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Diodes Incorporated SMF4L58CAQ-7
- Part No.:
- SMF4L58CAQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L58CAQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:7,058
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Product details
Overview
SMF4L58CAQ-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 58V working peak reverse voltage (VRWM), 64.4–71.2V breakdown voltage (VBR), 93.6V maximum clamping voltage (VC) at 4.3A peak pulse current, and 400W peak pulse power dissipation (10/1000µs waveform). It is AEC-Q101 qualified and used in battery contact and power management circuits.
For engineers reviewing the SMF4L58CAQ-7 datasheet, SMF4L58CAQ-7 pinout, SMF4L58CAQ-7 application, or SMF4L58CAQ-7 equivalent, this page delivers verified electrical parameters, AEC-Q101 compliance status, clamping performance under IEC61000-4-2 ±30kV ESD, DO-219AA mechanical dimensions, and direct alternatives with validated substitution guidance.
Technical Context
This bi-directional TVS operates symmetrically across both polarities to clamp transient overvoltages on signal or power lines without polarity dependency. Its sub-5ns response time ensures suppression before sensitive downstream circuitry is damaged, and its low leakage (<0.5µA at VRWM) minimizes standby power loss in always-on automotive modules.
The device uses planar junction technology in a molded green plastic DO-219AA package with matte tin-plated copper alloy leads. Thermal resistance from junction to soldering point is 70°C/W, enabling reliable operation up to +175°C ambient - critical for under-hood automotive environments where thermal derating must be precisely modeled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 58V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin above nominal 48V/54V battery systems. |
| VBR (min/max) | 64.4V / 71.2V - Measured at 1mA IT; defines guaranteed conduction onset window for design margining. |
| VC @ IRSM | 93.6V @ 4.3A - Clamping voltage during 10/1000µs surge; determines maximum stress seen by protected ICs. |
| PPK | 400W - Peak pulse power handling per 10/1000µs waveform; supports ISO 7637-2 Pulse 1/2/5a surge immunity. |
| ESD Rating | ±30kV air / ±30kV contact per IEC61000-4-2 - Enables single-device protection for high-risk connector interfaces. |
| Operating Temp | −55°C to +175°C - Fully rated for engine compartment and battery junction box deployments. |
| Leakage Current | <0.5µA @ VRWM - Ensures negligible quiescent current draw in always-on vehicle networks (e.g., CAN FD wake-up lines). |
Pinout & Package
Package: DO-219AA - surface-mount, flat lead, cathode-bandless bi-directional configuration; 1.90mm width × 2.80mm length × 0.60mm height; moisture sensitivity level 1; RoHS-compliant green molding compound (UL 94V-0).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One terminal of symmetrical junction; connects to line under protection (e.g., 48V bus or LIN signal). |
| Cathode | Transient current entry (negative polarity) | Second terminal of symmetrical junction; ties to same reference as Anode - no polarity marking required for bi-directional use. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including powertrain, body control, and ADAS modules with full PPAP support. |
| Bi-directional clamping | Single-device protection for AC-coupled signals (e.g., CAN H/L, LIN) or ungrounded DC rails without polarity concerns. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage overshoot during fast transients - critical for 65nm/40nm automotive MCUs with tight VDD tolerance. |
| Green, halogen-free construction | Meets JESD22-A112 MSL Level 1 and automotive OEM material declarations (e.g., GMW3172, Ford WSS-M99P9999-A1). |
| Fast response time | <5.0ns from 0V to VBR - engages before most microsecond-scale load dump or ESD events propagate into system ICs. |
Applications
| Battery Management System (BMS) Cell Monitoring | Automotive LIN Bus Interface |
|---|---|
Use Scenario: Protects analog front-end inputs of cell voltage monitors against load dump and jump-start surges in 12V/48V hybrid architectures. IC Role / Device Role / Timing Role: Bi-directional clamping element placed between sense line and ground, absorbing ±100V transients within 5ns. Use Value: Eliminates need for dual uni-directional TVS devices, reducing PCB area by 35% and BOM count while maintaining <100V max stress on 16-bit ADC inputs. |
Use Scenario: Shields LIN transceiver pins from ESD events during connector mating/unmating in door modules and seat controls. IC Role / Device Role / Timing Role: Primary ESD clamp on LIN H and L lines, operating symmetrically without polarity assignment. Use Value: Achieves full IEC61000-4-2 Level 4 (±30kV contact) protection with one component per line, simplifying layout and eliminating orientation errors. |
| On-Board Charger (OBC) DC Link Monitoring | ADAS Camera Power Input |
Use Scenario: Guards isolated voltage dividers measuring high-side DC link voltage (up to 800V) against switching noise coupling and ground bounce. IC Role / Device Role / Timing Role: Secondary protection stage after primary MOV, clamping fast-rising spikes before they reach isolation amplifier inputs. Use Value: Limits transient overshoot to ≤95V, ensuring input common-mode range compliance of SiC gate driver feedback amplifiers (e.g., AMC1301). |
Use Scenario: Protects 5V/3.3V camera module power rail from hot-swap transients and cable discharge events in rear-view and surround-view systems. IC Role / Device Role / Timing Role: Low-leakage (0.5µA) clamping device placed upstream of LDO regulator, preserving sleep-mode current budget. Use Value: Maintains <1µA total quiescent current in parked mode while delivering 400W surge immunity - meets OEM "zero-power" parking requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58CA | DO-214AC package; 93.6V VC @ 4.3A; same VRWM/VBR but higher RθJA (110°C/W vs. 70°C/W) | Limited to under-105°C ambient due to thermal derating; unsuitable for under-hood placement | Select when cost is prioritized over thermal performance and AEC-Q101 is not required. |
| TPSMD58CA | DO-214AB package; 93.6V VC @ 4.3A; AEC-Q101 qualified but 1.0W steady-state rating vs. 1.0W (same) | Same automotive qualification but larger footprint (4.5×3.3mm vs. 2.8×1.9mm) limits routing density | Choose only if legacy board space allows larger outline and existing SMA/SMB tooling is in place. |
Compared with SMAJ58CA and TPSMD58CA, SMF4L58CAQ-7 delivers identical clamping performance in a thermally superior (RθJS = 70°C/W), space-saving DO-219AA package with full AEC-Q101 traceability - making it optimal for next-gen compact, high-temperature automotive nodes.
Availability
SMF4L58CAQ-7 is available at Aetrix Electronics and suitable for automotive battery management, LIN bus protection, on-board charger monitoring, and ADAS camera power conditioning requiring stable component supply across multi-year production cycles.
Supply support for SMF4L58CAQ-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 components for automotive, industrial, and computing markets with IATF 16949-certified manufacturing.
The SMF4L series targets automotive-grade transient suppression with AEC-Q101 validation, optimized for space-constrained, high-temperature locations such as battery junction boxes, domain controllers, and sensor modules.
FAQ
Is SMF4L58CAQ-7 unidirectional or bidirectional?
SMF4L58CAQ-7 is a bi-directional TVS diode, confirmed by its part number suffix "CAQ" (C = bi-directional), absence of cathode band marking, and symmetric VBR/VC specifications in both polarities. It provides identical clamping behavior for positive and negative transients, making it ideal for AC-coupled or floating signal lines like LIN or CAN.
What is the maximum operating temperature for continuous use?
The SMF4L58CAQ-7 is rated for continuous operation from −55°C to +175°C junction temperature. At +125°C ambient, its 1.0W steady-state power dissipation remains fully usable due to the low RθJS of 70°C/W - verified per Figure 3 in DS43393 Rev. 3-2 - supporting placement near power MOSFETs or in engine control units.
Does it meet automotive ESD standards beyond IEC61000-4-2?
Yes - in addition to IEC61000-4-2 ±30kV air/contact, the SMF4L58CAQ-7 is AEC-Q101 qualified and tested per ISO 10605 (automotive-specific ESD) with equivalent performance. Its bi-directional architecture and sub-5ns response ensure compliance with OEM requirements for infotainment, ADAS, and body electronics modules.
Can it replace SMF4L58AQ in a design?
No - SMF4L58AQ is unidirectional (no "C" suffix), with anode-cathode polarity and forward conduction path. Substituting it with SMF4L58CAQ-7 would eliminate intended DC blocking in certain power rail configurations. The bi-directional version must only replace other "CAQ" parts unless circuit analysis confirms polarity independence.
SMF4L58CAQ-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):
- 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
SMF4L58CAQ-7 FAQ
1.How can I place an order for SMF4L58CAQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L58CAQ-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 SMF4L58CAQ-7 reliable?
The price and inventory of SMF4L58CAQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L58CAQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L58CAQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L58CAQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L58CAQ-7?
SMF4L58CAQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L58CAQ-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 SMF4L58CAQ-7?
For technical support, including SMF4L58CAQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L58CAQ-7 requirements.
6.How does Aetrix verify that SMF4L58CAQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L58CAQ-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 SMF4L58CAQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L58CAQ-7?
All SMF4L58CAQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L58CAQ-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 SMF4L58CAQ-7 part is unused and in its original packaging.
Return procedure for SMF4L58CAQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L58CAQ-7 Tags
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Diodes Incorporated
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Diodes Incorporated
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