Description
The MARS 83904 is a single-phase, 120 V surge protection device (SPD) built for furnaces, air handlers, and other HVAC electronics that can’t afford a voltage spike. Its thermally protected MOVs absorb transient energy before it reaches sensitive parts such as ECM motors, control boards, and transformers. Installation is contractor-friendly—just land the two pre-stripped leads and you’re done.
What the 83904 Shields
- 120 V ductless and package systems
- Furnaces and air handlers
- Inverter (VFD) boards
- ECM blower and condenser motors
- Control boards and relays
- Transformers and sensors
Key Features & Specs
Simple two-wire hookup with 10 in. pre-stripped leads
Green LED status light for instant health check
Thermally protected MOVs — fail-safe design prevents thermal runaway
Type 1 or Type 2 SPD; UL 1449 4th-Edition listed
120 V, single-phase, 50/60 Hz operation
Short-circuit current rating: 10,000 Amps
MCOV (L–N): 150 V | VPR (L–N): 700 V
3-year product warranty plus $7,500 connected-equipment guarantee
