7895 SENSATA | Alldatasheet

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www.sensata.com Copyright © 2024 Sensata Technologies, Inc. | 7895 MOTOR THERMOSTATS HERMETICALLY SEALED ON-WINDING Features and Benefits Installation Pilot Circuit Operation Construction

  • Small size and shape permits close coupling to motor windings for increased protection
  • Hermetically sealed enclosure
  • Simple, rugged all-welded construction has one moving part for trouble-free service
  • Klixon ® snap action thermal disc assures positive make and break action controlled temperature differential aid vibration resistance Klixon® 7895 on-winding motor thermostats are designed to protect hermetically-sealed compressor motors from excessive winding temperatures. A positive refrigerant seal combined with small tubular construction allows these thermostats to be installed directly in the motor windings for precise monitoring of winding temperatures. As a result, the compressor manufacturer can choose a thermostat that will allow the motor to be safely rated to its maximum capacity. Maximum heat transfer from the motor windings to the thermostat is the key to optimum performance. In many cases, the total surface of the device can be utilized by inserting its entire length within the stator winding. Good performance is also achieved by lacing the protector to the top of the windings, making sure that the surface of the case is in close contact with the stator windings. The thermostat may be varnished dipped and baked with the entire assembly. The 7895 thermostat is used as a pilot duty control to protect a motor from overheating in a running overload condition. When used alone, it cannot protect against locked rotor since its response time is not fast enough to follow the very rapid temperature rise of the windings. The Klixon ® 8347 and 8348 supplementary overloads with their quick response to locked rotor current, can be used to supplement the 7895 thermostat. These overload devices trip very quickly for the first several cycles, allowing enough time for the heat generated in the windings to reach the thermostat which then takes over as the controlling element. This combination is used to protect both single-phase and three-phase motors. The basic element in the on-winding motor thermostat is the Klixon® snap-acting disc. The electrical circuit consists of the pin, insulated from the case by the glass-to-metal seal, connected to the stationary contact through the disc to the case. In the 7895 thermostat, the metal case is electrically hot and requires some method of insulation from the motor windings. Several custom configurations of insulation and terminations are available at slight additional cost.

www.sensata.com Page 2 Copyright © 2024 Sensata Technologies, Inc. Performance Characteristics Wire Lead Insulations Insulation Sleeve Material Terminations SPECIFICATIONS Operating Temperatures 75°C to 165°C Standard Tolerances ±5ºC open, ±11ºC close Standard Differential 22ºC nominal Special Tolerances ±3ºC open, ±5ºC close Special Differential 17ºC nominal Dacron Mylar Dacron 600V – 105ºC temperature rating – 18 AWG Dacron Teflon Mylar Dacron 600V – 105ºC temperature rating – 20 AWG Teflon 300/600V – 200ºC temperature rating – 22 AWG Teflon 300V – 200ºC temperature rating – 18 AWG Mylar 0.004” thick Mylar Over Teflon 0.007” thick (0.004" Mylar / 0.003" Teflon) Female flag quick connect 1/4” open end terminal for #10 screw, #10 eyelet DIMENSIONS All dimensions are in Inches (mm).

Rev:01/23/24 www.sensata.com CONTACT USSensata Technologies, Inc. (“Sensata”) data sheets are solely intended to assist designers (“Buyers”) who are developing systems that incorporate Sensata products (also referred to herein as “components”). Buyer understands and agrees that Buyer remains responsible for using its independent analysis, evaluation and judgment in designing Buyer’s systems and products. Sensata data sheets have been created using standard laboratory conditions and engineering practices. Sensata has not conducted any testing other than that specifically described in the published documentation for a particular data sheet. Sensata may make corrections, enhancements, improvements and other changes to its data sheets or components without notice. Buyers are authorized to use Sensata data sheets with the Sensata component(s) identified in each particular data sheet. HOWEVER, NO OTHER LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE TO ANY OTHER SENSATA INTELLECTUAL PROPERTY RIGHT, AND NO LICENSE TO ANY THIRD PARTY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT, IS GRANTED HEREIN. SENSATA DATA SHEETS ARE PROVIDED “AS IS”. SENSATA MAKES NO WARRANTIES OR REPRESENTATIONS WITH REGARD TO THE DATA SHEETS OR USE OF THE DATA SHEETS, EXPRESS, IMPLIED OR STATUTORY, INCLUDING ACCURACY OR COMPLETENESS. SENSATA DISCLAIMS ANY WARRANTY OF TITLE AND ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT, QUIET POSSESSION, AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUAL PROPERTY RIGHTS WITH REGARD TO SENSATA DATA SHEETS OR USE THEREOF. All products are sold subject to Sensata’s terms and conditions of sale supplied at www.sensata.com SENSATA ASSUMES NO LIABILITY FOR APPLICATIONS ASSISTANCE OR THE DESIGN OF BUYERS’ PRODUCTS. BUYER ACKNOWLEDGES AND AGREES THAT IT IS SOLELY RESPONSIBLE FOR COMPLIANCE WITH ALL LEGAL, REGULATORY AND SAFETY-RELATED REQUIREMENTS CONCERNING ITS PRODUCTS, AND ANY USE OF SENSATA COMPONENTS IN ITS APPLICATIONS, NOTWITHSTANDING ANY APPLICATIONS-RELATED INFORMATION OR SUPPORT THAT MAY BE PROVIDED BY SENSATA. Mailing Address: Sensata Technologies, Inc., 529 Pleasant Street, Attleboro, MA 02703, USA.Copyright © 2024 Sensata Technologies, Inc. Regional head offices: United States of America Sensata Technologies Attleboro, MA Phone: 508-236-3800 E-mail: support@sensata.com Netherlands Sensata Technologies Holland B.V. Hengelo Phone: +31 74 357 8000 E-mail: support@sensata.com China Sensata Technologies China Co., Ltd. Shanghai Phone: +8621 2306 1500 E-mail:support@sensata.com ORDERING OPTIONS Example : 7895 - XXX - 000 Basic Part Number Physical Characteristics (Including)

Electrical Characteristics

Includes: Lead Specifications Insulating Sleeving Potting, etc. Includes Temperature

7895 XXX 000

To order test samples please supply the following information: 1. Opening temperature 4. Voltage 2. Temperature differential 5. Lead type, size and length 3. Tolerances desired on opening and closing temperatures 6. Insulation required UL

125 VA, 24 VAC

345 VA, 110-600 VAC

(limited to the lead wire voltage rating if less than 600 VAC). AGENCY APPROVALS AND CERTIFICATIONS WARNINGS RISK OF MATERIAL DAMAGE AND HOT ENCLOSURE

  • The product’s side panels may be hot, allow the product to cool before touching
  • Follow proper mounting instructions including torque values
  • Do not allow liquids or foreign objects to enter this product Failure to follow these instructions can result in serious injury, or equipment damage. HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH
  • Disconnect all power before installing or working with this equipment
  • Verify all connections and replace all covers before turning on power Failure to follow these instructions will result in death or serious injury