Why Choose the ABB 856120 APO Modular Enclosure 28M 2R?
The ABB 856120 (4TBO856120C0100) is a robust and versatile 28-module, 2-row electrical distribution enclosure designed to house modular DIN-rail equipment in industrial, commercial and electrical installation applications. As part of the established ABB APO Enclosures series, this enclosure provides a practical solution for organising and protecting circuit breakers, residual current devices and other modular electrical components.
Also identified by the manufacturer's type designation AP71DIN2, the ABB 856120 is a complete modular equipment enclosure featuring a glass-fibre reinforced polyester housing, internal equipment chassis, front plate and transparent pivoting cover. The enclosure is designed for surface mounting and provides convenient access to installed electrical devices while helping protect internal equipment from the surrounding environment.
With a capacity of 28 modular units arranged across 2 rows of 14 modules and dimensions of 302 mm wide, 372 mm high and 175 mm deep, the ABB 856120 is ideal for compact electrical distribution assemblies. Its RAL 7035 light grey finish, integrated DIN-rail arrangement and practical cable entry provisions make it suitable for professional electrical installation and panel-building projects.
Key Advantages
- Purpose-designed ABB APO modular electrical distribution enclosure.
- 28-module capacity suitable for modular DIN-rail electrical equipment.
- 2-row configuration with 14 modular units per row.
- 302 × 372 × 175 mm dimensions provide a compact distribution enclosure format.
- Durable glass-fibre reinforced polyester construction offers corrosion resistance and electrical insulation.
- Transparent pivoting cover allows visual inspection of installed equipment without opening the enclosure.
- Integrated DIN-rail equipment chassis supports organised modular component installation.
- Supplied with a front plate and earthing terminal as part of the modular equipment arrangement.
- Practical combi cable entry provisions support flexible electrical wiring installations.
- RAL 7035 light grey finish provides a professional appearance.
- Suitable for surface-mounted electrical distribution applications.
- Part of the modular ABB APO enclosure system, designed for flexible industrial installations.
Key Features
- ABB APO Enclosures product range.
- Manufacturer reference: 856120.
- ABB order code: 4TBO856120C0100.
- Manufacturer type designation: AP71DIN2.
- APO 71 modular enclosure format.
- 28 modular units (28M) total capacity.
- 2 rows (2R) of 14 modular units.
- 302 mm width, 372 mm height and 175 mm depth.
- Glass-fibre reinforced polyester enclosure housing.
- Transparent hinged cover for equipment visibility and access.
- Integrated DIN-rail mounting arrangement for modular electrical devices.
- Internal chassis and front plate included in the equipped enclosure configuration.
- Earthing terminal incorporated into the equipment chassis arrangement.
- RAL 7035 light grey enclosure finish.
- Surface-mounted installation suitable for electrical distribution systems.
- Combi cable gland provisions for incoming and outgoing wiring.
- Designed for industrial electrical distribution and modular protection equipment.
Technical Specifications
- Manufacturer: ABB
- Product group: APO Enclosures
- Series: ABB APO
- Enclosure format: APO 71
- Manufacturer reference: 856120
- ABB order code: 4TBO856120C0100
- Manufacturer type: AP71DIN2
- Product type: Modular electrical distribution enclosure
- Product description: 856120 Modular Enclosure 28M 2R
- Enclosure configuration: Equipped modular enclosure
- Modular capacity: 28 modules
- Number of rows: 2
- Modules per row: 14
- Nominal module width: 18 mm
- Width: 302 mm
- Height: 372 mm
- Depth: 175 mm
- Dimensions (W × H × D): 302 × 372 × 175 mm
- Housing material: Glass-fibre reinforced polyester
- Material category: Non-metallic, electrically insulating
- Colour: Light grey
- RAL colour code: RAL 7035
- Cover type: Transparent pivoting cover
- Door / cover transparency: Transparent
- Mounting method: Surface mounting
- DIN-rail mounting: Yes
- Internal chassis: Included
- Front plate: Included
- Earthing terminal: Included with equipment chassis
- Enclosure base: Base with two open sides
- Upper cable entry provisions: 13 × M20/16 combi entries
- Lower cable entry provisions: 2 × M32/25, 3 × M25/20 and 4 × M20/16 combi entries
- APO series continuous operating temperature: −25 to +70 °C
- APO series rated insulation voltage: 1,000 V AC / 1,500 V DC
- APO series impact resistance: Up to IK08
- Application: Modular electrical distribution and protection equipment
Reliable Modular Electrical Distribution and Equipment Protection
Modular electrical enclosures such as the ABB 856120 APO AP71DIN2 provide an organised and accessible housing for electrical distribution and protection equipment. The enclosure accommodates 28 standard modular units arranged across two DIN-rail rows, making it suitable for electrical assemblies containing miniature circuit breakers, residual current devices, isolators and other compatible modular components.
The ABB APO enclosure series is manufactured using glass-fibre reinforced polyester, a durable material offering excellent corrosion resistance and electrical insulation properties. ABB designs the APO range for demanding industrial environments, with series-level characteristics including double insulation, high mechanical durability and resistance to challenging operating conditions.
The transparent pivoting cover provides convenient visibility of installed modular devices, allowing operators and maintenance personnel to inspect equipment positions and indications without immediately opening the enclosure. When access is required, the cover can be opened to reach the operating fronts of the installed components.
The equipped enclosure arrangement includes a DIN-rail chassis, front plate and earthing terminal, supporting a professional modular distribution layout. The integrated cable entry provisions provide flexibility for routing incoming supply conductors and outgoing circuit wiring, subject to the selected glands, cable sizes and installation requirements.
With dimensions of 302 × 372 × 175 mm, the enclosure combines a practical mounting footprint with sufficient depth for compatible modular electrical equipment. Its RAL 7035 light grey polyester housing offers a clean industrial appearance and is suitable for use in appropriately designed electrical installations.
The wider ABB APO family includes enclosure solutions with ingress protection up to IP67 and impact resistance up to IK08. The protection rating applicable to the ABB 856120 must be established for its specific equipped configuration and completed installation, including the cover, cable entries and sealing arrangements.
Typical Applications
- Industrial electrical distribution boards.
- Commercial building electrical distribution systems.
- Miniature circuit breaker and residual current device assemblies.
- Modular DIN-rail electrical protection installations.
- Industrial machinery auxiliary distribution panels.
- Electrical switching and isolation equipment housing.
- Building services and infrastructure installations.
- Manufacturing plant electrical distribution systems.
- Workshop and maintenance electrical installations.
- OEM electrical control and distribution assemblies.
- Electrical installations requiring a compact 28-module enclosure.
- Professional surface-mounted electrical distribution applications.
