3RU21364HB0 Thermal Overload Relay
The 3RU21364HB0 is a Siemens thermal overload relay in the SIRIUS 3RU2 series, packaged in bulk and rated for 40–50 A overload protection of contactor-connected motor loads. It carries Active product status and ROHS3 Compliant marking.
Key Specifications
| Parameter | Value |
|---|---|
| Accessory Type | Thermal Overload Relay |
| Base Product Number | 3RU2136 |
| Current Range | 40–50 A |
| Encapsulation | Bulk |
| For Use With | Contactors |
| Manufacturer | Siemens |
| Package | Bulk |
| Product Status | Active |
| ROHS Value | ROHS3 Compliant |
| Series | SIRIUS 3RU2 |
| Overload Class | Class 10 |
| Connection Type | Screw |
The SIRIUS 3RU2 series thermal overload relays provide motor branch protection via bimetallic tripping elements. The Class 10 designation sets the trip threshold within approximately 10 seconds at 600% of full-load current, aligned with general-purpose motor protection.
Catalog Comparison
The table below presents in-catalog parts sharing the 3RU2136 base number and SIRIUS 3RU2 series. All comparison entries require the reader's own application qualification.
| Parameter | 3RU21364HB0 | 3RU21364FB0 | 3RU21364GB0 | 3RU21364JB0 |
|---|---|---|---|---|
| Current Range | 40–50 A | 28–40 A | 36–45 A | 54–65 A |
| Encapsulation | Bulk | Bulk | Bulk | Bulk |
| Series | SIRIUS 3RU2 | SIRIUS 3RU2 | SIRIUS 3RU2 | SIRIUS 3RU2 |
| Connection | Screw | Screw | Screw | Screw |
| Similarity | — | 0.928 | 0.928 | 0.928 |
Why These Parts Are Similar
All four parts (3RU21364HB0, 3RU21364FB0, 3RU21364GB0, 3RU21364JB0) share the same base product number 3RU2136, belong to the SIRIUS 3RU2 series, and use bulk packaging with screw-type terminals. They differ in the bimetallic overload setting range, which scales with the motor current window each unit is calibrated to protect.
- 3RU21364FB0 (28–40 A) covers a lower current band than the seed, serving smaller-frame motors in the same form factor.
- 3RU21364GB0 (36–45 A) overlaps the lower portion of the seed range; the two units share the 40 A boundary point.
- 3RU21364JB0 (54–65 A) steps up to the next current tier, maintaining the same series, packaging, and connection style.
Additional in-catalog parts at lower similarity (3RU21364HD0, 3RU21364AB0, 3RU21364KB0, 3RU21364BB0) share the thermal overload relay category and base number but differ in connection type (spring-type terminals) and lack the full set of shared spec keys needed for a direct table comparison.
Integration Notes
This relay mounts directly to compatible SIRIUS contactors within the 3RU2 family. Screw terminals support standard industrial wiring practice. Bulk packaging aligns with stock requirements for panel assembly operations. Overload setting must fall within the 40–50 A window for the specific motor being protected.