Allen-Bradley Push Button 800T-N302A

1. General Description

The Allen‑Bradley Bulletin 800T series is Rockwell Automation’s classic 30 mm industrial push button product line, designed and constructed to withstand the most demanding industrial environments. Together with the 800H series, they form a complete 30 mm push button solution, recognised for robust performance, exceptional durability and aesthetic design.

The key difference between 800T and 800H lies in material and environmental protection:

2. Key Features

2.1 Rugged Construction

• One‑piece push button cap – made of thermoplastic polyester with colour markings that never fade; no risk of lost inserts.

• Actuator shaft – zinc/aluminium alloy casting ensures reliable performance.

• Operator bushing – die‑cast zinc/aluminium alloy for high strength and stability after installation.

• Baffle seal – provides full coverage to protect against liquids, particulates and corrosive agents.

• Return spring – stainless steel for continuous operation and extended service life.

• Four‑rivet reinforcement – the operator bushing, diaphragm seal and base plate are secured with four steel rivets to prevent disassembly and withstand shocks.

2.2 Extensive Contact Block Options

The 800T series offers various contact blocks for different applications:

• Standard contact blocks – rated up to 10 A, A600 rating; pure silver contacts resist corrosion; twin‑fork spring contacts improve reliability; transparent side covers allow visual inspection.

• PenTUFF™ contact blocks – rated up to 2.5 A, C300 rating; specially designed for low‑voltage switching (down to 5 V DC, 1 mA), ideal for PLC input circuits.

• Explosion‑proof contact blocks – certified for Class I Div. 2 (Groups A, B, C, D); positively driven NC contacts; comply with global emergency‑stop standards.

• Self‑Monitoring™ contact blocks – ensure forced opening of NC contacts during emergency stops; yellow‑coded for easy identification; meet safety circuit requirements.

2.3 Switch Safety Features

• Selector switches feature positive detent action to prevent the switch from stopping between two positions.

• Constant energy design minimises unintended contact state changes caused by accidental switching.

2.4 Global Approvals

Products carry multiple international certifications including ABS, CCC, CE, CSA, EAC, GOST, and UL.

3. Product Families and Types

The 800T series includes a full range of operator types:

3.1 Push Buttons

• Non‑illuminated – flush, extended, and other styles; colours include black, red, green, yellow, blue, grey, orange and white.

• Illuminated – LED light sources (12–130 V AC/DC universal wide‑voltage), transformer type (120 V AC); multiple colours available.

• Legends can be engraved: Start/Stop/Forward/Reverse/Jog/Up/Down/Reset, etc.

3.2 Selector Switches

• 2‑position, 3‑position, 4‑position and other configurations.

• Key‑operated (cylinder lock) versions available to prevent unauthorised operation.

3.3 Emergency Stops

• Trigger mechanisms include push‑pull, twist‑release, key‑release, and other styles.

• Safety contacts: double NC with forced opening; self‑monitoring option available.

3.4 Pilot Lights

• Available in 18 mm and 30 mm sizes.

• LED lamps; colours: red, green, yellow, orange, blue, white, clear.

• Standard and push‑to‑test types.

4. Technical Specifications

5. Selection and Application Guidelines

Selection Considerations

• Environmental conditions – for corrosive environments, prefer the 800H (plastic, Type 4/4X/13); for general industrial use, the 800T (metal) is suitable.

• Contact requirements – choose standard contacts for high‑current loads, PenTUFF contacts for low‑voltage PLC signals, and explosion‑proof or self‑monitoring contacts for safety applications.

• Installation – modular design allows flexible configuration and rapid assembly.

Typical Applications

• Factory automation control panels.

• Harsh environments (dust, moisture, vibration).

• Safety circuits and emergency‑stop systems.

• Explosion‑hazard areas such as petrochemical plants (Class I Div. 2).