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Diodes Incorporated DFLT22A-7
- Part No.:
- DFLT22A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLT22A-7.pdf
- Description:
- TVS DIODE 22VWM 35.5VC PWRDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:5,759
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Product details
Overview
DFLT22A-7 from Diodes Incorporated is a unidirectional transient voltage suppressor (TVS) diode in PowerDI123 package, designed for overvoltage protection of DC power rails and signal lines. It features a 22V reverse standoff voltage (VRWM), 24.4–26.9V breakdown voltage (VBR), 35.5V clamping voltage at 6.34A peak pulse current, and 225W peak pulse power dissipation (10/1000µs waveform). It is used in automotive infotainment power inputs to suppress load dump and ISO 7637-2 transients.
For engineers reviewing the DFLT22A-7 datasheet, DFLT22A-7 pinout, DFLT22A-7 application, or DFLT22A-7 equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, peak pulse current capability under IEC 61000-4-5 surge, thermal resistance (RθJS = 6°C/W), and AEC-Q101 qualification status for automotive deployment.
Technical Context
This TVS operates as a unidirectional avalanche clamp: forward-biased during positive transients and reverse-biased during negative surges, with cathode band indicating the anode terminal. Its low RθJS (6°C/W) enables effective heat transfer from junction to PCB solder point, critical for sustained surge handling on compact layouts.
The device meets JEDEC JESD22-A114 reliability standards and is rated for -65°C to +150°C operating temperature. Its 1.0W DC power dissipation and 125°C/W RθJA (on FR-4 with 1"² 2oz copper) define steady-state thermal limits, while clamping performance is validated per IEC 61000-4-5 8/20µs and 10/1000µs waveforms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 22V - Maximum continuous DC voltage before leakage exceeds 1µA; sets upper limit for protected rail voltage. |
| Breakdown Voltage (VBR) | 24.4–26.9V @ 1mA - Confirmed avalanche onset range; ensures reliable triggering before system damage. |
| Clamping Voltage (VC) | 35.5V @ 6.34A - Peak voltage seen by downstream circuit during 10/1000µs surge; defines protection margin. |
| Peak Pulse Power (PPK) | 225W (10/1000µs) - Sustains single high-energy transients without failure; validated per IEC 61000-4-5 Level 4. |
| Thermal Resistance (RθJS) | 6°C/W - Junction-to-solder-point resistance; enables efficient heat extraction into PCB ground plane. |
| Operating Temperature | -65°C to +150°C - Supports under-hood automotive environments and industrial control cabinets. |
Pinout & Package
Package: PowerDI123 - surface-mount, single-diode configuration with cathode band marking; molded green compound (UL 94V-0), 0.01g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode Band Side) | Transient current sink path | Connected to protected line; conducts surge current to ground when clamped. |
| Cathode (Opposite Cathode Band) | Reference/ground return | Typically tied to system ground; forms low-inductance return path for surge energy. |
Key Features
| Feature | Design Value |
|---|---|
| 225W peak pulse power | Enables robust protection against ISO 7637-2 Pulse 5a (load dump) in 12V automotive systems. |
| Low RθJS = 6°C/W | Reduces thermal stress during repetitive surges; supports higher duty-cycle operation than standard SOD-123 devices. |
| Cathode band polarity marking | Ensures correct orientation during automated placement; prevents reverse-bias failure in unidirectional protection schemes. |
| Halogen- and antimony-free "Green" construction | Meets IPC-1752A material declaration requirements and EU RoHS 3 (2015/863/EU) compliance. |
Applications
| Automotive Infotainment Power Input | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12V supply line feeding head unit MCU and display driver ICs exposed to alternator load dump transients. IC Role / Device Role: Unidirectional TVS clamp placed between input fuse and DC-DC converter input. Use Value: Limits transient voltage to ≤35.5V, preserving 36V-rated input capacitors and preventing latch-up in 5V/3.3V regulators. |
Use Scenario: 24V digital input channel receiving signals from field sensors in factory automation cabinets. IC Role / Device Role: Primary surge suppression ahead of optocoupler input stage. Use Value: Clamps IEC 61000-4-5 4kV surges to safe levels, eliminating false triggering and extending optocoupler lifetime. |
| Telecom PoE+ Data Line Protection | Medical Patient Monitor ECG Lead Interface |
Use Scenario: 48V power pair in IEEE 802.3at PoE+ injector output facing lightning-induced surges on outdoor cabling. IC Role / Device Role: Secondary protection after gas discharge tube (GDT), absorbing residual energy. Use Value: 225W rating handles GDT follow-on current; 35.5V clamping protects PoE controller ICs rated to 57V max. |
Use Scenario: Low-noise analog front-end of ECG amplifier connected to patient leads susceptible to ESD and defibrillator pulses. IC Role / Device Role: First-stage transient clamp on differential lead inputs before instrumentation amplifier. Use Value: Sub-10pF capacitance (at 22V VR) avoids signal distortion; 35.5V clamping prevents amplifier saturation during 8kV HBM ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Same VRWM (22V), but lower PPK = 400W (not 225W); SMA package (larger footprint, higher RθJA = 150°C/W). | Higher clamping voltage (35.5V vs. 37.5V) and slower response due to parasitic inductance in SMA leadframe. | Select when board space allows larger package and thermal budget permits higher junction temperature rise. |
| DFLT22AQ-7 | AEC-Q101 qualified version; identical electrical specs but manufactured in IATF 16949 facility with PPAP support. | Required for production automotive ECUs; includes change control, lot traceability, and extended temperature validation (-40°C to +125°C ambient). | Choose for Tier 1 automotive programs where qualification documentation and process control are mandatory. |
Compared with SMAJ22A, DFLT22A-7 offers superior thermal performance (RθJS = 6°C/W vs. ~25°C/W) and smaller footprint, while DFLT22AQ-7 adds automotive-grade process rigor without sacrificing electrical behavior-making it the preferred choice for space-constrained, thermally demanding, or safety-critical deployments.
Availability
DFLT22A-7 is available at Aetrix Electronics and suitable for automotive infotainment power inputs, industrial PLC digital I/O protection, and telecom PoE+ data line protection requiring stable component supply across high-volume production cycles.
Supply support for DFLT22A-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 centers across Asia and manufacturing in ASE, Amkor, and its own facilities.
DFLT22A-7 belongs to the PowerDI® TVS diode family, engineered specifically for high-reliability transient suppression in automotive, industrial, and communications infrastructure where compact size, low thermal resistance, and repeatable clamping are essential.
FAQ
What is the maximum DC operating voltage for DFLT22A-7?
The DFLT22A-7 has a reverse standoff voltage (VRWM) of 22V, meaning it can safely block up to 22V DC continuously without exceeding 1µA leakage. Operation above this voltage risks premature conduction and thermal runaway; it must be applied only to circuits with nominal voltages ≤22V, such as 12V automotive rails or 24V industrial controls.
Does DFLT22A-7 meet AEC-Q101 requirements?
No-DFLT22A-7 is not AEC-Q101 qualified. The automotive-compliant variant is DFLT22AQ-7, which undergoes additional stress testing (HTOL, TCT, ESD), is produced in IATF 16949-certified facilities, and supports PPAP documentation. DFLT22A-7 is intended for commercial/industrial use where automotive qualification is not mandated.
How does the PowerDI123 package improve thermal performance over SOD-123?
The PowerDI123 package uses a copper leadframe with direct die-to-tab thermal path and a large cathode pad area, achieving RθJS = 6°C/W-more than 4× better than typical SOD-123 (RθJS ≈ 25–30°C/W). This allows faster heat transfer to the PCB, reducing junction temperature rise during repetitive surges and enabling higher reliability in thermally constrained designs.
Can DFLT22A-7 be used in bidirectional protection configurations?
No-it is a unidirectional TVS diode, optimized for clamping positive transients on grounded systems. For bidirectional protection (e.g., AC lines or floating interfaces), a dedicated bidirectional TVS like DMLF22A or two DFLT22A-7 devices in series-opposing configuration would be required; using a single DFLT22A-7 in reverse bias risks catastrophic failure due to low reverse breakdown tolerance.
DFLT22A-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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 6.34A
- 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
DFLT22A-7 FAQ
1.How can I place an order for DFLT22A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLT22A-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 DFLT22A-7 reliable?
The price and inventory of DFLT22A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLT22A-7 is usually 5 days.
3.What payment methods are accepted for DFLT22A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLT22A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLT22A-7?
DFLT22A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLT22A-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 DFLT22A-7?
For technical support, including DFLT22A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLT22A-7 requirements.
6.How does Aetrix verify that DFLT22A-7 is sourced from the original manufacturer or authorized distributors?
All DFLT22A-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 DFLT22A-7 meets industry standards.
7.What is the process for return or replacement of DFLT22A-7?
All DFLT22A-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLT22A-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 DFLT22A-7 part is unused and in its original packaging.
Return procedure for DFLT22A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLT22A-7 Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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