May 18, 2025
491
In an era where sensitive electronics face increasing threats from voltage transients, the SMAJ8.0CAHE3_A/H bidirectional TVS diode from Vishay General Semiconductor emerges as a reliable solution. This AEC-Q101 qualified component combines 400W peak pulse power with a ultra-fast response time, making it ideal for automotive and industrial applications. With the surge protection market projected to grow at 6.8% CAGR (2023-2030, MarketsandMarkets), engineers need components that balance performance with compliance. Discover how this DO-214AC (SMA) packaged diode addresses modern design challenges.
The SMAJ8.0CAHE3_A/H belongs to Vishay's TransZorb® series, offering:
Bidirectional ESD/surge protection (8V standoff, 13.6V clamping)
400W peak power dissipation (10/1000µs waveform)
Automotive-grade reliability (-55°C to 150°C operating range)
| Parameter | Value | Standard |
|---|---|---|
| Reverse Standoff Voltage | 8V (Typ) | IEC 61000-4-5 |
| Breakdown Voltage (Min) | 8.89V | MIL-STD-750 |
| Clamping Voltage @ 29.4A | 13.6V (Max) | IEC 61643-321 |
| Peak Pulse Current | 29.4A (10/1000µs) | ISO 7637-2 |
| Operating Temperature | -55°C to +150°C | AEC-Q101 |
Automotive Systems: Meets ISO 16750-2 pulse requirements for 12V systems
Fast Response Needs: <1ns reaction time for ESD protection (IEC 61000-4-2)
Space-Constrained Designs: SMA package (2.5mm height) suits high-density PCBs
| Model | Standoff Voltage | Clamping Voltage | Package | Key Difference |
|---|---|---|---|---|
| SMAJ8.0CAHE3_A/H | 8V | 13.6V | DO-214AC | Automotive-grade (AEC-Q101) |
| SMAJ8.0A | 8V | 14.5V | DO-214AC | Higher clamping, non-automotive |
| P6KE8.0CA | 8V | 12.4V | DO-15 | Lower profile but reduced power |
Used in engine control units to protect CAN bus lines from ISO 7637-2 pulses (Pulse 1: -100V/50Ω).
Shields 4-20mA signal lines in PLC systems from inductive load switching transients.
The global TVS diode market is driven by:
Expansion of automotive electronics (48% of 2022 demand, Yole Développement)
5G infrastructure requiring robust ESD protection (IEC 61000-4-2 Level 4)
Increasing adoption in consumer IoT devices
Emerging requirements include:
Higher power density for 48V automotive systems
Integration with EMI filters in single packages
Enhanced thermal performance for ADAS applications
A: Bidirectional types (like SMAJ8.0CAHE3_A/H) protect against both positive and negative transients, while unidirectional only guards one polarity.
A: TVS diodes offer faster response (<1ns vs MOV's 5-50ns) but lower energy absorption capability.
A: Yes, with proper circuit design. The 29.4A peak current rating exceeds Pulse 5a's 22A requirement.
A: Yes, the glass passivated junction supports acrylic, silicone, and urethane coatings per IPC-CC-830.
A: Rated for 100+ surges at full 29.4A current when kept within TJ limits.
The SMAJ8.0CAHE3_A/H sets the benchmark for compact surge protection in harsh environments. Its automotive qualification and robust electrical characteristics make it particularly valuable for next-generation vehicle electronics and industrial IoT applications.
For pricing and availability, contact Vishay authorized distributor: [email protected]
