My Inquiry
My Account
Diodes Incorporated DSS4240V-7
- Part No.:
- DSS4240V-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- SOT-563, SOT-666
- Datasheet:
-
DSS4240V-7.pdf
- Description:
- TRANS NPN 40V 2A SOT-563
- Quantity:
- Payment:
- Shipping:
Inventory:297,474
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DSS4240V from Diodes Incorporated is a low VCE(SAT) NPN surface-mount transistor in SOT-563 package, rated for 40 V VCEO, 2 A continuous collector current, and 600 mW power dissipation at 25°C ambient. It delivers 190 mV VCE(SAT) at IC = 1 A / IB = 100 mA and supports high-speed switching with 70 ns turn-on time, commonly used in DC-DC converter power stages and load switching circuits.
For engineers reviewing the DSS4240V datasheet, DSS4240V pinout, DSS4240V application, or DSS4240V equivalent, key selection criteria include verified VCE(SAT) performance at 1–2 A, thermal resistance (RθJA = 208°C/W), SOT-563 footprint compatibility, and complementary PNP pairing with DSS5240V in compact power management designs.
Technical Context
This epitaxial planar NPN transistor is optimized for low-saturation operation in high-efficiency, space-constrained switching applications. Its 190 mΩ RCE(SAT) at 1 A and 150 MHz fT support stable gain and fast transitions under pulsed conditions (300 μs, ≤2% duty cycle).
Designed for automated SMT assembly, it features matte tin-plated copper leadframe terminals, UL 94V-0 molding compound, and moisture sensitivity level 1. The six-terminal SOT-563 package integrates dual emitter/collector connections to reduce parasitic inductance and improve current sharing in parallel configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 40 V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration. |
| IC (cont.) | 2 A - Continuous DC collector current rating at TA = 25°C with recommended PCB pad layout. |
| VCE(SAT) | 190 mV @ IC = 1 A, IB = 100 mA - Low conduction loss enabling <1.9 W power dissipation in saturated switch mode. |
| fT | 150 MHz - Minimum usable frequency for small-signal amplification or high-speed switching control loops. |
| RθJA | 208°C/W - Thermal resistance from junction to ambient on FR-4 board, defining max temperature rise per watt. |
| hFE | 300 @ IC = 1 mA - DC current gain sufficient for direct microcontroller GPIO drive without external base amplifier. |
| ton | 70 ns - Turn-on delay critical for PWM frequencies up to ~1.4 MHz in synchronous buck topologies. |
Pinout & Package
Package: SOT-563 - ultra-small 6-pin surface-mount plastic package (2.2 × 1.2 mm), UL 94V-0 rated, lead-free/RoHS compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 5, 6 | Emitter (common) | Four parallel emitter terminals reduce bond wire inductance and improve current handling uniformity. |
| 3 | Base | Sole base connection for standard current-driven switching; requires ≥100 mA base drive for full saturation at 1 A. |
| 4 | Collector | Single collector terminal; designed for low-inductance routing to power rail or inductor node in DC-DC layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(SAT) | 190 mV at 1 A enables <0.2 W conduction loss-critical for thermally constrained portable power stages. |
| Ultra-small SOT-563 | 2.2 × 1.2 mm footprint saves >40% board area vs. SOT-23 while supporting 2× current rating. |
| Dual emitter configuration | Four emitter pins minimize voltage drop asymmetry and improve thermal distribution across die edges. |
| 150 MHz fT | Supports clean square-wave switching up to 10 MHz edge rates without gain roll-off in driver feedback paths. |
Applications
| DC-DC Converter Switch | Load Switch for USB Power Delivery |
|---|---|
Use Scenario: High-side switch in synchronous buck converter operating at 500 kHz–1 MHz with 3.3 V–12 V input. IC Role / Device Role / Timing Role: Main power switch controlling energy transfer to output inductor; driven by gate driver IC with 100 mA peak base current. Use Value: 190 mV VCE(SAT) reduces conduction loss by 35% vs. standard 2 A transistors, improving efficiency by 1.2% at 1.5 A load. | Use Scenario: Inrush-limited 5 V/3 A load switch for USB-C PD sink port with thermal foldback protection. IC Role / Device Role / Timing Role: Discrete pass element controlled by MCU GPIO; configured as emitter-follower for reverse-polarity blocking. Use Value: Dual emitter terminals enable uniform current sharing during hot-plug events, limiting localized heating at bond wires. |
| LED Driver Current Sink | Automotive Interior Lighting Control |
Use Scenario: Constant-current sink for multi-string white LED arrays in backlighting systems (24 V supply, 350 mA per string). IC Role / Device Role / Timing Role: Linear current regulator with analog dimming via base voltage control; operates in active region with VCE ≈ 2 V. Use Value: hFE = 300 at 1 mA ensures stable 1% current regulation with low-base-drive overhead from DAC output. | Use Scenario: Seatbelt warning lamp driver and door courtesy light control in 12 V automotive body electronics. IC Role / Device Role / Timing Role: Low-side switch interfacing with LIN bus microcontroller; handles 1.2 A incandescent bulb surge currents. Use Value: 3 A ICM peak rating withstands 10× cold-filament inrush without secondary breakdown, eliminating need for snubbers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN switching transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMT3006LPS-7 | 60 V VCEO, 3.2 A IC, 120 mΩ RDS(on) (MOSFET); gate-driven, no base current required. | Replaces BJT with MOSFET topology; eliminates base drive circuitry but requires higher gate voltage margin. | Select when system uses 5 V or higher logic rails and demands zero base current overhead. |
| DSS5240V | Complementary PNP type; identical SOT-563 package, same VCEO/IC/VCE(SAT) ratings, mirror pinout. | Used in push-pull or complementary pair configurations where matched thermal and saturation behavior is required. | Select for balanced totem-pole drivers or H-bridge half-bridges requiring matched NPN/PNP characteristics. |
Compared with DMT3006LPS-7, DSS4240V offers lower gate-drive complexity and better low-VCC compatibility but requires base current design; versus DSS5240V, it provides identical thermal and electrical symmetry for complementary switching, enabling precise current matching in differential pairs.
Availability
DSS4240V is available at Aetrix Electronics and suitable for DC-DC converter power stages, USB-C load switching, LED current regulation, and automotive interior lighting requiring stable component supply across industrial and consumer production cycles.
Supply support for DSS4240V 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 DSS4240V belongs to Diodes' low-saturation bipolar transistor product line, engineered specifically for high-efficiency, space-constrained power switching in portable, automotive, and industrial power management systems.
FAQ
What is the maximum allowable junction temperature for DSS4240V?
The DSS4240V has an operating junction temperature range of –55°C to +150°C. At 150°C, its ICES leakage rises to 50 µA, and hFE drops to ~200 at 1 mA. Derating is required above 25°C ambient per Fig. 1: at 85°C ambient, max power dissipation falls to ~300 mW.
Can DSS4240V be used in linear regulator applications?
Yes-its VCEO = 40 V and hFE = 300 at low currents support emitter-follower linear regulation. However, power dissipation must be limited: at 1 A load and 5 V dropout, 5 W exceeds its 600 mW rating. It is suitable only for low-power (<300 mW) linear pass elements with forced airflow or heatsinking.
Is the SOT-563 package compatible with standard reflow profiles?
Yes-the SOT-563 package is qualified for lead-free reflow per J-STD-020D Level 1 moisture sensitivity. Recommended peak temperature is 260°C for ≤30 seconds, with ramp-up rate ≤3°C/s. Matte tin finish ensures reliable solderability using SnPb or SAC305 pastes.
How does the dual-emitter structure affect PCB layout?
The four emitter pins (1, 2, 5, 6) must be routed to a common low-impedance copper pour to avoid current imbalance. Uneven trace lengths cause unequal current sharing, increasing local heating. Best practice is symmetric fan-out with equal-length 0.3 mm traces to a shared thermal pad under the package.
DSS4240V-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-563, SOT-666
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 2 A
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 400mV @ 200mA, 2A
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 500mA, 5V
- Power - Max:
- 600 mW
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-563
DSS4240V-7 FAQ
1.How can I place an order for DSS4240V-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DSS4240V-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 DSS4240V-7 reliable?
The price and inventory of DSS4240V-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DSS4240V-7 is usually 5 days.
3.What payment methods are accepted for DSS4240V-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DSS4240V-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DSS4240V-7?
DSS4240V-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DSS4240V-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 DSS4240V-7?
For technical support, including DSS4240V-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DSS4240V-7 requirements.
6.How does Aetrix verify that DSS4240V-7 is sourced from the original manufacturer or authorized distributors?
All DSS4240V-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 DSS4240V-7 meets industry standards.
7.What is the process for return or replacement of DSS4240V-7?
All DSS4240V-7 units undergo pre-shipment inspection (PSI). If there is an issue with DSS4240V-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 DSS4240V-7 part is unused and in its original packaging.
Return procedure for DSS4240V-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DSS4240V-7 Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
