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Nexperia USA Inc. PBSS4140T,235
- Part No.:
- PBSS4140T,235
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PBSS4140T,235.pdf
- Description:
- TRANS NPN 40V 1A TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,540
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Product details
Overview
PBSS4140T,235 from Nexperia is a 40 V, 1 A NPN low VCEsat transistor in SOT23 package, designed for high-efficiency switching in battery-powered systems. It delivers RCEsat = 260 mΩ (typ) at IC = 500 mA / IB = 50 mA, VCEsat ≤ 500 mV at 1 A drive, and operates across −65 °C to 150 °C ambient. Used in LCD backlighting and supply-line switching for mobile phones and handheld devices.
For engineers reviewing the PBSS4140T,235 datasheet, PBSS4140T,235 pinout, PBSS4140T,235 application, or PBSS4140T,235 equivalent, key selection criteria include verified low saturation resistance, thermal performance on FR4 PCBs, SOT23 footprint compatibility, and PNP complement availability (PBSS5140T).
Technical Context
This NPN transistor operates as a saturated switch with fixed base-driven control logic, optimized for DC/low-frequency switching rather than linear amplification. Its low VCEsat and RCEsat reduce conduction losses, while fT = 150 MHz supports fast turn-on/turn-off transitions under pulsed conditions.
The device adheres to IEC 60134 absolute maximum ratings, with VCEO = 40 V, IC = 1 A continuous, and Ptot = 450 mW on optimized PCB layout. Thermal resistance Rth(j-a) is 278 K/W with 1 cm² collector pad, enabling stable operation in compact battery-driven enclosures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 40 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in supply switching. |
| IC | 1 A - Continuous collector current rating; supports sustained load switching in portable power rails. |
| VCEsat | ≤ 500 mV at IC = 1 A, IB = 100 mA - Ensures <100 mW conduction loss per switch, critical for thermal budget in sealed devices. |
| RCEsat | 260–500 mΩ (typ–max) at IC = 500 mA - Enables precise on-resistance modeling for efficiency simulation in battery discharge paths. |
| hFE | 200 min at IC = 1 A - Confirms sufficient DC gain for direct GPIO-level base drive without external amplification. |
| fT | 150 MHz - Supports sub-100 ns switching edges, suitable for PWM dimming up to ~100 kHz in backlight circuits. |
| Tj max | 150 °C - Junction temperature limit allowing operation in thermally constrained handheld enclosures. |
Pinout & Package
SOT23 plastic surface-mount package: 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body. Standard footprint compatible with reflow and wave soldering per Nexperia's sot023_fr and sot023_fw guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control input node; requires ≥100 mA peak drive for full saturation at 1 A collector current. |
| 2 | Emitter | Reference terminal for bias network; connected to system ground or low-side return path in switching topologies. |
| 3 | Collector | High-current output node; electrically and thermally coupled to PCB copper area for heat dissipation (1 cm² pad recommended). |
Key Features
| Feature | Design Value |
|---|---|
| Low VCEsat | ≤500 mV at 1 A enables <100 mW conduction loss, reducing thermal stress in space-constrained battery packs. |
| High current capability | 1 A continuous rating supports direct driving of LED strings or power rails without external current boosting. |
| Thermal reliability | Rth(j-a) = 278 K/W with optimized pad ensures junction stays <125 °C at 400 mW dissipation in handheld use. |
| Robust breakdown margins | VCEO = VCBO = 40 V provides 20% headroom above typical 3.3 V/5 V/12 V supply rails. |
| Wide temperature range | −65 °C to +150 °C operation supports deployment in automotive cabin modules and industrial edge sensors. |
Applications
| Mobile Phone Power Switching | LCD Backlight Control |
|---|---|
Use Scenario: Enabling/disabling main PMIC output rails during sleep/wake transitions in smartphones. IC Role / Device Role / Timing Role: Low-side saturated switch controlling 3.3 V or 5 V system power domains. Use Value: Sub-500 mV VCEsat minimizes voltage droop and self-heating during frequent on/off cycling. |
Use Scenario: PWM-controlled current sink for white LED strings in smartphone and tablet displays. IC Role / Device Role / Timing Role: Constant-current switch modulating LED brightness at 1–10 kHz. Use Value: 150 MHz fT ensures clean PWM edges and minimal duty-cycle distortion at 10 kHz. |
| Battery Protection Circuitry | Handheld Camera Supply Line Switch |
Use Scenario: Isolating backup battery from main system during overvoltage or fault conditions. IC Role / Device Role / Timing Role: Reverse-polarity and overvoltage protection switch in series with Li-ion cell. Use Value: 40 V VCEO accommodates 2S Li-ion (8.4 V) with margin for transient spikes. |
Use Scenario: Hot-swap enable for camera sensor and image processor subsystems. IC Role / Device Role / Timing Role: Soft-start and inrush-limited power switch for 1.8 V/2.8 V analog/digital rails. Use Value: 1 A rating and 260 mΩ RCEsat support controlled ramp-up without brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN low-VCEsat switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMN2004LK-7 | VCEO = 20 V, RDS(on) = 35 mΩ (MOSFET), gate-driven; no base current required. | Better for ultra-low-loss 3.3 V rail switching; unsuitable above 20 V due to lower breakdown. | Select when gate drive is available and VDS ≤ 20 V; avoid for 5 V+ or 40 V tolerant designs. |
| PBSS4041T,215 | VCEO = 40 V, IC = 1 A, but VCEsat = 600 mV (max) and RCEsat = 350 mΩ (typ) - higher conduction loss. | Same footprint and function, but less efficient at high current; used where cost prioritized over thermal margin. | Acceptable for low-duty-cycle or intermittent loads; not recommended for continuous 1 A backlighting. |
Compared with DMN2004LK-7 and PBSS4041T,215, PBSS4140T,235 offers optimal balance of 40 V tolerance, 500 mV VCEsat ceiling, and SOT23 compatibility-making it preferred for battery-powered 5–12 V switching where bipolar drive simplicity and voltage margin are essential.
Availability
PBSS4140T,235 is available at Aetrix Electronics and suitable for mobile phone power switching, LCD backlight control, battery protection circuitry, and handheld camera supply line switching requiring stable component supply and long-term production continuity.
Supply support for PBSS4140T,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 standard logic, discrete, and MOSFET solutions for consumer, industrial, and automotive markets.
PBSS4140T,235 belongs to Nexperia's "Low VCEsat Transistor" product line, engineered specifically for energy-efficient switching in portable and battery-operated electronics where thermal density and voltage margin are critical.
FAQ
What is the maximum continuous collector current for PBSS4140T,235?
The maximum continuous collector current is 1 A, specified at Tamb ≤ 25 °C with proper PCB thermal management (1 cm² collector pad). Derating applies above 25 °C ambient per the thermal resistance curve in the datasheet, reaching ~0.7 A at 85 °C ambient.
Can PBSS4140T,235 replace a standard general-purpose NPN transistor like BC817?
No-it is not a drop-in replacement. PBSS4140T,235 has significantly lower VCEsat (≤500 mV vs. ~700–900 mV) and higher current gain (hFE ≥200 at 1 A), but requires higher base drive (100 mA) for full saturation. Base resistor values must be recalculated to ensure adequate IB/IC ratio.
Is PBSS4140T,235 qualified for automotive applications?
No. The datasheet explicitly states this is a non-automotive qualified product. It lacks AEC-Q101 qualification, automotive-grade testing, and guaranteed operation over the full −40 °C to +125 °C automotive temperature range. Use only in commercial or industrial portable equipment.
What is the recommended PCB layout for thermal performance?
For rated 450 mW power dissipation, Nexperia specifies a 1 cm² copper pad connected to the collector (Pin 3) on a single-sided FR4 board with 35 µm tin-plated copper. Solder mask opening over the pad and thermal vias to inner layers further improve Rth(j-a), but are not required for basic compliance.
PBSS4140T,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:
- NPN
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 100mA, 1A
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 500mA, 5V
- Power - Max:
- 450 mW
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
PBSS4140T,235 FAQ
1.How can I place an order for PBSS4140T,235 through Aetrix?
Please submit a Request for Quotation (RFQ) for PBSS4140T,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 PBSS4140T,235 reliable?
The price and inventory of PBSS4140T,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS4140T,235 is usually 5 days.
3.What payment methods are accepted for PBSS4140T,235?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS4140T,235 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PBSS4140T,235?
PBSS4140T,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PBSS4140T,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 PBSS4140T,235?
For technical support, including PBSS4140T,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS4140T,235 requirements.
6.How does Aetrix verify that PBSS4140T,235 is sourced from the original manufacturer or authorized distributors?
All PBSS4140T,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 PBSS4140T,235 meets industry standards.
7.What is the process for return or replacement of PBSS4140T,235?
All PBSS4140T,235 units undergo pre-shipment inspection (PSI). If there is an issue with PBSS4140T,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 PBSS4140T,235 part is unused and in its original packaging.
Return procedure for PBSS4140T,235:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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