Tulip Contact 1250A

The 1250A tulip contact is one of the most common ratings in MV switchgear. It covers feeder breakers, transformer-tap VCBs, and bus-tie applications in distribution and small substation environments. Multi-finger plug-in design with silver-plated copper fingers; spring-loaded for repeatable contact pressure across thousands of insertion cycles.

We supply this rating in standard finger counts and to custom drawings. If your design is established (existing OEM drawing or sample), we can match dimensions exactly. If you're designing fresh, the finger count and ring geometry default to industry-typical values for 1250A duty.

Specifications

Property	Value
Rated Current	1250 A (continuous)
Finger Material	Copper or copper alloy, silver-plated
Finger Count	Per drawing
Spring Material	Stainless steel or spring bronze
Spring Configuration	Per drawing
Ring / Housing	Copper, bronze, or aluminum alloy per design
Mating Stud Diameter	Per drawing
Silver Plating Thickness	Per drawing
Working Voltage	Common MV ratings: 12 / 24 / 40.5 kV
Insertion Cycles	Application-specific; depends on plating wear and spring fatigue

Exact certified properties for your lot are available with material documentation on request.

Applications

• Withdrawable VCB at 1250A continuous current rating (12 / 24 / 40.5 kV)
• Feeder and bus-tie breaker cubicles in MV switchgear
• Cassette-style switchgear with 1250A plug-in assemblies
• Replacement contacts for installed 1250A withdrawable breaker fleets

Technical Notes

The 1250A current rating is reached by parallel finger paths rather than a single high-current contact. Each finger carries a fraction of the total current; the finger count and contact pressure together determine the rating. More fingers spread current more evenly but increase cost and assembly complexity.

For new designs at 1250A, the finger count should be specified based on the application's duty cycle and ambient conditions. A high-ambient or high-cycle environment benefits from more fingers; a benign substation environment can use fewer. We can recommend a finger count for your specifications.

Silver plating thickness affects contact resistance over the insertion cycle life, thicker plating tolerates more wear before contact resistance rises. Standard plating thickness is per drawing or per request.

Sourcing & OEM

Custom 1250A tulip contacts to your drawing are routine. Plating thickness, finger count, spring tension, and ring geometry are all per specification; contact us with your drawing or sample for a project-specific quote.