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IMO SI16 PEL64R 4 Enclosed DC Switch IP67 Nema 4X 4 Pole 2 String 16A 900VDC Lockable Rotary Handle
£75.76
Why Choose the IMO SI16-PEL64R-4 DC Isolator?
The IMO SI16-PEL64R-4 is a purpose-built 16 A four-pole DC isolator switch specifically engineered for photovoltaic (PV) installations. Unlike AC switches adapted for DC applications, the SI16 Series is designed as a true DC isolator, providing safe and reliable disconnection between solar panel arrays and DC/AC inverters. It supports two-string PV systems and delivers dependable arc suppression for enhanced operational safety.
Supplied in a robust IP67-rated thermoplastic enclosure, the SI16-PEL64R-4 offers excellent protection against dust, water and harsh outdoor conditions. The lockable rotary handle incorporates IMO's Safelock function, allowing the switch to be secured in the OFF position during maintenance to prevent accidental reconnection.
Featuring a high-speed trigger mechanism, knife-edge contacts and integrated arc cooling chambers, the SI16-PEL64R-4 rapidly extinguishes DC arcs, making it ideal for residential, commercial and industrial solar PV systems requiring safe DC isolation.
Key Advantages
- Purpose-designed true DC isolator for photovoltaic systems.
- 16 A rated current with four-pole switching.
- Supports two PV strings.
- IP67 weatherproof enclosure for indoor and outdoor installation.
- Patented Safelock lockable OFF handle.
- High-speed switching with integrated arc suppression.
Key Features
- Model: SI16-PEL64R-4
- Rated current: 16 A
- Maximum DC voltage: 600 V DC
- Four-pole configuration (2 strings).
- 1000 V DC insulation voltage (up to 1500 V insulation depending on installation category).
- Operator-independent snap-action switching.
- Knife-edge contacts with arc cooling chambers.
- Lockable OFF rotary handle.
- Flame-retardant thermoplastic enclosure.
- Suitable for photovoltaic DC isolation.
Designed Specifically for Solar PV Systems
Unlike conventional AC switches, the IMO SI16-PEL64R-4 has been engineered specifically for switching direct current generated by photovoltaic arrays. Its spring-assisted operating mechanism rapidly opens the contacts while integrated arc cooling chambers extinguish the DC arc within milliseconds, helping maximise both safety and switch longevity.
The compact enclosure, weatherproof construction and lockable operating handle make the isolator suitable for rooftop solar installations, commercial PV systems, battery storage applications and inverter isolation points requiring reliable long-term performance.
Typical Applications
- Residential solar PV systems.
- Commercial photovoltaic installations.
- Solar inverter isolation.
- Battery energy storage systems.
- Renewable energy projects.
- Two-string photovoltaic arrays.
- DC power distribution systems.
Technical Specifications
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| Mounting Type | Enclosed / surface | |
|---|---|---|
| Material | Plastic | |
| Product Series | IMO SI | |
| Supply Type | DC | |
| Device Type | Enclosed safety switch / isolator | |
| Current | 16 A | |
| Voltage | 900 V | |
| Phase | Three Phase | |
| IP Rating | IP67 | |
| Poles | 4-pole | |
| Manufacturer | IMO Precision Controls | |
| Series | SI16 Solar DC Isolators | |
| Model | SI16-PEL64R-4 | |
| Product type | Enclosed DC isolator switch | |
| Rated operational current | 16 A | |
| Maximum operating voltage | 600 V DC | |
| Rated insulation voltage | 1000 V DC (up to 1500 V depending on installation category) | |
| Number of poles | 4 | |
| Number of PV strings | 2 | |
| Protection rating | IP67 / NEMA 4X | |
| Mounting | Surface mounting | |
| Enclosure material | Flame-retardant thermoplastic | |
| Maximum cable size | 10 mm² | |
| Operating temperature | -40°C to +45°C | |
| Storage temperature | -50°C to +90°C | |
| Dimensions | 180 × 98 × 107 mm | |
| Standards | IEC 60947-3, UL508, UL98B | |
| HS Code | 8536508000 | |
| Country of Manufacture | Austria |
Frequently Asked Questions
What is the IMO SI16-PEL64R-4 used for?
The SI16-PEL64R-4 is used to safely isolate DC circuits between photovoltaic solar panels and inverters during maintenance or emergency shutdowns.
Is this a true DC isolator?
Yes. The SI16 Series has been specifically designed for DC switching and is not an AC switch adapted for DC use.
How many PV strings does it support?
This model is configured for two photovoltaic strings using a four-pole switching arrangement.
Can it be installed outdoors?
Yes. Its IP67-rated enclosure provides excellent protection against dust and water, making it suitable for external installation when correctly fitted.
Can the switch be locked?
Yes. The integrated Safelock rotary handle can be padlocked in the OFF position during servicing and maintenance.
Trusted by Solar Installation Professionals
IMO DC isolators are trusted by solar installers, renewable energy contractors and electrical engineers for their purpose-built DC switching technology, rapid arc suppression and dependable long-term performance in photovoltaic installations.
