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Ultrasafe 1000VDC
™

touch-safe fuseholder

a tool-free and touch-safe Design increases User safety
®
Mersen’s HelioProtection line of UltraSafe fuseholders deliver the function, safety and level of
circuit protection demanded by PV applications. Mersen specially selected enhanced materials
when designing this fuseholder in order to provide the level of reliability and system longevity
required under constant temperature fluctuation of typical PV sites while providing the level of
electrical insulation required for 1000VDC applications. The touch-safe design and tool-free fuse
change-outs increase user safety. Combine with Mersen’s HelioProtection HP6M or HP10M fuses
for industry leading PV circuit protection.

Catalog numbers & Descriptions additional specifications
Connector Type: Screw or WAGO CAGE CLAMP spring terminal
®
Ampere Voltage No. of Visual Terminal
Catalog No. Suggested Screw Torque: 14.75 in-lbs
Rating Rating Poles Indicator Type
Wire Range: 14 to 6 AWG Solid/Stranded Cu
USM1HEL No Load Break Disconnect: No
Screw
USM1IHEL Yes Max Power Losses: 3 watts
30A 1000VDC 1
USGM1HEL No Blown Fuse Indicator Operating Voltage: 350 to 1000VDC
Spring
USGM1IHEL Yes Recommended Fuse Usage: HP6M, HP10M
Flammability: UL94V0
spring type screw type

2.35in
59.7mm
.20in
5mm

3.43in
87mm

.10in
2.5mm .35in
1.54in 8.9mm
39mm
.68in
17.3mm
2.17in
55.2mm
ratings: approvals:
Volts : 1000VDC • UL Listed to Standard UL4248-18
Amps : 30A Maximum • CSA Certified C22.2
SCCR : 100kA

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