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SMF43A-M3-08
Vishay General Semiconductor - Diodes Division
TVS DIODE 43VWM 69.4VC SMF
65370 Pcs New Original In Stock
69.4V Clamp 2.9A Ipp Tvs Diode Surface Mount DO-219AB (SMF)
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SMF43A-M3-08
Product Overview
1044042
DiGi Electronics Part Number
SMF43A-M3-08-DGManufacturer
Vishay General Semiconductor - Diodes Division
SMF43A-M3-08
Description
TVS DIODE 43VWM 69.4VC SMFInventory
65370 Pcs New Original In Stock
69.4V Clamp 2.9A Ipp Tvs Diode Surface Mount DO-219AB (SMF)
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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SMF43A-M3-08 Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Tape & Reel (TR)
Series
eSMP®
Product Status
Active
Type
Zener
Unidirectional Channels
1
Voltage - Reverse Standoff (Typ)
43V
Voltage - Breakdown (Min)
47.8V
Voltage - Clamping (Max) @ Ipp
69.4V
Current - Peak Pulse (10/1000µs)
2.9A
Power - Peak Pulse
200W
Power Line Protection
No
Applications
General Purpose
Capacitance @ Frequency
165pF @ 1MHz
Operating Temperature
-65°C ~ 175°C (TJ)
Mounting Type
Surface Mount
Package / Case
DO-219AB
Supplier Device Package
DO-219AB (SMF)
Base Product Number
SMF43
Datasheet & Documents
HTML Datasheet
SMF43A-M3-08-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
Standard Package
30,000
Alternative Parts
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Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Einkaufen auf der Webseite ist ein Kinderspiel, und die Preise sind unschlagbar günstig.
Dec 02, 2025
Their customer service team provides helpful guidance after purchase, enhancing the overall experience.
Dec 02, 2025
I appreciate their commitment to affordable prices without compromising quality.
Dec 02, 2025
Tracking my order with DiGi Electronics has been straightforward and transparent.
Dec 02, 2025
I've always appreciated their affordable pricing and environmentally conscious packaging.
Dec 02, 2025
DiGi Electronics' extensive range supports our diverse curriculum planning and execution.
Dec 02, 2025
The quality assurance from DiGi Electronics is evident in every purchase I make.
Dec 02, 2025
Their commitment to after-sales support makes them a preferred choice for many customers.
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Frequently Asked Questions (FAQ)
Can I use the SMF43A-M3-08 TVS diode to protect a 48V industrial sensor interface from inductive load transients, and what are the key risks if the actual transient voltage exceeds the 69.4V clamping voltage?
The SMF43A-M3-08 is suitable for protecting 48V systems like industrial sensor interfaces due to its 43V reverse standoff and 47.8V minimum breakdown voltage, providing a safety margin. However, if transients generate voltages significantly above 69.4V (e.g., from high-energy inductive kicks), the clamping may be insufficient, risking damage to downstream circuitry. To mitigate this, combine the SMF43A-M3-08 with a series current-limiting resistor or an upstream fuse, and validate performance using IEC 61000-4-5 surge testing. Always verify that your protected ICs can tolerate brief exposure to 69.4V pulses.
How does the SMF43A-M3-08 compare to the PTVS64VS1UTR for protecting a 42V automotive CAN bus line, and which offers better long-term reliability under repeated surge events?
While both diodes protect similar voltage ranges, the SMF43A-M3-08 (43V standoff, 200W peak power) is optimized for lower-energy, high-reliability applications with superior thermal performance up to 175°C junction temperature. In contrast, the PTVS64VS1UTR has a higher standoff (64V) but lower peak power handling. For a 42V CAN bus, the SMF43A-M3-08 provides tighter voltage control during transients and better endurance under repeated 10/1000µs pulses due to Vishay’s eSMP® packaging. Choose the SMF43A-M3-08 when system voltage stays below 43V and surge energy is moderate; avoid it if input spikes regularly exceed 50V.
Is it safe to replace a failed SMF43A-M3-08 with the SMF43A-TP in a high-vibration PCB assembly, and what layout considerations are critical to prevent mechanical failure?
Yes, the SMF43A-TP is electrically equivalent and RoHS-compliant, making it a valid replacement. However, the 'TP' suffix indicates tape-and-reel packaging without changes to the DO-219AB (SMF) package itself. In high-vibration environments, ensure adequate solder fillet formation and avoid placing the SMF43A-M3-08 near board edges or flex points. Use NSMD (non-solder-mask-defined) pads with proper stencil aperture design to enhance mechanical adhesion. Perform thermal cycling tests post-replacement to confirm joint integrity, as repeated stress can fatigue smaller SMD packages like DO-219AB.
What happens if I operate the SMF43A-M3-08 continuously near its 43V reverse standoff voltage in a 45V nominal power rail, and how does this affect long-term leakage and reliability?
Operating the SMF43A-M3-08 continuously at or above its 43V reverse standoff voltage—such as on a 45V rail—pushes it close to its 47.8V breakdown threshold, significantly increasing reverse leakage current. This can lead to thermal runaway over time, especially at elevated ambient temperatures, reducing diode lifespan and potentially causing premature failure. For 45V rails, select a higher standoff TVS like the SMF48A or SMF58A series. If you must use the SMF43A-M3-08, derate the system voltage to ≤40V and monitor junction temperature to stay well below 175°C under all conditions.
Can the SMF43A-M3-08 be used in parallel with another TVS diode for higher surge current handling, and what are the risks of current imbalance during fast transient events?
Paralleling the SMF43A-M3-08 with another TVS diode is not recommended due to inherent manufacturing variations in breakdown voltage (±5% typical), which cause unequal current sharing during fast transients like ESD or lightning surges. The diode with slightly lower breakdown will conduct most of the 2.9A peak pulse, potentially exceeding its 200W rating and failing short-circuit. Instead of paralleling, select a single higher-power device such as the SMAJ58A (400W) or use a multi-stage protection scheme with a bulk capacitor and ferrite bead upstream. If redundancy is required, use diodes from the same reel and verify sharing with empirical testing under 10/1000µs waveforms.
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SMF43A-M3-08 CAD Models
Vishay General Semiconductor - Diodes Division SMF43A-M3-08 PCB symbols & footprints
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