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3-Prong Standard Size Thermocouple, RTD, & Thermistor Connectors

3-Prong Standard Size Round Pin Connector for Thermocouple, RTD and 3-Wire Thermistor

$9.58

Item# OTP-R/SI-F

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-9 $9.58
10-49 $9.10
50-99 $8.62
100-999 $8.14
1000-4999 $7.66
5000+ $7.19

In stock

Lead Time (If not in stock): 3 weeks
3-Prong Standard Size Round Pin Connector for Thermocouple, RTD and 3-Wire Thermistor OTP-R/SI-F OTP-R/SI-F
  • 3 Prong / Pin Standard Design
  • Thermocouple Color Coded ANSI
  • White Uncompensated Available
  • Glass Filled Nylon Rated to 425 F
  • Appearance of “Omega” Logo may vary; it may be stamped onto or molded into connector.

OTP-R/SI-F Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Sensing Type
Thermocouple Calibration Type
Connector Gender
Calibration Standard
RoHS Compliant
Additional Features
Connector Style
Temperature Unit
Temperature Min
Temperature Max
Temperature Range
No. of Pins/Sockets


  • Color Code Standard Yes
  • Maximum Ambient Temperature 425°F
  • Wire Type 3 wire

The OTP 3-prong is standard sized with round pins and is available color-coded for thermocouple or white for uncompensated 3 wire and 3 pin TC connectors. These quick disconnect plugs and jacks provide reliable connections between thermocouple, RTD or thermistors and extension wires. The color-coded bodies are molded of high performance glass-reinforced nylon. Tubular plug prongs and collet-type jack inserts have low mass and reduce temperature gradients. Negative prongs and inserts are larger than positives to insure proper polarity upon connection. This is a standard feature on all OMEGA™ connectors. Recommended for most applications requiring three-wire circuits, including shielded thermocouples, thermistors, and RTD's. Especially useful for continuing thermocouple shield leads through panel jacks. Will withstand ambient temperatures to 220°C (425°F). High-impact construction.

For strain relief and other accessories see Related Links below. Appearance of “Omega” logo may vary (it may be stamped onto or molded into the connector).

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Rated 5 out of 5 by from Good Robust Connectors We use these connectors with Panel Mount RTD's and these have proved to make good flawless connections even under vibrating conditions.
Date published: 2022-08-06
Rated 5 out of 5 by from Uncompromised quality Thermocouple connections High quality connectors for thermocouple extensions. I wouldn't expect any less from Omega. The design and quality I have some to expect and get when purchasing thermocouples and connectors.
Date published: 2022-04-01
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is there 3D or STep File we can download

Asked by: joseph231
Hi Joseph231, Thank you for the inquiry. We do not offer 3D or step file for this product. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2022-07-12
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