SD32T3 3-Terminal Surge Protection | Honeywell Industrial SPD
Manufacturer: Honeywell
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Part Number: SD32T3
Condition：New with Original Package
Product Type: Surge Protection Device (SPD)
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Description
The MTL SD32T3 is a three-wire surge protection device from Honeywell’s MTL SD Modular Series, designed to safeguard sensitive instrumentation and control signals from transient overvoltages. It is engineered specifically for three-wire process transmitters such as pressure sensors, temperature probes, and other low-power industrial devices.
This module features hybrid surge protection for all three wires, providing balanced and effective defense against electrical disturbances caused by lightning strikes, switching transients, or industrial noise. Its ultra-slim 7 mm housing enables high packing density in control panels, while DIN rail mounting allows for quick and secure installation. Moreover, the SD32T3 includes LED diagnostics and a “make-before-break” hot-swap capability, ensuring signal continuity during maintenance.
Backwards compatibility with earlier MTL SD models allows easy upgrades without reconfiguring wiring. The device is ATEX and IECEx certified, suitable for hazardous areas, and meets SIL 3 standards, making it ideal for critical industrial applications in chemical, oil & gas, and manufacturing environments.
Technical Specifications
| Specification | Details |
|---|---|
| Model Number | SD32T3 |
| Product Type | Surge Protection Device (SPD) |
| Application | Three-wire process transmitters |
| Nominal Voltage | 32 V |
| Maximum Surge Current | 15 kA (8/20 µs waveform) |
| Connection Type | Screw terminals |
| Mounting Type | DIN rail |
| Housing Width | 7 mm |
| Protection Mode | All three wires protected via hybrid circuitry |
| Diagnostics | LED indicator for fault detection |
| Hot-Swap Feature | Make-before-break ensures continuity during replacement |
| Certifications | ATEX, IECEx, SIL3 compliant |
| Operating Temperature | –40°C to +85°C |
| Weight | 0.07 kg |
FAQ
Q1: Can the SD32T3 protect three-wire transmitters?
Yes, it provides hybrid surge protection for all three wires of the transmitter.
Q2: What certifications does the device hold?
It is ATEX, IECEx certified and SIL 3 compliant for hazardous-area use.
Q3: How is the module installed?
The SD32T3 mounts easily on a DIN rail, supporting compact and secure installations.
Q4: Does it support hot-swapping?
Yes, the “make-before-break” design maintains signal continuity during replacement.
Q5: What is the expected lifespan of this device?
The module comes with a 10-year warranty, reflecting its high reliability.