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Diodes Incorporated DFLT36AQ-7
- Part No.:
- DFLT36AQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLT36AQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PDI
- Quantity:
- Payment:
- Shipping:
Inventory:6,244
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Product details
Overview
DFLT36AQ-7 from Diodes Incorporated is an AEC-Q101-qualified, surface-mount Transient Voltage Suppressor (TVS) diode in PowerDI®123 package, designed for automotive electronics protection. It features 36 V reverse standoff voltage, 40.0–44.2 V breakdown voltage at 1.0 mA test current, 58.1 V max clamping voltage at 3.87 A peak pulse current, and 225 W peak pulse power (10/1000 µs waveform).
For engineers reviewing the DFLT36AQ-7 datasheet, DFLT36AQ-7 pinout, DFLT36AQ-7 application, or DFLT36AQ-7 equivalent, key selection factors include clamping performance under ISO 7637-2/ISO 16750-2 transients, thermal resistance (RθJS = 6 °C/W), AEC-Q101 qualification status, and compatibility with FR-4 PCB layouts using PowerDI123 footprint.
Technical Context
This unidirectional TVS diode operates as a shunt-type overvoltage protector, conducting when reverse voltage exceeds VRWM = 36 V to clamp transient energy away from sensitive downstream circuitry. Its low RθJS = 6 °C/W enables efficient heat transfer to the PCB cathode pad, supporting sustained surge handling in constrained automotive ECUs.
The device meets IATF 16949 manufacturing requirements and is PPAP-capable, with lead-free, halogen- and antimony-free "Green" construction. Its 1.0 W DC power dissipation and -55 °C to +150 °C operating range support under-hood deployment in engine control, body electronics, and ADAS modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 36 V - Maximum continuous reverse voltage before significant leakage; sets operating margin for 24 V automotive systems. |
| Breakdown Voltage (VBR) | 40.0–44.2 V @ 1.0 mA - Confirmed avalanche onset range; ensures reliable triggering during load-dump or inductive switching events. |
| Max Clamping Voltage (VC) | 58.1 V @ IPP = 3.87 A - Measured clamping level under 10/1000 µs surge; protects 40 V-rated ICs in CAN/LIN nodes. |
| Peak Pulse Power (PPK) | 225 W (10/1000 µs) - Sustains standardized ISO 7637-2 Pulse 5a/b energy without failure; validated per AEC-Q101 stress tests. |
| Thermal Resistance (RθJS) | 6 °C/W - Junction-to-solder-point value confirms effective heat conduction to PCB copper; enables compact layout without heatsink. |
| Operating Temperature | -55 °C to +150 °C - Full automotive grade range; supports placement near power MOSFETs or MCU power supplies. |
Pinout & Package
Package: PowerDI®123 - Surface-mount, single-diode configuration with cathode band marking; molded green compound, UL 94V-0 rated, 0.01 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Protected Line Terminal | Connected to line under protection (e.g., CAN_H, LIN bus, sensor supply); carries surge current into device during clamping. |
| Cathode | Clamp Return / Ground Reference | Connected to system ground or low-impedance return path; serves as primary thermal interface to PCB copper pad. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive use per stress test conditions including HTOL, TCT, ESD-HBM/MM, and surge; supports PPAP submission. |
| Low RθJS | 6 °C/W junction-to-solder-point thermal resistance enables high-power transient absorption without localized overheating on standard FR-4. |
| Green Construction | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb); RoHS 3 compliant with lead-free matte tin terminations. |
| PowerDI123 Footprint | Compact 3.7 mm × 1.78 mm outline with 2.8 mm × 2.6 mm pad layout; compatible with automated SMT assembly and reflow profiles. |
Applications
| Automotive CAN Bus Protection | Engine Control Unit (ECU) Power Input |
|---|---|
|
Use Scenario: Protecting high-speed CAN transceivers against ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 5a (load dump) transients. IC Role / Device Role: Unidirectional shunt TVS placed between CAN_H/CAN_L lines and ground to clamp voltage excursions below transceiver absolute maximum ratings. Use Value: Maintains signal integrity by limiting clamping voltage to 58.1 V while absorbing 225 W surges-within safe margin for 40 V-rated CAN PHYs. |
Use Scenario: Safeguarding 24 V input rails of engine control units exposed to battery reversal, jump-start spikes, and alternator load dump. IC Role / Device Role: Primary overvoltage clamp on main power entry point, upstream of DC-DC converters and microcontroller LDOs. Use Value: Withstands 3.87 A peak pulse current at 58.1 V clamping, enabling robust compliance with ISO 16750-2 Class III/IV requirements. |
| Body Control Module (BCM) LIN Bus | ADAS Camera Power Supply |
|
Use Scenario: Securing LIN bus nodes in door modules and seat controllers against ESD and board-level transients during vehicle assembly or service. IC Role / Device Role: Low-capacitance TVS (typ. 120 pF at 0 V) placed across LIN data line and ground to suppress fast-rising ESD without distorting 19.2 kbps signaling. Use Value: 36 V standoff allows full LIN operating range (12 V ±10 %) while clamping sub-60 V-preserving communication reliability during EMC testing. |
Use Scenario: Protecting 12 V camera power inputs in rear-view and surround-view systems subjected to hot-swap and cable discharge events. IC Role / Device Role: Front-end transient suppressor on camera module's main power rail, coordinated with downstream ceramic capacitors for broadband filtering. Use Value: 225 W pulse rating and -55 °C to +150 °C operation ensure reliability in under-bumper mounting locations with wide ambient swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A | Same 36 V VRWM, but SMA package (larger footprint, RθJA = 40 °C/W vs. 120 °C/W); 400 W PPK (10/1000 µs). | Higher power rating but inferior thermal coupling; unsuitable for space-constrained automotive PCBs requiring low-profile mounting. | Select only if higher surge margin is needed and thermal budget permits larger footprint. |
| SMCJ36A | Same 36 V VRWM, SMC package; 1500 W PPK; RθJA = 15 °C/W; 10× heavier (0.12 g). | Designed for industrial power supplies-not AEC-Q101 qualified; lacks PPAP documentation and automotive change control. | Use only in non-automotive applications where qualification and traceability are not required. |
Compared with SMAJ36A and SMCJ36A, DFLT36AQ-7 delivers superior thermal performance in automotive-grade packaging, with verified AEC-Q101 qualification and optimized footprint for ECU space constraints-making it the preferred choice for production automotive designs.
Availability
DFLT36AQ-7 is available at Aetrix Electronics and suitable for automotive CAN bus protection, engine control unit (ECU) power input, and ADAS camera power supply applications requiring stable component supply and full AEC-Q101 compliance.
Supply support for DFLT36AQ-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, specializing in high-reliability components for automotive, industrial, and computing markets.
DFLT36AQ-7 belongs to Diodes' AEC-Q101-qualified PowerDI® TVS portfolio, engineered specifically for automotive transient suppression in space- and thermal-constrained environments such as ECUs, body electronics, and ADAS subsystems.
FAQ
What is the clamping voltage of DFLT36AQ-7 at 3.87 A peak pulse current?
The maximum clamping voltage (VC) of DFLT36AQ-7 is 58.1 V when subjected to a 10/1000 µs waveform with IPP = 3.87 A. This value is measured per JEDEC standards and confirmed in the DS39043 datasheet Table on page 2, ensuring predictable overvoltage protection for downstream 40 V-rated ICs.
Is DFLT36AQ-7 qualified for automotive use?
Yes, DFLT36AQ-7 is AEC-Q101 qualified, manufactured in IATF 16949 certified facilities, and PPAP capable. Its qualification includes HTOL, temperature cycling, ESD-HBM/MM, and surge testing per automotive stress requirements-documented in Diodes' product definitions portal and datasheet Section 1.
What is the thermal resistance from junction to solder point (RθJS) for DFLT36AQ-7?
DFLT36AQ-7 has a specified RθJS of 6 °C/W, measured from the die center to the cathode tab solder junction. This low value reflects its PowerDI123 package design optimized for direct thermal conduction to the PCB, enabling efficient heat dissipation during repetitive surge events.
Does DFLT36AQ-7 have a cathode band marking?
Yes, DFLT36AQ-7 uses a cathode band marking on the top surface of the PowerDI123 package to identify the cathode terminal. This aligns with industry-standard polarity identification and is visible in the mechanical drawings on page 4 of DS39043 Rev. 6-2.
DFLT36AQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- POWERDI®123
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 3.87A
- 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
DFLT36AQ-7 FAQ
1.How can I place an order for DFLT36AQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLT36AQ-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 DFLT36AQ-7 reliable?
The price and inventory of DFLT36AQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLT36AQ-7 is usually 5 days.
3.What payment methods are accepted for DFLT36AQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLT36AQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLT36AQ-7?
DFLT36AQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLT36AQ-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 DFLT36AQ-7?
For technical support, including DFLT36AQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLT36AQ-7 requirements.
6.How does Aetrix verify that DFLT36AQ-7 is sourced from the original manufacturer or authorized distributors?
All DFLT36AQ-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 DFLT36AQ-7 meets industry standards.
7.What is the process for return or replacement of DFLT36AQ-7?
All DFLT36AQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLT36AQ-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 DFLT36AQ-7 part is unused and in its original packaging.
Return procedure for DFLT36AQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLT36AQ-7 Tags
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