Multi-String DC Isolator Box China Manufacturer and Supplier
TYPLE DC isolator boxes, also known as DC disconnect boxes, house multiple DC isolator switches in a single weatherproof enclosure, allowing individual solar PV circuits to be disconnected independently. Available configurations include different circuit counts, voltage and current ratings, and enclosure options to meet the project requirements of EPC contractors and distributors.
Features of DC Isolator Boxes
- Independent Isolation: Disconnect individual PV circuits for maintenance.
- DC Ratings: 1000V DC and 32A per circuit.
- Flexible Configurations: Options for 1–9 PV circuits.
- Weatherproof Housing: PC+ABS enclosure with IP65 or IP68 options.
- Impact Resistance: IK10-rated enclosure.
- Connection Options: MC4 connectors or cable gland entries.
- Wall Mounting: Convenient installation near PV equipment.
TYPLE DC Isolator Box Series
A DC disconnect box is a weatherproof enclosure that houses one or more DC isolator switches (disconnectors), providing safe manual disconnection points for a solar PV DC system in a single ready-to-mount unit. Each isolator inside is built to align with IEC/EN 60947-3 and lets an installer de-energise a circuit for maintenance, fault-finding, or emergency shutdown. A multi-string DC disconnect box groups several of these switches together, so multiple strings or feeders can be isolated independently from one enclosure. Unlike a combiner box, a DC disconnect box does not combine strings or provide fuse and surge protection — its single job is safe isolation. Unlike a single DC isolator switch, it provides several disconnect points in one weatherproof housing.
For how isolation differs from breaking a fault, see the difference between a DC MCB and a DC isolator.
Why Choose TYPLE As Your DC Isolator Box Supplier
Founded in 2015, TYPLE is your trusted manufacturer and supplier of DC isolator boxes in Wenzhou, China. We support OEM and ODM orders, with circuit configurations, electrical ratings, and enclosure options tailored to your project requirements.
Send us your required specifications or project details. Our engineering team will provide a tailored quotation and confirm the lead time within 24 hours.
Why Choose TYPLE As Your DC Isolator Box Supplier
Founded in 2015, TYPLE is your trusted manufacturer and supplier of DC isolator boxes in Wenzhou, China. We support OEM and ODM orders, with circuit configurations, electrical ratings, and enclosure options tailored to your project requirements.
Send us your required specifications or project details. Our engineering team will provide a tailored quotation and confirm the lead time within 24 hours.
Applications of DC Isolator Boxes
- Commercial & industrial PV — provides multiple independent disconnect points for strings or sub-arrays in one enclosure, simplifying maintenance isolation on larger rooftop and ground-mount systems.
- Array sectionalizing — lets sections of a PV array be de-energised individually without shutting down the whole system.
- Off-grid & energy storage (ESS) — groups DC disconnects for array and feeder circuits in a single weatherproof box for outdoor, harsh-climate sites.
TYPLE DC Isolator Box Configurations
Multi-String DC Disconnect Box (1–9 String)
- Built-in DC isolator switch(es);1 to 9 strings configurable
- System DC 1000V · 32A per string · built-in isolator to IEC/EN 60947-3 (Ui DC 1200V, Icu 6kA)
- IP65 or IP68 waterproof enclosure · IK10 impact · PC+ABS housing
- MC4 or PG connectors · wall mounting · –25°C to +60°C · 298 × 258 × 122 mm
How to Choose the Right DC Isolator Box
| Parameter | Why It Matters | TYPLE Coverage |
|---|---|---|
| Number of ways | Sets how many strings can be isolated independently | 1–9 strings (configurable) |
| Rated voltage (Ue) | Must match the system’s maximum DC voltage | DC 1000V (built-in isolator Ui DC 1200V) |
| Rated current (In) | Sized to each string’s current | 32A per string |
| Poles per isolator | Number of DC conductors switched per circuit | 4P |
| Enclosure rating | Outdoor sites need ingress + impact protection | IP65 or IP68 · IK10 · PC+ABS |
| Connector | Must match array cabling | MC4 or PG |
| Reference standard | Confirms the isolation design basis | Built-in isolator to IEC/EN 60947-3 |
Frequent Asked Questions
A DC disconnect box is a weatherproof enclosure that houses one or more DC isolator switches, giving a solar system safe manual disconnection points in a single ready-to-mount unit. Each isolator is built to IEC/EN 60947-3.
A combiner box combines multiple strings and adds fuse and surge protection, while a DC disconnect box only provides isolation — it does not combine strings or protect against overcurrent. The two are often used together in a PV system.
A single DC isolator switch disconnects one circuit, while a DC disconnect box houses several isolators in one enclosure so multiple circuits can be isolated independently. The box is the multi-way, weatherproof form.
No. It only disconnects circuits manually. Overcurrent protection is provided separately by DC fuses or DC circuit breakers.
TYPLE DC disconnect boxes use isolators engineered to align with IEC/EN 60947-3, and are built with components from certified supply-chain partners.
