86467-1R Reliance Electric Single‑Phase SCR Rectifier Stack
The 86467-1R is a heavy‑duty single‑phase fully controlled SCR (thyristor) rectifier stack designed by Reliance Electric (now part of ABB Baldor‑Reliance) for industrial DC drive and power conversion applications. It converts single‑phase AC input into regulated DC output via phase‑angle control, serving as a compact, robust power core for low‑to‑medium horsepower drives, including Reliance MaxPak and S4 series units. The “1R” suffix denotes a single‑phase, standard industrial grade with a single heat sink and integrated power components, optimized for 230V or 460V single‑phase systems in space‑constrained or cost‑sensitive installations. Every unit undergoes factory load testing, thermal cycling, and insulation verification to ensure reliable performance in harsh industrial environments.
Description
86467-1R Reliance Electric Single‑Phase SCR Rectifier Stack
Product Overview
The 86467-1R is a heavy‑duty single‑phase fully controlled SCR (thyristor) rectifier stack designed by Reliance Electric (now part of ABB Baldor‑Reliance) for industrial DC drive and power conversion applications. It converts single‑phase AC input into regulated DC output via phase‑angle control, serving as a compact, robust power core for low‑to‑medium horsepower drives, including Reliance MaxPak and S4 series units. The “1R” suffix denotes a single‑phase, standard industrial grade with a single heat sink and integrated power components, optimized for 230V or 460V single‑phase systems in space‑constrained or cost‑sensitive installations. Every unit undergoes factory load testing, thermal cycling, and insulation verification to ensure reliable performance in harsh industrial environments.
Model Nomenclature
The model number 86467-1R follows Reliance’s standard naming structure. The prefix 86467 identifies it as part of the single‑phase rectifier stack series. The digit 1 indicates single‑phase configuration, and R stands for standard industrial grade with a single heat sink assembly.
Key Electrical Specifications
The 86467-1R is engineered for single‑phase industrial power conversion. It accepts a single‑phase AC input of 230 VAC or 460 VAC at 50/60 Hz. The DC output is rated for 45 amperes continuous current, with a maximum output voltage of 600 VDC. The topology is a single‑phase fully controlled bridge utilizing two press‑pack SCR modules, ensuring efficient and precise power regulation. Full‑load efficiency reaches 97% or higher, with a maximum forward voltage drop of 1.5V per SCR. Insulation resistance is ≥500 MΩ at 1000 VDC. It supports a di/dt rating of up to 100 A/μs and a dv/dt rating of up to 500 V/μs. Integrated protection includes RC snubbers, MOVs, and thermal cutoffs, safeguarding against overvoltage, overcurrent, and overheating.
Mechanical Construction and Features
Built for durability and compactness, the 86467-1R features a heavy‑gauge metal base with a single vertical finned aluminum heat sink. The central carrier houses two press‑pack SCR modules, with high‑temperature thermal paste minimizing thermal resistance. A gate drive circuit board is mounted at the top, connected to tin‑plated copper terminal blocks for low‑resistance, corrosion‑resistant connections. The assembly is rated IP20 for dust resistance and limited live‑part access, and it withstands vibration from 10 Hz to 1000 Hz at up to 5g. Its compact footprint enables direct drop‑in replacement of legacy single‑phase stacks, including 86467-0R and 86467-2R.
Environmental Specifications
The 86467-1R operates reliably across a wide temperature range: ‑20°C to +85°C (short‑term up to +100°C). Storage temperature ranges from ‑40°C to +85°C. It handles 5% to 95% non‑condensing relative humidity. The unit is vibration‑tested to 10–1000 Hz at 5g and can be installed at altitudes up to 1000 meters without derating; derating is required above 1000 meters. The enclosure rating is IP20.
Compatibility and Applications
The 86467-1R is fully compatible with Reliance MaxPak (up to 50 HP) and S4 series single‑phase DC drives. It serves as a reliable upgrade for older single‑phase rectifier stacks. Typical applications include small‑scale manufacturing conveyors, material handling equipment, light‑duty DC motors, and industrial machinery requiring compact, cost‑effective single‑phase AC‑to‑DC conversion. Its single‑phase design and robust protection make it ideal for 230V/460V systems with moderate loads and limited installation space.
Lifecycle and Warranty
Original 86467-1R units are no longer in production. The current market offers refurbished, surplus new old stock, and tested used units. Refurbished units undergo full disassembly, cleaning, component replacement (SCRs, capacitors, gate boards), and a minimum 4‑hour load test. As of 2026, refurbished units range from $3,200 to $3,800, while surplus new units are priced $5,500 to $6,200. The standard warranty is 12 months, covering material and workmanship defects under normal use. Warranty excludes unauthorized modification, improper installation, overvoltage/overcurrent damage, mechanical impact, or operation beyond rated environmental limits.
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