View stta2012 datasheet:

STTA2512P ? TURBOSWITCH ”A”. ULTRA-FAST HIGH VOLTAGE DIODE ? MAIN PRODUCT CHARACTERISTICS I 25A F(AV) K V 1200V RRM trr (typ) 60ns V (max) 1.9V F FEATURES AND BENEFITS A ULTRA-FAST, SOFT AND NOISE-FREE K RECOVERY. VERY LOW OVERALL POWER LOSSES IN BOTH THE DIODE AND THE COMPANION TRANSISTOR. SOD93 HIGH FREQUENCY AND/OR HIGH PULSED CURRENT OPERATIONS. CECC APPROVED. DESCRIPTION TURBOSWITCH 1200V drastically cuts losses in They are particularly suitable in Motor Control all high voltage operationswhich require extremely circuitries, or in the primary of SMPS as snubber, fast, soft and noise-free power diodes. Due to their clamping or demagnetizingdiodes, and also at the optimized switching performances they also highly secondary of SMPS as high voltage rectifier