Wöhner 31279 AMBUS Panel 2-pole DIN rail-mounted semiconductor fuse holder for 14 × 51 mm cylindrical fuse links rated at 50 A and 690 V AC.
£44.89
The Wöhner 31279 is a high-performance 2-pole DIN rail-mounted fuse holder for 14 × 51 mm cylindrical semiconductor fuse links. Designed for industrial power electronics, the holder provides reliable protection for sensitive semiconductor devices while offering fast installation, excellent conductor capacity and a compact footprint for modern control panels.
Rated at 50 A and 690 V AC, the Wöhner 31279 forms part of the proven AMBUS® Panel range. It is suitable for high-speed semiconductor fuse applications and supports installation on standard DIN mounting rails, making it ideal for OEM machinery, industrial automation and power distribution equipment.
Featuring touch-safe construction, an integrated label holder and a wide conductor clamping range, the Wöhner 31279 delivers dependable performance whilst simplifying installation and maintenance in demanding industrial environments.
The Wöhner 31279 is specifically designed for high-speed semiconductor fuse applications where rapid fault clearance is essential for protecting expensive electronic components such as IGBTs, SCRs, drives, inverters and rectifiers. The robust DIN rail-mounted construction provides dependable mechanical stability whilst maintaining excellent electrical performance.
Its compact 54 mm width allows efficient use of enclosure space while accommodating conductors up to 35 mm². The integrated label holder improves identification and maintenance within industrial control panels.
| Current | 50 A |
|---|---|
| Manufacturer | Wöhner |
| Product range | AMBUS® Panel |
| Model | 31279 |
| Full part number | 31279000 |
| Product type | Semiconductor fuse holder |
| Fuse-link size | 14 × 51 mm |
| Configuration | 2P |
| Rated current | 50 A |
| Rated voltage | 690 V AC |
| Rated insulation voltage | 800 V AC/DC |
| Rated impulse withstand voltage | 6 kV |
| Conditional short-circuit rating | 80 kA at 690 V (25 A fuse) |
| Approved fuse operating class | gG |
| Suitable semiconductor fuse classes | aR, gR and gRL |
| Permitted fuse-link power dissipation | 6.5 W |
| Typical power dissipation (80% load) | 1.2 W |
| Power dissipation at full load | 1.8 W |
| Dimensions (W × H × D) | 54 × 90 × 69 mm |
| Approximate weight | 202 g |
| Mounting | DIN rail |
| Connection capacity | 1.5–35 mm² (AWG 14–2) |
| Degree of protection | IP20 |
| Terminal type | Cage-clamp |
| Minimum operating temperature | -40°C |
| Halogen free | Yes |
| Pack size | 3 |
| EAN | 4021267312794 |
| ECLASS | 27142190 |
| ETIM | EC002705 |
| Approvals | IEC (CB), UL, CSA, CCC |
| Standards | IEC 60947-1:2020, IEC 60947-3:2020, UL 4248-1 |
| Type number | AES14x51 |
The holder is designed for 14 × 51 mm cylindrical fuse links manufactured to IEC / HD 60269-2.
The Wöhner 31279 has a rated current of 50 A.
This model features a 2-pole configuration.
Yes. It is designed for installation on standard DIN mounting rails.
Yes. The holder is specifically designed for semiconductor protection fuse applications and supports compatible aR, gR and gRL fuse links within the manufacturer's specified limits.
Wöhner AMBUS® Panel fuse holders are trusted worldwide by panel builders, OEMs and industrial engineers for delivering dependable, standards-compliant protection for modern electrical installations.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...