The TP48-4-I-NDI is a high-reliability surge protection device designed for industrial process control systems. It provides effective transient overvoltage and surge protection for 4-wire field transmitters, instruments, and control loops. Built for harsh industrial environments and hazardous area applications, this SPD ensures stable signal transmission, prevents equipment damage, and reduces unexpected downtime in oil & gas, petrochemical, power, and automation systems.

• 4-wire surge protection for process transmitters and field instruments
• Rugged construction for long-term use in demanding industrial environments
• Intrinsically safe design suitable for hazardous locations
• Compact size for easy installation and space-saving layout
• Low insertion loss with no negative impact on signal quality
• Standard 1/2" NPT mounting for convenient on-site installation
• High surge immunity and excellent interference suppression
• Complies with international industrial safety and performance standards
• Stable performance and long service life

• Model: TP48-4-I-NDI
• Protection Type: Surge & transient overvoltage protection
• Wiring Configuration: 4-wire
• Mounting: 1/2" NPT
• Application: Field transmitters, control loops, instrumentation systems
• Design: Intrinsically safe for industrial hazardous areas
• Environment: Suitable for harsh on-site industrial conditions

• Oil and gas production facilities
• Petrochemical and chemical plants
• Power generation and distribution systems
• Industrial automation and process control
• Water treatment and utility infrastructure
• Mining and heavy industry
• Hazardous area instrumentation systems

The Crouse-Hinds series MTL TP48 surge protection device safeguards field-mounted process transmitters where it matters, right at the unit. After a simple installation (the TP48 screws into an unused conduit entry, with no additional modification), it provides high-level protection against surges and transients while normal operation remains unaffected.

The TP48 resets itself automatically after each operation. The device is available with screw threads to suit different transmitters, with explosion-proof and intrinsically safe options for hazardous areas. Working voltage is 48V dc maximum with impulse ratings of 10kA peak current and 10kV peak voltage.

Approvals for intrinsically safe, flameproof, explosion-proof and non-incendive operation are available, in all gas groups and apparatus temperature classifications up to T6. For Functional Safety applications TP24/7 surge protection devices can be considered as wiring components that pass the process signals without alteration. Information is provided in the Functional Safety manual to assist in the selection and application of MTL surge protection devices for instrumentation signals that are being used to provide functional safety according to the latest IEC 61508 and IEC 61511 standards.

TP48-N-NDI, TP48-I-NDI, TP48-G-NDI, TP48-3-N-NDI, TP48-3-I-NDI, TP48-3-G-NDI, TP48-4-N-NDI, TP48-4-I-NDI, TP48-4-G-NDI