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Diodes Incorporated SMF4L36AQ-7
- Part No.:
- SMF4L36AQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L36AQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:8,580
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Product details
Overview
SMF4L36AQ-7 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with 36V working peak reverse voltage, 40V–44.2V breakdown range, and 58.1V maximum clamping voltage at 6.9A surge current. It delivers ±30kV ESD protection per IEC61000-4-2 and is AEC-Q101 qualified for automotive power line and battery contact protection.
For engineers reviewing the SMF4L36AQ-7 datasheet, SMF4L36AQ-7 pinout, SMF4L36AQ-7 application, or SMF4L36AQ-7 equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, unidirectional polarity alignment with DC rail topology, DO-219AA footprint compatibility, and AEC-Q101 compliance for under-hood electronics.
Technical Context
This TVS operates as a fast-acting shunt clamp on DC power rails, activating when transient voltage exceeds its 40–44.2V breakdown threshold to divert surge current away from downstream circuitry. Its sub-1ns response time ensures protection against ESD and fast transients before sensitive components experience overstress.
Designed for automotive-grade reliability, it features a DO-219AA package with matte tin terminals, 175°C max junction temperature, and full IATF 16949 manufacturing control. The device sustains 400W peak pulse power (10/1000µs waveform) while maintaining low leakage (<0.5µA at 36V) and stable thermal resistance (RθJA = 96°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage (VRWM) | 36 V - Maximum continuous DC or RMS voltage the device blocks without clamping. |
| Breakdown Voltage (VBR) | 40–44.2 V @ 1 mA - Voltage range at which device transitions from high-impedance to low-impedance conduction. |
| Maximum Clamping Voltage (VC) | 58.1 V @ 6.9 A - Peak voltage seen across protected circuit during worst-case 10/1000µs surge. |
| Peak Pulse Power (PPK) | 400 W - Sustained energy dissipation capability for standardized 10/1000µs transient waveform. |
| ESD Withstand (IEC61000-4-2) | ±30 kV air / ±30 kV contact - Confirmed immunity level for system-level ESD robustness validation. |
| Junction Temperature Range | −55°C to +175°C - Enables deployment in engine bay, battery management, and other high-thermal-stress automotive zones. |
| Leakage Current (IR) | <0.5 µA @ 36 V - Negligible standby power loss and minimal impact on low-power sensor rail stability. |
Pinout & Package
Package: DO-219AA - ultra-compact surface-mount plastic case (2.80 mm × 1.90 mm × 0.60 mm), halogen-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes clamping loop during overvoltage event. |
| Cathode (marked by band) | High-side connection point | Connected to protected line (e.g., 12V battery rail); defines unidirectional conduction direction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use with PPAP support and IATF 16949 manufacturing traceability. |
| Fast response time | <1.0 ns turn-on enables suppression of nanosecond-scale ESD events before IC damage occurs. |
| Green packaging | Halogen- and antimony-free molding compound (Br+Cl <1500 ppm, Sb <1000 ppm) meets global environmental mandates. |
| Stable clamping performance | 58.1 V VC at 6.9 A ensures predictable overvoltage limiting across temperature and lifetime. |
| DO-219AA footprint | Enables high-density PCB layout with 0.85–1.15 mm lead width and 2.70–2.90 mm body width. |
Applications
| Automotive Power Distribution | Battery Management Systems |
|---|---|
Use Scenario: Protection of 12V/24V supply lines feeding ECUs, lighting modules, and infotainment systems against load dump and jump-start transients. IC Role / Device Role / Timing Role: Shunt TVS placed upstream of LDOs or DC-DC converters to clamp surges before regulation stage. Use Value: 58.1 V clamping ensures safe margin below typical 60 V automotive IC absolute maximum ratings. | Use Scenario: Safeguarding BMS analog front-end inputs and communication lines connected to Li-ion battery packs. IC Role / Device Role / Timing Role: Unidirectional clamp on cell voltage monitoring paths and CAN bus power rails. Use Value: ±30 kV ESD rating prevents latch-up or gate oxide damage during handling and field operation. |
| Industrial Control Inputs | Telematics Module Power Rails |
Use Scenario: Protecting PLC digital input channels exposed to inductive switching noise and field wiring transients. IC Role / Device Role / Timing Role: Rail-to-rail TVS on 24V sensor supply lines interfacing with optocouplers or isolated ADCs. Use Value: 400W pulse rating handles repetitive 10/1000µs surges common in factory automation environments. | Use Scenario: Securing LTE/GNSS module power inputs subjected to vehicle ignition noise and antenna coupling. IC Role / Device Role / Timing Role: First-line defense on VIN pins of PMICs powering cellular modems and GNSS receivers. Use Value: −55°C to +175°C operating range supports reliable function in sealed, thermally constrained telematics enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A | Higher clamping voltage (60.0 V @ 6.5 A), SMA package (larger footprint, higher RθJA = 125°C/W) | Less suitable for space-constrained automotive modules requiring DO-219AA density | Select if legacy SMA layout exists and thermal derating margin allows. |
| TPSMD36 | Same DO-219AB package but lower PPK (300 W), slightly higher VC (59.0 V @ 5.1 A) | Not rated for AEC-Q101; limited to industrial/commercial automotive subsystems | Choose only where automotive qualification is not required and cost is prioritized over surge margin. |
Compared with SMAJ36A and TPSMD36, SMF4L36AQ-7 offers superior power density (400W in DO-219AA), tighter clamping (58.1 V), and full AEC-Q101 compliance-making it optimal for next-generation compact, safety-critical automotive power nodes.
Availability
SMF4L36AQ-7 is available at Aetrix Electronics and suitable for automotive power distribution, battery management systems, industrial control inputs, and telematics module power rails requiring stable component supply across long production lifecycles.
Supply support for SMF4L36AQ-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' AEC-Q101-qualified TVS portfolio, engineered specifically for robust transient suppression in harsh automotive environments-including battery contacts, power distribution networks, and ECU input/output interfaces.
FAQ
What is the polarity configuration of SMF4L36AQ-7?
SMF4L36AQ-7 is a unidirectional TVS diode, indicated by the cathode band marking on the DO-219AA package. It conducts only when the cathode is positive relative to the anode, making it suitable for DC power rail protection where polarity is fixed and reverse-voltage blocking is required.
How does SMF4L36AQ-7 perform under elevated ambient temperatures?
At +125°C ambient, its peak pulse power rating drops to approximately 240W (60% of 400W) per the derating curve in DS43393. Its 175°C max junction temperature and 96°C/W thermal resistance ensure continued functionality in under-hood applications when mounted on standard 2 oz. copper PCB pads.
Is SMF4L36AQ-7 compatible with lead-free reflow soldering processes?
Yes-SMF4L36AQ-7 features matte tin-finished copper alloy leads and is qualified for standard Pb-free reflow profiles (JEDEC J-STD-020, peak 260°C). Its DO-219AA package has moisture sensitivity level 1, eliminating bake requirements prior to assembly.
Can SMF4L36AQ-7 be used in bi-directional signal line protection?
No-SMF4L36AQ-7 is unidirectional and lacks symmetrical clamping behavior. For bi-directional data lines (e.g., CAN, LIN), the bi-directional variant SMF4L36CAQ-7 must be used, which clamps equally for both polarities and has no cathode band marking.
SMF4L36AQ-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):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 6.9A
- 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
SMF4L36AQ-7 FAQ
1.How can I place an order for SMF4L36AQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L36AQ-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 SMF4L36AQ-7 reliable?
The price and inventory of SMF4L36AQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L36AQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L36AQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L36AQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L36AQ-7?
SMF4L36AQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L36AQ-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 SMF4L36AQ-7?
For technical support, including SMF4L36AQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L36AQ-7 requirements.
6.How does Aetrix verify that SMF4L36AQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L36AQ-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 SMF4L36AQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L36AQ-7?
All SMF4L36AQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L36AQ-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 SMF4L36AQ-7 part is unused and in its original packaging.
Return procedure for SMF4L36AQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L36AQ-7 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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