TP48-3-I-NDI DIN Rail Mount 48V DC 3-Wire Intrinsically Safe Surge Protection Device for Industrial Transmitters

The TP48-3-I-NDI is a high-performance surge protection device (SPD) from the Eaton Crouse-Hinds series MTL TP48 range, specifically engineered to safeguard 3-wire field-mounted process transmitters from damaging voltage transients and lightning-induced surges.

Unlike conventional surge protectors that require complex wiring or conduit modifications, the TP48-3-I-NDI installs with unprecedented simplicity — it screws directly into an unused conduit entry of the transmitter, providing robust protection without affecting normal operation. The device resets automatically after each surge event, ensuring continuous, maintenance-free protection.

With ATEX certification for hazardous area installations, the TP48-3-I-NDI is the trusted choice for oil & gas platforms, chemical plants, pharmaceutical facilities, and other explosive atmospheres.

The "NDI" suffix indicates full hazardous area certification (ATEX/IECEx), while non-NDI versions are for general-purpose applications.

• Direct Transmitter Mounting: Simply screws into an unused conduit entry — no additional wiring, conduit modifications, or expensive extras required
• 3-Wire Protection: Specifically designed for 3-wire field-mounted transmitters, providing complete protection for power, signal, and return lines
• Hazardous Area Certified: ATEX, IECEx, and other international approvals for use in potentially explosive atmospheres (Gas Groups IIA, IIB, IIC; Temperature Class T6)
• High Surge Capacity: Handles impulse ratings of 10kA peak current (8/20µs) and 10kV peak voltage — far exceeding optional transient protection from transmitter manufacturers
• Automatic Reset: Self-resetting after each surge event — no manual intervention or replacement required
• No Signal Degradation: Low impedance design introduces negligible resistance into the loop, preserving signal integrity
• Rugged 316 Stainless Steel Housing: Built to withstand harsh industrial environments, including offshore and marine applications
• 10-Year "No Fuss" Warranty: Backed by Eaton MTL's industry-leading warranty

The TP48-3-I-NDI is specifically designed to protect critical process instrumentation in demanding environments:

Suitable for protecting 3-wire transmitters measuring pressure, temperature, level, flow, and pH.

Contact our sales team for volume pricing, datasheet downloads, or technical application support.

Suitable for use in SIL-rated loops per IEC 61508/61511