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

onsemi MPSL51_D27Z

Name: MPSL51_D27Z
Brand: onsemi
SKU: MPSL51_D27Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPSL51_D27Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: MPSL51_D27Z.pdf

Description:: TRANS PNP 100V 0.2A TO-92-3

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Product details

Overview

MPSL51_D27Z from Fairchild Semiconductor is a PNP general-purpose bipolar junction transistor designed for high-voltage amplification and switching applications, with V_CEO = 100 V, I_C = 200 mA, and h_FE = 40–250 at 50 mA. It operates across –55°C to +150°C and is commonly used in relay drivers, voltage-level translators, and discrete logic interface circuits.

For engineers reviewing the MPSL51_D27Z datasheet, pinout, applications, or equivalent options, key selection criteria include its TO-92 package configuration, emitter-first tape-and-reel orientation (Style E), verified V_CE(sat) ≤ 0.3 V at 50 mA, and compatibility with legacy 2N5401-based designs requiring PNP high-voltage gain.

Technical Context

The MPSL51_D27Z implements a silicon planar PNP BJT structure optimized for stable DC current gain and low saturation voltage under moderate load conditions. Its Process 74 fabrication ensures consistent breakdown characteristics (V_(BR)CEO = 100 V min) and thermal robustness up to 150°C junction temperature.

It delivers small-signal performance with f_T = 60 MHz and h_fe = 20 at 1 mA/10 V, supporting audio preamplifier and pulse-switching roles where bandwidth and gain linearity are critical within its rated voltage and current envelope.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - Supports operation in 48 V and 72 V industrial control rails without breakdown.
I_C (max)	200 mA - Enables direct drive of small relays, LEDs, or logic-level loads without external buffering.
h_FE	40–250 - Provides design margin for bias stability across production lots and temperature extremes.
V_CE(sat)	0.3 V @ 50 mA - Minimizes conduction loss and self-heating in saturated switch mode.
f_T	60 MHz - Sufficient for audio-frequency amplification and fast digital signal inversion up to ~10 MHz.
P_D	625 mW @ 25°C - Allows continuous operation at full current with adequate heatsinking or board copper area.

Pinout & Package

Package: TO-92, straight lead, no lead clip, epoxy molded case. Pin orientation follows Style E tape-and-reel configuration: emitter is first wire off, flat side down, adhesive tape on top side.

Pin/Terminal	Circuit Role	Design Meaning
Emitter (E)	Current sink terminal	Connected to higher-potential rail in common-emitter switches; sets reference for base bias network.
Base (B)	Control input	Receives current-limited drive to enable saturation; requires series resistor for safe TTL/CMOS interfacing.
Collector (C)	Output current source	Drives load to ground in high-side switch configurations; must be isolated from >100 V transients.

Key Features

Feature	Design Value
High V_CEO rating	100 V enables use in 48 V telecom power supplies and industrial PLC I/O modules without derating.
Low V_CE(sat)	0.3 V max at 50 mA reduces power dissipation by >40% versus older PNP devices like 2N4403.
Wide h_FE range	40–250 supports both precision biasing (high-h_FE) and robust switching (low-h_FE) variants in same BOM.
TO-92 tape-and-reel (D27Z)	Style E orientation ensures automated placement compatibility with standard pick-and-place feeders.

Applications

Relay Driver Circuit	Level-Shifting Interface
Use Scenario: Driving 12 V/24 V electromagnetic relays in programmable logic controllers. IC Role / Device Role / Timing Role: PNP switch controlling relay coil current path to ground. Use Value: V_CEO = 100 V withstands inductive kickback; V_CE(sat) ≤ 0.3 V limits coil heating during sustained activation.	Use Scenario: Translating 3.3 V microcontroller outputs to 5 V/12 V logic domains. IC Role / Device Role / Timing Role: Inverting level shifter with open-collector output stage. Use Value: h_FE ≥ 40 ensures reliable turn-on with µC GPIO sourcing ≤ 5 mA; f_T = 60 MHz supports <100 ns edge rates.
Discrete Logic Inverter	Linear Audio Preamp Stage
Use Scenario: Building non-inverting buffer stages using emitter-follower topology in analog sensor signal chains. IC Role / Device Role / Timing Role: Voltage follower providing low-output-impedance drive to ADC inputs. Use Value: R_θJA = 200 °C/W allows stable operation at 100 mW dissipation with minimal PCB copper; TJ range –55°C to +150°C supports outdoor deployment.	Use Scenario: Low-noise preamplification of microphone or piezo sensor signals in battery-powered instrumentation. IC Role / Device Role / Timing Role: Common-emitter amplifier biased at 1 mA for optimal h_fe and noise figure. Use Value: Cob = 8.0 pF minimizes Miller effect distortion; f_T = 60 MHz preserves audio band fidelity up to 20 kHz with margin.

Relay Driver Circuit

Level-Shifting Interface

Use Scenario: Driving 12 V/24 V electromagnetic relays in programmable logic controllers.

IC Role / Device Role / Timing Role: PNP switch controlling relay coil current path to ground.

Use Value: V_CEO = 100 V withstands inductive kickback; V_CE(sat) ≤ 0.3 V limits coil heating during sustained activation.

Use Scenario: Translating 3.3 V microcontroller outputs to 5 V/12 V logic domains.

IC Role / Device Role / Timing Role: Inverting level shifter with open-collector output stage.

Use Value: h_FE ≥ 40 ensures reliable turn-on with µC GPIO sourcing ≤ 5 mA; f_T = 60 MHz supports <100 ns edge rates.

Discrete Logic Inverter

Linear Audio Preamp Stage

Use Scenario: Building non-inverting buffer stages using emitter-follower topology in analog sensor signal chains.

IC Role / Device Role / Timing Role: Voltage follower providing low-output-impedance drive to ADC inputs.

Use Value: R_θJA = 200 °C/W allows stable operation at 100 mW dissipation with minimal PCB copper; TJ range –55°C to +150°C supports outdoor deployment.

Use Scenario: Low-noise preamplification of microphone or piezo sensor signals in battery-powered instrumentation.

IC Role / Device Role / Timing Role: Common-emitter amplifier biased at 1 mA for optimal h_fe and noise figure.

Use Value: Cob = 8.0 pF minimizes Miller effect distortion; f_T = 60 MHz preserves audio band fidelity up to 20 kHz with margin.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP general-purpose amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
2N5401	Identical V_CEO, V_CBO, and h_FE specs; same TO-92 package but different tape orientation (D26Z vs D27Z).	Same relay driver and level-shifting use cases; requires revalidation of feeder setup due to emitter-first vs collector-first tape order.	Select 2N5401 only when existing SMT line is calibrated for Style A (D26Z) reels.
MPSA92	Higher V_CEO = 300 V; lower h_FE = 25–100; same TO-92 footprint and pinout.	Better suited for flyback snubber circuits and HV gate driving where breakdown margin outweighs gain consistency.	Choose MPSA92 when operating above 120 V transient conditions; avoid if precise DC gain matching is required.

Compared with 2N5401 and MPSA92, the MPSL51_D27Z offers tighter h_FE distribution and optimized tape orientation for high-throughput placement, making it preferable for cost-sensitive industrial controls where 100 V rating suffices and feeder changeover must be minimized.

Availability

MPSL51_D27Z is available at Aetrix Electronics and suitable for relay driver circuits, level-shifting interfaces, discrete logic inverters, linear audio preamp stages, and industrial I/O modules requiring stable component supply and long-term obsolescence management.

Supply support for MPSL51_D27Z 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 manufacturer specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.

The MPSL51_D27Z belongs to Fairchild's legacy PNP general-purpose transistor product line, engineered for reliability in industrial control, power supply, and interface applications where high-voltage tolerance and predictable gain are essential.

FAQ

What is the pin configuration of the MPSL51_D27Z in its TO-92 package?

The MPSL51_D27Z uses a standard TO-92 package with emitter-base-collector (E-B-C) pinout when viewed with the flat side facing forward and leads pointing downward. This matches JEDEC TO-92 outline and is confirmed by Fairchild's packaging documentation for Style E (D27Z) tape-and-reel orientation, where the emitter is the first lead encountered during automated placement.

Does the MPSL51_D27Z meet RoHS requirements?

The MPSL51_D27Z was manufactured prior to RoHS enforcement deadlines and is not RoHS-compliant. It contains lead in solder and die attach materials. For new designs requiring RoHS compliance, consider ON Semiconductor's NSS60201LT1G or MMBT5401LT1G as drop-in replacements with identical electrical specs and lead-free construction.

What is the maximum power dissipation of the MPSL51_D27Z at 70°C ambient?

At 70°C ambient, the MPSL51_D27Z has a derated power dissipation of 425 mW, calculated using its 5.0 mW/°C derating factor from the 625 mW rating at 25°C. This assumes still-air conditions and standard PCB mounting; actual thermal performance depends on copper area, airflow, and adjacent heat sources.

Can the MPSL51_D27Z replace the 2N5401 in existing designs?

Yes, the MPSL51_D27Z is electrically interchangeable with the 2N5401 for all DC and small-signal parameters, including V_CEO, h_FE, and V_CE(sat). However, the D27Z tape orientation differs (emitter-first vs collector-first), so placement equipment must be reconfigured to avoid misalignment during assembly.

What is the typical transition frequency (f_T) of the MPSL51_D27Z and how is it measured?

The MPSL51_D27Z has a typical f_T of 60 MHz, measured under conditions of V_CE = 10 V, I_C = 10 mA, and f = 1.0 MHz. This value reflects the frequency at which the small-signal current gain h_fe drops to unity and confirms suitability for audio amplification and fast-switching applications up to ~10 MHz.

MPSL51_D27Z 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):: 200 mA

Voltage - Collector Emitter Breakdown (Max):: 100 V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 5mA, 50mA

Current - Collector Cutoff (Max):: 1µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 40 @ 50mA, 5V

Power - Max:: 625 mW

Frequency - Transition:: 60MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

MPSL51_D27Z FAQ

1.How can I place an order for MPSL51_D27Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPSL51_D27Z 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 MPSL51_D27Z reliable?

The price and inventory of MPSL51_D27Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPSL51_D27Z is usually 5 days.

3.What payment methods are accepted for MPSL51_D27Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPSL51_D27Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPSL51_D27Z?

MPSL51_D27Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPSL51_D27Z 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 MPSL51_D27Z?

For technical support, including MPSL51_D27Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPSL51_D27Z requirements.

6.How does Aetrix verify that MPSL51_D27Z is sourced from the original manufacturer or authorized distributors?

All MPSL51_D27Z 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 MPSL51_D27Z meets industry standards.

7.What is the process for return or replacement of MPSL51_D27Z?

All MPSL51_D27Z units undergo pre-shipment inspection (PSI). If there is an issue with MPSL51_D27Z, 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 MPSL51_D27Z part is unused and in its original packaging.

Return procedure for MPSL51_D27Z:

1.Submit a request within 90 days.

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

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