July 14, 2025
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In today’s automotive and industrial electronics, robust transient voltage protection is non-negotiable. The SM8S15AHE3_A/I from Vishay General Semiconductor stands out as a high-performance unidirectional TVS diode, engineered to safeguard sensitive circuits against voltage spikes with a 24.4V clamping voltage and 270A peak pulse current. AEC-Q101 qualified and capable of operating at up to 175°C, this surface-mount PAR® technology device meets stringent automotive reliability standards. Read on to discover why designers trust this component for ISO7637-2-compliant surge protection.
The SM8S15AHE3_A/I is part of Vishay’s SM8S_A series, designed for surface-mount applications requiring high-temperature stability and surge resilience. Its DO-218AB package ensures efficient power dissipation while maintaining a compact footprint.
| Parameter | Value |
|---|---|
| Working Voltage (VWM) | 15 V |
| Clamping Voltage (VC) | 24.4 V @ 270A |
| Breakdown Voltage (VBR) | 16.7 V |
| Peak Pulse Current (IPP) | 270 A (8/20μs) |
| Peak Pulse Power (PPPP) | 6.6 kW |
| Operating Temperature | -55°C to +175°C |
| Forward Voltage (VF) | 1.8 V |
| Qualification | AEC-Q101 |
When to Choose SM8S15AHE3_A/I:
Automotive Load Dump Protection: Complies with ISO7637-2 for 12V/24V systems.
High-Temperature Environments: Junction temperature up to 175°C.
High Surge Requirements: 6.6kW peak power dissipation.
| Model | VWM | IPP | Package | Key Difference |
|---|---|---|---|---|
| SM8S15AHE3_A/I | 15V | 270A | DO-218AB | AEC-Q101, 175°C |
| SMAJ15A | 15V | 43A | SMA | Lower power, general-purpose |
| 1.5KE15A | 15V | 78.6A | DO-201 | Axial lead, lower cost |
Automotive Electronics: ECU, infotainment systems, LED lighting.
Industrial Controls: PLCs, motor drives.
Telecom: Base station surge protection.
According to MarketsandMarkets, the TVS diode market is projected to grow at a 6.2% CAGR (2023–2028), driven by automotive electrification and 5G infrastructure. Vishay’s PAR® technology positions the SM8S series as a leader in high-reliability segments.
Higher power density in smaller packages (e.g., DFN).
Integration with EMI filters for multi-functional protection.
Increased demand for AEC-Q200 qualified components.
Yes, it meets RoHS and REACH standards (refer to Vishay’s compliance documentation).
Unidirectional (like SM8S15AHE3_A/I) protects against positive surges only; bidirectional guards against both polarities.
TVS diodes offer faster response (<1ns vs. MOV’s ~50ns) and better longevity but at higher cost per watt.
Yes, when paired with appropriate circuit design (verify with application notes).
<1µA at 15V per datasheet (Vishay SM8S_A series specification).
The SM8S15AHE3_A/I combines Vishay’s PAR® technology with automotive-grade reliability, making it ideal for harsh-environment surge protection. With its 6.6kW pulse capability and 175°C operation, it outperforms standard TVS diodes in critical applications.
Contact our sales team for pricing and samples: [email protected]
