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MERSEN Surge Protection Device: Three Phase, 120/208V AC Wye, 3 Poles, 4 Wires - DIN Rail Internal-Mount SPDs
MERSENDIN Rail Internal-Mount SPDs

MERSEN Surge Protection Device: Three Phase, 120/208V AC Wye, 3 Poles, 4 Wires

The MERSEN STP208Y07 is a three-phase, DIN-rail internal-mount surge protection device (SPD) for 120/208V AC Wye systems with 4 wires and 3 poles. It provides L-N mode protection, has a voltage protection rating of…

SKU 3G-OTH-22543

Brand
MERSEN
Item
Surge Protection Device: Three Phase, 120/208V AC Wye, 3 Poles, 4 Wires
Category
DIN Rail Internal-Mount SPDs
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Technical Specifications

MERSEN
Manufacturer Part Number
STP208Y07
Type
L-L/L-N, 200kA
Poles
3
Wires
4
AC Wye
120/208V
Voltage
120/208V AC Wye
Filtering
No
Mounting Style
DIN-Rail
Number of Wires
4 Wires
Enclosure Material
Polyethylene Terephthalate
Modes of Protection
L-N
Voltage Protection Rating
1200V (L-L)
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 STP208Y07 is a three-phase, DIN-rail internal-mount surge protection device (SPD) for 120/208V AC Wye systems with 4 wires and 3 poles. It provides L-N mode protection, has a voltage protection rating of 1200V (L-L), a short circuit current rating of 200kA, and a max. continuing operating voltage of 175/350 V AC. The enclosure is made of polyethylene terephthalate, and the unit does not include filtering.

Frequently Asked Questions

What is the MERSEN STP208Y07 surge protection device used for?

The MERSEN STP208Y07 is a three-phase DIN-rail internal-mount SPD designed to protect electrical equipment in 120/208V AC Wye systems from transient overvoltages. It is commonly used in commercial and industrial panelboards, switchgear, and control cabinets to safeguard sensitive electronics against lightning strikes and switching surges.

What are the specifications of the MERSEN STP208Y07?

The MERSEN STP208Y07 is a 3-pole, 4-wire SPD for 120/208V AC Wye systems. It offers L-N mode protection with a voltage protection rating of 1200V (L-L), a short circuit current rating of 200kA, and a max. continuing operating voltage of 175/350 V AC. The enclosure is polyethylene terephthalate, and it does not include filtering.

Where to buy the MERSEN STP208Y07 worldwide?

3G Electric supplies the MERSEN STP208Y07 surge protection device to customers worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact 3G Electric for pricing and lead time on this DIN-rail SPD.

How to install the MERSEN STP208Y07 on a DIN rail?

To install the MERSEN STP208Y07, mount the SPD onto a standard DIN rail inside your panelboard. Ensure the system is de-energized, then connect the L1, L2, L3, and neutral wires per the wiring diagram for a 120/208V AC Wye configuration. Follow local electrical codes and the manufacturer's instructions for proper placement and torque settings.

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, 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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