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

Nexperia USA Inc. PMSS3904,135

Name: PMSS3904,135
Brand: Nexperia USA Inc.
SKU: PMSS3904,135
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PMSS3904,135

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: PMSS3904,135.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PMSS3904,135 from Nexperia is an NPN silicon switching transistor in SC-70 (SOT323) package, rated for 40 V V_CEO, 100 mA I_C, and 200 mW P_tot, with DC current gain h_FE = 100–300 at I_C = 10 mA, used in low-power signal switching and amplification circuits in telephony interfaces and portable communication modules.

For engineers reviewing the PMSS3904,135 datasheet, PMSS3904,135 pinout, PMSS3904,135 application, or PMSS3904,135 equivalent, key selection considerations include its 60 V V_CBO, 180 MHz f_T, 4 pF C_c, 110 ns t_on, and SC-70 thermal resistance of 625 K/W - all critical for compact, high-speed, low-voltage biasing and switching designs.

Technical Context

This discrete NPN transistor operates as a voltage-controlled current switch with base-emitter forward bias enabling collector current conduction. Its h_FE varies from 40 at 0.1 mA to 30 at 100 mA, supporting both small-signal amplification and digital on/off control.

Switching performance is defined by t_on = 110 ns, t_off = 1200 ns, and storage time t_s = 1000 ns under standardized 3 V V_CC test conditions, indicating suitability for sub-microsecond digital logic interfacing and pulse generation where speed outweighs saturation depth.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - maximum safe collector-emitter voltage before breakdown in common-emitter configuration
I_C (DC)	100 mA - continuous collector current limit defining linear and switching load capacity
h_FE	100–300 @ I_C = 10 mA - usable DC current gain range for stable bias design in amplifier or switch driver stages
f_T	180 MHz - transition frequency indicating upper bandwidth limit for small-signal amplification
t_on	110 ns - turn-on delay enabling reliable operation in 5–10 MHz digital signal routing
R_{th j-a}	625 K/W - junction-to-ambient thermal resistance on FR4 PCB, requiring derating above 25 °C ambient
C_c	4 pF - collector-base capacitance limiting high-frequency feedthrough and affecting Miller effect in gain stages

Pinout & Package

SC-70 (SOT323) surface-mount plastic package: 1.35 mm × 1.15 mm footprint, 0.95 mm height, 3-terminal leadframe with gull-wing leads, optimized for automated placement and reflow soldering in space-constrained PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Current-controlled input node; requires ~0.7 V forward bias and sufficient I_B to drive specified I_C into saturation
2	Emitter	Common reference terminal; connected to ground or low-impedance return path in most switching configurations
3	Collector	Output current sink node; handles up to 100 mA DC load with V_CE(sat) ≤ 300 mV at I_C = 50 mA

Key Features

Feature	Design Value
Low-voltage switching	Rated for 40 V V_CEO and 60 V V_CBO, enabling use in 3.3 V/5 V logic-level interface circuits without external level shifting
High-speed response	110 ns t_on and 180 MHz f_T support clean edge transitions in clock distribution and data line buffering
Compact footprint	SOT323 package occupies <1.6 mm² board area, reducing layout overhead in multi-transistor bias networks
Thermal stability	Specified T_j up to 150 °C and T_stg from −65 °C to +150 °C, supporting industrial temperature-range deployments

Applications

Telephony Line Interface

USB Device Power Switching

Use Scenario: Signal conditioning and ring detection in analog telephone line cards.

IC Role / Device Role / Timing Role: NPN switch controlling relay drivers and AC-coupled signal paths during off-hook detection.

Use Value: Low V_BE(sat) (650–850 mV) ensures reliable turn-on with legacy 3 V bias rails; 4 pF C_c minimizes crosstalk between tip/ring lines.

Use Scenario: USB peripheral port power enable/disable in embedded host controllers.

IC Role / Device Role / Timing Role: Low-side load switch managing 5 V VBUS delivery to downstream devices.

Use Value: 100 mA I_C rating matches USB 2.0 enumeration current; 110 ns t_on enables fast port reset recovery.

IoT Sensor Bias Network

Audio Signal Amplifier Stage

Use Scenario: Providing stable DC bias to MEMS microphone preamplifiers in battery-powered nodes.

IC Role / Device Role / Timing Role: Constant-current source configured in common-emitter mode with emitter degeneration.

Use Value: h_FE = 100–300 at 1 mA supports predictable quiescent current setting; 200 mW P_tot allows operation at 2.8 V supply without thermal throttling.

Use Scenario: First-stage gain block in portable audio codec output drivers.

IC Role / Device Role / Timing Role: Small-signal amplifier with resistive collector load and capacitive coupling.

Use Value: 180 MHz f_T preserves audio band fidelity up to 20 kHz with margin; 12 pF C_e avoids instability in feedback configurations.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC847B,215	Same SOT23 package; h_FE = 200–450 @ I_C = 10 mA; V_CEO = 45 V; f_T = 100 MHz	Higher gain but lower f_T; larger footprint increases board area by ~30%	Preferred when higher DC gain stability is required over RF performance
MMBT3904LT1G	SOT-23 package; V_CEO = 40 V; I_C = 200 mA; R_{th j-a} = 357 K/W; t_on = 60 ns	Higher current rating and faster switching, but requires larger pad layout and different reflow profile	Chosen for higher-power switching where thermal margin and speed outweigh size constraints

Compared with BC847B,215 and MMBT3904LT1G, PMSS3904,135 delivers optimal balance of ultra-compact SC-70 footprint, 180 MHz bandwidth, and proven reliability in telephony and low-power IoT signal chains - making it preferred where board space and high-frequency response are jointly constrained.

Availability

PMSS3904,135 is available at Aetrix Electronics and suitable for telephony line interface, USB device power switching, and IoT sensor bias network applications requiring stable component supply across production lifecycles.

Supply support for PMSS3904,135 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 discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division, with engineering centers across Europe, Asia, and the Americas.

The PMSS3904,135 belongs to Nexperia's general-purpose bipolar transistor product line, designed specifically for cost-sensitive, space-constrained switching and amplification tasks in consumer, computing, and professional communication systems.

FAQ

Is PMSS3904,135 RoHS compliant and halogen-free?

Yes. PMSS3904,135 meets RoHS Directive 2011/65/EU and is certified halogen-free per IEC 61249-2-21. The device carries Nexperia's standard green marking and complies with JEDEC J-STD-020 moisture sensitivity level MSL3, verified in production lots since 2017.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current I_BM is 200 mA, but for continuous DC operation, Nexperia recommends limiting I_B to ≤10 mA to maintain junction temperature below 150 °C under typical FR4 board conditions and avoid long-term degradation of h_FE.

Can PMSS3904,135 replace BC847 in existing SOT23 designs?

No - PMSS3904,135 uses SC-70 (SOT323), not SOT23. Pinout differs (SOT323: 1=base, 2=emitter, 3=collector; SOT23: 1=emitter, 2=base, 3=collector), and footprint dimensions are incompatible. Direct replacement requires PCB redesign and layout verification.

Does this transistor support pulsed operation beyond 100 mA?

Yes - the datasheet specifies I_CM = 200 mA for peak collector current under pulse conditions (t_p ≤ 300 μs, duty cycle δ ≤ 0.02). Operation above 100 mA DC requires strict thermal management and must stay within the SOA boundary defined by V_CE × I_C ≤ P_tot derated for ambient temperature.

PMSS3904,135 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:: NPN

Current - Collector (Ic) (Max):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 40 V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 5mA, 50mA

Current - Collector Cutoff (Max):: 50nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 10mA, 1V

Power - Max:: 200 mW

Frequency - Transition:: 180MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-323

PMSS3904,135 FAQ

1.How can I place an order for PMSS3904,135 through Aetrix?

Please submit a Request for Quotation (RFQ) for PMSS3904,135 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 PMSS3904,135 reliable?

The price and inventory of PMSS3904,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PMSS3904,135 is usually 5 days.

3.What payment methods are accepted for PMSS3904,135?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PMSS3904,135 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PMSS3904,135?

PMSS3904,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PMSS3904,135 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 PMSS3904,135?

For technical support, including PMSS3904,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PMSS3904,135 requirements.

6.How does Aetrix verify that PMSS3904,135 is sourced from the original manufacturer or authorized distributors?

All PMSS3904,135 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 PMSS3904,135 meets industry standards.

7.What is the process for return or replacement of PMSS3904,135?

All PMSS3904,135 units undergo pre-shipment inspection (PSI). If there is an issue with PMSS3904,135, 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 PMSS3904,135 part is unused and in its original packaging.

Return procedure for PMSS3904,135:

1.Submit a request within 90 days.

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

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