Product Summary

The MTL SD32X is a high-integrity surge protection device for critical instrumentation loops. This module protects sensitive equipment from damaging voltage transients. It features a very low series resistance of just 2.2 Ohms per line. This low resistance minimizes signal degradation in your 4-20mA loop. The device handles a nominal voltage of 32Vdc or 22Vac without issue.

Expert Technical Evaluation & Performance Review

Understanding the Low Resistance Advantage

The SD32X offers a unique benefit with its exceptionally low series resistance. At only 2.2 Ohms per line, this component introduces minimal impedance into your circuit. This feature is critical for maintaining signal accuracy over long cable runs. Standard surge protectors often add significant resistance that degrades measurement signals. The SD32X solves this problem for high-precision industrial applications.

Key Electrical Performance Metrics

Engineers require precise data for system design and the SD32X delivers it. The device offers a nominal current rating of 400 milliamps for continuous operation. Its voltage protection level (Up) is less than 45 volts at 1kV/µs. The residual voltage at Isn is only 60 volts, ensuring fast clamping. Maximum leakage current remains extremely low at just 5 microamps. These specifications ensure the SPD does not interfere with normal operations.

Mechanical Dimensions and Mounting

Space is often at a premium inside a control cabinet or junction box. The SD32X boasts a compact footprint for easy installation in tight spots. The dimensions are just 0.7cm by 9.9cm by 10.21cm in size. The total weight of this robust unit is only 0.07 kilograms. This lightweight design simplifies mounting on a standard DIN rail. You can integrate this protection into existing panels without any major modifications.

Bandwidth and Frequency Response

This surge protector also maintains signal integrity for non-DC applications. It provides a bandwidth of 25 kHz for passing AC signals cleanly. This bandwidth allows the device to protect 4-20mA loops and some transmitters. It ensures high-frequency noise does not cause false readings in your process. The component filters out dangerous spikes while letting your data through.

Operational Voltage and Safety Margins

The SD32X operates with a nominal voltage of 32Vdc or 22Vac for standard loops. Its rated voltage (MCOV) is 36 volts, providing a safe operating margin. This margin prevents the SPD from clipping normal voltage signals during operation. The device uses this headroom to avoid premature failure or nuisance shutdowns. This design ensures long-term reliability in fluctuating power environments.

Logistics & Standard Packaging Details

• One MTL SD32X Surge Protection Device
• Product documentation and installation guide
• Individual protective packaging for safe transit
• Express delivery shipping is available via FedEx, UPS, and DHL.