Why Choose the Mersen B216109 RECTICUR DII Fuse Link?
The Mersen B216109, also identified by catalogue number DIIGR50V25, is a high-speed 25 A gR semiconductor protection fuse link designed to protect sensitive power electronic components against damaging overcurrents and short circuits. Part of the Mersen RECTICUR D range, it combines rapid fault interruption with the familiar screw-in DII fuse format.
This fuse link is rated for operation at up to 500 V AC and 440 V DC. Its gR full-range characteristic provides high-speed protection for semiconductor devices such as diodes, thyristors, rectifiers and the power components used within AC and DC motor drives.
The B216109 features a robust insulated body suitable for significant mechanical and thermal stresses. Nickel-plated or silver-plated copper alloy contacts, low power dissipation and a visible operating indicator help provide dependable performance and straightforward maintenance in industrial power conversion and automation equipment.
Key Advantages
- High-speed gR full-range semiconductor protection.
- 25 A rated current for power electronic circuits.
- Suitable for systems operating at up to 500 V AC or 440 V DC.
- 100 kA AC breaking capacity for high prospective fault currents.
- Compact DII screw-in format for compatible Diazed fuse systems.
- Low power dissipation supports efficient and reliable operation.
Key Features
- Mersen RECTICUR D gR series.
- DIIGR50V25 catalogue designation.
- 25 A rated current.
- 500 V AC and 440 V DC rated voltage.
- gR speed and utilisation characteristic.
- 100 kA rated AC breaking capacity.
- Special fuse-element design for rapid interruption of fault currents.
- Coloured top-contact indicator for operating-condition identification.
- Ageing-resistant insulated body.
High-Speed Protection for Power Electronics
Semiconductor devices can be damaged by overcurrents that occur too quickly for conventional circuit-protection devices to interrupt effectively. The Mersen B216109 uses a specially designed fuse element to restrict damaging let-through energy and rapidly disconnect the circuit when a serious fault occurs.
Its gR characteristic provides full-range semiconductor protection, covering both overload and short-circuit conditions. This makes the fuse suitable for protecting rectifiers, drive power stages and other sensitive electronic switching components in industrial electrical equipment.
Typical Applications
- AC and DC variable speed drives.
- Industrial rectifiers and power converters.
- Diode and thyristor protection.
- Semiconductor switching circuits.
- Industrial automation equipment.
- Power electronic control panels.
