Sertec is a stocking location of the Schweitzer type SEL-121B Relay, Catalog Number: 121B00-4256MHSB. We are also setup to recondition, repair, and re-calibrate your existing type SEL-121B Relay. All Schweitzer type SEL-121B Relay comes with a full one year warranty.
Please send us an email inquiry at sertec@cbsalesne.com or call us 24/7. Call 203-888-7500!