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Diodes Incorporated SMF4L6.0AQ-7
- Part No.:
- SMF4L6.0AQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L6.0AQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:3,991
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Product details
Overview
SMF4L6.0AQ 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 6.0 V working peak reverse voltage (VRWM), 6.67–7.37 V breakdown voltage (VBR), 10.3 A maximum reverse surge current (IRSM), 10.3 V clamping voltage (VC) at IRSM, 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 SMF4L6.0AQ datasheet, SMF4L6.0AQ pinout, SMF4L6.0AQ application, or SMF4L6.0AQ equivalent, key selection criteria include clamping performance under 10.3 A surge, unidirectional polarity for DC rail protection, DO-219AA package compatibility with high-density layouts, and compliance with IEC61000-4-2 ±30 kV ESD requirements.
Technical Context
This TVS operates as a unidirectional clamp on DC supply lines, triggering when reverse voltage exceeds 6.67 V (min VBR) to divert transient energy away from sensitive downstream circuitry. Its fast response time (<1.0 ns from 0 V to VBR) ensures suppression before system-level damage occurs during ESD or load-dump events.
The device uses silicon avalanche junction technology in a planar construction, optimized for low clamping ratio (VC/VRWM ≈ 1.72) and stable thermal performance up to +175°C junction temperature. Its DO-219AA package enables low-inductance mounting critical for high-speed transient suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 6.0 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR (min/max) | 6.67 V / 7.37 V - Breakdown threshold range at 10 mA test current; ensures reliable turn-on across temperature and process variation. |
| VC @ IRSM | 10.3 V - Clamping voltage at 10.3 A peak surge; limits downstream voltage stress during transients. |
| PPK | 400 W - Peak pulse power handling (10/1000 µs waveform); supports automotive load-dump and ISO 7637-2 pulse 5a. |
| ESD Rating | ±30 kV (air/contact per IEC61000-4-2) - Enables direct interface with exposed connectors without external ESD staging. |
| Junction Temp | −55 °C to +175 °C - Supports under-hood automotive environments and industrial high-temp PCB placements. |
| Package | DO-219AA - Surface-mount, low-profile (0.81–1.20 mm height), 2.70–2.90 mm body width; compatible with automated SMT assembly. |
Pinout & Package
SMF4L6.0AQ is housed in a two-terminal DO-219AA surface-mount package. The cathode is marked by a band on the top surface; the anode is the unmarked terminal. This compact, lead-free, halogen-free "Green" package meets J-STD-020 moisture sensitivity level 1 and UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line (e.g., battery+); conducts surge current to ground during overvoltage event. |
| Anode (unbanded end) | Reference node | Typically tied to system ground; establishes reference for clamping action and defines unidirectional polarity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD stress per AEC standard. |
| Low clamping ratio (VC/VRWM) | 1.72 - Minimizes voltage overshoot during surge, reducing risk of IC latch-up or gate oxide damage. |
| Fast response time | <1.0 ns - Ensures suppression initiates before nanosecond-scale ESD pulses propagate into IC inputs. |
| IATF 16949 manufacturing | Produced in certified facilities with PPAP documentation support for Tier-1 automotive programs. |
| Halogen- and antimony-free | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - Meets global environmental compliance mandates (RoHS 3, JEDEC JS709). |
Applications
| Battery Management System (BMS) Input Protection | Automotive Body Control Module (BCM) Power Rail |
|---|---|
Use Scenario: Protects BMS front-end from jump-start surges and alternator load dump transients on 12 V battery input. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery+ and system ground to clamp transients before they reach monitoring ICs and MOSFET drivers. Use Value: Limits clamped voltage to 10.3 V, ensuring downstream analog front-ends and microcontrollers remain within absolute maximum ratings. |
Use Scenario: Shields BCM microcontroller power domain from ignition noise and relay-switching spikes on fused 12 V supply. IC Role / Device Role / Timing Role: Primary DC rail protector located at PCB entry point, upstream of bulk capacitance and LDO regulators. Use Value: Withstands 400 W pulses and ±30 kV ESD, eliminating need for secondary protection stages in cost-sensitive modules. |
| Industrial Sensor Node Power Interface | USB-C Power Delivery (PD) Port Protection |
Use Scenario: Secures 24 V fieldbus-powered sensor nodes against induced lightning surges and cable coupling transients. IC Role / Device Role / Timing Role: First-line transient suppressor on main DC input, paired with common-mode choke and local decoupling. Use Value: DO-219AA footprint allows placement directly at connector, minimizing trace inductance and preserving clamping speed. |
Use Scenario: Protects USB-C PD controller VBUS line from hot-plug ESD and accidental 20 V overvoltage events. IC Role / Device Role / Timing Role: Unidirectional clamp between VBUS and GND, sized to handle 10.3 A surge while maintaining <10.3 V clamping. Use Value: Complies with USB PD 3.1 ESD immunity requirements and avoids false overvoltage shutdowns due to tight VC tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.0A | DO-214AC package; higher RθJA (110 °C/W); 10.5 V VC @ 10.3 A | Larger footprint; less suitable for ultra-thin automotive modules | Preferred where legacy board space allows larger package and thermal derating is acceptable. |
| TPSMD6.0 | DO-214AB package; 400 W rating; 10.5 V VC @ 10.3 A; no AEC-Q101 certification | Not qualified for automotive; limited to industrial/commercial use | Select only for non-automotive designs requiring lower cost and no PPAP support. |
Compared with SMAJ6.0A and TPSMD6.0, SMF4L6.0AQ delivers superior thermal performance (RθJA = 96 °C/W), AEC-Q101 qualification, and tighter clamping (10.3 V vs. 10.5 V), making it optimal for space-constrained, safety-critical automotive power interfaces.
Availability
SMF4L6.0AQ is available at Aetrix Electronics and suitable for automotive battery management, industrial sensor nodes, and USB-C PD port protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SMF4L6.0AQ 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 SMF4L series belongs to Diodes' AEC-Q101-qualified TVS portfolio, engineered specifically for automotive-grade transient suppression in power distribution networks and signal interfaces.
FAQ
What is the polarity configuration of SMF4L6.0AQ?
SMF4L6.0AQ is a unidirectional TVS diode, indicated by a cathode band on the DO-219AA package. It conducts only when reverse-biased beyond its breakdown voltage, making it suitable for DC power rail protection where polarity is fixed. Its forward voltage is 3.0 V at 16 A, but it is not intended for forward conduction in normal operation.
Does SMF4L6.0AQ meet automotive qualification standards?
Yes - SMF4L6.0AQ is AEC-Q101 qualified, manufactured in IATF 16949-certified facilities, and PPAP-capable. It undergoes stress testing for high-temperature reverse bias, temperature cycling, and ESD per AEC requirements, supporting deployment in engine control units, body electronics, and ADAS power domains.
How does SMF4L6.0AQ perform under repeated surge conditions?
SMF4L6.0AQ is rated for non-repetitive 10/1000 µs surges per Figure 4 in DS43393. While it handles single-event transients robustly, repetitive surges require derating per the pulse derating curve (Figure 1). At +85°C ambient, its peak pulse power drops to ~280 W, and thermal design must ensure junction temperature stays below +175°C.
Can SMF4L6.0AQ replace older SMAJ6.0A in existing designs?
Direct replacement is possible electrically (same VRWM, VBR, and VC), but mechanical layout requires verification: DO-219AA (SMF4L6.0AQ) is smaller and lower-profile than DO-214AC (SMAJ6.0A). Pad dimensions, solder mask clearance, and thermal relief must be updated per Diodes' recommended layout for DO-219AA to maintain reliability and thermal performance.
SMF4L6.0AQ-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):
- 6V
- Voltage - Breakdown (Min):
- 6.67V
- Voltage - Clamping (Max) @ Ipp:
- 10.3V
- Current - Peak Pulse (10/1000µs):
- 38.3A
- 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
SMF4L6.0AQ-7 FAQ
1.How can I place an order for SMF4L6.0AQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L6.0AQ-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 SMF4L6.0AQ-7 reliable?
The price and inventory of SMF4L6.0AQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L6.0AQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L6.0AQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L6.0AQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L6.0AQ-7?
SMF4L6.0AQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L6.0AQ-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 SMF4L6.0AQ-7?
For technical support, including SMF4L6.0AQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L6.0AQ-7 requirements.
6.How does Aetrix verify that SMF4L6.0AQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L6.0AQ-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 SMF4L6.0AQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L6.0AQ-7?
All SMF4L6.0AQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L6.0AQ-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 SMF4L6.0AQ-7 part is unused and in its original packaging.
Return procedure for SMF4L6.0AQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L6.0AQ-7 Tags
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Diodes Incorporated
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Diodes Incorporated
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