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Diodes Incorporated SMF4L54CAQ-7
- Part No.:
- SMF4L54CAQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L54CAQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:8,469
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Product details
Overview
SMF4L54CAQ-7 from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in DO-219AA package, designed for automotive-grade ESD and surge protection. It features a 54 V working peak reverse voltage (VRWM), 60–66.3 V breakdown voltage (VBR), 87.1 V maximum clamping voltage (VC) at 4.6 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 and power management circuits.
For engineers reviewing the SMF4L54CAQ-7 datasheet, SMF4L54CAQ-7 pinout, SMF4L54CAQ-7 application, or SMF4L54CAQ-7 equivalent, key selection criteria include clamping performance under IEC 61000-4-2 ±30 kV ESD stress, bi-directional standoff capability, thermal resistance (RθJA = 96 °C/W), and compatibility with high-reliability automotive PCB layouts requiring IATF 16949 traceability.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling robust protection of differential or AC-coupled signal lines and ungrounded power rails. Its sub-5 ns response time ensures suppression before sensitive downstream circuitry sustains damage during fast transients like ISO 7637-2 pulse 1/2a/3a or ESD events.
The device leverages silicon avalanche structure optimized for low dynamic impedance and stable clamping over its full rated surge current range (up to 4.6 A). Its DO-219AA package provides low thermal resistance (RθJC = 18 °C/W) and meets J-STD-020 moisture sensitivity level 1, supporting lead-free reflow without popcorn risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 54 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected line voltage. |
| VBR (min/max) | 60–66.3 V - Breakdown occurs within this band at 1 mA test current; defines onset of clamping action. |
| VC @ IRSM | 87.1 V - Clamps to ≤87.1 V at 4.6 A peak surge current; determines worst-case voltage seen by protected IC. |
| PPK | 400 W - Peak pulse power handling per 10/1000 µs waveform; enables survivability against automotive load dump surges. |
| ESD Rating | ±30 kV air / ±30 kV contact (IEC 61000-4-2) - Full immunity to handheld 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. |
Pinout & Package
Package: DO-219AA - surface-mount, flat-lead, bi-directional configuration with no cathode band marking; 2.80 mm body width, 3.80 mm height, 1.90 mm length; RoHS-compliant matte tin finish over copper alloy leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; conducts during negative transients relative to cathode reference. |
| Cathode | Transient current entry (positive polarity) | Second terminal of symmetrical junction; conducts during positive transients; forms bidirectional conduction path. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood and cabin applications including temperature cycling, HTRB, and ESD stress. |
| IATF 16949 manufacturing | Produced in certified facilities with PPAP documentation support and change control for Tier 1 OEM programs. |
| Bi-directional clamping | Protects AC signals or floating rails without polarity dependency; eliminates need for dual-device placement. |
| Green compound (94V-0) | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb); supports EU environmental compliance. |
Applications
| Automotive Battery Interface | USB Type-C Port Protection |
|---|---|
Use Scenario: Protecting 12 V battery feed lines in infotainment head units against load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point to shunt surge energy before DC-DC converters. Use Value: Withstands 400 W pulses and clamps to ≤87.1 V, preventing overvoltage damage to 36 V-rated input stages of PMICs and microcontrollers. |
Use Scenario: Safeguarding USB Type-C CC and VBUS lines against ESD and hot-plug surges in automotive docking stations. IC Role / Device Role / Timing Role: Bi-directional TVS placed adjacent to connector to clamp both positive and negative transients on differential and power lines. Use Value: Sub-5 ns response and ±30 kV ESD rating ensure compliance with USB-IF and IEC 61000-4-2 requirements without signal integrity impact. |
| Industrial CAN Bus Nodes | Smart Meter Power Input |
Use Scenario: Shielding CAN_H/CAN_L differential pair from EFT and lightning-induced surges in factory automation gateways. IC Role / Device Role / Timing Role: Paired bi-directional TVS devices on each line referenced to ground, providing symmetrical common-mode surge suppression. Use Value: Low clamping voltage (87.1 V) and matched VBR ensure balanced protection without skewing differential signaling thresholds. |
Use Scenario: Securing 220 VAC-derived DC input rails in utility smart meters exposed to grid switching transients and lightning coupling. IC Role / Device Role / Timing Role: Secondary-level TVS after MOV and fuse, absorbing residual fast-rising spikes that bypass bulk protection. Use Value: 400 W peak power rating and 96 °C/W thermal resistance enable reliable operation in sealed, thermally constrained meter enclosures. |
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 |
|---|---|---|---|
| SMAJ54CA | DO-214AC package; higher RθJA (125 °C/W); same VRWM/VBR/VC specs. | Larger footprint; less suitable for dense automotive PCBs where DO-219AA's 2.8 mm width saves space. | Prefer SMF4L54CAQ-7 when board area is constrained and thermal performance must be maximized. |
| TPSMD54C | DO-214AB package; 600 W PPK rating; slightly higher VC (89.5 V at 4.6 A). | Higher surge capacity but larger height (2.6 mm vs. 3.8 mm) and non-AEC-Q101 qualified. | Choose SMF4L54CAQ-7 for AEC-Q101 compliance and IATF 16949 traceability in automotive production. |
Compared with SMAJ54CA and TPSMD54C, SMF4L54CAQ-7 delivers superior thermal performance in a smaller footprint and is uniquely qualified for automotive use with full PPAP support-making it optimal for space-constrained, safety-critical vehicle subsystems.
Availability
SMF4L54CAQ-7 is available at Aetrix Electronics and suitable for automotive battery interfaces, USB Type-C port protection, industrial CAN bus nodes, and smart meter power inputs requiring stable component supply and long-term lifecycle assurance.
Supply support for SMF4L54CAQ-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 computing markets.
The SMF4L series belongs to Diodes' AEC-Q101-qualified TVS portfolio, engineered specifically for automotive transient suppression where compact size, precise clamping, and process-controlled reliability are mandatory.
FAQ
What is the polarity configuration of SMF4L54CAQ-7?
SMF4L54CAQ-7 is a bi-directional TVS diode with no cathode band marking, enabling symmetrical clamping for both positive and negative transients. Its DO-219AA package uses identical terminals for anode and cathode functions, eliminating polarity concerns during placement on AC or floating lines.
Does SMF4L54CAQ-7 meet automotive qualification standards?
Yes, SMF4L54CAQ-7 is AEC-Q101 qualified, manufactured in IATF 16949-certified facilities, and PPAP-capable. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD verification per ISO 10605, making it suitable for under-hood and cabin applications.
How does the DO-219AA package improve thermal performance over DO-214AC?
The DO-219AA package achieves RθJA = 96 °C/W versus ~125 °C/W for DO-214AC due to its shorter thermal path and optimized copper leadframe geometry. This allows 18% higher steady-state power dissipation (1.0 W) and better pulse-to-pulse recovery in high-frequency surge environments.
Can SMF4L54CAQ-7 replace SMF54CA in existing designs?
No-SMF54CA uses DO-214AA packaging and lacks AEC-Q101 qualification, IATF 16949 traceability, and the enhanced ESD rating (±30 kV) of SMF4L54CAQ-7. While electrical specs overlap, the "L" suffix denotes automotive-grade construction, material controls, and test rigor not present in legacy SMF54CA.
SMF4L54CAQ-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):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 4.6A
- 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
SMF4L54CAQ-7 FAQ
1.How can I place an order for SMF4L54CAQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L54CAQ-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 SMF4L54CAQ-7 reliable?
The price and inventory of SMF4L54CAQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L54CAQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L54CAQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L54CAQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L54CAQ-7?
SMF4L54CAQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L54CAQ-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 SMF4L54CAQ-7?
For technical support, including SMF4L54CAQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L54CAQ-7 requirements.
6.How does Aetrix verify that SMF4L54CAQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L54CAQ-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 SMF4L54CAQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L54CAQ-7?
All SMF4L54CAQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L54CAQ-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 SMF4L54CAQ-7 part is unused and in its original packaging.
Return procedure for SMF4L54CAQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L54CAQ-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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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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