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Allen Bradley

Allen Bradley 440K-E33078 Guardmaster Elf Tongue Interlock Switch

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ManufacturerAllen Bradley

Part number440K-E33078

Contact Configuration 2 NC Safety

Connection Type 4 Pin DC Micro QD (M12)

Enclosure Rating IP67

Material Plastic

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Veteran-owned

CAGE: 9NK75

2 NC Safety Contacts 4-Pin M12 Micro Connector IP67 Rated Plastic Enclosure Semi Flex GD2 Guide Actuator CCC, CUL, KC, UL Certified

Product description

The Allen-Bradley 440K-E33078 is a Guardmaster Elf tongue interlock switch, designed for robust safety applications in industrial environments. It features two normally closed (NC) safety contacts, ensuring that machinery is safely powered down when access points are opened. The switch uses a 4-pin M12 Micro connector for reliable and quick connections.

Constructed with a durable plastic enclosure and an IP67 rating, this switch is resistant to dust and water, making it suitable for harsh conditions. It is typically used on machine guards, doors, and access panels to ensure operational safety and compliance. This model is compliant with CCC, CUL, KC, and UL standards.

Stanlo Automation, a veteran-owned surplus distributor, offers the Allen-Bradley 440K-E33078. We provide reliable access to quality industrial automation components and strive to meet your MRO needs with exceptional service.

Technical specifications

Contact Configuration	2 NC Safety
Connection Type	4 Pin DC Micro QD (M12)
Enclosure Rating	IP67
Material	Plastic
Standard	CCC, CUL, KC, UL
Actuator	Semi Flex With GD2 Guide

Common applications

Machine Guard Monitoring

Access Control

Industrial Safety

Manufacturing Equipment

Automation Systems

Hazardous Environments

Compatible systems

Machine safety guard interlocking systems

Also known as

440K-E33078 Safety Switch Allen Bradley Elf Interlock Guardmaster M12 Switch

Replaces / compatible with

This interlock switch is designed to ensure that machinery remains in a safe state when access doors or guards are opened.

Technical note

Expert tip

The semi-flex GD2 guide actuator ensures reliable engagement with the switch mechanism, even with slight guard misalignment.

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Frequently asked questions

What are the contact specifications for the Allen-Bradley 440K-E33078?

The Allen-Bradley 440K-E33078 features two normally closed (NC) safety contacts. These contacts are essential for safety interlock circuits, providing a direct pathway to shut down equipment when a guard is compromised.