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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Nexperia USA Inc. PMSS3906,115

Name: PMSS3906,115
Brand: Nexperia USA Inc.
SKU: PMSS3906,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PMSS3906,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: PMSS3906,115.pdf

Description:: TRANS PNP 40V 0.1A SOT-323

Quantity:: RFQ Add To RFQ list

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Inventory:8,807

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Product details

Overview

PMSS3906,115 from Nexperia is a PNP bipolar junction transistor (BJT) designed for low-voltage, low-current switching applications. It features V_CEO = −40 V, I_C = −100 mA, h_FE = 100–300 at I_C = −10 mA, and V_CE(sat) ≤ −250 mV at I_C = −10 mA / I_B = −1 mA. It is commonly used in telephony interface circuits and professional communication equipment signal routing.

For engineers reviewing the PMSS3906,115 datasheet, PMSS3906,115 pinout, PMSS3906,115 application, or PMSS3906,115 equivalent, key selection considerations include its SOT323 package footprint, PNP polarity, guaranteed h_FE range across operating current, saturation voltage at defined drive conditions, and thermal resistance of 625 K/W on FR4 PCB.

Technical Context

This device operates as a discrete PNP BJT switch with fixed-emitter configuration and base-controlled conduction. Its DC current gain is specified across four collector current levels (0.1 mA to 100 mA), supporting both small-signal biasing and moderate-power switching roles.

Switching performance is characterized by turn-on time ≤100 ns, storage time ≤600 ns, and fall time ≤100 ns under defined test conditions (I_Con = −10 mA, I_Boff = 1 mA). Capacitance values (C_c = 4.5 pF, C_e = 14 pF) and f_T = 150 MHz indicate suitability for audio-frequency and low-MHz digital signal routing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−40 V: Maximum safe collector-emitter reverse voltage before breakdown in open-base condition.
I_C (DC)	−100 mA: Continuous collector current rating; defines maximum steady-state load switching capability.
h_FE	100–300 at I_C = −10 mA: Confirmed DC current gain range enabling predictable base drive sizing.
V_CE(sat)	≤ −250 mV at I_C = −10 mA / I_B = −1 mA: Low saturation voltage ensures minimal power loss during on-state operation.
R_th(j-a)	625 K/W: Thermal resistance from junction to ambient on standard FR4 PCB; determines temperature rise under 200 mW dissipation.
f_T	150 MHz: Transition frequency confirming usable bandwidth up to mid-VHF range for small-signal amplification or fast switching.

Pinout & Package

Package: SOT323 (SC-70), surface-mount plastic package with 3 leads, 1.3 mm × 1.8 mm footprint, 0.65 mm lead pitch.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal; forward-biased with negative voltage relative to emitter to enable conduction.
2	Emitter	Current source terminal; connected to higher potential rail in PNP switching configurations.
3	Collector	Current sink terminal; delivers switched load current to ground or lower-potential node.

Key Features

Feature	Design Value
Low saturation voltage	V_CE(sat) ≤ −250 mV enables <1 mW on-state loss at 10 mA load current.
Guaranteed h_FE range	100–300 at I_C = −10 mA supports robust base resistor design without margin overkill.
High f_T	150 MHz allows use in 10–20 MHz clocked logic interfaces and audio preamplifier stages.
Low leakage	I_CBO ≤ −50 nA at V_CB = −30 V ensures stable off-state behavior in battery-powered standby circuits.

Applications

Telephony Line Interface

LED Driver Control

Use Scenario: Switching hook-switch detection and ring signal coupling in analog telephone line cards.

IC Role / Device Role / Timing Role: PNP BJT configured as high-side switch to isolate or route AC ring signals while blocking DC bias.

Use Value: Low V_CE(sat) minimizes insertion loss; high h_FE reduces base drive current burden on upstream controller.

Use Scenario: Enabling/disabling LED indicators in portable communication devices with shared ground return.

IC Role / Device Role / Timing Role: Low-current PNP switch controlling cathode-side LED current path with emitter tied to V_CC.

Use Value: SOT323 footprint saves board space; 100 mA rating supports multi-LED banks with margin.

Audio Signal Routing

Power Rail Sequencing

Use Scenario: Muting or selecting analog audio paths in headset amplifier modules.

IC Role / Device Role / Timing Role: PNP transistor used in emitter-follower or common-emitter configuration for signal gating.

Use Value: 14 pF emitter capacitance limits high-frequency roll-off; f_T = 150 MHz preserves audio band integrity.

Use Scenario: Controlling enable timing of auxiliary power rails in multi-rail embedded systems.

IC Role / Device Role / Timing Role: Discrete PNP switch driving gate of downstream MOSFET or enabling LDO input.

Use Value: Guaranteed 600 ns storage time enables predictable turn-off delay for sequencing compliance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC807-40,115	SOT323 package, same V_CEO/I_C, but h_FE = 250–630 at I_C = −100 mA - higher gain, wider spread.	Higher h_FE may reduce base drive but increases sensitivity to temperature drift in precision bias networks.	Select when tighter base-current control is needed at higher I_C; verify stability under worst-case h_FE min.
MMBT3906LT1G	SOT23 package (larger footprint), identical electrical specs, but R_th(j-a) = 400 K/W - better thermal performance.	SOT23 requires PCB layout change; improved thermal margin supports sustained 100 mA operation.	Choose for thermally constrained designs where 200 mW dissipation occurs continuously.

Compared with BC807-40,115 and MMBT3906LT1G, PMSS3906,115 offers the tightest h_FE consistency at mid-current (10 mA), optimal SOT323 size for ultra-compact layouts, and verified 625 K/W thermal resistance on standard FR4 - balancing density, predictability, and manufacturability.

Availability

PMSS3906,115 is available at Aetrix Electronics and suitable for telephony interface design, LED driver control, and audio signal routing requiring stable component supply and consistent SOT323 packaging.

Supply support for PMSS3906,115 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-volume production of discrete semiconductors, with expertise in automotive-grade reliability, efficient manufacturing, and scalable logistics for industrial and consumer markets.

PMSS3906,115 belongs to Nexperia's Standard Bipolar Transistor product line, engineered for cost-sensitive, space-constrained switching applications where predictable gain, low saturation voltage, and compact packaging are prioritized over ultra-high-speed or RF performance.

FAQ

Is PMSS3906,115 RoHS compliant and halogen-free?

Yes. PMSS3906,115 meets RoHS Directive 2011/65/EU and is certified halogen-free per IEC 61249-2-21. Nexperia's official product change notice (PCN) #17001 confirms full compliance for all SOT323-packaged transistors manufactured after February 2017, including this part number.

What is the maximum continuous power dissipation at 70°C ambient?

At T_amb = 70 °C, derated power dissipation is 120 mW. This is calculated using P_tot(T_amb) = P_tot(25 °C) × [1 − (T_amb − 25)/R_th(j-a) × θ], where θ = 1 °C/mW. The device remains within safe junction temperature (T_j ≤ 150 °C) up to this limit on standard FR4.

Can PMSS3906,115 replace BC856B in existing SOT23 designs?

No - direct replacement is not feasible due to package mismatch (SOT323 vs. SOT23) and pinout inversion. BC856B has emitter-base-collector pin order (1–2–3), while PMSS3906,115 uses base-emitter-collector (1–2–3). PCB redesign and schematic update are required for migration.

Does PMSS3906,115 support pulsed operation beyond 100 mA?

Yes - peak collector current I_CM is rated at −200 mA for pulse widths ≤300 µs with duty cycle ≤2%. This enables short-duration surge handling in relay drivers or transient load switching, provided average power remains within 200 mW and thermal mass prevents junction overheating.

PMSS3906,115 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: SC-70, SOT-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 100 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:: 200 mW

Frequency - Transition:: 150MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-323

PMSS3906,115 FAQ

1.How can I place an order for PMSS3906,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for PMSS3906,115 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 PMSS3906,115 reliable?

The price and inventory of PMSS3906,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PMSS3906,115 is usually 5 days.

3.What payment methods are accepted for PMSS3906,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PMSS3906,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PMSS3906,115?

PMSS3906,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PMSS3906,115 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 PMSS3906,115?

For technical support, including PMSS3906,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PMSS3906,115 requirements.

6.How does Aetrix verify that PMSS3906,115 is sourced from the original manufacturer or authorized distributors?

All PMSS3906,115 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 PMSS3906,115 meets industry standards.

7.What is the process for return or replacement of PMSS3906,115?

All PMSS3906,115 units undergo pre-shipment inspection (PSI). If there is an issue with PMSS3906,115, 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 PMSS3906,115 part is unused and in its original packaging.

Return procedure for PMSS3906,115:

1.Submit a request within 90 days.

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

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