Why Choose the Mersen K330128 High-Speed Semiconductor Fuse?
The Mersen K330128 (BS000UB69V100P) is a Protistor® NH000 square body high-speed semiconductor fuse engineered to protect sensitive semiconductor devices in industrial power conversion equipment. It features a 100 A current rating, 690 VAC IEC / UL voltage rating and includes a striker indicator with L-bracket terminals for reliable installation and fuse status indication.
Designed with an ultra-fast aR operating characteristic, the K330128 provides short-circuit protection for IGBTs, thyristors, diodes and other semiconductor devices while delivering low let-through energy and a high interrupting capacity. Silver-plated contact surfaces and solidified sand construction help ensure dependable performance in demanding industrial environments.
Manufactured as part of the trusted Mersen Protistor® range, this fuse complies with IEC 60269-4 semiconductor protection requirements and is ideal for use in variable speed drives, UPS systems, inverters, rectifiers and industrial power converters.
Integrated striker indicator for remote fuse indication.
Silver-plated contact surfaces for excellent conductivity.
Key Features
Manufacturer: Mersen
Manufacturer Part Number: K330128
Catalogue Number: BS000UB69V100P
Series: Protistor® Size NH000
Fuse Characteristic: aR Ultra Fast
Rated Current: 100 A
Rated Voltage AC: 690 VAC IEC / UL
Rated Voltage DC: 500 VDC UL
Terminal Style: L Brackets
Indicator: Striker
Typical Applications
Variable frequency drives (VFDs).
Industrial motor drives.
UPS systems.
Power converters.
Industrial inverters.
Rectifiers.
Soft starters.
DC drive systems.
Protection of IGBT, SCR, diode and thyristor assemblies.
Technical Specifications
Item number
K330128
Catalogue No
BS000UB69V100P
Description
Square Body High-Speed Fuse Protistor® Size NH 000 aR 690VAC IEC 100A With Striker L Brackets
EAN/UPC Code
3605340362251
Rated voltage AC UL
690 V
Rated voltage DC UL
500 V
Rated voltage AC IEC
690 V
Ampere Rating
100 A
RoHS Compliant
Yes
AC or DC
AC/DC
Speed/Characteristic
aR
Fuse Size
NH000
Mounting
Bolted
Clearing I2t At Rated Voltage
4200 A²s
Melting I2t
690 A²s
AC Max I.R./Breaking Capacity
I1: 200 kA
Max. Rated Breaking Capacity DC
55 kA @ 600 V, L/R = 12 ms
DC Min. Breaking Capacity (MBC)
20 kA @ 600 V, L/R = 12 ms
Indication System
Yes
Indication System Type
Striker
Connection/Terminal Material
Tin-Plated Copper
Connection/Terminal Type
L Brackets
Product Width
32 mm
Product Length
94 mm
Product Height
27 mm
Sell Pack Quantity
3 EA
Sell Pack Weight
0.4668 kg
Sell Pack Width
110 mm
Sell Pack Length
130 mm
Sell Pack Height
80 mm
Product group
Semiconductor Protection Fuses
Body/Insulating Material
Ceramic
Product Weight
0.1556 kg
Power Dissipation at Rated Current Value
23 W
HS Code
85361090
Country of Manufacture
Tunisia
Frequently Asked Questions
What is the Mersen K330128 used for?
The Mersen K330128 is a Protistor® NH000 ultra-fast aR semiconductor fuse designed to protect sensitive power semiconductor devices in industrial power conversion equipment.
What is the current rating of the K330128?
The fuse has a rated current of 100 A.
What voltage is the K330128 rated for?
The K330128 is rated for 690 VAC IEC / UL and 500 VDC UL.
Does the K330128 include a fuse indicator?
Yes. The fuse includes an integrated striker indicator for remote indication and maintenance monitoring.
Which applications is the K330128 suitable for?
Typical applications include variable speed drives, UPS systems, inverters, converters, rectifiers and other industrial power electronic equipment containing semiconductor devices.
Trusted Semiconductor Protection
Mersen Protistor® semiconductor fuses are recognised worldwide for delivering ultra-fast fault clearing, high interrupting capacity and dependable protection for modern power electronic equipment.
Item number
K330128
Catalogue No
BS000UB69V100P
Description
Square Body High-Speed Fuse Protistor® Size NH 000 aR 690VAC IEC 100A With Striker L Brackets
EAN/UPC Code
3605340362251
Rated voltage AC UL
690 V
Rated voltage DC UL
500 V
Rated voltage AC IEC
690 V
Ampere Rating
100 A
RoHS Compliant
Yes
AC or DC
AC/DC
Speed/Characteristic
aR
Fuse Size
NH000
Mounting
Bolted
Clearing I2t At Rated Voltage
4200 A²s
Melting I2t
690 A²s
AC Max I.R./Breaking Capacity
I1: 200 kA
Max. Rated Breaking Capacity DC
55 kA @ 600 V, L/R = 12 ms
DC Min. Breaking Capacity (MBC)
20 kA @ 600 V, L/R = 12 ms
Indication System
Yes
Indication System Type
Striker
Connection/Terminal Material
Tin-Plated Copper
Connection/Terminal Type
L Brackets
Product Width
32 mm
Product Length
94 mm
Product Height
27 mm
Sell Pack Quantity
3 EA
Sell Pack Weight
0.4668 kg
Sell Pack Width
110 mm
Sell Pack Length
130 mm
Sell Pack Height
80 mm
Product group
Semiconductor Protection Fuses
Body/Insulating Material
Ceramic
Product Weight
0.1556 kg
Power Dissipation at Rated Current Value
23 W
HS Code
85361090
Country of Manufacture
Tunisia
No documents available for this product.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...