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MERSEN STLC240S025 Residential Whole House External-Mount SPD, 240/120 V, 25 kA - Residential Whole House External-Mount SPDs
MERSENResidential Whole House External-Mount SPDs

MERSEN STLC240S025 Residential Whole House External-Mount SPD, 240/120 V, 25 kA

The MERSEN STLC240S025 is a residential whole-house external-mount surge protection device (SPD) for 120/240VAC split systems. It is rated for 240/120 V, with a maximum continuous operating voltage of 600V (L-N) and…

SKU 3G-OTH-129774

Brand
MERSEN
Item
STLC240S025 Residential Whole House External-Mount SPD, 240/120 V, 25 kA
Part Number
STLC240S025
Category
Residential Whole House External-Mount SPDs
Available to Order
Also known as:STLC240S025MERSEN
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Technical Specifications

MERSEN
Manufacturer Part Number
STLC240S025
Type
1000V (L-L)/600V (L-N), 240/120 V, 25 kA

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MERSEN Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The MERSEN STLC240S025 is a residential whole-house external-mount surge protection device (SPD) for 120/240VAC split systems. It is rated for 240/120 V, with a maximum continuous operating voltage of 600V (L-N) and a surge current capacity of 25 kA. The unit includes an LED status indicator for operational monitoring.

Frequently Asked Questions

What is the MERSEN STLC240S025 surge protection device used for?

The MERSEN STLC240S025 is a residential whole-house external-mount SPD designed to protect 120/240VAC split electrical systems from transient overvoltages. It is commonly installed at the service entrance to safeguard home wiring, appliances, and electronics against lightning strikes and utility switching surges.

What are the specifications of the MERSEN STLC240S025?

The MERSEN STLC240S025 is rated for 240/120 V with a maximum continuous operating voltage of 600V (L-N). It has a surge current capacity of 25 kA and includes an LED status indicator for operational monitoring. The unit is designed for 120/240VAC split systems and is manufactured by MERSEN.

Where to buy the MERSEN STLC240S025 worldwide?

You can source the MERSEN STLC240S025 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact our team for a quote and lead time; we supply this SPD to residential and commercial projects globally.

How to install the MERSEN STLC240S025 surge protector?

Install the MERSEN STLC240S025 externally at the main service panel, following local electrical codes. Mount the unit securely, connect line and neutral conductors to the appropriate terminals, and verify the LED indicator illuminates. Always de-energize the system before installation and consult a licensed electrician for compliance.

Used in

Common applications for MERSEN
Power electronics protection — MERSEN A70Q series semiconductor fuses in variable frequency drives for motor control.
Surge protection for industrial panels — MERSEN STP480D07 SPDs in three-phase 480V AC distribution boards.
Control circuit overcurrent protection — MERSEN ATM series midget fuses in PLC and instrumentation cabinets.
Power distribution in manufacturing — MERSEN FSPDB4A finger-safe blocks in motor control centers for wire management.
DC bus protection in renewable energy — MERSEN A30QS series fuses in solar inverter DC inputs.
High-voltage semiconductor protection — MERSEN A70Q series fuses in welding equipment power supplies.
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MERSEN Products

3G Electric supplies MERSEN residential whole house external-mount spds. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
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Single-phase external-mount surge protective device (SPD) with chase-nipple design for 240/120VAC split systems. Rated for 50 kA maximum surge current per mode and 1000 V (L-L) voltage protection rating. Includes LED status indicator and non-metallic enclosure. Suitable for protecting electrical equipment in commercial and industrial facilities from transient overvoltages
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Single-phase surge protection device for 240/120VAC split-phase systems. Provides 50 kA surge current per mode with 1000V (L-G) voltage protection rating. Housed in a non-metallic enclosure with LED status indicator. Suitable for external mounting on panel boards and load centers
MERSEN
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Single-phase surge protection device for 240/120VAC split systems. Features a non-metallic NEMA 4X enclosure, LED status indicator, voltage protection rating of 1000V (L-G), and maximum surge current per mode of 50 kA. Chase-nipple external-mount design for panel installation where space is limited
MERSEN
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Single-phase surge protective device for external mounting via chase nipple. Rated 240/120 VAC split, 100 kA maximum surge current per mode, with a voltage protection rating of 700 V (L-G). Enclosure is non-metallic, Type 4X, and includes an LED status indicator. Suitable for protecting equipment in industrial control panels, HVAC, and pump control applications
MERSEN
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Single-phase DIN Rail internal-mount surge protective device for 240/480VAC split systems. Provides L-N protection with a voltage protection rating of 600V (L-N), short-circuit current rating of 200 kA, and maximum continuous operating voltage of 240/480 V. Includes a microswitch for remote monitoring. Suitable for use in industrial control panels and power distribution equipment

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