.:
- SS9012GTA-ON
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
SS9012GTA-ON.pdf
- Description:
- TRANS PNP 20V 0.5A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:18,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SS9012GTA-ON from ON Semiconductor (formerly Fairchild) is a PNP epitaxial silicon transistor designed for low-voltage, medium-current switching and amplification in portable audio systems. It delivers −500 mA collector current, −20 V collector-emitter breakdown voltage, and 625 mW power dissipation in TO-92 package, commonly used in Class B push-pull output stages of portable radios.
For engineers reviewing the SS9012GTA-ON datasheet, pinout, applications, or equivalent options, key selection considerations include verified PNP polarity, guaranteed hFE range (64–202 at IC = −50 mA to −500 mA), saturation voltage performance (VCE(sat) ≤ −0.6 V at IC = −500 mA/IB = −50 mA), and TO-92 mechanical compatibility with legacy through-hole designs.
Technical Context
This discrete PNP bipolar junction transistor operates in linear and saturated switching modes, with DC current gain (hFE) specified across two test conditions: 64–202 at VCE = −1 V, IC = −50 mA and 40–90 at VCE = −1 V, IC = −500 mA. Its complementary pairing with SS9013 (NPN) enables balanced push-pull amplifier topologies.
Breakdown ratings are strictly defined: −40 V VCBO, −20 V VCEO, and −5 V VEBO, with leakage currents limited to −100 nA for both ICBO and IEBO. Junction temperature is rated to 150°C, supporting operation in compact, unventilated consumer enclosures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Transistor Type | PNP bipolar junction transistor - enables current sinking and high-side switch configurations |
| VCBO / VCEO / VEBO | −40 V / −20 V / −5 V - defines safe operating voltage limits for base-collector, collector-emitter, and emitter-base junctions |
| IC (max) | −500 mA - supports medium-power audio output stage and relay driver loads without external heat sinking |
| PC (max) | 625 mW - allows continuous operation at ambient temperatures up to 70°C in standard TO-92 mounting |
| VCE(sat) @ IC/IB | ≤ −0.6 V at IC = −500 mA, IB = −50 mA - ensures low conduction loss and minimal self-heating in saturated switching |
| hFE Range | 64–202 (Class G) - provides predictable DC gain for biasing stability in amplifier and switch applications |
Pinout & Package
SS9012GTA-ON is housed in a standard TO-92 plastic package with 3 leads. Lead identification follows JEDEC TO-92 outline: Emitter (Pin 1), Base (Pin 2), Collector (Pin 3), with flat side facing viewer and leads down.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current source terminal for PNP device | Connected to higher potential rail (e.g., VCC) in common-emitter switch configuration |
| 2 (Base) | Control input for minority-carrier injection | Receives forward-biased drive current (typically −10% of IC) to enable conduction |
| 3 (Collector) | Current sink terminal | Connected to load (e.g., speaker coil or relay coil) and returned to ground or lower potential |
Key Features
| Feature | Design Value |
|---|---|
| High hFE linearity | hFE maintains monotonic response across IC = −10 mA to −500 mA - simplifies bias network design in Class A/B amplifiers |
| Complementary pairing | Designed as PNP counterpart to SS9013 NPN - enables matched push-pull output stages with symmetrical drive capability |
| Low VCE(sat) | ≤ −0.6 V at rated IC/IB - reduces power loss and thermal stress in battery-powered portable radios |
| TO-92 mechanical standardization | JEDEC TO-92 outline with 1.27 mm lead pitch - ensures drop-in replacement compatibility with legacy through-hole PCB footprints |
Applications
| Portable Radio Output Stage | DC Motor Driver (Small) |
|---|---|
|
Use Scenario: Class B push-pull audio output amplifier in battery-powered AM/FM portable radios. IC Role / Device Role / Timing Role: PNP transistor providing half-cycle current sourcing in complementary pair with SS9013. Use Value: Delivers 1 W output power with <0.6 V saturation loss, extending battery life and minimizing thermal rise in compact enclosures. |
Use Scenario: Bidirectional control of small DC motors (<100 mA avg) in toys or handheld tools using H-bridge partial implementation. IC Role / Device Role / Timing Role: High-side PNP switch enabling current sourcing to motor terminals during forward rotation phase. Use Value: −500 mA rating and −20 V VCEO support motor stall conditions without secondary protection components. |
| Relay Driver Circuit | LED Current Sink Switch |
|
Use Scenario: Driving 5 V or 12 V electromagnetic relays in industrial control panels and appliance logic boards. IC Role / Device Role / Timing Role: Saturated PNP switch interfacing microcontroller GPIO to relay coil via base resistor network. Use Value: Verified −500 mA IC capability handles typical relay coil currents (40–120 mA) with >4× safety margin and stable hFE-based base drive calculation. |
Use Scenario: Constant-current sink for indicator LEDs or status backlighting in consumer electronics front panels. IC Role / Device Role / Timing Role: Linear-mode PNP current regulator with emitter-degenerated biasing for precise LED current control. Use Value: hFE linearity and −5 V VEBO rating allow robust base-emitter biasing without risk of reverse breakdown under transient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP general-purpose transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPSA92 | Higher VCEO (−300 V), lower hFE (25–250), TO-92 package | Better suited for high-voltage switching (e.g., CRT deflection, flyback drivers); over-specified for low-voltage audio use | Select when >−20 V collector-emitter blocking is required; not recommended for cost-sensitive portable audio due to premium pricing |
| BC557 | Lower IC (−100 mA), same TO-92, hFE 110–800 (varies by grade) | Optimized for signal amplification and low-current switching; insufficient for 500 mA load drive | Acceptable only in low-power bias networks or pre-driver stages - cannot replace SS9012GTA-ON in output stage roles |
Compared with MPSA92 and BC557, SS9012GTA-ON uniquely balances −500 mA current handling, −20 V VCEO, and TO-92 form factor for cost-sensitive, medium-power portable audio and relay interface applications - neither alternative matches this specific combination of rating and footprint.
Availability
SS9012GTA-ON is available at Aetrix Electronics and suitable for portable radio output stages, relay driver circuits, and small DC motor control applications requiring stable component supply and long-term obsolescence management.
Supply support for SS9012GTA-ON 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 discrete solutions for automotive, industrial, and consumer markets.
SS9012GTA-ON belongs to ON Semiconductor's legacy general-purpose bipolar transistor product line, originally developed by Fairchild for cost-optimized, through-hole audio and switching applications in portable electronics.
FAQ
What is the pin configuration of SS9012GTA-ON?
The SS9012GTA-ON uses a standard TO-92 package with Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector, viewed with flat side facing and leads pointing downward. This configuration is consistent across all SS9012 variants and aligns with JEDEC TO-92 mechanical specifications.
Does SS9012GTA-ON have a guaranteed hFE range?
Yes - SS9012GTA-ON is classified as Class G, with hFE ranging from 112 to 166 at VCE = −1 V and IC = −50 mA, and 40–90 at VCE = −1 V and IC = −500 mA. These values are tested and binned per datasheet Rev. A4, November 2002.
Can SS9012GTA-ON be used as a direct replacement for SS9012?
Yes - SS9012GTA-ON is the ON Semiconductor branded, fully compatible successor to the original Fairchild SS9012. Electrical specifications, TO-92 package dimensions, pinout, and thermal ratings are identical; no PCB or schematic changes are required.
What is the maximum power dissipation of SS9012GTA-ON?
The SS9012GTA-ON has a maximum collector power dissipation (PC) of 625 mW at TA = 25°C. Derating is required above 25°C at 5 mW/°C, reaching zero dissipation at 150°C junction temperature - consistent with its TO-92 thermal resistance profile.
Is SS9012GTA-ON RoHS compliant?
Yes - SS9012GTA-ON is manufactured and shipped as RoHS-compliant per ON Semiconductor's current product compliance documentation, with lead-free finish and halogen-free molding compound meeting EU Directive 2011/65/EU requirements.
SS9012GTA-ON Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Bulk
- Product Status:
- Active
- 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-ON FAQ
1.How can I place an order for SS9012GTA-ON through Aetrix?
Please submit a Request for Quotation (RFQ) for SS9012GTA-ON 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-ON reliable?
The price and inventory of SS9012GTA-ON are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS9012GTA-ON is usually 5 days.
3.What payment methods are accepted for SS9012GTA-ON?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS9012GTA-ON transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS9012GTA-ON?
SS9012GTA-ON orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS9012GTA-ON 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-ON?
For technical support, including SS9012GTA-ON datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS9012GTA-ON requirements.
6.How does Aetrix verify that SS9012GTA-ON is sourced from the original manufacturer or authorized distributors?
All SS9012GTA-ON 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-ON meets industry standards.
7.What is the process for return or replacement of SS9012GTA-ON?
All SS9012GTA-ON units undergo pre-shipment inspection (PSI). If there is an issue with SS9012GTA-ON, 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-ON part is unused and in its original packaging.
Return procedure for SS9012GTA-ON:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SS9012GTA-ON Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
