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Diodes Incorporated DFLT220A-7
- Part No.:
- DFLT220A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLT220A-7.pdf
- Description:
- TVS DIODE 220VWM 375VC PWRDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:4,400
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Product details
Overview
DFLT220A-7 from Diodes Incorporated is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 220V reverse standoff voltage, 276V maximum breakdown voltage at 1mA, 375V clamping voltage at 0.6A peak pulse current, and 225W peak pulse power dissipation (10/1000µs waveform). It is used in automotive body control modules to protect LIN bus transceivers against ISO 7637-2 pulse 1 and pulse 2b surges.
For engineers reviewing the DFLT220A-7 datasheet, DFLT220A-7 pinout, DFLT220A-7 application, or DFLT220A-7 equivalent, key selection criteria include clamping voltage margin relative to system operating voltage, peak pulse current capability under standardized surge waveforms, thermal resistance to PCB copper pad, RoHS/Green compliance status, and PowerDI123 package compatibility with automated SMT assembly.
Technical Context
This TVS diode operates in avalanche breakdown mode to clamp transient overvoltages above its standoff threshold. Its unidirectional configuration provides low-leakage (<5µA @ 220V) during normal operation while delivering fast response (<1ns) to sub-microsecond transients.
The device uses a planar junction structure optimized for stable breakdown characteristics across temperature (-65°C to +150°C), with thermal resistance from junction to solder point of 6°C/W enabling reliable power dissipation into standard FR-4 PCB pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 220V - Maximum continuous DC voltage the device blocks without clamping; sets upper limit for protected circuit operating voltage. |
| Breakdown Voltage (VBR) | 242–276V @ 1mA - Confirmed avalanche initiation range; ensures predictable turn-on before downstream component damage thresholds. |
| Clamping Voltage (VC) | 375V @ 0.6A - Maximum voltage seen by protected circuit during 10/1000µs surge; defines worst-case stress on downstream ICs. |
| Peak Pulse Power (PPK) | 225W (10/1000µs) - Energy-handling capacity per transient event; validates suitability for ISO 7637-2 Pulse 1 (inductive load dump). |
| Junction-to-Solder Thermal Resistance | 6°C/W - Enables efficient heat transfer from die to PCB cathode pad; supports sustained reliability under repeated surge events. |
| Operating Temperature Range | -65°C to +150°C - Qualified for under-hood automotive environments and industrial power supply applications. |
Pinout & Package
Package: PowerDI123 - Surface-mount plastic package with exposed cathode tab for thermal and electrical connection; dimensions: 3.70mm × 1.78mm × 1.00mm (L × W × H); moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during clamping | Connected to protected line (e.g., LIN bus line); forms low-impedance path to ground when transient exceeds VRWM. |
| Cathode | Current exit terminal during clamping | Connected to system ground plane; large copper pad required for thermal dissipation and low-inductance return path. |
| Cathode Tab (exposed bottom) | Thermal & electrical ground interface | Integral metal slug soldered directly to PCB ground pour; reduces RθJS to 6°C/W and lowers clamping impedance. |
Key Features
| Feature | Design Value |
|---|---|
| 225W peak pulse power (10/1000µs) | Validates robustness against automotive load-dump transients per ISO 7637-2 without derating at +85°C ambient. |
| RoHS-compliant, halogen- and antimony-free "Green" construction | Meets EU Directive 2015/863/EU with Br+Cl <1500ppm and Sb <1000ppm; supports automotive PPAP documentation requirements. |
| PowerDI123 package with exposed cathode tab | Enables 6°C/W junction-to-solder thermal resistance and supports 3000-unit tape-and-reel packaging for high-volume SMT placement. |
| Low leakage current (<5µA @ VRWM) | Minimizes standby power loss in always-on automotive modules such as door ECU and seat control units. |
Applications
| Automotive LIN Bus Protection | Industrial 24V DC Power Input |
|---|---|
|
Use Scenario: Protecting LIN transceivers in body control modules from battery line transients during load dump and jump-start conditions. IC Role / Device Role: Unidirectional TVS placed between LIN data line and chassis ground to clamp ISO 7637-2 Pulse 1 (−100V/50Ω) and Pulse 2b (−100V/2Ω). Use Value: Clamps to ≤375V within 1ns, limiting stress on MAX13051 or TLE7259-3GE transceivers rated for 40V absolute maximum. |
Use Scenario: Safeguarding programmable logic controllers (PLCs) powered from 24V industrial supplies subject to switching surges and lightning-induced coupling. IC Role / Device Role: Primary overvoltage clamp on 24V input rail upstream of DC/DC converters and microcontroller power regulators. Use Value: Absorbs 225W surges without degradation, maintaining system uptime where MIL-STD-461 RS103 immunity up to 200V/m is required. |
| Telecom Remote Power Feeds | Medical Equipment DC Power Rails |
|
Use Scenario: Protecting PoE-powered remote radio units receiving 48V DC over long cable runs susceptible to induced lightning surges. IC Role / Device Role: Secondary surge suppression stage after primary gas discharge tube, handling residual energy not shunted externally. Use Value: 375V clamping ensures protected DC/DC controller (e.g., LM5017) remains below its 65V VIN max rating during Category A (1kV/2Ω) transients. |
Use Scenario: Securing auxiliary 12V rails in diagnostic imaging systems where power integrity affects sensor calibration stability. IC Role / Device Role: Final-stage transient suppressor on isolated DC output of medical-grade AC/DC adapters feeding FPGA-based image processors. Use Value: -65°C to +150°C operation supports sterilization cycles and extended shelf life; <5µA leakage avoids drift in precision analog front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ220A | Same 220V VRWM, but SMB package (RθJA = 15°C/W vs. 6°C/W); 200W PPK (10/1000µs); VF = 3.5V @ 12A. | Limited thermal performance in high-density layouts; requires larger PCB copper area for equivalent power handling. | Select when legacy SMB footprint is fixed and surge repetition rate is low; avoid in space-constrained automotive modules. |
| DFLT220AQ-7 | AEC-Q101 qualified version; identical electrical specs; manufactured in IATF 16949 facility; PPAP-capable. | Required for production automotive ECUs; includes full change control, lot traceability, and qualification reports. | Specify for Tier 1 OEM programs; DFLT220A-7 is suitable for prototyping, industrial, or non-safety-critical automotive subsystems. |
Compared with SMBJ220A, DFLT220A-7 delivers 125% lower junction-to-solder thermal resistance and 12.5% higher peak power rating in a 30% smaller footprint; versus DFLT220AQ-7, it offers identical surge performance at lower cost and lead time for non-automotive applications.
Availability
DFLT220A-7 is available at Aetrix Electronics and suitable for automotive LIN bus protection, industrial 24V DC power inputs, telecom remote power feeds, and medical equipment DC power rails requiring stable component supply across design-in, prototyping, and volume production phases.
Supply support for DFLT220A-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 engineered specifically for high-reliability transient suppression in automotive and industrial power systems, emphasizing low clamping ratio, AEC-Q101 readiness, and thermally efficient surface-mount packaging.
FAQ
What is the maximum clamping voltage of DFLT220A-7 under standard test conditions?
The maximum clamping voltage (VC) is 375V at a peak pulse current (Ipp) of 0.6A using the 10/1000µs waveform. This value is measured with the device mounted on a standard FR-4 PCB with 1-inch-square 2oz copper pad, and represents the worst-case voltage imposed on protected circuitry during surge events.
Does DFLT220A-7 meet automotive qualification standards?
DFLT220A-7 is not AEC-Q101 qualified; however, an automotive-compliant variant-DFLT220AQ-7-is available with full AEC-Q101 stress testing, IATF 16949 manufacturing, and PPAP documentation support. DFLT220A-7 is suitable for non-safety-critical automotive subsystems and industrial applications.
How does the PowerDI123 package improve thermal performance compared to SMB?
The PowerDI123 package integrates an exposed cathode tab that bonds directly to the PCB ground plane, achieving a junction-to-solder thermal resistance of 6°C/W-2.5× lower than typical SMB packages (~15°C/W). This enables higher surge repetition rates and improved long-term reliability in thermally constrained layouts.
Can DFLT220A-7 be used in bidirectional configurations?
No-DFLT220A-7 is a unidirectional TVS diode intended for DC circuits with defined polarity. For bidirectional protection (e.g., AC signal lines), Diodes offers the DMLF220A series or discrete back-to-back diode arrangements; using DFLT220A-7 in reverse-biased AC applications risks permanent breakdown.
DFLT220A-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):
- 220V
- Voltage - Breakdown (Min):
- 242V
- Voltage - Clamping (Max) @ Ipp:
- 375V
- Current - Peak Pulse (10/1000µs):
- 600mA
- 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
DFLT220A-7 FAQ
1.How can I place an order for DFLT220A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLT220A-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 DFLT220A-7 reliable?
The price and inventory of DFLT220A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLT220A-7 is usually 5 days.
3.What payment methods are accepted for DFLT220A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLT220A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLT220A-7?
DFLT220A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLT220A-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 DFLT220A-7?
For technical support, including DFLT220A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLT220A-7 requirements.
6.How does Aetrix verify that DFLT220A-7 is sourced from the original manufacturer or authorized distributors?
All DFLT220A-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 DFLT220A-7 meets industry standards.
7.What is the process for return or replacement of DFLT220A-7?
All DFLT220A-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLT220A-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 DFLT220A-7 part is unused and in its original packaging.
Return procedure for DFLT220A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLT220A-7 Tags
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Diodes Incorporated
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