Original: B1115LC180, Thyristor(SCR) PUK 756 Amp, 1800V, 58/26, See B1230LC160 for drop in replacement Optimized: B1115LC180 High Power Thyristor (SCR) - 756A 1800V PUK Module, 58/26 Standard, Compatible with B1230LC160 Replacement - Ideal for Industrial Motor Controls, Power Supplies, and Heavy-Duty Electrical Systems