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Diodes Incorporated SMF4L200A-7
- Part No.:
- SMF4L200A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L200A-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:8,708
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Product details
Overview
SMF4L200A-7 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for high-energy ESD and surge protection in DC power lines and signal interfaces. It features a 200V working peak reverse voltage (VRWM), 224V minimum breakdown voltage (VBR), 324V maximum clamping voltage (VC) at 1.2A peak pulse current, and IEC61000-4-2 ±30kV air/contact ESD rating - deployed in automotive battery terminals and industrial power management systems.
For engineers reviewing the SMF4L200A-7 datasheet, SMF4L200A-7 pinout, SMF4L200A-7 application, or SMF4L200A-7 equivalent, key selection criteria include clamping performance under 10/1000µs surge, DO-219AA package thermal resistance (RθJA = 96°C/W), unidirectional polarity marking (cathode band), and compliance with AEC-Q200-referenced reliability standards for harsh-environment deployment.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds its 224V breakdown threshold, it avalanches to divert surge current away from downstream circuitry while maintaining ≤324V across protected nodes. Its fast response time (<1.0ns for unidirectional operation) ensures suppression before sensitive ICs experience overstress.
The device uses silicon avalanche junction technology in a planar construction, optimized for low capacitance (typical <100pF at 0V, per family data), minimal leakage (<1.2µA at VRWM), and stable parametric behavior over -55°C to +175°C operating range - critical for under-hood automotive and industrial control applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W (10/1000µs waveform): sustains single high-energy surges without failure in 12V–48V power rails. |
| Working Peak Reverse Voltage (VRWM) | 200V: maximum continuous DC voltage applied without significant leakage; sets upper limit for system nominal bus voltage. |
| Breakdown Voltage (VBR) | 224V min @ 1mA: guaranteed avalanche initiation point; ensures reliable triggering above normal operating transients. |
| Clamping Voltage (VC) | 324V max @ 1.2A: maximum voltage seen by protected circuit during specified surge; defines worst-case stress on downstream components. |
| ESD Rating | ±30kV air / ±30kV contact (IEC61000-4-2): meets highest-level system-level ESD immunity requirements for exposed connectors. |
| Thermal Resistance (RθJA) | 96°C/W: enables 1.0W steady-state dissipation on standard FR-4 PCB; informs layout cooling requirements. |
| Polarity | Unidirectional (cathode band marked): blocks reverse conduction; used where DC bias polarity is fixed and reverse surge is not expected. |
Pinout & Package
Package: DO-219AA - ultra-compact surface-mount plastic package (2.80mm × 1.90mm × 0.60mm height), molded with UL 94V-0 green compound, matte tin-plated copper alloy leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest-potential node; completes clamping path during positive transients. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., battery+); cathode band identifies polarity for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power handling | Supports robust protection against ISO 7637-2 Pulse 1/2a/5a surges in 24V automotive systems without derating. |
| Ultra-fast response (<1.0ns) | Activates before most microcontrollers or CAN transceivers can be damaged by sub-microsecond ESD events. |
| Low leakage (<1.2µA at 200V) | Minimizes standby power loss in always-on battery-powered modules such as telematics or ADAS sensors. |
| AEC-Q200 referenced qualification | Validated for high-reliability use in automotive electronics per JEDEC standards; supports PPAP documentation. |
| Halogen- and antimony-free "Green" construction | Complies with RoHS 3 (2015/863/EU) and automotive environmental directives without compromising surge performance. |
Applications
| Battery Terminal Protection | Automotive Power Distribution |
|---|---|
Use Scenario: Installed across 12V/24V battery inputs in engine control units (ECUs) and body control modules (BCMs) to suppress load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS that clamps voltage spikes to ≤324V within <1ns, protecting downstream PMICs and microcontrollers. Use Value: Prevents latch-up or gate oxide damage in 40V-rated power management ICs during 120V/50ms load dump events per ISO 7637-2. | Use Scenario: Placed at fuse box outputs feeding infotainment head units and ADAS camera modules to suppress coupled surges from alternator switching noise. IC Role / Device Role / Timing Role: Standoff voltage (200V) exceeds nominal 24V rail with margin; clamping action limits transient overshoot during ignition cycling. Use Value: Enables use of cost-optimized 36V-input DC-DC converters instead of 60V-rated alternatives, reducing BOM cost and footprint. |
| Industrial PLC I/O Protection | Telecom Power Interface |
Use Scenario: Mounted on DIN-rail mounted programmable logic controller (PLC) backplanes to protect 24V digital input channels from field-wiring induced surges. IC Role / Device Role / Timing Role: Unidirectional configuration prevents reverse conduction during normal 24V sourcing; clamps fast-rising transients from relay coil flyback. Use Value: Eliminates need for external series impedance or RC snubbers, simplifying board layout and improving channel density. | Use Scenario: Integrated into 48V PoE++ (IEEE 802.3bt) midspan injectors to safeguard Ethernet PHY power pins against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Withstands repeated 10/1000µs surges up to 400W while maintaining <100pF capacitance to avoid signal integrity degradation on 1Gbps links. Use Value: Meets IEC 61000-4-5 Level 4 (4kV line-earth) without degrading Ethernet jitter or insertion loss specifications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ200A | DO-214AC package; higher RθJA (125°C/W); 324V VC same, but lower IPP (1.2A vs SMAJ's 1.1A). | Larger footprint (4.5mm × 2.7mm) limits use in space-constrained automotive modules. | Select when legacy DO-214AC footprint compatibility is required and thermal margin allows. |
| SMCJ200A | DO-214AB package; 1500W rating; 324V VC; 4.7A IPP; RθJA = 18°C/W (junction-to-case). | Designed for chassis-grounded high-power surge paths (e.g., AC input stages), not PCB-level signal-line protection. | Choose only for primary-level protection where 1500W energy absorption and bolt-down mounting are needed. |
Compared with SMAJ200A and SMCJ200A, SMF4L200A-7 delivers identical clamping performance in a 60% smaller footprint and superior thermal efficiency (RθJA 96°C/W vs 125°C/W), making it optimal for dense, thermally constrained automotive and industrial PCBs requiring localized 200V rail protection.
Availability
SMF4L200A-7 is available at Aetrix Electronics and suitable for automotive battery management, industrial PLC I/O modules, and telecom power interface designs requiring stable component supply, AEC-Q200-aligned reliability, and compact DO-219AA packaging.
Supply support for SMF4L200A-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 protection, power management, and signal integrity solutions for automotive, industrial, and computing markets.
The SMF4Lx.xA series belongs to Diodes' high-power surface-mount TVS portfolio, engineered specifically for space-constrained, high-surge environments where low-profile clamping and AEC-Q200-aligned robustness are mandatory.
FAQ
What is the maximum clamping voltage of SMF4L200A-7 under standardized surge conditions?
The maximum clamping voltage (VC) is 324V at 1.2A peak pulse current using the 10/1000µs waveform per IEC 61000-4-5. This value is measured at TA = +25°C and represents the worst-case voltage imposed on protected circuitry during a defined surge event - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMF4L200A-7 suitable for bidirectional signal line protection?
No - SMF4L200A-7 is unidirectional, indicated by the cathode band marking. For bidirectional protection (e.g., USB data lines or RS-485), the bi-directional variant SMF4L200CA must be used. Using the unidirectional part on AC-coupled or dual-polarity signals risks forward conduction and permanent damage during negative transients.
How does the DO-219AA package affect thermal performance compared to SMA or SMB packages?
The DO-219AA package achieves RθJA = 96°C/W on standard FR-4, significantly better than SMA (RθJA ≈ 125°C/W) due to its low-profile geometry and optimized thermal path through the cathode tab. This allows higher sustained power dissipation in compact layouts - verified via JEDEC JESD51-2 compliant testing and documented in Diodes' thermal characterization reports.
Does SMF4L200A-7 meet automotive qualification requirements out of the box?
It is qualified to JEDEC high-reliability standards referenced in AEC-Q200 and manufactured in IATF 16949-certified facilities, but formal AEC-Q200 certification requires the Q-suffix variant (e.g., SMF4L200AQ). For production automotive programs, Diodes recommends the Q-part to ensure full PPAP compliance, change control, and audit-ready documentation.
SMF4L200A-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):
- 200V
- Voltage - Breakdown (Min):
- 224V
- Voltage - Clamping (Max) @ Ipp:
- 324V
- Current - Peak Pulse (10/1000µs):
- 1.2A
- 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
SMF4L200A-7 FAQ
1.How can I place an order for SMF4L200A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L200A-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 SMF4L200A-7 reliable?
The price and inventory of SMF4L200A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L200A-7 is usually 5 days.
3.What payment methods are accepted for SMF4L200A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L200A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L200A-7?
SMF4L200A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L200A-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 SMF4L200A-7?
For technical support, including SMF4L200A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L200A-7 requirements.
6.How does Aetrix verify that SMF4L200A-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L200A-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 SMF4L200A-7 meets industry standards.
7.What is the process for return or replacement of SMF4L200A-7?
All SMF4L200A-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L200A-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 SMF4L200A-7 part is unused and in its original packaging.
Return procedure for SMF4L200A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L200A-7 Tags
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Diodes Incorporated
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Diodes Incorporated
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