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Diodes Incorporated DSS5140U-7
- Part No.:
- DSS5140U-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
DSS5140U-7.pdf
- Description:
- TRANS PNP 40V 1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:2,800
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Product details
Overview
DSS5140U-7 from Diodes Incorporated is a 40V PNP low-saturation bipolar junction transistor in SOT323 package, rated for -1A continuous collector current, -500mV VCE(sat) at -1A, and qualified to AEC-Q101 for automotive reliability. It serves as a high-efficiency switching or linear amplification device in space-constrained power management circuits.
For engineers reviewing the DSS5140U-7 datasheet, DSS5140U-7 pinout, DSS5140U-7 application, or DSS5140U-7 equivalent, key selection criteria include its -40V VCEO, ultra-low saturation voltage, thermal resistance of 313°C/W (RθJA), and compatibility with lead-free reflow profiles per J-STD-020 Level 1.
Technical Context
This PNP transistor operates with emitter-grounded configuration and supports DC and pulsed switching up to -2A peak current. Its hFE ranges from 800 at -1mA to 160 at -1A, enabling stable gain across load conditions.
Designed for high-reliability automotive applications, it features -55°C to +150°C operating temperature range, 4kV HBM ESD rating, and halogen/antimony-free "Green" molding compound compliant with UL 94V-0 flammability standard.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -40V - Maximum safe collector-emitter voltage under open-base condition |
| IC (cont.) | -1A - Continuous current handling capability without derating at TA = 25°C |
| VCE(sat) | < -500mV @ IC = -1A, IB = -100mA - Enables low conduction loss in high-current switching |
| PD | 400mW - Power dissipation limit on standard 1oz copper PCB per JEDEC test condition |
| RθJA | 313°C/W - Thermal resistance defining junction-to-ambient temperature rise per watt |
| fT | 150MHz - Current gain-bandwidth product supporting medium-speed switching |
| ESD HBM | 4,000V - Robustness against human-body electrostatic discharge events |
Pinout & Package
SOT323 is a 3-pin ultra-small surface-mount plastic package with matte tin-plated leads, 0.006g mass, and moisture sensitivity level 1. Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector (top view, ZP6 marking).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Emitter) | Current source terminal for PNP operation | Connected to higher potential node; defines reference for base drive polarity |
| Pin 2 (Base) | Control input for minority-carrier injection | Requires negative bias relative to emitter to turn on; drives -100mA max for full saturation |
| Pin 3 (Collector) | Current sink terminal | Connected to load return path; handles -1A continuous with < -500mV drop |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | < -500mV at -1A enables >95% efficiency in 12V load-switching applications |
| AEC-Q101 qualification | Validated for automotive under-hood use including engine control and lighting modules |
| SOT323 footprint | 2.1mm × 1.3mm outline allows placement in dense PCB layouts with minimal thermal pad area |
| Halogen/antimony-free | Meets <900ppm Br/Cl and <1000ppm Sb requirements for eco-compliant industrial designs |
Applications
| Automotive LED Headlamp Driver | Industrial PLC Output Stage |
|---|---|
Use Scenario: Switching 12V LED arrays in adaptive front-lighting systems with PWM dimming. IC Role / Device Role / Timing Role: PNP high-side switch controlling current flow to LED string via emitter-follower configuration. Use Value: -500mV VCE(sat) minimizes heat generation at 1A drive, reducing need for heatsinking in sealed headlamp housings. | Use Scenario: Driving 24V solenoid valves in factory automation I/O modules. IC Role / Device Role / Timing Role: Discrete output stage providing robust current sinking with fast turn-off (250ns) for precise valve timing. Use Value: 150MHz fT and 220ns storage time ensure clean switching edges at 1kHz control frequencies. |
| DC-DC Converter Bias Supply | USB-C Power Delivery Load Switch |
Use Scenario: Regulating auxiliary bias voltage for gate drivers in buck converter controllers. IC Role / Device Role / Timing Role: Linear pass element in low-noise LDO-like configuration with fixed base bias. Use Value: Stable hFE down to -55°C ensures consistent regulation across automotive temperature extremes. | Use Scenario: Enabling/disabling 5V/3A USB-C power paths with reverse-voltage protection. IC Role / Device Role / Timing Role: PNP-based high-side load switch with integrated base resistor network (external). Use Value: -40V VCEO provides margin against bus transients; AEC-Q101 rating supports automotive USB-C docking stations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP low-saturation transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMT3005LPS-7 | 30V VCEO, -1.5A IC, SOT23 package, RθJA = 290°C/W | Limited to ≤30V systems; higher current but lower voltage margin | Select when board space permits larger SOT23 and system voltage stays below 30V |
| BC807-40W | 45V VCEO, -500mA IC, SOT323, hFE = 250–630 | Lower current rating; suitable only for sub-500mA loads | Choose for cost-sensitive non-automotive applications where -1A is not required |
Compared with DMT3005LPS-7 and BC807-40W, the DSS5140U-7 uniquely balances -40V rating, -1A capability, and AEC-Q101 qualification in the smallest SOT323 footprint-making it optimal for automotive-grade 12V/24V switching where voltage margin and reliability are critical.
Availability
DSS5140U-7 is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC outputs, DC-DC bias supplies, and USB-C load switching requiring stable component supply and AEC-Q101 compliance.
Supply support for DSS5140U-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the US.
The DSS5140U belongs to Diodes' AEC-Q101-qualified discrete transistor family, engineered specifically for automotive power switching and industrial control applications demanding high reliability and low saturation loss.
FAQ
What is the maximum allowable base current for DSS5140U-7?
The absolute maximum peak base current is -1A per the datasheet's Absolute Maximum Ratings table. For reliable continuous operation, the recommended maximum base current is -100mA, which ensures full saturation at -1A collector current while maintaining thermal safety within the 400mW power limit.
Can DSS5140U-7 be used in linear regulator applications?
Yes - its low VCE(sat) and stable hFE over temperature make it suitable for low-dropout linear pass elements. When biased appropriately (e.g., fixed base current or emitter-degenerated configuration), it delivers predictable regulation with minimal dropout voltage, especially in 12V auxiliary supplies where efficiency and thermal budget are constrained.
Is the SOT323 package of DSS5140U-7 compatible with standard reflow profiles?
Yes - the device uses matte tin-plated leads and is qualified for lead-free reflow per J-STD-020 Level 1 moisture sensitivity. It withstands peak temperatures up to 260°C and is compatible with standard Pb-free soldering profiles, including ramp-to-spike and soak profiles used in high-volume SMT assembly.
How does DSS5140U-7 compare to its complementary NPN type DSS4140U?
DSS4140U is the matched NPN counterpart with identical voltage/current ratings (+40V VCEO, +1A IC) and SOT323 packaging. Both share the same thermal performance, AEC-Q101 qualification, and Green material composition, enabling balanced push-pull or H-bridge designs where complementary switching behavior and matched characteristics are essential.
DSS5140U-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- 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 @ 100mA, 5V
- Power - Max:
- 400 mW
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
DSS5140U-7 FAQ
1.How can I place an order for DSS5140U-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DSS5140U-7 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 DSS5140U-7 reliable?
The price and inventory of DSS5140U-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DSS5140U-7 is usually 5 days.
3.What payment methods are accepted for DSS5140U-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DSS5140U-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DSS5140U-7?
DSS5140U-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DSS5140U-7 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 DSS5140U-7?
For technical support, including DSS5140U-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DSS5140U-7 requirements.
6.How does Aetrix verify that DSS5140U-7 is sourced from the original manufacturer or authorized distributors?
All DSS5140U-7 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 DSS5140U-7 meets industry standards.
7.What is the process for return or replacement of DSS5140U-7?
All DSS5140U-7 units undergo pre-shipment inspection (PSI). If there is an issue with DSS5140U-7, 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 DSS5140U-7 part is unused and in its original packaging.
Return procedure for DSS5140U-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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