Why Choose the Finder 68.55.9.012.4300S High Power Relay?
The Finder 68.55.9.012.4300S is a high-performance 32 A PCB-mounted power relay from the Finder 68 Series, developed for demanding power switching applications including electric vehicle charging equipment, photovoltaic inverters, uninterruptible power supplies and industrial power control systems. Featuring a 12 V DC coil, four normally open power contacts and one normally closed auxiliary contact, it combines substantial switching capability with an advanced contact arrangement for equipment safety monitoring.
The 68.55 configuration incorporates four normally open (4 NO) contacts rated at 32 A each, together with one normally closed (1 NC) auxiliary contact rated at 3 A. The normally open power contacts feature a minimum 3.6 mm contact gap, providing full-disconnection capability within the manufacturer's specified electrical ratings.
The distinguishing feature of the 4300S variant is its special construction designed to conform to IEC 62955, including 8 mm clearance and creepage distances between the normally open and normally closed contact circuits. This makes it particularly relevant to EV charging equipment incorporating residual direct current detection and associated switching functions.
With silver tin oxide (AgSnO2) contacts, reinforced coil-to-contact insulation and a low-power coil holding mode, the Finder 68.55.9.012.4300S offers an effective combination of switching performance, electrical separation and energy efficiency for modern power electronics.
Key Advantages
- Four 32 A normally open power contacts for multi-pole high-current switching.
- One 3 A normally closed auxiliary contact for suitable monitoring and control functions.
- 12 V DC operating coil for compatible electronic control circuits.
- IEC 62955 conforming special version designed for relevant EV charging applications.
- 8 mm clearance and creepage distances between NO and NC contact circuits.
- Minimum 3.6 mm NO contact gap for full-disconnection capability.
- PCB mounting supports direct integration into electronic power equipment.
- AgSnO2 contacts provide cadmium-free switching performance.
- 2.9 W nominal DC coil consumption with reduced holding power when appropriately controlled.
- Approximately 0.7 W holding power in the manufacturer's energy-saving operating mode.
- Reinforced insulation between coil and contacts supports robust electrical separation.
- Designed for EV chargers, photovoltaic inverters, UPS systems, generators and industrial power electronics.
Key Features
- Finder 68 Series high power electromagnetic relay.
- 12 V DC nominal coil voltage.
- 4 NO + 1 NC contact configuration.
- 32 A rated normally open contacts.
- 3 A rated normally closed auxiliary contact.
- Minimum 3.6 mm normally open contact gap.
- Special IEC 62955 conforming S version.
- 8 mm NO-to-NC clearance and creepage distances.
- Silver tin oxide (AgSnO2) contact material.
- 250 V AC rated contact voltage.
- 400 V AC maximum switching voltage.
- 8,000 VA AC1 switching capacity per normally open contact.
- 2.9 W nominal coil consumption.
- Energy-saving holding mode with approximately 0.7 W holding power.
- PCB solder terminals for integration into electronic assemblies.
- Reinforced coil-to-contact insulation.
- Wide operating temperature capability subject to coil drive and load conditions.
Advanced Power Switching for EV Charging and Energy Systems
The Finder 68.55.9.012.4300S is designed for applications requiring multiple high-current switching poles and an auxiliary contact. When the 12 V DC coil is energised, the four normally open power contacts close and the normally closed auxiliary contact opens. When the coil is de-energised, the power contacts return to their open positions and the auxiliary contact returns to its normally closed state.
The relay's minimum 3.6 mm contact gap provides substantial separation between open power contacts. This characteristic is particularly important in power conversion and EV charging applications where defined disconnection performance is required. The relay must nevertheless be incorporated into a complete system designed to meet the applicable electrical safety requirements.
The 4300S special version is specifically distinguished by its IEC 62955 conforming construction, including 8 mm clearance and creepage distances between the normally open and normally closed contact circuits. These features support integration into suitable EV charging equipment designs where residual DC detection and associated disconnection functions are required.
Energy efficiency is another important advantage. The relay uses approximately 2.9 W at nominal coil voltage but can operate with a reduced holding power of approximately 0.7 W when the manufacturer's energy-saving drive conditions are correctly implemented. This can reduce heat generation and power consumption in equipment where the relay remains energised for extended periods.
Typical Applications
- Electric vehicle charging stations and charging control equipment.
- EV charging systems designed to meet IEC 62955 requirements.
- Photovoltaic inverters and solar power conversion equipment.
- Uninterruptible power supplies (UPS).
- Industrial power generators and generator control systems.
- Battery energy storage and power conversion equipment.
- Industrial power distribution and switching assemblies.
- High-current PCB-based electrical control equipment.
- Power electronics requiring multiple normally open contacts and auxiliary monitoring.
- OEM energy management and industrial automation systems.
