Product Overview
Hollyland 51S Series 3 Amp 250VAC Time-Delay Miniature Cartridge Fuse
Condition
Unused new old stock (NOS). Metal end caps are stamped with 51S, 3A, 250V, and a circular UL recognition mark. Internal element is intact with visible solder beads. Single piece per order.
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Product Overview
Hollyland 51S-030H is a standard 5x20 mm miniature slow-blow (time-delay) glass cartridge fuse rated for 3 amps at 250 VAC. Built with nickel-plated brass caps on a clear glass body, this fuse provides surge-tolerant circuit protection for power supplies, audio gear, lab instrumentation, and industrial control equipment that encounter transient inrush currents on startup.
Key Features
- Slow-blow (time-delay) trip characteristics to absorb startup inrush without nuisance blowing
- Current rating: 3 A
- Voltage rating: 250 VAC
- Standard miniature physical size: 5 mm diameter by 20 mm length
- Clear glass cartridge construction for fast visual verification of element status
- Nickel-plated brass termination caps stamped with ratings and UL recognition marking
Applications
- Restoring factory circuit protection in vintage audio amplifiers, linear power supplies, and test gear requiring 5x20mm time-delay fuses.
- Replacing blown line fuses on bench equipment, power distribution strips, and industrial control panels.
- Protecting DIY electronic builds, transformer primaries, and motor circuits prone to harmless turn-on surges.
Frequently Asked Questions
Is this fuse fast-acting or slow-blow?
This is a slow-blow (time-delay) fuse from the Hollyland 51S series. The internal wire element features bead construction designed to tolerate momentary startup current spikes without opening prematurely.
What are the physical dimensions?
It measures the standard miniature cartridge size of 5 mm in diameter and 20 mm in overall length.
Why buy counted pieces from PartsMine instead of a bulk variety pack?
Most bulk assortments give you two or three fuses you actually need and dozens you will never touch. Buying individual pieces gives you the exact 3A 250V time-delay rating required for your circuit, visually inspected with intact internal elements. More pieces cost less each, and the price-break table on this page shows what each quantity costs.
When an inrush surge hits on startup, the right time-delay fuse holds the line so your repair stays finished.
Shipping? $8 flat rate, free once your order passes $28 - and it leaves the Idaho warehouse the same or next business day.
