Mersen D70QS300-4 High-Speed DC Semiconductor Fuse, 700VDC, 300A
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Mersen D70QS300-4 is a D70QS Series aR high-speed DC semiconductor fuse rated for 700VDC and 300A. This round-body fuse is used for DC circuit protection in high-power conversion and energy systems where verified fuse rating, interrupting performance, and body dimensions must be reviewed before replacement sourcing.
| Product ID / MPN | D70QS300-4 |
| Brand / Series / Category | Mersen D70QS Series aR high-speed DC semiconductor fuse |
| Main Electrical or Technical Ratings | 700VDC, 300A, L/R ≤1ms, 20kA interrupting capacity |
| Power Dissipation | 8.8W at 0.5 In |
| Minimum Breaking Capacity | 1580A |
| Maximum Time to Clear MBC | 140ms |
| Mechanical Specs | A 4.34 in / 110 mm; B 1.50 in / 38.1 mm; C 2.09 in / 53.1 mm; D 3.41 in / 86.6 mm; E 2.78 in / 70.6 mm; F 0.41 in / 10.4 mm; G 1.00 in / 25.4 mm; H 0.25 in / 6.4 mm |
| Weight | 0.26 kg |
| Standards / Certifications | UL Recognized, UL File E60314; REACH / RoHS compliant |
Typical applications include battery management and charging system protection, energy storage systems, electric energy storage, battery disconnect units, battery pack protection, DC fast-charging stations, backup protection for DC relays and disconnects, and inverter or variable speed drive protection at 700VDC or below.
Apexon Supply supports B2B replacement sourcing and technical alignment for the Mersen D70QS300-4 high-speed DC semiconductor fuse. Buyers should verify current rating, voltage rating, interrupting capacity, fuse body size, mounting dimensions, and application requirements before replacement.
Send the MPN, required quantity, and application requirements for RFQ support. Most qualified RFQs receive a response or quote within 12 hours.
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