The GRT508HA is a 100A two-pole latching relay designed for smart energy metering and prepaid meter circuits. It uses AgSnO2 contacts and requires only impulse excitation to switch and hold state, so the coil does not need continuous power. The relay is TUV UC3 compliant and supports custom assemblies with flexible wire, copper straps or an integrated shunt.
Key Features
100A two-pole switching: Two sets of contacts support 100A resistive load with 250VAC maximum switching voltage.
Impulse excitation only: Single and double coil versions hold state without continuous coil power.
UC3 and RoHS compliance: TUV UC3 certification and RoHS compliance suit EU metering projects.
Low coil power, compact body: 100A load capability in a 70 x 52 x 21.9 mm outline.
Custom assembly options: Flexible wire, copper strap and integrated shunt builds are available.
Technical Specifications
Model
GRT508HA
Relay Type
2-pole latching relay
Rated Load (Resistive)
100A
Contact Material
AgSnO2
Max. Switching Current
100A
Max. Switching Voltage
250VAC
Coil Voltage
5-48 VDC
Mechanical Endurance
100,000 operations
Electrical Endurance
10,000 ops at 80A 250VAC; 6,000 ops at 100A 250VAC
Max. Short-Circuit Current
3,000A/10ms and 6,000A/10ms (no explosion)
Dielectric Strength
4KV between coil and contacts
Ambient Temperature
-40 C to +85 C
Installation Form
Fast connection
Outline Dimensions
70 x 52 x 21.9 mm
Compliance
RoHS; IEC 62055-31 UC3
Certification
TUV UC3, cert. no. AK 50231893 0001
Models and Options
ModelGRT508HA
Coil Voltage5-48 VDC
Coil ExcitationSingle or double coil, impulse excitation only
Contact Configuration2-pole, two sets of contacts
Custom AssembliesFlexible wire, copper strap or integrated shunt
InstallationFast connection
Materials and Structure
The GRT508HA uses copper and plastic construction with AgSnO2 contacts. The compact housing measures 70 x 52 x 21.9 mm and uses a fast connection installation form. The two-pole contact structure provides two sets of contacts for 100A resistive switching in metering circuits.
Applications
Smart electricity meters
Prepaid meter circuits
Energy measurement modules
Smart home switching
Smart energy metering projects
Customization
Custom assemblies are available with flexible wire and/or copper straps and/or an integrated shunt. Coil voltage can be specified from 5 to 48 VDC. Contact sales for application-specific assembly requirements.
FAQ
What is the rated load of the GRT508HA?
The rated resistive load is 100A, with a maximum switching voltage of 250VAC.
What coil voltage is available?
The coil voltage range is 5-48 VDC.
Does the relay need continuous coil power?
No. The GRT508HA uses impulse excitation and maintains state without continuous power. It is available for single and double coil operation.
Is the GRT508HA UC3 compliant?
Yes. TUV Rheinland certificate AK 50231893 0001 covers the GRT508HA to IEC 62055-31:2005 and EN 62055-31:2005 for electricity metering payment systems.
What is the dielectric strength?
Dielectric strength is 4KV between coil and contacts.
What are the life ratings?
Mechanical endurance is 100,000 operations. Electrical endurance is 10,000 operations at 80A 250VAC or 6,000 operations at 100A 250VAC.
Can the relay be supplied with custom wire or shunt?
Yes. Custom assemblies can include flexible wire, copper straps and an integrated shunt.
What is the short-circuit capability?
The GRT508HA is rated for 3,000A/10ms and 6,000A/10ms short-circuit current with no explosion.
Inquiry Information
Contact Zhejiang Great Electrical Co., Ltd. for GRT508HA specifications, samples and custom assembly requirements.
ContactAnnie
Mobile+86 13626734569
WhatsApp+86 18057329886
Emailsales5@great-relay.com
AddressNo.9 Linhu Avenue, Yaozhuang Town, Jiashan County, Jiaxing City, Zhejiang Province, China
