High-speed fuse designed for semiconductor protection with integrated striker indication and DIN 110 blades. Rated at 450A, 690VAC IEC and 700VAC UL.
£155.29
The Mersen Q300187 is a genuine Protistor® Size 32 square body high-speed semiconductor fuse designed to provide outstanding protection for sensitive power electronic equipment operating in demanding industrial applications. Identified by the catalogue number PC32UD69V450D1A, this ultra-fast aR characteristic fuse-link is engineered specifically to protect semiconductors including IGBTs, thyristors and diodes against damaging short-circuit currents.
As part of the trusted Mersen Protistor® Size 32 range, the Q300187 combines rapid fault clearing, low let-through energy and a high breaking capacity to maximise equipment reliability whilst minimising costly downtime. Its ceramic square body, silver-plated DIN 110 blade terminals and integrated striker indicator make it ideal for industrial power conversion systems.
With a 450 A current rating, 690 V AC IEC and 700 V AC UL voltage ratings, the Mersen Q300187 is ideally suited for protecting variable speed drives, UPS systems, inverters, converters and industrial motor control equipment.
Protistor® semiconductor fuses are specifically engineered to protect modern power electronic devices against destructive short-circuit currents. Their low let-through energy helps minimise equipment damage, reduce maintenance costs and maximise operational uptime.
The Mersen Protistor® range is widely specified for variable frequency drives, UPS systems, converters, renewable energy equipment, industrial motor drives and automation systems where dependable semiconductor protection is essential.
| Current | 11 A |
|---|---|
| Item number | Q300187 |
| Catalogue No | PC32UD69V450D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 32 aR 690VAC IEC 700VAC UL 450A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340324525 |
| Rated voltage AC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 450 A |
| RoHS Compliant | Yes |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 32 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 130 kA²s |
| Melting I2t | 22 kA²s |
| AC Max I.R./Breaking Capacity | I1: 200 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Copper |
| Connection/Terminal Type | DIN 110 Blades |
| Product Width | 59 mm |
| Product Length | 134.6 mm |
| Product Height | 65 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 1.6899 kg |
| Sell Pack Width | 145 mm |
| Sell Pack Length | 195 mm |
| Sell Pack Height | 78 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.5633 kg |
| Power Dissipation at Rated Current Value | 80 W |
| HS Code | 85361090 |
| Country of Manufacture | France |
The Mersen Q300187 is a high-speed semiconductor fuse designed to protect IGBTs, thyristors, diodes and other power semiconductor devices from damaging short-circuit currents.
The Mersen Q300187 has a 450 A rated current.
The fuse is rated for 690 V AC (IEC) and 700 V AC (UL).
The aR operating characteristic provides ultra-fast protection specifically for semiconductor devices against short-circuit faults.
Yes. The Q300187 incorporates an integrated striker indicator to simplify maintenance and fuse monitoring.
Mersen Protistor® semiconductor fuses are trusted by OEMs, panel builders and industrial engineers worldwide to protect modern power electronic equipment in demanding industrial environments.
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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...