This is the datasheet of KKFFAA junction box. It has two versions with and without voltage selector. It can be used for 1-2 poles fuse, in standard and medical version. The rated current is 1-10A.
This handbook describes the Schurter KFA fuseholder series, covering both standard and medical versions. It includes ratings, leakage current limits, dielectric strength, operating temperature range, protection class, and terminal specifications.
The document also lists the physical dimensions, mounting options (snap‑in or screw‑on), variant part numbers, and wiring diagrams. Additional safety features such as the extra‑safe fuse drawer and compliance with IEC/EN standards are detailed.
| Rated Current (250 V) | 1‑10 A @ Ta 40 °C / 250 VAC; 50 Hz |
|---|---|
| Rated Current (125 V) | 1‑10 A @ Ta 40 °C / 125 VAC; 60 Hz |
| Leakage Current (standard) | < 0.5 mA (250 V / 60 Hz) |
| Leakage Current (medical) | < 5 pA (250 V / 60 Hz) |
| Dielectric Strength L‑N | > 1.7 kVDC |
| Dielectric Strength L‑N‑PE | > 2.7 kVDC |
| Operating Temperature | -25 °C to 85 °C |
| IP Protection Class | IP 40 |
| Terminal Size (quick‑connect) | 6.3 × 0.8 mm |
| Terminal Size (with voltage selector) | 4.8 × 0.8 mm |
| Screw‑on Mount Thickness | max 8 mm |
| Snap‑in Mount Thickness | 0.8 mm to 3 mm |
| Housing Material | Thermoplastic, Black, UL 94V‑0 |
The KFA series is rated for 1 – 10 A at 40 °C ambient temperature, with 250 VAC at 50 Hz or 125 VAC at 60 Hz depending on the version.
The KFA fuseholder has an IP 40 protection class according to IEC 60529.
Yes, medical versions such as the M5 and M80 variants are available and meet IEC/EN 60601‑1 requirements.
The fuse drawer features a finger‑grip that can be removed by hand without tools.