Check the listing for details. General Electric - 6RS21SA10D10 - Selenium Rectifier. Thyrector, Absorber.. Condition: New – Open box. Listed at 24.98 USD. General Electric - 6RS21SA10D10 Selenium Rectifier, Overvoltage Absorber. Status: Discontinued Thyrector. Rectifier Voltage Snubber. Voltage Range: 250.0 Frequency: 40 Hz Current Rating: 3.0 Amps Current Interrupt Capacity: 12.0 Amps Max. element Material: Silicon Carbide Two stacks of 10, 1" plates. Nominal Dimensions: Overall Length 2.250", Overal diameter 1.688" Mounting Method: Through Bolt 2.250 Long X 0.164-32 threads Contacts: 2 Solder Leads. Manufactured in Ireland. NSN 5920-00-969-0462 - An item specifically designed to absorb and consume surges of voltage such as that resulting across contacts when breaking a circuit having an inductive load or a burst of static across a telephone receiver. It is connected in parallel with the item it is protecting. It may be made up of metallic rectifier cells or semiconductor devices connected back-to-back which may or may not be shunted by a capacitor. It may also be a single rectifier cell or semiconductor device shunted by a capacitor. Excludes metallic rectifiers which are rated for rectifying capabilities and all single unit semiconductor devices not shunted by a capacitor.