ProjectsPricingInsights

Best Alternatives to PTF-77

Package: PCB MountDongguan Xingfei Connector Co., Ltd.FusesFuse Size: 5x20 mmMounting Type: PCBCurrent Rating (UL): 20 ACurrent Rating (VDE): 6.3 AVoltage Rating: 250 VAC

PTF-77 is a 5x20mm PCB fuseholder rated 20A UL and 250VAC. Available alternates need footprint and rating review.

AI replacement insight

Electrical riskmedium

PTF-15 lowers UL current to 15A.

Package riskmedium

Pinout and hole pattern are not verified.

Firmware risklow

Passive holder, no firmware.

Sourcing risklow

Kept candidates are active and indexed.

Can it be replaced directly?

No verified pin-compatible replacement is confirmed from the provided data.

Best replacement path

Review PTF-15 first if lower 15A UL current is acceptable.

Main risk

Mechanical footprint and UL current rating are not fully verified.

Recommended alternatives

2
PTF-15 package
PTF-15

FC

Needs validationmedium risk

PTF-15 is a same-size PCB fuseholder candidate but has lower UL current and unverified pinout.

View details

Alternative comparison matrix

Feature / factorPTF-77PTF-15FH1-206WAlt 3Compatibility / risk
Application5x20 fuseholder5x20 fuseholder5x20 PCB holder5x20 fuseholder / 5x20 PCB holder — same fuse size; FH1-206W: same fuse size
PackagePCB MountPCB MountPCB MountPCB Mount — mount class only; FH1-206W: mount class only
Pinout2 pinsmissing2 pinsmissing / 2 pins — no pin count; FH1-206W: pin function unclear
Current20A UL / 6.3A VDE15A UL / 6.3A VDE10A15A UL / 6.3A VDE / 10A — UL derating; FH1-206W: large derating
Temperature-30 to +120C-30 to +120C0 to +85C-30 to +120C / 0 to +85C — range matches; FH1-206W: narrower range

Application & sourcing insights

Questions & answers

PTF-15 is the closest listed candidate, but it is lower at 15A UL and needs footprint review.