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Diodes Incorporated SMF4L13AQ-7
- Part No.:
- SMF4L13AQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L13AQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:2,129
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Product details
Overview
SMF4L13AQ from Diodes Incorporated is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in automotive and industrial power rails. It features a 13 V working peak reverse voltage (VRWM), 14.4–15.9 V breakdown voltage (VBR), 21.5 V maximum clamping voltage (VC) at 18.6 A peak pulse current, and 400 W peak pulse power dissipation (10/1000 µs waveform). It is AEC-Q101 qualified and used in battery contact protection circuits.
For engineers reviewing the SMF4L13AQ datasheet, SMF4L13AQ pinout, SMF4L13AQ application, or SMF4L13AQ equivalent, key selection criteria include clamping performance under 18.6 A surge, unidirectional polarity confirmation via cathode band marking, compliance with IEC61000-4-2 ±30 kV ESD, and DO-219AA package thermal resistance (RθJA = 96 °C/W).
Technical Context
This TVS operates as a unidirectional clamp between power rail and ground, triggering when reverse voltage exceeds 14.4 V (min VBR) to limit transients to ≤21.5 V. Its sub-1 ns response time ensures protection against fast ESD events before downstream ICs are damaged.
Designed for automotive-grade reliability, it delivers 400 W peak pulse power handling per 10/1000 µs waveform, supports 40 A non-repetitive forward surge current (IFSM), and maintains <0.5 µA reverse leakage at VRWM - critical for low-power always-on systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 13 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin above 12 V nominal automotive systems. |
| VBR (min/max) | 14.4 V / 15.9 V - Breakdown initiates within this range at 1 mA test current; defines precise turn-on threshold for predictable protection. |
| VC @ IPP | 21.5 V @ 18.6 A - Clamped voltage during worst-case 10/1000 µs surge; limits stress on protected 16 V-rated components. |
| PPK | 400 W - Peak pulse power handling per standard 10/1000 µs waveform; enables robust protection against load dump and ISO 7637-2 pulses. |
| ESD Rating | ±30 kV (air/contact) per IEC61000-4-2 - Guarantees immunity to human-body-model ESD events without degradation. |
| RθJA | 96 °C/W - Junction-to-ambient thermal resistance on 1" × 1" FR-4 board; informs derating above +25°C ambient for sustained reliability. |
Pinout & Package
Package: DO-219AA - ultra-compact surface-mount molded plastic case (1.90 mm × 2.80 mm × 0.60 mm), halogen- and antimony-free, RoHS-compliant, with matte tin-plated copper alloy leadframe and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Power Rail Connection | Connected to protected line (e.g., battery+); conducts only during forward surge (IFSM = 40 A). |
| Cathode | Ground Reference / Clamp Node | Marked by cathode band; sinks transient current to ground when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 qualified, PPAP capable, manufactured in IATF 16949 certified facilities - meets OEM supply chain requirements. |
| Ultra-fast response | <1.0 ns turn-on time from 0 V to VBR - intercepts ESD and fast transients before system-level damage occurs. |
| Green packaging | Halogen- and antimony-free, UL 94V-0 rated molding compound - satisfies environmental compliance for global automotive programs. |
| Low leakage | <0.5 µA IR at VRWM - minimizes standby power loss in always-on vehicle modules (e.g., CAN wake-up circuits). |
Applications
| Battery Contact Protection | Automotive Power Distribution |
|---|---|
Use Scenario: Direct connection to 12 V lead-acid or Li-ion battery terminals exposed to hot-plug, reverse polarity, and load dump events. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery+ and chassis ground to shunt surges before reaching fuse box or DC-DC converters. Use Value: Limits clamping voltage to 21.5 V during 18.6 A transients, protecting downstream 24 V-rated fuses and relay drivers from overvoltage failure. |
Use Scenario: Protection of main power rail feeding body control modules (BCM), lighting controllers, and infotainment head units. IC Role / Device Role / Timing Role: Primary overvoltage suppression device upstream of LDOs and PMICs; activated within 1 ns of ISO 7637-2 pulse onset. Use Value: Withstands 400 W peak pulse energy and maintains <0.5 µA leakage, enabling reliable operation across -40°C to +125°C ambient ranges. |
| Infotainment USB Port ESD Protection | Engine Control Unit (ECU) Sensor Power Line |
Use Scenario: Secondary-level ESD protection on 5 V USB VBUS lines in automotive infotainment systems subject to user-accessible ports. IC Role / Device Role / Timing Role: Back-to-back TVS pair (with bi-directional variant) or standalone unidirectional clamp referenced to 5 V rail ground. Use Value: Delivers ±30 kV IEC61000-4-2 air/contact ESD immunity while adding <1 pF junction capacitance - no signal integrity impact on USB 2.0 data lines. |
Use Scenario: 12 V sensor supply line (e.g., MAP, O2, crankshaft position sensors) routed near ignition coils and alternators. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to sensor connector to suppress coupled transients before entering analog front-end circuitry. Use Value: Clamps induced spikes to ≤21.5 V within nanoseconds, preventing latch-up or ADC offset errors in precision sensor signal chains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A | DO-214AC package; higher RθJA (125 °C/W); same VRWM/VBR but VC = 21.5 V @ 17.3 A. | Larger footprint (4.5 mm × 2.7 mm vs. 2.0 mm × 2.8 mm); less suitable for space-constrained automotive modules. | Choose SMAJ13A only if legacy PCB layout prohibits DO-219AA rework and thermal budget allows higher junction temperature rise. |
| TPSMD13A | DO-214AB package; 400 W rating; VC = 21.2 V @ 18.4 A; AEC-Q101 qualified but not PPAP-capable. | Same footprint as SMAJ but lacks full automotive change control documentation required for Tier 1 OEM programs. | Select TPSMD13A for cost-sensitive industrial designs where PPAP and IATF 16949 traceability are not mandated. |
Compared with SMAJ13A and TPSMD13A, SMF4L13AQ offers superior space efficiency (DO-219AA), lower thermal resistance, and full automotive production support - making it optimal for next-gen compact ECUs and ADAS domain controllers requiring validated supply chain continuity.
Availability
SMF4L13AQ is available at Aetrix Electronics and suitable for automotive battery management, power distribution modules, and infotainment system ESD protection requiring stable component supply across multi-year production cycles.
Supply support for SMF4L13AQ 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 SMF4Lx.xAQ series belongs to Diodes' AEC-Q101-qualified TVS portfolio, engineered specifically for automotive power rail and interface protection with emphasis on low clamping, fast response, and green packaging compliance.
FAQ
What is the polarity configuration of SMF4L13AQ?
SMF4L13AQ is a unidirectional TVS diode, indicated by a visible cathode band on the DO-219AA package. It conducts only in reverse bias above VBR (14.4–15.9 V) and blocks forward current up to 3 V at 16 A - essential for protecting positive-rail systems without interfering with normal operation.
Does SMF4L13AQ meet automotive qualification standards?
Yes - SMF4L13AQ is AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. It undergoes rigorous stress testing including HTOL, temperature cycling, and ESD validation to ensure reliability in under-hood and cabin environments up to +175°C junction temperature.
How does SMF4L13AQ perform under repeated surge conditions?
SMF4L13AQ is rated for non-repetitive 10/1000 µs pulses per Figure 4 in DS43393. For repetitive surges, derating is required: peak power must be reduced linearly above +25°C ambient per Figure 1, and cumulative energy must stay below single-pulse limits to avoid thermal runaway or parametric shift.
Can SMF4L13AQ replace older SMAJ13A devices on existing PCBs?
No - SMF4L13AQ uses DO-219AA (2.0 mm × 2.8 mm), while SMAJ13A uses DO-214AC (4.5 mm × 2.7 mm). Pad layout, solder stencil, and thermal relief must be redesigned. Electrical replacement is feasible, but mechanical drop-in is not possible without board revision.
SMF4L13AQ-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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AA
SMF4L13AQ-7 FAQ
1.How can I place an order for SMF4L13AQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L13AQ-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 SMF4L13AQ-7 reliable?
The price and inventory of SMF4L13AQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L13AQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L13AQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L13AQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L13AQ-7?
SMF4L13AQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L13AQ-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 SMF4L13AQ-7?
For technical support, including SMF4L13AQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L13AQ-7 requirements.
6.How does Aetrix verify that SMF4L13AQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L13AQ-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 SMF4L13AQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L13AQ-7?
All SMF4L13AQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L13AQ-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 SMF4L13AQ-7 part is unused and in its original packaging.
Return procedure for SMF4L13AQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L13AQ-7 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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