SP240V50KA 240V Split-Phase 50kA Type 1 Whole-House Surge Protector
$89.00
Key benefits
Type 1 whole-home protection for 120/240V split-phase service (service entrance / panel)
50 kA per phase surge current capacity
Nominal Discharge Current (In): 10 kA (UL 1449 performance metric)
100 kA SCCR (RMS symmetrical) for high fault-current environments
Low VPR: 1000V L-L / 500V L-G to help protect sensitive electronics
NEMA 4X / IP67, V-0 enclosure for durable indoor/outdoor installation
Pre-wired with 36″ of 12 AWG leads for flexible mounting and clean routing
Status LED: Green = Protected, Off = Replace
Backed by a 5-year warranty
Listings & Compliance
Intertek ETL Listed to UL 1449 (5th Edition)
Certified to CSA C22.2 No. 269.1 & 269.2
EMC Tested: FCC 47 CFR Part 15 (2024) and ICES-003 (2020)
Specifications
Electrical system: 120/240V split-phase, 50/60 Hz
SPD Type: Type 1
Surge current capacity: 50 kA per phase
Nominal Discharge Current (In): 10 kA
SCCR: 100 kA RMS symmetrical
MCOV: 300 VAC L-L / 150 VAC L-G
VPR: 1000V L-L / 500V L-G
Protection modes: 3 (L1–L2, L1–G, L2–G)
Response time: as fast as 500 picoseconds
Enclosure: NEMA 4X / IP67, flammability V-0 housing
Wiring: 36 inches, 12 AWG leads (pre-wired)
Warranty: 5 years
Bad Wolf SP240V50KA — 120/240V Split-Phase Type 1 Whole-Home Surge Protector (3-Wire, NEMA 4X)
Protect your 120/240V split-phase electrical system from transient overvoltage events caused by lightning, utility switching, and large motor loads. The Bad Wolf SP240V50KA is a 3-wire Type 1 surge protective device (SPD) designed for service equipment and panel protection, operating at 240 VAC line-to-line and 120 VAC line-to-ground.
Built for demanding environments, the SP240V50KA features a rugged NEMA 4X / IP67 enclosure for indoor or outdoor installation and fast surge diversion to help reduce the risk of damage to appliances, HVAC equipment, and sensitive electronics. A sealed, tamper-resistant design supports long-term reliability, and a simple status indicator confirms protection at a glance (Green = Protected, Off = Replace).
Key Features & Benefits
⚡ High surge capability — 50 kA per phase with 100 kA SCCR (RMS symmetrical) for robust protection in high fault-current environments.
🎯 Low let-through protection — VPR 1000V L-L / 500V L-G to help protect sensitive electronics and controls.
🔌 Split-phase optimized (3-wire) — Protection modes: L1–L2, L1–G, L2–G for comprehensive coverage on 120/240V service.
🧰 Pre-wired for flexible installs — Includes 36 inches of 12 AWG leads for mounting and routing convenience.
🌧 Indoor/outdoor rated — NEMA 4X / IP67, V-0 flammability housing for durable performance in harsh locations.
✅ Simple status indication — Green = Protected; Off = Replace for quick visual confirmation.
🇺🇸 Made in the USA — Built by a Service-Disabled Veteran-Owned manufacturer.
Installation notes
Mount as close to the service equipment/panel as practical and keep leads short and straight for best performance.
Install per NEC and local electrical code. A licensed electrician is recommended.
For outdoor installs, mount to maintain sealing and use appropriate cable management (drip loop, strain relief).
LED status
Green ON: Protected / normal operation
OFF: Replace unit (protection has reached end-of-life)
Product Details
| Weight | 8 oz |
|---|---|
| Dimensions | 2.5 × 2.4 × 2 in |
| Application | Commercial, EV Charging Station, Farm, Generator, Home, HVAC, Irrigation, Marine, RV, Solar, Wind |
| Connection Type | Hardwire |
| Environmental Rating | Indoor, Outdoor |
| Service Type | Split Phase |
| SPD Classification | Type 1, Type 2 |
| Surge Current Rating (A) | 50kA |
| Type of Electrical Current | AC |
| Voltage (Vac) | 240 |
| Surge Type Category Rating | Lightning |
Specifications
Review the product details and product description for voltage, surge current rating, connection type, enclosure rating, wiring details, certifications, and other technical information.
For detailed product-specific ratings, refer to the specifications listed on this product page and any available product documentation.
Installation
Installation should be performed by a qualified electrician, licensed contractor, or qualified installer in accordance with the product instructions, applicable electrical codes, and local requirements.
Always disconnect power before installation and verify the product is suitable for the electrical system where it will be installed.
Warranty
Bad Wolf surge protection devices include a 5-year product warranty.
Eligible products may also include connected equipment warranty coverage when properly installed and registered according to the warranty terms.
Please review the full warranty terms for complete details, limitations, registration requirements, and coverage information.
Accessories
Recommended accessories and related products for this item.
FAQ
What is the SP240V50KA mainly used for?
The SP240V50KA is commonly used to help protect HVAC condenser units, heat pump outdoor units, mini-split outdoor units, pool pumps, well pumps, irrigation pumps, septic pumps, and similar dedicated equipment circuits from damaging power surges.
Can the SP240V50KA be installed on an HVAC condenser?
Yes. The SP240V50KA is a good option for surge protection at an HVAC condenser or heat pump outdoor unit when installed on a compatible electrical circuit by a qualified installer.
Can this surge protector be used on a pool pump?
Yes. The SP240V50KA may be used to help protect compatible pool pump circuits when the electrical system matches the product ratings and installation requirements.
Can this be used on a well pump or irrigation pump?
Yes. The SP240V50KA may be used on compatible well pump, irrigation pump, and similar pump circuits where the voltage and wiring configuration match the product specifications.
What type of wiring is this surge protector designed for?
The SP240V50KA is commonly used on compatible split-phase equipment circuits with two hot conductors and a ground. Always verify the electrical system and product ratings before installation.
Can the SP240V50KA be used as a whole-house surge protector?
Yes, the SP240V50KA can be used for whole-house surge protection on a compatible 120/240V split-phase electrical system. However, for main panel or whole-house protection, Bad Wolf’s higher-capacity models are usually the better choice.
Which Bad Wolf products are better for whole-house protection?
For main electrical panel or whole-house surge protection, customers may want to consider higher-capacity Bad Wolf models such as the SP240V65KA, SP240V100KA, SP240V200KA, or SP240V400KA, depending on the application and desired protection level.
What does the 50KA rating mean?
The 50KA rating refers to the surge current capacity of the device. It is designed to help protect connected electrical equipment from damaging surge events when properly installed on a compatible system.
Is this a Type 1 surge protective device?
Yes. The SP240V50KA is a Type 1 surge protective device, which allows it to be installed on the line side or load side of the service disconnect when installed in accordance with the product instructions and applicable electrical codes.
What does the status light mean?
The status light provides a visual indication of protection status. Green means the surge protector is functioning. If the light is off, the device should be replaced.
Can this surge protector be installed outdoors?
Yes. The SP240V50KA uses a durable enclosure suitable for indoor or outdoor installation when installed according to the product instructions and applicable electrical codes.
Who should install this product?
This product should be installed by a qualified electrician, licensed contractor, HVAC contractor, pool contractor, pump contractor, or qualified installer familiar with the equipment and electrical circuit being protected.
Does this product include a warranty?
Bad Wolf surge protection devices include a 5-year product warranty. Eligible products may also include connected equipment warranty coverage when properly installed and registered according to the warranty terms.
Does this surge protector need to be installed with a circuit breaker?
This surge protector is a Type 1 surge protective device and does not have to be installed in conjunction with a circuit breaker when installed as a Type 1 SPD in accordance with the product instructions and applicable electrical codes.
If this surge protector is installed as a Type 2 SPD on the load side of the service disconnect, Bad Wolf recommends using a 20 amp double-pole circuit breaker unless otherwise required by the authority having jurisdiction, local code, or the specific installation conditions.