PRODUCTS
The ThyroLink Range
Zero-crossing thyristor switching modules for APFC panels, in four ratings. All specs below confirmed directly by Arun, our engineering lead. The enclosure is identical across the range; only the printed nameplate sheet differs per order.
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Same enclosure across all 4 ratings. Nameplate differs per order.
THYRISTOR SWITCHING MODULE · 10 kVAR
ThyroLink-10: 10 kVAR Thyristor Switching Module
Compact APFC panels, SME installations, and applications needing fine-step correction. Mechanical contactors in this range fail early because they switch most frequently, correcting small load swings all day.
| Rating | 10 kVAR |
| Voltage | 415V |
| Current | 20A |
| Dimensions (L x B x H) | 200mm x 182mm x 125mm |
| Switching time | Under 9ms |
| Auto-reconnection | 20-40ms |
| Protection | Integrated over-temperature protection with self-restart |
| Protection device | Semiconductor fuse, 40A |
| Discharge resistor | CDR-22 |
| Trigger input | 12-24V DC, potential-free. T+ positive, T- is 0V DC reference |
| Compatibility | Delta-connected capacitor banks of the same rated voltage |
| Ambient range | -10C to 55C |
THYRISTOR SWITCHING MODULE · 25 kVAR
ThyroLink-25: 25 kVAR Thyristor Switching Module
The standard rating for industrial APFC panels, and Ensyrec’s most-specified module. At this rating, contactors switch often enough that welding and mechanical wear show up within the first year or two.
| Rating | 25 kVAR |
| Voltage | 415V |
| Current | 50A |
| Dimensions (L x B x H) | 265mm x 130mm x 235mm |
| Switching time | Under 9ms |
| Auto-reconnection | 20-40ms |
| Protection | Integrated over-temperature protection with self-restart |
| Protection device | Semiconductor fuse, 80A |
| Discharge resistor | CDR-22 |
| Trigger input | 12-24V DC, potential-free. T+ positive, T- is 0V DC reference |
| Compatibility | Delta-connected capacitor banks of the same rated voltage |
| Ambient range | -10C to 55C |
THYRISTOR SWITCHING MODULE · 50 kVAR
ThyroLink-50: 50 kVAR Thyristor Switching Module
Built for larger industrial panels: cement plants, steel mills, and heavy-duty correction steps, where APFC panels often run without a maintenance window.
| Rating | 50 kVAR |
| Voltage | 415V |
| Current | 100A |
| Dimensions (L x B x H) | 265mm x 130mm x 235mm |
| Switching time | Under 9ms |
| Auto-reconnection | 20-40ms |
| Protection | Integrated over-temperature protection with self-restart |
| Protection device | Semiconductor fuse, 160A |
| Discharge resistor | CDR-22 |
| Trigger input | 12-24V DC, potential-free. T+ positive, T- is 0V DC reference |
| Compatibility | Delta-connected capacitor banks of the same rated voltage |
| Ambient range | -10C to 55C |
THYRISTOR SWITCHING MODULE · 100 kVAR
ThyroLink-100: 100 kVAR Thyristor Switching Module
For heavy industrial loads and large single-step correction, where a contactor failure is not a minor fault, it is a large single step failing with proportionally larger inrush risk.
| Rating | 100 kVAR |
| Voltage | 415V |
| Current | 145A |
| Dimensions (L x B x H) | 325mm x 130mm x 235mm |
| Switching time | Under 9ms |
| Auto-reconnection | 20-40ms |
| Protection | Integrated over-temperature protection with self-restart |
| Protection device | Semiconductor fuse, 280A |
| Discharge resistor | CDR-22 |
| Trigger input | 12-24V DC, potential-free. T+ positive, T- is 0V DC reference |
| Compatibility | Delta-connected capacitor banks of the same rated voltage |
| Ambient range | -10C to 55C |
Need more than 100 kVAR in one step? Two ThyroLink units cannot be paralleled onto one capacitor bank. Add separate steps instead, or connect one unit across two capacitor banks provided the combined rating stays within the unit kVAR. Talk to an engineer →
ADDITIONAL RATINGS
Fine-step and high-voltage variants
Beyond the standard 4-model range, available on request for specific installations.
1+2+2 kVAR · 415V · 73A
ThyroLink-1+2+2
Multi-step fine correction where load swings are small and frequent.
5+5 kVAR · 415V · 73A
ThyroLink-5+5
Dual-step correction for panels needing two independent 5 kVAR stages.
100 kVAR · 690V · 145A
ThyroLink-100 (690V)
High-voltage variant (650–720V, typ. 690V) for medium-voltage-adjacent installations. 480V/60Hz systems available on request.
All variants share the same zero-crossing switching, -10°C to 55°C ambient rating, and over-temperature self-restart protection as the standard range. Talk to an engineer →
ACCESSORIES
Panel components for your APFC build
Supporting components for capacitor bank panels using ThyroLink switching.
CDR22 Discharge Resistor
Discharges capacitors and reactors for fast switching in ThyroLink applications.
440VAC · 22kΩ · Delta connection · Panel mounting · For 10/25/50/100 kVAR modules
Automatic Power Factor Controller
Controls and monitors the capacitor bank switching sequence and power factor.
100–440V input · 3 to 12 outputs · IP43 front plate · 144x144x43mm
Buffer Card (16CH)
16-channel current amplifier for the APFC controller’s digital switching signal.
10–24V DC input · 24V DC / 1A output · Open collector · 16 channels
Pricing and lead times for additional ratings and accessories are quoted per requirement. Request a Quote →