Hammond PFK6 Primary Fuse Kit

Product Description

The HAMMOND PFK6 is a primary fuse kit designed to provide overcurrent protection on the primary side of low-voltage transformers commonly found in HVAC control circuits. Primary fuse kits like this one are installed in line with the transformer primary winding to protect the transformer and upstream wiring from fault conditions. Licensed HVAC technicians and electricians install this type of kit during new installations, system upgrades, or as a replacement when an existing primary fuse holder or fuse assembly has failed. The PFK6 delivers a straightforward, code-friendly solution for adding or restoring primary-side protection to control transformers in forced-air, heat pump, and hydronic systems.

The HAMMOND PFK6 is suited for use in residential and light commercial HVAC applications where control transformer protection is required. It is typically installed at the transformer primary leads inside air handlers, furnace cabinets, or packaged units. Technicians select a primary fuse kit when the transformer lacks factory-installed primary protection or when an upgrade to a fused primary circuit is needed to meet local electrical code requirements or manufacturer recommendations.

Key Features

• Provides overcurrent protection on the primary side of HVAC control transformers
• Compatible with common low-voltage transformer primary wiring configurations
• Straightforward installation suitable for in-cabinet retrofit or new installation
• Helps meet NEC requirements for transformer primary protection in control circuits

Compatibility

Designed as an OEM-style replacement or add-on primary fuse kit for residential and light commercial HVAC control transformers requiring primary-side overcurrent protection.

Installation Notes

Installation should be performed by a licensed HVAC technician or electrician. Disconnect and lock out all power to the unit before working on any transformer or control circuit wiring. Verify that the fuse rating selected is appropriate for the transformer primary current draw per NEC guidelines. Do not restore power until all wiring connections are secure and the cabinet is properly closed.

Technical Specifications

• UPC: 80342307778

Standard Information

• Brand: HAMMOND
• Manufacturer Part Number: PFK6