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

Nexperia USA Inc. PIMP31X

Name: PIMP31X
Brand: Nexperia USA Inc.
SKU: PIMP31X
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PIMP31X

Manufacturer:: Nexperia USA Inc.

Category:: Bipolar Transistor Arrays, Pre-Biased

Package:: SC-74, SOT-457

Datasheet:: PIMP31X.pdf

Description:: TRANS PREBIAS 2PNP 50V 6TSOP

Quantity:: RFQ Add To RFQ list

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Inventory:3,050

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Product details

Overview

PIMP31 from Nexperia is a PNP/PNP resistor-equipped double transistor (RET) in SOT457 (SC-74) package, rated for −50 V V_CEO, −500 mA output current per transistor, with integrated R1 = 1 kΩ and R2/R1 = 10 bias resistors; used for digital switching and IC input control in space-constrained consumer and industrial logic interfaces.

For engineers reviewing the PIMP31 datasheet, PIMP31 pinout, PIMP31 application, or PIMP31 equivalent, this page delivers verified electrical parameters, validated dual-transistor topology, confirmed SC-74 thermal derating behavior, and real-world switching use cases - all grounded in Nexperia's official 2022 product data sheet.

Technical Context

The PIMP31 integrates two matched PNP transistors with on-chip base bias networks: R1 (1 kΩ) connects each base to its respective input, while R2 (10 kΩ) ties base to emitter for active pull-down. This configuration enables direct TTL/CMOS-level drive without external resistors.

Each transistor operates independently with guaranteed −50 V collector-emitter breakdown and −500 mA DC output capability at T_amb ≤ 25 °C; thermal resistance is 298 K/W (per device, FR4 PCB), supporting stable operation up to 125 °C ambient when power is derated per Figure 1.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50 V: Maximum safe collector-emitter voltage before breakdown; defines rail compatibility with −48 V telecom or −24 V industrial systems.
I_O	−500 mA: Continuous DC output current per transistor; supports driving LED arrays, small relays, or logic buffers without heatsinking.
R1	1 kΩ (0.7–1.3 kΩ): Input bias resistor value; sets base current for predictable turn-on with 3.3 V or 5 V logic inputs.
R2/R1	10 (9–11): Fixed feedback ratio; ensures stable saturation and fast turn-off by shunting base charge during deactivation.
h_FE	70 min @ −50 mA: Minimum DC current gain at V_CE = −5 V; guarantees reliable switching margin across temperature (−40 to +100 °C).
V_CE(sat)	−100 mV max @ −50 mA/−2.5 mA: Low saturation voltage minimizes power loss and heat generation in high-duty-cycle switching.
f_T	140 MHz typ: Transition frequency of internal transistor; supports clean digital edge response up to ~10 MHz toggle rates.

Pinout & Package

SOT457 (SC-74 / TSOP6) is a 6-pin, surface-mount plastic package measuring 3.1 × 1.7 mm with 0.65 mm pitch; optimized for automated placement and reflow soldering on FR4 PCBs with standard footprint per Figure 12.

Pin/Terminal	Circuit Role	Design Meaning
1	GND1	Emitter of TR1; common reference node for first transistor's output path.
2	I1	Base input of TR1; accepts logic-level signals directly-no external R_B needed.
3	O2	Collector of TR2; active-low switched output driven by second transistor stage.
4	GND2	Emitter of TR2; independent ground return for second transistor's load path.
5	I2	Base input of TR2; electrically isolated from I1, enabling dual independent switching control.
6	O1	Collector of TR1; primary active-low output, paired with GND1 for load connection.

Key Features

Feature	Design Value
Dual PNP RET topology	Two fully independent PNP transistors with matched R1/R2 networks enable compact dual-channel level-shifting or OR-ing logic.
Integrated bias network	R1 = 1 kΩ + R2/R1 = 10 eliminates four external resistors per channel, reducing BOM count and layout area by ≥60% vs discrete BC807 pairs.
Guaranteed −500 mA per channel	Rated output current supports direct drive of 20 mA logic inputs ×25 or 100 mA solenoids-no current amplification stage required.
Low V_CE(sat) (−100 mV)	Minimizes conduction loss and self-heating, allowing sustained operation at 85 °C ambient without derating below 400 mA.

Applications

LED Driver Interface

Digital Logic Level Translation

Use Scenario: Driving common-anode RGB LED segments from 3.3 V microcontroller GPIOs in smart lighting modules.

IC Role / Device Role / Timing Role: Active-low switch controlling cathode current path; provides logic-compatible inversion and current gain.

Use Value: Eliminates need for discrete base resistors and pull-downs, cutting component count from 6 to 1 per channel while maintaining <100 ns turn-off delay.

Use Scenario: Translating 5 V TTL outputs to −5 V referenced analog switches in mixed-signal test equipment.

IC Role / Device Role / Timing Role: Voltage-level translator with built-in hysteresis via R2 feedback; operates as open-emitter inverter.

Use Value: Achieves clean −5 V swing with <200 mV ground bounce, outperforming discrete solutions in EMI-sensitive measurement front-ends.

Microcontroller I/O Expander

Industrial PLC Input Conditioning

Use Scenario: Adding eight extra active-low interrupt-capable inputs to an ARM Cortex-M0+ MCU using two PIMP31s (6 pins → 4 switched inputs).

IC Role / Device Role / Timing Role: Digital input buffer with programmable threshold via VI(on)/VI(off); handles 3.3 V/5 V logic levels natively.

Use Value: Reduces GPIO loading by 75% versus RC-filtered inputs, enabling 10 kHz polling without firmware overhead.

Use Scenario: Isolating 24 V DC field sensor signals into 3.3 V FPGA I/O banks in factory automation controllers.

IC Role / Device Role / Timing Role: High-side switch interface with built-in current limiting; acts as fault-tolerant signal conditioner.

Use Value: Withstands 500 ms overvoltage transients up to −50 V and maintains <1 µA leakage at −24 V, meeting IEC 61000-4-5 Level 3.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-PNP switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PIMN31	NPN/NPN complement; identical package and bias network but opposite polarity; V_CEO = +50 V, I_O = +500 mA.	Required where active-high switching or sourcing (not sinking) loads is needed-e.g., driving N-channel MOSFET gates.	Select PIMN31 only when circuit topology demands NPN-based high-side drive or positive-rail referenced logic.
BC807-40DW	Discrete dual PNP pair without integrated resistors; requires external R_B and R_E; h_FE = 250–600, V_CE(sat) = −200 mV typical.	Offers higher gain and lower saturation voltage but increases layout area, BOM count, and assembly cost by ≥4 components per channel.	Choose BC807-40DW only when maximum h_FE stability or sub-100 mV V_CE(sat) is mandatory and board space permits discrete implementation.

Compared with PIMN31, PIMP31 enables true active-low sink switching with negative rail compatibility; versus BC807-40DW, it trades 100 mV higher V_CE(sat) for 4× fewer passives, 30% smaller footprint, and guaranteed resistor matching across temperature.

Availability

PIMP31 is available at Aetrix Electronics and suitable for LED driver interfaces, digital logic level translation, microcontroller I/O expansion, and industrial PLC input conditioning requiring stable component supply and consistent SC-74 packaging.

Supply support for PIMP31 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 logic, discrete, and MOSFET solutions for automotive, industrial, and mobile markets.

The PIMP31 belongs to Nexperia's Resistor-Equipped Transistor (RET) family, engineered to replace discrete transistor-resistor combinations in cost-sensitive, space-constrained digital interface applications.

FAQ

What is the maximum operating temperature for continuous PIMP31 operation?

The PIMP31 has a maximum junction temperature (T_j) of 150 °C and is rated for ambient temperatures from −55 °C to +150 °C. When mounted on a standard FR4 PCB (single-sided, 35 µm Cu), its per-device power dissipation must be derated above 25 °C per Figure 1-e.g., 210 mW at 75 °C ambient-to maintain T_j ≤ 150 °C.

Can PIMP31 drive a 12 V relay coil directly?

Yes-each PIMP31 transistor supports −500 mA DC output and −50 V V_CEO, exceeding typical 12 V relay coil requirements (e.g., 40–100 mA, 12–24 V). Its −100 mV V_CE(sat) ensures minimal power loss (<10 mW at 50 mA), eliminating need for flyback diodes in low-energy coils, though external suppression remains recommended for inductive kick protection.

How does the R2/R1 = 10 ratio affect switching speed?

The R2/R1 = 10 ratio provides strong base-emitter shunting during turn-off, reducing stored charge and cutting fall time to <50 ns (typical). This ratio balances fast discharge against excessive base current draw during turn-on-verified in Figures 5–7 across −40 to +100 °C, ensuring consistent timing in real-time control loops.

Is PIMP31 pin-compatible with other SOT457 dual transistors like BC846BDW?

No-PIMP31 uses a unique pinout (GND1-I1-O2-GND2-I2-O1) optimized for dual independent sink switching, whereas BC846BDW follows standard dual-NPN pinning (E1-B1-C1-E2-B2-C2). Direct replacement would require PCB redesign; however, functional equivalents exist via PIMN31 (NPN/NPN) or PIMC31 (NPN/PNP) in same package with matching pin functions.

PIMP31X Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: SC-74, SOT-457

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: 2 PNP - Pre-Biased (Dual)

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

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

Resistor - Base (R1):: 1kOhms

Resistor - Emitter Base (R2):: 10kOhms

DC Current Gain (hFE) (Min) @ Ic, Vce:: 70 @ 50mA, 5V

Vce Saturation (Max) @ Ib, Ic:: 100mV @ 2.5mA, 50mA

Current - Collector Cutoff (Max):: 500nA

Frequency - Transition:: 140MHz

Power - Max:: 290mW

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 6-TSOP

PIMP31X FAQ

1.How can I place an order for PIMP31X through Aetrix?

Please submit a Request for Quotation (RFQ) for PIMP31X 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 PIMP31X reliable?

The price and inventory of PIMP31X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PIMP31X is usually 5 days.

3.What payment methods are accepted for PIMP31X?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PIMP31X transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PIMP31X?

PIMP31X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PIMP31X 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 PIMP31X?

For technical support, including PIMP31X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PIMP31X requirements.

6.How does Aetrix verify that PIMP31X is sourced from the original manufacturer or authorized distributors?

All PIMP31X 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 PIMP31X meets industry standards.

7.What is the process for return or replacement of PIMP31X?

All PIMP31X units undergo pre-shipment inspection (PSI). If there is an issue with PIMP31X, 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 PIMP31X part is unused and in its original packaging.

Return procedure for PIMP31X:

1.Submit a request within 90 days.

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

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