Product Listing Title
1-Pole 90A PCB Latching Relay GRT508BG 4KV Coil Isolation
90A resistive loadAgSnO2 contactsIEC62055-31 UC238 x 30 x 16.5 mm
GRT508BG 90A PCB Latching Relay for Smart and Prepaid Energy Meters
Product Summary
The GRT508BG is a single-pole latching relay designed for smart metering hardware. It switches a 90A resistive load at up to 250VAC, keeps its contact position after a pulse and holds state without continuous coil power, which suits smart electricity meters, energy measurement modules and smart home control boards. AgSnO2 contacts, 4KV dielectric strength between coil and contacts and IEC62055-31 UC2 compliance answer the electrical and safety requirements of meter designers. The relay is PCB soldering mounted and measures 38 x 30 x 16.5 mm.
GRT508BG 90A latching relay, PCB terminal version
Key Features
90A Contact SwitchingRated resistive load 90A at max 250VAC switching voltage, so one relay covers the high-current path of a meter instead of parallel devices.
4KV Coil-to-Contact Isolation4KV dielectric strength between coil and contacts separates the control pulse circuit from the load side in meter designs.
IEC62055-31 UC2 and RoHSCompliant with IEC62055-31 UC2 and produced as an environmental protection product according to RoHS requirements.
100,000 Mechanical OperationsMechanical endurance of 100,000 OPS supports long service intervals in continuously connected metering equipment.
Short-Circuit WithstandMax short-circuit current 2500A/10ms and 4500A/10ms without explosion for fault conditions on the load circuit.
Compact PCB FootprintOutline 38 x 30 x 16.5 mm with PCB installation keeps the relay inside compact meter housings.
Technical Specifications
| Parameter | Value |
|---|
| Rated Load (resistive) | 90A |
| Contact Material | AgSnO2 |
| Max. Switching Current | 90A |
| Max. Switching Voltage | 250VAC |
| Coil Voltage | 5-24 VDC |
| Dielectric Strength (coil to contacts) | 4KV |
| Mechanical Endurance | 100,000 OPS |
| Max. Short-Circuit Current | 2500A/10ms and 4500A/10ms (no explosion) |
| Ambient Temperature | -40C to +85C |
| Installation Form | PCB |
| Outline Dimensions | 38 x 30 x 16.5 mm |
| Compliance | IEC62055-31 UC2; RoHS compliant |
Models and Options
- Coil voltage: 5-24 VDC range, selected against the meter pulse drive circuit.
- Pole configuration: 1-pole latching relay.
- Application configurations: the platform is offered as a smart meter latching relay, prepaid meter latching relay, smart home latching relay and custom latching relay.
- Mounting: PCB soldering type, with screw mounting accepted in metering assemblies according to the published working condition.
Materials and Structure
Contacts are made of AgSnO2 for the 90A resistive switching duty. The relay body is built from copper and plastic, with a latching structure that is pulse-driven so the contact state is maintained after the pulse ends. Terminals are arranged for PCB soldering, and the complete unit measures 38 x 30 x 16.5 mm.
Applications
The GRT508BG is used for on-off control of energy meter circuits with low power consumption latching after switching. Typical matched equipment is a smart electricity meter or an energy measurement module, where high shock and vibration resistance, long mechanical life and low coil power consumption are required.
- Smart energy metering projects and prepaid metering circuits
- Energy measurement modules inside electricity meters
- Smart home control boards needing state memory after power removal
- Working conditions: -40C to +85C, 5%-85%RH non-condensing, altitude up to 2000 m, no corrosive gas or explosive dust, resistive load
- Metering projects referencing markets such as Denmark, Brazil, Germany, India, Japan, the United States, Vietnam and South Africa
38 x 30 x 16.5 mm body for compact meter housings
AgSnO2 contact pins arranged for PCB soldering
Customization
Coil voltage can be specified anywhere inside the 5-24 VDC range to match the drive circuit of your meter design, and the relay is offered as a custom latching relay configuration. Zhejiang Great Electrical was founded in 2003, operates a 50,000 m2 factory with 500 employees and a 60-engineer R and D team, and exports 55% of output with main markets in the EU and India. Share your load profile, coil drive and annual volume with the sales team to confirm the configuration.
FAQ
What load can the GRT508BG switch?
It is rated for a 90A resistive load, with a maximum switching current of 90A and maximum switching voltage of 250VAC.
Which coil voltages are available?
Coil voltage options sit in the 5-24 VDC range, so the relay can be matched to the pulse drive used on the meter board.
How does a latching relay reduce power use in a meter?
Switching is pulse-driven and the contact state is maintained without continuous power supply, so the coil is not energised between switching events.
What short-circuit current can it withstand?
Maximum short-circuit current is 2500A/10ms and 4500A/10ms with no explosion.
Which standards and environmental requirements does it meet?
The relay complies with IEC62055-31 UC2 and is produced as an environmental protection product in line with RoHS requirements.
What contact material is used?
Contacts are AgSnO2, with a mechanical endurance of 100,000 operations.
How is the relay mounted and how large is it?
It is a PCB soldering type relay with an outline of 38 x 30 x 16.5 mm.
What is the operating environment range?
Ambient temperature -40C to +85C, relative humidity 5%-85%RH non-condensing, altitude up to 2000 m, in surroundings without corrosive gas or explosive dust, under resistive load.
Inquiry Information
Send your meter design requirements for a matched GRT508BG configuration.
Contact: Annie | Mobile / WhatsApp: +86 13626734569 / +86 18057329886
E-mail: sales5@great-relay.com | Web: en.grtrelay.com
Address: No.9 Linhu Avenue, Yaozhuang Town, Jiashan County, Jiaxing City, Zhejiang Province, China
Image Filename and Alt Suggestions
- grt508bg-90a-latching-relay-pcb-terminals-front.png - GRT508BG 90A latching relay with PCB terminals, angled front view
- grt508bg-90a-latching-relay-body-side.png - GRT508BG relay 38 x 30 x 16.5 mm plastic body, side view
- grt508bg-90a-latching-relay-contact-pins-top.png - GRT508BG latching relay AgSnO2 contact pins, top view
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