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Diodes Incorporated DSS5240TQ-7
- Part No.:
- DSS5240TQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DSS5240TQ-7.pdf
- Description:
- TRANS PNP 40V 2A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:21,158
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Product details
Overview
DSS5240TQ from Diodes Incorporated is a 40V PNP bipolar junction transistor (BJT) engineered for automotive-grade load switching and gate driving, featuring -2A continuous collector current, -225mV max VCE(sat) at -1A, and 90mΩ equivalent on-resistance at -0.5A. It is AEC-Q101 qualified, manufactured in IATF 16949 certified facilities, and deployed in DC-DC converters and battery charging circuits.
For engineers reviewing the DSS5240TQ datasheet, DSS5240TQ pinout, DSS5240TQ application, or DSS5240TQ equivalent, key selection criteria include its low saturation voltage under high-current drive, thermal robustness up to +150°C, AEC-Q101 qualification status, and SOT23 package compatibility with space-constrained automotive power stages.
Technical Context
This PNP BJT operates as a high-current, low-saturation switch in automotive power control paths. Its BVCEO = -40V and IC = -2A rating support 12V/24V system-level load switching, while RCE(sat) = 90mΩ at -0.5A enables efficient conduction with minimal voltage drop and heat generation.
The device delivers hFE ≥ 210 at -1A and ≥ 100 at -2A, ensuring stable current amplification across its operating range. Its 4000V HBM ESD rating and -55°C to +150°C operating temperature range confirm suitability for harsh automotive environments without external protection circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -40V - Withstands full automotive battery transients in PNP high-side switch configurations |
| IC (continuous) | -2A - Supports sustained load currents typical of motor drivers and solenoid controls |
| VCE(sat) max | -225mV @ -1A/-50mA - Limits conduction loss to ≤225mW at rated current, reducing thermal stress |
| RCE(sat) | 90mΩ @ -0.5A/-50mA - Enables predictable on-state resistance modeling in PCB trace and layout planning |
| PD | 730mW - Sufficient for thermally managed SOT23 layouts using 15mm × 15mm 1oz copper pads |
| TJ range | -55°C to +150°C - Meets extended temperature requirements for engine bay and under-hood applications |
| AEC-Q101 | Qualified - Confirms reliability validation per automotive stress test standards including HTOL, TCT, and ESD |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated molding compound, and 0.008g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current source terminal for PNP operation | Connected to higher potential rail (e.g., battery+) in high-side switch topology |
| 2 (Base) | Control input for transistor turn-on/off | Receives negative base current to saturate; requires current-limiting resistor in driver stage |
| 3 (Collector) | Current sink terminal | Routes switched load current to ground or lower-potential node; soldered to thermal pad for heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Low saturation voltage | VCE(sat) ≤ -225mV at -1A ensures <225mW conduction loss, minimizing heatsink need in compact modules |
| High current capability | -2A continuous / -3A peak supports direct drive of MOSFET/IGBT gates and medium-power loads without buffering |
| Automotive qualification | AEC-Q101 qualification, PPAP capability, and IATF 16949 manufacturing ensure supply chain traceability and failure rate compliance |
| Green construction | Halogen- and antimony-free, RoHS 3 compliant, with <900ppm Br/Cl and <1000ppm Sb meets global automotive environmental mandates |
Applications
| Automotive Body Control Module (BCM) | 12V DC-DC Buck Converter High-Side Switch |
|---|---|
Use Scenario: Controlling door lock actuators, mirror heaters, and interior lighting via centralized microcontroller outputs. IC Role / Device Role / Timing Role: PNP high-side switch enabling positive-rail load activation with logic-level base drive. Use Value: -225mV VCE(sat) minimizes voltage drop across switch, preserving actuator torque and heater output at cold cranking voltages. |
Use Scenario: Synchronous rectification or pre-bias startup in automotive buck regulators powering infotainment systems. IC Role / Device Role / Timing Role: Low-loss PNP switch replacing Schottky diodes in non-synchronous topologies or assisting gate drive sequencing. Use Value: 90mΩ RCE(sat) reduces conduction loss by >40% vs. standard PNP alternatives, improving light-load efficiency. |
| Engine Control Unit (ECU) Fuel Injector Driver | On-Board Charger (OBC) Battery Pre-Charge Circuit |
Use Scenario: Driving low-impedance fuel injector coils requiring fast turn-off and high peak current handling. IC Role / Device Role / Timing Role: Saturated PNP switch providing controlled coil energization and flyback clamping path. Use Value: -3A ICM rating accommodates injector inrush spikes; 150°C TJ rating sustains operation near hot engine components. |
Use Scenario: Pre-charging high-voltage battery capacitors before main contactor closure to prevent arcing and inrush damage. IC Role / Device Role / Timing Role: Precision-controlled high-side current limiter during soft-start phase of OBC power-up sequence. Use Value: Tight VCE(sat) tolerance (-100mV to -225mV) enables accurate pre-charge current regulation without feedback compensation. |
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 |
|---|---|---|---|
| ZXTN25050DFH | Higher VCEO (-50V), lower IC (-1.5A), 115mΩ RCE(sat) at -0.5A; SOT23-3 package | Preferred where higher breakdown margin is needed but peak current is ≤1.5A; not AEC-Q101 qualified | Select when system transient immunity exceeds -40V but automotive qualification is not required |
| DMT3005LPSQ-7 | PNP MOSFET (not BJT); -30V VDS, -5A ID, 45mΩ RDS(on); same SOT23-3 footprint | Enables gate-driven switching with zero base current, but lacks linear gain and requires higher gate voltage swing | Choose for ultra-low on-resistance needs where driver IC can provide ≥4.5V gate drive and BJT gain is unnecessary |
Compared with ZXTN25050DFH and DMT3005LPSQ-7, DSS5240TQ uniquely balances AEC-Q101 compliance, -2A continuous current, and sub-225mV saturation voltage in a standard SOT23-making it optimal for cost-sensitive, thermally constrained automotive switches where BJT linearity and qualification are mandatory.
Availability
DSS5240TQ is available at Aetrix Electronics and suitable for automotive body control modules, DC-DC converter power stages, and battery management pre-charge circuits requiring stable component supply and long-term lifecycle assurance.
Supply support for DSS5240TQ 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, specializing in high-reliability components for automotive, industrial, and computing markets.
DSS5240TQ belongs to Diodes' Automotive-Grade Power Transistor product line, designed specifically for AEC-Q101-compliant high-current switching in engine control, chassis, and powertrain subsystems.
FAQ
Is DSS5240TQ suitable for high-frequency switching applications?
No-DSS5240TQ is optimized for DC and low-frequency switching (≤10kHz), with fT = 100MHz measured under small-signal conditions. Its design prioritizes low saturation voltage and high current handling over switching speed; use dedicated RF or high-speed switching transistors for >100kHz PWM applications.
What is the recommended base resistor value for driving DSS5240TQ at -2A collector current?
At -2A IC, hFE ≥ 100 requires ≥-20mA base current. With VBE(sat) = -1.1V and typical 3.3V or 5V logic driver, a 220Ω resistor (for 5V) or 180Ω (for 3.3V) ensures sufficient base drive while limiting power dissipation in the driver stage.
Does DSS5240TQ require a heatsink in standard SOT23 mounting?
No-when mounted on a 15mm × 15mm 1oz copper pad per Diodes' recommended layout, its 730mW PD and 171°C/W RθJA allow safe operation up to ~85°C ambient at full -2A load; additional copper area or airflow extends usable ambient range without mechanical heatsinking.
Can DSS5240TQ replace NPN transistors in existing designs?
No-it is a PNP device with opposite polarity and complementary biasing requirements. Replacing an NPN requires inverting the drive signal, reversing supply connections, and verifying voltage margins; direct substitution is not electrically feasible without schematic and layout revision.
DSS5240TQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- 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):
- 2 A
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 350mV @ 200mA, 2A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 210 @ 1A, 2V
- Power - Max:
- 730 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DSS5240TQ-7 FAQ
1.How can I place an order for DSS5240TQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DSS5240TQ-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 DSS5240TQ-7 reliable?
The price and inventory of DSS5240TQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DSS5240TQ-7 is usually 5 days.
3.What payment methods are accepted for DSS5240TQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DSS5240TQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DSS5240TQ-7?
DSS5240TQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DSS5240TQ-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 DSS5240TQ-7?
For technical support, including DSS5240TQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DSS5240TQ-7 requirements.
6.How does Aetrix verify that DSS5240TQ-7 is sourced from the original manufacturer or authorized distributors?
All DSS5240TQ-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 DSS5240TQ-7 meets industry standards.
7.What is the process for return or replacement of DSS5240TQ-7?
All DSS5240TQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DSS5240TQ-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 DSS5240TQ-7 part is unused and in its original packaging.
Return procedure for DSS5240TQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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