Replacing a Stamford SX460 with an AS440: What Changes on the Bench
An SX460-to-AS440 swap is not a drop-in on paper. Both are half-wave phase-controlled thyristor regulators with the same ±1.0 % load regulation, but the AS440 shifts the sensing floor, halves thermal drift, adds droop CT and analogue inputs, and carries derating rules the SX460 sheet never mentions.
Read More »








































