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Diodes Incorporated DFLT24A-7
- Part No.:
- DFLT24A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLT24A-7.pdf
- Description:
- TVS DIODE 24VWM 38.9VC PWRDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:12,093
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Product details
Overview
DFLT24A-7 from Diodes Incorporated is a unidirectional transient voltage suppressor (TVS) diode in PowerDI123 package, designed for automotive and industrial overvoltage protection. It features 24V reverse standoff voltage, 38.9V max clamping voltage at 5.78A peak pulse current, 225W peak pulse power (10/1000µs), and operates from −65°C to +150°C - deployed in DC power rail protection for engine control units and infotainment power supplies.
For engineers reviewing the DFLT24A-7 datasheet, DFLT24A-7 pinout, DFLT24A-7 application, or DFLT24A-7 equivalent, key selection criteria include clamping voltage margin vs. protected IC VMAX, IPP derating above +25°C, thermal resistance (RθJS = 6°C/W), and AEC-Q101 qualification status for automotive use cases.
Technical Context
This TVS diode uses a planar silicon avalanche structure optimized for fast response (<1 ps typical) to ESD and surge transients. Its unidirectional configuration provides low forward voltage (3.5V @ 12A) while maintaining tight breakdown tolerance (26.7–29.5V) and sub-1µA leakage at 19.2V (80% VRWM).
The device is rated for 50A non-repetitive forward surge (8.3ms half-sine) and exhibits 125°C/W junction-to-ambient thermal resistance on standard FR-4 with 1-inch² 2oz copper pad - enabling robust thermal management in space-constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 24 V - Maximum continuous DC voltage before significant leakage; sets operating margin below protected circuit's absolute maximum rating. |
| Breakdown Voltage (VBR) | 26.7–29.5 V @ 1.0 mA - Confirmed avalanche onset range; ensures reliable triggering without premature conduction during normal operation. |
| Max Clamping Voltage (VC) | 38.9 V @ 5.78 A - Peak voltage seen by downstream circuit during 10/1000µs surge; determines survivability of 3.3V/5V logic rails. |
| Peak Pulse Power (PPK) | 225 W (10/1000µs) - Sustains defined surge energy per IEEE C62.41; validates suitability for Level 3 lightning-induced surges in 12V automotive systems. |
| Junction-to-Solder Point RθJS | 6 °C/W - Enables direct thermal path to PCB ground plane; supports >1.5W steady-state dissipation with <10°C rise under proper layout. |
| Operating Temperature Range | −65°C to +150°C - Qualified for under-hood automotive environments and industrial motor drive control modules. |
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 | Input/Line-side connection | Connected to protected line (e.g., 12V battery rail); conducts surge current toward cathode during overvoltage event. |
| Cathode | Ground-reference terminal | Connected to system ground or low-impedance return path; forms clamping node with anode to limit transient voltage swing. |
Key Features
| Feature | Design Value |
|---|---|
| 225W peak pulse power (10/1000µs) | Supports ISO 7637-2 Pulse 5a/b immunity testing for automotive 12V systems without external heat sinking. |
| Low clamping ratio (VC/VRWM = 1.62) | Minimizes voltage overshoot relative to standoff rating - critical for protecting 24V-rated CAN transceivers and microcontrollers. |
| RθJS = 6°C/W | Enables >1.2W continuous power handling with ≤10°C junction rise when soldered to 2oz copper thermal pad - reduces need for auxiliary cooling. |
| AEC-Q101 qualified variant available (DFLT24AQ) | Validated for automotive-grade reliability including HTOL, temperature cycling, and ESD HBM ≥8kV - required for Tier 1 ECU designs. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects 24V sensor input lines (e.g., door latch, seat position switches) against load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamps transients to <39V within <1 ns, preserving integrity of MCU GPIO and level-shifter inputs. Use Value: Prevents latch-up and permanent damage to 3.3V/5V interface ICs during 100V/50ms load dump events per ISO 16750-2. |
Use Scenario: Shields 24V digital input channels in programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Acts as primary front-end clamp ahead of optocoupler or Schmitt-trigger input stage. Use Value: Maintains signal integrity during 4kV contact ESD (IEC 61000-4-2) and 1kV ring wave (IEC 61000-4-12) without false triggering. |
| Telecom Power Supply Rail | Medical Diagnostic Equipment Interface |
Use Scenario: Guards 24V DC-DC converter outputs feeding baseband processing boards against cross-talk and backfeed surges. IC Role / Device Role / Timing Role: Fast-response TVS limits voltage excursion during hot-swap insertion and output capacitor inrush. Use Value: Ensures <39V clamping during 10/1000µs 225W pulses - prevents brownout or reset of FPGA and ADC power domains. |
Use Scenario: Protects isolated 24V communication interfaces (e.g., RS-485 medical data links) from ESD and defibrillator discharge coupling. IC Role / Device Role / Timing Role: Primary transient suppression element placed at connector entry point before isolation barrier. Use Value: Achieves <100pF capacitance at 16V bias (per Fig. 7), avoiding signal integrity degradation in 250kbps differential bus applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A (onsemi) | Same 24V VRWM, but 400W PPK (10/1000µs); larger SMA package (RθJA = 150°C/W vs. 125°C/W); VF = 3.5V identical. | Higher surge capacity suits heavy-industrial 48V systems; less suitable for dense automotive PCBs due to larger footprint and thermal limitations. | Select when surge energy exceeds 225W and board space allows SMA footprint; verify layout thermal relief matches higher RθJA. |
| SMCJ24A (Littelfuse) | 24V VRWM, 1500W PPK (10/1000µs); DO-214AB package; RθJA = 100°C/W; VC = 38.9V identical; VF = 3.5V. | Designed for high-energy lightning protection (IEC 61000-4-5 Level 4); overqualified for most automotive BCM use but ideal for outdoor telecom enclosures. | Choose only when system-level surge test requires >1kW capability; avoid in space-constrained automotive modules due to DO-214AB size. |
Compared with SMAJ24A and SMCJ24A, DFLT24A-7 delivers optimal balance of compact PowerDI123 footprint, 225W surge rating, and 6°C/W junction-to-solder thermal path - making it preferred for thermally constrained, high-volume automotive and industrial control applications where precise clamping and layout efficiency are critical.
Availability
DFLT24A-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC digital inputs, and telecom power supply rails requiring stable component supply, consistent lead-time visibility, and long-term lifecycle support.
Supply support for DFLT24A-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 company specializing in discrete, analog, and mixed-signal solutions, with design, manufacturing, and distribution operations across Asia, the Americas, and Europe.
DFLT24A-7 belongs to the DFLTxxxA series of surface-mount TVS diodes engineered specifically for high-reliability transient suppression in automotive and industrial power systems - emphasizing low clamping ratio, tight VBR tolerance, and AEC-Q101-compliant variants.
FAQ
What is the maximum clamping voltage of DFLT24A-7 at its rated peak pulse current?
The maximum clamping voltage (VC) is 38.9 V at 5.78 A peak pulse current (IPP) under the 10/1000 µs waveform condition. This value is measured per JEDEC standards and guarantees the protected circuit will not experience voltage exceeding 38.9 V during specified surge events - critical for ensuring compatibility with 3.3V or 5V logic interfaces downstream.
Is DFLT24A-7 qualified for automotive applications?
DFLT24A-7 itself is not AEC-Q101 qualified; however, the automotive-grade variant DFLT24AQ is fully qualified per AEC-Q101, PPAP-capable, and manufactured in IATF 16949-certified facilities. Engineers targeting automotive production must specify DFLT24AQ - the "-7" suffix denotes tape-and-reel packaging and applies identically to both commercial and automotive versions.
How does the PowerDI123 package improve thermal performance compared to SMA or SMC packages?
The PowerDI123 package achieves RθJS = 6°C/W due to its exposed cathode tab directly soldered to PCB copper, providing a low-resistance thermal path to the board. In contrast, SMA (RθJA ≈ 150°C/W) and SMC (RθJA ≈ 100°C/W) rely on ambient convection and have no dedicated thermal pad - resulting in significantly higher junction temperatures under sustained power dissipation.
Can DFLT24A-7 be used in bidirectional configurations?
No - DFLT24A-7 is a unidirectional TVS diode, intended for DC circuits with defined polarity. For AC or bidirectional signal lines (e.g., RS-485, USB), a bidirectional variant such as DFLU24A or equivalent must be selected. Using DFLT24A-7 in reverse-biased AC applications would result in forward conduction and failure during normal operation.
DFLT24A-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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 5.78A
- 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
DFLT24A-7 FAQ
1.How can I place an order for DFLT24A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLT24A-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 DFLT24A-7 reliable?
The price and inventory of DFLT24A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLT24A-7 is usually 5 days.
3.What payment methods are accepted for DFLT24A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLT24A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLT24A-7?
DFLT24A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLT24A-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 DFLT24A-7?
For technical support, including DFLT24A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLT24A-7 requirements.
6.How does Aetrix verify that DFLT24A-7 is sourced from the original manufacturer or authorized distributors?
All DFLT24A-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 DFLT24A-7 meets industry standards.
7.What is the process for return or replacement of DFLT24A-7?
All DFLT24A-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLT24A-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 DFLT24A-7 part is unused and in its original packaging.
Return procedure for DFLT24A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLT24A-7 Tags
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ESD9B5.0ST5G
onsemi
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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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Diodes Incorporated
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