Datasheet

D4B-@N
6
Direct Opening Mechanism
1NO/1NC Contact (Snap-action)
Conforms to EN60947-5-1 Direct Opening (Only NC contact has a direct opening mechanism.)
1NC/1NO Contact (Slow-action) 2NC Contact (Slow-action)
Contact Form
Note: Terminal numbers are according to EN50013; contact symbols are according to IEC60947-5-1.
A
B
1. When contact welding occurs. 2. When contacts are being pulled apart.
Movable contact
Plunger
Safety cam
Fixed contact (NC)
Movable contact
blade
Safety cam directly
pushes up the
movable contact
blade.
3. When contacts are completely
pulled apart.
Contact spring
Return spring
Fixed contact (NC)
Movable contact
Plunger
Conforms to EN60947-5-1 Direct Opening
(Only NC contact has a direct opening mechanism.)
When contact welding occurs, the contacts are separated
from each other by the plunger being pushed in.
Fixed contact (NO)
Contact spring
Return spring
Fixed contact (NC)
Movable contact
Plunger
Conforms to EN60947-5-1 Direct Opening
(Both NC contacts have a direct opening mechanism.)
When contact welding occurs, the contacts are separated
from each other by the plunger being pushed in.
Model Contact Contact form Diagrams Explanation
D4B-@1@N
1NC/1NO
(Snap-action)
D4B-@5@N
1NC/1NO
(Slow-action)
D4B-@A@N
2NC
(Slow-action)
13 14
11 12
Za
11-12
13-14
Stroke
ON
Only NC contact 11-12 has a
certified direct opening
mechanism.
Terminal numbers 11-12 and
13-14 cannot be used as unlike
poles.
11
23
12
24
Zb
11-12
23-24
Stroke
ON
Only NC contact 11-12 has a
certified direct opening
mechanism.
Terminal numbers 11-12 or
23-24 can be used as unlike
poles.
11
21
12
22
Zb
11-12
21-22
Stroke
ON
Both NC contacts 11-12 and
21-22 have a certified direct
opening mechanism.
Terminal numbers 11-12 and
21-22 can be used as unlike
poles.