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Nexperia USA Inc. PMBT3906,235
- Part No.:
- PMBT3906,235
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PMBT3906,235.pdf
- Description:
- TRANS PNP 40V 0.2A TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:76,218
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Product details
Overview
PMBT3906,235 from Nexperia is a PNP bipolar junction transistor in SOT23 (TO-236AB) package, rated for −40 V VCEO, −200 mA IC, and 250 mW Ptot, used as a general-purpose switching device in low-voltage logic-level interface circuits and discrete amplifier stages.
For engineers reviewing the PMBT3906,235 datasheet, PMBT3906,235 pinout, PMBT3906,235 application, or PMBT3906,235 equivalent, key selection criteria include verified PNP polarity, SOT23 footprint compatibility, guaranteed −40 V breakdown, −200 mA DC current handling, and thermal resistance of 500 K/W on FR4 PCB.
Technical Context
This discrete PNP transistor operates with open-base collector-emitter voltage up to −40 V and supports continuous collector current up to −200 mA at Tamb ≤ 25 °C. Its DC current gain (hFE) ranges from 60 at IC = −0.1 mA to 300 at IC = −10 mA, with saturation voltages specified at −250 mV (VCEsat) and −850 mV (VBEsat) under defined drive conditions.
Switching performance includes turn-on time ≤ 70 ns, turn-off time ≤ 300 ns, and transition frequency fT = 250 MHz at VCE = −20 V and IC = −10 mA. Thermal resistance from junction-to-ambient is 500 K/W when mounted on standard FR4 PCB - a critical parameter for power dissipation in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −40 V: Maximum safe collector-emitter voltage with base open; defines high-side switch blocking capability in ≤40 V systems. |
| IC | −200 mA: Continuous DC collector current rating; supports load switching up to ~200 mA in logic-driven circuits. |
| Ptot | 250 mW at Tamb ≤ 25 °C: Total power dissipation limit; constrains usable current/voltage combinations on FR4 PCB without heatsinking. |
| hFE | 60–300: DC current gain range across IC = −0.1 mA to −10 mA; enables predictable base drive sizing for saturation in switching designs. |
| VCEsat | −250 mV at IC = −10 mA / IB = −1 mA: Low saturation voltage ensures minimal conduction loss and efficient switching in low-voltage rails. |
| fT | 250 MHz: Transition frequency at VCE = −20 V, IC = −10 mA; confirms suitability for RF preamp or high-speed digital interface applications. |
| Rth(j-a) | 500 K/W: Junction-to-ambient thermal resistance on FR4; determines temperature rise per watt - essential for reliability in sealed enclosures. |
Pinout & Package
SOT23 (TO-236AB) surface-mount plastic package: 3-terminal, 1.3 mm × 2.9 mm footprint, 1.1 mm height, designed for automated pick-and-place assembly and reflow soldering on standard PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control input terminal; requires negative bias relative to emitter to forward-bias base-emitter junction and enable conduction. |
| 2 | Emitter | Current source terminal for PNP operation; typically tied to higher potential rail (e.g., VCC) in high-side switch configurations. |
| 3 | Collector | Output terminal; sinks current from load to ground or lower-potential node when transistor is saturated. |
Key Features
| Feature | Design Value |
|---|---|
| PNP polarity with −40 V VCEO | Enables high-side switching in 3.3 V/5 V/12 V systems where load connects between supply and collector. |
| Low VCEsat (−250 mV) | Reduces power loss and self-heating during on-state operation, improving efficiency in battery-powered interfaces. |
| Fast switching (toff ≤ 300 ns) | Supports PWM frequencies up to ~300 kHz in discrete motor drivers or LED dimming circuits without excessive delay. |
| hFE ≥ 100 at IC = −10 mA | Allows use of high-value base resistors (e.g., 10 kΩ), reducing MCU GPIO current demand and simplifying drive circuitry. |
| SOT23 package compatibility | Ensures drop-in replacement with industry-standard footprints and compatibility with existing reflow profiles and AOI inspection. |
Applications
| Logic-Level High-Side Switch | Discrete Inverter Stage |
|---|---|
|
Use Scenario: Driving 5 V relay coil or optocoupler input from microcontroller GPIO operating at 3.3 V logic levels. IC Role / Device Role / Timing Role: PNP transistor acts as active-high level shifter and current sink, enabling 5 V load control from 3.3 V signal. Use Value: −250 mV VCEsat minimizes voltage drop across transistor, ensuring ≥4.7 V reaches relay coil for reliable activation. |
Use Scenario: Building non-inverting buffer stage in analog sensor signal conditioning chain using discrete transistors. IC Role / Device Role / Timing Role: Configured as common-emitter amplifier with fixed bias, providing voltage gain and impedance transformation. Use Value: hFE = 100–300 at IC = −10 mA enables stable DC bias point and predictable small-signal gain in low-noise front-end designs. |
| LED Current Sink Driver | Power Rail Sequencing Control |
|
Use Scenario: Controlling multiple indicator LEDs in automotive dashboard modules requiring discrete, cost-optimized drive. IC Role / Device Role / Timing Role: PNP switch placed between 12 V supply and LED anode, with cathode grounded via current-limiting resistor. Use Value: −200 mA IC rating supports driving up to three 20 mA LEDs in parallel while maintaining safe thermal margin on FR4. |
Use Scenario: Enabling controlled power-up sequence of FPGA core and I/O banks using discrete voltage-rail supervisors. IC Role / Device Role / Timing Role: Used in discrete reset hold-off circuit to delay enable signal until secondary rail stabilizes. Use Value: Fast toff ≤ 300 ns ensures precise timing window control (<1 µs resolution) for sequencing critical power domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP switching transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBT3906 | Same electrical specs and SOT23 package; differs only in marking code and minor process revision; identical Rth(j-a) and switching times. | No functional difference; accepted interchangeably in all legacy and new designs per manufacturer cross-reference. | Select MMBT3906 when sourcing from ON Semiconductor or when BOM mandates dual-sourcing across Nexperia and ON Semi lines. |
| PZT3906 | Higher Ptot = 500 mW and TO-92 package; larger thermal mass but incompatible SMT footprint; VCEO and hFE match within tolerance. | Requires through-hole PCB layout change; suitable only where manual assembly or higher power dissipation (>250 mW) is required. | Choose PZT3906 only if thermal budget exceeds 250 mW or if legacy through-hole design must be maintained without board revision. |
Compared with MMBT3906 and PZT3906, PMBT3906,235 offers optimal SMT manufacturability and thermal performance for space-constrained 250 mW switching, while MMBT3906 provides second-source flexibility and PZT3906 serves niche through-hole or higher-power needs.
Availability
PMBT3906,235 is available at Aetrix Electronics and suitable for logic-level interface, discrete amplifier staging, and LED driver applications requiring stable component supply, consistent SOT23 footprint, and guaranteed −40 V/−200 mA ratings.
Supply support for PMBT3906,235 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-grade and industrial MOSFETs, diodes, and bipolar transistors.
The PMBT3906 belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-sensitive, high-yield manufacturing of consumer, computing, and industrial control circuits requiring robust PNP switching performance.
FAQ
What is the maximum allowable collector-emitter voltage for PMBT3906,235?
The absolute maximum collector-emitter voltage (VCEO) is −40 V with the base open, as confirmed in Table 5 of the Nexperia datasheet Rev. 06. This rating applies under steady-state DC conditions and must not be exceeded even transiently to prevent junction breakdown or permanent damage.
Can PMBT3906,235 replace PMBT3904 in a circuit?
No - PMBT3906,235 is a PNP transistor while PMBT3904 is its NPN complement. Swapping them without circuit redesign will reverse bias conditions and prevent proper operation. They are complementary, not interchangeable, and serve opposite roles in push-pull or level-shifting topologies.
What is the typical DC current gain at 10 mA collector current?
At IC = −10 mA and VCE = −1 V, the typical DC current gain (hFE) is 100–300, as specified in Table 7 of the datasheet. This range reflects process variation and supports reliable base resistor calculation for saturation in switching applications.
Is PMBT3906,235 suitable for RF amplification up to 200 MHz?
Yes - with fT = 250 MHz at VCE = −20 V and IC = −10 mA, the device supports small-signal amplification in HF bands up to ~200 MHz. However, noise figure is 4 dB at 10 Hz–15.7 kHz, so it is not optimized for low-noise RF front-ends above 100 MHz.
PMBT3906,235 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):
- 200 mA
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 400mV @ 5mA, 50mA
- Current - Collector Cutoff (Max):
- 50nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 10mA, 1V
- Power - Max:
- 250 mW
- Frequency - Transition:
- 250MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
PMBT3906,235 FAQ
1.How can I place an order for PMBT3906,235 through Aetrix?
Please submit a Request for Quotation (RFQ) for PMBT3906,235 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 PMBT3906,235 reliable?
The price and inventory of PMBT3906,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PMBT3906,235 is usually 5 days.
3.What payment methods are accepted for PMBT3906,235?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PMBT3906,235 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PMBT3906,235?
PMBT3906,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PMBT3906,235 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 PMBT3906,235?
For technical support, including PMBT3906,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PMBT3906,235 requirements.
6.How does Aetrix verify that PMBT3906,235 is sourced from the original manufacturer or authorized distributors?
All PMBT3906,235 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 PMBT3906,235 meets industry standards.
7.What is the process for return or replacement of PMBT3906,235?
All PMBT3906,235 units undergo pre-shipment inspection (PSI). If there is an issue with PMBT3906,235, 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 PMBT3906,235 part is unused and in its original packaging.
Return procedure for PMBT3906,235:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PMBT3906,235 Tags
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MMBT3906LT1G
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MMBT3904-7-F
Diodes Incorporated
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Diodes Incorporated
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MMBT3904-TP
Micro Commercial Co
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MMBT2222A-7-F
Diodes Incorporated
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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MMBT2222A-TP
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