832A-1A-F-S-12VDC Song Chuan 832A-1A-F-S-12VDC Power Relay — 30A, SPST-NO, Sealed, 12 VDC Coil

The Song Chuan 832A-1A-F-S-12VDC is a heavy-duty, board-mount general-purpose power relay engineered for reliable switching of high current loads in compact control designs. Belonging to the proven 832A family, this model combines a 30 A contact rating with SPST-NO (1 Form A) contacts, a 12 VDC non-latching coil, and a sealed (S) housing that protects internal mechanisms from dust, flux, and moisture during production and service life.

Designed for robust performance and broad compliance, the 832A series carries UL/CUL (UL 508 & 873) and VDE safety approvals and conforms to RoHS 2002/95/EC. The relay offers high insulation options and dielectric strength up to 4000 Vrms, with a contact gap up to 2.0 mm to enhance isolation. The AgSnO (silver tin oxide) contact material delivers low contact resistance and excellent wear performance under inductive or resistive loads, while the sealed construction ensures consistent operation in environments where cleaning, conformal coating, or flux exposure is expected.

For designers, the 832A-1A-F-S-12VDC is an easy drop-in for power control on through-hole PCBs. Solder-pin (F) terminals simplify assembly and guarantee mechanical stability under high inrush conditions. With compact dimensions—29.0 × 24.1 × 17.3 mm—the relay conserves board real estate yet provides the headroom needed for 277 VAC switching applications common in global mains systems. The relay’s Class F insulation system supports elevated temperature resilience, further extending useful life in thermally demanding enclosures like inverter/charger bays, furnace air handlers, and compressor compartments.

From HVAC fan and compressor drives to UPS transfer and battery charging paths, appliance heating elements, power supplies, and general industrial I/O, this relay offers the dependable, certification-ready path to market that OEMs need—without complicated socketing or custom interface hardware.

Key highlights at a glance

• Heavy-duty 30 A rating with SPST-NO (1 Form A) contacts for mains switching up to 277 VAC.

• 12 VDC non-latching coil with ~155 Ω coil resistance and ~77 mA coil current for straightforward drive from low-voltage control electronics.

• Sealed, PCB-mount package using solder-pin (F) terminals; compact 29 × 24.1 × 17.3 mm footprint; AgSnO contacts; RoHS compliant.

• UL/CUL & VDE approvals and Class F insulation; high insulation / 4000 Vrms dielectric option within the family; 2.0 mm contact gap.

Why choose the 832A-1A-F-S-12VDC for your design?

Reliability under load. The 30 A contact rating paired with AgSnO metallurgy is well-suited to resistive loads (heaters, power supplies) and many inductive loads (motors, compressors, solenoids). The sealed construction stabilizes performance by keeping contaminants out, critical for manufacturing steps such as wave soldering and post-wash processes.

Safety and compliance built-in. With UL 508/873 and VDE certifications, it’s easier to pass end-product approvals. The availability of high dielectric strength (up to 4000 Vrms) and 2.0 mm contact gap variants in the 832/832A family gives engineering teams an upgrade path when extra isolation margins are required.

Compact, PCB-friendly format. Through-hole solder pins ensure durable mounting and reliable creepage/clearance compared to flying-lead or socketed solutions. The 29 × 24.1 × 17.3 mm body saves space in dense control boards while maintaining adequate heat dissipation area around high-current paths.

Thermal headroom. The Class F insulation system enables operation in elevated ambient conditions found in HVAC plenums or power electronics enclosures. It supports longevity under continuous duty or frequent cycling.

Straightforward control electronics. A 12 VDC non-latching coil with ~77 mA nominal current is easy to drive from common low-voltage rails through a transistor or low-side MOSFET, with standard flyback suppression.

Specifications

Notes: Values such as dielectric strength and contact gap are family capabilities within 832/832A variants; the 832A-1A-F-S-12VDC carries the sealed housing, SPST-NO contacts, and PCB solder-pin configuration specified above.

Applications

HVAC and building systems

• Fan and blower relays: Switch high-current single-phase motors for air handlers and exhaust fans.

• Compressor and pump control: Drive inductive loads in refrigeration and chiller systems; place the relay between mains and compressor contactors or directly on suitable motor circuits as per your ratings and local codes.

• Heating elements: Toggle 120/240/277 VAC resistive heaters, strip elements, or heat pumps with comfortable headroom at 30 A.

UPS and power conversion

• AC mains transfer: Select between utility input and inverter output in standby or line-interactive UPS designs.

• Battery charging paths: Enable/disable charging circuits or isolate battery packs during maintenance.

• Inrush-limited input switching: Combine with NTCs/PTCs or soft-start circuits to safely connect bulk capacitors in SMPS front ends.

Home and commercial appliances

• Ovens, dryers, dishwashers: Drive heating elements, pumps, and high-torque motors.

• Water heaters and circulation pumps: Switch 120/240 VAC loads with appropriate safeguards.

• Vending and ice machines: Control compressors, augers, and defrost heaters.

Industrial control and IoT gateways

• Power distribution to subsystems: Provide galvanic isolation between logic and mains feeds to actuators.

• Contact closure outputs: Implement reliable dry-contact interfaces for PLCs, RTUs, and BMS controllers.

• Lighting and ballast control: Switch high-current lighting circuits (verify ballast inrush) within specified ratings.

Design guidance & integration tips

• Drive circuitry: The 12 VDC coil (≈77 mA) can be driven from a logic-level transistor or MOSFET. Always include a flyback diode (or a snubber if faster release is needed) across the coil to protect the driver and reduce EMI.

• Thermal considerations: Place wide copper pours on the PCB for the switched path to minimize resistive heating. Keep adequate spacing from temperature-sensitive components; consider airflow if the relay will switch near its maximum current repeatedly.

• Creepage & clearance: Maintain appropriate board spacing around mains pins according to your safety standard (UL/IEC). The sealed body helps, but PCB design still determines your system’s actual creepage/clearance.

• EMC & arcing: For inductive loads, add RC snubbers (AC) or TVS diodes/varistors (DC/AC) across the load to suppress transients and extend contact life.

• Cleaning & coating: The sealed (S) construction supports washable processes and helps during conformal coating, reducing risk of flux ingress or coating wicking into the mechanism.

• Orientation & mounting: Through-hole pins provide robust support. Follow recommended solder profiles and keep mechanical vibration in check to avoid contact chatter in high-shock applications.

• Safety approvals: If your end product seeks UL/IEC certification, reference the relay’s file numbers and use conditions from the official datasheet. Select the exact 832/832A variant that meets isolation, spacing, and dielectric requirements for your category and overvoltage environment.

Compatibility within the 832/832A family

The 832/832A platform offers a wide matrix of terminal styles (PCB, quick-connect), contact forms (1A SPST-NO, 1B SPST-NC, 1C SPDT), and enclosures (open, flux-tight, sealed, washable). That means you can leverage a single mechanical footprint philosophy while tailoring contact configuration or enclosure for different models. The 832A-1A-F-S-12VDC specifically maps to:

• 832A series (enhanced variant of 832)

• 1A = SPST-NO contacts

• F = PCB solder-pin terminals

• S = sealed enclosure

• 12VDC = 12-volt coil

This coding simplifies supply chain and engineering documentation—adjacent part numbers like 832A-1A-F-C (flux-tight), 832A-1A-F-V (sealed type variant), or 832A-1C-F-S (SPDT) can be substituted at design time if your application evolves.

Reliability & materials

AgSnO contacts resist welding and provide good endurance in the presence of inrush and inductive back-EMF, which are typical in motor and transformer loads. The sealed housing limits oxidation and dust contamination, keeping contact resistance stable over time. The Class F insulation system, combined with the family’s high dielectric strength options, yields a relay well-suited for long service intervals and demanding duty cycles.

Environmental & regulatory

The relay complies with RoHS 2002/95/EC, simplifying global shipments and environmental declarations. Safety approvals (UL/CUL, VDE) support faster compliance testing for end products targeting North America and Europe. Always verify the latest official datasheet for agency conditions of acceptability, maximum switching categories, and endurance curves matched to your load type.

Three small standout features

1. Sealed, washable housing for reliable post-solder cleaning and contamination resistance.

2. AgSnO high-performance contacts optimized for both resistive and inductive loads.

3. Compact PCB footprint with through-hole solder pins for rugged, high-current connections.

Ordering information

• Model: 832A-1A-F-S-12VDC

• Description: 30 A general-purpose power relay, SPST-NO, sealed, PCB solder-pin terminals, 12 VDC coil, AgSnO contacts, RoHS compliant, UL/CUL & VDE approvals.

If your application needs SPDT contacts, quick-connect terminals, or special dielectric/insulation characteristics, consider adjacent 832/832A variants using the same coding scheme.

Summary

The Song Chuan 832A-1A-F-S-12VDC is a compact, sealed, 30 A SPST-NO power relay that brings together safety approvals, Class F thermal performance, AgSnO contact reliability, and PCB-friendly assembly. Whether you’re switching compressors, heaters, pump motors, or AC mains feeds in UPS and appliance controls, this relay provides a cost-effective, certification-ready solution with room to scale across the broader 832/832A family when requirements change.