Eaton Bussmann Series – Semiconductor Protection Fuses

Reliable Protection for Sensitive Power Electronics

Eaton Bussmann Semiconductor Protection Fuses are engineered to safeguard critical power electronic components such as diodes, thyristors (SCRs), IGBTs, and MOSFETs against overcurrent and short circuits. These ultra-fast fuses ensure rapid fault clearing and precise current limitation, preventing costly damage and system downtime.

Among Eaton’s semiconductor protection solutions, the BS88 series fuses are highly regarded for their durability and proven performance in industrial and utility applications worldwide.

⚙️ Technical Specifications

• Voltage Ratings:

  • From 240 V AC/DC up to 690 V AC/DC (depending on series)

• Current Ratings:

  • From 1 A up to 125 A continuous current, with some series extending higher

• Fuse Types:

  • BS88 Series Semiconductor Protection Fuses:

    • LET Series – High-speed semiconductor fuses with bolted tag contacts

    • FE Series – Compact semiconductor protection fuses

    • EET Series – Blade terminal fuses for industrial applications

• Response Time:

  • Ultra-fast acting with minimal let-through energy (I²t) for sensitive device protection

• Standards Compliance:

  • BS 88 Part 4 for semiconductor protection fuses

  • IEC 60269-4 gR/aR fuse classes

  • UL Recognized, CSA Certified

  • RoHS and CE compliant

🔌 BS88 Semiconductor Fuses – Features & Benefits

The BS88 series is a British Standard line of high rupturing capacity (HRC) fuses designed specifically for protecting power semiconductors:

• Compact, rugged construction optimized for industrial use

• Precise melting characteristics enabling consistent and reliable protection

• Available in a wide range of current ratings, typically from 1 A to 125 A and beyond (depending on series)

• High breaking capacity ensuring safe interruption of fault currents up to 80 kA

• Easily installed in BS88 fuse holders for fast and safe replacement

• Widely used in industrial drives, UPS systems, power supplies, and renewable energy converters

🧩 Typical Applications

• Industrial motor drives and inverters

• Uninterruptible Power Supplies (UPS)

• Solar and wind power converters

• Battery chargers and DC power systems

• Rail traction and transportation electronics

✅ Advantages of Eaton Bussmann BS88 Semiconductor Fuses

• Ultra-fast fault clearing protects expensive semiconductor devices

• Low let-through energy (I²t) reduces thermal stress and extends device lifespan

• Compliance with international and British standards ensures safety and reliability

• Broad range of sizes and ratings to fit various system requirements

• Proven reliability in harsh industrial environments

📦 Popular BS88 Semiconductor Fuse Part Numbers

• LET Series:

  • LET-10 – 690 V, 10 A

  • LET-20 – 690 V, 20 A

  • LET-63 – 690 V, 63 A

  • LET-100 – 690 V, 100 A

• FE Series:

  • FE-25 – 690 V, 25 A

  • FE-40 – 690 V, 40 A

• EET Series:

  • EET-20 – 690 V, 20 A

  • EET-32 – 690 V, 32 A

  • EET-63 – 690 V, 63 A

Eaton Bussmann BS88 semiconductor protection fuses provide fast, dependable protection for sensitive power electronics. Ideal for industrial automation, energy storage, and transportation systems, these fuses minimize downtime and protect your investment.

For detailed technical information, cross-reference support, or ordering assistance, contact our experts today.