Siemens EQ8681 Molded Case Circuit Breaker
- 100A
- 2 Pole
- Bolt-On
Quantity
Siemens EQ8681 - 100A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for residential applications, the Siemens EQ8681 serves as a 100A primary disconnect for home electrical systems. This thermal-magnetic breaker provides essential long-time and instantaneous trip functions. It installs into Siemens EQ and Ultimate load centers, including PL, ES, PN, and SN series panels. For modern upgrades, this unit is commonly substituted by the MBK100A conversion kit. Rated at 22kAIC at 120/240V, this bolt-on main breaker ensures high-capacity fault clearing.Specifications
| Brand | Siemens |
|---|---|
| Part Number | EQ8681-R |
| Series | EQ |
| Amperage | 100A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120/240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens EQ Load Centers, Siemens Ultimate Load Centers (PL, ES, PN, SN) |
| Wire Gauge | 4 AWG - 3/0 AWG (Cu/Al) |
| Max Wire | 3/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Accessories | Lugs Included |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Main Breaker, Common Trip, High Interrupting Capacity |
Product FAQs
5 answersCan I use the EQ8681 in a GE or Eaton panel?
No. The Siemens EQ8681 is engineered specifically for Siemens EQ and Ultimate series load centers (including PL, ES, PN, and SN). Installing it in a GE, Eaton, or other third-party panel violates safety codes and can create electrical hazards.
Is there a modern conversion kit that replaces the EQ8681?
Yes. For modern panel upgrades or replacements, the EQ8681 is commonly substituted by the Siemens MBK100A main breaker conversion kit.
Is the EQ8681 rated for use as a primary disconnect?
Yes. The EQ8681 is UL 489 listed and engineered specifically to serve as a main breaker or primary disconnect in compatible Siemens residential and light commercial load centers.
How is the EQ8681 installed in the load center?
The EQ8681 is a bolt-on main breaker. It secures directly to the panel's bus connections using bolts, providing a highly secure and reliable connection for the primary electrical feed.
Why is it important to verify panel compatibility before installing the EQ8681?
Even if a breaker physically fits onto a bus bar, it must be UL-listed for that specific enclosure. Using the EQ8681 in unapproved panels can lead to poor contact points, arcing, overheating, and voided warranties. Always check your panel's compatibility chart.
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