Motor Protectors, Motor Protection - Self-Hold 7AM Series Manual Reset Thermal Protectors 

Thermtrol's innovative Self-Hold 7AM thermal protector combines the protection of a Klixonź 7AM with a self-holding feature. Designed to prevent overheating in motors, the Self-Hold 7AM offers the best attributes of one shot protectors and auto reset protectors in a single package. The Self-Hold 7AM, once activated in a fault condition, maintains its open state until power is removed. No reset button here-simply remove power and the device will cool and reset. This inherent design feature adds an extra level of security over automatic reset devices of any type and yields test agency classification as a manual reset device. It is the reliable, cost effective solution for numerous motor applications.

 Model Types*
Model
Temperature Range
Voltage & Current Rating
SM7AM
SK7AM
65șC - 145șC
65șC - 145șC
120VAC   85 LRA  240VAC  85 LRA
Lead Wire Specifications
Lead Attachments:
 18AWG-22AWG Standard Termination
16AWG-14AWG Also Available
Lead Pull Strength:
 15lbs. Minimum Destructive Pull
Klixonź is a registered trademark of Texas Instruments, Inc.

Certifications
Thermtrol's self-hold 7AM motor protectors are recognized by (UL), and tested to (CSA) standards. Reference File: E40044

The Thermtrol Corporation quality assurance system is ISO9001:1994 certified for 7AM platform style thermostats and lead wire assemblies.     

FEATURES AND APPLICATIONS
Features:
  • Recognized Component in UL
        Product Category XCSZ2,
        Overheating Protection for Motors.
  • Tested to UL Standard 2111 which     included:
  • 18 Day Locked Rotor Test
  • Limited Short Circuit Test
  • 10 Cycle Locked Rotorand 50 Cycle     Endurance Test
  • 0șC Ambient Test
  • Miniature size.
  • Manufactured in the USA utilizing 100%     domestic materials.
  • Reliable temperature performance over     the life of the device.
  • Both current and temperature sensitive     for maximum design flexibility.
  • Short lead time.
  • Thermtrol will customize to your     specifications by adding leads and     terminals, or even a complete harness,     if desired.
    		• Applications:
  • Remote Location Motors
  • Vacuum Cleaner Motors
  • Submersible Pump Motors
  • Fractional Horsepower Motors
  • Can be used virtually anywhere an auto     reset and/or a one shot protector is     used!


    • SM7AM A SK7AM B


    Selecting the self-hold 7AM for your application: example  SK7AM 202 A 5

     
    SK7AM
    202
    A
    5

     Model Type
    Standard Opening Temperature
    Terminal
    Configuration
    A-Terminals on same end B-Terminals on opposite ends
    Standard Opening Temperature Tolerance ± 5șC

     

    STEP 1: Choose Model  Type

     Model Types*
    Model
    Temperature Range
    Voltage & Current Rating
    SM7AM
    SK7AM
    65șC - 145șC
    65șC - 145șC
    120VAC   85 LRA   240VAC   85 LRA
    Lead Wire Specifications
    Lead Attachments:
    		 18AWG-22AWG Standard Termination
    16AWG-14AWG Also Available
    Lead Pull Strength:
    		 15lbs. Minimum Destructive Pull
    Klixonź is a registered trademark of Texas Instruments, Inc.

    Back to Top

    STEP 2:  Choose Opening Temperature Code

    Standard Opening Temperature
    Opening Temp.
    °C
    Low Resistance Bi-Metal
    70O/cmf
    High Resistance Bi-Metal
    468O/cmf
    65
    020
    200
    70
    021
    201
    75
    022
    202
    80
    023
    203
    85
    024
    204
    90
    025
    205
    95
    026
    206
    100
    027
    207
    105
    028
    208
    110
    029
    209
    115
    030
    210
    120
    031
    211
    125
    032
    212
    130
    033
    213
    135
    034
    214
    140
    035
    215
    145
    036
    216
    Nonstandard opening temperatures and bimetal resistances are available.

    Back to Top

    STEP 3: Choose Stat's Terminal Configuration Type A or B

    Back to Top

    STEP 4:  Determine Lead Configuration

    Lead Wire Configurations
    Thermtrol's state-of-the-art automated lead processing can produce lead wires to meet customer application needs for overall length, terminated connectors and stripped length requirements! Please specify wire gauge, conductor type, insulation type, and strip length/termination type when ordering lead wire assemblies.

    Lead Tolerances
    Unless specified otherwise by the customer, the following tolerances apply to all assemblies.
    Lead Lengths
    Minimum Pull Tests
     0" to 2"
     2.1" to 6"
     6.1" to 12"
     12.1" to 36"
     36.1" to 120"
     Over 120"
    +/-0.062"
    +/-0.125"
    +/-0.250"
    +/-0.500"
    +/-0.750"
    +/-1.000"
    Wire ga.
    Lead to Thermostats
    Lead to AMP Terminal
    22-20 ga
    18 ga.
    16-14 ga
    20 lbs
    20 lbs
    20 lbs
    20 lbs
    20 lbs
    50 lbs

    Back to Top

    STEP 5: Choose Insulating Sleeve

    Sleeving
    In order to achieve optimum heat transfer from the protected medium or ambient to the thermostat, the 7AM has been designed with the case connected to the bimetallic disc. However, this features also makes it necessary to electrically insulate the 7AM from the mounting surface.
    Typically, this is accomplished with a Mylar sleeve available in 0.006-inch thickness, and marked with the part number. Custom markings and other sleeve materials can also be provided.

    Ultimate Trip Current vs.
    Protector Ambient Temperature
    		 Average First Cycle Tripping Time vs.
    Current in 25°C Ambient
    (Approximate: to be used for selecting samples only)

    Back to Top