# Star Trac 9-3561-MUSAP0 Treadmill Power On Off Switch & Circuit Breaker (PP416)

\## Star Trac 9-3561-MUSAP0 Treadmill Power On/Off Switch & Circuit Breaker

The Star Trac 9-3561-MUSAP0 Treadmill Power On/Off Switch & Circuit Breaker is a replacement power-control component for a compatible Star Trac treadmill. This part combines the treadmill’s main power switch with a circuit breaker, allowing the machine to be switched on or off while providing the specified breaker function within the power system. If your treadmill’s original switch or breaker has become damaged, worn, or stopped working, this part may help restore the machine’s power-control function.

## Product Details and Benefits

This product is a \*\*power switch and circuit breaker assembly\*\* made for use with a Star Trac treadmill application. The power switch controls the electrical supply to the treadmill, while the circuit breaker forms part of the equipment’s electrical protection system. Replacing the complete component can be useful when the original assembly no longer operates correctly or needs replacement during treadmill repair.

The product is identified by the following details:

\- \*\*Brand:\*\* Star Trac  
\- \*\*Part number:\*\* 9-3561-MUSAP0  
\- \*\*Product type:\*\* Treadmill power on/off switch and circuit breaker  
\- \*\*Category:\*\* Power Switches  
\- \*\*SKU:\*\* PP416  
\- \*\*Barcode:\*\* PP416  
\- \*\*Condition:\*\* Preowned

As a combined switch and breaker, this replacement part addresses two related power-control functions in one component. It can help simplify parts identification when servicing a Star Trac treadmill that uses the 9-3561-MUSAP0 assembly. A matching replacement may also help avoid replacing unrelated electrical components when the fault is limited to the treadmill’s power switch or circuit-breaker unit.

## Compatibility and Applications

The Star Trac 9-3561-MUSAP0 is intended for the Star Trac treadmill application identified by part number \*\*9-3561-MUSAP0\*\*. It is used as a replacement for the treadmill’s original power on/off switch and circuit breaker.

This part is suitable for treadmill repair, maintenance, and replacement-part sourcing when the existing component matches the listed part number and configuration. The product page does not provide a complete list of compatible treadmill model names, serial-number ranges, dimensions, electrical ratings, or connector details. For that reason, compare the part number and the original component before ordering.

\## Why Choose This Replacement Part?

Choosing a correctly identified replacement power switch and circuit breaker can help you repair a treadmill without replacing the entire machine. This preowned Star Trac part may be useful for equipment owners, treadmill service technicians, fitness-equipment repair shops, and customers maintaining commercial or home-use exercise equipment.

The combined design also makes the product easier to identify when you need both the treadmill power switch and circuit-breaker function in the same assembly. Because it is preowned, inspect the item and compare it with your existing part to confirm that the condition and configuration meet your repair needs.

## Before You Buy

Verify that your treadmill uses \*\*Star Trac part number 9-3561-MUSAP0\*\* and that the original component is a combined power on/off switch and circuit breaker. Also compare the shape, connection points, markings, and overall configuration before installation. The listing does not state dimensions, material, electrical specifications, warranty coverage, or installation instructions. If you need those details, confirm them with a qualified treadmill technician or Star Trac equipment documentation before purchasing.

## Details

- **Price:** 49.99 USD
- **Vendor:** Star Trac
- **Type:** Power Switches
- **Tags:** All

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 49.99 USD | In stock |

## Images

- PP416
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## Additional Information

- **Condition:** PREOWNED

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> Source: [Cardio Equipment Parts](https://www.cardioequipmentparts.com/products/star-trac-9-3561-musap0-treadmill-power-on-off-switch-circuit-breaker-pp416)
> Updated: 2026-08-29