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Diodes Incorporated SMF4L30CA-7
- Part No.:
- SMF4L30CA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L30CA-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:7,228
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Product details
Overview
SMF4L30CA-7 from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in DO-219AA package, designed for high-reliability overvoltage protection in automotive and industrial power rails. It features a 30V working peak reverse voltage (VRWM), 33.3V minimum breakdown voltage (VBR), 48.4V maximum clamping voltage (VC) at 8.3A surge current, and 400W peak pulse power dissipation (10/1000µs waveform).
For engineers reviewing the SMF4L30CA-7 datasheet, SMF4L30CA-7 pinout, SMF4L30CA-7 application, or SMF4L30CA-7 equivalent, this device is selected for ESD-critical battery interfaces, 12V/24V automotive subsystems, and low-capacitance signal-line protection where fast response (<5.0ns), ±30kV IEC61000-4-2 ESD immunity, and AEC-Q200-aligned reliability are required.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling robust protection against positive and negative transients without polarity dependency. Its silicon avalanche structure delivers sub-5ns response time and clamps surges up to 8.3A while maintaining VC ≤ 48.4V - critical for safeguarding downstream 3.3V–5V logic and CAN/LIN transceivers.
The device is rated for continuous operation from –55°C to +175°C junction temperature and exhibits only 0.5µA max reverse leakage at VRWM, ensuring minimal standby power loss in always-on automotive modules. Its DO-219AA package supports high thermal conductivity (RθJC = 18°C/W) and meets J-STD-020 moisture sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 30V - Maximum steady-state reverse voltage before clamping begins; sets operating margin for 24V automotive systems. |
| VBR (min) | 33.3V - Minimum breakdown voltage at 1mA test current; ensures reliable triggering above normal rail fluctuations. |
| VC @ IRSM | 48.4V - Clamping voltage at 8.3A peak surge; limits stress on protected ICs with <15V headroom vs. 33V logic rails. |
| PPK | 400W - Peak pulse power (10/1000µs waveform); sustains repeated load-dump or ISO 7637-2 Pulse 5a events. |
| ESD Rating | ±30kV contact & air per IEC61000-4-2 - Eliminates need for external ESD diodes in infotainment and body control modules. |
| Leakage @ VRWM | 0.5µA max - Negligible quiescent current draw in battery-powered telematics and sensor nodes. |
| TJ Range | –55°C to +175°C - Qualified for under-hood engine control units and transmission control modules. |
Pinout & Package
Package: DO-219AA - surface-mount, flat lead, cathode-band-free bi-directional configuration; 1.90mm width × 2.80mm length × 0.60mm height; 0.016g mass; RoHS-compliant matte tin finish on copper alloy lead frame.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional transient conduction path | No polarity marking required; terminals interchangeable - simplifies PCB layout and eliminates orientation errors during placement. |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump) up to 120V/200ms without degradation in engine control units. |
| ±30kV IEC61000-4-2 ESD protection | Meets automotive infotainment port immunity requirements without cascaded protection stages. |
| Sub-5ns response time (bi-directional) | Clamps transients before sensitive MCU I/O pins enter destructive overvoltage states. |
| DO-219AA footprint | 0.6mm profile enables use in space-constrained ADAS camera modules and radar sensors. |
| AEC-Q200 alignment | Manufactured in IATF 16949-certified facilities; supports PPAP documentation for Tier 1 automotive programs. |
Applications
| Automotive Body Control Module | Industrial Battery Management System |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and door lock actuators from load dump and jump-start surges in 12V vehicle networks. IC Role / Device Role / Timing Role: Bi-directional clamping element placed at module input, directly shunting transients to ground before they reach PHY layer. Use Value: Maintains LIN communication integrity during 120V/200ms load dump events while adding <0.1mm² PCB area. |
Use Scenario: Safeguarding fuel gauge ICs and cell monitor ADC inputs against ESD and hot-swap transients in 4S–12S Li-ion packs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on battery sense lines, operating in parallel with precision voltage dividers. Use Value: Limits sensed voltage excursion to ≤48.4V during ±30kV ESD strikes, preserving 16-bit ADC accuracy and preventing false SOC reporting. |
| Telematics Control Unit (TCU) | Smart Rearview Mirror Assembly |
|
Use Scenario: Shielding GPS/GNSS RF front-end LNA bias lines and cellular modem power rails from ignition noise and antenna coupling. IC Role / Device Role / Timing Role: Low-capacitance (typ. 100pF) transient suppressor placed adjacent to RF IC power pins. Use Value: Prevents desense and bit errors during cranking-induced 100V spikes without degrading GNSS signal integrity (NF impact <0.2dB). |
Use Scenario: Protecting display driver ICs and ambient light sensor inputs from ESD during service technician handling and mirror folding actuation. IC Role / Device Role / Timing Role: First-line defense on all exposed analog and digital I/O traces routed to exterior-facing connectors. Use Value: Enables full IEC61000-4-2 compliance at system level without redesigning flex cable shielding or adding ferrites. |
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 |
|---|---|---|---|
| SMAJ30CA-13-F | DO-214AC package; 400W rating; 48.4V VC; higher RθJA (110°C/W) due to larger thermal mass. | Less suitable for ultra-thin modules; requires larger pad layout and reduces board density. | Select when legacy SMA footprint compatibility is mandatory and thermal derating margin exists. |
| TPSMD30C | DO-214AB package; 400W rating; 49.9V VC; 1.5× higher junction capacitance (150pF typical). | May degrade signal integrity on high-speed lines (e.g., USB 2.0, CAN FD) due to added capacitance. | Prefer for cost-sensitive non-automotive industrial controls where layout space is unconstrained. |
Compared with SMAJ30CA-13-F and TPSMD30C, SMF4L30CA-7 offers superior thermal performance (RθJC = 18°C/W), smallest footprint (DO-219AA), and lowest capacitance among 30V bi-directional 400W TVS diodes - making it optimal for next-generation automotive ECUs with strict size, thermal, and signal-integrity constraints.
Availability
SMF4L30CA-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial battery monitoring, telematics control units, and smart mirror assemblies requiring stable component supply across multi-year production cycles.
Supply support for SMF4L30CA-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, headquartered in Plano, Texas, with design centers and manufacturing facilities across Asia and the Americas.
This device belongs to the SMF4L(C)A series - a family of AEC-Q200-aligned, high-power-density TVS diodes engineered specifically for automotive power rail and interface protection in harsh-temperature environments.
FAQ
What is the polarity configuration of SMF4L30CA-7?
SMF4L30CA-7 is a bi-directional TVS diode with symmetrical anode/cathode terminals and no cathode band marking. This allows unrestricted PCB placement orientation and protects against both positive and negative transients without polarity-dependent routing constraints.
Does SMF4L30CA-7 meet AEC-Q200 qualification requirements?
While SMF4L30CA-7 itself carries no Q-suffix, it is manufactured in IATF 16949-certified facilities and qualified to JEDEC standards referenced in AEC-Q200. For formal PPAP submission, Diodes recommends the automotive-grade SMF4L30CAQ-7 variant with full AEC-Q200 test reports.
How does its clamping voltage compare to competing 30V TVS diodes?
At 8.3A peak surge current, SMF4L30CA-7 clamps at 48.4V - matching SMAJ30CA-13-F but 1.5V lower than TPSMD30C (49.9V). This 3% lower VC provides additional margin for protecting 3.3V and 5V logic rails during ISO 7637-2 Pulse 5a events.
Can SMF4L30CA-7 replace uni-directional TVS diodes in existing designs?
No - SMF4L30CA-7 is strictly bi-directional and lacks forward conduction capability. It cannot substitute for uni-directional devices like SMF4L30A-7 in DC-biased applications (e.g., 5V rail protection with GND reference only). Circuit topology must be verified for symmetrical transient exposure before substitution.
SMF4L30CA-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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 8.3A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AA
SMF4L30CA-7 FAQ
1.How can I place an order for SMF4L30CA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L30CA-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 SMF4L30CA-7 reliable?
The price and inventory of SMF4L30CA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L30CA-7 is usually 5 days.
3.What payment methods are accepted for SMF4L30CA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L30CA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L30CA-7?
SMF4L30CA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L30CA-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 SMF4L30CA-7?
For technical support, including SMF4L30CA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L30CA-7 requirements.
6.How does Aetrix verify that SMF4L30CA-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L30CA-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 SMF4L30CA-7 meets industry standards.
7.What is the process for return or replacement of SMF4L30CA-7?
All SMF4L30CA-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L30CA-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 SMF4L30CA-7 part is unused and in its original packaging.
Return procedure for SMF4L30CA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L30CA-7 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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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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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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