832A-1C-F-C 24VDC RELAY(USED)
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The 832A-1C-F-C 24VDC is a specialized high-current power relay, typically manufactured by Song Chuan. It is significantly more robust than standard signal relays, designed specifically for high-power switching in HVAC systems, large power supplies, and automotive controllers.
832A: The series designation. The "A" usually denotes a high-power construction capable of handling significant AC current.
1C: The contact arrangement. This is SPDT (Single Pole Double Throw). It features one common terminal, one Normally Open (NO) terminal, and one Normally Closed (NC) terminal.
F: This indicates Class F Insulation. This means the relay is rated to withstand internal temperatures up to 155°C, making it much safer for high-load environments where heat buildup is common.
C: The enclosure type. Usually "C" represents a Flux-tight cover, protecting the internal mechanism from dust and liquid during the PCB soldering process.
24VDC: The nominal coil voltage required to engage the relay.
Technical Specifications
| Feature | Specification |
| Switching Capacity | 20A to 30A at 250VAC (Check your specific variant; many are rated for 30A) |
| Max Switching Power | Up to 7,500 VA (AC) |
| Coil Voltage | 24V DC |
| Contact Material | Silver Tin Oxide (AgSnO_2) - Excellent for resisting "contact welding." |
| Dielectric Strength | 2,500V AC between coil and contacts |
Unlike small signal relays, the 832A series often has a "T-shape" or "Flag" pin layout to provide physical distance between the low-voltage coil pins and the high-voltage power pins.
Pin 1 & 2: Coil inputs (24V).
Pin 3: Common (COM) — often a thicker pin to handle high current.
Pin 4: Normally Closed (NC).
Pin 5: Normally Open (NO).
Given the 30A capacity and Class F insulation, this relay is ideal for the high-power projects we have been discussing:
AC Mains Transfer: At 220V, a 30A rating allows this relay to switch a load of up to 6,600W. This makes it the perfect "Automatic Transfer Switch" (ATS) for your 2kW or 5kW inverters.
Battery Charger Disconnect: In your 24V/30A Flyback charger project, this relay can be used on the DC output side to physically disconnect the battery once it is fully charged or if a fault is detected.
Soft-Start Bypass: In high-power 2kW+ inverters, this relay is often used to bypass the NTC or power resistor once the high-voltage DC bus is stable.
If you are using this relay to switch a motor or a large transformer, the "Inrush Current" can be 5times to 10times higher than the running current. Even though this is a 30A relay, you should only use it for motors rated up to approximately 1.5HP to 2HP to ensure the contacts don't burn out prematurely.