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SMF12A
Good-Ark Semiconductor
TVS, UNI-DIR, 200W, 12V, ESGA (S
26467 Pcs New Original In Stock
19.9V Clamp 10.1A Ipp Tvs Diode Surface Mount SOD-123FL
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5.0 / 5.0
- (423 Ratings)
SMF12A
Product Overview
3183971
DiGi Electronics Part Number
SMF12A-DGManufacturer
Good-Ark Semiconductor
SMF12A
Description
TVS, UNI-DIR, 200W, 12V, ESGA (SInventory
26467 Pcs New Original In Stock
19.9V Clamp 10.1A Ipp Tvs Diode Surface Mount SOD-123FL
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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SMF12A Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Type
Zener
Unidirectional Channels
1
Voltage - Reverse Standoff (Typ)
12V
Voltage - Breakdown (Min)
13.3V
Voltage - Clamping (Max) @ Ipp
19.9V
Current - Peak Pulse (10/1000µs)
10.1A
Power - Peak Pulse
200W
Power Line Protection
No
Applications
General Purpose
Capacitance @ Frequency
-
Operating Temperature
-65°C ~ 150°C (TJ)
Grade
-
Qualification
-
Mounting Type
Surface Mount
Package / Case
SOD-123F
Supplier Device Package
SOD-123FL
Datasheet & Documents
Datasheets
Download SMF12A Product Specification (PDF)
HTML Datasheet
SMF12A-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.10.0080
Additional Information
Other Names
4786-SMF12ACT
4786-SMF12ADKR
4786-SMF12ATR
Standard Package
6,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
грудня 02, 2025
DiGi Electronics’ commitment to on-time delivery really stands out.
грудня 02, 2025
Their focus on affordability and dependability makes them a preferred brand.
грудня 02, 2025
The delivery was extremely fast, arriving almost instantly after I placed my order. The durability of their components has exceeded my expectations, as they still function flawlessly.
грудня 02, 2025
The packaging materials used were environmentally friendly yet strong enough to ensure a safe delivery.
грудня 02, 2025
Their products maintain high quality, and their post-sale help is unparalleled.
грудня 02, 2025
The staff is very friendly, and the prices make it easy to purchase without hesitation.
грудня 02, 2025
Their customer service team is responsive and dedicated, ensuring all issues are promptly addressed.
грудня 02, 2025
DiGi Electronics consistently provides prompt and reliable after-sales support, ensuring customer satisfaction.
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Frequently Asked Questions (FAQ)
Can the SMF12A TVS diode safely replace a SMAJ12A in a 12V automotive power line protection circuit, and what are the key risks to evaluate?
While both the SMF12A (Good-Ark) and SMAJ12A (Vishay) are 12V unidirectional TVS diodes with similar clamping voltages (~19.9V), direct replacement requires careful evaluation. The SMF12A is in a smaller SOD-123FL package versus the SMAJ12A’s DO-214AC (SMA) footprint, which reduces PCB space but may compromise thermal dissipation under sustained surge conditions. Additionally, the SMF12A’s peak pulse power rating is 200W compared to the SMAJ12A’s 400W—this means it handles lower energy transients. In automotive environments with load dump or jump-start scenarios exceeding 10.1A Ipp, the SMF12A could be at risk of thermal runaway. Verify your transient energy profile and consider adding upstream current limiting or selecting a higher-power alternative like the SMAJ15A if surge margins are tight.
What layout considerations are critical when using the SMF12A in a compact IoT device to ensure effective ESD protection without signal integrity issues?
When integrating the SMF12A into space-constrained IoT designs, place it as close as possible to the connector or entry point of the protected line to minimize inductive loop area—this is crucial for fast transients like IEC 61000-4-2 ESD events. Use short, wide traces (≥20 mil) to reduce parasitic inductance, which can cause voltage overshoot beyond the 19.9V clamp. Avoid routing sensitive analog or high-speed digital signals beneath the SMF12A or its traces. Although capacitance isn’t specified, typical SOD-123FL TVS diodes exhibit ~50–100pF; for high-speed interfaces (e.g., USB 2.0 or Ethernet), this may introduce signal degradation—consider lower-capacitance alternatives like the PESD12VS1UB if bandwidth exceeds 100MHz.
Is the SMF12A suitable for protecting a 12V industrial sensor interface against IEC 61000-4-5 surge tests, and what derating factors should be applied?
The SMF12A can provide basic surge protection for 12V sensor lines, but its 200W peak pulse power and 10.1A Ipp limit make it marginal for full IEC 61000-4-5 compliance (which often requires handling 1.2/50µs waveforms at hundreds of watts). For a 1kV surge (42Ω source), expected current exceeds 20A—far beyond the SMF12A’s capability. Use it only for low-energy transients or in conjunction with a series impedance (e.g., ferrite bead or resistor) to limit current. Always derate power handling by at least 30% at elevated temperatures (>85°C), and consider cascading with a GDT or MOV for multi-stage protection in harsh industrial environments.
How does the SMF12A compare to the Littelfuse SMAJ12A in terms of long-term reliability under repeated ESD strikes in consumer electronics?
Both the SMF12A and SMAJ12A meet basic ESD protection requirements (IEC 61000-4-2 Level 4), but long-term reliability under repeated stress differs due to construction and package robustness. The SMAJ12A’s larger DO-214AC package offers better heat dissipation and mechanical stability, leading to longer lifecycle performance in high-frequency ESD environments (e.g., touch panels or USB ports). The SMF12A’s smaller SOD-123FL form factor, while space-efficient, may experience faster degradation after hundreds of ESD events due to localized heating. For mission-critical consumer devices expecting frequent user interaction, conduct HBM/CDM testing over 1,000+ cycles; if failures occur early, upgrade to a more robust variant like the SMAJ12A or use redundant TVS placement.
Can the SMF12A be used bidirectionally by connecting two units back-to-back, and what are the trade-offs versus using a single bidirectional TVS like the SMBJ12CA?
Yes, two SMF12A diodes can be connected cathode-to-cathode to emulate bidirectional clamping, but this approach introduces significant trade-offs. The combined clamping voltage becomes asymmetric and higher than a dedicated bidirectional device—approximately ±19.9V instead of the SMBJ12CA’s symmetrical ~19V clamp. This increases stress on protected circuitry during negative transients. Additionally, the dual-SMF12A solution occupies more board area and costs more than a single SMBJ12CA. More critically, mismatch between the two SMF12A units (e.g., ±5% Vbr tolerance) can lead to uneven current sharing and premature failure. For balanced, reliable bidirectional protection in AC or RS-485 lines, prefer integrated bidirectional TVS diodes like the SMBJ12CA unless board layout constraints absolutely prohibit it.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
SMF12A CAD Models
Good-Ark Semiconductor SMF12A PCB symbols & footprints
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