Contact Blocks & Light Blocks

Contact Blocks
A contact block is an electrical circuit connector that is used to turn on (make) or turn off (break) an electrical circuit. Contact blocks are commonly found connected to switches, relays and circuit breakers, once these devices are active the contact block allows current to flow and complete a circuit.
Types of Contact Block
Contact blocks are usually designed as an accessory to fit a specific device, therefore matching the correct contact block and device are essential. The contact blocks are available with a wide range of contact configurations that allow the main device to change a circuit in many different ways. Typical contact configurations available are:
• 1NO (One normally open contact)
• 1NC (One normally closed contact)
• 1NO/1NC (One normally open and one normally closed)
• 2NO (Two normally open contact)
• 2NC (Two normally closed contact)
• 2NO/2NC (Two normally open and two normally closed)

Light Blocks
Push button light blocks are an addon block that mount to the rear of a push button switch alongside the contact blocks to act as an indicator light. The light blocks are turned on when the push button is pressed and illuminate through the button head.
Types of Light Block
Light blocks are available in two types:
• LED - These light blocks feature a fixed bright LED that is designed to last the lifetime of the push button. LED light blocks are available in a variety of colours to match the button colour.
• Incandescent - These light blocks feature a changeable incandescent bulb. The bulbs produce a white light that shines through the button head to produce the required colour.

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Viewing 1 - 20 of 801 products
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Description Price Series Block Type Contact Configuration Illumination Colour Voltage Rating Illumination Type Terminal Type Body/Fixing Collar Included Current Rating LED Included CAD Drawing For Use With Accessory Type
RS stock no. 331-0473
Mfr. Part No.ZBE101
R 86.24
Each
units
Harmony XB Contact Block 1NO - - - Screw No 10 A → 600 V ac No - - -
RS stock no. 331-0489
Mfr. Part No.ZBE102
R 86.24
Each
units
Harmony XB Contact Block 1NC - 600 V ac - Screw No 10 A No - - -
RS stock no. 331-0158
Mfr. Part No.ZB4BZ101
R 123.20
Each
units
Harmony XB4 Contact Block 1NO - 600 V - Screw Yes 10 A - - - -
RS stock no. 746-8949
Mfr. Part No.ZALVM5
R 334.88
Each
units
Harmony ZALV Light Block - Yellow 230 → 240 V LED Screw No - Yes - - -
RS stock no. 331-0164
Mfr. Part No.ZB4BZ102
R 123.20
Each
units
Harmony XB4 Contact Block 1NC - 600 V - Screw Yes - - - - -
RS stock no. 331-0192
Mfr. Part No.ZB4BZ105
R 198.24
Each
units
Harmony XB4 Contact Block 1NO 1NC - - - Screw Yes 10 A - - - -
RS stock no. 610-2950
Mfr. Part No.ZBVM4
R 272.16
Each
units
Harmony XB Light Block - Red 230 V LED Screw No - Yes - - -
RS stock no. 330-9568
Mfr. Part No.ZB4BV6
R 134.40
Each
units
Harmony XB4 Light Block - - 250 V Incandescent BA 9s Base Fitting Yes - No - - -
RS stock no. 746-9481
Mfr. Part No.ZALVM6
R 334.88
Each
units
Harmony ZALV Light Block - Blue 230 → 240 V LED Screw No - Yes - - -
RS stock no. 331-0186
Mfr. Part No.ZB4BZ103
R 197.12
Each
units
Harmony XB4 Contact Block 2NO - 600 V - Screw Yes 10 A - - - -
RS stock no. 609-2718
Mfr. Part No.ZB4BW0B15
R 334.14
Each
units
Harmony XB4 Contact & Light Block 1NO 1NC White 24 V ac/dc LED Screw Yes 10 A Yes - - -
RS stock no. 411-1362
Mfr. Part No.3SB3400-0C
BrandSiemens
R 87.08
Each
units
Siemens 3SB3 Contact Block 1NC - - - Screw No 10 A No - - -
RS stock no. 610-2944
Mfr. Part No.ZBVM3
R 272.16
Each
units
Harmony XB Light Block - Green 230 V LED Screw No - Yes - - -
RS stock no. 610-2758
Mfr. Part No.ZALVM1
R 334.88
Each
units
Harmony ZALV Light Block - White 230 → 240 V LED Screw No - Yes - - -
RS stock no. 331-0574
Mfr. Part No.ZENL1111
R 147.84
Each
units
Harmony XAL Contact Block 1NO - - - Screw No 10 A - - - -
RS stock no. 610-2837
Mfr. Part No.ZBVB4
R 123.80
Each
units
Harmony XB Light Block - Red 24 V LED Screw No - - - - -
RS stock no. 103-8555
Mfr. Part No.3SU1401-1BB00-1AA0
BrandSiemens
R 96.00
Each
units
SIRIUS ACT Light Block - Amber 24 V ac/dc LED Screw - 20 mA Yes - - -
RS stock no. 330-9669
Mfr. Part No.ZB4BVG4
R 267.68
Each
units
Harmony XB4 Light Block - Red 110 → 120 V LED Screw Yes - Yes - - -
RS stock no. 815-1907
Mfr. Part No.ZBVBG5
R 294.56
1 Pack of 5
Pack(s)
Harmony XB Light Block - Orange 24 → 120 V LED Screw No - - - - -
RS stock no. 411-1340
Mfr. Part No.3SB3400-0B
BrandSiemens
R 86.82
Each
units
Siemens 3SB3 Contact Block 1NO - - - Screw No 10 A - - - -