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$52.49
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$37.58
Each
units
Siemens 3SB3 Contact Block 1NC - - - Screw No 10 A No - -
RS Stock No. 742-9568
Mfr. Part No.3SB3400-0AA
BrandSiemens
HK$103.55
Each
units
Siemens 3SB3 Contact Block 1NO 1NC - - - Screw No 10 A - - -
RS Stock No. 742-9458
Mfr. Part No.3SB3400-0BA
BrandSiemens
HK$66.79
Each
units
Siemens 3SB3 Contact Block 1NO - - - Screw No 10 A - - -
RS Stock No. 411-1930
Mfr. Part No.3SB3400-1PC
BrandSiemens
HK$52.49
Each
units
Siemens 3SB3 Light Block - Green 24 V LED Screw No - Yes - -
RS Stock No. 411-1902
Mfr. Part No.3SB3400-1PE
BrandSiemens
HK$54.07
Each
units
Siemens 3SB3 Light Block - White 24 V LED Screw No - Yes - -
RS Stock No. 742-9565
Mfr. Part No.3SB3423-1PE
BrandSiemens
HK$69.62
Each
units
Siemens 3SB3 Light Block - White 24 V LED Cage Clamp No - Yes - -
RS Stock No. 411-1340
Mfr. Part No.3SB3400-0B
BrandSiemens
HK$36.50
Each
units
Siemens 3SB3 Contact Block 1NO - - - Screw No 10 A - - -
RS Stock No. 453-2949
Mfr. Part No.3SB3411-0B
BrandSiemens
HK$38.69
Each
units
Siemens 3SB3 Contact Block 1NO - - - Solder Pin No - - - -
RS Stock No. 453-2955
Mfr. Part No.3SB3411-0C
BrandSiemens
HK$38.69
Each
units
Siemens 3SB3 Contact Block 1NC - - - Solder Pin No - - - -
RS Stock No. 742-9492
Mfr. Part No.3SB3400-0DA
BrandSiemens
HK$136.50
Each
units
Siemens 3SB3 Contact Block 2NO - - - Screw No 10 A - - -
RS Stock No. 455-5346
Mfr. Part No.3SB3420-1A
BrandSiemens
HK$46.68
Each
units
Siemens 3SB3 Light Block - - - BA9S Bulb Screw No - No - -
RS Stock No. 173-6825
Mfr. Part No.3SU1400-2AA10-3MA0
BrandSiemens
HK$115.13
Each
units
SIRIUS ACT Contact Block NC - 500 V ac/dc - Cage Clamp - 10 A - - -
New
RS Stock No. 193-2303
Mfr. Part No.3SU1401-2BC00-1AA0
BrandSiemens
HK$154.12
Each
units
SIRIUS ACT - - Amber 110 V ac LED Screw - 20 mA Yes - -
New
RS Stock No. 193-2538
Mfr. Part No.3SU1401-1BF00-3AA0
BrandSiemens
HK$150.41
Each
units
SIRIUS ACT - - Amber 230 V ac LED Cage Clamp - 20 mA Yes - -
RS Stock No. 180-9507
Mfr. Part No.3SU1400-1AA10-1GA0
BrandSiemens
HK$111.42
Each
units
3SU1 Contact Block SPDT - 5 → 500 V ac/dc - Screw - 10 A - - -
New
RS Stock No. 193-3795
Mfr. Part No.3SU1401-2BB50-3AA2
BrandSiemens
HK$220.97
Each
units
SIRIUS ACT - - Blue - LED Cage Clamp - 20 mA Yes - -
RS Stock No. 874-2184
Mfr. Part No.3SU1501-1AG00-1BA0
BrandSiemens
HK$107.73
Each
units
SIRIUS ACT Contact & Light Block 1NO Amber 6 → 24 V ac/dc LED Screw Yes 6 A Yes - -
RS Stock No. 742-9502
Mfr. Part No.3SB3400-1A
BrandSiemens
HK$40.04
Each
units
Siemens 3SB3 Light Block - - - BA9S Bulb Screw No - No - -
New
RS Stock No. 193-2720
Mfr. Part No.3SU1551-1AB60-3PA0
BrandSiemens
HK$241.40
Each
units
SIRIUS ACT Contact Block - White 24 ... 24 V LED Cage Clamp - - Yes - -