Build a large custom Aiphone GT Series entrance station without cutting multiple recessed back boxes into the wall with the Aiphone GT-303HB 9-Module Hooded Surface Mount Box.

Designed for 3×3 modular GT Series entrance configurations, the GT-303HB provides space for up to nine standard modular positions arranged three across and three high.

The enclosure mounts directly to the wall and provides additional interior wiring space plus an integrated hood to help protect the entrance-station components from rain and exterior moisture.

Key Features

• Genuine Aiphone GT-303HB

• 9-module hooded surface-mount box

• 3×3 module layout

• Designed for Aiphone GT Series modular entrance stations

• Supports up to nine modular entrance positions

• Surface mounts directly to the wall

• Replaces recessed back boxes in the surface-mount configuration

• Integrated hood provides additional weather protection

• Interior space for entrance-station wiring

• Bottom openings provide moisture drainage

• Vandal-resistant construction

• Current product-specific specification lists zinc die-cast construction

• Includes mounting hardware

• Uses 8-32 screws with T-15 Torx heads

• No electrical power required

• TAA compliant

• Ideal for large direct-select and digital-directory entrance stations

Product Specifications

Manufacturer: Aiphone
Model: GT-303HB
Series: GT Series
Product Type: Hooded Surface-Mount Box
Module Capacity: 9 Modules
Layout: 3 × 3
Mounting: Surface Mount Directly to Wall
Material: Zinc Die Cast
Mounting Hardware: Included
Fastener Type: 8-32 with T-15 Torx Head
Height: 13-5/16"
Width: 16-3/4"
Depth: 2-11/16"
Metric Dimensions: 338 × 425 × 68 mm
Electrical Requirements: None
TAA Compliant: Yes
Country of Origin: Japan

3×3 Modular Layout

The GT-303HB is designed for large GT Series entrance stations requiring up to nine standard module positions.

The layout provides:

• 3 modules across

• 3 modules high

• 9 total module positions

This provides significantly more space than Aiphone's smaller single-column and two-column hooded enclosures.

Built for Large Custom Entrance Stations

The nine-module capacity allows installers to combine multiple types of GT entrance equipment in one organized assembly.

Potential components include:

• Camera modules

• Audio modules

• Tenant call buttons

• Digital tenant directory

• Numeric keypad

• Access-control keypad

• Card-reader module

• Blank filler panels

• Other compatible GT entrance components

The exact configuration is determined by the project requirements.

Hooded Surface-Mount Design

The GT-303HB combines a surface-mount enclosure and weather hood into one assembly.

The hood helps protect the installed GT entrance station from direct exposure to:

• Rain

• Dripping water

• Snow

• Exterior moisture

• Incidental weather

This makes the GT-303HB especially useful for exterior entrances where a recessed installation is not practical.

Moisture Drainage

Aiphone's GT-nHB hooded surface enclosures incorporate openings at the bottom to allow moisture to drain from the enclosure.

These drainage areas should remain unobstructed during installation.

Additional Wiring Space

The GT-303HB provides approximately 2-11/16" of enclosure depth, creating useful interior space for:

• Audio/data wiring

• Video wiring

• System power

• Door-release wiring

• Module interconnection cables

• Access-control wiring

• Relay connections

This can simplify large modular entrance installations where many conductors converge at the entrance panel.

Surface Mount Replaces Back Boxes

Aiphone identifies GT-nHB enclosures as surface-mount alternatives to the standard recessed back-box arrangement.

When using a GT-303HB, the modular entrance assembly mounts within the surface enclosure rather than requiring multiple recessed GF Series back boxes in the wall.

This is particularly useful for:

• Retrofit projects

• Concrete walls

• Block walls

• Limited wall cavities

• Existing buildings

• Locations where recessed boxes cannot easily be installed

Custom Audio Entrance Configuration

The GT-303HB can support large direct-select audio entrance stations built with components such as:

• GT-DB – Audio & Door Release Module

• GT-DBP – Audio Module Cover Panel

• GT-SW – 4-Call Switch Modules

• GF-1P – 1-Call Panel

• GF-2P – 2-Call Panel

• GF-3P – 3-Call Panel

• GF-4P – 4-Call Panel

Multiple call-switch modules can be installed when a larger number of tenants require individual direct-select buttons.

Custom Video Entrance Configuration

For video visitor identification, the enclosure can also accommodate:

• GT-VB – Camera Module

• GT-VP – Camera Module Panel

• GT-DB or GT-DB-VN – Audio Module

• GT-DBP – Audio Module Panel

• Tenant call-button modules

• Other compatible GT modules

The GT-VB provides wide-angle entrance video while the GT-DB handles audio and door-release functions.

Digital Directory Configuration

Large buildings can use the GT-303HB for entrance stations combining:

• GT-NSB – Digital Tenant Directory Module

• GT-NSP-L – Directory Cover Panel

• GT-10K – 10-Key Keypad Module

• GF-10KP – Keypad Cover Panel

• GT-DB / GT-DB-VN – Audio Module

• GT-DBP – Audio Panel

• Optional GT-VB camera section

A digital-directory entrance can provide:

• Tenant-name searching

• Direct tenant dialing

• Access-code entry

• Visitor communication

• Door release

• Video identification when a camera is included

Direct-Select & Digital Components Can Be Combined

Because the GT-303HB provides nine positions, the entrance can be customized with a combination of:

• Direct-select tenant call buttons

• Digital directory

• Numeric keypad

• Video camera

• Audio module

• Access-control equipment

• Blank filler panels

This makes the GT-303HB one of the most flexible GT Series surface-mount enclosure options.

GT-DB Audio Module

Custom GT Series entrance stations require an appropriate audio section.

Current options include:

• GT-DB – Audio & Door Release Module

• GT-DB-VN – Audio Module with NFC Reader

These are normally paired with:

GT-DBP – Audio Module Cover Panel

The audio module provides entrance communication and the primary door-release relay.

GT-VB Camera Module

For video systems, use:

• GT-VB – Camera Module

• GT-VP – Camera Module Panel

The GT-VB provides:

• Wide-angle video

• Digital pan

• Digital tilt

• Digital zoom

• Low-light illumination

Video distribution requires the appropriate GT Series video-bus equipment.

GT-SW Call Switch Module

The:

GT-SW – 4-Call Switch Module

can be used with exterior panels including:

• GF-1P

• GF-2P

• GF-3P

• GF-4P

Multiple GT-SW modules can be used in larger direct-select entrance designs.

GT-NSB Digital Directory

The:

GT-NSB – Digital Display / Tenant Directory Module

can store up to 500 tenant names / numbers in compatible GT Series configurations.

When combined with the:

GT-10K – 10-Key Keypad Module

visitors can directly enter tenant numbers and authorized users can enter access codes.

Access-Control Options

The additional module capacity can also accommodate compatible GT Series access-control components such as:

• GT-AC – Access Control Keypad Module

• GT-HID – HID ProxPoint Plus Card Reader Module

• GT-DB-VN – Audio Module with NFC Reader

Select access-control components according to the complete GT Series design.

Blank Filler Panels

Unused module positions can be closed using:

GF-BP – Blank Filler Panel

This allows the GT-303HB to be installed even when all nine module positions are not initially required.

Additional components can potentially be added later as the system expands.

Modular Front Frames

The GT-303HB is designed for a 3×3 GT modular entrance layout.

The modular sections are completed using the appropriate GT Series front-frame arrangement and individual exterior panels.

Front frames and modules are sold separately unless specifically included in a complete entrance kit.

Vandal-Resistant Construction

Aiphone identifies the GT-303HB as a vandal-resistant surface-mount box.

This makes it suitable for high-traffic entrances such as:

• Apartment buildings

• Condominium properties

• Commercial offices

• Student housing

• Senior-living communities

• Mixed-use developments

• Institutional properties

• Controlled-access facilities

No Electrical Power Required

The GT-303HB is a mechanical mounting enclosure.

It does not require:

• Electrical power

• Programming

• Network configuration

• Addressing

Electrical requirements depend entirely on the modules installed inside the enclosure.

Related Hooded Surface-Mount Boxes

Aiphone offers several GT Series enclosure sizes.

GT-102HB

2-Module / 1×2 Hooded Surface-Mount Box

GT-103HB

3-Module / 1×3 Hooded Surface-Mount Box

GT-104HB

4-Module / 1×4 Hooded Surface-Mount Box

GT-202HB

4-Module / 2×2 Hooded Surface-Mount Box

GT-203HB

6-Module / 2×3 Hooded Surface-Mount Box

GT-303HB

9-Module / 3×3 Hooded Surface-Mount Box

The GT-303HB provides the largest 3-row hooded surface configuration in this group.

GT-303HB vs. GT-203HB

GT-203HB

Provides:

6 module positions

in a:

2 × 3 layout

Dimensions:

13-5/16" H × 11-7/16" W

GT-303HB

Provides:

9 module positions

in a:

3 × 3 layout

Dimensions:

13-5/16" H × 16-3/4" W

Choose the GT-303HB when a third vertical column of modules is required.

TAA Compliant

Aiphone lists the GT-303HB as:

TAA Compliant

Aiphone's TAA product list identifies its country of origin as:

Japan

This can make it suitable for applicable government and institutional projects requiring TAA-compliant equipment.

Ideal Applications

• Large apartment buildings

• Condominium complexes

• Commercial office buildings

• Mixed-use developments

• Student housing

• Senior-living facilities

• Large tenant directories

• Multi-tenant entrances

• Direct-select intercom systems

• Digital-directory entrances

• Video intercom entrances

• Access-control entrances

• Exterior entrance stations

• Retrofit GT Series projects

• Locations where flush mounting is impractical

Important Ordering Information

This listing is for the GT-303HB 9-Module / 3×3 Hooded Surface-Mount Box only.

The enclosure does not include the intercom modules, exterior module panels, or front-frame components required to build the entrance station.

Components sold separately may include:

• Front frames

• GT-DB / GT-DB-VN audio module

• GT-DBP audio panel

• GT-VB camera module

• GT-VP camera panel

• GT-SW call switch modules

• GF call-button panels

• GT-NSB digital directory

• GT-NSP-L directory panel

• GT-10K keypad

• GF-10KP keypad panel

• GT-AC access keypad

• GT-HID card-reader module

• GF-BP blank panels

• Bus controllers

• Power supplies

• Intercom wiring

• Electric locking hardware

The GT-303HB is the surface-mount enclosure and replaces the recessed back-box arrangement for the corresponding 3×3 entrance configuration.