The ZB4BS557 is a non-illuminated push button head with a mushroom profile, made of metal for robust industrial use.
Product ModelZB4BS557
Product ID24495
Stock on Request
Last updated: 8/29/2026
Key Features
1
FeatureRobust metal construction for durability
2
FeatureMushroom profile for easy installation
3
FeatureDesigned for non-illuminated push button applications
4
FeatureIdeal for industrial settings with high mechanical durability
5
FeatureCompact design with dimensions of 1.6 in (40 mm) height and 2.2 in (57 mm) depth
Technical Specifications
Detailed engineering parameters based on manufacturer documentation
Specifications may be subject to change without notice
Parameter
Value
Parameter
Value
Range of Product
Harmony XB4
Product or Component Type
Head for non-illuminated push-button
Device short name
ZB4
Bezel material
Black metal
Mounting diameter
0.9 in (22 mm)
Sale per indivisible quantity
1
Head type
Standard
Shape of signaling unit head
Round
Type of operator
latching
Reset
Turn to release
Operator profile
Yellow mushroom à 40 mm, unmarked
CAD overall width
1.6 in (40 mm)
CAD overall height
1.6 in (40 mm)
CAD overall depth
2.2 in (57 mm)
Net Weight
0.15 lb(US) (0.07 kg)
Mechanical durability
300000 cycles
Electrical composition code
C11 3 single front mountingC15 1 single front mountingC7 4 single front mountingC8 4 single and double front mountingC10 4 single and double front mounting
Device presentation
Basic element
Protective treatment
TH
Ambient Air Temperature for Storage
-40...158 °F (-40...70 °C)
Ambient Air Temperature for Operation
-40...158 °F (-40...70 °C)
Overvoltage category
Class I IEC 60536
IP degree of protection
IP66 IEC 60529IP67IP69IP69K
NEMA degree of protection
NEMA 13NEMA 4X
IK degree of protection
IK06 conforming to IEC 50102
Standards
UL 508EN/IEC 60947-5-5JIS C8201-5-1EN/IEC 60947-5-4CSA C22.2 No 14EN/IEC 60947-1EN/IEC 60947-5-1JIS C8201-1
Product Certifications
BVCSADNVLROS (Lloyds register of shipping)UL Listed
Vibration resistance
5 gn 2...500 Hz)IEC 60068-2-6
Shock resistance
30 gn 18 ms) half sine wave acceleration IEC 60068-2-2750 gn 11 ms) half sine wave acceleration IEC 60068-2-27
ZB4BS557 - Non-Illuminated Push Button Head by Schneider Electric | INDPRT
