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

onsemi 50A02SP-AC

Name: 50A02SP-AC
Brand: onsemi
SKU: 50A02SP-AC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 50A02SP-AC

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: -

Datasheet:: 50A02SP-AC.pdf

Description:: PNP SILICON TRANSISTOR

Quantity:: RFQ Add To RFQ list

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Product details

Overview

50A02SP-AC from SANYO is a PNP epitaxial planar silicon transistor designed for low-frequency amplification and high-speed switching, with V_CEO = −50 V, I_C = −500 mA, P_C = 400 mW, and f_T = 690 MHz - used in small motor drive and audio muting circuits.

For engineers reviewing the 50A02SP-AC datasheet, pinout, applications, or equivalent options, key selection criteria include saturation voltage (V_CE(sat) = −60 to −120 mV at I_C = −100 mA), DC current gain (h_FE = 200–500), switching speed (t_on = 30 ns), and TO-92-compatible package footprint.

Technical Context

This PNP bipolar junction transistor operates with reverse-polarity biasing: emitter positive relative to collector/base. Its high f_T (690 MHz) and low V_CE(sat) support fast switching in pulse-driven loads, while h_FE stability across −25°C to +75°C enables reliable gain control in analog amplifier stages.

Designed for discrete implementation without integrated bias networks, it requires external base current limiting and exhibits Cob = 3.8 pF at V_CB = −10 V, supporting stable operation up to low-VHF frequencies without parasitic resonance in properly decoupled layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50 V: Maximum reverse voltage between collector and emitter before breakdown; defines safe operating range in negative-rail switching applications.
I_C	−500 mA continuous: Sustained collector current capability; supports driving small DC motors or relay coils directly.
V_CE(sat)	−60 to −120 mV at I_C = −100 mA, I_B = −10 mA: Low conduction loss enables efficient switching with minimal heat generation.
f_T	690 MHz: Unity-gain frequency confirming usable bandwidth for RF-coupled preamplifiers or fast digital signal routing.
h_FE	200–500 at V_CE = −2 V, I_C = −10 mA: Predictable current amplification for linear gain stages or emitter-follower buffers.
C_ob	3.8 pF at V_CB = −10 V, f = 1 MHz: Low output capacitance minimizes Miller effect in high-gain common-emitter configurations.
t_on/t_f	30 ns / 30 ns: Fast turn-on and fall times enable clean square-wave switching at ≥10 MHz repetition rates.

Pinout & Package

50A02SP-AC is housed in a TO-92 plastic package (SANYO SPA outline), with lead spacing matching JEDEC TO-92 standard. Dimensions: 4.0 × 3.0 × 3.8 mm (L×W×H), 0.7 mm lead diameter, 2.2 mm lead length.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source terminal for PNP device	Connected to most positive rail in switching mode; sets reference for base drive polarity and current direction.
2 (Collector)	Current sink terminal	Typically tied to load and negative supply; voltage swing here determines output logic level or analog swing range.
3 (Base)	Control input for minority-carrier injection	Requires negative-going drive relative to emitter; base resistor sizing must ensure I_B ≥ I_C/h_FE(min) for full saturation.

Key Features

Feature	Design Value
Low V_CE(sat)	−60 mV typical at I_C = −100 mA ensures <12 mW conduction loss, reducing thermal stress in compact PCB layouts.
High f_T	690 MHz enables use in IF amplifiers or broadband sensor signal conditioning without added compensation.
Wide h_FE range	200–500 supports consistent biasing across production lots without individual trimming in fixed-gain stages.
Fast switching	30 ns t_on/t_f allows clean edge transitions in PWM motor control at 10–20 kHz carrier frequencies.

Applications

Audio Muting Circuit	Small DC Motor Driver
Use Scenario: Silent power-up/power-down of audio amplifiers by shorting input signal path during transition. IC Role / Device Role / Timing Role: PNP switch controlling ground return of op-amp input stage; activated by microcontroller GPIO. Use Value: V_CE(sat) ≤ −120 mV ensures <0.5 mV residual offset during mute, preserving signal integrity.	Use Scenario: Bidirectional control of 3–6 V brushed DC motors in portable instruments or actuators. IC Role / Device Role / Timing Role: High-side PNP switch enabling current sourcing to motor terminals; driven by complementary logic. Use Value: I_C = −500 mA and t_on/t_f = 30 ns support 20 kHz PWM without shoot-through or thermal derating.
Low-Frequency Amplifier	Signal-Level Translation
Use Scenario: Pre-amplification of sensor outputs (e.g., thermistor bridges, photodiode transimpedance feedback). IC Role / Device Role / Timing Role: Common-emitter gain stage with emitter degeneration; biased via resistive divider from negative rail. Use Value: h_FE ≥ 200 ensures stable 20–50× voltage gain across temperature without active bias compensation.	Use Scenario: Level-shifting TTL/CMOS logic signals from +5 V domain to −5 V or −12 V interface rails. IC Role / Device Role / Timing Role: Inverting translator with pull-up to negative supply; base driven by positive logic. Use Value: f_T = 690 MHz and t_f = 30 ns maintain sub-50 ns propagation delay for timing-critical control lines.

Audio Muting Circuit

Small DC Motor Driver

Use Scenario: Silent power-up/power-down of audio amplifiers by shorting input signal path during transition.

IC Role / Device Role / Timing Role: PNP switch controlling ground return of op-amp input stage; activated by microcontroller GPIO.

Use Value: V_CE(sat) ≤ −120 mV ensures <0.5 mV residual offset during mute, preserving signal integrity.

Use Scenario: Bidirectional control of 3–6 V brushed DC motors in portable instruments or actuators.

IC Role / Device Role / Timing Role: High-side PNP switch enabling current sourcing to motor terminals; driven by complementary logic.

Use Value: I_C = −500 mA and t_on/t_f = 30 ns support 20 kHz PWM without shoot-through or thermal derating.

Low-Frequency Amplifier

Signal-Level Translation

Use Scenario: Pre-amplification of sensor outputs (e.g., thermistor bridges, photodiode transimpedance feedback).

IC Role / Device Role / Timing Role: Common-emitter gain stage with emitter degeneration; biased via resistive divider from negative rail.

Use Value: h_FE ≥ 200 ensures stable 20–50× voltage gain across temperature without active bias compensation.

Use Scenario: Level-shifting TTL/CMOS logic signals from +5 V domain to −5 V or −12 V interface rails.

IC Role / Device Role / Timing Role: Inverting translator with pull-up to negative supply; base driven by positive logic.

Use Value: f_T = 690 MHz and t_f = 30 ns maintain sub-50 ns propagation delay for timing-critical control lines.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP switching and amplification applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT5401	V_CEO = −160 V, I_C = −600 mA, f_T = 100 MHz - higher voltage rating but lower bandwidth.	Better suited for high-voltage off-state isolation; less optimal for >1 MHz signal paths.	Select when V_CEO margin >100 V is required and bandwidth <100 MHz suffices.
PN2907A	V_CEO = −60 V, I_C = −600 mA, h_FE = 100–300 - wider V_CEO, lower gain consistency.	Preferred for general-purpose replacement where gain tolerance >200 is acceptable.	Choose for cost-sensitive industrial controls where moderate h_FE variation is tolerable.

Compared with MMBT5401 and PN2907A, the 50A02SP-AC delivers superior high-frequency response (690 MHz vs. ≤100 MHz) and tighter h_FE spread (200–500), making it optimal for precision low-noise amplification and fast-switching motor control where gain stability and bandwidth are critical.

Availability

50A02SP-AC is available at Aetrix Electronics and suitable for audio muting circuits, small DC motor drivers, low-frequency amplifiers, and logic-level translation requiring stable component supply and long-term obsolescence management.

Supply support for 50A02SP-AC 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

SANYO Electric Co., Ltd. was a Japanese semiconductor manufacturer specializing in analog and discrete devices, later integrated into ON Semiconductor in 2011.

The 50A02SP-AC belongs to SANYO's general-purpose PNP transistor product line, engineered for cost-effective, high-reliability discrete signal switching and amplification in consumer and industrial electronics.

FAQ

What is the maximum continuous collector current for the 50A02SP-AC?

The 50A02SP-AC supports a maximum continuous collector current (I_C) of −500 mA at T_a = 25°C. Derating applies above 25°C per the PC–Ta curve: at 75°C ambient, usable I_C drops to approximately −350 mA to maintain P_C ≤ 400 mW. This rating ensures robust operation in motor drive and amplifier roles without forced cooling.

Does the 50A02SP-AC have a documented pinout compatible with standard TO-92 footprints?

Yes, the 50A02SP-AC uses the standard TO-92 package (SANYO SPA outline) with pin 1 = Emitter, pin 2 = Collector, pin 3 = Base - matching JEDEC TO-92 mechanical dimensions and land pattern. The 50A02SP-AC can be mounted using industry-standard TO-92 reflow or hand-solder profiles without adapter boards.

What is the typical collector-to-emitter saturation voltage of the 50A02SP-AC under switching conditions?

The 50A02SP-AC exhibits a typical V_CE(sat) of −60 mV at I_C = −100 mA and I_B = −10 mA. At minimum specified I_B, V_CE(sat) remains ≤ −120 mV, ensuring low conduction loss. This performance makes the 50A02SP-AC especially effective in battery-powered muting and PWM motor control where efficiency is critical.

Can the 50A02SP-AC be used in linear amplifier configurations?

Yes, the 50A02SP-AC is characterized for linear operation with h_FE = 200–500 at V_CE = −2 V and I_C = −10 mA, and maintains stable gain across −25°C to +75°C. Its f_T of 690 MHz supports low-distortion amplification up to several hundred kHz, making the 50A02SP-AC suitable for sensor preamps and audio signal conditioning stages.

Is the 50A02SP-AC RoHS-compliant and halogen-free?

The original 50A02SP-AC datasheet (2003) predates RoHS enforcement and does not specify compliance. As a legacy SANYO part now manufactured under ON Semiconductor's extended portfolio, RoHS status depends on the specific date code and manufacturing lot. For new designs, confirm compliance via ON Semiconductor's official product change notices or contact Aetrix Electronics for certified material declarations.

50A02SP-AC Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Transistor Type:: -

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

Voltage - Collector Emitter Breakdown (Max):: -

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: -

Power - Max:: -

Frequency - Transition:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

50A02SP-AC FAQ

1.How can I place an order for 50A02SP-AC through Aetrix?

Please submit a Request for Quotation (RFQ) for 50A02SP-AC 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 50A02SP-AC reliable?

The price and inventory of 50A02SP-AC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 50A02SP-AC is usually 5 days.

3.What payment methods are accepted for 50A02SP-AC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 50A02SP-AC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 50A02SP-AC?

50A02SP-AC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 50A02SP-AC 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 50A02SP-AC?

For technical support, including 50A02SP-AC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 50A02SP-AC requirements.

6.How does Aetrix verify that 50A02SP-AC is sourced from the original manufacturer or authorized distributors?

All 50A02SP-AC 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 50A02SP-AC meets industry standards.

7.What is the process for return or replacement of 50A02SP-AC?

All 50A02SP-AC units undergo pre-shipment inspection (PSI). If there is an issue with 50A02SP-AC, 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 50A02SP-AC part is unused and in its original packaging.

Return procedure for 50A02SP-AC:

1.Submit a request within 90 days.

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

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