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4contact data, spdt, normally open, ref dwg group 217, electrical ratings, ac, 250v max, 3 amp resistive current rating, c, 150 v max, 3 amp resistive current rating; heater data, ac, 117 v rating, no w rating, no current rating; terminal data, 2 heater element terminals, 2 terminals for contacts; hermetically sealed; metal case; no compensated ambient temp range rating; rated for actuation time, 20 sec operating time; not rated for release time; o/a dim., excl terminals, 2-1/2 in. lg, 1-5/16 in. dia; mts in std octal socket
metal case
A relay switch which is actuated by the effect of internal heat generated by the current in its energizing circuit. For items actuated by ambient, rather than internal temperature changes, see switch, thermostatic.
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
Precious metal content is unknown
The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
HMIC: Hazardous Material Indicator Code. A one position code that identifies a hazardous item.
PMIC: Precious Metal Indicator Code. A one position code which identifies items that have precious metals as part of their content. precious metals are those metals generally considered to be uncommon, highly valuable, and relatively superior in certain properties such as resistance to corrosion and electrical conductivity.
ESD: Electrostatic Discharge. Indicates if an item is susceptible to electrostatic discharge or electromagnetic interference damage. electrostatic discharge damage occurs when an accumulation of static electricity generated by the relative motion or separation of materials is released to another item by direct contact. electromagnetic interference damage occurs when an item comes into proximity with an electrostatic or magnetic field.
ENAC: Enviromental Attribute Code. Identifies items with environmentally preferred characteristics.
CRITL: Criticality Indicator Code. Indicates an item is technically critical by tolerance, fit, application, nuclear hardness properties, or other characteristics.