Overload Relay Cross-Reference — Siemens 3RU/3RB, Schneider TeSys LRD, ABB TF, Eaton ZB by Setting Range

Overload Relay Cross-Reference

An overload relay is chosen by its current setting range (the motor full-load current must sit inside the range, ideally in the upper half), its trip class (Class 10 standard, 10A, 20 or 30 for heavy starting) and the contactor it mounts on. The table groups the catalogue by setting range so the equivalent Siemens 3RU2 (thermal) or 3RB3 (electronic), Schneider TeSys LRD, ABB TF42/TF65/TF96 or Eaton ZB12/ZB32/ZB65/ZB150 relay can be located. Setting ranges are quoted as in the manufacturer designation.

Mounting is contactor-family specific: 3RU21 fits 3RT201x/S00, 3RU22 fits 3RT202x/S0; LRD01–35 fit LC1D09–D38; TF42 fits AF09–AF38; ZB12 fits DILM7–15, ZB32 fits DILM17–32. Electronic relays (3RB3, LR9, EF, ZEB) offer wider ranges and phase-failure detection.

Coverage: 523 catalogue rows with a readable rating, of 587 in these categories. Each cell lists up to six part numbers per make; click a part number for the product page and a quotation.

up to 12 A

12–40 A

40–100 A

over 100 A

Part numbers and designations are those of the original manufacturers and are given for identification. cBallast is an independent supplier; confirm ratings against the nameplate of the installed equipment before ordering. Table generated from the cBallast catalogue on 2026-09-29.

Compiled by cBallast for identification and cross-reference. Part numbers, designations and trademarks belong to their respective manufacturers. Confirm ratings and dimensions against the manufacturer's current documentation and the nameplate of the installed equipment before ordering or installation.