Surge-Trap® SPD Type 1 STT4X Series
The Surge-Trap® SPD Type 1 STT4X Series is part of the Mersen (formerly Ferraz Shawmut) surge protection line, distributed by Gross Automation.

The Surge-Trap® Type 1 STT4X Series meets requirements for UL1449 Third Edition. It provides a two-year warranty and offers an economical replacement for the former surge arrestor category. The STT4X features TPMOV® technology inside making it a no-fuse surge suppressor that doesn't require the use of additional overcurrent protection. It can be installed upstream or downstream of the main disconnect.
Specifications
| Specification | Value |
|---|---|
| Ratings | AC:; Surge : 50kA per phase; Volts : 120V to 600V; SCCR : 200kA; Nominal discharge current : 20kA; Operating & storage temp : -25C to +60C; Enclosure : STT2: NEMA 2 : STT4X: NEMA 4X; Wiring size : 16 #12 AWG integral leads; UL 1449 Third Edition File E210793; Type 1 listed for United States; Type 2 listed for Canada; RoHS Compliant; ANSI/IEEE C62 41; UL 96A lighting protection (master label most models); CE; AC Distribution; Power supplies; Industrial; Commerial; Residential; Telecommunications; IT / Data centers |
| Features | Compact design; Panel mount; No additional overcurrent protection devices required; 200kA short ciruit current rating (SCCR); UL 1449 Third Edition Type 1 listed; NEMA 4X for outdoor applications; Status LEDs; Two-year warranty |
Features
- Compact design
- Panel mount
- No additional overcurrent protection devices required
- 200kA short ciruit current rating (SCCR)
- UL 1449 Third Edition Type 1 listed
- NEMA 4X for outdoor applications
- Status LEDs
- Two-year warranty
Ratings
- AC:
- Surge : 50kA per phase
- Volts : 120V to 600V
- SCCR : 200kA
- Nominal discharge current : 20kA
- Operating & storage temp : -25C to +60C
- Enclosure : STT2: NEMA 2 : STT4X: NEMA 4X
- Wiring size : 16 #12 AWG integral leads
- UL 1449 Third Edition File E210793
- Type 1 listed for United States
- Type 2 listed for Canada
- RoHS Compliant
- ANSI/IEEE C62 41
- UL 96A lighting protection (master label most models)
- CE
- AC Distribution
- Power supplies
- Industrial
- Commerial
- Residential
- Telecommunications
- IT / Data centers
Catalog Numbers
| Catalog No. NEMA 4X Enclosure | Nominal System Voltage (VAC) | System Type | Freq (Hz) | MCOV (L-N) | Nominal Discharge Current (In, kA) | VPR L-N | VPR L-G | VPR N-G | VPR L-L | Circuit Connection Wiring Diagram |
|---|---|---|---|---|---|---|---|---|---|---|
| STT4X1201PG+ | 120 | 1 | 50/60 | 180 | 20 | 700 | 1200 | 600 | - | A |
| STT4X240SPG+ | 120/240 | 1S | 50/60 | 180 | 20 | 700 | - | - | 1200 | B |
| STT4X2401PG+ | 240 | 1 | 50/60 | 270 | 20 | 1000 | 1500 | 700 | - | A |
| STT4X2083PYG+ | 120/208 | 3Y | 50/60 | 180 | 20 | 700 | - | - | 1200 | D |
| STT4X4803PYG+ | 277/480 | 3Y | 50/60 | 320 | 10 | 1200 | - | - | 2000 | D |
| STT4X6003PYG+ | 347/600 | 3Y | 50/60 | 420 | 10 | 1500 | - | - | 2500 | D |
| STT4X2403PDG+ | 240 | 3D | 50/60 | 270 (L-G) | 20 | - | 1000 | - | 1800 | C |
| STT4X4803PDG+ | 480 | 3D | 50/60 | 550 (L-G) | 10 | - | 1800 | - | 3000 | C |