QSA 5x20mm Fast Blow FuseQSA 5x20mm Fast Blow Fuse The QSA 5x20mm fast blow fuse brings the same MMMAT and MAT treatment as the slow blow version to components requiring fast blow protection. The treatment is the same; the fuse element characteristics are appropriate for fast blow applications. "Many high end audio tweaks I've heard sound great, but none have matched QSA's remarkable performance. I repeat, none." Clement Perry, StereoTimes Fast Blow vs. Slow Blow Fast blow

QSA 5x20mm Fast Blow Fuse

The QSA 5x20mm fast blow fuse brings the same MMMAT and MAT treatment as the slow blow version to components requiring fast-blow protection. The treatment is the same; the fuse element characteristics are appropriate for fast-blow applications.

"Many high-end audio tweaks I've heard sound great, but none have matched QSA's remarkable performance. I repeat, none." — Clement Perry, StereoTimes

Fast Blow vs. Slow Blow

Fast blow fuses respond immediately to overcurrent events. They're required in components where the protection circuit demands near-instant response — typically in the signal path rather than the AC mains input. Before ordering, confirm your component requires a fast blow fuse rather than slow blow. The component's manual or the fuse itself will specify this.

The Treatment

MMMAT (Musical Metal Molecule Alignment Technology) and MAT (Metal Active Technology) applied to the fuse element. More efficient electron flow, greater conductivity, elimination of narrow-band distortions — the same result as the slow blow version, appropriate for fast-blow applications.

Specifications

• Size: 5x20mm
• Type: Fast blow
• Levels: Yellow through Gold
• Note: Special order, non-returnable, trade-up eligible
• Confirm fast blow requirement before ordering

Not sure which amperage, type, or level? Reach out — we'll help you get it right before you order.