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Diodes Incorporated SMF4L58AQ-7
- Part No.:
- SMF4L58AQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L58AQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:3,116
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Product details
Overview
SMF4L58AQ-7 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with a 58V working peak reverse voltage, 64.4V minimum breakdown voltage, and 93.6V maximum clamping voltage at 4.3A surge current. It delivers IEC61000-4-2 ±30kV ESD protection and is AEC-Q101 qualified for automotive power line and battery contact protection.
For engineers reviewing the SMF4L58AQ-7 datasheet, SMF4L58AQ-7 pinout, SMF4L58AQ-7 application, or SMF4L58AQ-7 equivalent, key selection criteria include clamping voltage margin relative to system rail, unidirectional polarity for DC-biased lines, DO-219AA package thermal performance, and AEC-Q101 qualification for under-hood electronics.
Technical Context
This TVS operates as a voltage-clamped shunt protector in parallel with sensitive circuitry. Its silicon avalanche structure triggers at VBR ≥64.4V and limits transient energy by diverting up to 4.3A (10/1000µs waveform) while holding VC ≤93.6V - ensuring downstream ICs remain below absolute maximum ratings during ISO 7637-2 pulse 1/2a/5a events.
Designed for automotive-grade reliability, it features a low RθJA of 96°C/W on FR-4 PCBs, operates from −55°C to +175°C, and uses a matte tin–annealed copper alloy leadframe for robust solderability and thermal cycling endurance in engine control units and ADAS power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W (10/1000µs waveform); sustains high-energy transients without thermal runaway |
| Working Peak Reverse Voltage | 58V; compatible with 48V automotive systems and industrial 48V DC rails |
| Breakdown Voltage (Min) | 64.4V at 1mA; ensures reliable triggering above nominal rail with margin |
| Clamping Voltage (Max) | 93.6V at 4.3A; guarantees protected ICs see <94V during worst-case surge |
| ESD Rating | ±30kV air/contact per IEC61000-4-2; eliminates need for secondary ESD stages |
| Operating Temperature | −55°C to +175°C; validated for under-hood placement near engines or inverters |
| AEC-Q101 Qualified | Yes; meets stress test requirements for automotive semiconductor reliability |
Pinout & Package
Package: DO-219AA - ultra-low-profile (max height 0.75mm), molded green plastic (UL 94V-0), 2-pin surface-mount package with cathode band marking for unidirectional polarity. Weight: 0.016g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference; completes clamping loop during overvoltage |
| Cathode | Protected line input | Connected to supply rail (e.g., 48V battery line); blocks reverse leakage (<0.5µA at 58V) |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | Typically <1.0ns from 0V to VBR; captures sub-nanosecond ESD events before IC damage occurs |
| Low clamping ratio | VC/VBR ≈ 1.46; minimizes overvoltage stress on downstream regulators and microcontrollers |
| Halogen- and antimony-free | <900ppm Br, <900ppm Cl, <1000ppm Sb; complies with automotive "Green" material directives |
| Moisture sensitivity level | MSL Level 1 (per J-STD-020); no bake required before reflow, reducing manufacturing cost |
| Lead-free & RoHS 3 compliant | Meets EU 2015/863/EU; suitable for global automotive Tier-1 production without exemptions |
Applications
| Automotive Battery Protection | Industrial 48V DC Power Input |
|---|---|
Use Scenario: Protects battery management systems (BMS) and body control modules (BCM) from load dump and jump-start surges on 12V/48V dual-voltage architectures. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery rail and primary DC-DC converter input. Use Value: Clamps ISO 7637-2 Pulse 5a (75V/100ms) to <94V, preventing overvoltage shutdown or latch-up in buck controllers. | Use Scenario: Shields programmable logic controllers (PLCs) and motor drives receiving 48V auxiliary power from industrial switch-mode supplies. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 48V input bus upstream of EMI filter and bulk capacitor. Use Value: Absorbs 400W transients without derating at +125°C ambient, maintaining uptime in factory automation environments. |
| ADAS Camera Power Line | Telematics Module ESD Interface |
Use Scenario: Secures 5V/12V power inputs to radar and camera modules mounted near vehicle exteriors exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Localized TVS adjacent to connector entry point on front-end power distribution board. Use Value: Delivers ±30kV contact ESD immunity per IEC61000-4-2, eliminating field failures from static discharge during service. | Use Scenario: Protects CAN-FD and cellular modem power pins in telematics control units (TCUs) subjected to hot-plug and antenna coupling transients. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on VCC lines feeding RF transceivers and CAN transceivers. Use Value: Maintains signal integrity with <10pF junction capacitance (typ.) while clamping fast-rising transients on shared power rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58A | DO-214AC package; higher RθJA (125°C/W); 93.6V clamping at 4.3A same | Larger footprint; less suitable for dense automotive PCBs requiring DO-219AA's 2.8mm × 1.9mm area | Select SMAJ58A only if legacy layout compatibility or higher surge current tolerance (>5A) is required |
| TPSMD58A | Same DO-219AA package; 96.8V clamping at 4.1A; slightly higher VC/VBR ratio | Non-AEC-Q101; not certified for automotive production use | Use TPSMD58A only for non-automotive industrial prototypes where qualification is not mandated |
Compared with SMAJ58A and TPSMD58A, SMF4L58AQ-7 uniquely combines AEC-Q101 qualification, DO-219AA space savings, and lowest thermal resistance in its class-making it the preferred choice for volume automotive electronics where footprint, reliability, and thermal performance are jointly constrained.
Availability
SMF4L58AQ-7 is available at Aetrix Electronics and suitable for automotive battery management, industrial 48V power inputs, and ADAS camera module protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMF4L58AQ-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, serving automotive, industrial, computing, and consumer markets with a focus on high-reliability, AEC-Q qualified components.
The SMF4L series belongs to Diodes' automotive-grade TVS portfolio, engineered specifically to meet stringent ISO 7637-2 and IEC61000-4-2 requirements for next-generation 48V mild-hybrid vehicles and ADAS subsystems.
FAQ
What is the polarity configuration of SMF4L58AQ-7?
SMF4L58AQ-7 is a unidirectional TVS diode, indicated by the cathode band marking on the DO-219AA package. It conducts only during reverse-biased overvoltage events and blocks forward current up to 3V at 16A, making it suitable for DC power line protection where polarity is fixed.
Does SMF4L58AQ-7 require derating at elevated temperatures?
Yes - its 400W peak pulse power is rated at +25°C and must be linearly derated above that temperature per Figure 1 in DS43393 Rev. 3-2. At +125°C ambient, maximum PPK drops to approximately 240W, corresponding to ~2.6A surge current at 93.6V clamping.
How does SMF4L58AQ-7 perform in ISO 7637-2 Pulse 5a testing?
SMF4L58AQ-7 clamps ISO 7637-2 Pulse 5a (75V, 100ms, 1Ω source) to ≤93.6V at 4.3A, limiting energy dissipation to within its 400W rating. Its 175°C max junction temperature and low RθJA ensure survival across full automotive temperature range without thermal runaway.
Is the DO-219AA package compatible with standard SMT reflow profiles?
Yes - DO-219AA has MSL Level 1 rating and withstands JEDEC J-STD-020-compliant lead-free reflow profiles (peak 260°C). Its matte tin finish ensures wetting reliability, and the 0.016g mass enables uniform heating without tombstoning on fine-pitch boards.
SMF4L58AQ-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):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 4.3A
- 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
SMF4L58AQ-7 FAQ
1.How can I place an order for SMF4L58AQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L58AQ-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 SMF4L58AQ-7 reliable?
The price and inventory of SMF4L58AQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L58AQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L58AQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L58AQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L58AQ-7?
SMF4L58AQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L58AQ-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 SMF4L58AQ-7?
For technical support, including SMF4L58AQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L58AQ-7 requirements.
6.How does Aetrix verify that SMF4L58AQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L58AQ-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 SMF4L58AQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L58AQ-7?
All SMF4L58AQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L58AQ-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 SMF4L58AQ-7 part is unused and in its original packaging.
Return procedure for SMF4L58AQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L58AQ-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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