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
RS Stock No. 411-1340
Mfr. Part No.3SB3400-0B
BrandSiemens
$15.92
Each
units
Siemens 3SB3 Contact Block 1NO - - - Screw No 10 A -
RS Stock No. 411-1362
Mfr. Part No.3SB3400-0C
BrandSiemens
$16.73
Each
units
Siemens 3SB3 Contact Block 1NC - - - Screw No 10 A No
RS Stock No. 874-2210
Mfr. Part No.3SU1400-1AA10-1BA0
BrandSiemens
$9.51
Each
units
SIRIUS ACT Contact Block 1NO - 5 → 500 V ac/dc - Screw No 10 A No
RS Stock No. 746-0816
Mfr. Part No.3SB1400-0J
BrandSiemens
$16.98
Each
units
Siemens 3SB3 Contact Block 2NO - - - Screw No 10 A -
RS Stock No. 742-9458
Mfr. Part No.3SB3400-0BA
BrandSiemens
$13.91
Each
units
Siemens 3SB3 Contact Block 1NO - - - Screw No 10 A -
RS Stock No. 874-2153
Mfr. Part No.3SU1400-2AA10-1BA0
BrandSiemens
$10.82
Each
units
SIRIUS ACT Contact Block 1NO - 5 → 500 V ac/dc - Screw No 10 A No
RS Stock No. 874-2162
Mfr. Part No.3SU1400-2AA10-1CA0
BrandSiemens
$9.73
Each
units
SIRIUS ACT Contact Block 1NC - 5 → 500 V ac/dc - Screw No 10 A No
RS Stock No. 411-2006
Mfr. Part No.3SB3400-0E
BrandSiemens
$35.51
Each
units
Siemens 3SB3 Contact Block 2NC - - - Screw No 10 A -
RS Stock No. 874-2229
Mfr. Part No.3SU1400-1AA10-1CA0
BrandSiemens
$8.56
Each
units
SIRIUS ACT Contact Block 1NC - 5 → 500 V ac/dc - Screw No 10 A No
RS Stock No. 455-5469
Mfr. Part No.3SB3420-0B
BrandSiemens
$16.20
Each
units
Siemens 3SB3 Contact Block 1NO - - - Screw No - -
RS Stock No. 742-9439
Mfr. Part No.3SB3420-0CA
BrandSiemens
$15.09
Each
units
Siemens 3SB3 Contact Block 1NC - - - Screw No - -
RS Stock No. 411-1889
Mfr. Part No.3SB3400-1RB
BrandSiemens
$26.12
Each
units
Siemens 3SB3 Light Block - Red 230 V LED Screw No - Yes
RS Stock No. 874-2244
Mfr. Part No.3SU1401-1BB40-1AA0
BrandSiemens
$13.80
Each
units
SIRIUS ACT Light Block - Green 24 V ac/dc LED Screw No 20 mA Yes
RS Stock No. 742-9512
Mfr. Part No.3SB3400-2A
BrandSiemens
$21.41
Each
units
Siemens 3SB3 Light Block - - - - Screw No - No
RS Stock No. 742-9540
Mfr. Part No.3SB3423-0B
BrandSiemens
$11.81
Each
units
Siemens 3SB3 Contact Block 1NO - - - Cage Clamp No - -
RS Stock No. 742-9433
Mfr. Part No.3SB3400-0CA
BrandSiemens
$13.91
Each
units
Siemens 3SB3 Contact Block 1NC - - - Screw No 10 A -
RS Stock No. 411-1839
Mfr. Part No.3SB3400-1A
BrandSiemens
$17.87
Each
units
Siemens 3SB3 Light Block - - - BA9S Bulb Screw No - No
RS Stock No. 411-1946
Mfr. Part No.3SB3400-1PB
BrandSiemens
$21.25
Each
units
Siemens 3SB3 Light Block - Red 24 V LED Screw No - Yes
RS Stock No. 453-2927
Mfr. Part No.3SB3403-0C
BrandSiemens
$9.32
Each
units
Siemens 3SB3 Contact Block 1NC - - - Cage Clamp No - -
RS Stock No. 455-5330
Mfr. Part No.3SB3420-0C
BrandSiemens
$18.41
Each
units
Siemens 3SB3 Contact Block 1NC - - - Screw No - -