The TeSys DF2JA1251 is a set of three NH2 DIN blade fuses with an aM (motor-protection) curve, rated 250 A at 690 V AC. These are the replaceable fuse links for a TeSys GS fuse switch disconnector — the part that actually opens under fault, not the holder. The aM curve means it's sized for motor starting inrush — it holds through the start surge but clears on a sustained overload or short circuit. For a 250 A line, that typically protects a large motor or a feeder group in an MCC bucket. NH2 blade size (DIN 43620) matches standard NH2 fuse bases. The set ships as three units, one per phase.
TeSys DF2JA1251 NH2 aM Blade Fuse, 250A 690VAC, Set of 3
MPNDF2JA1251
Obsolete
TeSys DF, NH2 aM blade fuse, 250 A, 690 V AC, set of 3, without striker.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Product / component type | Fuses |
| Series / range | TeSys |
| Parameter | Value |
|---|---|
| Rated operational voltage (Ue) | 690 V AC |
| Parameter | Value |
|---|---|
| Fuse size | NH2 |
| Fuse type | DIN |
| Fuse curve | AM |
| Quantity per set | Set of 3 |
| Range of product | DF |
| Device short name | blade fuse |
| Device application | Protection |
| Line rated current | 250 A |
Product details
Frequently asked questions
What is the closest alternative to DF2JA1251?
No official successor is named in the lifecycle record. The closest functional match would be another NH2 aM 250 A 690 V fuse link from the same TeSys GS range, but physical dimensions and striker options must be verified against the existing holder.
What range and category does DF2JA1251 belong to?
It belongs to the TeSys range and is classified under category 18402-WORLD SERVICE PARTS(CONTROL ACCESS).
MPN
DF2JA1251