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Allen-Bradley 440K-C21074
by Allen-Bradley
Read verified buyer reviews ↓OverviewThe Allen-Bradley 440K-C21074 Cadet 3 Tongue Safety Interlock Switch provides exceptional machine safeguarding in demanding industrial environments. This critical safety device protects both personnel and equipment by maintaining machinery in a secure state when access points are opened. Boasting a sturdy GD2 metal alignment guide and a responsive semi-flex actuator, this interlock switch delivers precise functionality and outstanding longevity, even with continuous use. Its carefully engineered configuration, including two normally closed (NC) safety contacts and one normally open (NO) auxiliary contact, enables essential safety interlocking and offers valuable status monitoring capabilities for enhanced operational awareness. The integrated 1/2-inch NPT adapter simplifies conduit connections, ensuring straightforward and dependable installation across various industrial settings.Key Features Cadet 3 Tongue Safety Interlock Switch: Specifically designed for critical machine safety, ensuring compliance and protection. GD2 Metal Alignment Guide: Provides superior precision and extended operational lifespan through robust metallic construction. Semi-Flex Actuator: Offers flexible yet secure engagement, adapting to minor misalignments for consistent safety. 2 NC Safety & 1 NO Auxiliary Contacts: Delivers dual-channel safety monitoring and convenient status indication. 1/2-inch NPT Adaptor: Facilitates quick and secure electrical conduit connections, enhancing installation efficiency. Industrial-Grade Construction: Built to withstand harsh industrial conditions, ensuring reliability and longevity. Enhanced Safety Compliance: Meets rigorous safety standards for optimal protection in hazardous environments. Technical Specifications Model: 440K-C21074 Series: Cadet 3 Switch Type: Tongue Safety Interlock Actuator Type: Semi-Flex Alignment Guide: GD2 Metal Contact Configuration: 2 Normally Closed (NC) Safety & 1 Normally Open (NO) Auxiliary Conduit Entry: 1/2" NPT Adaptor Brand: Allen-Bradley Applications Comprehensive machine guarding and robust safety interlocking systems. Critical industrial automation and robotic safety installations. Protection of hazardous equipment and machinery access points. Reliable access control for safety doors, gates, and panels. Integration into emergency stop circuits for enhanced safety protocols. Use in manufacturing, packaging, and assembly lines requiring stringent safety measures. Why Choose This Model?Unmatched Safety & ReliabilityThe 440K-C21074 ensures paramount safety with its dual NC contacts, designed to safeguard personnel and prevent unauthorized access.Durable & Long-LastingConstructed with industrial-grade materials and a GD2 metal alignment guide, this switch offers exceptional durability, minimizing downtime and maintenance.Simple & Efficient InstallationThe integrated 1/2" NPT adaptor streamlines the installation process, allowing for quick and secure conduit connections.Versatile ApplicationIdeal for a wide range of industrial settings, from machine guarding to robotic safety systems, providing flexible solutions for diverse needs.Trusted Allen-Bradley QualityBenefit from the renowned quality and engineering excellence of Allen-Bradley, a leader in industrial automation and safety.Compliance & Peace of MindInvest in a product that meets rigorous safety standards, offering peace of mind and contributing to a safer work environment.Order NowEnhance your industrial safety protocols with the Allen-Bradley 440K-C21074 Cadet 3 Tongue Safety Interlock Switch. Designed for optimal performance, durability, and ease of installation, this safety switch is an indispensable component for any modern industrial setup. Secure your machinery and protect your workforce by integrating this top-tier safety solution today.FAQWhat is the primary function of the Allen-Bradley 440K-C21074?Its primary function is to provide machine guarding and control, ensuring machinery remains safe when access points are opened, thereby protecting personnel and equipment.What kind of actuator does this switch use?This switch utilizes a semi-flex actuator which provides agile yet secure engagement, accommodating minor misalignments for consistent safety.How does the 1/2-inch NPT adaptor benefit installation?The 1/2-inch NPT adaptor simplifies conduit connections, making the installation process straightforward and reliable in various industrial environments.Can this safety interlock switch be used in harsh industrial conditions?Yes, it features industrial-grade construction specifically built to withstand harsh industrial conditions, ensuring reliability and longevity.What type of contact configuration does the 440K-C21074 have?It has two normally closed (NC) safety contacts and one normally open (NO) auxiliary contact, which enables dual-channel safety monitoring and status indication.
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Allen-Bradley 440K-C21074
Overview
This is a genuine Allen-Bradley component. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.
Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.
Key Features
- Genuine Allen-Bradley catalog part
- Tested before shipment
- Backed by PalmPartsSolution warranty
- Cross-reference and revision assistance available
- Compatible with the broader Allen-Bradley automation ecosystem
Compatibility
When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Allen-Bradley equipment. Where applicable, confirm:
- Input/output voltage and current rating
- Communication protocol and network role
- Mounting form factor and footprint
- Operating temperature, humidity, and IP rating
- Required certifications (UL, CE, ATEX, marine, etc.)
Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.
Replacement Information
Three ways to source this part through PalmPartsSolution:
- Exact replacement — same Allen-Bradley catalog number, new or refurbished, tested and warrantied
- Form-fit-function equivalent — alternate revision or build that drops in without code changes
- Engineered migration — current-generation Allen-Bradley platform with documented conversion notes
Contact our engineering team if you need help choosing between these tracks.
Technical Specifications
- Model: 440K-C21074
- Series: Cadet 3
- Switch Type: Tongue Safety Interlock
- Actuator Type: Semi-Flex
- Alignment Guide: GD2 Metal
- Contact Configuration: 2 Normally Closed (NC) Safety & 1 Normally Open (NO) Auxiliary
- Conduit Entry: 1/2" NPT Adaptor
- Brand: Allen-Bradley
Applications
- Comprehensive machine guarding and robust safety interlocking systems.
- Critical industrial automation and robotic safety installations.
- Protection of hazardous equipment and machinery access points.
- Reliable access control for safety doors, gates, and panels.
- Integration into emergency stop circuits for enhanced safety protocols.
- Use in manufacturing, packaging, and assembly lines requiring stringent safety measures.
Why Choose the 440K-C21074?
Unmatched Safety & Reliability
The 440K-C21074 ensures paramount safety with its dual NC contacts, designed to safeguard personnel and prevent unauthorized access.
Durable & Long-Lasting
Constructed with industrial-grade materials and a GD2 metal alignment guide, this switch offers exceptional durability, minimizing downtime and maintenance.
Simple & Efficient Installation
The integrated 1/2" NPT adaptor streamlines the installation process, allowing for quick and secure conduit connections.
Versatile Application
Ideal for a wide range of industrial settings, from machine guarding to robotic safety systems, providing flexible solutions for diverse needs.
Trusted Allen-Bradley Quality
Benefit from the renowned quality and engineering excellence of Allen-Bradley, a leader in industrial automation and safety.
Compliance & Peace of Mind
Invest in a product that meets rigorous safety standards, offering peace of mind and contributing to a safer work environment.
Availability & Shipping
- ▸In stock: 440K-C21074 ready for immediate dispatch from our Florida warehouse.
- ▸Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
- ▸Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
- ▸Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
- ▸Buy with confidence: Every 440K-C21074 ships with a 1-Year PALM Parts warranty and a 30-day return window.
Frequently Asked Questions — Allen-Bradley
Machine down? We ship parts the same day.
New, surplus, and refurbished Allen-Bradley inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.
Related Allen-Bradley resources
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Independent Supplier Notice
PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.
Product Condition & Firmware
All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.