Mersen D121GC75V250EF Semiconductor Fuse, 750 VDC, 250 A
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Mersen D121GC75V250EF is a Protistor® size 121 gR semiconductor protection fuse-link for DC circuit protection. Item number M085203 identifies the 250 A version with 750 VDC IEC rating, type EF blade contacts, and striker configuration for industrial power and semiconductor protection applications.
| Product ID / MPN | D121GC75V250EF |
| Secondary ID | M085203 |
| Brand / Series / Category | Mersen Protistor® size 121 gR semiconductor protection fuse |
| Rated Voltage DC | 750 VDC IEC |
| Rated Current | 250 A |
| Speed / Characteristic | gR |
| Pre-arcing I²t | 18.05 kA²s |
| Rated Breaking Capacity DC | 100 kA |
| Max. I²t at 900 V, L/R=40 ms, IP=50In | 250 kA²s |
| Max. I²t at 900 V, L/R=40 ms, IP=10In | 1250 kA²s |
| Power Dissipation at In | 46.7 W |
| Power Dissipation at 0.8 In | 25.5 W |
| Mounting / Terminal / Connection | Type EF blade contacts with striker |
| Weight | 1.02 kg |
| Standards / Certifications | IEC 60269-4 Compliance |
Typical applications include protection of inverters, motor drives, UPS systems, railway power and auxiliary circuits, and similar equipment rated at 750 VDC or less.
Apexon Supply supports B2B sourcing and replacement review for Mersen D121GC75V250EF semiconductor fuses. Buyers should verify current rating, voltage rating, breaking capacity, gR characteristic, size 121 body style, and EF blade contact configuration before replacement.
Send the MPN, item number M085203, required quantity, and application requirements for RFQ support. Most qualified RFQs receive a response or quote within 12 hours.
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