The Ferraz Shawmut US101HEL is a single-pole modular fuse holder designed for DC applications up to 1000 V DC, making it ideal for photovoltaic installations and high-voltage DC distribution systems.

Part of the Modulo Star series by Ferraz Shawmut (now Mersen), this device is compatible with 10x38 mm cylindrical fuse links and ensures high electrical reliability and operational safety in compliance with international IEC and UL standards.

⚠️ This is a fuse-switch disconnector device and must not be operated under load, as clearly indicated on the front label.

⚙️ Technical Specifications

Brand: Ferraz Shawmut (Mersen)
Model: US101HEL
Series: Modulo Star
Type: Modular fuse holder
Number of poles: 1P
Fuse size: 10x38 mm
Mounting: DIN rail 35 mm
Marking: CE, cURus

🔌 Electrical Ratings

• Rated voltage: 1000 V DC

• Rated current: up to 32 A

• Utilization category: DC-20B

• Interrupting rating (UL): 100 kA RMS Sym

• Degree of protection: IP2

• Pollution degree: 2

• Conductor cross-section: 1 – 16 mm² (18 – 6 AWG)

• Tightening torque: 2.2 Nm (19 in-lbs)

• Conductor temperature rating: 75°C CU only

📜 Standards

• IEC 60947-3

• UL 512

🔎 Function

The device allows:

✔ Secure installation of 10x38 mm cylindrical fuses
✔ Overcurrent protection in DC systems
✔ Line isolation by fuse carrier removal
✔ Use in photovoltaic systems up to 1000 V DC

⚠️ Not a miniature circuit breaker.
⚠️ Must not be switched under load.

🏭 Applications

✔ Photovoltaic installations (string protection)
✔ DC combiner boxes
✔ Energy storage systems
✔ Industrial DC distribution
✔ Inverter DC-side protection

🛠 Installation

• Standard DIN rail mounting

• Screw terminal connections

• Use with 10x38 fuses rated for 1000 V DC

• Installation by qualified personnel only

📦 Condition

Used product in good cosmetic condition.
Technical inspection recommended before commissioning.

📦 Scope of Supply

• 1x Ferraz Shawmut US101HEL fuse holder
  (Fuse not included unless otherwise specified)

🚀 Commercial Summary

Professional 1000 V DC modular fuse holder for 10x38 mm fuse links, ideal for photovoltaic string protection and high-voltage DC applications. The Ferraz Shawmut US101HEL provides IEC and UL certified safety and reliability for demanding DC installations.