Product Description
The MTL Instruments SD55X is a high-performance surge protection device. This SD Series module protects sensitive control systems from voltage transients. It features an ultra-low series resistance of 2.2 ohms per line. This special design minimizes signal degradation in critical data loops. Engineering teams choose this SPD for its ultra-slim 7mm profile. It saves significant space inside dense electrical cabinets. The device provides robust hybrid protection with zero leakage under normal operation. It ensures maximum uptime for industrial automation networks and field instrumentation.
Technical Data
- Brand: MTL Instruments
- Model: SD55X
- Product Series: SD Series
- Product Type: Surge Protection Device (SPD)
- Nominal Voltage (Un): 55 Vdc / 38 Vac
- Nominal Current (In): 400 mA
- Rated Voltage (MCOV Uc): 62 V
- Series Resistance: 2.2 Ohms/line
- Voltage Protection Level (Up): Less than 90 V at 1kV/microsecond
- Residual Voltage: 100 V at nominal current
- Bandwidth Frequency (fG): 25 kHz
- Max Leakage Current: 5 microamps
- Special Feature: Low resistance loop design
- Dimensions: 9.9cm x 0.7cm x 10.96cm
- Weight: 0.07 Kg
Applications and Diagnostics
- Protects 4-20mA process control loops and telemetry systems.
- Safeguards programmable logic controllers and remote telemetry units.
- Secures flowmeters, temperature sensors, and industrial actuators.
- In-line resistance monitoring detects degradation before module failure.
- Low-attenuation design permits precise high-frequency signal transmission.
Compatibility and Certification
- Fits standard top-hat DIN rails for universal cabinet integration.
- Matches major industrial field transmitters and control system inputs.
- Meets international standards for surge suppression and electrical safety.
Installation, Commissioning and Maintenance
- Clip the module directly onto a grounded DIN rail.
- Connect input and output wires to secure screw terminals.
- Perform annual loop resistance checks to verify circuit health.
- Replace the modular unit quickly without disconnecting field wiring.
Shipping, Package and Warranty
- Package includes one factory-sealed MTL SD55X protection module.
- Includes standard 12-month factory warranty against material defects.
- Fast global shipping via FedEx, UPS, and DHL express networks.
Frequently Asked Questions (FAQ)
- Does this module require a separate ground wire? No, it grounds directly through the DIN rail clip.
- Can I use this for AC voltage applications? Yes, it supports AC voltages up to 38 Vac.
- What happens if the unit overloads? The internal fuse protects the control system from catastrophic damage.
Product Resources
Please download the documents below to review full engineering drawings and installation steps:
Contact Information
For technical support or bulk price inquiries, please reach out to our sales team:
- Email Inquiries: info@oiltechcontrols.com
- Phone Support: +86 158 8020 0923
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