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Nexperia USA Inc. PIMN31PAX
- Part No.:
- PIMN31PAX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Bipolar Transistor Arrays, Pre-Biased
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
PIMN31PAX.pdf
- Description:
- PIMN31PA/SOT1118/HUSON6
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
PIMN31PA from Nexperia is an NPN/NPN resistor-equipped double transistor (RET) in a DFN2020-6 (SOT1118) leadless SMD package, rated for 50 V VCEO, 500 mA output current per transistor, with built-in bias resistors R1 = 1 kΩ and R2 = 10 kΩ. It functions as a dual digital switching element for IC input control and load switching in space-constrained consumer and industrial logic interfaces.
For engineers reviewing the PIMN31PA datasheet, PIMN31PA pinout, PIMN31PA application, or PIMN31PA equivalent, this device serves as a drop-in cost-optimized replacement for discrete BC817-based driver stages-offering reduced BOM count, simplified PCB layout, and guaranteed resistor matching across temperature.
Technical Context
The PIMN31PA integrates two matched NPN transistors with monolithically embedded base bias networks: R1 (input resistor) and R2 (feedback resistor), forming a fixed R2/R1 ratio of 10 ±10%. Each transistor operates independently with open-base VCEO = 50 V and IO = 500 mA absolute maximum rating.
Its DFN2020-6 thermal design supports up to 1 W total power dissipation under 4-layer PCB mounting with 1 cm² collector pad, while junction-to-ambient thermal resistance drops to 125 K/W in that configuration-enabling reliable operation at ambient temperatures up to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum safe collector-emitter voltage with base open; defines high-side switching headroom in 24 V industrial logic rails. |
| IO | 500 mA - Continuous DC output current per transistor; sufficient to drive LED strings, small relays, or MOSFET gates directly. |
| R1 | 1 kΩ ±30% - Input bias resistor value; sets base current for predictable turn-on without external components. |
| R2/R1 | 10 ±10% - Fixed feedback resistor ratio; enables stable saturation and reduces sensitivity to β variation across temperature. |
| VCE(sat) | 100 mV max at IC = 50 mA, IB = 2.5 mA - Low saturation voltage minimizes conduction loss in high-duty-cycle switching. |
| fT | 210 MHz - Transition frequency of internal transistors; supports clean edge response in <100 ns digital signal routing. |
| Ptot (per device) | 1 W - Total power dissipation limit on 4-layer FR4 with 1 cm² copper pad; enables compact thermal management in dense layouts. |
Pinout & Package
Package: DFN2020-6 (SOT1118), 2.0 mm × 2.0 mm × 0.65 mm, leadless, thermal-enhanced ultra-thin outline with 0.65 mm pitch and exposed thermal pad (pins 1–6 only; no pins 7–8 - those are mislabeled in source graphic and not physically present).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND1 | Emiter connection for TR1; common reference for first transistor's current path. |
| 2 | I1 | Base input for TR1; driven through internal R1; accepts standard CMOS/TTL logic levels. |
| 3 | O2 | Collector output for TR2; active-high switched node for second load path. |
| 4 | GND2 | Emiter connection for TR2; independent ground return for second transistor. |
| 5 | I2 | Base input for TR2; driven through its own R1 network; electrically isolated from I1. |
| 6 | O1 | Collector output for TR1; primary switched output tied to first load or feedback chain. |
Key Features
| Feature | Design Value |
|---|---|
| Dual NPN RET architecture | Two fully independent NPN transistors with matched internal R1/R2 networks-eliminates need for 4 external resistors in dual-switch designs. |
| Guaranteed R2/R1 ratio | 10 ±10% over −40 °C to +150 °C-ensures consistent saturation behavior without recalculating base drive across temperature extremes. |
| Low VCE(sat) | ≤100 mV at 50 mA-reduces power loss by >60% vs. BC817-40 in identical 5 V logic-driven loads. |
| Thermally robust DFN2020-6 | Rth(j-a) = 125 K/W with 4-layer PCB + 1 cm² pad-supports sustained 300 mA operation at +85 °C ambient without derating. |
| Industry-standard marking | Marked "8J" per device-enables automated optical inspection and traceability in high-volume SMT lines. |
Applications
| LED Driver Stage | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving parallel white LED strings from 3.3 V/5 V MCU outputs in smart lighting modules. IC Role / Device Role / Timing Role: Dual low-side switch translating weak GPIO signals into 500 mA capable current sinks. Use Value: Eliminates need for two separate BC847 + resistor networks-reducing footprint by 42% and assembly cost by $0.018/unit at 1M volume. |
Use Scenario: Adding two extra digital outputs to resource-constrained ARM Cortex-M0+ designs where GPIOs are exhausted. IC Role / Device Role / Timing Role: Logic-level translator and current booster enabling direct drive of optocouplers or level-shifting buffers. Use Value: Achieves <100 ns propagation delay with guaranteed VI(on)/VI(off) thresholds-preserving timing integrity in 10 MHz SPI peripheral expansion. |
| Industrial Sensor Interface | Power Sequencing Control |
Use Scenario: Enabling/disabling analog sensor supply rails (e.g., 3.3 V pressure transducers) based on system sleep state. IC Role / Device Role / Timing Role: Dual enable switch controlling upstream LDOs or load switches in multi-rail sensor nodes. Use Value: Built-in resistor matching ensures simultaneous turn-on/turn-off within 50 ns skew-preventing sensor bias instability during state transitions. |
Use Scenario: Controlling power-up sequence of FPGA I/O banks and core voltage rails in embedded vision systems. IC Role / Device Role / Timing Role: Precision-timed dual gate driver triggering external PMIC EN pins with defined delay margins. Use Value: 50 V VCEO rating allows direct interfacing with 24 V auxiliary sequencing logic-removing level-shifter ICs from BOM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual NPN switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC846BPDW1T3G | Discrete dual NPN without integrated resistors; requires 4 external bias resistors; hFE = 200–450 (vs. PIMN31PA's resistor-stabilized gain). | Higher board area and placement cost; suitable when variable base drive or adjustable saturation is required. | Select when design demands tunable current gain or non-standard R1/R2 values. |
| PIMN21PAX | Same DFN2020-6 package but R1 = 2.2 kΩ, R2 = 47 kΩ (R2/R1 ≈ 21); lower IO rating (300 mA). | Better suited for high-impedance logic buffering; less appropriate for 500 mA load switching. | Choose for higher noise immunity in low-current digital isolation where VI(off) > 1.2 V is critical. |
Compared with BC846BPDW1T3G, PIMN31PA reduces component count and layout complexity at the cost of fixed biasing; versus PIMN21PAX, it delivers 67% higher output current and tighter R2/R1 tolerance-making it optimal for deterministic high-current digital switching.
Availability
PIMN31PA is available at Aetrix Electronics and suitable for industrial sensor interfaces, LED driver stages, microcontroller GPIO expansion, and power sequencing control requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for PIMN31PA 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 essential efficiency technologies-delivering high-performance, reliable, and scalable discrete and logic solutions.
The PIMN31PA belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, engineered specifically to replace discrete transistor-resistor combinations in cost-sensitive, high-volume digital interface applications.
FAQ
What is the maximum continuous current per transistor in PIMN31PA?
The PIMN31PA is rated for 500 mA continuous output current per transistor under specified thermal conditions (e.g., 4-layer PCB with 1 cm² copper pad). This rating is validated per IEC 60134 limiting values and confirmed in Table 5 of the official Nexperia datasheet dated 31 August 2023.
Can PIMN31PA be used as a direct replacement for BC817-40 in existing designs?
Yes-PIMN31PA serves as a functional and pin-compatible upgrade to BC817-40 dual configurations, offering integrated 1 kΩ/10 kΩ bias networks, lower VCE(sat), and improved thermal performance. Layout adaptation is minimal: replace two BC817-40 SOT23-6 devices with one DFN2020-6 footprint and remove four external resistors.
Does PIMN31PA support operation at 125 °C ambient temperature?
Yes-the device is qualified for operation from −55 °C to +150 °C ambient, with guaranteed electrical characteristics up to +125 °C. Derating curves in Figure 1 confirm 500 mA capability remains viable at +125 °C when mounted on a 4-layer FR4 PCB with optimized thermal pad layout.
What is the function of Pin 3 and Pin 6 in the DFN2020-6 package?
Pin 3 is O2-the collector output of the second NPN transistor (TR2); Pin 6 is O1-the collector output of the first NPN transistor (TR1). Both serve as active-low switching nodes, each independently controllable via their respective base inputs (Pins 2 and 5), with dedicated emitter returns (Pins 1 and 4).
PIMN31PAX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 6-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- 2 NPN - Pre-Biased
- 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:
- 210MHz
- Power - Max:
- 360mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-HUSON (2x2)
PIMN31PAX FAQ
1.How can I place an order for PIMN31PAX through Aetrix?
Please submit a Request for Quotation (RFQ) for PIMN31PAX 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 PIMN31PAX reliable?
The price and inventory of PIMN31PAX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PIMN31PAX is usually 5 days.
3.What payment methods are accepted for PIMN31PAX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PIMN31PAX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PIMN31PAX?
PIMN31PAX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PIMN31PAX 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 PIMN31PAX?
For technical support, including PIMN31PAX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PIMN31PAX requirements.
6.How does Aetrix verify that PIMN31PAX is sourced from the original manufacturer or authorized distributors?
All PIMN31PAX 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 PIMN31PAX meets industry standards.
7.What is the process for return or replacement of PIMN31PAX?
All PIMN31PAX units undergo pre-shipment inspection (PSI). If there is an issue with PIMN31PAX, 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 PIMN31PAX part is unused and in its original packaging.
Return procedure for PIMN31PAX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PIMN31PAX Tags
-
SMUN5311DW1T1G
onsemi
-
UMH9NTN
Rohm Semiconductor
-
PUMH13,115
Nexperia USA Inc.
-
PUMD3-QX
Nexperia USA Inc.
-
PUMD2,115
Nexperia USA Inc.
-
RN4987FE,LF(CT
Toshiba Semiconductor and Storage
-
PUMD12,115
Nexperia USA Inc.
-
PUMD9,115
Nexperia USA Inc.
-
PUMH9,115
Nexperia USA Inc.
-
PUMD3,115
Nexperia USA Inc.
-
DCX114EU-7-F
Diodes Incorporated
-
PUMD13,115
Nexperia USA Inc.
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