# Siemens' UL 1077 Supplementary Protectors are designed to provide additional protection along with a branch circuit protection device. Since our Supplementary protectors are made to trip faster than a standard UL 489 Circuit Breaker they are able to provide additional protection for more sensitive devices inside the panel. Supplementary protectors can used in a number of industrial applications such as to provide selectivity for multiple motor control circuits on the secondary side of a control transformer or power supply by allowing the user to quickly find the problem circuit should a fault occur without having to shut down all of the other control circuits. Supplementary protectors may also be used as a local disconnecting means inside the panel when a branch circuit protection device is already present. Supplementary protectors are equipped with a delayed overload/time-dependent thermal release (thermal bimetal) for low over currents and with an instantaneous electromagnetic release for high overload and short-circuit currents. The thermal trip point on all versions is 1.13 to 1.45 times the supplementary protector rating.

**Manufacturer:** Siemens  
**MPN:** `B000UW2W8G`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Siemens |
| Manufacturer name | Siemens |
| Manufacturer | Siemens |
| dataSource | amazonScraper |
| moq | 1 |
| multiple | 1 |
| qtyInStock | 0 |
| tierMinQty1 | 1 |
| tierPrice1 | 64.13 |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Amazon | B000UW2W8G | 64.13 | 1 | None | 1 |
| Zoro | G7621616 | 87.15 | 1 | None | 1 |
| Allied Electronics | 72040079 |  |  | None | 1 |
| sustainablesupply.com | C1186480 | 138.84 | 1 | None | 1 |
| motorsandcontrol.com | 5SY6210-7 | 64.42 | 1 | None | 1 |
| RS Delivers | 196-3629 |  |  | None | 1 |
| us.rs-online.com | 72040079 | 77.3 | 1 | None | 1 |

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Structured data: `/python/html6/product/500/101000000/101046500/part_--B000UW2W8G---Siemens--f4e3efd247.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp