High Temperature Plugs For Critical Heat Resistant Applications
Published 05 Apr 2017

Plugs Sockets Connectors Decontactors | Distributed in UK by Thorne & Derrick
High Temperature Plugs
Marechal metal connectors and plugs provide high temperature distribution of power, signal and control circuits from 240°C to 400°C with 30A-90A rated power currents – contact us for support on specifying and ordering the correct Marechal connectors where high temperatures preclude use of standard plastic type plugs.
Applications for high temperature plugs include:
- Iron & Steel Industry
- Plug Outlets For Electric Ovens & Motors
- Thermal Processing Industries
- Hazardous Area Industries – Oil, Gas & Petrochem

Marechal plugs withstand high temperatures and provide power supply to ovens and electromagnets in the steel industry – industrial power applications also include mobile cranes, cold rolling mills (DN20C) and motors on conveyors (DS3).
The Marechal PNHT and DSHT high temperature plugs, power connectors, signal and control connectors manufactured from metal provide excellent electrical connection quality in high temperature industries.
High Temperature PLUGS & Connectors
Marechal PNHT & DSHT
Performance Comparison PNHT v DSHT
Maximum Operating Temperature Steady | 240ºC | 240ºC / 400ºC (2h) |
Rated Current ln | 30A | 90A |
Umax | 500V | 690V |
Maximum Number of Contacts | 3P+N+E | 3P+E |
Ingress Protection | IP44 | IP66 |
Robustness | IK09 | IK09 |
Flexible Wiring (Min-Max) | 1mm² – 6mm² | Armoured and unarmoured flexible cables from 10mm² up to 95mm² via terminals box side and 6mm², 16mm² & 35mm² via crimping contacts plug side |
Stranded Wiring (Min-Max) | 1.5mm² – 10mm² |
Marechal PNHT High Temperature Plugs
240° Celsius 30 Amp 500V
âž¡ Further information Marechal PNHT
Voltage 50Hz | Polarity | Marechal Socket Outlet (Female) Part Number 240ºC | Marechal Inlet (Male) Part Number 240ºC |
20-24V | 2P | 092408A185 | 092808A185 |
190-230V | 3P+E | 0924033185 | 0928033185 |
220-250V | 1P+N+E | 0924015185 | 0928015185 |
380-440V | 3P+E | 0924013185 | 0928013185 |
380-440V | 3P+N+E | 0924017185 | 0928017185 |

Marechal PNHT
Marechal DSHT High Temperature Plugs
240° – 400° Celsius 90 Amp 380-400V
âž¡ Further information Marechal DSHT
Voltage 50Hz | Polarity | Marechal Wall Mounting Socket Part Number | Marechal Plug Part Number |
380-440V | 3P+E | 3934013Zxxxx | 3938013Zxxxx |

High Temperature Plugs For All Industries
Autoclaves
What Are Autoclaves?
Autoclaves are strong heated containers used for chemical reactions and other processes using high temperatures and pressures.
Autoclaves are used throughout the worldwide thermal processing and bonding industries – this includes aerospace, military, composites, ballistics, glass and nuclear industries for vulcanizing, wood treatment and concrete curing. T&D can support the autoclave manufacturing industry with power plugs and connectors capable of withstanding heat and high temperatures up to 400°C.
The nuclear fuels industry uses autoclaves to prevent the accidental emission of gaseous UF6 (uranium hexafluoride) during feeding, delivery, and sampling operations.
- What The Worlds Largest Autoclave (2321 Cubic Metres)
- Who ASC Process Systems
- Where United States Of America
- When 2006

Images: Boeing & ACS
In August 2006 ASC Process Systems (USA) announced it had built an autoclave with an internal volume of 2,321 m³ (82,000 ft³) – designed to process components of the Boeing 787 Dreamliner passenger aircraft by subjecting them to high temperatures of up to 232° C (450° F) and pressures of up to 10.2 bar.
Untying The Knot
Let’s try to disentangle terminology.
Marechal DO NOT manufacture plugs and sockets.
Well they do and they don’t. Let’s explain.
Their patented Decontactor is effectively a plug with a socket plus an integral load make/break switch. All in one.
Entirely electrically safe.
Marechal Decontactors require no “hard-wiring” like conventional or some may say “good old fashioned plugs”. See the anatomy of the Decontactor and give us a call to discuss your power requirements today.
Talk to T&D, where 21st century challenges meet 21st century solutions.

When Is a Plug Not A Plug – When It’s A Decontactor
Fire Resistant Enclosures
T&D specialise in the specification and supply of harsh and hazardous area equipment where extreme operating conditions apply âž¡ read our Blog: Fire Resistant Enclosures PH120 Pre-Assembled With Ceramic Terminal Blocks.
More Marechal
- Marechal EVO | The First Plug, Switch & Disconnector Combined to Provide 3-in-1 Power Connections
- Self Eject! Stay Safe From Shock With Marechal Electric Plugs
- Marechal – The Decontactor. Maximum Efficiency, Safety & Reliability For Your Power Supply

Plugs | Sockets | Decontactors | Connectors | ATEX IECEx | Explosion Proof
EXPERTS IN EQUIPMENT FOR EXPLOSIVE ATMOSPHERES
leaders in ATEX Innovation To The Hazardous Area Industries
Thorne & Derrick are leaders in the development and distribution of Product Innovations that deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries.
Your proactive problem solvers experienced in succession planning for the replacement of obsolete, non-conformant and legacy equipment in hazardous areas.
Your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, HVAC & Process Instrumentation Equipment to UK and international projects.
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Further Reading
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High Temperature Plugs Connectors – Marechal DSHT Size: 195.34 KB
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High Temperature Plugs Connectors – Marechal PNHT Size: 195.35 KB