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SM5S20AHE3_A/I
Vishay General Semiconductor - Diodes Division
TVS DIODE 20VWM 32.4VC DO218AB
4351 Pcs New Original In Stock
32.4V Clamp 111A Ipp Tvs Diode Surface Mount DO-218AB
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5.0 / 5.0
- (328 Ratings)
SM5S20AHE3_A/I
Product Overview
1005658
DiGi Electronics Part Number
SM5S20AHE3_A/I-DGManufacturer
Vishay General Semiconductor - Diodes Division
SM5S20AHE3_A/I
Description
TVS DIODE 20VWM 32.4VC DO218ABInventory
4351 Pcs New Original In Stock
32.4V Clamp 111A Ipp Tvs Diode Surface Mount DO-218AB
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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SM5S20AHE3_A/I Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Tape & Reel (TR)
Series
PAR®
Product Status
Active
Type
Zener
Unidirectional Channels
1
Voltage - Reverse Standoff (Typ)
20V
Voltage - Breakdown (Min)
22.2V
Voltage - Clamping (Max) @ Ipp
32.4V
Current - Peak Pulse (10/1000µs)
111A
Power - Peak Pulse
3600W (3.6kW)
Power Line Protection
No
Applications
-
Capacitance @ Frequency
-
Operating Temperature
-55°C ~ 175°C (TJ)
Grade
Automotive
Qualification
AEC-Q101
Mounting Type
Surface Mount
Package / Case
DO-218AB
Supplier Device Package
DO-218AB
Base Product Number
SM5S20
Datasheet & Documents
HTML Datasheet
SM5S20AHE3_A/I-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
750
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Leur délai d'expédition est imbattable, et leur support après-vente est d'une grande qualité.
de desembre 02, 2025
We appreciate how quickly DiGi Electronics processes our orders, reducing downtime in our planning.
de desembre 02, 2025
Their products are a great investment, delivering consistent performance.
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Frequently Asked Questions (FAQ)
What are the key design risks when using the SM5S20AHE3_A/I for automotive load dump protection in a 24V system?
When using the SM5S20AHE3_A/I for 24V automotive systems, the primary risk is insufficient voltage margin between the normal operating voltage (typically up to 28V during load dump transients) and the device's 32.4V clamping voltage. Although the SM5S20AHE3_A/I has a 20V reverse standoff and 32.4V max clamping at 111A, prolonged exposure to transients near its clamping level may stress downstream components rated below 35V. To mitigate risk, ensure downstream ICs (e.g., microcontrollers or LDOs) are rated above 35V or combine the SM5S20AHE3_A/I with a series resistive or inductive element for voltage sharing. Also verify thermal performance under repetitive pulse conditions due to its 3.6kW peak pulse rating being time-limited per the AEC-Q101 stress test criteria.
Can the SM5S20AHE3_A/I replace a SM6S20AHE3_A in a high-energy surge circuit, and what layout adjustments are required?
Yes, the SM5S20AHE3_A/I can replace the SM6S20AHE3_A in many surge protection applications, but with critical trade-offs. The SM5S20AHE3_A/I is in a DO-218AB package with lower thermal mass than the SM6S20AHE3_A's DO-277 package, reducing sustained power dissipation capability. To safely use the SM5S20AHE3_A/I as a replacement, minimize PCB trace inductance with short, wide connections to ground and optimize copper pour around the device for heat dissipation. Monitor junction temperature in high-cycle surge environments—especially above 85°C ambient—since its smaller body raises thermal impedance. Validate performance under ISO 7637-2 and ISO 16750-2 pulse tests to confirm reliability.
How does the SM5S20AHE3_A/I perform in repetitive ESD events compared to SP3415BAHTF, and which is better for CAN bus protection?
The SM5S20AHE3_A/I is less suitable than the SP3415BAHTF for CAN bus protection due to higher clamping voltage and lack of low-capacitance optimization. The SP3415BAHTF is designed for signal lines with low capacitance (~30pF) and tight clamping, while the SM5S20AHE3_A/I has no specified capacitance and clamps at 32.4V—too high for 5V or 3.3V CAN transceivers. For CAN bus, using the SM5S20AHE3_A/I risks damaging communication ICs during ESD events (e.g., IEC 61000-4-2). Instead, use SP3415BAHTF or similar low-capacitance TVS arrays for signal integrity. Reserve SM5S20AHE3_A/I for higher-power rail protection such as 12V/24V main lines where its 3.6kW rating is beneficial.
What are the PCB layout best practices to maximize surge current handling of the SM5S20AHE3_A/I in an AEC-Q101 compliant design?
To maximize surge performance of the SM5S20AHE3_A/I in automotive designs, follow AEC-Q101-compliant layout practices: use at least 2oz copper with ≥100mm² thermal pad connected via multiple vias to internal ground planes; keep traces short and wide (≥50mil) to reduce inductance that could cause voltage overshoot during fast transients; place the SM5S20AHE3_A/I as close as possible to the entry point of surge-prone connectors; and avoid daisy-chaining protection devices. These steps ensure the full 111A peak pulse (10/1000µs) current is handled without PCB damage or thermal runaway. Also, verify assembly processes control solder volume to prevent thermal cracks under thermal cycling.
Is the SM5S20AHE3_A/I suitable for industrial motor drive gate driver supply protection, and what are the failure mode risks?
The SM5S20AHE3_A/I can protect industrial motor drive gate driver supplies (typically 15–24V rails) against voltage spikes from inductive kickback, but only if the clamp voltage (32.4V max) is acceptable for the gate drivers used (e.g., IR2110, UCC21520). Risk arises when downstream ICs have absolute max ratings near 35V—clamp leakage may degrade performance or cause latent failure. For robust design, add a secondary protection scheme like a Zener clamp or crowbar if sustained overvoltage is expected. Also, verify that the SM5S20AHE3_A/I’s 175°C max junction temperature is not exceeded during repetitive fault events. Monitor for parametric drift in long-term operation due to cumulative stress, even within datasheet limits.
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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.
SM5S20AHE3_A/I CAD Models
Vishay General Semiconductor - Diodes Division SM5S20AHE3_A/I PCB symbols & footprints
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