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Diodes Incorporated DSS3515MQ-7
- Part No.:
- DSS3515MQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- 3-UFDFN
- Datasheet:
-
DSS3515MQ-7.pdf
- Description:
- TRANS PNP 15V 0.5A X1-DFN1006-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,840
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Product details
Overview
DSS3515MQ from Diodes Incorporated is a 15V PNP bipolar junction transistor (BJT) optimized for automotive power switching applications, featuring VCEO = −15V, IC = −500mA continuous, VCE(SAT) ≤ −250mV at −500mA/−50mA, AEC-Q101 qualification, and X1-DFN1006-3 package with exposed collector pad for thermal performance.
For engineers reviewing the DSS3515MQ datasheet, DSS3515MQ pinout, DSS3515MQ application, or DSS3515MQ equivalent, key selection criteria include low saturation voltage under high-current switching, compact 0.6mm² footprint, automotive-grade reliability, and complementary pairing with DSS2515M NPN for push-pull or H-bridge configurations.
Technical Context
This PNP BJT operates as a high-efficiency, low-VCE(SAT) switch in automotive load control circuits, supporting pulsed currents up to −1A with guaranteed hFE ≥ 90 at −500mA. Its design targets space-constrained modules where thermal resistance to ambient (RθJA = 310°C/W on minimal PCB, 120°C/W with 25mm × 25mm 2oz copper) must be managed via the exposed collector pad.
The device delivers stable DC current gain across temperature (hFE = 200 at −10mA, 90 at −500mA), exhibits fT = 100–340MHz for moderate-frequency switching, and maintains ESD robustness (HBM 4kV, MM 200V) while meeting stringent automotive qualification per AEC-Q101.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −15V - Maximum allowable collector-emitter voltage before breakdown in common-emitter configuration. |
| IC (continuous) | −500mA - Sustained collector current capability without thermal derating on standard PCB layout. |
| VCE(SAT) | ≤ −250mV @ −500mA/−50mA - Enables <0.125W conduction loss in high-side switch applications. |
| hFE | 90 min @ −500mA - Ensures sufficient base drive margin for reliable saturation in automotive solenoid drivers. |
| RθJA | 310°C/W (min pad) - Defines thermal rise per watt on single-sided FR-4; drops to 120°C/W with enhanced copper area. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive underhood environments (−55°C to +150°C). |
| Package | X1-DFN1006-3 - 0.6mm² footprint, 0.5mm height, exposed collector pad for direct thermal path. |
Pinout & Package
Package: X1-DFN1006-3 - ultra-compact 3-terminal surface-mount package with exposed collector pad (pin 1 = emitter, pin 2 = base, pin 3 = collector). Dimensions: 1.0mm × 0.6mm × 0.5mm; weight ≈ 0.0009g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Emitter) | Current sink terminal | Connected to load return path; polarity defines PNP operation with emitter at highest potential in circuit. |
| Pin 2 (Base) | Control input | Receives negative base current to turn on; requires current-limiting resistor for safe drive from MCU GPIO or driver IC. |
| Pin 3 (Collector) | Power output terminal | Exposed metal pad serves as primary thermal path and high-current output node; must be soldered to large copper pour. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(SAT) | ≤ −250mV at −500mA enables <125mW conduction loss, reducing thermal stress in 12V automotive loads. |
| Ultra-small footprint | 0.6mm² area - 13× smaller than SOT-23, enabling dense PCB layouts in space-limited ECUs and body controllers. |
| AEC-Q101 qualification | Validated for automotive underhood use including temperature cycling, humidity bias, and mechanical shock testing. |
| Exposed collector pad | Direct thermal interface reduces RθJL to 120°C/W, allowing higher sustained power in thermally constrained designs. |
| Complementary NPN pair | DSS2515M shares identical package and electrical specs (except polarity), simplifying dual-rail driver design. |
Applications
| Automotive Door Lock Actuator | LED Headlamp Dimming Control |
|---|---|
Use Scenario: Driving 12V solenoid-based door lock mechanisms requiring bidirectional current control and fast turn-off. IC Role / Device Role / Timing Role: High-side PNP switch providing controlled current sink to ground-referenced solenoid coil. Use Value: Low VCE(SAT) minimizes self-heating during repeated actuation cycles; AEC-Q101 ensures longevity in vehicle lifetime testing. | Use Scenario: PWM-controlled dimming of high-brightness LED strings in adaptive headlamps with tight thermal envelopes. IC Role / Device Role / Timing Role: Fast-switching PNP current sink enabling precise duty-cycle control at 1–10kHz PWM frequencies. Use Value: fT > 100MHz supports clean switching edges; compact DFN package fits near optics without compromising thermal management. |
| Engine Control Unit (ECU) Fuel Injector Driver | Body Control Module (BCM) Window Lift Motor Control |
Use Scenario: Driving low-impedance fuel injector coils (≈2Ω) with precise pulse-width modulation and fast decay. IC Role / Device Role / Timing Role: Saturated PNP switch delivering −500mA peak current with sub-1µs turn-on/turn-off times. Use Value: Guaranteed hFE ≥ 90 at full load ensures stable base drive margin; RθJL = 120°C/W supports burst-mode operation without thermal shutdown. | Use Scenario: Controlling reversible DC motors in power window systems using half-H-bridge topology with complementary BJTs. IC Role / Device Role / Timing Role: One leg of push-pull pair (with DSS2515M) managing motor direction and braking current paths. Use Value: Matched package and electrical specs with DSS2515M simplify layout symmetry and thermal balancing in dual-switch configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DSS3515Q-7 | Same die, different reel packaging (7″ vs. 13″); identical electrical and thermal specs. | No functional difference; selected based on production line tape width (8mm) and reel size requirements. | Choose when standard 7″ reel logistics align with SMT placement equipment constraints. |
| ZXTN25050DFHTA | Higher VCEO (−50V), lower hFE (min 100 @ −500mA), larger SOT-23 package (3.0mm² vs. 0.6mm²). | Suitable for non-automotive industrial loads requiring higher voltage margin but less space-critical designs. | Select only if −50V rating is mandatory and board area is not constrained; not AEC-Q101 qualified. |
Compared with DSS3515MQ, DSS3515Q-7 offers identical performance in alternate packaging, while ZXTN25050DFHTA trades automotive qualification and miniaturization for higher voltage tolerance-making it unsuitable for space- and reliability-critical automotive modules.
Availability
DSS3515MQ is available at Aetrix Electronics and suitable for automotive body electronics, engine control units, and LED lighting systems requiring stable component supply, AEC-Q101 compliance, and ultra-compact thermal-efficient switching.
Supply support for DSS3515MQ 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 consumer markets.
The DSS3515MQ belongs to Diodes' automotive-qualified BJT portfolio, engineered specifically for space-constrained, thermally demanding load-switching applications in vehicles-including door modules, lighting, and powertrain subsystems.
FAQ
What is the maximum continuous collector current for DSS3515MQ?
The DSS3515MQ supports −500mA continuous collector current at TA = +25°C on a standard PCB layout. Derating applies above +25°C: at +85°C ambient, max IC drops to approximately −350mA due to thermal limits defined by RθJA = 310°C/W and PD = 400mW (min pad) or 1000mW (enhanced copper).
How is the exposed collector pad used in PCB layout?
The exposed collector pad (Pin 3) must be soldered to a dedicated thermal copper pour connected to internal or external ground planes. Diodes recommends minimum 25mm × 25mm 2oz copper for optimal RθJA = 120°C/W. The pad is electrically tied to the collector and serves as the primary heat dissipation path-not a separate grounding point.
Is DSS3515MQ pin-compatible with other DFN-3 packages?
No-DSS3515MQ uses the proprietary X1-DFN1006-3 outline (1.0mm × 0.6mm), distinct from industry-standard DFN1006-3 variants. Pin assignments (E-B-C) and pad dimensions differ from generic DFN-3 footprints; using incorrect land patterns risks solder joint failure and thermal performance degradation.
Can DSS3515MQ replace a traditional SOT-23 PNP transistor?
Yes, functionally-but not mechanically. It replaces SOT-23 PNP transistors in high-density designs where board area is critical. Layout redesign is required: X1-DFN1006-3 has 13× smaller footprint and different pin order (E-B-C vs. E-C-B in many SOT-23s). Thermal performance improves significantly with proper copper implementation.
DSS3515MQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-UFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 15 V
- Vce Saturation (Max) @ Ib, Ic:
- 250mV @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 10mA, 2V
- Power - Max:
- 400 mW
- Frequency - Transition:
- 340MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X1-DFN1006-3
DSS3515MQ-7 FAQ
1.How can I place an order for DSS3515MQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DSS3515MQ-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 DSS3515MQ-7 reliable?
The price and inventory of DSS3515MQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DSS3515MQ-7 is usually 5 days.
3.What payment methods are accepted for DSS3515MQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DSS3515MQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DSS3515MQ-7?
DSS3515MQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DSS3515MQ-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 DSS3515MQ-7?
For technical support, including DSS3515MQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DSS3515MQ-7 requirements.
6.How does Aetrix verify that DSS3515MQ-7 is sourced from the original manufacturer or authorized distributors?
All DSS3515MQ-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 DSS3515MQ-7 meets industry standards.
7.What is the process for return or replacement of DSS3515MQ-7?
All DSS3515MQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DSS3515MQ-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 DSS3515MQ-7 part is unused and in its original packaging.
Return procedure for DSS3515MQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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