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843-1B-C Relay Series

PC board-mounted SPST-NC relays with various coil voltages

The 843-1B-C relay series from Song Chuan Group is a lineup of board-mountable single-pole single-throw normally open (SPST-NC) relays. These relays come with different coil voltage options, making them versatile for a range of electronic and automation projects. If you're working on control systems, power distribution boards, or any application that requires switching low currents, these relays can be quite handy.

One thing worth noting is their compact design, which makes them ideal for space-constrained PCB layouts. Engineers tend to reach for these when they need reliable switching action without the bulkiness of larger relays. They are particularly useful in scenarios where you need to switch signals or small currents, such as in microcontroller projects or simple automation setups.

Another practical observation is their wide range of coil voltages. This flexibility allows you to choose the right relay for your specific power supply requirements, whether you're dealing with DC or AC sources. This is especially beneficial in environments where voltage standards might vary widely, ensuring compatibility and reliability across different applications.

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843-1B-C Relay - Part List

7 parts in total

Voltage - Supply

Current Rating (Max)

DC Resistance (DCR) (Max)

Mfr Part #Quantity AvailablePriceCategoryCurrentLoad TypeRelease TimePick Up VoltageVoltage - SupplyContact ResistanceVoltage - BreakdownCurrent Rating (Max)Insulation ResistanceVoltage Dropout (Max)Power - Average ForwardDC Resistance (DCR) (Max)Dielectric Strength, Contact to ContactVoltage - Continuous Operating (Max) (MCOV)WeightMounting TypeContact MaterialContact Layout, TypicalTypeFunctionCard StandardElectrical LifeManufacturer Part NumberOperate TimeMechanical LifeOperating RangeShock ResistanceOperating Temperature
843-1B-C-12VDC
843-1B-C-12VDC

PC Board Relay • Coil Voltage: 12 VDC • Contact Configuration: SPST-NC (1 Form B) • Current : 10 A • Mounting: PC Board Terminal • Operating Function: Single Side Stable

Song Chuan

0-10 Amps10A 120VAC, 10A 24VDC, 5A 240VAC5 ms Max.75% of rated voltage12 VDC100 Mohm Max.AC 2000V, 50/60Hz 1min.37.5 mA100 Mohm Min. (DC 500V)10% of rated voltageapprox. 0.45W320 ohmAC 750V, 50/60Hz 1min.150% of rated voltageApprox. 10 gPC BoardAgSnO alloy1B SPST-NCRelaysSingle Side StableGeneral Purpose Relay100,000 operations (frequency 1,800 operations/hr)Flux Tight10 ms Max.20,000,000 operations (frequency 18,000 operations/hr)10 to 50Hz, double amplitude 1.5 mm100G-30 to +70?C (no freezing)
843-1B-C-18VDC
843-1B-C-18VDC

PC Board Relay • Coil Voltage: 18 VDC • Contact Configuration: SPST-NC (1 Form B) • Current : 10 A • Mounting: PC Board Terminal • Operating Function: Single Side Stable

Song Chuan

0-10 Amps10A 120VAC, 10A 24VDC, 5A 240VAC5 ms Max.75% of rated voltage18 VDC100 Mohm Max.AC 2000V, 50/60Hz 1min.25 mA100 Mohm Min. (DC 500V)10% of rated voltageapprox. 0.45W720 ohmAC 750V, 50/60Hz 1min.150% of rated voltageApprox. 10 gPC BoardAgSnO alloy1B SPST-NCRelaysSingle Side StableGeneral Purpose Relay100,000 operations (frequency 1,800 operations/hr)Flux Tight10 ms Max.20,000,000 operations (frequency 18,000 operations/hr)10 to 50Hz, double amplitude 1.5 mm100G-30 to +70?C (no freezing)
843-1B-C-24VDC
843-1B-C-24VDC

PC Board Relay • Coil Voltage: 24 VDC • Contact Configuration: SPST-NC (1 Form B) • Current : 10 A • Mounting: PC Board Terminal • Operating Function: Single Side Stable

Song Chuan

0-10 Amps10A 120VAC, 10A 24VDC, 5A 240VAC5 ms Max.75% of rated voltage24 VDC100 Mohm Max.AC 2000V, 50/60Hz 1min.18.8 mA100 Mohm Min. (DC 500V)10% of rated voltageapprox. 0.45W1280 ohmAC 750V, 50/60Hz 1min.150% of rated voltageApprox. 10 gPC BoardAgSnO alloy1B SPST-NCRelaysSingle Side StableGeneral Purpose Relay100,000 operations (frequency 1,800 operations/hr)Flux Tight10 ms Max.20,000,000 operations (frequency 18,000 operations/hr)10 to 50Hz, double amplitude 1.5 mm100G-30 to +70?C (no freezing)
843-1B-C-3VDC
843-1B-C-3VDC

PC Board Relay • Coil Voltage: 3 VDC • Contact Configuration: SPST-NC (1 Form B) • Current : 10 A • Mounting: PC Board Terminal • Operating Function: Single Side Stable

Song Chuan

0-10 Amps10A 120VAC, 10A 24VDC, 5A 240VAC5 ms Max.75% of rated voltage3 VDC100 Mohm Max.AC 2000V, 50/60Hz 1min.150 mA100 Mohm Min. (DC 500V)10% of rated voltageapprox. 0.45W20 ohmAC 750V, 50/60Hz 1min.150% of rated voltageApprox. 10 gPC BoardAgSnO alloy1B SPST-NCRelaysSingle Side StableGeneral Purpose Relay100,000 operations (frequency 1,800 operations/hr)Flux Tight10 ms Max.20,000,000 operations (frequency 18,000 operations/hr)10 to 50Hz, double amplitude 1.5 mm100G-30 to +70?C (no freezing)
843-1B-C-5VDC
843-1B-C-5VDC

PC Board Relay • Coil Voltage: 5 VDC • Contact Configuration: SPST-NC (1 Form B) • Current : 10 A • Mounting: PC Board Terminal • Operating Function: Single Side Stable

Song Chuan

0-10 Amps10A 120VAC, 10A 24VDC, 5A 240VAC5 ms Max.75% of rated voltage5 VDC100 Mohm Max.AC 2000V, 50/60Hz 1min.90 mA100 Mohm Min. (DC 500V)10% of rated voltageapprox. 0.45W56 ohmAC 750V, 50/60Hz 1min.150% of rated voltageApprox. 10 gPC BoardAgSnO alloy1B SPST-NCRelaysSingle Side StableGeneral Purpose Relay100,000 operations (frequency 1,800 operations/hr)Flux Tight10 ms Max.20,000,000 operations (frequency 18,000 operations/hr)10 to 50Hz, double amplitude 1.5 mm100G-30 to +70?C (no freezing)
843-1B-C-6VDC
843-1B-C-6VDC

PC Board Relay • Coil Voltage: 6 VDC • Contact Configuration: SPST-NC (1 Form B) • Current : 10 A • Mounting: PC Board Terminal • Operating Function: Single Side Stable

Song Chuan

0-10 Amps10A 120VAC, 10A 24VDC, 5A 240VAC5 ms Max.75% of rated voltage6 VDC100 Mohm Max.AC 2000V, 50/60Hz 1min.75 mA100 Mohm Min. (DC 500V)10% of rated voltageapprox. 0.45W80 ohmAC 750V, 50/60Hz 1min.150% of rated voltageApprox. 10 gPC BoardAgSnO alloy1B SPST-NCRelaysSingle Side StableGeneral Purpose Relay100,000 operations (frequency 1,800 operations/hr)Flux Tight10 ms Max.20,000,000 operations (frequency 18,000 operations/hr)10 to 50Hz, double amplitude 1.5 mm100G-30 to +70?C (no freezing)
843-1B-C-9VDC
843-1B-C-9VDC

PC Board Relay • Coil Voltage: 9 VDC • Contact Configuration: SPST-NC (1 Form B) • Current : 10 A • Mounting: PC Board Terminal • Operating Function: Single Side Stable

Song Chuan

0-10 Amps10A 120VAC, 10A 24VDC, 5A 240VAC5 ms Max.75% of rated voltage9 VDC100 Mohm Max.AC 2000V, 50/60Hz 1min.50 mA100 Mohm Min. (DC 500V)10% of rated voltageapprox. 0.45W180 ohmAC 750V, 50/60Hz 1min.150% of rated voltageApprox. 10 gPC BoardAgSnO alloy1B SPST-NCRelaysSingle Side StableGeneral Purpose Relay100,000 operations (frequency 1,800 operations/hr)Flux Tight10 ms Max.20,000,000 operations (frequency 18,000 operations/hr)10 to 50Hz, double amplitude 1.5 mm100G-30 to +70?C (no freezing)
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