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Diodes Incorporated SMF4L7.0A-7
- Part No.:
- SMF4L7.0A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L7.0A-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:8,489
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Product details
Overview
SMF4L7.0A-7 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with a 7.0V working peak reverse voltage, 7.78V minimum breakdown voltage, and 12.0V maximum clamping voltage at 10A. It delivers 33.3A peak pulse current under 10/1000µs waveform and exhibits <200µA reverse leakage at VRWM. It is used for ESD and surge protection on low-voltage DC power rails in automotive body electronics and battery interface circuits.
For engineers reviewing the SMF4L7.0A-7 datasheet, SMF4L7.0A-7 pinout, SMF4L7.0A-7 application, or SMF4L7.0A-7 equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD tolerance, IEC61000-4-2 ±30kV air/contact ESD capability, DO-219AA footprint compatibility, and unidirectional polarity alignment with DC supply topology.
Technical Context
This TVS operates as a voltage-clamped shunt protector: when transient voltage exceeds its breakdown threshold (7.78–8.6V), it avalanches to divert surge current away from downstream circuitry while holding voltage across the protected node ≤12.0V at 10A. Its sub-1ns response time ensures suppression before sensitive logic or analog components are stressed.
Designed for high-reliability DC rail protection, it supports JEDEC-standard surge immunity and meets AEC-Q200 stress requirements when sourced as automotive-grade variants. The DO-219AA package enables compact placement near connectors or power entry points without compromising thermal dissipation (RθJA = 96°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W (10/1000µs waveform); sustains single surges up to 43.8A without failure |
| Working Peak Reverse Voltage | 7.0V; sets maximum continuous DC bias before leakage rises significantly |
| Breakdown Voltage Range | 7.78V–8.6V @ 10mA; defines precise avalanche onset for predictable clamping |
| Maximum Clamping Voltage | 12.0V @ 10A; limits voltage seen by protected ICs during worst-case transients |
| ESD Withstand | ±30kV air / ±30kV contact per IEC61000-4-2; eliminates need for secondary ESD stages |
| Reverse Leakage Current | ≤200µA @ 7.0V; avoids excessive quiescent power loss in always-on battery systems |
| Package | DO-219AA; 2.8mm × 1.9mm footprint with cathode band marking for unidirectional polarity |
Pinout & Package
DO-219AA is a two-terminal surface-mount package with cathode band indicating the cathode terminal. The device has no internal pins-its terminals are the anode and cathode leads formed from a copper alloy lead frame with matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC return path for surge current | Connected to system ground or low-side reference; completes shunt path during avalanche |
| Cathode (marked) | Protected line connection | Connected to the rail being protected (e.g., +7V battery input); voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| IEC61000-4-2 ESD robustness | ±30kV air/±30kV contact rating ensures full-system ESD compliance without external capacitors |
| Fast avalanche response | <1.0ns turn-on time prevents overshoot beyond clamping voltage during nanosecond-scale transients |
| Green packaging | Halogen- and antimony-free molding compound (Br+Cl <1500ppm, Sb <1000ppm) meets automotive environmental mandates |
| Thermal reliability | RθJA = 96°C/W enables stable operation up to +175°C junction temperature in sealed enclosures |
Applications
| Automotive Body Control Module (BCM) | USB-C Power Delivery Input Protection |
|---|---|
Use Scenario: Protecting 5–12V supply inputs in door modules, seat controllers, and lighting drivers exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and GND, clamping transients before they reach PMIC or microcontroller LDOs. Use Value: Limits clamped voltage to 12.0V, staying within 13.2V absolute max rating of common 12V-input PMICs and preventing latch-up or oxide damage. | Use Scenario: Safeguarding USB-C PD sink controller power input (VBUS) against hot-plug surges and cable-induced ESD events. IC Role / Device Role / Timing Role: Primary front-end TVS on VBUS rail, positioned upstream of buck converter and PD controller IC. Use Value: Absorbs ±30kV contact ESD per IEC61000-4-2 while maintaining <200µA leakage to avoid depleting battery during standby. |
| Industrial 24V Sensor Interface | Li-ion Battery Protection Circuit |
Use Scenario: Shielding analog front-end ICs and ADC references on 24V fieldbus nodes from induced lightning surges and switching noise. IC Role / Device Role / Timing Role: Secondary-level TVS on regulated 3.3V/5V auxiliary rails derived from 24V input, complementing primary MOV-based protection. Use Value: Provides precise 12.0V clamping with minimal capacitance, avoiding signal integrity degradation on high-speed sensor lines. | Use Scenario: Guarding battery management IC (BMS) supply pins against ESD during assembly, handling, and end-user charging cycles. IC Role / Device Role / Timing Role: Unidirectional TVS connected between battery+ and system ground, directly adjacent to BMS IC VDD pin. Use Value: Withstands repeated ±30kV ESD strikes without parametric shift, preserving long-term accuracy of cell voltage monitoring. |
Availability
SMF4L7.0A-7 is available at Aetrix Electronics and suitable for automotive body electronics, USB-C power delivery designs, industrial sensor interfaces, and Li-ion battery protection circuits requiring stable component supply and consistent DO-219AA footprint availability.
Supply support for SMF4L7.0A-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, specializing in high-reliability protection, power management, and signal integrity solutions for automotive, industrial, and consumer markets.
The SMF4L series belongs to Diodes' high-power TVS portfolio designed specifically for robust, space-constrained overvoltage protection in automotive and portable power systems where low clamping voltage and ultra-fast response are critical.
FAQ
Is SMF4L7.0A-7 unidirectional or bidirectional?
SMF4L7.0A-7 is unidirectional, indicated by the absence of "C" in the part number and confirmed by its cathode band marking. It conducts only during reverse-biased overvoltage events and blocks forward current like a standard diode, making it suitable for DC power rail protection where polarity is fixed.
What is the maximum operating temperature for SMF4L7.0A-7?
The SMF4L7.0A-7 has an operating junction temperature range of –55°C to +175°C. Its thermal resistance (RθJA = 96°C/W) allows reliable operation at ambient temperatures up to +125°C on standard FR-4 PCBs with recommended 2 oz. copper pads, meeting under-hood automotive requirements.
How does SMF4L7.0A-7 compare to SMAJ7.0A in layout and performance?
SMF4L7.0A-7 uses the smaller DO-219AA package (2.8 × 1.9 mm) versus SMAJ7.0A's DO-214AC (4.5 × 2.7 mm), saving >50% board area. It offers identical 7.0V VRWM and 12.0V VC but with higher 33.3A IPP (vs. 32.1A) and lower 200µA IR - enabling tighter integration in space-limited automotive ECUs.
Does SMF4L7.0A-7 meet AEC-Q200 requirements?
The base SMF4L7.0A-7 is not AEC-Q200 qualified; however, Diodes offers automotive-grade versions (e.g., SMF4L7.0AQ-7) with AEC-Q200 qualification, PPAP documentation, and manufacturing in IATF 16949-certified facilities - available upon request for automotive production programs.
SMF4L7.0A-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-219AA
- Series:
- SMF4L
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 33.3A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AA
SMF4L7.0A-7 FAQ
1.How can I place an order for SMF4L7.0A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L7.0A-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 SMF4L7.0A-7 reliable?
The price and inventory of SMF4L7.0A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L7.0A-7 is usually 5 days.
3.What payment methods are accepted for SMF4L7.0A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L7.0A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L7.0A-7?
SMF4L7.0A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L7.0A-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 SMF4L7.0A-7?
For technical support, including SMF4L7.0A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L7.0A-7 requirements.
6.How does Aetrix verify that SMF4L7.0A-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L7.0A-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 SMF4L7.0A-7 meets industry standards.
7.What is the process for return or replacement of SMF4L7.0A-7?
All SMF4L7.0A-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L7.0A-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 SMF4L7.0A-7 part is unused and in its original packaging.
Return procedure for SMF4L7.0A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L7.0A-7 Tags
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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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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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