Engines and turbines
GRT serves engine and exhaust sensors; PRG serves engines and gas turbines. PPH25M connects thermocouples for engine and turbine temperature measurement.
Connectors for Engines, Furnaces and High-Temperature Zones
Near engines, turbines, exhausts and furnaces, standard insulation and contact springs fail. High-temperature connectors use glass or ceramic insulation and stainless-steel shells.
GRT connectors run to +500 °C, PRG to +400 °C and J599 Series III MT to +260 °C; PPH25M thermocouple connectors carry temperature signals without adding error.
At a glance
- +500 °C
GRT, with models rated 500, 350 or 300 °C
- +400 °C
PRG standard layouts; +350 °C for the 25 / 50 A version
- 260 °C
J599 Series III MT high-temperature version
- 4 to 47
PPH25M thermocouple contacts in chromel, alumel and nickel-copper
Where they are used
Furnaces and kilns
GRT serves industrial furnaces and kilns, while PRG serves furnaces and heat treatment. PPH25M carries thermocouple signals for furnace and kiln measurements.
Test rigs and process temperature
GRT and PRG serve high-temperature test rigs. PPH25M serves test benches, data acquisition and process temperature monitoring; J599 Series III also offers thermocouple contacts.
What the connectors must handle
Temperature class
GRT runs to +500 °C, PRG to +400 °C and J599 Series III MT to 260 °C.
Current at temperature
PRG standard layouts carry 7–10 A to +400 °C; its 25 A and 50 A contacts run to +350 °C. GRT carries 7.5–13 A.
Finish and seal
J599 Series III runs from −65 to +200 °C, to +175 °C with cadmium and T finishes, and to 260 °C in the MT version.
Thermocouple contacts
PPH25M matches chromel, alumel and nickel-copper contacts to the thermocouple legs in 4 to 47 positions, rated +200 °C for ≥ 600 h; PPH25AM is rated +150 °C for ≥ 1000 h.
Compare the series
High-temperature and thermocouple interfaces
Swipe left or right to see all columns.
| Series | Temperature | Contact configuration | Current or contact material | Construction or interface | Datasheet |
|---|---|---|---|---|---|
| GRT | −55 to +500 °C (by model) | 2 to 5 | 7.5–13 A | Hermetic receptacles | PDF, 188 KB |
| PRG | −60 to +400 °C; +350 °C for 25 / 50 A version | 2 to 47 | 7–10 A (25 / 50 A version) | Threaded, shells 20–60 | PDF, 198 KB |
| PPH25M | +200 °C ≥ 600 h (PPH25M) / +150 °C ≥ 1000 h (PPH25AM) | 4 to 47 | Chromel, alumel, nickel-copper | Threaded, M24 to M64 | PDF, 170 KB |
| J599 Series III | −65 to +200 °C; 260 °C MT version | 184 insert arrangements | 26 to 10 (2–33 A) | Triple-start thread | PDF, 339 KB |
How to choose
Describe the temperature profile
Give continuous and peak temperature, time at peak, thermal cycling and vibration at temperature.
Identify circuits and alloys
Separate power, signal and thermocouple circuits; for thermocouples, give the type and each leg alloy. Matched alloys add no thermoelectric junction at the connector.
Choose construction and sealing
GRT uses stainless-steel shells and glass-insulated receptacles, and its hermetic versions are tested at 0.1 MPa. Give the interface and mounting dimensions.
Define cable and exit
Give the cable type and pin-out; PRG offers straight or 90° backshells, shielded or unshielded. We will review your project.
Recommended series
GRT High-Temperature Connectors, up to +500 °C
−55 to +500 °C · stainless steel · hermetic receptacles
PRG High-Temperature Circular Connectors, up to +400 °C
Up to +400 °C · 2 to 47 contacts · shielded or unshielded
PPH25M Thermocouple Connectors with Compensating Contacts
Chromel / alumel contacts · 4 to 47 contacts · −60 to +200 °C
J599 Series III Circular Connectors (38999 Series III Type)
38999 Series III type · shell sizes 9–25 · 184 insert arrangements
All series can be customized — contact counts, cable lengths, materials and finishes.
Related guides
Selecting Connectors for High-Temperature Zones
How insulation, contact and shell materials limit connector temperature, and how to choose between 200 °C, 260 °C, 400 °C and 500 °C connectors.
Thermocouple Connectors and Compensating Contacts
Why copper contacts add error to thermocouple circuits, how chromel, alumel and compensating-alloy contacts fix it, and how to specify them.
FAQ
How hot can GRT connectors run?
Up to +500 °C. GRT is built to order, with models rated 500, 350 or 300 °C; send your temperature profile and drawing.
What current does PRG carry at high temperature?
PRG standard layouts carry 7–10 A to +400 °C; its 25 A and 50 A contacts run to +350 °C.
Which 38999-type connector handles 260 °C?
J599 Series III in the MT high-temperature version.
Why use thermocouple contacts in the connector?
Contacts matched to each thermocouple leg add no thermoelectric junction. PPH25M offers chromel, alumel and nickel-copper contacts in 4 to 47 positions.
What should I send for a high-temperature inquiry?
Send continuous and peak temperature, time at peak, vibration, sealing, cable and pin-out, and we will review your project.
From sample to production
Send your requirements
Part number, drawing, pin-out or a short description of your application.
Configuration and quote
Our engineers match the configuration and reply with a drawing and quotation.
Samples
Samples are built to order. The minimum order quantity is 10 pieces, and samples and production orders each take 4–8 weeks. Third-party testing to your specification is available on request.
Your approval
You test the samples in your own equipment and approve them.
Series production
Production follows the approved sample configuration, with machining, molding, plating and assembly in our own Shenyang factory.
Need a quote or a drawing?
Send your part number, pin-out or drawing. Every inquiry is acknowledged by email within 1 business day, and an engineer follows up with a matched configuration, drawing or quotation.