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Diodes Incorporated SMF4L36CAQ-7
- Part No.:
- SMF4L36CAQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L36CAQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:6,340
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Product details
Overview
SMF4L36CAQ-7 from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in DO-219AA package, rated for 400W peak pulse power (10/1000µs), 36V working peak reverse voltage (VRWM), 44.2V minimum breakdown voltage (VBR), and 58.1V maximum clamping voltage (VC) at 6.9A surge current. It delivers ±30kV ESD protection per IEC61000-4-2 and is AEC-Q101 qualified for automotive battery contact and power line protection.
For engineers reviewing the SMF4L36CAQ-7 datasheet, SMF4L36CAQ-7 pinout, SMF4L36CAQ-7 application, or SMF4L36CAQ-7 equivalent, this device is selected for robust overvoltage suppression in space-constrained automotive and industrial power rails where fast response (<5.0ns), low leakage (<0.5µA), and high surge capability are critical design requirements.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with clamping initiated when reverse voltage exceeds 44.2V (min) and limited to ≤58.1V at 6.9A. Its junction capacitance is not specified in the datasheet but is optimized for low-speed power-line transients rather than high-frequency signal lines.
Designed for IATF 16949-certified production, it supports PPAP documentation and features halogen- and antimony-free "Green" molding compound (UL 94V-0), matte tin terminals, and moisture sensitivity level 1 - enabling direct reflow without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W (10/1000µs waveform): sustains single high-energy surges without failure |
| Working Peak Reverse Voltage | 36V: maximum continuous DC or RMS voltage before clamping activates |
| Breakdown Voltage (Min) | 44.2V @ 1mA: guaranteed conduction onset under standardized test conditions |
| Clamping Voltage (Max) | 58.1V @ 6.9A: upper limit of protected line voltage during worst-case surge |
| ESD Rating | ±30kV air/contact per IEC61000-4-2: meets automotive-level electrostatic immunity |
| Leakage Current | ≤0.5µA @ 36V: minimal standby power loss and signal integrity impact |
| AEC-Q101 Qualified | Yes: validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: DO-219AA surface-mount plastic case (1.90mm × 2.80mm × 0.60mm), cathode band omitted to indicate bi-directional polarity. Terminals are matte tin-plated copper alloy, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional current path | No polarity marking required; identical clamping behavior in either direction |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse rating | Enables protection against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges on 12V/24V systems |
| Fast response time | <5.0ns turn-on (bi-directional): limits voltage overshoot before downstream ICs are damaged |
| AEC-Q101 qualification | Validated for automotive underhood environments (−40°C to +175°C TJ) |
| RoHS 3 & "Green" compliant | Halogen-free (<1500ppm Br+Cl), antimony-free (<1000ppm), lead-free finish |
Applications
| Automotive Battery Protection | Industrial Power Supply Input |
|---|---|
Use Scenario: Direct connection across 12V/24V vehicle battery terminals to suppress load dump and jump-start transients. IC Role / Device Role / Timing Role: Bi-directional clamping element placed upstream of DC-DC converters and microcontrollers. Use Value: Limits voltage to ≤58.1V during 6.9A surges, preventing damage to 36V-rated input stages while maintaining <0.5µA leakage at nominal voltage. | Use Scenario: Protection of AC-DC or DC-DC converter inputs in factory automation controllers exposed to inductive switching noise. IC Role / Device Role / Timing Role: Primary overvoltage clamp on unregulated DC bus rails prior to filtering and regulation. Use Value: Withstands repetitive 400W pulses without degradation, ensuring long-term reliability in harsh industrial environments with frequent motor switching. |
| USB-C Power Delivery Interface | Telecom Base Station Power Rail |
Use Scenario: Surge suppression on VBUS line of USB-C receptacles handling up to 20V/5A PD profiles. IC Role / Device Role / Timing Role: Secondary protection layer after primary common-mode chokes and before USB PD controller ICs. Use Value: Clamps 36V-rated VBUS to ≤58.1V within 5ns, preserving PD negotiation integrity and preventing controller latch-up during ESD events. | Use Scenario: Front-end protection of 48V telecom power distribution boards subjected to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage TVS on -48V DC input before hot-swap controllers and POL modules. Use Value: Delivers 400W pulse handling with 36V standoff, matching standard telecom power rail margins and supporting IEC 61000-4-5 compliance testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA | DO-214AC package; 400W rating; higher clamping voltage (63.6V @ 6.4A); larger footprint (4.3×2.6mm) | Less suitable for ultra-compact layouts; lower thermal resistance to PCB but higher parasitic inductance | Select when board space allows and legacy SMA footprint compatibility is required |
| TPSMD36C | DO-214AB package; 400W rating; tighter VBR tolerance (40–44.2V); same clamping (58.1V @ 6.9A) | Higher cost; slightly longer lead time; identical electrical performance in compact form factor | Prefer when tighter breakdown consistency is needed for margin-critical designs |
Compared with SMAJ36CA and TPSMD36C, SMF4L36CAQ-7 offers the smallest footprint (DO-219AA), lowest profile (0.6mm height), and best fit for high-density automotive modules where PCB real estate and Z-height are constrained.
Availability
SMF4L36CAQ-7 is available at Aetrix Electronics and suitable for automotive battery management, industrial power supply input protection, and USB-C power delivery interface designs requiring stable component supply and AEC-Q101 compliance.
Supply support for SMF4L36CAQ-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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with manufacturing certified to IATF 16949 and quality systems aligned with AEC-Q200 and AEC-Q101 standards.
The SMF4L series belongs to Diodes' automotive-grade TVS portfolio, engineered specifically for transient suppression in 12V/24V/48V power networks where space, reliability, and regulatory compliance are non-negotiable.
FAQ
What does the 'C' in SMF4L36CAQ-7 signify?
The 'C' denotes bi-directional configuration, meaning the device provides symmetrical clamping for both positive and negative transients without polarity dependence. This distinguishes it from uni-directional variants like SMF4L36AQ, which include a cathode band and clamp only in reverse bias.
Is SMF4L36CAQ-7 suitable for protecting CAN bus lines?
No - SMF4L36CAQ-7 is not designed for CAN bus protection. Its 36V VRWM and 58.1V clamping voltage exceed typical CAN transceiver operating ranges (±40V common-mode). Dedicated low-capacitance CAN TVS devices such as DZ23C36 or NUP4105 are recommended instead.
How does the DO-219AA package improve thermal performance versus SMA (DO-214AC)?
DO-219AA offers lower thermal resistance to the PCB (RθJA = 96°C/W vs. ~110°C/W for SMA) due to its flat anode/cathode terminals and optimized copper leadframe geometry. This enables more efficient heat dissipation during repeated surge events without requiring additional thermal vias.
Does SMF4L36CAQ-7 require derating at elevated ambient temperatures?
Yes - peak pulse power must be derated linearly above +25°C per Figure 1 in DS43393. At +85°C ambient, maximum allowable PPK drops to ~280W (70% of 400W), and at +125°C, it falls to ~160W (40%), ensuring safe operation within junction temperature limits.
SMF4L36CAQ-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:
- -
- Bidirectional Channels:
- 1
- 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
SMF4L36CAQ-7 FAQ
1.How can I place an order for SMF4L36CAQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L36CAQ-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 SMF4L36CAQ-7 reliable?
The price and inventory of SMF4L36CAQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L36CAQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L36CAQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L36CAQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L36CAQ-7?
SMF4L36CAQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L36CAQ-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 SMF4L36CAQ-7?
For technical support, including SMF4L36CAQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L36CAQ-7 requirements.
6.How does Aetrix verify that SMF4L36CAQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L36CAQ-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 SMF4L36CAQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L36CAQ-7?
All SMF4L36CAQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L36CAQ-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 SMF4L36CAQ-7 part is unused and in its original packaging.
Return procedure for SMF4L36CAQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L36CAQ-7 Tags
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ESD9B5.0ST5G
onsemi
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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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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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