TBC 1 Gang 20A Double Pole Switch with Neon Indicator Heater / Aircond Switch ( T1-120 )

T1-120
TBC 1 Gang 20A Double Pole Switch with Neon Indicator Heater / Aircond Switch ( T1-120 )
TBC 1 Gang 20A Double Pole Switch with Neon Indicator Heater / Aircond Switch ( T1-120 )
TBC 1 Gang 20A Double Pole Switch with Neon Indicator Heater / Aircond Switch ( T1-120 )

The TBC T1-120 belongs to the B8 Series of modular wiring devices, purpose-built to meet the demanding switching requirements of high-power domestic and light commercial appliances. As a double pole switch, it simultaneously disconnects both live and neutral conductors, providing a higher level of electrical safety compared to single pole alternatives.

Fitted with a neon indicator light, the T1-120 delivers immediate visual confirmation of circuit status, eliminating ambiguity in environments where multiple circuits are managed. Its modern slim profile and clean white finish integrate seamlessly into contemporary interior installations.

Constructed from high-grade polycarbonate with brass and phosphor bronze contacts, the T1-120 is designed for long service life under continuous high-load conditions, making it the preferred choice for electricians, contractors, and facility managers across residential and commercial projects.

Key Features

Double Pole (DP) Switching: Simultaneously isolates both live and neutral conductors for enhanced user safety on high-power circuits.
Built-in Neon Indicator: Provides clear, immediate visual indication of ON/OFF power status, reducing operational errors.
Rated at 20A / 250V AC: Engineered to handle the sustained current demands of water heaters, air conditioners, and other high-load appliances.
Polycarbonate (PC) Construction: Both plate and base are manufactured from impact-resistant, heat-resistant, and flame-retardant polycarbonate material.
Brass and Phosphor Bronze Contacts: Ensures low contact resistance, reliable conductivity, and extended mechanical and electrical service life.
Smooth Rocker Switching Mechanism: Delivers consistent, positive switching action with minimal operating force for everyday reliability.
Surface and Flush Mounting Compatibility: Supports both surface-mount and flush-mount installation methods, offering flexibility across different wiring configurations.
IP20 Protection Rating: Suitable for standard indoor environments, protecting internal components against solid foreign objects greater than 12mm.
Compact 86 × 86 mm Form Factor: Slim, modern design fits standard wall boxes and complements contemporary interior aesthetics.
Wide Operating Temperature Range: Rated for use between -5°C and +40°C with humidity tolerance up to 95%, ensuring stable performance across typical indoor conditions.

The TBC T1-120 20A Double Pole Switch is a purpose-designed switching device within the TBC T Series, developed specifically for the control of high-power fixed appliances including water heaters and air conditioning units. Unlike standard single pole switches, the double pole configuration ensures complete circuit isolation by breaking both the live and neutral conductors simultaneously, a critical safety requirement for appliances rated at 20A and above.

The switch housing and faceplate are fabricated from high-quality polycarbonate, a material selected for its superior impact resistance, dimensional stability under thermal stress, and inherent flame-retardant properties. Internal current-carrying components utilise brass and phosphor bronze contacts, chosen for their excellent electrical conductivity, corrosion resistance, and ability to withstand repeated switching cycles without significant wear.

The integrated neon indicator lamp provides a reliable, low-maintenance visual status signal that remains clearly visible in both lit and dimly lit environments. With a standardised 86 × 86 mm footprint and dual mounting compatibility, the T1-120 is straightforward to install in new builds and retrofit projects alike, reducing installation time and labour costs for electrical contractors.

The TBC T1-120 operates as a mechanically actuated double pole rocker switch, utilising a spring-loaded contact mechanism to achieve a positive snap-action switching operation. This snap-action design minimises contact bounce and arc duration during switching events, contributing to reduced contact erosion and extended electrical endurance. The brass and phosphor bronze contact assembly is dimensioned to carry a continuous rated current of 20A at 250V AC, with the contact geometry optimised to distribute thermal load evenly across the contact surface.

The neon indicator circuit is wired in parallel with the load contacts, illuminating whenever the switch is in the ON position to confirm circuit energisation. The polycarbonate enclosure provides a comparative tracking index (CTI) appropriate for the rated voltage class, and the flame-retardant grade of the material ensures the switch self-extinguishes in the event of an internal fault, limiting fire propagation risk in wall-mounted installations.

  • Electric Water Heaters: Provides dedicated double pole isolation and clear status indication for storage and instantaneous water heater circuits in residential bathrooms and kitchens.
  • Air Conditioning Units: Serves as a local isolating switch for split-system and window-type air conditioners in homes, offices, and retail spaces.
  • High-Power Fixed Appliances: Suitable for controlling other high-load fixed electrical equipment requiring a 20A double pole switching point.
  • Residential Electrical Installations: Installed in houses, apartments, and condominiums as part of standard wiring schemes for wet area and high-load circuits.
  • Commercial and Light Industrial Premises: Used in offices, retail outlets, hotels, and light commercial buildings where reliable appliance switching is required.
  • Renovation and Retrofit Projects: Compatible with existing 86 mm wall boxes, making it straightforward to upgrade ageing single pole switches to safer double pole configurations.
  • New Building Construction: Specified by M&E consultants and electrical contractors as a standard switching solution for high-power appliance circuits in new developments.
Model NumberT1-120/ T1-220
SeriesT Series
Product TypeDouble Pole Rocker Switch with Neon Indicator
Rated Current20A
Rated Voltage250V AC
Number of Poles2 (Double Pole)
Control TypeRocker Switch
IndicatorNeon Indicator (Yes)
Mounting TypeSurface / Flush Mount
Protection Degree (IP Rating)IP20
Plate MaterialPolycarbonate (PC)
Base MaterialPolycarbonate (PC)
Contact MaterialBrass and Phosphor Bronze
Dimensions (H × W)86 mm × 86 mm
Type of terminal Pillar type
Operating Temperature-5°C to +40°C
Operating HumidityUp to 95% RH
Usage EnvironmentIndoor
Colour / FinishWhite
Standards Compliance
IEC 60669-1

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