Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE A 070 URD 32 TTI 0450 A070URD32TTI0450
Engineered for reliable protection of sensitive power semiconductor devices, the Square Body High-Speed Fuse Protistor® Size 32 delivers rapid response to overloads and faults in industrial and commercial applications. With a 450A rating, it supports systems up to 690VAC (IEC) and 700VAC (UL), ensuring enhanced circuit safety and minimal downtime.
£90.98
Why Choose the Mersen N300461 Protistor® High-Speed Fuse?
The Mersen N300461, catalogue number A070UD32TTI450, is a Protistor® Size 32 square body high-speed semiconductor protection fuse engineered to provide advanced short-circuit protection for sensitive power electronic equipment. With an ultra-fast aR operating characteristic, it is specifically designed to protect IGBTs, thyristors, diodes and other semiconductor devices used in industrial power conversion systems.
Rated at 450 A with a 690 V AC IEC / 700 V AC UL voltage rating, the N300461 combines high interrupting capacity with low let-through energy to minimise semiconductor damage during fault conditions. The fuse features flush-end UNC threaded terminals with an integrated striker indicator, providing reliable operation in demanding industrial applications.
Designed for maximum equipment reliability, the Mersen N300461 is ideally suited for variable speed drives, UPS systems, industrial converters, renewable energy equipment and motor control installations where rapid semiconductor protection is essential.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 450 A continuous current rating.
- 690 V AC IEC / 700 V AC UL operation.
- Protects IGBTs, thyristors, SCRs and semiconductor devices.
- Integrated striker indicator for remote status indication.
- Low I²t provides superior semiconductor protection.
- High 200 kA breaking capacity.
- Designed for demanding industrial power electronic applications.
Key Features
- Mersen Protistor® Size 32 series.
- Catalogue number A070UD32TTI450.
- 450 A rated current.
- 690 V AC IEC / 700 V AC UL.
- aR ultra-fast operating characteristic.
- Flush-end UNC threaded terminals.
- Silver-plated contact surfaces.
- Integrated striker indicator.
Reliable Protection for Industrial Power Electronics
Protistor® semiconductor fuses are specifically engineered to interrupt high fault currents before excessive thermal energy can damage expensive semiconductor devices. Their extremely fast response and low energy let-through help maximise equipment reliability while reducing maintenance costs and unplanned downtime.
The Mersen N300461 is widely specified by OEMs, machine builders and maintenance engineers for protecting variable speed drives, industrial inverters, UPS systems and other power conversion equipment requiring dependable semiconductor protection.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- UPS systems.
- Power converters.
- Renewable energy inverters.
- Servo drive systems.
- Industrial automation equipment.
- Semiconductor protection installations.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | N300461 | |
| Catalogue No | A070UD32TTI450 | |
| Description | Square Body High-Speed Fuse Protistor® Size 32 aR 690VAC IEC 700VAC UL 450A With Striker Flush ends UNC threads | |
| EAN/UPC Code | 3605340328813 | |
| 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 | |
| Design Details | Standard Terminal | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Brass | |
| Connection/Terminal Type | Flush ends | |
| Product Width | 59 mm | |
| Product Length | 50.6 mm | |
| Product Height | 65 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.8099 kg | |
| Sell Pack Width | 145 mm | |
| Sell Pack Length | 245 mm | |
| Sell Pack Height | 90 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.6033 kg | |
| Power Dissipation at Rated Current Value | 77 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen N300461 used for?
The Mersen N300461 protects semiconductor devices including IGBTs, thyristors, SCRs and diodes against damaging short-circuit faults in industrial power electronic equipment.
What is the current rating of the N300461?
The fuse has a continuous current rating of 450 A.
What voltage is the fuse rated for?
It is rated for 690 V AC (IEC) and 700 V AC (UL).
Does the N300461 include a striker indicator?
Yes. The fuse incorporates an integrated striker indicator that can be used with compatible microswitch accessories for remote indication.
What does the aR operating characteristic mean?
The aR characteristic identifies an ultra-fast semiconductor protection fuse designed specifically for short-circuit protection of sensitive power electronic devices.
Trusted by Industrial Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, machine builders and industrial maintenance engineers for protecting critical power electronic equipment with fast, reliable fault interruption.
