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Nexperia USA Inc. PDTA124XT,215
- Part No.:
- PDTA124XT,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTA124XT,215.pdf
- Description:
- TRANS PREBIAS PNP 50V TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:879
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Product details
Overview
PDTA124XT from NXP Semiconductors is a PNP resistor-equipped transistor (RET) in SOT23 (TO-236AB) package, designed for digital switching with integrated bias resistors R1 = 22 kΩ and R2 = 47 kΩ. It delivers −100 mA DC output current, −50 V collector-emitter voltage rating, and operates across −65 °C to +150 °C ambient temperature - used in microcontroller I/O interface circuits for load control.
For engineers reviewing the PDTA124XT datasheet, PDTA124XT pinout, PDTA124XT application, or PDTA124XT equivalent, key selection criteria include built-in resistor ratio (R2/R1 = 2.1 typ), VI(on)/VI(off) thresholds (−1.1 V / −0.8 V), thermal resistance (500 K/W), and compatibility with standard SOT23 PCB footprints and reflow soldering.
Technical Context
This PNP RET integrates two precision bias resistors (R1 = 22 kΩ, R2 = 47 kΩ) to eliminate external base resistors, enabling direct connection to logic-level drivers. Its internal resistor network sets fixed current gain and ensures predictable turn-on/turn-off behavior without external component tuning.
The device operates as a single-stage digital switch with guaranteed saturation at IC = −10 mA / IB = −0.5 mA (VCEsat ≤ −150 mV), supports input voltage ranges from −40 V to +7 V, and maintains stable hFE ≥ 80 at VCE = −5 V and IC = −5 mA - optimized for low-power, high-reliability digital signal routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −50 V: Maximum safe collector-emitter voltage under open-base condition, enabling use in 3.3 V/5 V logic-controlled 24 V load switching. |
| IO (DC) | −100 mA: Continuous output current capability, sufficient for driving LEDs, small relays, or logic inputs without external current limiting. |
| R1 | 22 kΩ (15.4–28.6 kΩ): Input bias resistor value, sets base current for predictable turn-on threshold and reduces BOM count. |
| R2/R1 ratio | 2.1 (1.7–2.6): Fixed feedback-to-input resistor ratio, stabilizes operating point and improves noise immunity in digital interfaces. |
| VCEsat | ≤ −150 mV at IC = −10 mA / IB = −0.5 mA: Low saturation voltage minimizes power loss and heat generation during on-state operation. |
| hFE | ≥ 80 at VCE = −5 V, IC = −5 mA: DC current gain ensures reliable switching margin with standard CMOS/TTL drive levels. |
| VI(on) | −1.1 V (min −2 V): On-state input voltage threshold, compatible with 3.3 V and 5 V logic families for robust activation. |
| VI(off) | −0.8 V (max −0.5 V): Off-state input voltage limit, provides clear cutoff margin against noise-induced false triggering. |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package with 3 leads, 1.9 mm × 1.1 mm × 1.0 mm body dimensions, standard footprint for automated assembly and reflow soldering.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | input (base) | Connected internally to R1 and R2 network; accepts logic-level control signal directly without external pull-up/down. |
| 2 | GND (emitter) | Emitter tied to system ground reference; serves as common return path for load current and bias network. |
| 3 | output (collector) | Switched high-side output node; sinks current from load connected between supply rail and this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in bias resistors | Eliminates need for two external resistors, reducing PCB area by ~1.5 mm² and eliminating placement errors in high-volume assembly. |
| 100 mA output current | Supports direct drive of medium-current loads (e.g., LED strings, small solenoids) without external amplification stages. |
| −50 V VCEO rating | Enables safe operation in industrial 24 V systems with transient suppression margins, avoiding overvoltage failure in relay coil snubbing. |
| Low VI(on)/VI(off) spread | Narrow −0.5 V to −1.1 V transition window ensures clean digital switching with minimal hysteresis in noisy environments. |
| Reflow-compatible SOT23 | Validated for standard lead-free reflow profiles per J-STD-020, supporting high-yield manufacturing without special process adjustments. |
Applications
| Microcontroller I/O Interface | LED Driver Circuit |
|---|---|
Use Scenario: Driving discrete LEDs from 3.3 V GPIO pins with current limiting handled internally. IC Role / Device Role / Timing Role: PNP switch sinking LED current from VCC through anode to collector, emitter grounded. Use Value: Eliminates need for external base resistor and current-limiting resistor, reducing component count by two per channel. |
Use Scenario: Controlling multi-segment LED displays in consumer electronics with tight board space constraints. IC Role / Device Role / Timing Role: High-side sink switch enabling common-anode display multiplexing with precise on/off timing. Use Value: Delivers consistent −100 mA drive across segments while maintaining <150 mV saturation drop for uniform brightness. |
| Logic-Level Signal Translation | Small Relay Driver |
Use Scenario: Converting 1.8 V/3.3 V logic outputs to 5 V/12 V compatible signals for legacy peripherals. IC Role / Device Role / Timing Role: Level-shifting switch translating low-voltage control into higher-voltage load activation. Use Value: Built-in R1/R2 ratio ensures stable turn-on at VI(on) ≤ −1.1 V, avoiding marginal switching near logic thresholds. |
Use Scenario: Activating 5 V/12 V electromagnetic relays in industrial sensor modules with microcontroller supervision. IC Role / Device Role / Timing Role: Load switch isolating MCU from inductive relay coil back-EMF via collector-emitter path. Use Value: −50 V VCEO rating provides 2× safety margin above 24 V relay coils, preventing breakdown during flyback transients. |
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 |
|---|---|---|---|
| PDTC124XT | NPN complement with identical R1/R2 values and SOT23 package; requires inverted logic drive. | Used where active-high control is preferred and load connects to ground side instead of supply side. | Select when circuit topology favors low-side switching or existing design uses NPN logic conventions. |
| BC857B,215 | Standard PNP BJT without integrated resistors; requires external R1/R2 (typically 10 kΩ/47 kΩ) for same function. | Offers higher hFE (120–250) but increases BOM count, layout area, and assembly cost. | Choose only if fine-tuned biasing or higher gain is required and additional components are acceptable. |
Compared with PDTC124XT, PDTA124XT enables high-side switching with non-inverted logic; versus BC857B, it reduces total solution size and assembly steps while trading minor hFE headroom for integration reliability.
Availability
PDTA124XT is available at Aetrix Electronics and suitable for microcontroller I/O interface, LED driver circuit, logic-level signal translation requiring stable component supply and long-term production continuity.
Supply support for PDTA124XT 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The PDTA124X series belongs to NXP's Resistor-Equipped Transistor (RET) product line, engineered specifically to simplify digital switching designs by integrating precision bias networks into standard SOT packages.
FAQ
What is the maximum allowable input voltage for PDTA124XT?
The absolute maximum input voltage (VI) is −40 V (negative) and +7 V (positive), defined per Table 6 Limiting Values. This range accommodates transient spikes and logic overshoot while protecting the internal R1/R2 network. Operation beyond these limits risks permanent damage to the integrated resistors or junction.
Can PDTA124XT replace BC857 in existing designs without layout changes?
Yes - PDTA124XT shares the same SOT23 (TO-236AB) footprint and pinout (pin 1 = base, pin 2 = emitter, pin 3 = collector) as BC857 variants. However, because it integrates R1/R2, external base resistors must be removed from the PCB to avoid double-biasing and ensure correct switching behavior.
Is PDTA124XT suitable for automotive applications?
No - the datasheet explicitly states NXP products are not warranted for use in automotive, aircraft, medical, or life-support equipment. PDTA124XT lacks AEC-Q101 qualification, and its storage temperature range (−65 °C to +150 °C) does not meet full automotive grade requirements.
What is the thermal resistance (Rth(j-a)) of PDTA124XT in free air?
The thermal resistance from junction to ambient is 500 K/W under standard FR4 PCB mounting conditions (single-sided copper, tin-plated, standard footprint), as specified in Table 7. This value assumes no heatsinking and defines the worst-case temperature rise per watt of dissipated power.
PDTA124XT,215 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 - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 22 kOhms
- Resistor - Emitter Base (R2):
- 47 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 80 @ 5mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 150mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- Frequency - Transition:
- -
- Power - Max:
- 250 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
PDTA124XT,215 FAQ
1.How can I place an order for PDTA124XT,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTA124XT,215 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 PDTA124XT,215 reliable?
The price and inventory of PDTA124XT,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTA124XT,215 is usually 5 days.
3.What payment methods are accepted for PDTA124XT,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTA124XT,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTA124XT,215?
PDTA124XT,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTA124XT,215 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 PDTA124XT,215?
For technical support, including PDTA124XT,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTA124XT,215 requirements.
6.How does Aetrix verify that PDTA124XT,215 is sourced from the original manufacturer or authorized distributors?
All PDTA124XT,215 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 PDTA124XT,215 meets industry standards.
7.What is the process for return or replacement of PDTA124XT,215?
All PDTA124XT,215 units undergo pre-shipment inspection (PSI). If there is an issue with PDTA124XT,215, 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 PDTA124XT,215 part is unused and in its original packaging.
Return procedure for PDTA124XT,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDTA124XT,215 Tags
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