Wöhner 31277 AMBUS Panel DIN rail-mounted 3-pole semiconductor fuse holder for 10 × 38 mm fuse links, rated 32 A and 690 V AC.
£20.95
The Wöhner 31277 is a high-quality DIN rail-mounted semiconductor fuse holder for 10 × 38 mm cylindrical fuse links. Featuring a 3-pole configuration, it is specifically designed for high-speed semiconductor protection in industrial control panels, power electronic equipment, automation systems and OEM machinery.
Rated at 32 A and 690 V AC, the Wöhner 31277 forms part of the AMBUS® Panel range and offers dependable protection for semiconductor fuse applications. Its compact design, large conductor clamping range and integrated label holder make installation straightforward whilst ensuring reliable long-term performance in demanding industrial environments.
Manufactured using halogen-free materials and approved to major international standards including IEC, UL, CSA and CCC, the Wöhner 31277 provides a professional solution wherever fast-acting semiconductor fuse protection is required.
Semiconductor fuse holders are designed for use with high-speed fuse links that protect sensitive power electronic equipment against destructive fault currents. Their rapid operation helps minimise damage to drives, inverters, rectifiers and other semiconductor devices, reducing maintenance costs and system downtime.
The Wöhner 31277 provides secure DIN rail installation together with dependable electrical and mechanical performance, making it suitable for industrial automation, machine building, power conversion systems and OEM electrical panels requiring three-phase semiconductor protection.
| Current | 30 A |
|---|---|
| Manufacturer | Wöhner |
| Product range | AMBUS® Panel |
| Model | 31277 |
| Full part number | 31277000 |
| Product type | Semiconductor fuse holder |
| Fuse-link size | 10 × 38 mm |
| Fuse-link standard | IEC / HD 60269-2 |
| Configuration | 3P |
| Rated current | 32 A |
| Rated voltage | 690 V AC |
| Rated insulation voltage (AC/DC) | 800 V |
| Rated impulse withstand voltage | 6 kV |
| Utilisation category | AC-22B (400 V) |
| Conditional short-circuit current | 50 kA at 690 V (10 A fuse) |
| Approved fuse operating class | gG (10 A), aR semiconductor fuse applications |
| Permitted fuse-link power dissipation | 4.3 W |
| Typical device power dissipation (80% load) | 0.6 W |
| Power dissipation at full load | 0.9 W |
| Dimensions (W × H × D) | 54 × 81 × 58 mm |
| Mounting | DIN rail |
| Connection capacity | 0.75–25 mm² (AWG 18–4) |
| Halogen free | Yes |
| Pack size | 4 |
| Approximate weight | 155 g |
| EAN | 4021267312770 |
| ETIM | EC002705 |
| ECLASS | 27142190 |
| Approvals | IEC (CB), UL, CSA, CCC |
| Standards | IEC 60947-1:2020, IEC 60947-3:2020 (AC ratings only), UL 4248-1 |
| Type number | AES10x38 |
The Wöhner 31277 is a DIN rail-mounted 3-pole semiconductor fuse holder designed for 10 × 38 mm cylindrical semiconductor protection fuse links.
The fuse holder has a 32 A rated current.
The Wöhner 31277 is rated for operation up to 690 V AC.
Yes. The holder is designed for installation on a standard DIN mounting rail.
It accepts 10 × 38 mm cylindrical semiconductor protection fuse links manufactured to IEC / HD 60269-2.
Wöhner semiconductor fuse holders are trusted by panel builders, OEM manufacturers and industrial engineers for protecting sensitive power electronic equipment in demanding industrial applications.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...