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Diodes Incorporated DFLT26A-7
- Part No.:
- DFLT26A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLT26A-7.pdf
- Description:
- TVS DIODE 26VWM 42.1VC PWRDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:14,835
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Product details
Overview
DFLT26A-7 from Diodes Incorporated is a unidirectional 26V standoff transient voltage suppressor (TVS) diode in PowerDI123 package, rated for 225W peak pulse power (10/1000µs), 42.1V clamping voltage at 5.35A peak pulse current, and 1.0W DC power dissipation - deployed for automotive power rail surge protection and industrial I/O interface ESD hardening.
For engineers reviewing the DFLT26A-7 datasheet, DFLT26A-7 pinout, DFLT26A-7 application, or DFLT26A-7 equivalent, key selection criteria include reverse standoff voltage (26V), clamping performance under 10/1000µs waveform, thermal resistance (RθJA = 125°C/W), and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity, designed to shunt transient energy away from sensitive downstream circuitry during ESD, lightning-induced surges, or load-dump events. Its low RθJS (6°C/W) enables effective heat transfer from junction to solder point on FR-4 PCBs.
It exhibits 1.0µA max reverse leakage at VRWM (26V), 28.9–31.9V breakdown range at 1.0mA test current, and 42.1V clamping voltage at 5.35A IPP - confirming tight voltage tolerance and predictable overvoltage response in 12V/24V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 26 V - Maximum continuous DC operating voltage before clamping begins; matches 24V nominal automotive supply rails. |
| Clamping Voltage (VC @ IPP) | 42.1 V - Peak voltage seen by protected circuit at 5.35A transient current; ensures safe margin below 48V system IC absolute maximum ratings. |
| Peak Pulse Power (PPK) | 225 W - Sustained for 10/1000µs waveform; meets ISO 7637-2 Pulse 1 & 2a surge immunity requirements. |
| Junction-to-Ambient Thermal Resistance | 125 °C/W - Measured on FR-4 with 1-inch² 2oz copper pad; defines derating curve for sustained power handling. |
| Breakdown Voltage Range (VBR) | 28.9–31.9 V - Specified at 1.0mA IT; guarantees reliable turn-on without premature conduction during normal operation. |
| Max Reverse Leakage (IR @ VRWM) | 1.0 µA - Confirms minimal standby current draw and negligible impact on low-power sensor or CAN bus circuits. |
Pinout & Package
Package: PowerDI123 - surface-mount, single-diode configuration with cathode band marking; molded green compound (UL 94V-0), 0.01g mass, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink path | Connected to protected line (e.g., 24V rail); conducts during overvoltage event to divert surge to ground. |
| Cathode | Reference/ground return | Connected to system ground plane; forms low-inductance return path critical for sub-10ns ESD response. |
| Cathode Band | Polarity indicator | Visible marking on top surface; ensures correct orientation during automated placement and avoids reverse-bias failure. |
Key Features
| Feature | Design Value |
|---|---|
| 225W peak pulse rating (10/1000µs) | Enables robust protection against ISO 7637-2 load dump transients in 24V commercial vehicle systems. |
| Low clamping ratio (VC/VRWM ≈ 1.62) | Minimizes overvoltage stress on downstream regulators and microcontrollers during surge events. |
| RoHS-compliant, halogen-free "Green" construction | Meets automotive OEM environmental mandates (e.g., BMW GS 95024, VW 80101) without compromising thermal performance. |
| RθJS = 6°C/W (junction-to-solder point) | Supports high-reliability mounting on thermally enhanced pads, reducing thermal runaway risk under repetitive surges. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects 24V power input of BCM from load dump and jump-start surges per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between fused 24V rail and DC-DC converter input. Use Value: Limits transient voltage to ≤42.1V, preventing damage to 45V-rated buck controller ICs and maintaining system uptime. |
Use Scenario: Shields 24V digital input channel from field-wiring induced surges and ESD during maintenance. IC Role / Device Role / Timing Role: Primary front-end protection element ahead of optocoupler or Schmitt-trigger input stage. Use Value: Clamps fast-rising transients (<1ns rise time) with <1.0µA leakage, preserving signal integrity and input threshold accuracy. |
| Commercial Vehicle Telematics Unit | Smart Building HVAC Controller |
Use Scenario: Guards CAN FD transceiver VCC supply against battery line disturbances during engine cranking. IC Role / Device Role / Timing Role: Secondary protection stage after fuse, directly adjacent to transceiver power pin. Use Value: Delivers 5.35A IPP handling with 42.1V VC, ensuring CAN communication remains active during 12V/24V dual-battery transitions. |
Use Scenario: Secures 24V auxiliary power input of HVAC controller against lightning-induced surges on building wiring. IC Role / Device Role / Timing Role: First-line defense on main board power entry, mounted with short trace to chassis ground. Use Value: Withstands 225W pulses without degradation, eliminating need for redundant protection layers in UL 60730-certified designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A | Same 26V VRWM, but lower PPK (400W vs. 225W), larger SMA package (RθJA = 150°C/W), no AEC-Q101 qualification. | Used in non-automotive industrial equipment where space and thermal constraints are less stringent. | Select when cost is prioritized over automotive qualification and board space is available for larger footprint. |
| DFLT26AQ-7 | AEC-Q101 qualified variant with identical electrical specs; same PowerDI123 package and marking FCE. | Required for production automotive ECUs needing PPAP documentation and IATF 16949 traceability. | Choose for Tier 1 automotive programs where change control, lot traceability, and qualification evidence are mandatory. |
Compared with SMAJ26A, DFLT26A-7 offers superior thermal performance and automotive-grade process control; compared with DFLT26AQ-7, it lacks formal AEC-Q101 certification but shares identical electrical behavior and packaging - making it suitable for pre-qualification prototyping or non-safety-critical automotive subsystems.
Availability
DFLT26A-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, telematics gateways, and smart building control systems requiring stable component supply across multi-year production cycles.
Supply support for DFLT26A-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 for automotive, industrial, computing, and consumer markets.
DFLT26A-7 belongs to the DFLTxxxA series of high-power TVS diodes engineered specifically for ruggedized 12V/24V automotive and industrial power rail protection - emphasizing low clamping ratio, AEC-Q101 readiness, and green packaging compliance.
FAQ
What is the maximum clamping voltage of DFLT26A-7 at its rated peak pulse current?
The DFLT26A-7 clamps to 42.1V at 5.35A peak pulse current (IPP) under the standard 10/1000µs waveform. This value is guaranteed across temperature and process variation per DS30581 Rev. 12–2, page 2, and defines the upper voltage limit imposed on protected circuitry during surge events.
Is DFLT26A-7 qualified to AEC-Q101 for automotive use?
No - DFLT26A-7 is not AEC-Q101 qualified. The automotive-compliant version is DFLT26AQ-7, which carries separate qualification documentation, PPAP capability, and manufacturing in IATF 16949-certified facilities. DFLT26A-7 is intended for industrial and pre-qualification automotive development.
What is the thermal resistance from junction to solder point (RθJS) for DFLT26A-7?
The junction-to-solder-point thermal resistance is 6°C/W, calculated from die center to cathode tab solder junction. This value supports thermal modeling for PCB layout with thermal vias and copper pour, especially under repetitive surge conditions defined in Figure 1 of the datasheet.
How does the PowerDI123 package of DFLT26A-7 compare to SMA in terms of surge handling?
PowerDI123 offers lower RθJA (125°C/W vs. SMA's ~150°C/W) and higher power density than SMA packages. Its integrated cathode tab improves heat spreading and reduces inductance, enabling faster clamping response and better 10/1000µs waveform handling despite identical peak power rating claims.
DFLT26A-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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
DFLT26A-7 FAQ
1.How can I place an order for DFLT26A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLT26A-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 DFLT26A-7 reliable?
The price and inventory of DFLT26A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLT26A-7 is usually 5 days.
3.What payment methods are accepted for DFLT26A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLT26A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLT26A-7?
DFLT26A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLT26A-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 DFLT26A-7?
For technical support, including DFLT26A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLT26A-7 requirements.
6.How does Aetrix verify that DFLT26A-7 is sourced from the original manufacturer or authorized distributors?
All DFLT26A-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 DFLT26A-7 meets industry standards.
7.What is the process for return or replacement of DFLT26A-7?
All DFLT26A-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLT26A-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 DFLT26A-7 part is unused and in its original packaging.
Return procedure for DFLT26A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLT26A-7 Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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