What the product is

Hager ADA320G is a 1P electronic RCBO designed to combine overcurrent protection and 30mA residual current protection in one modular device. For this exact SKU, Hager verifies a rated current of 20A, a B curve trip characteristic, Type A residual current detection, a 6kA short-circuit breaking capacity and a one-module format for DIN rail installation. Rated operational voltage is 230V, rated insulation voltage is 250V and rated impulse withstand voltage is 4kV.

ADA320G sits within Hager's reduced-height ADA RCBO family. The defining buying difference is the current rating. ADA320G is the 20A member of the range, so it should be selected only where the circuit design and board schedule call for 20A protection and not treated as a generic substitute for adjacent variants.

Verified key features or specifications

• Rated current: 20 A
• Rated residual operating current: 30 mA
• Residual current type: Type A
• Trip curve: B
• Rated short-circuit breaking capacity: 6 kA
• Type of pole: 1P
• Number of modules: 1
• Rated operational voltage: 230 V
• Ingress protection: IP20
• Total power loss under In: 5.19 W
• Flexible conductor capacity: 1 to 10 mm²
• Rigid conductor capacity: 1 to 16 mm²
• Dimensions: 92 x 17.7 x 70 mm
• Operating temperature: -20 to 70 °C
• Suitable for DIN rail: yes

Why the 20A variant matters

ADA320G is the 20A version of the family, and that exact rating is why it exists. In board design and replacement work, moving up or down the range is not a minor detail. The protective rating must match the circuit specification. ADA320G therefore suits jobs where 20A protection is required and where the rest of the device characteristics also line up with the schedule.

Type A residual current protection should be treated as a core selection point. Hager identifies ADA320G as Type A, meaning it is intended to detect AC and pulsating DC residual currents. That helps distinguish it clearly from more basic residual current formats and keeps the page aligned to the real technical requirement.

Technical standards and ratings

Hager identifies the ADA reduced-height RCBO range to BS EN 61009-1 and BS IEC 1009-2-2. Hager also states that the range supports compliance with BS 7671 provisions for 30mA additional protection, circuit segregation and protection of concealed wiring when installed in a consumer unit. ADA320G also carries energy limitation class 3, 50Hz operation, 16,000 electrical endurance cycles and 20,000 mechanical operations.

Installation, fit and compatibility

ADA320G is designed for modular DIN rail installation. One-module width helps preserve space in compact boards, while top and bottom screw terminals support a familiar installation method. Hager verifies conductor capacity of 1 to 10 mm² flexible and 1 to 16 mm² rigid cable. Hager's residential distribution literature also places RCBOs like ADA320G within consumer units intended to accommodate RCBO outgoing ways, which helps position the device in its wider installation environment.

Who this exact variant suits

ADA320G suits installers and buyers who need a verified 20A Type A RCBO for a single-phase final circuit and who want individual RCBO protection rather than a shared RCD arrangement. It is also suitable where board space is limited and a one-module outgoing protective device is preferred.

Why buy this exact variant

Choose Hager ADA320G when the board schedule calls for a 20A B curve RCBO with 30mA Type A protection and 6kA breaking capacity. The value in this exact SKU is the verified combination of current rating, modular footprint, conductor capacity and Hager consumer unit context. That makes it a practical choice for new assembly work and exact-match replacement jobs.

Warranty

Hager lists switchgear in its UK product warranty policy with a 2-year warranty period.

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