Mersen a25x35-4 Semiconductor Fuse 35A 250VAC

Product Description

The MERSEN a25x35-4 is a round, fast-acting semiconductor protection fuse rated at 35 amperes and 250 VAC. Part of the A25X AMP-TRAP series, it is designed to protect power semiconductors including diodes, phase-control SCRs, and similar power semiconductor devices used in heavy-duty rectifiers and high-power supply circuits. The fuse features a bolt-in blade terminal configuration, a 100 kiloampere (AC) interrupting rating, and a built-in blown-fuse indication. Electricians and power electronics technicians working on industrial drive and rectifier equipment rely on this fuse class for fast, reliable overcurrent protection of semiconductor components.

The a25x35-4 is intended for industrial applications requiring the protection of heavy-duty rectifiers and similar heavy power supplies. Typical installation scenarios include motor drive panels, power conversion equipment, and industrial control systems where semiconductor devices must be protected from damaging fault currents. The fast-acting characteristic ensures the fuse responds quickly enough to protect sensitive semiconductor junctions before thermal damage occurs.

Key Features

• Fast-acting semiconductor fuse type engineered for SCR, diode, and power semiconductor protection
• 35 ampere current rating at 250 VAC
• 100 kiloampere (AC) interrupting rating for high fault-current environments
• Bolt-in blade terminal type for secure, low-resistance panel mounting
• Built-in blown-fuse indication for quick visual fault identification
• UL listed

Compatibility

Designed as an OEM-style replacement for the A25X series semiconductor fuse family, intended for use in heavy-duty rectifier protection and similar heavy power supply applications requiring a 35-ampere, 250 VAC fast-acting semiconductor fuse.

Installation Notes

Installation should be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and lock out the circuit before removing or installing the fuse. Verify the panel and fuse holder accept the bolt-in blade terminal style and confirm the voltage and current ratings match the circuit requirements before installation. Do not substitute a standard time-delay or general-purpose fuse in applications requiring semiconductor-rated fuses.

Technical Specifications

• Current Rating: 35 amperes
• Voltage Rating: 250 VAC
• Interrupting Rating: 100 kiloampere (AC)
• Characteristics: Fast Acting
• Fuse Type: Round, Semiconductor
• Terminal Type: Blades, Bolt-In
• Indication Type: Blown-Fuse
• Length: 3.19 inches
• Diameter: 0.81 inches
• Approval: UL
• Series: A25X

Standard Information

• Brand: MERSEN
• Manufacturer Part Number: a25x35-4