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Diodes Incorporated DSS5240T-7
- Part No.:
- DSS5240T-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DSS5240T-7.pdf
- Description:
- TRANS PNP 40V 2A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:103,035
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Product details
Overview
DSS5240T-7 from Diodes Incorporated is a 40V PNP low-saturation transistor in SOT23 package, designed for high-current switching in gate drive and load switch applications. It delivers -2A continuous collector current, -225mV max VCE(sat) at -1A, and 90mΩ RCE(sat) at -0.5A, enabling efficient power control in DC-DC converters and battery charging circuits.
For engineers reviewing the DSS5240T-7 datasheet, DSS5240T-7 pinout, DSS5240T-7 application, or DSS5240T-7 equivalent, key selection criteria include its -40V VCEO, thermal resistance of 171°C/W (RθJA), ESD HBM rating of 4kV, complementary NPN pairing with DSS4240T, and automotive-grade variant DSS5240TQ.
Technical Context
This PNP bipolar junction transistor operates with emitter-grounded configuration and supports high pulse currents up to -3A. Its low saturation voltage and on-resistance are achieved through optimized doping and geometry, enabling minimal conduction loss in high-duty-cycle switching.
The device features a 730mW power dissipation rating under standard PCB mounting (15mm × 15mm 1oz copper), with thermal resistance from junction to ambient (RθJA) specified at 171°C/W - critical for thermal design in compact power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -40V - Ensures safe operation in 24V and 36V industrial bus systems with margin against transients. |
| IC (continuous) | -2A - Supports robust load switching without derating in ambient temperatures ≤85°C with proper layout. |
| VCE(sat) max | -225mV @ -1A, -50mA - Limits conduction loss to <225mW per switch event at rated current. |
| RCE(sat) | 90mΩ @ -0.5A - Enables predictable I²R loss modeling for thermal simulation in DC-DC synchronous rectifier paths. |
| fT | 100MHz - Sufficient for gate driving MOSFETs/IGBTs up to ~500kHz PWM frequencies with stable gain. |
| ESD HBM | 4,000V - Provides handling robustness during board assembly and bench-level prototyping. |
| PD | 730mW - Defines maximum steady-state power under JEDEC-standard PCB thermal conditions. |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with matte tin-plated leads, UL 94V-0 rated, moisture sensitivity level 1, weight ≈0.008g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected to system ground or low-side return path; carries full load current in common-emitter configuration. |
| 2 (Base) | Control input | Receives negative bias current to turn on; requires -50mA for full saturation at -1A collector current. |
| 3 (Collector) | Power output terminal | Connected to load or switched rail; voltage swing limited to -40V relative to emitter. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | -225mV max at -1A ensures <0.23W conduction loss, reducing thermal stress in space-constrained designs. |
| High IC rating | -2A continuous current supports direct driving of medium-power MOSFET gates or resistive loads without external buffering. |
| Complementary pairing | Matched performance with DSS4240T (NPN) enables balanced push-pull output stages in H-bridge or half-bridge drivers. |
| Green packaging | Halogen- and antimony-free, RoHS-compliant molding compound meets automotive and industrial environmental compliance requirements. |
Applications
| Gate Driving | Load Switching |
|---|---|
Use Scenario: Driving the gate of a 60V N-channel MOSFET in a high-side buck converter. IC Role / Device Role / Timing Role: PNP switch providing fast, low-loss turn-on current surge to charge the MOSFET gate capacitance. Use Value: -225mV VCE(sat) minimizes voltage drop across the driver, preserving gate drive voltage headroom and ensuring reliable MOSFET enhancement. | Use Scenario: Enabling/disabling a 12V, 1.5A solenoid in an industrial control module. IC Role / Device Role / Timing Role: High-current PNP load switch controlling power delivery to the solenoid coil. Use Value: -2A continuous rating and 730mW power dissipation allow sustained activation without thermal shutdown under nominal operating conditions. |
| DC-DC Conversion | Battery Charging |
Use Scenario: Synchronous rectification in a 5V-to-3.3V buck converter with 2A output. IC Role / Device Role / Timing Role: Low-RCE(sat) PNP switch replacing Schottky diode in secondary-side rectification path. Use Value: 90mΩ RCE(sat) reduces conduction loss by >40% vs. typical 0.4V Schottky, improving efficiency at light-to-moderate loads. | Use Scenario: Controlling charging current to a 3S Li-ion pack (12.6V max) from a 15V supply. IC Role / Device Role / Timing Role: Precision current-limiting switch in linear charger path with external sense resistor feedback. Use Value: Tight VCE(sat) tolerance (-100mV to -225mV) enables accurate current regulation within ±5% over temperature and process variation. |
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 |
|---|---|---|---|
| ZXTP5240F | Same VCEO (-40V), lower VCE(sat) (-180mV max @ -1A), higher fT (150MHz), same SOT23 package. | Improved switching speed and reduced conduction loss; recommended for new designs per Diodes' notice. | Select when upgrading legacy designs or requiring tighter thermal budget and faster gate drive capability. |
| MMBT5401 | Lower IC (-0.6A), higher VCE(sat) (-400mV @ -0.1A), no RCE(sat) spec, older process node. | Suitable only for signal-level or low-current switching; not viable for >0.5A load applications. | Retain only for cost-sensitive, low-power signal inversion where DSS5240T-7's performance headroom is unnecessary. |
Compared with DSS5240T-7, ZXTP5240F offers superior saturation voltage and bandwidth for next-generation power stages, while MMBT5401 serves only as a functional but electrically de-rated fallback for non-critical signal tasks - neither is a drop-in replacement without circuit revalidation.
Availability
DSS5240T-7 is available at Aetrix Electronics and suitable for gate driving MOSFETs and IGBTs, load switching in industrial controls, and DC-DC converter power stages requiring stable component supply and long-term obsolescence management.
Supply support for DSS5240T-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, manufacturing, and sales operations across Asia, Europe, and the Americas.
The DSS5240T belongs to Diodes' high-performance bipolar transistor product line, engineered specifically for power switching applications demanding low saturation voltage, high current capability, and robust thermal performance in compact SOT23 packages.
FAQ
Is DSS5240T-7 suitable for automotive applications?
No - DSS5240T-7 is not AEC-Q101 qualified. Diodes offers the automotive-compliant DSS5240TQ variant, which undergoes extended temperature cycling, HTOL, and ESD testing per AEC standards. Use DSS5240TQ for under-hood or safety-critical vehicle systems.
What is the maximum allowable base current for reliable operation?
The absolute maximum base current is -300mA, but for sustained operation at -2A collector current, Diodes specifies -200mA base drive. Exceeding -200mA risks localized heating at the base-emitter junction and accelerated degradation; design must ensure IB ≤ -200mA under worst-case VBE(sat) and thermal conditions.
Can DSS5240T-7 be used in parallel for higher current handling?
Not recommended - bipolar transistors exhibit negative temperature coefficient of VBE, causing current hogging when paralleled without individual emitter resistors. The datasheet provides no derating guidance or matching data for parallel operation; use a single higher-rated device or MOSFET-based solution instead.
Does the SOT23 package support hand-soldering with hot air?
Yes - the SOT23 package is compatible with hot-air rework at peak temperatures ≤350°C for ≤10 seconds, provided preheat reaches 150°C and ramp rates comply with J-STD-020. Diodes specifies moisture sensitivity level 1, so baking is unnecessary unless exposed to >60% RH for >72 hours.
DSS5240T-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:
- 600 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DSS5240T-7 FAQ
1.How can I place an order for DSS5240T-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DSS5240T-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 DSS5240T-7 reliable?
The price and inventory of DSS5240T-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DSS5240T-7 is usually 5 days.
3.What payment methods are accepted for DSS5240T-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DSS5240T-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DSS5240T-7?
DSS5240T-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DSS5240T-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 DSS5240T-7?
For technical support, including DSS5240T-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DSS5240T-7 requirements.
6.How does Aetrix verify that DSS5240T-7 is sourced from the original manufacturer or authorized distributors?
All DSS5240T-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 DSS5240T-7 meets industry standards.
7.What is the process for return or replacement of DSS5240T-7?
All DSS5240T-7 units undergo pre-shipment inspection (PSI). If there is an issue with DSS5240T-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 DSS5240T-7 part is unused and in its original packaging.
Return procedure for DSS5240T-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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