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Diodes Incorporated DFLT15AQ-7
- Part No.:
- DFLT15AQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLT15AQ-7.pdf
- Description:
- Transient Voltage Suppressor PDI
- Quantity:
- Payment:
- Shipping:
Inventory:8,393
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Product details
Overview
DFLT15AQ-7 from Diodes Incorporated is an AEC-Q101 qualified automotive-grade transient voltage suppressor (TVS) diode in PowerDI 123 package, designed for unidirectional overvoltage protection. It features a 15 V reverse standoff voltage, 24.4 V max clamping voltage at 9.22 A peak pulse current, and 225 W peak pulse power dissipation (10/1000 µs waveform), targeting CAN bus and LIN interface line protection in engine control units.
For engineers reviewing the DFLT15AQ-7 datasheet, DFLT15AQ-7 pinout, DFLT15AQ-7 application, or DFLT15AQ-7 equivalent, key selection criteria include clamping voltage margin relative to system rail, IPP capability under ISO 7637-2 Pulse 1/2a/5a stress, thermal resistance (RθJS = 6 °C/W), and AEC-Q101 qualification status for under-hood deployment.
Technical Context
This TVS operates in avalanche breakdown mode during transients, with a tightly controlled 16.7–18.5 V breakdown voltage range at 1.0 mA test current. Its low RθJS of 6 °C/W enables effective heat transfer from junction to solder point, supporting sustained operation in high-ambient environments up to +150 °C.
The device exhibits <1.0 µA reverse leakage at 15 V standoff and 24.4 V clamping at 9.22 A (10/1000 µs), delivering fast response (<1 ns) and low capacitance (≈100 pF at 0 V bias), making it suitable for protecting high-speed data lines without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 15 V - Maximum continuous operating voltage before clamping begins; sets upper limit for protected circuit rail. |
| Breakdown Voltage (VBR) | 16.7–18.5 V @ 1.0 mA - Confirmed avalanche onset range; ensures reliable triggering above nominal rail. |
| Max Clamping Voltage (VC) | 24.4 V @ 9.22 A - Peak voltage seen by protected IC during worst-case transient; must stay below IC absolute maximum rating. |
| Peak Pulse Power (PPK) | 225 W (10/1000 µs) - Sustains standardized surge energy per ISO 7637-2; derates linearly above +25°C ambient. |
| Thermal Resistance (RθJS) | 6 °C/W - Junction-to-solder-point path enables efficient PCB heat sinking; critical for under-hood thermal management. |
| Operating Temperature | −55 to +150 °C - Validated for engine compartment placement; supports full automotive temperature range. |
Pinout & Package
Package: PowerDI 123 - Surface-mount plastic package with cathode band marking, 0.01 g mass, UL 94V-0 rated molding compound, and matte tin–annealed copper leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink path | Connected to protected line; conducts surge current to ground when clamped. |
| Cathode | Reference node / Ground return | Connected to system ground plane; forms low-inductance return path for surge current. |
| Cathode Band | Polarity indicator | Visible marking on top surface identifying cathode terminal; prevents reverse installation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use with PPAP support and IATF 16949 manufacturing; required for ECU, body control, and ADAS modules. |
| 225 W peak pulse rating | Meets ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 5a (load dump with clamp) energy requirements. |
| Low clamping ratio (VC/VRWM = 1.63) | Minimizes overvoltage stress on downstream CAN/LIN transceivers while maintaining noise immunity margin. |
| RθJS = 6 °C/W | Enables direct thermal coupling to PCB ground plane; reduces junction temperature rise by >50% vs. standard SOD-123. |
Applications
| Engine Control Unit (ECU) CAN Bus Protection | Body Control Module (BCM) LIN Bus Protection |
|---|---|
Use Scenario: Protects CAN_H/CAN_L lines in gasoline/diesel engine ECUs against load dump and inductive switching transients per ISO 7637-2. IC Role / Device Role: Unidirectional TVS placed between CAN transceiver I/O pins and chassis ground. Use Value: Limits clamped voltage to 24.4 V, staying within ±40 V absolute max rating of industry-standard CAN transceivers (e.g., TJA1042, SN65HVD230). | Use Scenario: Shields LIN slave nodes (e.g., door modules, sensors) from battery supply disturbances and ESD events. IC Role / Device Role: Single-line TVS connected between LIN bus and ground, upstream of LIN transceiver input. Use Value: Delivers sub-100 pF capacitance to preserve LIN signal edge integrity at 19.2 kbps, while surviving 100 A/10 ms pulses. |
| Advanced Driver Assistance Systems (ADAS) Camera Link Protection | Electric Power Steering (EPS) Motor Driver Protection |
Use Scenario: Safeguards FPD-Link III or GMSL serial video links between radar/camera sensors and domain controllers. IC Role / Device Role: Low-capacitance TVS on differential video data lanes to suppress ESD and board-level surges. Use Value: 24.4 V clamping ensures no latch-up or damage to serializer/deserializer ICs rated for 30 V max supply. | Use Scenario: Guards H-bridge gate driver inputs and current sense lines against back-EMF spikes during motor commutation. IC Role / Device Role: TVS on low-side current sense amplifier inputs referenced to motor ground. Use Value: Withstands repetitive 9.22 A pulses without degradation, enabling robust fault detection in 12 V EPS systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Same VRWM (15 V), but lower PPK (400 W), higher VC (24.4 V → 25.1 V), larger SMA package (RθJA = 150 °C/W). | Not AEC-Q101 qualified; lacks PPAP documentation and IATF 16949 traceability. | Select when cost sensitivity outweighs automotive compliance and thermal performance requirements. |
| TPSMF15A | Same VRWM, identical PowerDI 123 package, but lower PPK (200 W), slightly higher VC (25.0 V @ 8.5 A). | Qualified to AEC-Q101 but not PPAP capable; limited production lot traceability. | Choose where full PPAP support is unnecessary but automotive qualification and small footprint remain mandatory. |
Compared with SMAJ15A and TPSMF15A, DFLT15AQ-7 delivers superior thermal performance (RθJS = 6 °C/W), guaranteed PPAP readiness, and tighter clamping consistency-critical for safety-critical ECU designs requiring zero field returns under transient stress.
Availability
DFLT15AQ-7 is available at Aetrix Electronics and suitable for engine control units, body control modules, and advanced driver assistance systems requiring stable component supply across multi-year automotive production cycles.
Supply support for DFLT15AQ-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions, with design, testing, and manufacturing facilities certified to IATF 16949 and AEC-Q101 standards.
The DFLT series targets automotive transient suppression, engineered specifically for ISO 7637-2 and ISO 16750-2 compliance in harsh under-hood environments with extended temperature and reliability demands.
FAQ
What is the meaning of the "-7" suffix in DFLT15AQ-7?
The "-7" suffix denotes tape-and-reel packaging: 3,000 units per 7-inch reel with 8 mm tape width. It is the standard automotive-grade ordering option and does not affect electrical or thermal specifications. The base device (DFLT15AQ) is identical in performance; only packaging differs.
Is DFLT15AQ-7 suitable for bidirectional transient protection?
No. DFLT15AQ-7 is a unidirectional TVS diode, optimized for clamping positive transients on grounded lines. For bidirectional protection (e.g., AC-coupled data lines), a symmetric device like DFLU15AQ or SMAJ15CA is required. Its cathode-band polarity must be observed during layout.
How does the PowerDI 123 package improve thermal performance over SOD-123?
PowerDI 123 uses a thermally enhanced copper leadframe with direct die-to-tab thermal path, achieving RθJS = 6 °C/W versus ~120 °C/W for SOD-123. This allows 2× higher steady-state power handling and faster transient heat dissipation into the PCB ground plane, verified per JESD51-14.
Can DFLT15AQ-7 replace older DFL015M devices in legacy designs?
Yes-DFLT15AQ-7 is a direct functional upgrade: same VRWM, improved clamping (24.4 V vs. 25.5 V), higher PPK (225 W vs. 200 W), and full AEC-Q101/PPAP compliance. Pin-compatible in PowerDI 123 footprint; no layout changes needed. Diodes confirms backward compatibility in application note AN-8012.
DFLT15AQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- POWERDI®123
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 9.22A
- Power - Peak Pulse:
- 225W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
DFLT15AQ-7 FAQ
1.How can I place an order for DFLT15AQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLT15AQ-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 DFLT15AQ-7 reliable?
The price and inventory of DFLT15AQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLT15AQ-7 is usually 5 days.
3.What payment methods are accepted for DFLT15AQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLT15AQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLT15AQ-7?
DFLT15AQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLT15AQ-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 DFLT15AQ-7?
For technical support, including DFLT15AQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLT15AQ-7 requirements.
6.How does Aetrix verify that DFLT15AQ-7 is sourced from the original manufacturer or authorized distributors?
All DFLT15AQ-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 DFLT15AQ-7 meets industry standards.
7.What is the process for return or replacement of DFLT15AQ-7?
All DFLT15AQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLT15AQ-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 DFLT15AQ-7 part is unused and in its original packaging.
Return procedure for DFLT15AQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLT15AQ-7 Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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