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Bourns Inc. SMF4L5.0A-Q
- Part No.:
- SMF4L5.0A-Q
- Manufacturer:
- Bourns Inc.
- Category:
- TVS Diodes
- Package:
- SOD-123F
- Datasheet:
-
SMF4L5.0A-Q.pdf
- Description:
- DIODE TVS 400W UNI SMF
- Quantity:
- Payment:
- Shipping:
Inventory:7,308
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Product details
Overview
SMF4L5.0A-Q from Bourns Inc. is an automotive-grade unidirectional TVS diode designed for ESD, EFT, and surge protection on low-voltage power and signal lines. The device provides 5.0V reverse standoff voltage, 400W peak pulse power capability, low leakage current, and a compact low-profile SOD-123FL package suitable for high-density automotive and industrial PCB designs.
As part of the Bourns SMF4L-Q transient voltage suppressor diode series, SMF4L5.0A-Q combines AEC-Q101 qualification, RoHS compliance, halogen-free construction, low-profile packaging, and transient clamping performance for sensitive electronic circuits. For engineers reviewing the SMF4L5.0A-Q datasheet, SMF4L5.0A-Q pinout, SMF4L5.0A-Q application, or SMF4L5.0A-Q equivalent, this device is widely used in automotive electronics, power supply protection, communication interfaces, industrial control boards, portable devices, and low-voltage transient suppression circuits.
Technical Context
In protection circuits, SMF4L5.0A-Q operates as a unidirectional transient voltage suppressor diode connected across the protected line and ground or across a protected power rail. Under normal operating voltage, the device remains in a high-impedance state. During an ESD, EFT, load dump-related transient, or surge event within its rating, the diode avalanches and clamps the voltage to help protect downstream ICs and circuit nodes.
The 5.0V reverse standoff voltage makes the device suitable for 5V-class rails and low-voltage signal paths where transient protection is required without excessive leakage during normal operation. Its 400W peak pulse power rating supports surge events defined by the datasheet waveform conditions, while the low-profile SOD-123FL package helps reduce board area compared with larger SMA or SMB TVS packages.
SMF4L5.0A-Q is commonly placed close to connectors, supply entry points, interface lines, sensor power rails, and exposed board-level nodes. For best performance, the transient current path should be short and low inductance, with a solid return path to ground or the protected rail reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Device Type | Unidirectional transient voltage suppressor diode for low-voltage line protection. |
| Automotive Qualification | AEC-Q101 qualified for automotive electronic applications. |
| Reverse Standoff Voltage | 5.0V VRWM, suitable for 5V-class rails and low-voltage protected nodes. |
| Breakdown Voltage | Minimum 6.4V and maximum 7.25V at the specified test current, defining the avalanche transition region. |
| Peak Pulse Power | 400W maximum peak pulse power under the datasheet pulse waveform condition. |
| Peak Pulse Current | 43.5A maximum peak pulse current for the specified surge waveform condition. |
| Maximum Clamping Voltage | 9.2V maximum at IPP, limiting transient voltage seen by downstream circuitry. |
| Reverse Leakage Current | Low leakage at VRWM, helping reduce standby loading on protected 5V rails. |
| Polarity | Unidirectional configuration for protection of positive-voltage rails and signal lines. |
| Package | SOD-123FL low-profile surface-mount package for compact PCB layouts. |
| Environmental Compliance | RoHS compliant and halogen-free construction for modern production requirements. |
| Typical Protection Use | ESD, EFT, and surge protection for automotive, industrial, and communication circuits. |
Pinout & Package
The SMF4L5.0A-Q pinout uses a two-terminal SOD-123FL package. As a unidirectional TVS diode, the cathode is normally connected to the protected positive line and the anode is connected to ground or the lower-potential reference node. This orientation allows the diode to remain reverse-biased during normal operation and clamp positive transient events.
For PCB implementation, the device should be located close to the transient entry point, such as a connector, supply input, or exposed trace. Short routing, wide copper paths, low-inductance vias, and a solid ground return help reduce residual clamping voltage caused by PCB parasitic inductance.
| Pin / Function | PCB Design and Circuit Role |
|---|---|
| Cathode | Connects to the protected positive line or 5V rail in unidirectional protection layouts. |
| Anode | Connects to ground or the lower-potential reference path for transient current return. |
| Protected Line | Route through the TVS protection point before the sensitive IC or circuit node. |
| SOD-123FL Package | Low-profile surface-mount package supporting compact protection placement and automated assembly. |
Key Features
- Unidirectional TVS diode for low-voltage transient suppression.
- 5.0V reverse standoff voltage for 5V-class protection applications.
- 400W peak pulse power capability for surge suppression.
- Low-profile SOD-123FL package saves PCB area and height.
- AEC-Q101 qualified for automotive electronics requirements.
- Low leakage current supports standby-sensitive protected rails.
- Fast avalanche response helps clamp ESD and surge transients.
- RoHS compliant and halogen-free construction supports modern manufacturing requirements.
- Suitable for power rails, signal lines, connectors, and interface protection circuits.
Applications
| Automotive Electronics | Power Supply Protection |
|---|---|
|
Use Scenario: Automotive control modules, sensor interfaces, body electronics, and exposed low-voltage lines. Device Role: SMF4L5.0A-Q clamps transient voltage events before they reach sensitive ICs. Use Value: Supports automotive-grade protection in compact PCB designs. |
Use Scenario: 5V rails, local regulators, distributed supply lines, and board-level power inputs. Device Role: Provides avalanche clamping for surge and EFT events on low-voltage supply nodes. Use Value: Helps protect downstream regulators, MCUs, sensors, and interface components. |
| Communication & Interface Lines | Industrial Control Boards |
|
Use Scenario: Connector-side signal paths, low-speed interfaces, peripheral lines, and control signals. Device Role: Suppresses ESD and transient events introduced through cables or user-accessible ports. Use Value: Improves robustness of exposed low-voltage interface circuits. |
Use Scenario: PLC modules, instrumentation boards, sensor nodes, automation equipment, and embedded control systems. Device Role: Provides compact transient suppression for power and signal nodes exposed to electrical stress. Use Value: Reduces transient-related failures and supports repeatable production protection design. |
Equivalent & Alternatives
When evaluating SMF4L5.0A-Q equivalent devices, engineers should compare reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse power, peak pulse current, leakage current, polarity, package footprint, automotive qualification, and surge waveform rating.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF4L5.0A | Similar Bourns SMF4L 5V TVS option without the automotive "-Q" suffix qualification positioning. | Used in general-purpose low-voltage transient protection applications. | Choose SMF4L5.0A-Q when AEC-Q101 automotive qualification is required. |
| PESD5V0S1BA | Nexperia 5V ESD protection device with different surge-power rating, package, and capacitance behavior. | Used in compact low-voltage signal-line ESD protection circuits. | Choose SMF4L5.0A-Q when higher 400W-class TVS surge capability and SOD-123FL footprint are required. |
| SMF5.0A | 5V unidirectional TVS diode in a related compact package class with different vendor specifications and qualification details. | Used in general 5V rail and signal-line transient protection designs. | Choose SMF4L5.0A-Q when the design requires Bourns SMF4L-Q automotive-grade qualification and datasheet clamping behavior. |
| SMAJ5.0A | Larger package TVS diode with different footprint, power rating, and board-area requirements. | Used when larger surge capability or larger package thermal mass is acceptable. | Choose SMF4L5.0A-Q when a low-profile compact package is preferred for space-constrained layouts. |
Compared with SMF4L5.0A, SMF4L5.0A-Q is optimized for automotive-grade applications requiring AEC-Q101 qualification while maintaining the same 5V-class SMF4L transient protection role. SMF4L5.0A-Q vs SMAJ5.0A selection depends on package size, surge-power requirement, automotive qualification, clamping-voltage target, PCB area, and sourcing continuity requirements.
Quality
SMF4L5.0A-Q should be sourced as original Bourns Inc. components through traceable and controlled supply channels. Quality verification procedures may include package inspection, marking validation, solderability testing, breakdown-voltage verification, leakage-current testing, clamping-performance review, polarity confirmation, and incoming inspection according to automotive and industrial protection-device production requirements.
Because the device is used for transient suppression, system reliability depends on correct TVS polarity, connector-side placement, low-inductance routing, adequate copper area, proper ground return, surge energy margin, and verification against the relevant ESD/EFT/surge test environment. Traceable sourcing supports manufacturing quality and reduces counterfeit supply-chain risk for automotive-grade protection designs.
Availability
SMF4L5.0A-Q available at Aetrix Electronics and suitable for automotive electronics, 5V power rail protection, communication interfaces, industrial control boards, connector-side protection, portable devices, and low-voltage transient suppression applications requiring stable component supply and repeatable production support.
Supply support may include scheduled delivery planning, volume procurement support, BOM continuity assistance, traceable sourcing management, and long-term availability support for automotive module manufacturers, industrial-control developers, interface-board designers, and electronics production programs.
For production deployment, confirming reverse standoff voltage, clamping voltage, surge rating, package footprint, polarity, automotive qualification, and sourcing continuity helps reduce procurement risk and improve manufacturing stability.
Manufacturer
Bourns Inc. is an electronic components manufacturer specializing in circuit protection devices, resistive products, magnetic components, sensors, trimming potentiometers, encoders, power components, and automotive-grade electronic solutions for industrial, automotive, communication, consumer, and power applications.
The Bourns TVS diode portfolio focuses on ESD, EFT, surge, and transient protection, compact package integration, automotive qualification options, RoHS and halogen-free compliance, and reliable clamping behavior for power rails, communication interfaces, sensor lines, and exposed electronic circuits.
FAQ
What is SMF4L5.0A-Q used for?
SMF4L5.0A-Q is used for transient voltage suppression on 5V-class power rails, signal lines, connector interfaces, automotive modules, industrial boards, and low-voltage electronic circuits.
Where can I find the SMF4L5.0A-Q datasheet download?
The SMF4L5.0A-Q datasheet is available from Bourns and includes electrical characteristics, breakdown voltage, clamping voltage, peak pulse power, package dimensions, qualification information, and ordering details.
What should be considered in SMF4L5.0A-Q PCB design?
PCB implementation should place the TVS diode close to the transient entry point, minimize loop inductance, use short and wide copper paths, provide a low-impedance return path, and confirm correct unidirectional polarity.
Is SMF4L5.0A-Q automotive qualified?
Yes. SMF4L5.0A-Q is an automotive-grade TVS diode series option with AEC-Q101 qualification positioning for automotive electronic applications.
What are common SMF4L5.0A-Q equivalent solutions?
Common alternatives include SMF4L5.0A, PESD5V0S1BA, SMF5.0A, and SMAJ5.0A depending on voltage rating, surge capability, package footprint, automotive qualification, polarity, and clamping-voltage requirements.
SMF4L5.0A-Q Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Bourns Inc.
- Package/Case:
- SOD-123F
- Series:
- SMF4L-Q
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123FL
SMF4L5.0A-Q FAQ
1.How can I place an order for SMF4L5.0A-Q through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L5.0A-Q 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 SMF4L5.0A-Q reliable?
The price and inventory of SMF4L5.0A-Q are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L5.0A-Q is usually 5 days.
3.What payment methods are accepted for SMF4L5.0A-Q?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L5.0A-Q transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L5.0A-Q?
SMF4L5.0A-Q orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L5.0A-Q 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 SMF4L5.0A-Q?
For technical support, including SMF4L5.0A-Q datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L5.0A-Q requirements.
6.How does Aetrix verify that SMF4L5.0A-Q is sourced from the original manufacturer or authorized distributors?
All SMF4L5.0A-Q 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 SMF4L5.0A-Q meets industry standards.
7.What is the process for return or replacement of SMF4L5.0A-Q?
All SMF4L5.0A-Q units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L5.0A-Q, 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 SMF4L5.0A-Q part is unused and in its original packaging.
Return procedure for SMF4L5.0A-Q:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L5.0A-Q Tags
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ESD9B5.0ST5G
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ESD5Z3.3T1G
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PESD2V0Y1BSFYL
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