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Lead Contents

Safety Door Switch: Y/Za/Zb

FAQ No. FAQ02445

Primary Contents

Question

What is Y/Za/Zb?

Answer

IllustrationMarkContact
type
Applicable
models
Remarks
YA165E
A22E
Two contacts switched together
ZaD4B-N
(snap action)
Four contacts switched together:
One movable contact blade opens and closes.
This type cannot use power with different voltages or polarities.
ZbD4B-N
(slow action)
D4BS
D4BL
D4N
D4NS
D4N-R
D4NH
D4NL
D4GS-N
D4F
D4JL
D4GL
Four contacts switched together:
The two movable contact blades are insulated from each other.
This type can use power with different voltages or polarities.

Terminals 11 and 12 in the illustration are the contacts forcibly opened.