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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Description Price Series Block Type Contact Configuration Illumination Colour Voltage Rating Illumination Type Terminal Type Body/Fixing Collar Included Current Rating LED Included For Use With Accessory Type
RS Stock No. 411-1946
Mfr. Part No.3SB3400-1PB
BrandSiemens
HK$66.67
Each
units
Siemens 3SB3 Light Block - Red 24 V LED Screw No - Yes - -
RS Stock No. 411-1362
Mfr. Part No.3SB3400-0C
BrandSiemens
HK$43.25
Each
units
Siemens 3SB3 Contact Block 1NC - - - Screw No 10 A No - -
RS Stock No. 411-1930
Mfr. Part No.3SB3400-1PC
BrandSiemens
HK$61.80
Each
units
Siemens 3SB3 Light Block - Green 24 V LED Screw No - Yes - -
RS Stock No. 455-5346
Mfr. Part No.3SB3420-1A
BrandSiemens
HK$68.97
Each
units
Siemens 3SB3 Light Block - - - BA9S Bulb Screw No - No - -
RS Stock No. 193-2548
Mfr. Part No.3SU1401-1BC00-3AA0
BrandSiemens
HK$164.05
Each
units
SIRIUS ACT - - Amber 110 V ac LED Cage Clamp - 20 mA Yes - -
RS Stock No. 193-3775
Mfr. Part No.3SU1401-3BA50-5AA0
BrandSiemens
HK$59.49
Each
units
SIRIUS ACT - - Blue - LED Socket connection (THT) - 20 mA Yes - -
RS Stock No. 173-6824
Mfr. Part No.3SU1400-2AA10-1MA0
BrandSiemens
HK$70.58
Each
units
SIRIUS ACT Contact Block NC - 500 V ac/dc - Screw - 10 A - - -
RS Stock No. 193-2763
Mfr. Part No.3SU1401-1BB20-3AA2
BrandSiemens
HK$230.86
Each
units
SIRIUS ACT - - Red - LED Cage Clamp - 20 mA Yes - -
RS Stock No. 874-2285
Mfr. Part No.3SU1501-1AG60-1CA0
BrandSiemens
HK$118.52
Each
units
SIRIUS ACT Contact & Light Block 1NC White 6 → 24 V ac/dc LED Screw Yes 6 A Yes - -
RS Stock No. 180-9514
Mfr. Part No.3SU1401-1BG20-1AA0
BrandSiemens
HK$72.30
Each
units
3SU1 Light Block - Red 6 → 24 V ac/dc LED Screw - 20 mA Yes - -
RS Stock No. 135-5666
Mfr. Part No.3SU1401-1BH30-1AA0
BrandSiemens
HK$130.00
Each
units
SIRIUS ACT Light Block - Yellow 24 → 240 V ac/dc LED Screw - - Yes - -
New
RS Stock No. 197-3308
Mfr. Part No.3SU1401-1BC24-3AA0
BrandSiemens
HK$398.91
Each
units
3SU1 Light Block - - 110 V LED Spring type - - - - -
RS Stock No. 193-2213
Mfr. Part No.3SU1401-2BB00-3AA2
BrandSiemens
HK$240.93
Each
units
- Light Block - Orange 24-240 V AC/DC LED Cage Clamp - 20 mA Yes - -
RS Stock No. 135-5659
Mfr. Part No.3SU1400-1AA10-3HA0
BrandSiemens
HK$94.48
Each
units
SIRIUS ACT Contact Block NC - 5 → 500 V ac/dc - Cage Clamp - 10 A - - -
RS Stock No. 874-2162
Mfr. Part No.3SU1400-2AA10-1CA0
BrandSiemens
HK$57.63
Each
units
SIRIUS ACT Contact Block 1NC - 5 → 500 V ac/dc - Screw No 10 A No - -
RS Stock No. 193-2521
Mfr. Part No.3SU1401-1BG60-3AA0
BrandSiemens
HK$77.33
Each
units
SIRIUS ACT - - White - LED Cage Clamp - 20 mA Yes - -
RS Stock No. 173-6825
Mfr. Part No.3SU1400-2AA10-3MA0
BrandSiemens
HK$92.99
Each
units
SIRIUS ACT Contact Block NC - 500 V ac/dc - Cage Clamp - 10 A - - -
RS Stock No. 193-3858
Mfr. Part No.3SU1551-1AB60-3MA0
BrandSiemens
HK$263.23
Each
units
SIRIUS ACT Contact Block - White 24 ... 24 V LED Cage Clamp - - Yes - -
RS Stock No. 181-2878
Mfr. Part No.3SU1401-1BC30-1AA0
BrandSiemens
HK$107.47
Each
units
SIRIUS ACT Light Block - Yellow 110 V ac LED Screw Terminal - 20 mA Yes - -
RS Stock No. 193-2549
Mfr. Part No.3SU1401-1BG00-1AA0
BrandSiemens
HK$72.30
Each
units
SIRIUS ACT - - Amber - LED Screw - 20 mA Yes - -