FSPD140 Siemens Whole House Surge Protection Device, 140kA Type 2 SPD, 120/240V

FSPD140 Siemens Whole House Surge Protection Device, 140kA Type 2 SPD, 120/240V

Worried about lightning storms, utility surges, or voltage spikes damaging your appliances and electronics? The Siemens FSPD140 is a whole house surge protection device that installs next to your electrical panel and shields everything connected to it. It is rated for 140kA of surge current per phase and works on standard 120/240V residential electrical systems.

This unit is a Type 2 SPD (surge protective device), meaning it is designed to be installed at your main panel by a licensed electrician. It also satisfies the surge protection rule in the 2020 and 2023 National Electrical Code for new homes and panel replacements. The weatherproof NEMA 4X housing means it can go indoors or outdoors, and indicator lights plus an audible alarm show whether your protection is active. If your home currently has the older Siemens FirstSurge FS140, the FSPD140 is the current model that takes its place.

Common Applications

• Whole house surge protection for homes with 120/240V electrical service
• Meeting National Electrical Code surge requirements on new builds and panel swaps
• Guarding TVs, computers, kitchen appliances, HVAC equipment, and EV chargers
• Outdoor installs at meter-main combos

Key Features

• 140kA surge rating: Strong protection for storm-prone areas
• Works with any panel brand: Mounts externally beside your existing load center
• Complete coverage: Protects all three electrical pathways (line to neutral, line to ground, neutral to ground)
• Easy status checks: Green lights mean protected, a red light and alarm mean it is time to replace
• Indoor or outdoor rated: Sealed NEMA 4X polycarbonate enclosure
• Built-in noise filtering: UL 1283 filtering helps clean up electrical interference

Specifications

• Manufacturer: Siemens
• Part Number: FSPD140
• Series: BoltShield FSPD
• SPD Type: UL Type 2
• Surge Current Rating: 140kA per phase
• System Voltage: 120/240V, 1-Phase, 3-Wire
• MCOV: 150V
• VPR: 700V L-N, 700V L-G, 700V N-G, 1200V L-L
• Nominal Discharge Current: 20kA
• Short Circuit Current Rating: 200kA
• Enclosure: Polycarbonate, NEMA 4X, indoor/outdoor
• Connection: Pre-wired 18 in #12 AWG leads through 3/4 in NPT nipple
• Standards: UL 1449 5th Ed., cULus, UL 1283, NEC Article 285

Product Identification

• Dimensions: 7.95 in x 3.06 in x 2.75 in
• Weight: 1.38 lb
• UPC: 195125326972
• GTIN: 00195125326972

FAQ

What does the FSPD140 actually protect?
Once installed at your main panel, it helps protect every circuit in the house, so appliances, electronics, and HVAC equipment all benefit from one device.

Do I need an electrician to install it?
Yes. This device wires directly into your electrical panel, so installation should be handled by a licensed electrician.

My home has the Siemens FS140. Is this the same thing?
The FSPD140 is the newer BoltShield model that replaced the FirstSurge FS140.

How will I know if it stops working?
The green indicator lights go out, a red light flashes, and an audible alarm sounds when the unit no longer provides protection and needs replacement.