Entering MIL-HDBK-217 Relays
The following table describes the part parameters required for relays when a MIL-HDBK-217 model is selected for the calculation. This model supports all but the following subcategories of relays:
Automotive
Mercury
Parameter
Type
Description
Quality Level
Choice List [Parts Count also]
The quality screening level used in the manufacturing of the device. Choices vary by subcategory. For more information, see MIL-HBDK-217 Quality Levels.
Construction Type
Choice List
Not required for the following subcategories: Electronic Time Delay, Non-Thermal; Solid State, Time Delay; and Thermal, Bimetal.
The construction type of the device. Choices vary by subcategory.
Type
Choice List [Parts Count also]
Required only for the Solid State, Time Delay subcategory.
The type of solid state relay. Choices are:
Solid State
Time Delay
Hybrid
Contact Form
Choice List
Not required for the Solid State, Time Delay subcategory.
The number and type of active conducting contacts. Many different choices are available, including SPDT, 3PST, and more.
Max Rated Temp
Choice List
Not required for the Solid State, Time Delay subcategory.
The maximum temperature rating for the device in Degrees C. Choices are:
85
125
Load Type
Choice List
Not required for the Solid State, Time Delay subcategory.
The type of load connected external to the device. Choices are:
Lamp
Inductive
Resistive
Cycling Rate (#/hour)
Real
Not required for the Solid State, Time Delay subcategory.
The average number of switching cycles per hour.
[Current Parameters]
Real (Amps)
Not required for the Solid State, Time Delay subcategory.
For more information, see Current Parameters.
[Temperature Parameters]
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Not required for the Solid State, Time Delay subcategory.
For more information, see Basic Temperature Parameters.
[Derating Parameters]
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For more information, see Derating Parameters.