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Diodes Incorporated SMF4L10CAQ-7
- Part No.:
- SMF4L10CAQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L10CAQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:4,071
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Product details
Overview
SMF4L10CAQ-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 10V working peak reverse voltage (VRWM), 11.1–12.3V breakdown voltage (VBR), 17V maximum clamping voltage (VC) at 23.5A peak pulse current, and 400W peak pulse power (10/1000µs). It is AEC-Q101 qualified and used in battery contact and power management circuits.
For engineers reviewing the SMF4L10CAQ-7 datasheet, SMF4L10CAQ-7 pinout, SMF4L10CAQ-7 application, or SMF4L10CAQ-7 equivalent, key selection criteria include clamping voltage vs. surge current, bi-directional polarity for AC-coupled lines, AEC-Q101 qualification status, IEC61000-4-2 ±30kV ESD rating, and DO-219AA thermal performance under high-density PCB layouts.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling protection of differential or AC signal paths without polarity constraints. Its sub-5ns response time ensures suppression before sensitive downstream circuitry sustains damage during fast transients like ISO 7637-2 pulses or ESD events.
The device uses planar junction silicon technology with low dynamic impedance to maintain tight clamping across its 23.5A IPP rating. Thermal resistance RθJA = 96°C/W (on 1"×1" FR-4, 2 oz Cu) supports sustained operation in automotive under-hood environments up to +175°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 10 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected line voltage. |
| VBR (min/max) | 11.1 V / 12.3 V - Breakdown initiates within this range at 1 mA test current; defines onset of clamping behavior. |
| VC @ IPP | 17 V @ 23.5 A - Clamping voltage measured at peak pulse current; determines maximum stress imposed on protected IC inputs. |
| PPK | 400 W - Peak pulse power handling (10/1000 µs waveform); quantifies single-event surge energy absorption capability. |
| ESD Rating | ±30 kV (air/contact per IEC61000-4-2) - Confirmed immunity level for human-body-model-like discharges in end-equipment testing. |
| Operating Temp | −55 °C to +175 °C - Full automotive temperature range support; enables use in engine control units and battery management systems. |
| AEC-Q101 | Qualified - Validated for automotive reliability including HTOL, TCT, and ESD stress; PPAP-capable with IATF 16949 manufacturing. |
Pinout & Package
Package: DO-219AA - Surface-mount, flat-lead, green molded plastic case (UL 94V-0), 0.016 g weight, moisture sensitivity level 1. Cathode band omitted to indicate bi-directional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional terminals | No polarity marking; either terminal serves as anode or cathode depending on transient polarity - enables placement on bidirectional lines (e.g., CAN, USB D+/D−) without orientation concern. |
| Case / Mold Compound | Thermal path & mechanical interface | Low RθJC = 18°C/W to die; soldered pad provides primary heat dissipation path - requires minimum 2.8 mm × 1.5 mm copper pad per datasheet layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or differential interfaces (e.g., LIN, CAN FD) without external polarity logic or dual-device redundancy. |
| Fast response time | <5.0 ns turn-on from 0 V to VBR - limits voltage overshoot during nanosecond-scale ESD events before downstream CMOS inputs latch-up or gate oxide ruptures. |
| Low clamping ratio | VC/VRWM = 1.7 - superior voltage margin over competing 400W TVS devices (typical ratio >1.9), reducing risk of overvoltage damage to 3.3V/5V logic rails. |
| Halogen- and antimony-free | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - meets automotive OEM green material specifications (e.g., GMW3172, Ford WSS-M99P9999-A1) without compromising surge robustness. |
Applications
| Battery Management Systems | Automotive Infotainment Interfaces |
|---|---|
Use Scenario: Protection of 12V battery feed lines against load dump and jump-start surges in BMS monitoring ICs and coulomb counters. IC Role / Device Role: Primary clamping element placed upstream of linear regulators and ADC reference inputs. Use Value: 17V VC limits stress on 24V-tolerant analog front-ends while surviving 400W transients - eliminates need for series resistors or additional filtering stages. |
Use Scenario: ESD protection on USB 2.0 data lines (D+/D−) connecting head unit to rear-seat displays or mobile devices. IC Role / Device Role: Bi-directional TVS placed directly at connector, before USB transceiver IC. Use Value: Symmetric ±30kV IEC61000-4-2 rating and sub-5ns response prevent bit errors and PHY lockup during hot-plug events without degrading 480 Mbps signal integrity. |
| Engine Control Unit Sensors | ADAS Camera Power Inputs |
Use Scenario: Transient suppression on 5V sensor supply rails (e.g., MAP, O2 sensors) exposed to ignition noise and alternator ripple. IC Role / Device Role: Secondary protection stage after bulk capacitance, adjacent to LDO input pins. Use Value: 10V VRWM aligns with nominal 5V rail + 100% tolerance; 23.5A IPP handles ISO 7637-2 Pulse 5a without derating - extends LDO lifetime under repeated surge exposure. |
Use Scenario: Input protection for 12V camera modules mounted near vehicle exterior, subject to lightning-induced surges and ESD from mounting hardware. IC Role / Device Role: First-line defense at FAKRA connector entry point before DC-DC converter. Use Value: AEC-Q101 qualification and −55°C to +175°C operation ensure reliability in thermal cycling environments; DO-219AA footprint minimizes board area vs. SMA alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10CA | DO-214AC package; higher RθJA = 110°C/W; same VRWM/VBR/VC specs but lower IPP (24.1A). | Limited to ambient-temp-limited industrial designs; unsuitable for under-hood automotive due to thermal derating. | Select when cost is prioritized over thermal margin and AEC-Q101 is not required. |
| TPSMD10CA | DO-214AB package; 600W PPK; higher VC = 18.2V at 32.4A; RoHS-compliant but not AEC-Q101 qualified. | Higher clamping voltage increases risk to 3.3V/5V logic; lacks automotive change control and PPAP documentation. | Select only for non-automotive industrial equipment where 600W surge margin outweighs clamping voltage penalty. |
Compared with SMAJ10CA and TPSMD10CA, SMF4L10CAQ-7 delivers optimal balance of automotive qualification, low clamping voltage, and thermally efficient DO-219AA packaging - making it the preferred choice for space-constrained, high-reliability automotive electronics.
Availability
SMF4L10CAQ-7 is available at Aetrix Electronics and suitable for automotive battery management, infotainment interface protection, and ADAS camera power conditioning requiring stable component supply across extended production lifecycles.
Supply support for SMF4L10CAQ-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 integrated circuits, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The SMF4Lxx(C)AQ series belongs to Diodes' automotive-qualified TVS portfolio, engineered specifically for ESD and surge resilience in harsh-temperature vehicle subsystems - emphasizing AEC-Q101 compliance, low clamping ratios, and green material content.
FAQ
What does the 'C' in SMF4L10CAQ-7 signify?
The 'C' denotes bi-directional configuration, distinguishing it from uni-directional variants (e.g., SMF4L10AQ-7). Bi-directional devices lack a cathode band and provide symmetrical clamping for AC signals or differential buses like CAN or USB. This is confirmed in the Electrical Characteristics table and Marking Information section of DS43393 Rev. 3-2.
Is SMF4L10CAQ-7 compatible with lead-free reflow profiles?
Yes - it features a matte tin finish on copper alloy leadframe, qualified for Pb-free soldering per JEDEC J-STD-020. The device supports peak reflow temperatures up to 260°C (MSL Level 1), with no pre-bake required. Its green molding compound meets UL 94V-0 flammability standards and complies with RoHS 3 (2015/863/EU).
How does SMF4L10CAQ-7 perform under repeated surge stress?
It maintains stable VBR and VC parameters after 1000+ 10/1000µs pulses at rated IPP (23.5A), per Diodes' AEC-Q101 stress test protocol. Degradation is limited to <5% shift in clamping voltage, verified through HTOL and surge endurance validation - critical for battery contact protection where surges occur frequently during vehicle service.
Can SMF4L10CAQ-7 replace SMAJ10CA in existing designs?
Yes, with layout adaptation: DO-219AA (SMF4L10CAQ-7) is smaller than DO-214AC (SMAJ10CA) and requires revised pad dimensions (2.86 mm × 1.52 mm vs. 3.5 mm × 2.5 mm). Electrical substitution is direct - identical VRWM, VBR, and VC - but thermal performance improves by 13°C/W, allowing higher ambient operation without derating.
SMF4L10CAQ-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):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 23.5A
- 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
SMF4L10CAQ-7 FAQ
1.How can I place an order for SMF4L10CAQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L10CAQ-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 SMF4L10CAQ-7 reliable?
The price and inventory of SMF4L10CAQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L10CAQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L10CAQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L10CAQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L10CAQ-7?
SMF4L10CAQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L10CAQ-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 SMF4L10CAQ-7?
For technical support, including SMF4L10CAQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L10CAQ-7 requirements.
6.How does Aetrix verify that SMF4L10CAQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L10CAQ-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 SMF4L10CAQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L10CAQ-7?
All SMF4L10CAQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L10CAQ-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 SMF4L10CAQ-7 part is unused and in its original packaging.
Return procedure for SMF4L10CAQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L10CAQ-7 Tags
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