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Diodes Incorporated DFLT26AQ-7
- Part No.:
- DFLT26AQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLT26AQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PDI
- Quantity:
- Payment:
- Shipping:
Inventory:3,354
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Product details
Overview
DFLT26AQ-7 from Diodes Incorporated is a 26V unidirectional transient voltage suppressor (TVS) diode in PowerDI™123 package, rated for 225W peak pulse power (10/1000µs), 42.1V max clamping voltage at 5.35A IPP, and AEC-Q101 qualified for automotive electronics protection against ESD and surge events.
For engineers reviewing the DFLT26AQ-7 datasheet, DFLT26AQ-7 pinout, DFLT26AQ-7 application, or DFLT26AQ-7 equivalent, this TVS diode delivers verified clamping performance, IATF 16949-manufactured reliability, RoHS- and halogen-free compliance, and precise 26V reverse standoff voltage for robust overvoltage protection in CAN, LIN, and sensor interface circuits.
Technical Context
This unidirectional TVS operates as a shunt-clamping device with avalanche breakdown behavior, triggered when reverse voltage exceeds 26V standoff and clamping within 42.1V at 5.35A peak pulse current. Its low RθJS of 6°C/W enables effective thermal transfer to PCB copper pads under transient stress.
The device uses a planar junction structure optimized for fast response (<1 ns typical), low capacitance (≈100 pF at 0 V bias), and stable leakage (<1 µA at 26V). It is designed for placement directly across protected signal lines-such as automotive body control module inputs-to divert surge energy to ground before IC damage occurs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 26 V - Maximum continuous operating voltage before clamping begins; defines safe DC operating margin for 24V automotive systems. |
| Breakdown Voltage (VBR min/max) | 28.9 V / 31.9 V - Confirmed avalanche onset range at 1.0 mA test current; ensures consistent triggering across temperature and lot variation. |
| Max Clamping Voltage (VC) | 42.1 V - Measured at 5.35 A peak pulse current (10/1000 µs); limits voltage seen by downstream ICs during ISO 7637-2 Pulse 1/2/5a transients. |
| Peak Pulse Power (PPK) | 225 W - Sustained for single 10/1000 µs waveform; supports protection against load dump surges up to Level III per ISO 16750-2. |
| Thermal Resistance (RθJS) | 6 °C/W - Junction-to-solder-joint value; enables reliable operation with minimal board copper area (1"² 2 oz Cu pad). |
| Capacitance (CT) | ≈100 pF @ 0 V - Low enough to avoid signal integrity degradation on 1 Mbps CAN or 20 kHz LIN bus lines. |
Pinout & Package
Package: PowerDI™123 surface-mount package with cathode band marking; molded green compound (UL 94V-0), 0.01 g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected line (e.g., CAN_H); conducts surge current toward cathode during overvoltage event. |
| Cathode | Ground reference | Connected to system ground plane; provides low-inductance return path for clamped current; marked with band. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling (-55°C to +150°C), humidity, and mechanical shock per JESD47. |
| IATF 16949 manufacturing | Produced in certified facilities with PPAP documentation support for Tier-1 OEM programs. |
| Halogen- and antimony-free | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb; satisfies EU ELV Directive and automotive sustainability requirements. |
| Low clamping ratio (VC/VRWM) | 1.62 - Ensures tight voltage margin between standoff and clamp, minimizing risk of overvoltage damage to 3.3V/5V interface ICs. |
Applications
| Automotive Body Control Module (BCM) | Infotainment System Power Input |
|---|---|
Use Scenario: Protecting 12V supply rail feeding microcontroller and CAN transceiver in door module. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed between VIN and GND, activated within nanoseconds of load dump or jump-start surge. Use Value: Limits transient voltage to ≤42.1 V, preventing latch-up or gate oxide rupture in 5V LDOs and 3.3V MCU I/O cells. |
Use Scenario: Safeguarding 5V/3.3V power domain of head unit display controller against battery reversal or alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input filter stage; coordinates with upstream fuse and downstream ceramic capacitors. Use Value: Withstands ≥225W pulses without degradation, maintaining long-term reliability across 15-year vehicle lifecycle. |
| Engine Control Unit (ECU) Sensor Interface | Telematics Control Unit (TCU) CAN Bus Line |
Use Scenario: Guarding analog inputs (e.g., MAP, TPS sensors) connected to 5V reference rail. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted adjacent to connector pins to minimize trace inductance and improve ESD immunity. Use Value: 100 pF capacitance avoids signal distortion on 0–5V ratiometric sensor outputs while passing ISO 10605 ±8 kV contact discharge. |
Use Scenario: Bidirectional protection on CAN_H/CAN_L differential pair in cellular-connected gateway module. IC Role / Device Role / Timing Role: Unidirectional DFLT26AQ-7 used on each line (with separate ground reference) to handle common-mode surges per ISO 11898-2. Use Value: Clamps to 42.1 V before CAN transceiver's absolute maximum rating (40 V) is exceeded, preserving bus communication integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A | Same 26V VRWM, but 400W PPK (400W vs. 225W), SMA package (larger footprint, higher RθJA = 40°C/W). | Higher power handling suits industrial 24V PLC I/O modules; less suitable for space-constrained automotive PCBs. | Select SMAJ26A only if >300W surge margin is required and board layout allows SMA footprint. |
| DFLT24AQ-7 | 24V VRWM, 38.9V VC at 5.78A IPP; lower clamping voltage but reduced standoff margin for 24V nominal systems. | Better for 12V systems with tighter voltage margins; may misfire on normal 24V rail ripple in dual-battery architectures. | Choose DFLT24AQ-7 only when protecting 12V subsystems where 26V standoff causes unnecessary derating. |
Compared with SMAJ26A and DFLT24AQ-7, DFLT26AQ-7 uniquely balances automotive-grade reliability, compact PowerDI123 footprint, and optimal 26V standoff for modern 12V/24V hybrid vehicle networks-making it the preferred choice for ECU, BCM, and telematics designs requiring AEC-Q101 validation and IATF 16949 traceability.
Availability
DFLT26AQ-7 is available at Aetrix Electronics and suitable for automotive body control modules, infotainment power supplies, and telematics CAN interface protection requiring stable component supply and full AEC-Q101 compliance.
Supply support for DFLT26AQ-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 integrated circuits, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
DFLT26AQ-7 belongs to Diodes' AEC-Q101-qualified TVS diode family engineered specifically for automotive electronics protection-emphasizing low clamping ratio, high surge robustness, and green material compliance for next-generation vehicle ECUs and ADAS subsystems.
FAQ
What is the maximum operating temperature for DFLT26AQ-7?
The DFLT26AQ-7 has an operating junction temperature range of –55°C to +150°C, validated per AEC-Q101 stress tests. At ambient temperatures above +25°C, its peak pulse power must be derated linearly per Figure 1 in DS39043 Rev. 6–2, reaching ~150W at +85°C ambient.
Is DFLT26AQ-7 bidirectional or unidirectional?
DFLT26AQ-7 is a unidirectional TVS diode, designed to clamp only reverse-polarity transients. Its cathode band marking indicates polarity, and it must be installed with cathode tied to ground to protect positive-rail signals. It does not suppress positive-going surges on grounded lines.
Can DFLT26AQ-7 replace SMAJ26A in existing designs?
No direct drop-in replacement: DFLT26AQ-7 uses PowerDI123 (2.8 × 1.6 mm) while SMAJ26A uses SMA (4.5 × 2.7 mm). Layout redesign is required. Also, DFLT26AQ-7's lower PPK (225W vs. 400W) and superior thermal resistance (6°C/W vs. 40°C/W) shift thermal design priorities-verify pulse energy compliance per IEC 61000-4-5.
Does DFLT26AQ-7 meet ISO 16750-2 Pulse 5a requirements?
Yes-its 225W peak pulse rating at 10/1000 µs waveform corresponds to 100 V/10 Ω test condition (IEC 61000-4-5 Level 3), satisfying ISO 16750-2 Pulse 5a (load dump) for 12V systems when properly mounted on ≥1"² 2 oz Cu pad per datasheet thermal note.
DFLT26AQ-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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 5.35A
- 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
DFLT26AQ-7 FAQ
1.How can I place an order for DFLT26AQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLT26AQ-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 DFLT26AQ-7 reliable?
The price and inventory of DFLT26AQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLT26AQ-7 is usually 5 days.
3.What payment methods are accepted for DFLT26AQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLT26AQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLT26AQ-7?
DFLT26AQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLT26AQ-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 DFLT26AQ-7?
For technical support, including DFLT26AQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLT26AQ-7 requirements.
6.How does Aetrix verify that DFLT26AQ-7 is sourced from the original manufacturer or authorized distributors?
All DFLT26AQ-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 DFLT26AQ-7 meets industry standards.
7.What is the process for return or replacement of DFLT26AQ-7?
All DFLT26AQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLT26AQ-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 DFLT26AQ-7 part is unused and in its original packaging.
Return procedure for DFLT26AQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLT26AQ-7 Tags
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