ABB ZLBM3-L-1P-3U-M12 InLine II three-pole 630 A low-profile fuse switch disconnector with a single operating handle, M12 bolted terminals and compatibility with DIN NH3 fuse links.
£614.44
The ABB ZLBM3-L-1P-3U-M12, product code 1SEP620173R1200, is a heavy-duty three-pole fuse switch disconnector from the established ABB InLine II range. Designed for switching, isolation and fuse protection in high-current low-voltage systems, it provides a dependable solution for industrial switchboards, distribution assemblies and infrastructure installations.
This low-profile model combines three-pole operation with a single operating handle and secure M12 bolted terminals. Its vertical construction and standard 185 mm phase spacing support efficient integration into modern distribution boards, while the bolted connections are suitable for securely terminating aluminium or copper conductors.
With a main-circuit rated current of 630 A, compatibility with DIN NH3 fuse links and a rated operational voltage of up to 1000 V AC, the ZLBM3-L-1P-3U-M12 is engineered for demanding three-phase applications requiring reliable isolation, high fault protection and long-term operational performance.
A fuse switch disconnector combines manual circuit switching, visible isolation and overcurrent protection within one coordinated device. When fitted with correctly selected NH3 fuse links, the ABB ZLBM3-L-1P-3U-M12 helps protect cables, busbar systems and connected equipment against overload and short-circuit conditions.
The single-handle mechanism operates all three phases together, supporting straightforward and controlled isolation of three-phase circuits. Its M12 bolted terminals and 185 mm phase spacing make the unit particularly suitable for high-current switchboard assemblies where robust electrical connections and efficient panel integration are required.
| Phase | Single Phase |
|---|---|
| Manufacturer | ABB |
| Series | InLine II |
| Model | ZLBM3-L-1P-3U-M12 |
| Product code | 1SEP620173R1200 |
| EAN | 7025840093183 |
| Product type | Fuse switch disconnector |
| Construction | Low-profile vertical design |
| Rated current | 630 A |
| Rated operational voltage | Up to 1000 V AC |
| Rated insulation voltage (Ui) | 1000 V |
| Rated impulse withstand voltage (Uimp) | 8 kV |
| Rated operational current, AC-20B | 630 A at 400–690 V; 400 A at 800 V |
| Rated operational current, AC-21B | 630 A at 400–690 V; 400 A at 800 V |
| Rated operational current, AC-22B | 630 A at 400–690 V and 1000 V; 400 A at 800 V |
| Rated operational current, AC-23B | 630 A at 400 V |
| Number of poles | 3 |
| Handle type | Single-pole operating handle |
| Fuse size | NH3 |
| Fuse system | DIN |
| Terminal type | M12 bolted terminals |
| Terminal tightening torque | 25 Nm |
| Distance between phases | 185 mm |
| Front protection rating | IP30 |
| Power loss at rated load | 97.2 W |
| Electronic fuse monitoring | No |
| Applicable standard | IEC 60947-3 |
| Dimensions (H × W × D) | 763 × 99 × 174 mm |
| Net weight | Approx. 4.65 kg |
| Country of origin | Bulgaria |
It is used for switching, isolating and protecting high-current three-phase circuits in industrial and commercial low-voltage distribution systems.
The ABB ZLBM3-L-1P-3U-M12 has a main-circuit rated current of 630 A.
This fuse switch disconnector is designed for use with DIN NH3 fuse links. Fuse ratings must be selected to suit the circuit and application requirements.
The single operating handle controls the switching of all three poles together, allowing the three-phase circuit to be connected or isolated through one coordinated action.
The unit uses M12 bolted terminals with a specified tightening torque of 25 Nm, providing secure connections for appropriately prepared conductors.
Yes. The device has a rated operational voltage of up to 1000 V AC, although the applicable operational current depends on the utilisation category and system voltage.
ABB InLine II fuse switch disconnectors are specified by switchboard manufacturers, electrical engineers and infrastructure operators for dependable circuit isolation and fuse protection in demanding low-voltage distribution systems.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...