Super Engineering Works

Electrical Control Panel Accessories

Contact Block

Surdhi make Push Buttons, Selector Switches and Pilot Lamps are normally Suitable for Control & Auxiliary Circuits, A.C. or D.C. backed by thirty years of proven performance in the field.

These devices have contact reliability, increased operational safety, compactness and reduced labour input. These devices generally comply with the requirement of IS / IEC : 60947-5-1 : 2003. Push Buttons & Selector. Switches are available in Chrome Plated Metallic body.

The elements are interchangeable and can be stacked without additional hardware, 1 to 4 element (NO or NC) can be used with Push buttons and Selector Switches. For illuminated Push Buttons 1 or 2 element (NO or NC) may be used.

The Pilot Lights and illuminated switches are suitable for direct supply or supply through series resistor, using bayonet cap filament bulb type BA-9S for both AC/DC supply from 6V to 230V.

Indicating Lights with switching device and integral LED modules can be directly mounted on panel and rated voltage can be directly applied to the module input. These are available in Standard and barrel type enclosure in Thermoplastic housing for AC / DC and AC or DC Supply.

  • Compact 22.5 Mm Diameter : The smaller mounting diameter reduces mounting space by 30% as compared to conventional 30.5 mm design.
  • Energy Saver : ∅ 22.5 mm devices require lamp with 2/2.6W instead of 7 to 10 Watt Lamps used in ∅ 30.5 mm devices. This results in energy saving.
  • Mounting : Only screw driver is required for fixing these devices on to panel having thickness of 1 to 6 mm in any position. The whole assembly is locked into position with the help of two M4 pointed screw on the bracket. These screws also ensure the earthing. We recommend fixing centres as per standard. The Screws should be tightened simultaneously to an extent as to pierce through the paint on the panel from inside.

Salient Features
  • Very good flame resistance.
  • Self wiping contact ensure trouble free operation.
  • Interchangeable blocks provide multiple contact configurations at site.
  • State of the art workmanship aesthetic elegance.
  • SURDHI'S more than two decades of trust and assurance for consistency & reliability
  • SURDHI'S traditional hall mark for precision & confidences exacting quality
  • Protection against electrical shock (Unit Earthed)
  • Safe in operation, locking device unaffected by vibration.

Our complete Control Panel Accessories Products list is like :
  • Push Button/Flash Actuator
  • Contact Blocks NO/NC.
  • Mushroom Stay-put Actuator,
  • Twin Actuator
  • Luminous Actuator
  • Luminous Selector Actuator
  • Luminous Twin Actuator
  • Selector Actuator
  • Key Selector Actuator
  • Key Mushroom Actuator

Technical Specifications

Actuators with Contact Blocks

Standard Conformity IS / IEC : 60947-5-1 : 2003
Rated Thermal Current 10 Amps.
Rated Insulation Voltage For all Push Buttons and Selector Switches excluding Luminous Switches & Lamp Holders AC 500 Volts 50 Hz; DC 250V
For illuminated Switches & Lamp Holder AC 250 Volts 50 Hz; DC 250V
Rated Operational Voltage for contact blocks AC 500 Volts 50 Hz; DC 220V
Electrical Ratings IEC : 947-5 (1) 1990 AC 15 = 4A, 415 V AC, DC 13 = 0.5 A, 110V DC With a Time Constant of 300 millisecond
Mechanical Life Over 1 million Operative
Electrical Life Depends on load current
Switching frequency Minimum 1200 Cycles per hour
Degree of protection All protecting heads IP 65 Except Mushroom Key Release which is IP 54, Push Buttons with rubber shrouds IP 66
Dielectric test Voltage 2.5 KV FOR 1 MIN
Operating Temperature limit (except Shrouds) -
Non-illuminated Units -25o to + 70o
Illuminated Units -25o to + 50o
Operating Position All Position
Backup Fuse Rating HRC Type rated for resistive loading 10 Amps. Cartridge fuse
Terminal Capacities Maximum 2 x 1.5mm2 or 1x 2.5 mm2 Minimum 1x 0.5 mm2
Altitude <3000 meters
Terminal Marking Dual marketing system 1-2 for normally closed and 3-4 for normally open

For LED Indicators

Rated Voltage 12V, 24V, 48V, 60V AC/DC, 110V, 240V AC, 110V, 220V DC, 440V AC are also available (-20% + 10%)
Current Consumption 12V, 24V, 48V, 60V AC/DC, 110V, 240V, 440V AC - max 25mA | 110V DC - max 15mA | 220V DC - max. 10MA
Power Consumption 12V, 24V AC/DV 110V, 240V AC - 0.5 watts. | 48V, 60V AC/DC - 1.25 watts. | 110V, 220V DC - 1.75 watts | 440V AC - 0.75 watts
Service life (at a nominal voltage and at ambient temperature of 25oC) 100,000 hrs
Insulation Resistance >100 MΩ at 50V DC
Dielectric Strength 2.5KV AC

Note : LVPG (Low Voltage Glow Protection) : Protects the LED to glow due to the residual voltage and thus residual voltage and thus gives reliable switch off the LED and it is designed as per the specific voltage.

  • Luminous Actuator

  • Flush Actuator

  • Pilot Light

  • LED Indicating Light

  • LED Luminous Twin Actuator

  • Mushroom Key Actuator

  • Mushroom Stayput

  • Luminous Selector Actuator Led Bulb

  • Selector Actuator

  • Twin Actuator

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