Solid State Relays - Industrial Mount

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RM1A Zero Switching SSRs

Carlo Gavazzi RM1A Zero Switching SSRs are industrial single-phase AC Solid State Relays (SSRs) with a built-in varistor. This built-in varistor secures transient protection for heavy industrial applications. These SSRs utilize Direct Copper Bonding (DCB) technology and feature self-lifting terminals, a clip-on IP20 protection cover, and an LED indicator. The RM1A SSRs can be used for resistive, inductive, and capacitive loads. These zero-switching relays switch ON when the sinusoidal curve crosses zero and OFF when the current crosses zero. The RM1A SSRs offer up to 1400V_P blocking voltage, >4000V_ACrms opto-isolation, and two input ranges, including 3V_DC to 32V_DC and 20V_AC to 280V_AC/22V_DC to 48V_DC.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (HKD) Filter the results in the table by unit price based on your quantity.	Qty.	Product	Type	Mounting Style	Load Current Rating	Load Voltage Rating	Relay Contact Form	Output Type	Control Voltage Range	Input Current	Minimum Operating Temperature	Maximum Operating Temperature	IP Rating	Series	Length	Width	Height
Solid State Relays - SSRs SSR ZS 230V 50A 4.5-32 VDC LED RM1A23D50 Carlo Gavazzi 1: HK$523.20 647In Stock	Mfr. Part No. RM1A23D50 Mouser Part No 225-RM1A23D50	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 230V 50A 4.5-32 VDC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	647In Stock	HK$523.20 HK$496.98 HK$478.32 HK$451.52	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	50 A	230 VAC	1 Form A (SPST-NO)	Zero Switching	3 VDC to 32 VDC	12 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 480V 75A 24-265 VAC LED RM1A48A75 Carlo Gavazzi 1: HK$940.20 17In Stock	Mfr. Part No. RM1A48A75 Mouser Part No 225-RM1A48A75	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 480V 75A 24-265 VAC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	17In Stock	HK$940.20 HK$921.46 HK$875.10 HK$835.65 View HK$828.17 Quote	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	75 A	480 VAC	1 Form A (SPST-NO)	Zero Switching	20 VAC to 280 VAC, 22 VDC to 48 VDC	20 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 230V 50A 24-265 VAC LED RM1A23A50 Carlo Gavazzi 1: HK$531.01 44In Stock	Mfr. Part No. RM1A23A50 Mouser Part No 225-RM1A23A50	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 230V 50A 24-265 VAC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	44In Stock	HK$531.01 HK$504.46 HK$477.91 HK$461.96	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	50 A	230 VAC	1 Form A (SPST-NO)	Zero Switching	20 VAC to 280 VAC, 22 VDC to 48 VDC	20 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 230V 25A 4.5-32 VDC LED RM1A23D25 Carlo Gavazzi 1: HK$460.73 49In Stock	Mfr. Part No. RM1A23D25 Mouser Part No 225-RM1A23D25	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 230V 25A 4.5-32 VDC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	49In Stock	HK$460.73 HK$437.63 HK$414.62 HK$400.81	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	25 A	230 VAC	1 Form A (SPST-NO)	Zero Switching	3 VDC to 32 VDC	12 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 480V 50A 24-265 VAC LED RM1A48A50 Carlo Gavazzi 1: HK$671.57 23In Stock	Mfr. Part No. RM1A48A50 Mouser Part No 225-RM1A48A50	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 480V 50A 24-265 VAC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	23In Stock	HK$671.57 HK$637.95 HK$604.42 HK$584.20	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	50 A	480 VAC	1 Form A (SPST-NO)	Zero Switching	20 VAC to 280 VAC, 22 VDC to 48 VDC	20 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 480V 100A 4.5-32VDC LED RM1A48D100 Carlo Gavazzi 1: HK$1,296.29 17In Stock	Mfr. Part No. RM1A48D100 Mouser Part No 225-RM1A48D100	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 480V 100A 4.5-32VDC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	17In Stock	HK$1,296.29 HK$1,231.44 HK$1,166.66 Quote Quote	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	100 A	480 VAC	1 Form A (SPST-NO)	Zero Switching	4 VDC to 32 VDC	12 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 480V 50A 4.5-32 VDC LED RM1A48D50 Carlo Gavazzi 1: HK$609.10 57In Stock	Mfr. Part No. RM1A48D50 Mouser Part No 225-RM1A48D50	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 480V 50A 4.5-32 VDC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	57In Stock	HK$609.10 HK$578.61 HK$548.19 HK$529.86	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	50 A	480 VAC	1 Form A (SPST-NO)	Zero Switching	4 VDC to 32 VDC	12 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 600V 100A 24-265VAC LED RM1A60A100 Carlo Gavazzi 1: HK$1,624.27 9In Stock	Mfr. Part No. RM1A60A100 Mouser Part No 225-RM1A60A100	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 600V 100A 24-265VAC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	9In Stock	HK$1,624.27 HK$1,543.06 HK$1,461.84 Quote Quote	Min.: 1 Mult.: 1	Solid State Relays												RM1A
Solid State Relays - SSRs SSR ZS 600V 50A 24-265 VAC LED RM1A60A50 Carlo Gavazzi 1: HK$866.80 19In Stock	Mfr. Part No. RM1A60A50 Mouser Part No 225-RM1A60A50	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 600V 50A 24-265 VAC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	19In Stock	HK$866.80 HK$823.40 HK$780.08 HK$754.10	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	50 A	600 VAC	1 Form A (SPST-NO)	Zero Switching	20 VAC to 280 VAC, 22 VDC to 48 VDC	20 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 600V 100A 4.5-32VDC LED RM1A60D100 Carlo Gavazzi 1: HK$1,475.90 23In Stock 85Expected 7/10/2026	Mfr. Part No. RM1A60D100 Mouser Part No 225-RM1A60D100	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 600V 100A 4.5-32VDC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	23In Stock 85Expected 7/10/2026	HK$1,475.90 HK$1,402.09 HK$1,328.27 Quote Quote	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	100 A	600 VAC	1 Form A (SPST-NO)	Zero Switching	4 VDC to 32 VDC	12 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 600V 50A 4.5-32 VDC LED RM1A60D50 Carlo Gavazzi 1: HK$741.86 38In Stock	Mfr. Part No. RM1A60D50 Mouser Part No 225-RM1A60D50	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 600V 50A 4.5-32 VDC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	38In Stock	HK$741.86 HK$704.70 HK$667.63 HK$645.35	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	50 A	600 VAC	1 Form A (SPST-NO)	Zero Switching	4 VDC to 32 VDC	12 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 230V 25A 24-265 VAC LED RM1A23A25 Carlo Gavazzi 1: HK$468.54 23In Stock	Mfr. Part No. RM1A23A25 Mouser Part No 225-RM1A23A25	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 230V 25A 24-265 VAC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	23In Stock	HK$468.54 HK$445.11 HK$421.69 HK$407.63	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	25 A	230 VAC	1 Form A (SPST-NO)	Zero Switching	20 VAC to 280 VAC, 22 VDC to 48 VDC	20 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	58.2 mm
Solid State Relays - SSRs SSR ZS 230V 75A 24-265 VAC LED RM1A23A75 Carlo Gavazzi 1: HK$879.54 7In Stock	Mfr. Part No. RM1A23A75 Mouser Part No 225-RM1A23A75	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 230V 75A 24-265 VAC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	7In Stock	HK$879.54 HK$835.56 HK$791.59 HK$765.20	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	75 A	230 VAC	1 Form A (SPST-NO)	Zero Switching	20 VAC to 280 VAC, 22 VDC to 48 VDC	20 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 230V 75A 4.5-32 VDC LED RM1A23D75 Carlo Gavazzi 1: HK$819.95 16In Stock	Mfr. Part No. RM1A23D75 Mouser Part No 225-RM1A23D75	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 230V 75A 4.5-32 VDC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	16In Stock	HK$819.95 HK$778.93 HK$737.91 HK$713.33	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	75 A	230 VAC	1 Form A (SPST-NO)	Zero Switching	3 VDC to 32 VDC	12 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 400V 50A 4.5-32 VDC LED RM1A40D50 Carlo Gavazzi 1: HK$741.86 4In Stock 20Expected 8/10/2026	Mfr. Part No. RM1A40D50 Mouser Part No 225-RM1A40D50	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 400V 50A 4.5-32 VDC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	4In Stock 20Expected 8/10/2026	HK$741.86 HK$704.70 HK$667.63 HK$645.35	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	50 A	400 VAC	1 Form A (SPST-NO)	Zero Switching	4 VDC to 32 VDC	12 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 480V 100A 24-265VAC LED RM1A48A100 Carlo Gavazzi 1: HK$1,460.28 7In Stock	Mfr. Part No. RM1A48A100 Mouser Part No 225-RM1A48A100	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 480V 100A 24-265VAC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	7In Stock	HK$1,460.28 HK$1,387.21 HK$1,314.21 Quote Quote	Min.: 1 Mult.: 1	Solid State Relays												RM1A
Solid State Relays - SSRs SSR ZS 480V 25A 24-265 VAC LED RM1A48A25 Carlo Gavazzi 1: HK$601.29 20In Stock	Mfr. Part No. RM1A48A25 Mouser Part No 225-RM1A48A25	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 480V 25A 24-265 VAC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	20In Stock	HK$601.29 HK$571.21 HK$541.12 HK$523.12	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	25 A	480 VAC	1 Form A (SPST-NO)	Zero Switching	20 VAC to 280 VAC, 22 VDC to 48 VDC	20 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 480V 25A 4.5-32 VDC LED RM1A48D25 Carlo Gavazzi 1: HK$538.82 16In Stock	Mfr. Part No. RM1A48D25 Mouser Part No 225-RM1A48D25	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 480V 25A 4.5-32 VDC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	16In Stock	HK$538.82 HK$511.86 HK$484.90 HK$468.70	Min.: 1 Mult.: 1	Solid State Relays												RM1A
Solid State Relays - SSRs SSR ZS 600V 25A 4.5-32 VDC LED RM1A60D25 Carlo Gavazzi 1: HK$624.72 11In Stock	Mfr. Part No. RM1A60D25 Mouser Part No 225-RM1A60D25	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 600V 25A 4.5-32 VDC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	11In Stock	HK$624.72 HK$593.48 HK$562.25 HK$543.51	Min.: 1 Mult.: 1	Solid State Relays												RM1A
Solid State Relays - SSRs SSR ZS 600V 25A 24-265 VAC LED RM1A60A25 Carlo Gavazzi 1: HK$741.86 9In Stock	Mfr. Part No. RM1A60A25 Mouser Part No 225-RM1A60A25	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 600V 25A 24-265 VAC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	9In Stock	HK$741.86 HK$704.70 HK$667.63 HK$645.35	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	25 A	600 VAC	1 Form A (SPST-NO)	Zero Switching	20 VAC to 280 VAC, 22 VDC to 48 VDC	12 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 480V 75A 4.5-32 VDC LED RM1A48D75 Carlo Gavazzi 1: HK$898.04 20On Order	Mfr. Part No. RM1A48D75 Mouser Part No 225-RM1A48D75	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 480V 75A 4.5-32 VDC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	20On Order	HK$898.04 HK$853.07 HK$808.19 HK$781.23	Min.: 1 Mult.: 1	Single Phase Relays	SSR	Panel Mount	75 A	480 VAC	1 Form A (SPST-NO)	Zero Switching	3 VDC to 32 VDC	12 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 600V 75A 4.5-32 VDC LED RM1A60D75 Carlo Gavazzi 1: HK$1,163.54 20Expected 26/10/2026	Mfr. Part No. RM1A60D75 Mouser Part No 225-RM1A60D75	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 600V 75A 4.5-32 VDC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	20Expected 26/10/2026	HK$1,163.54 HK$1,105.34 HK$1,047.15 Quote Quote	Min.: 1 Mult.: 1	Solid State Relays												RM1A
Solid State Relays - SSRs SSR ZS 230V 100A 24-265VAC LED RM1A23A100 Carlo Gavazzi 20: HK$1,261.11 Non-Stocked Lead-Time 10 Weeks	Mfr. Part No. RM1A23A100 Mouser Part No 225-RM1A23A100	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 230V 100A 24-265VAC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	Non-Stocked Lead-Time 10 Weeks	HK$1,261.11 HK$1,194.78 Quote Quote	Min.: 20 Mult.: 1	Solid State Relays												RM1A
Solid State Relays - SSRs SSR ZS 230V 100A 4.5-32VDC LED RM1A23D100 Carlo Gavazzi 20: HK$1,127.62 Non-Stocked Lead-Time 10 Weeks	Mfr. Part No. RM1A23D100 Mouser Part No 225-RM1A23D100	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 230V 100A 4.5-32VDC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	Non-Stocked Lead-Time 10 Weeks	HK$1,127.62 HK$1,068.27 Quote Quote	Min.: 20 Mult.: 1	Single Phase Relays	SSR	Panel Mount	100 A	230 VAC	1 Form A (SPST-NO)	Zero Switching	3 VDC to 32 VDC	12 mA	- 20 C	+ 100 C	IP20	RM1A	58.2 mm	44.8 mm	28.8 mm
Solid State Relays - SSRs SSR ZS 400V 25A 24-265 VAC LED RM1A40A25 Carlo Gavazzi 20: HK$704.70 Non-Stocked Lead-Time 10 Weeks	Mfr. Part No. RM1A40A25 Mouser Part No 225-RM1A40A25	Carlo Gavazzi	Solid State Relays - SSRs SSR ZS 400V 25A 24-265 VAC LED Learn More about Carlo Gavazzi rm1a zero switching ssrs	Datasheet	Non-Stocked Lead-Time 10 Weeks	HK$704.70 HK$667.63 HK$645.35	Min.: 20 Mult.: 1	Solid State Relays												RM1A

RM1A Zero Switching SSRs

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