Finger-Safe Fuse Holders
Tool-assisted fuse access lets technicians carry out live maintenance without exposing hands to energised components, cutting both risk and downtime during string-level fault-finding.
T-SCB-300 Series
String Combiner Box (SCB)
String Combiner Box (T-SCB-300) | Solar PV DC String Combiner & Monitoring Solution
A String Combiner Box (SCB) (T-SCB-300) is the point in a solar plant where multiple PV strings meet before their combined DC output travels on to the inverter, so getting it right affects everything downstream: safety, uptime, and how quickly a fault gets found. The Sertel T-SCB-300 is a fully customisable String Combiner Box (SCB) built to combine anywhere from 1 to 36 input strings at 600 V, 1000 V, or 1500 V DC, with input fuses, surge protection, and DC disconnect switches built in as standard. An intelligent monitoring variant adds per-string visibility into current, voltage, SPD status, switch status, and enclosure temperature, so plant owners can spot an underperforming string long before it shows up as a dip in generation reports.
1-36 configurable DC string inputs
600 V / 1000 V / 1500 V DC rated
Up to 500 A DC switch rating
IP66, CE & TUV certified enclosure
Key Features
Engineered for Mission-Critical Solar Performance
Everything a string-level junction needs to protect an array, simplify commissioning, and keep a plant producing at its rated output, built into a single enclosure.
Full Safety Shielding
An internal shield covers all live components, so inspection and routine maintenance can happen without accidental contact, a detail that matters as much for insurance audits as it does for field safety.
High-Capacity Disconnect
Disconnect rating up to 600 A at 1500 V DC, 100% load-break rated, so the full operating current can be interrupted safely in a single action during shutdown or emergency isolation.
90°C-Rated Copper Bus Bars
Plated copper bus bars rated for continuous 90°C operation, meeting the thermal conductor requirements of EN 61439-2:2011 and holding up under sustained high string currents.
Type I + II Surge Protection
Combined Type I and Type II SPD protection absorbs both direct lightning-induced surges and switching transients, protecting inverters and downstream electronics from voltage spikes.
Per-String Monitoring
The intelligent variant reports individual string current, voltage, SPD status, switch status, and internal temperature in real time, turning a routine O&M walk-down into a dashboard check.
- Configurable string inputs
- 1-36
- Max DC switch rating
- 500 A
- Enclosure protection rating
- IP66
Applications
Trusted Across Solar Installations of Every Scale
From a single MW rooftop array to a multi-hundred-MW utility plant, the T-SCB-300's configurable input count and voltage range enable a single product line to span the entire spectrum of PV project sizes.
Utility-Scale Solar Farms
Commercial & Industrial Rooftops
Ground-Mount PV Plants
Solar Carports & Canopies
Floating Solar (Floatovoltaics)
Agrivoltaic Projects
EPC & System Integrators
O&M & Asset Management Firms
Technical Specifications
Complete enclosure, electrical, input, and output details for the T-SCB-300 String Combiner Box.
Enclosure & Mounting
| Parameter | Specification |
|---|---|
| Material | GRP / FRP / Polycarbonate (PC) |
| Degree of Protection | IP 66 |
| UV Resistance | Yes, UV-stabilised enclosure material |
| Locking Arrangement | Latch mechanism with locking provision |
| Mounting Type | Wall mount / Structure mount |
FAQ
Frequently Asked Questions
Ready to Protect Your Solar Array?
Talk to a Sertel engineer for a tailored String Combiner Box configuration, datasheet, and pricing for the T-SCB-300.