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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single, Pre-Biased Bipolar Transistors

Nexperia USA Inc. PDTA124EM,315

Name: PDTA124EM,315
Brand: Nexperia USA Inc.
SKU: PDTA124EM,315
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PDTA124EM,315

Manufacturer:: Nexperia USA Inc.

Category:: Single, Pre-Biased Bipolar Transistors

Package:: SC-101, SOT-883

Datasheet:: PDTA124EM,315.pdf

Description:: TRANS PREBIAS PNP 50V SOT883

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Inventory:9,880

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Product details

Overview

PDTA124EM,315 from Nexperia is a PNP resistor-equipped transistor (RET) in a leadless ultra-small SOT883 (SC-101) package, designed for digital switching applications with built-in bias resistors R1 = 22 kΩ and R2 = 22 kΩ, −100 mA output current capability, −50 V collector-emitter voltage rating, and AEC-Q101 qualification for automotive use.

For engineers reviewing the PDTA124EM,315 datasheet, PDTA124EM,315 pinout, PDTA124EM,315 application, or PDTA124EM,315 equivalent, key selection factors include its integrated base resistors enabling single-pin control, compact 1.0 × 0.6 × 0.5 mm footprint, thermal resistance of 500 K/W, and suitability as a cost-saving replacement for BC857-series transistors in space-constrained digital logic interfaces.

Technical Context

This device integrates a PNP bipolar transistor with two precision on-die bias resistors (R1 = 22 kΩ, R2 = 22 kΩ) to form a single-input, ground-referenced switch. Its R2/R1 ratio of 1.0 ensures predictable saturation behavior under standard logic drive conditions.

It operates with an off-state input voltage VI(off) of −1.1 V (typ), on-state input voltage VI(on) of −1.7 V (typ), and delivers VCE(sat) ≤ −150 mV at IC = −10 mA/IB = −0.5 mA - enabling reliable low-voltage logic-level interfacing without external bias components.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50 V - Maximum safe collector-emitter voltage before breakdown; supports robust operation in 24 V automotive supply rails.
I_O	−100 mA - Continuous output current capacity; sufficient for driving LED indicators, small relays, or logic inputs.
R1	22 kΩ ±30% - Integrated base input resistor; eliminates need for external pull-up/pull-down, reducing BOM count and PCB area.
R2/R1	1.0 ±20% - Matched internal feedback resistor ratio; ensures stable turn-on/turn-off thresholds across temperature and process variation.
P_tot	250 mW - Total power dissipation at T_amb = 25 °C; enables operation up to 150 °C junction temperature in thermally constrained layouts.
V_CE(sat)	≤ −150 mV at I_C = −10 mA - Low saturation voltage minimizes power loss and heat generation during active switching.
h_FE	≥60 at I_C = −5 mA - DC current gain ensures reliable forced β operation with standard logic drive levels.

Pinout & Package

SOT883 (SC-101) is a leadless ultra-small plastic package measuring 1.0 × 0.6 × 0.5 mm with three solder lands on the bottom surface. It requires reflow soldering only and features a thermal resistance of 500 K/W (junction-to-ambient).

Pin/Terminal	Circuit Role	Design Meaning
1	Input (base)	Single logic input node connected internally to R1; accepts standard CMOS/TTL high/low signals directly.
2	GND (emitter)	Emitter tied to system ground; serves as common reference for both input and output paths.
3	Output (collector)	Switched output node; sinks current when active, suitable for low-side load control or logic inversion.

Key Features

Feature	Design Value
Integrated bias network	Eliminates 2 external resistors per switch, reducing component count and placement complexity in dense digital interface designs.
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock - suitable for under-hood and infotainment modules.
Leadless SOT883 package	1.0 × 0.6 mm footprint saves >60% board area vs. SOT23; compatible with automated pick-and-place and reflow processes.
−100 mA output capability	Supports direct drive of moderate-current loads such as status LEDs, optocoupler inputs, or small-signal MOSFET gates without buffering.
VI(on)/VI(off) thresholds	−1.7 V (on) / −1.1 V (off) enables clean switching with 3.3 V or 5 V logic families while rejecting noise below −0.8 V.

Applications

Automotive Body Control Module

Industrial PLC Input Interface

Use Scenario: Level-shifting and isolation of 12 V sensor signals into 3.3 V microcontroller GPIO pins.

IC Role / Device Role: PNP RET configured as active-low level translator with built-in biasing.

Use Value: Eliminates discrete resistor network, reduces layout area by 40%, and maintains AEC-Q101 compliance for under-dash electronics.

Use Scenario: Converting 24 V industrial field signals to 5 V logic-compatible inputs for programmable logic controllers.

IC Role / Device Role: Digital input conditioner providing current-limited, noise-immune signal inversion.

Use Value: Enables direct connection to dry-contact or open-collector sensors without external protection or bias components.

Consumer Appliance Power Sequencing

Medical Diagnostic Equipment Status Indication

Use Scenario: Controlling power-enable lines for auxiliary subsystems (e.g., display backlight, fan controller) in smart home appliances.

IC Role / Device Role: Low-side switch driven by MCU GPIO to sequence 5 V/3.3 V rail activation.

Use Value: Reduces bill-of-materials by replacing BC857 + two resistors; SOT883 footprint fits tight spacing around microcontrollers.

Use Scenario: Driving multi-color status LEDs on handheld diagnostic tools requiring precise current control and low EMI.

IC Role / Device Role: Constant-current sink switch with defined V_CE(sat) for consistent LED brightness.

Use Value: Ensures <150 mV dropout across operating temperature range, minimizing thermal drift in visual indicators.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP resistor-equipped transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PDTC124EM,315	NPN complement with identical SOT883 package, R1/R2 = 22 kΩ, but opposite polarity and +100 mA output.	Requires inverted logic drive and sourcing (not sinking) configuration; unsuitable where ground-referenced load control is mandatory.	Select when circuit topology demands NPN-based low-side switching with same footprint and biasing.
BC857B,215	Discrete PNP transistor without integrated resistors; requires two external bias resistors and occupies larger SOT23 footprint.	Offers higher h_FE (200–450) and lower V_CE(sat) (≤100 mV), but increases component count and layout complexity.	Choose when maximum current gain or minimal saturation voltage is critical and board space allows for discrete bias network.

Compared with PDTC124EM,315, PDTA124EM,315 provides true PNP sinking capability essential for grounded-load configurations; versus BC857B,215, it trades marginal h_FE improvement for significant BOM reduction, smaller size, and simplified layout - making it optimal for high-volume, space-sensitive digital interface designs.

Availability

PDTA124EM,315 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input conditioning, consumer appliance power sequencing, and medical diagnostic equipment status indication requiring stable component supply and long-term lifecycle support.

Supply support for PDTA124EM,315 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 leader in high-performance discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.

The PDTA124EM belongs to Nexperia's resistor-equipped transistor (RET) product line, engineered to replace discrete BJT-resistor combinations in digital switching applications while meeting AEC-Q101 reliability requirements.

FAQ

What is the maximum ambient temperature for continuous operation of PDTA124EM,315?

The device supports continuous operation from −65 °C to +150 °C ambient temperature. At full 250 mW power dissipation, derating begins above 25 °C per the 500 K/W thermal resistance curve - e.g., maximum usable power drops to ~125 mW at 125 °C ambient.

Can PDTA124EM,315 be used with 1.8 V logic inputs?

No - its VI(on) is specified at −1.7 V (typ) and VI(off) at −1.1 V (typ), meaning it requires ≥1.7 V negative swing relative to emitter (ground) for reliable turn-on. With 1.8 V logic, the effective input voltage is only −1.8 V, which falls within the guaranteed on-region but leaves no margin for noise or voltage drop; 3.3 V or 5 V logic is recommended.

Is wave soldering supported for the SOT883 package?

No - the datasheet explicitly states that reflow soldering is the only recommended method for PDTA124EM,315. The SOT883 package lacks leads and relies on solder land geometry optimized for reflow; wave soldering risks insufficient wetting, tombstoning, or thermal damage due to its ultra-small thermal mass and bottom-termination design.

How does the R2/R1 ratio affect switching behavior?

An R2/R1 ratio of 1.0 ensures the internal feedback resistor matches the input resistor, stabilizing the base current and preventing latch-up or erratic switching during transient conditions. This ratio guarantees predictable h_FE-independent saturation and consistent VI(on)/VI(off) thresholds across manufacturing lots and temperature ranges.

PDTA124EM,315 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: SC-101, SOT-883

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP - Pre-Biased

Current - Collector (Ic) (Max):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 50 V

Resistor - Base (R1):: 22 kOhms

Resistor - Emitter Base (R2):: 22 kOhms

DC Current Gain (hFE) (Min) @ Ic, Vce:: 60 @ 5mA, 5V

Vce Saturation (Max) @ Ib, Ic:: 150mV @ 500µA, 10mA

Current - Collector Cutoff (Max):: 1µA

Frequency - Transition:: -

Power - Max:: 250 mW

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-883

PDTA124EM,315 FAQ

1.How can I place an order for PDTA124EM,315 through Aetrix?

Please submit a Request for Quotation (RFQ) for PDTA124EM,315 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 PDTA124EM,315 reliable?

The price and inventory of PDTA124EM,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTA124EM,315 is usually 5 days.

3.What payment methods are accepted for PDTA124EM,315?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTA124EM,315 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PDTA124EM,315?

PDTA124EM,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PDTA124EM,315 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 PDTA124EM,315?

For technical support, including PDTA124EM,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTA124EM,315 requirements.

6.How does Aetrix verify that PDTA124EM,315 is sourced from the original manufacturer or authorized distributors?

All PDTA124EM,315 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 PDTA124EM,315 meets industry standards.

7.What is the process for return or replacement of PDTA124EM,315?

All PDTA124EM,315 units undergo pre-shipment inspection (PSI). If there is an issue with PDTA124EM,315, 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 PDTA124EM,315 part is unused and in its original packaging.

Return procedure for PDTA124EM,315:

1.Submit a request within 90 days.

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

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