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MERSEN Surge Protection Device: Single Phase, 120/240V AC, 2 Poles, 3 Wires, L-L/L-N - DIN Rail Internal-Mount SPDs
MERSENDIN Rail Internal-Mount SPDs

MERSEN Surge Protection Device: Single Phase, 120/240V AC, 2 Poles, 3 Wires, L-L/L-N

The MERSEN STP240S07 is a single-phase, DIN-rail mount surge protection device (SPD) with a 120/240V AC rating, 3 wires, and L-N protection modes. It features a 200kA short circuit current rating, a 600V (L-N)…

SKU 3G-OTH-23032

Brand
MERSEN
Item
Surge Protection Device: Single Phase, 120/240V AC, 2 Poles, 3 Wires, L-L/L-N
Category
DIN Rail Internal-Mount SPDs
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Technical Specifications

MERSEN
Manufacturer Part Number
STP240S07
Type
L-L/L-N
AC
120/240V
Poles
2
Wires
3
Voltage
120/240V AC
Filtering
No
Mounting Style
DIN-Rail
Number of Wires
3 Wires
Enclosure Material
Polyethylene Terephthalate
Modes of Protection
L-N
Voltage Protection Rating
600V (L-N)
Short Circuit Current Rating
200kA
Max. Continuing Operating Voltage
175/350 V AC
View Full Spec Sheet

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

Product Description

The MERSEN STP240S07 is a single-phase, DIN-rail mount surge protection device (SPD) with a 120/240V AC rating, 3 wires, and L-N protection modes. It features a 200kA short circuit current rating, a 600V (L-N) voltage protection rating, and a max. continuing operating voltage of 175/350 V AC. The enclosure is made of polyethylene terephthalate, and the unit has no filtering.

Frequently Asked Questions

What is the MERSEN STP240S07 surge protection device used for?

The MERSEN STP240S07 is a single-phase DIN-rail mount SPD that protects electrical equipment from transient overvoltages. It is used in industrial control panels, HVAC systems, and machinery where 120/240V AC, 3-wire L-N protection is required, with a 200kA short circuit current rating.

What are the specifications of the MERSEN STP240S07?

The MERSEN STP240S07 is rated 120/240V AC, 2 poles, 3 wires, with L-N protection modes. It has a max. continuing operating voltage of 175/350 V AC, a voltage protection rating of 600V (L-N), and a short circuit current rating of 200kA. The enclosure is polyethylene terephthalate, with no filtering.

Where to buy the MERSEN STP240S07 worldwide?

3G Electric supplies the MERSEN STP240S07 worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this DIN-rail mount SPD.

How to install the MERSEN STP240S07?

Install the MERSEN STP240S07 on a standard DIN rail inside an electrical panel. Ensure the supply is disconnected, then connect the L and N conductors per the wiring diagram. The unit is for L-N protection only; verify the 120/240V AC system voltage and 200kA SCCR compatibility before energizing.

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.

MERSEN Products

3G Electric supplies MERSEN din rail internal-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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MERSEN Surge Protection Device: Three Phase, 120/208V AC Wye, 3 Poles, 4 Wires, L-L/L-N, 200kA (MPN STP208Y07). Key specifications — Voltage: 120/208V AC Wye; Number of Wires: 4 Wires; Modes of Protection: L-N; Max. Continuing Operating Voltage: 175/350 V AC; Voltage Protection Rating: 1200V (L-L); Short Circuit Current Rating: 200kA; Filtering: No; Enclosure Material: Polyethylene Terephthalate.
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MERSEN Surge Protection Device: Three Phase, 347/600V AC Wye, 3 Poles, 4 Wires, L-L/L-N, 200kA (MPN STP600Y07). Key specifications — Voltage: 347/600V AC Wye; Number of Wires: 4 Wires; Modes of Protection: L-N; Max. Continuing Operating Voltage: 420/840 V AC; Voltage Protection Rating: 2500V (L-L); Short Circuit Current Rating: 200kA; Filtering: No; Enclosure Material: Polyethylene Terephthalate.
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MERSEN Surge Protection Device: Three Phase, 240V AC Delta, 3 Poles, 4 Wires, L-G/L-L, 275/550 V AC (MPN STP240D07). Key specifications — Voltage: 240V AC Delta; Number of Wires: 4 Wires; Modes of Protection: L-L; Max. Continuing Operating Voltage: 275/550 V AC; Voltage Protection Rating: 900V (L-G); Short Circuit Current Rating: 200kA; Filtering: No; Enclosure Material: Polyethylene Terephthalate.
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MERSEN Surge Protection Device: Three Phase, 240V AC Delta, 3 Poles, 4 Wires, L-G/L-L, 275/550 V AC (MPN STP240D07). Key specifications — Voltage: 240V AC Delta; Number of Wires: 4 Wires; Modes of Protection: L-L; Max. Continuing Operating Voltage: 275/550 V AC; Voltage Protection Rating: 900V (L-G); Short Circuit Current Rating: 200kA; Filtering: No; Enclosure Material: Polyethylene Terephthalate.
MERSEN Surge Protection Device: Single Phase, 277V AC, 1 Poles, 2 Wires, L-N, 320 V AC, 600V (L-N) (MPN STP277P07M). Key specifications — Voltage: 277V AC; Number of Wires: 2 Wires; Modes of Protection: L-N; Max. Continuing Operating Voltage: 320 V AC; Voltage Protection Rating: 600V (L-N); Short Circuit Current Rating: 200kA; Filtering: No; Includes: Form C Dry Contact.
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