1.6 A · 31 mm Glass PCB Fuse (Anti‑Surge / Slow‑Blow)

Reliable PCB-Mount Fuse for Spa Control Boards and Electronics

This 1.6 amp, 31 mm-length glass fuse is a common replacement part for spa and hot tub circuit boards, particularly those made by Balboa and Waterway. The slow‑blow (also called anti‑surge) variant offers enhanced protection against brief current spikes while safeguarding longer-term operation.

Specifications

Rated Current: 1.6 A
Fuse Type: Slow‑blow (anti‑surge) glass tube fuse
Length: 31 mm (~1.22 inches)
Diameter: ~6 mm (standard 6×31 mm fuse tube)
Voltage Rating: Typically up to 250 VAC, used in PCB fuse holders
Mounting Style: Press-fit PCB fuse, commonly Balboa HTP‑type modules
Material: Glass tube with metal end caps, allowing visual inspection of fuse wire

Key Features & Benefits

Surge-Protected Design: The slow‑blow characteristic tolerates startup currents (such as pump motors or transformers) and prevents nuisance blowouts.
Clear Visual Monitoring: Transparent glass housing lets technicians see if the thin wire inside has opened (fused).
Compact PCB Mounting: Ideal for direct installation in control boards without external holders.
Cost‑Effective OEM Replacement: Commonly supplied in small spa electronics stores; a direct match for manufacturer spec 1.6 A, 31 mm fuses.

Typical Applications

Spa and hot tub control panels (e.g. Balboa FS‑type fuse circuits)
Low‑voltage water feature controllers or circuit protection boards
Replacement for blown PCB-mounted fuse in spa systems

Why This Fuse?

Accurately matches the Balboa 1.6 A, 31 mm glass PCB fuse frequently specified for spa boards
Offers reliable circuit protection with tolerance for brief motor startups
Easy to source and affordable