The MTL TP48 Series Protector is designed to safeguard field-operated instruments without requiring any modifications to the instruments. Simply screw the TP48 directly onto their unused incoming wire holes. While providing comprehensive protection, it does not interfere with normal operations and automatically restores once the surge is discharged. To accommodate different transmitters, the TP48 comes in various thread hole diameters, with intrinsically safe and explosion-proof models suitable for use in hazardous areas.

TP48 Two-Wire Series

• Simple and direct installation by screwing onto the instrument's unused incoming wire hole

• Offers intrinsically safe and explosion-proof certified models with FM, CSA, ATEX approvals

• Operates at 48VDC

• Up to 10KA (8/20μs) surge withstand capability

TP-P Series

• Also provides in-series models for field devices with only wiring ports.

TP48/3, TP48/4 Series

• The TP48/3 and TP48/4 feature a unique design that adopts the widely accepted TP48 two-wire series model, offering a simple and feasible solution for protecting three-wire and four-wire field instruments.

• Comes in various thread hole diameters to suit different transmitters

• Specially designed for three-wire and four-wire field instrument protection

• Offers intrinsically safe and explosion-proof certified models with FM, CSA, ATEX approvals

• Up to 10KA (8/20μs) surge withstand capability

TP32 & TP32-T (with Built-in Bus Terminator)

• The TP32 is specifically designed to protect fieldbus-based devices, capable of withstanding surge currents up to 10KA, with certifications allowing use in various hazardous locations.

• Designed for fieldbus protection, complying with IEC61158-2, 2000 and ANSI/ISA-50, 02-2 1992 standards

• The TP32-T provides both surge protection and bus terminator functionality

• Simple and direct installation by screwing onto the instrument's unused incoming wire hole

• Offers intrinsically safe and explosion-proof certified models with FM, CSA, ATEX approvals

• Suitable for parallel connection in electrical circuits

TP24/7 Series

• The TP24/7 boasts a unique design that safeguards field instruments with two distinct signal loops (simultaneously providing straightforward protection for a 24VDC power supply loop and an RS485 communication loop).

• Specially designed for field instrument protection with different loop signal characteristics

• Offers intrinsically safe and explosion-proof certified models with FM, CSA, ATEX approvals

• Provides protection for both a 24V and a 7V signal loop

• Up to 10KA (8/20μs) surge withstand capability

In-Stock Models of TP Series Field Surge Protectors:

　　TP24/7-G;TP24/7-G-NDI;TP24/7-I;TP24/7-I-NDI;TP24/7-N;TP24/7-N-NDI

　　TP48-3-G;TP48-3-G-NDI;TP48-3-I;TP48-3-I-NDI;TP48-3-N;TP48-3-N-NDI

　　TP48-4-G;TP48-4-G-NDI;TP48-4-I;TP48-4-I-NDI;TP48-4-N;TP48-4-N-NDI

　　TP48-G;TP48-G-NDI;TP48-I;TP48-I-NDI;TP48-N;TP48-N-NDI

　　TP32-G;TP32-G-NDI;TP32-I

　　TP-ACFF-N;TP-AC420-N;TP-AC485-N;TP-ACSFF-N;TP-ACS420-N;TP-ACS485-N

　　TP48-N Non-certified SPD - 1/2” NPT thread

　　TP48-I Non-certified SPD - 20mm ISO thread

　　TP48-G Non-certified SPD - G 1/2” (BSP 1/2 inch)

　　TP48-3-N Non-certified SPD - 1/2” NPT thread

　　TP48-3-I Non-certified SPD - 20mm ISO thread

　　TP48-3-G Non-certified SPD - G 1/2” BSP 1/2 inch

　　TP48-4-N Non-certified SPD - 1/2” NPT thread

　　TP48-4-I Non-certified SPD - 20mm ISO thread

　　TP48-4-G Non-certified SPD - G 1/2” BSP 1/2 inch

　　TP48-N-NDI Certified SPD - 1/2” NPT thread

　　TP48-I-NDI Certified SPD - 20mm ISO thread

　　TP48-G-NDI Certified SPD - G 1/2” (BSP 1/2 inch)

　　TP48-3-N-NDI Certified SPD - 1/2” NPT thread

　　TP48-3-I-NDI Certified SPD - 20mm ISO thread

　　TP48-3-G-NDI Certified SPD - 20mm ISO thread

　　TP48-4-N-NDI Certified SPD - 1/2” NPT thread

　　TP48-4-I-NDI Certified SPD - 20mm ISO thread

　　TP48-4-G-NDI Certified SPD - G 1/2” - BSP 1/2 inch

　　MTL TP32 series surge protective device model sharing

　　TP32-N TP32-T-N 1/2” NPT thread

　　TP32-N-NDI TP32-T-N-NDI 1/2” NPT thread, with EEx ia, EEx d, approval

　　TP32-I TP32-T-I 20mm ISO thread

　　TP32-I-NDI TP32-T-I-NDI 20mm ISO thread, with EEx ia, EEx d, approval

　　TP32-G TP32-T-G G 1/2” (BSP 1/2 inch)

　　TP32-G-NDI TP32-T-G-NDI G 1/2” (BSP 1/2 inch), with EEx ia, EEx d, approval

　　MTL TP24 series surge protective device model sharing

　　TP24/7-N-NDI Certified process transmitter surge protection device - 1/2” NPT thread

　　TP24/7-I-NDI Certified process transmitter surge protection device - 20mm ISO thread

　　TP24/7-G-NDI Certified process transmitter surge protection device - G 1/2” (BSP 1/2”)

　　TP24/7-N Non-certified process transmitter surge protection device - 1/2” NPT thread

　　TP24/7-I Non-certified process transmitter surge protection device - 20mm ISO thread

　　TP24/7-G

　　TP24/7 All

　　TP24/7-X-NDI

　　TP24/7-T-XNDI

　　MTL TP series surge protective device model sharing

　　TP-ACFF-N AC power & Foundation Fieldbus 1/2” NPT Thread

　　TP-ACFF-I AC power & Foundation Fieldbus 20mm ISO Thread

　　TP-AC420-N AC power & 4-20mA 1/2” NPT Thread

　　TP-AC420-I AC power & 4-20mA 20mm ISO Thread

　　TP-AC485-N AC power & Profibus DP (RS485) 1/2” NPT Thread

　　TP-AC485-I AC power & Profibus DP (RS485) 20mm ISO Thread

　　MTL TP32 series surge protective device model sharing

　　TP-P32-N-NDI Certified process transmitter surge protection device - 1/2” NPT thread

　　TP-P32-I-NDI Certified process transmitter surge protection device - 20mm ISO thread

　　TP-P32-G-NDI Certified process transmitter surge protection device - G 1/2” (BSP 1/2")

　　TP-P32-N Non-certified process transmitter surge protection device - 1/2” NPT thread

　　TP-P32-I Non-certified process transmitter surge protection device - 20mm ISO thread

　　TP-P32-G Non-certified process transmitter surge protection device - G 1/2” (BSP 1/2")

　　MTL TP48 series surge protective device model sharing

　　TP-P48-N-NDI Certified process transmitter surge protection device - 1/2” NPT thread

　　TP-P48-I-NDI Certified process transmitter surge protection device - 20mm ISO thread

　　TP-P48-G-NDI Certified process transmitter surge protection device - G 1/2” (BSP 1/2")

　　TP-P48-N Non-certified process transmitter surge protection device - 1/2” NPT thread

　　TP-P48-I Non-certified process transmitter surge protection device - 20mm ISO thread

　　TP-P48-G Non-certified process transmitter surge protection device - G 1/2” (BSP 1/2")

　　TS10-P 10 pair protection for PSTN applications

　　TS10-I 10 pair protection for ISDN or private wire applications