Mersen Protistor® BS17US25V35 (T076653) British Standard Fuse-Link 17x27 — 35A, 250 VAC aR Semiconductor Protection, Ceramic Body, Bolted L‑Bracket Terminals — Pack of 10

The Mersen Protistor® BS17US25V35 (item T076653) is a British Standard 17x27 fuse‑link engineered for semiconductor protection in industrial power systems. Designed to meet IEC 60269‑1/-4 and VDE 636‑23 requirements, this aR fuse‑link provides fast clearing characteristics suitable for protecting power semiconductors, rectifiers and converters at 250 VAC. Supplied in packs of ten (10).

Key specifications

• Manufacturer / Brand: Mersen (Protistor®)
• Item / Catalogue number: T076653 / BS17US25V35
• Product type: British Standard fuse‑link (17x27) — aR semiconductor protection
• Application: Semiconductor protection, power converters, rectifiers, industrial AC systems
• Ampere rating: 35 A
• Rated voltage (AC IEC / UL): 250 V AC (IEC); UL AC rating 250 V, UL DC rating 300 V
• Utilization category: aR (semiconductor protection)
• Fuse size: 17 x 27 mm (17x27)
• Construction / Body: Ceramic body (high mechanical and thermal stability)
• Connection / Terminal type: L‑bracket terminals, copper terminal material; bolted mounting
• Mounting: Bolted installation
• Clearing I2t at rated voltage: 330 A²s
• Melting I2t: 63 A²s
• Product dimensions: diameter 18.5 mm × length 54.4 mm
• Power dissipation at rated current: 6.5 W
• Sell pack quantity / Packaging: Pack of 10 (10 EA) — pack weight 0.276 kg; pack dimensions 188 × 68 × 24 mm
• Product weight (each): 0.0276 kg
• Compliance: RoHS compliant; IEC 60269; VDE 636‑23 referenced

Features & benefits

• aR time‑current characteristics optimized for rapid clearing of faults affecting power semiconductors.
• Ceramic body for reliable thermal performance and mechanical robustness.
• Bolted L‑bracket copper terminals provide secure electrical and mechanical connections.
• Compact 17x27 form factor compatible with BS17 holders.

Installation & safety notes

• Verify holder compatibility for 17x27 (BS17) fuse‑links and bolted L‑bracket connections.
• Use provided I2t values (melting and clearing) to coordinate protection and ensure selectivity.
• Apply 250 V AC rating for AC system design; for DC applications consider the 300 V UL DC rating.
• Refer to Mersen (Protistor®) datasheet for full time‑current curves, breaking capacity details and installation guidance.