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Diodes Incorporated DFLT15A-7
- Part No.:
- DFLT15A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLT15A-7.pdf
- Description:
- TVS DIODE 15VWM 24.4VC PWRDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:97,169
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Product details
Overview
DFLT15A-7 from Diodes Incorporated is a unidirectional transient voltage suppressor (TVS) diode in PowerDI123 package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 15V reverse standoff voltage (VRWM), 16.7–18.5V breakdown voltage (VBR), 24.4V clamping voltage (VC) at 9.22A peak pulse current, and 225W peak pulse power dissipation (10/1000µs waveform), deployed in automotive infotainment power input stages.
For engineers reviewing the DFLT15A-7 datasheet, DFLT15A-7 pinout, DFLT15A-7 application, or DFLT15A-7 equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, IEC 61000-4-5 surge current handling, thermal resistance (RθJS = 6°C/W), and AEC-Q101 qualification status for automotive use cases.
Technical Context
This TVS operates in avalanche breakdown mode during transients, with a cathode-band-marked unidirectional polarity enabling precise placement across positive-rail-to-ground paths. Its low RθJS (6°C/W) and 1.0W steady-state power rating support sustained operation under repetitive low-energy surges when mounted on 2oz copper pads.
The device complies with IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) immunity standards via its sub-25V clamping performance at rated IPP and fast response time (<1 ns), ensuring robust protection for 12V automotive subsystems without compromising signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 15 V - Maximum continuous DC voltage before leakage exceeds 1.0 µA; sets upper limit for normal operating rail voltage. |
| Breakdown Voltage (VBR) | 16.7–18.5 V @ IT = 1.0 mA - Confirmed avalanche onset range; ensures reliable triggering above VRWM with margin. |
| Clamping Voltage (VC) | 24.4 V @ IPP = 9.22 A - Peak voltage seen by protected circuit during 10/1000µs surge; must stay below downstream IC absolute max rating. |
| Peak Pulse Power (PPK) | 225 W (10/1000µs) - Sustains defined surge energy without failure; derates linearly above +25°C ambient per Fig. 1. |
| Thermal Resistance (RθJS) | 6 °C/W - Junction-to-solder-joint thermal path; enables efficient heat transfer to PCB copper pad for reliability under repeated stress. |
| Capacitance (CT) | ~35 pF @ VR = 0 V, f = 1 MHz - Low parasitic capacitance preserves high-speed signal integrity in data line protection applications. |
Pinout & Package
Package: PowerDI123 - surface-mount, single-diode configuration with cathode band marking; molded green plastic (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., 12V supply rail); conducts during reverse-biased transient events. |
| Cathode | Ground reference | Connected to system ground; forms clamping path; marked by visible band on package top view. |
Key Features
| Feature | Design Value |
|---|---|
| 225W peak pulse power | Supports IEC 61000-4-5 Level 3 (1kV/2Ω) surge compliance on 12V systems without derating. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage stress on downstream components while maintaining fast response. |
| PowerDI123 footprint | Enables high-density PCB layout with 3.7 mm × 1.78 mm body and 2.8 mm pad pitch (E1). |
| AEC-Q101 qualified variant available | DFLT15AQ version meets automotive stress testing requirements for engine control and body electronics. |
Applications
| Automotive Power Input Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: 12V battery-fed infotainment head unit exposed to load dump and jump-start transients. IC Role / Device Role: Primary TVS clamp placed between fuse output and DC-DC converter input. Use Value: Limits transient voltage to ≤24.4V, preventing damage to 28V-rated buck controller and preserving system uptime. | Use Scenario: 4–20mA current loop transmitter in factory automation PLC I/O module. IC Role / Device Role: Signal-line TVS protecting analog front-end op-amp inputs from ESD and field-wiring faults. Use Value: 35pF capacitance avoids bandwidth degradation; 24.4V clamping protects 36V op-amp rails without adding filtering delay. |
| USB-C Power Delivery Line | Telecom PoE Midspan Port |
Use Scenario: VBUS line protection in USB-C receptacle on portable docking station. IC Role / Device Role: Unidirectional TVS on 5–20V programmable power supply path. Use Value: Clamps 15kV ESD (IEC 61000-4-2) to <30V within 1ns, meeting USB-IF compliance without sacrificing insertion loss. | Use Scenario: 48V DC power feed protection in IEEE 802.3bt Type 4 PoE midspan injector. IC Role / Device Role: Secondary overvoltage clamp after primary DC-DC isolation stage. Use Value: Withstands 100A surge (per IEC 61000-4-5) with 225W rating and 6°C/W thermal path, reducing thermal runaway risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Same VRWM (15V), higher VC (24.5V), SMA package (RθJA = 100°C/W vs. 6°C/W) | Limited to lower-duty-cycle surges due to inferior thermal performance | Prefer DFLT15A-7 where board space allows PowerDI123 and thermal management is critical. |
| DFLT15AQ | Identical electrical specs; AEC-Q101 qualified, PPAP-capable, manufactured in IATF 16949 facility | Required for automotive production programs with change control and audit traceability | Select DFLT15AQ for Tier 1 automotive BOMs; DFLT15A-7 suffices for industrial prototypes and non-automotive volume production. |
Compared with SMAJ15A, DFLT15A-7 delivers 94% lower junction-to-solder thermal resistance-enabling 3× longer surge duty cycle in thermally constrained layouts-while DFLT15AQ adds automotive-grade process controls without altering electrical behavior.
Availability
DFLT15A-7 is available at Aetrix Electronics and suitable for automotive infotainment power input protection, industrial sensor interface circuits, and USB-C power delivery line protection requiring stable component supply and consistent parametric performance across production lots.
Supply support for DFLT15A-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 targets high-reliability transient suppression in automotive and industrial environments, emphasizing low clamping ratio, AEC-Q101-compliant variants, and thermally optimized PowerDI packaging for demanding power rail protection.
FAQ
What is the maximum operating temperature for DFLT15A-7?
The DFLT15A-7 has an operating junction temperature range of –65°C to +150°C. Its thermal resistance (RθJS = 6°C/W) allows safe operation up to +150°C junction temperature when mounted on a 2oz copper pad with adequate solder joint thermal conduction, per datasheet Figure 5 derating curve.
Does DFLT15A-7 meet automotive qualification standards?
DFLT15A-7 itself is not AEC-Q101 qualified; however, the functionally identical DFLT15AQ variant is fully AEC-Q101 qualified, PPAP-capable, and produced in IATF 16949-certified facilities. Diodes explicitly states that automotive-compliant versions are available under separate part numbering (DFLTXXXAQ).
How does the PowerDI123 package improve thermal performance over SMA?
The PowerDI123 package achieves RθJS = 6°C/W versus ~100°C/W for SMA packages by integrating a direct copper leadframe thermal path from die to cathode tab, eliminating epoxy thermal barriers. This enables 16× better heat transfer to the PCB, supporting higher surge repetition rates in compact designs.
Can DFLT15A-7 be used for bidirectional transient suppression?
No-DFLT15A-7 is a unidirectional TVS diode, intended only for DC rail-to-ground protection with defined polarity. For AC or bidirectional signal line protection, a dedicated bidirectional TVS (e.g., DMLP15A) or back-to-back unidirectional pair would be required; using DFLT15A-7 in reverse bias risks permanent breakdown.
DFLT15A-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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 9.22A
- 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
DFLT15A-7 FAQ
1.How can I place an order for DFLT15A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLT15A-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 DFLT15A-7 reliable?
The price and inventory of DFLT15A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLT15A-7 is usually 5 days.
3.What payment methods are accepted for DFLT15A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLT15A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLT15A-7?
DFLT15A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLT15A-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 DFLT15A-7?
For technical support, including DFLT15A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLT15A-7 requirements.
6.How does Aetrix verify that DFLT15A-7 is sourced from the original manufacturer or authorized distributors?
All DFLT15A-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 DFLT15A-7 meets industry standards.
7.What is the process for return or replacement of DFLT15A-7?
All DFLT15A-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLT15A-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 DFLT15A-7 part is unused and in its original packaging.
Return procedure for DFLT15A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLT15A-7 Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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