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Diodes Incorporated DFLT20AQ-7
- Part No.:
- DFLT20AQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLT20AQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PDI
- Quantity:
- Payment:
- Shipping:
Inventory:9,812
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Product details
Overview
DFLT20AQ-7 from Diodes Incorporated is an AEC-Q101 qualified, automotive-grade transient voltage suppressor (TVS) diode in PowerDI 123 package, featuring 20 V reverse standoff voltage, 32.4 V max clamping voltage at 6.94 A peak pulse current, and 225 W peak pulse power (10/1000 µs waveform). It provides robust ESD and surge protection for CAN bus, LIN, and automotive sensor interfaces.
For engineers reviewing the DFLT20AQ-7 datasheet, DFLT20AQ-7 pinout, DFLT20AQ-7 application, or DFLT20AQ-7 equivalent, key selection criteria include clamping voltage margin vs. system rail, IPP capability under ISO 16750-2 Pulse 1/2/5a, thermal resistance (RθJS = 6 °C/W), and AEC-Q101 qualification status for under-hood deployment.
Technical Context
This unidirectional TVS diode operates in avalanche breakdown mode to clamp transient overvoltages above its reverse standoff voltage (VRWM = 20 V) while maintaining low leakage (<1.0 µA at 20 V). Its 22.2–24.5 V breakdown range (IT = 1.0 mA) ensures predictable turn-on behavior during fast-rising transients.
The device uses a planar junction structure optimized for low dynamic impedance and stable clamping performance across temperature (–55 °C to +150 °C). Its PowerDI 123 package enables high-current handling (IFSM = 50 A, 8.3 ms half-sine) with minimal PCB footprint and low thermal resistance to solder point (RθJS = 6 °C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage | 20 V - Maximum continuous DC or RMS voltage the device blocks without clamping; sets upper limit for protected line operating voltage. |
| Breakdown Voltage (min/max) | 22.2 V / 24.5 V @ 1.0 mA - Confirmed avalanche onset range; ensures reliable triggering before downstream IC damage thresholds. |
| Max Clamping Voltage | 32.4 V @ 6.94 A - Peak voltage seen by protected circuit during 10/1000 µs surge; must stay below IC absolute maximum ratings. |
| Peak Pulse Power | 225 W (10/1000 µs) - Sustains defined surge energy without failure; derates linearly above +25 °C ambient per Figure 1. |
| Thermal Resistance (J-to-Solder) | 6 °C/W - Enables efficient heat transfer from die to PCB copper; supports high-reliability operation in confined under-hood spaces. |
| Operating Temperature Range | –55 °C to +150 °C - Validated for engine compartment and transmission control module environments per AEC-Q101 stress testing. |
Pinout & Package
Package: PowerDI 123 - Surface-mount, single-diode configuration with cathode band marking on top surface; molded green compound (UL 94V-0), 0.01 g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side terminal | Connected to signal or power line requiring transient suppression; referenced to system ground via cathode. |
| Cathode | Ground/reference terminal | Connected to chassis or PCB ground plane; forms low-impedance path for surge current dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and surge lifetime testing per JESD22-A108. |
| IATF 16949 manufacturing | Produced in certified facilities with PPAP documentation support for Tier-1 automotive supply chain traceability. |
| Green compound & RoHS compliance | Halogen-free (<900 ppm Br/Cl, <1000 ppm Sb), lead-free matte tin finish, compliant with EU RoHS 2015/863/EU. |
| Low clamping ratio | VC/VRWM = 1.62 - Tight voltage margin between standoff and clamping improves system-level surge immunity headroom. |
Applications
| Automotive CAN Bus Protection | Engine Control Unit (ECU) Sensor Inputs |
|---|---|
Use Scenario: Protecting high-speed CAN FD data lines (CANH/CANL) against load dump and ESD events in vehicle body control modules. IC Role / Device Role: Unidirectional TVS placed between CANH and ground, and CANL and ground, to shunt transients without distorting signal integrity. Use Value: Clamps surges to ≤32.4 V while maintaining <1.0 µA leakage at 12 V nominal, preserving common-mode noise rejection and bit error rate. |
Use Scenario: Safeguarding analog inputs of pressure, temperature, and knock sensors connected to ECU microcontrollers. IC Role / Device Role: Point-of-entry TVS on each sensor signal line, positioned upstream of RC filtering and op-amp front-end stages. Use Value: Withstands ISO 16750-2 Pulse 5a (100 V/500 ms) without degradation, ensuring sensor signal fidelity during cranking and alternator load dump. |
| Infotainment System USB Interface | ADAS Camera Power Line Protection |
Use Scenario: Shielding USB 2.0 D+/D− lines in head unit and telematics control units from hot-plug ESD and cable discharge events. IC Role / Device Role: Low-capacitance TVS (CT ≈ 200 pF at 0 V, per Fig. 6 trend) placed differential across data pair with shared cathode ground. Use Value: Limits clamping voltage to 32.4 V while adding <0.3 pF parasitic capacitance per line-no measurable impact on 480 Mbps eye diagram. |
Use Scenario: Protecting 12 V power input to surround-view camera modules exposed to long harness-induced transients in parking assist systems. IC Role / Device Role: Primary surge limiter on main VCC rail, mounted adjacent to connector to intercept energy before DC-DC converter input stage. Use Value: Handles 225 W peak pulse (10/1000 µs) and 50 A surge current (8.3 ms half-sine), preventing brownout or latch-up in image signal processors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Same VRWM (20 V), but lower PPK = 400 W (not 225 W); SMA package (larger footprint, higher RθJA = 150 °C/W). | Not AEC-Q101 qualified; suitable for industrial, not automotive safety-critical nodes. | Select only if AEC-Q101 is not required and board space allows SMA footprint. |
| TPSMD20 | VRWM = 20 V, PPK = 3000 W, but larger SMD package (DO-214AB); higher clamping voltage (36.6 V) and no AEC-Q101 certification. | Designed for AC mains and telecom surge; excessive rating for automotive signal-line protection. | Over-specified for CAN/sensor use; increases cost and PCB area without benefit. |
Compared with SMAJ20A and TPSMD20, DFLT20AQ-7 delivers optimal balance of automotive qualification, compact PowerDI 123 footprint, low RθJS, and precise clamping-making it the preferred choice for space-constrained, thermally demanding automotive signal protection.
Availability
DFLT20AQ-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, engine control units, and ADAS camera modules requiring stable component supply with full AEC-Q101 traceability and IATF 16949 manufacturing assurance.
Supply support for DFLT20AQ-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 North America.
The DFLT series is part of Diodes' automotive-qualified TVS portfolio, engineered specifically for ISO 16750-2 and ISO 7637-2 compliance in harsh-temperature vehicle subsystems.
FAQ
What is the polarity configuration of DFLT20AQ-7?
DFLT20AQ-7 is a unidirectional TVS diode with cathode-banded polarity. The cathode terminal must be connected to system ground, and the anode to the protected line. This configuration ensures low leakage (<1.0 µA at 20 V) during normal operation and rapid avalanche conduction during positive transients on the line.
Does DFLT20AQ-7 meet ISO 16750-2 test requirements?
Yes-DFLT20AQ-7 is AEC-Q101 qualified and designed to withstand ISO 16750-2 Pulse 1 (inductive load dump), Pulse 2a (supply disconnection), Pulse 3a/3b (capacitive coupled transients), and Pulse 5a (surge up to 100 V/500 ms), verified through standardized automotive stress testing at certified labs.
Can DFLT20AQ-7 be used in bidirectional signal protection?
No-DFLT20AQ-7 is unidirectional and unsuitable for bidirectional lines like RS-485 or differential CAN without additional circuitry. For such applications, a pair of DFLT20AQ-7 devices (anode-to-anode) or a dedicated bidirectional TVS (e.g., DFLT20CQ-7) is required to handle both polarities of transient voltage.
What is the recommended PCB layout for thermal performance?
Mount DFLT20AQ-7 on a minimum 1-inch² 2 oz copper pad per the datasheet's thermal test condition. Use multiple thermal vias (≥6 × 0.3 mm) under the cathode tab to inner ground planes, and avoid routing high-speed traces beneath the device to prevent coupling. Pad dimensions should follow Diodes' PowerDI 123 layout guide (X1 = 2.40 mm, X2 = 4.10 mm, Y = 1.50 mm).
DFLT20AQ-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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 6.94A
- 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
DFLT20AQ-7 FAQ
1.How can I place an order for DFLT20AQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLT20AQ-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 DFLT20AQ-7 reliable?
The price and inventory of DFLT20AQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLT20AQ-7 is usually 5 days.
3.What payment methods are accepted for DFLT20AQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLT20AQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLT20AQ-7?
DFLT20AQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLT20AQ-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 DFLT20AQ-7?
For technical support, including DFLT20AQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLT20AQ-7 requirements.
6.How does Aetrix verify that DFLT20AQ-7 is sourced from the original manufacturer or authorized distributors?
All DFLT20AQ-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 DFLT20AQ-7 meets industry standards.
7.What is the process for return or replacement of DFLT20AQ-7?
All DFLT20AQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLT20AQ-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 DFLT20AQ-7 part is unused and in its original packaging.
Return procedure for DFLT20AQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLT20AQ-7 Tags
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Diodes Incorporated
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Diodes Incorporated
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