Description
Unboxing & Hardware Overview
- Manufacturer & Brand: MTL / Eaton (Crouse-Hinds series)
NEX Instrument Inc+ 1
- Part Number / Model: SD07X (Part of the ultra-slim SDX low-resistance range)
Chirico Scientific
- Product Type: Low-Resistance Surge Protection Device (SPD) / Transient Overvoltage Suppressor
CW GREEN TECH
- Physical Dimensions: Ultra-slim space-saving modular form factor (approx. 7mm width) designed for standard DIN-rail mounting
Farnell
- Estimated Shipping Weight: ~0.375 lbs (0.17 kg) packaged with protective anti-static materials
- Primary Condition Status: Factory New / New Surplus / Refurbished Tested options available (verify specific lot status with provider prior to dispatch)
Product Introduction
The MTL SD07X is an ultra-slim, high-density surge protection device engineered to safeguard sensitive low-voltage process control equipment, instrumentation I/O, and communication lines. Part of MTL’s renowned SD range, the “X” variant denotes a low-resistance design optimized for applications where loop resistance must be kept minimal—such as with certain RTDs, low-voltage transducers, ac sensors, microphones, and turbine flowmeters.
Using advanced multi-stage hybrid protection circuitry, the SD07X clamps incoming transient overvoltages caused by lightning strikes or heavy industrial switching, safely diverting surge currents to earth without disrupting normal signal transmission.
Core Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | SD07X |
| Nominal Operating Voltage (Vdc / Vac) | 7 VDC / 5 VAC |
| Max Discharge Current (Imax) | Up to 20 kA (maximum surge current capability via hybrid staging) |
| Response Time | < 1 nanosecond |
| Mounting Type | T-section DIN-rail (35 x 7.5mm or 35 x 15mm rails) |
| Maximum Current / Load | Low resistance configuration tailored for sensitive loops |
| Operating Temperature | -40°C to +70°C (-40°F to 158°F) |
| Storage Temperature | -40°C to +80°C (-40°F to 176°F) |
| Relative Humidity | 5% to 95% non-condensing |
Compliance & Standards Alignment
- Designed to meet international industrial immunity and surge protection guidelines for instrumentation and control loops.
- Can be implemented as “simple apparatus” in hazardous area loops when installed correctly, maintaining intrinsic safety parameters without disrupting system certification.
measuring instruments
Technical Note: Unlike standard SD models that include a fused disconnect feature, the SD07X is a non-fused, low-resistance variant designed specifically to preserve signal accuracy in loops sensitive to series resistance.
Farnell
Storage & Asset Preservation Guidelines
- Keep the surge protector sealed inside its original anti-static packaging to protect internal solid-state suppression elements from dust and moisture.
- Store in a temperature-controlled environment with relative humidity maintained strictly below 60%.
- Avoid dropping or exposing the module to heavy mechanical shock prior to deployment.
Physical Installation Prerequisites
- Ensure the instrumentation loop is powered down or follow plant safety procedures before installing or swapping protection modules.
- Snap the device directly onto a grounded top-hat DIN-rail; the module features an automatic earthing foot that establishes a low-impedance ground connection upon mounting.
- Verify that field signal lines and protected equipment lines are mapped correctly to the designated input/output terminals.
Buyer’s FAQ & Logistics
Q: What Harmonized System (HS) code applies to surge protection devices?
A: Electrical surge suppressors and voltage limiters typically classify under HS codes 8536.30 (apparatus for protecting electrical circuits) or 8538.90. Confirm final classification parameters with your licensed customs broker.
Q: Does the SD07X require maintenance after absorbing a surge?
A: The hybrid protection circuitry utilizes auto-resetting components for typical minor transients, but severe direct strikes may necessitate module replacement if internal components latch or open. Check device status diagnostics if loop signal drops.
Q: Is the listed online price final for procurement?
A: Note: Price is subject to market conditions and available surplus inventory levels; contact our technical sales desk for a formal, time-sensitive quotation.
