Overview
The Ditek DEU-120/240MS is a multi-purpose surge protective device engineered for 120/240VAC split-phase electrical systems. This hardwired SPD delivers cost-effective surge suppression suitable for residential, commercial, and light industrial applications. The unit features a durable NEMA 4X polycarbonate enclosure and diagnostic LED indicators to monitor power, ground presence, and SPD function.
Key Features
- Multi-Purpose Protection: Ideal for HVAC condensers, well and pool pumps, motors, and incoming utility power
- High Surge Rating: 50,000-amp total surge current capacity with fast response time
- Compact Design: Small footprint (3.5″ L × 1.89″ W × 3.4″ H) allows installation in tight spaces
- Diagnostic Indicators: Dual-LED display shows power status, ground presence, and device function
- Weatherproof Enclosure: NEMA 4X polycarbonate construction rated for outdoor and wet environments
- Standards Compliance: UL1449 listed, Type 1/2 SPD; meets ANSI/IEEE C62.41 and C62.45 Category B standards
Technical Specifications
- Input Voltage: 120/240VAC, split-phase (3W + G)
- Operating Frequency: 50/60 Hz
- Peak Surge Current Rating: 50,000 Amp (total)
- Nominal Discharge Current (In): 10 kA
- MCOV (Maximum Continuous Operating Voltage): 130/260V
- SPD Type: Type 1/2 Surge Protective Device
- Protection Modes: L-G, L-N, N-G
- Response Time: <1 nanosecond
- Enclosure Rating: NEMA 4X polycarbonate
- Connection Method: 3/4″ NPT male threaded fitting with 18-inch 12 AWG leads
- Operating Temperature Range: −31°F to +176°F (−35°C to +80°C)
- Maximum Humidity: 95% non-condensing
- Dimensions: 3.5″ L × 1.89″ W × 3.4″ H
- Weight: 0.55 lbs
- Certifications: UL1449, ANSI/IEEE C62.41, ANSI/IEEE C62.45
Typical Applications
The Ditek DEU-120/240MS is widely deployed in HVAC systems to protect air conditioning condensers and heat pump units from electrical transients. It is equally suited for protecting submersible well pumps, pool equipment, motors, and as a point-of-use surge arrestor for incoming utility service. The compact design and weatherproof enclosure make it suitable for both indoor and outdoor electrical installations, including disconnect boxes and service panels.
Compatibility & Replacements
Compatible With
- 120/240VAC split-phase electrical systems
- HVAC air conditioning and heat pump equipment
- Submersible pumps (well, pool, sump)
- Three-phase motor starters and VFDs on single-phase feeders
- Incoming utility power feeds and service disconnects
- Outdoor lighting circuits and landscape equipment
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The Ditek DEU model designation does not appear in current manufacturer literature; equivalent models from Ditek’s current product line include the DTK-120/240CM+ and DTK-120/240CMX. Consult Ditek’s product selector or contact a distributor to confirm interchangeability with your legacy installation.
Works With
- UL1449 Type 1/2 SPD systems and panels
- Parallel-wired surge protective device installations
- NFPA and NEC-compliant electrical panels
- Standard 3/4″ NPT conduit fittings and electrical terminations
