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

Nexperia USA Inc. PMBTA56-QR

Name: PMBTA56-QR
Brand: Nexperia USA Inc.
SKU: PMBTA56-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PMBTA56-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: PMBTA56-QR.pdf

Description:: TRANS PNP 80V 0.5A TO-236AB

Quantity:: RFQ Add To RFQ list

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Inventory:3,040

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Product details

Overview

PMBTA56-QR from Nexperia is a PNP general-purpose bipolar junction transistor in SOT23 package, rated for −80 V V_CEO, −500 mA I_C, and DC current gain (h_FE) ≥100 at −10 mA collector current; qualified to AEC-Q101 for automotive-grade reliability and used in telephony switching and professional communication equipment.

For engineers reviewing the PMBTA56-QR datasheet, PMBTA56-QR pinout, PMBTA56-QR application, or PMBTA56-QR equivalent, this page delivers verified electrical ratings, thermal limits, automotive qualification status, SOT23 terminal mapping, and direct alternatives with documented parameter divergence.

Technical Context

This discrete PNP transistor operates in linear amplification and saturated switching modes, with guaranteed V_CE(sat) ≤ −0.25 V at I_C = −100 mA and I_B = −10 mA, and V_BE ≤ −1.2 V under same conditions. Its f_T of 50 MHz supports medium-frequency signal handling up to 100 MHz test frequency.

Thermal resistance R_th(j-a) is 500 K/W on standard FR4 PCB, and absolute maximum junction temperature is 150 °C. It sustains −80 V collector-base and collector-emitter breakdown voltages, with emitter-base breakdown limited to −5 V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−80 V - Maximum safe collector-emitter voltage with base open; defines high-side switch headroom in 24 V automotive systems.
I_C	−500 mA - Continuous collector current rating; supports relay drivers and LED array switches without forced cooling.
h_FE	≥100 at V_CE = −1 V, I_C = −10 mA - Ensures stable biasing in amplifier stages with predictable gain across production lots.
V_CE(sat)	≤ −0.25 V at I_C = −100 mA, I_B = −10 mA - Minimizes conduction loss in low-voltage switching applications like sensor interface logic.
f_T	50 MHz - Enables use in audio preamplifier stages and digital signal conditioning up to 10 MHz fundamental frequencies.
R_th(j-a)	500 K/W - Requires minimal PCB copper area for thermal management in space-constrained SMT layouts.

Pinout & Package

SOT23 plastic surface-mounted package (3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1 mm body); JEDEC TO-236AB compliant; designed for reflow and wave soldering per IPC-7095 guidelines.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control input node; requires current-limited drive to ensure saturation or linear operation per h_FE and V_BE specs.
2	Emitter (E)	Common reference terminal for PNP topology; connects to higher potential rail in high-side switch configurations.
3	Collector (C)	Output current path; sinks load current when base is driven low relative to emitter; polarity-sensitive for correct biasing.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive underhood and infotainment modules requiring extended temperature cycling and humidity exposure.
High current capability	Rated −500 mA continuous collector current enables direct driving of small solenoids, buzzers, and optocoupler LEDs.
Low saturation voltage	V_CE(sat) ≤ −0.25 V reduces power dissipation in switching mode, improving efficiency in battery-powered telecom interfaces.
Wide operating temperature	Functional from −65 °C to +150 °C ambient, supporting deployment in industrial gateways and vehicle ECU subsystems.

Applications

Telephony Line Interface

Automotive Door Module

Use Scenario: Signal-level switching and DC bias control in analog telephone line cards for ring detection and off-hook sensing.

IC Role / Device Role / Timing Role: PNP switch controlling current flow through line-side protection circuits and hybrid couplers.

Use Value: −80 V V_CEO withstands telecom line transients; −500 mA I_C handles loop-current monitoring loads reliably.

Use Scenario: Driving window lift motor enable logic and mirror fold/unfold relays in OEM door control units.

IC Role / Device Role / Timing Role: High-side load switch interfacing microcontroller GPIO to 12 V automotive bus.

Use Value: AEC-Q101 qualification ensures long-term reliability; V_CE(sat) ≤ −0.25 V minimizes heat generation in sealed module enclosures.

Professional Audio Mixer

Industrial Sensor Interface

Use Scenario: Gain-setting stage and mute control in analog channel strips for broadcast mixing consoles.

IC Role / Device Role / Timing Role: Linear amplifier and active attenuator in low-noise microphone preamp signal paths.

Use Value: h_FE ≥100 ensures consistent gain stability across temperature; f_T = 50 MHz preserves audio bandwidth fidelity.

Use Scenario: Level-shifting and isolation buffer between 3.3 V microcontrollers and 24 V industrial field sensors.

IC Role / Device Role / Timing Role: Voltage-level translator and current amplifier for analog sensor output conditioning.

Use Value: −5 V V_EBO rating protects against reverse-bias damage during sensor cable fault events.

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
BC807-40	Same SOT23 package; h_FE = 250–630 (min 250), V_CEO = −45 V, I_C = −500 mA	Lower voltage rating limits use in 48 V telecom or 24 V automotive transient environments	Select when higher h_FE is required for low-base-drive designs but system voltage stays ≤45 V.
PMBTA55-Q	NPN complement; identical package, thermal specs, and AEC-Q101 qualification; V_CEO = +80 V, I_C = +500 mA	Requires inverted circuit topology (low-side vs. high-side switching) and different bias network	Choose for NPN-based designs needing matching automotive qualification, footprint, and thermal behavior.

Compared with BC807-40 and PMBTA55-Q, PMBTA56-QR provides superior high-voltage robustness for automotive and telecom applications while maintaining identical SOT23 layout compatibility and AEC-Q101 compliance-making it the preferred choice where −80 V blocking and PNP polarity are mandatory.

Availability

PMBTA56-QR is available at Aetrix Electronics and suitable for telephony line interface, automotive door module, and industrial sensor interface applications requiring stable component supply, automotive-grade qualification, and SOT23 footprint consistency.

Supply support for PMBTA56-QR 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.

The PMBTA56-QR belongs to Nexperia's AEC-Q101-qualified general-purpose transistor family, engineered for robust switching and amplification in harsh-environment automotive and industrial control systems.

FAQ

Is PMBTA56-QR pin-compatible with PMBTA55-Q?

No-PMBTA56-QR is PNP and PMBTA55-Q is NPN, so their pinouts are functionally inverted: base-emitter-collector order remains identical physically (SOT23 Pin 1=B, 2=E, 3=C), but circuit implementation requires opposite biasing and load placement. Direct substitution without schematic revision will cause functional failure.

What is the maximum allowable power dissipation at 85 °C ambient?

At T_amb = 85 °C, derated power dissipation is 150 mW, calculated using P_tot = 250 mW − [(85 − 25) × (250 mW / 500 K/W)] = 250 mW − 30 mW = 220 mW; however, thermal design must account for PCB copper area and airflow-actual usable power is typically capped at 150 mW for safety margin in enclosed modules.

Does PMBTA56-QR support pulse operation beyond its DC current rating?

Yes-peak collector current I_CM is rated at −1 A for single pulses ≤1 ms, enabling short-duration surge handling in relay coil snubbing or ESD clamp circuits; sustained operation above −500 mA requires thermal verification per R_th(j-a) and board layout.

How does the −5 V V_EBO rating impact circuit protection design?

The −5 V emitter-base breakdown voltage mandates strict input clamping: any base-emitter reverse voltage exceeding −5 V risks permanent degradation. Designers must include series base resistors and/or Schottky diodes to limit reverse bias during hot-swap or ESD events in sensor interface applications.

PMBTA56-QR Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

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

Voltage - Collector Emitter Breakdown (Max):: 80 V

Vce Saturation (Max) @ Ib, Ic:: 250mV @ 10mA, 100mA

Current - Collector Cutoff (Max):: 50nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 100mA, 1V

Power - Max:: 250 mW

Frequency - Transition:: 50MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

PMBTA56-QR FAQ

1.How can I place an order for PMBTA56-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for PMBTA56-QR 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 PMBTA56-QR reliable?

The price and inventory of PMBTA56-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PMBTA56-QR is usually 5 days.

3.What payment methods are accepted for PMBTA56-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PMBTA56-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PMBTA56-QR?

PMBTA56-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PMBTA56-QR 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 PMBTA56-QR?

For technical support, including PMBTA56-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PMBTA56-QR requirements.

6.How does Aetrix verify that PMBTA56-QR is sourced from the original manufacturer or authorized distributors?

All PMBTA56-QR 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 PMBTA56-QR meets industry standards.

7.What is the process for return or replacement of PMBTA56-QR?

All PMBTA56-QR units undergo pre-shipment inspection (PSI). If there is an issue with PMBTA56-QR, 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 PMBTA56-QR part is unused and in its original packaging.

Return procedure for PMBTA56-QR:

1.Submit a request within 90 days.

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

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