| RS Delivers | 392-8973 | 4.884 | 1 | 117 | | Siemens | | 4.884 @ 1 |
 | kempstoncontrols.co.uk | 3RH1921-1CA01 | 4.983381 | 1 | In Stock | | Siemens | | 4.983381 @ 1 |
| electricautomationnetwork.com | 3RH1921-1CA01 | 5.42 | 1 | In Stock | | SIEMENS | | 5.42 @ 1 |
 | BDI Express | 15056665 | 7.19384564 | 1 | In Stock | | SIEMENS | | 7.19384564 @ 1 |
 | bulbspro.com | 3RH1921-1CA01 | 9.05 | 1 | In Stock | | Siemens | | 9.05 @ 1 |
| hvacdiscountstore.com | SIE--3RH1921-1CA01 | 9.51 | 1 | In Stock | | SIEMENS INDUSTRIAL CONTROLS | | 9.51 @ 1 |
 | industrialstores.com | 3RH1921-1CA01 | 9.58 | 1 | 16 | | Siemens Industrial Controls | | 9.58 @ 1 |
 | Voomi Supply | 3RH1921-1CA01 | 10.99 | 1 | In Stock | | Siemens Industrial Controls | | 10.99 @ 1 |
 | Zoro | G7507643 | 11.19 | 1 | 64 | | Siemens | 0.04 | 11.19 @ 1 |
| Onlinecomponents.com | 3RH1921-1CA01 | 11.22 | 2 | 2 | | Siemens | | 11.22 @ 2 |
| Digi-Key | 14635799 | 12.38 | 1 | In Stock | | Siemens | | 12.38 @ 1 |
| Dale-Electric | 3RH1921-1CA01 | 13.44 | 1 | In Stock | | Siemens Industry, Inc. | | 13.44 @ 1 |
 | turtle.com | ITE 3RH1921-1CA01 | 15.41 | 1 | In Stock | | Siemens | | 15.41 @ 1 |
 | simsupply.com | ZO-G7507643 | 18.03 | 1 | 47 | | Siemens | | 18.03 @ 1 |
 | crescentelectric.com | 195872 | 18.54 | 1 | In Stock | | Siemens | | 18.54 @ 1 |
 | Task Surplus | HA0397-4D01 | 25.0 | 1 | In Stock | | SIEMENS | | 25.0 @ 1 |
 | controlparts.com | 3RH1921-1CA01 | 28.0 | 1 | In Stock | | SIEMENS | | 28.0 @ 1 |
 | TME | 3RH1921-1CA01 | 96.49 | 1 | 276 | | SIEMENS | | 96.49 @ 1 |
