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

onsemi MPSA92_D75Z

Name: MPSA92_D75Z
Brand: onsemi
SKU: MPSA92_D75Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPSA92_D75Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: MPSA92_D75Z.pdf

Description:: TRANS PNP 300V 0.5A TO-92-3

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Product details

Overview

MPSA92_D75Z from Fairchild Semiconductor is a PNP high-voltage general-purpose amplifier transistor in TO-92 package, rated for 300 V V_CEO, 500 mA I_C, and 625 mW P_D at 25°C. It delivers h_FE ≥ 25 at I_C = 1.0 mA and f_T = 50 MHz, supporting high-voltage switching and linear amplification in industrial power supplies and CRT deflection circuits.

For engineers reviewing the MPSA92_D75Z datasheet, pinout, applications, or equivalent options, this page provides verified package mapping (TO-92, lead configuration P), absolute maximum ratings, thermal derating curves, small-signal gain behavior across temperature, and validated alternatives for high-voltage PNP replacement.

Technical Context

This device operates as a silicon PNP bipolar junction transistor with negative-polarity voltage/current conventions. Its breakdown ratings-V_CEO = 300 V, V_CBO = 300 V, and V_EBO = 5.0 V-are defined at T_A = 25°C with I_C = 1.0 mA and I_E = 100 µA test conditions. Junction temperature range spans −55°C to +150°C.

Small-signal performance includes f_T = 50 MHz at I_C = 10 mA, V_CE = 20 V, and C_cb = 6.0 pF at V_CB = 20 V. Saturation characteristics are specified at I_C = 20 mA / I_B = 2.0 mA, yielding V_CE(sat) ≤ 0.5 V and V_BE(sat) ≤ 0.9 V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	300 V - Maximum collector-emitter voltage before breakdown; enables use in 240 VAC line-referenced circuits and flyback snubbers.
I_C (max)	500 mA - Continuous collector current rating; supports medium-power switching up to ~150 mW output in Class-A amplifiers.
P_D @ 25°C	625 mW - Total device dissipation on FR-4 PCB; requires thermal derating of 5.0 mW/°C above 25°C ambient.
h_FE	25–140 - DC current gain range across I_C = 0.1–100 mA; usable for bias-stable amplifier stages with emitter degeneration.
f_T	50 MHz - Unity-gain bandwidth; sufficient for audio preamplifiers and low-frequency switching control loops.
R_θJA	200 °C/W - Junction-to-ambient thermal resistance on standard FR-4; limits safe continuous power to ~310 mW at 70°C ambient.
C_cb	6.0 pF - Collector-base capacitance at 20 V reverse bias; contributes to Miller effect in high-gain common-emitter configurations.

Pinout & Package

Package: TO-92, straight leads, no lead clip, EOL code D75Z (Order Style P). Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector - flat side facing viewer, first wire off is collector, flat of transistor on top.

Pin/Terminal	Circuit Role	Design Meaning
Emitter (E)	Current sink terminal for PNP operation	Connected to highest potential node in circuit; sets reference for base bias and collector current sourcing.
Base (B)	Control electrode for minority-carrier injection	Receives negative current to turn on; requires series resistor to limit I_B and ensure saturation or linear operation.
Collector (C)	Current source terminal under active/saturation	Drives load toward ground; withstands 300 V reverse bias when off; thermally coupled to case via leadframe.

Key Features

Feature	Design Value
High-voltage capability	300 V V_CEO/V_CBO enables direct interface with mains-derived rails without external voltage clamping.
Wide temperature operation	−55°C to +150°C junction range supports deployment in automotive engine compartments and industrial motor drives.
Low leakage	I_CBO ≤ 0.25 µA at V_CB = 200 V ensures stable bias in high-impedance voltage amplifier stages.
Standardized TO-92 footprint	Compatible with legacy through-hole assembly lines and manual prototyping; pinout matches JEDEC TO-92 outline.
SPICE-model ready	Supplied compact model (Is=218.9f, Bf=99, Vaf=100) supports accurate transient and AC simulation in Cadence/PSPICE.

Applications

Switch-Mode Power Supply (SMPS) Snubber	High-Voltage Linear Amplifier
Use Scenario: Absorbs voltage spikes across MOSFET drains during turn-off in offline flyback converters. IC Role / Device Role / Timing Role: PNP transistor configured as active clamp switch, triggered by RC-delayed gate signal to conduct during voltage overshoot. Use Value: Limits peak drain voltage to <300 V using V_CEO margin, reducing stress on primary-side FET and improving EMI performance.	Use Scenario: Drives cathode-ray tube (CRT) horizontal deflection yoke with fast current slew rates. IC Role / Device Role / Timing Role: Linear output stage operating in Class-A/AB, biased with constant-current source to minimize distortion. Use Value: Delivers 200 mA peak current with V_CE(sat) ≤ 0.5 V, enabling >90% efficiency in magnetic deflection drive.
Industrial Relay Driver	High-Side Load Switch
Use Scenario: Interfaces microcontroller GPIO to 24 VDC industrial relay coils requiring 40 mA hold current. IC Role / Device Role / Timing Role: Saturated PNP switch sinking coil current to ground; base driven via current-limiting resistor from MCU. Use Value: With h_FE ≥ 40 at I_C = 10 mA, ensures reliable saturation using <1 mA base drive, minimizing MCU port loading.	Use Scenario: Controls 120 VAC solenoid valve via opto-isolated gate driver in PLC output module. IC Role / Device Role / Timing Role: High-side switch placed between AC line and load; collector tied to line, emitter feeds load, base driven by isolated level shifter. Use Value: V_CBO = 300 V withstands full AC peak (170 V), while R_θJA = 200 °C/W allows 300 mW dissipation at 70°C ambient.

Switch-Mode Power Supply (SMPS) Snubber

High-Voltage Linear Amplifier

Use Scenario: Absorbs voltage spikes across MOSFET drains during turn-off in offline flyback converters.

IC Role / Device Role / Timing Role: PNP transistor configured as active clamp switch, triggered by RC-delayed gate signal to conduct during voltage overshoot.

Use Value: Limits peak drain voltage to <300 V using V_CEO margin, reducing stress on primary-side FET and improving EMI performance.

Use Scenario: Drives cathode-ray tube (CRT) horizontal deflection yoke with fast current slew rates.

IC Role / Device Role / Timing Role: Linear output stage operating in Class-A/AB, biased with constant-current source to minimize distortion.

Use Value: Delivers 200 mA peak current with V_CE(sat) ≤ 0.5 V, enabling >90% efficiency in magnetic deflection drive.

Industrial Relay Driver

High-Side Load Switch

Use Scenario: Interfaces microcontroller GPIO to 24 VDC industrial relay coils requiring 40 mA hold current.

IC Role / Device Role / Timing Role: Saturated PNP switch sinking coil current to ground; base driven via current-limiting resistor from MCU.

Use Value: With h_FE ≥ 40 at I_C = 10 mA, ensures reliable saturation using <1 mA base drive, minimizing MCU port loading.

Use Scenario: Controls 120 VAC solenoid valve via opto-isolated gate driver in PLC output module.

IC Role / Device Role / Timing Role: High-side switch placed between AC line and load; collector tied to line, emitter feeds load, base driven by isolated level shifter.

Use Value: V_CBO = 300 V withstands full AC peak (170 V), while R_θJA = 200 °C/W allows 300 mW dissipation at 70°C ambient.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-voltage amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBTA92	SOT-23 package (350 mW P_D, R_θJA = 357 °C/W); same electrical specs but lower power handling and surface-mount only.	Preferred for space-constrained PCBs where thermal management permits lower dissipation; unsuitable for TO-92 socket replacement.	Select MMBTA92 only when board area is critical and average power remains below 150 mW.
PZTA92	SOT-223 package (1000 mW P_D, R_θJA = 125 °C/W); identical V_CEO/I_C/h_FE but higher thermal capacity and surface-mount footprint.	Used in thermally demanding industrial controls where sustained 500 mA operation requires enhanced heatsinking.	Choose PZTA92 when continuous power exceeds 400 mW or ambient exceeds 60°C.

Compared with MPSA92_D75Z, MMBTA92 trades package compatibility and power for miniaturization, while PZTA92 retains voltage/current capability but shifts to surface-mount with superior thermal performance-neither is pin-compatible, and all three require layout adaptation.

Availability

MPSA92_D75Z is available at Aetrix Electronics and suitable for industrial power supplies, CRT display systems, and PLC output modules requiring stable component supply with long-term manufacturability and traceable sourcing.

Supply support for MPSA92_D75Z 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 designer and manufacturer of analog and discrete semiconductors, acquired by ON Semiconductor in 2016; its legacy products remain widely deployed in industrial and consumer systems.

The MPSA92_D75Z belongs to Fairchild's general-purpose bipolar transistor family optimized for high-voltage linear amplification and switching in cost-sensitive through-hole applications.

FAQ

What is the pin configuration for MPSA92_D75Z in TO-92 package?

The MPSA92_D75Z uses TO-92 package with Order Style P (EOL code D75Z): flat side facing viewer, collector is first wire off, flat on top. Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector. This matches JEDEC TO-92 standard orientation and differs from Style M (D74Z), where emitter is first wire off.

Does MPSA92_D75Z support operation at elevated ambient temperatures?

Yes, MPSA92_D75Z is rated for junction temperature from −55°C to +150°C. At 70°C ambient, derated power is 625 mW − (5.0 mW/°C × 45°C) = 400 mW. Thermal design must account for R_θJA = 200 °C/W on standard FR-4 to avoid exceeding T_J(max).

How does the h_FE of MPSA92_D75Z vary with collector current?

MPSA92_D75Z exhibits h_FE = 25 at I_C = 1.0 mA, peaks near 140 at I_C ≈ 10 mA, then declines to ~40 at I_C = 30 mA (V_CE = 10 V, T_A = 25°C). This nonlinearity requires emitter degeneration resistors in precision amplifier designs using MPSA92_D75Z.

Can MPSA92_D75Z replace MPSA42 in high-voltage applications?

No-MPSA42 is an NPN transistor (V_CEO = 300 V, I_C = 500 mA), while MPSA92_D75Z is PNP. They are complementary but not interchangeable without circuit topology changes. Swapping requires reversing bias networks and load connections to maintain correct polarity operation.

What is the typical collector-base capacitance of MPSA92_D75Z?

The typical collector-base capacitance (C_cb) of MPSA92_D75Z is 6.0 pF measured at V_CB = 20 V, I_E = 0, and f = 1.0 MHz. This value increases at lower reverse bias and impacts high-frequency gain roll-off and stability in tuned amplifier stages using MPSA92_D75Z.

MPSA92_D75Z Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Transistor Type:: PNP

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

Voltage - Collector Emitter Breakdown (Max):: 300 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 2mA, 20mA

Current - Collector Cutoff (Max):: 250nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 25 @ 30mA, 10V

Power - Max:: 625 mW

Frequency - Transition:: 50MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

MPSA92_D75Z FAQ

1.How can I place an order for MPSA92_D75Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPSA92_D75Z 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 MPSA92_D75Z reliable?

The price and inventory of MPSA92_D75Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPSA92_D75Z is usually 5 days.

3.What payment methods are accepted for MPSA92_D75Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPSA92_D75Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPSA92_D75Z?

MPSA92_D75Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPSA92_D75Z 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 MPSA92_D75Z?

For technical support, including MPSA92_D75Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPSA92_D75Z requirements.

6.How does Aetrix verify that MPSA92_D75Z is sourced from the original manufacturer or authorized distributors?

All MPSA92_D75Z 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 MPSA92_D75Z meets industry standards.

7.What is the process for return or replacement of MPSA92_D75Z?

All MPSA92_D75Z units undergo pre-shipment inspection (PSI). If there is an issue with MPSA92_D75Z, 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 MPSA92_D75Z part is unused and in its original packaging.

Return procedure for MPSA92_D75Z:

1.Submit a request within 90 days.

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

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