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Morningstar ReadyRelay ReadyBlock (RB-RELAY)

Model: RB-RELAY · SKU: RB-RELAY

Prepared Nov 12, 2026

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Common specifications

Device type	ReadyBlock add-on with two SPDT relays (dry contacts, alarm signaling, load control)Source [1]
Communications	Not documented
Supported devices	Morningstar host components with the ReadyRail expansion system, such as the GenStar MPPTSource [1]
Ports	Two relays, SPDT, NO/NC/Common contactsSource [1]
Display	Not documented
Power input	Not documented
Mounting	Snaps into a ReadyRailSource [1]
Enclosure	Not documented
Operating temperature	Not documented
Weight	0.09 kg0.21 lb convertedCalculatedSource [1]
Dimensions	100.5 D × 22.2 D × 61.5 D mm3.96 D × 0.87 D × 2.42 D in convertedSource [1]
Enclosure volume	0.14 L** Calculated from recorded external dimensions
Warranty term	Not documented

All recorded specifications

Current rating	6 ADocumented claim Conditions Printed per relay as "Rated Current 6.0 A (250 Vac) 6.0 A (30 Vdc) 0.5 A (60 Vdc) 0.2 A (110 Vdc) 0.12 A (220 Vdc)"; 6.0 A is the rating at 250 Vac and 30 Vdc. The DC figures carry the note "DC rating is for resistive loads." Location: PDF page 2, specification table, Rated Current Printed per relay as "Rated Current 6.0 A (250 Vac) 6.0 A (30 Vdc) 0.5 A (60 Vdc) 0.2 A (110 Vdc) 0.12 A (220 Vdc)"; 6.0 A is the rating at 250 Vac and 30 Vdc. The DC figures carry the note "DC rating is for resistive loads." Location: PDF page 2, specification table, Rated Current Official datasheet · Morningstar ReadyRelay datasheet (MS-003813, 03/07/2023) (November 2, 2026 capture) [1]
Device type	ReadyBlock add-on with two SPDT relays (dry contacts, alarm signaling, load control)Documented claim Conditions Printed as "Dry contacts control • Alarm conditions signaling • Smart Load control" and "Each of the two (2) relays has the following electrical specifications". Location: PDF page 1, features; PDF page 2, specification table Printed as "Dry contacts control • Alarm conditions signaling • Smart Load control" and "Each of the two (2) relays has the following electrical specifications". Location: PDF page 1, features; PDF page 2, specification table Official datasheet · Morningstar ReadyRelay datasheet (MS-003813, 03/07/2023) (November 2, 2026 capture) [1]
Dimensions	100.5 D × 22.2 D × 61.5 D mm3.96 D × 0.87 D × 2.42 D in convertedDocumented claim Conditions Printed as "Dimensions 3.96 x 0.874 x 2.42 in (100.5 x 22.2 x 61.5 mm)"; no axes are named, so the figures are kept in printed order. Location: PDF page 2, specification table, Dimensions Printed as "Dimensions 3.96 x 0.874 x 2.42 in (100.5 x 22.2 x 61.5 mm)"; no axes are named, so the figures are kept in printed order. Location: PDF page 2, specification table, Dimensions Official datasheet · Morningstar ReadyRelay datasheet (MS-003813, 03/07/2023) (November 2, 2026 capture) [1]
Mounting	Snaps into a ReadyRailDocumented claim Conditions Printed as "ReadyBlocks automatically activate and are recognized, and are ready to go, immediately after being snapped into a ReadyRail." Location: PDF page 1, description Printed as "ReadyBlocks automatically activate and are recognized, and are ready to go, immediately after being snapped into a ReadyRail." Location: PDF page 1, description Official datasheet · Morningstar ReadyRelay datasheet (MS-003813, 03/07/2023) (November 2, 2026 capture) [1]
Ports	Two relays, SPDT, NO/NC/Common contactsDocumented claim Conditions Printed as "Relay Type SPDT Relay Contacts NO/NC/Common" for each of the two relays. Location: PDF page 2, specification table Printed as "Relay Type SPDT Relay Contacts NO/NC/Common" for each of the two relays. Location: PDF page 2, specification table Official datasheet · Morningstar ReadyRelay datasheet (MS-003813, 03/07/2023) (November 2, 2026 capture) [1]
Supported devices	Morningstar host components with the ReadyRail expansion system, such as the GenStar MPPTDocumented claim Conditions Printed as "available in Morningstar “host” components featuring the ReadyRail expansion system" and "ReadyRelay installed in a GenStar MPPT charger". Location: PDF page 1, description Printed as "available in Morningstar “host” components featuring the ReadyRail expansion system" and "ReadyRelay installed in a GenStar MPPT charger". Location: PDF page 1, description Official datasheet · Morningstar ReadyRelay datasheet (MS-003813, 03/07/2023) (November 2, 2026 capture) [1]
Voltage rating	250 Vac / 220 VdcDocumented claim Conditions Printed per relay as "Rated Switching Voltage* 250 Vac / 220 Vdc". Location: PDF page 2, specification table, Rated Switching Voltage Printed per relay as "Rated Switching Voltage* 250 Vac / 220 Vdc". Location: PDF page 2, specification table, Rated Switching Voltage Official datasheet · Morningstar ReadyRelay datasheet (MS-003813, 03/07/2023) (November 2, 2026 capture) [1]
Weight	0.09 kg0.21 lb convertedCalculated93.5 g / 1000 g/kg = 0.0935 kg Conditions Printed as "Weight 3.3 Ounces (93.5 grams)" (written in kg). Location: PDF page 2, specification table, Weight Printed as "Weight 3.3 Ounces (93.5 grams)" (written in kg). Location: PDF page 2, specification table, Weight Official datasheet · Morningstar ReadyRelay datasheet (MS-003813, 03/07/2023) (November 2, 2026 capture) [1]

Warranty

Certificate records

No records documented.

Sources and revisions

Morningstar ReadyRelay datasheet (MS-003813, 03/07/2023) (November 2, 2026 capture)Official datasheet · Revision MS-003813 03/07/2023 · Checked Nov 1, 2026https://www.morningstarcorp.com/wp-content/uploads/datasheet-readyrelay-en.pdf