GRT508EA 16A Latching Relay 100k Operations for Energy Meters
16A 250VAC switching, 100,000 electrical operations, UL508 recognized component
Product Summary
The GRT508EA is a 16A latching relay from the GRT508E series, designed for energy meters and smart home controls. It provides 100,000 electrical operations at 16A 250VAC with AgSnO2 contacts. The relay latches after a pulse, requiring no continuous coil power, and features 4KV dielectric strength between coil and contacts. PCB mounting and a compact 29 x 12.7 x 15.7 mm outline make it suitable for automated assembly. It holds UL Recognized Component certification under UL508 for industrial control switches.
Key Features
- 16A 250VAC Switching: Electrical endurance of 100,000 operations at 16A 250VAC resistive load.
- Impulse Excitation Only: Single or double coil configuration available; pulse-driven latching conserves energy.
- UL508 Recognized: UL-US-L340054-21-20210202-1 certification for industrial control switches (Type GRT508EA).
- 4KV Dielectric Strength: High coil-to-contact isolation for safe metering operation.
- PCB Soldering Mount: Designed for direct PCB installation and automated production.
- RoHS Compliant: Meets environmental regulations for global markets.
Technical Specifications
| Parameter | Value |
|---|
| Contact Rating | 16A 250VAC (100,000 operations) |
| Contact Material | AgSnO2 |
| Max. Switching Voltage | 277VAC |
| Coil Voltage | 5–24 VDC |
| Mechanical Endurance | 100,000 OPS |
| Electrical Endurance | 100,000 OPS (16A 250VAC) |
| Max. Short-Circuit Current | 500A / 2ms |
| Ambient Temperature | -40℃ ~ +85℃ |
| Installation Form | PCB |
| Outline Dimensions | 29 x 12.7 x 15.7 mm |
| Dielectric Strength (coil-contacts) | 4KV |
| Certification | UL508 (UL-US-L340054-21-20210202-1) |
Models and Options
The 16A version is designated GRT508EA. Available options include:
- Coil voltage: 5 VDC to 24 VDC (specify at order)
- Coil configuration: single coil or double coil
- Contact material: AgSnO2 (standard)
For a 20A version with 60,000 electrical operations at 20A 250VAC, see the GRT508EC model.
Materials and Structure
The relay uses a flame-retardant plastic housing and copper internal conductors. Contact points are AgSnO2 (silver tin oxide). The internal structure includes a PCB-mountable base, an electromagnetic coil system, and a latching mechanism that maintains contact state after pulse removal. Outline dimensions are 29 mm (L) x 12.7 mm (W) x 15.7 mm (H). Single and double coil configurations share the same footprint.
Applications
- Smart electricity meters and energy measurement modules
- Prepaid meter on-off control circuits
- Smart home load control (lighting, HVAC, appliances)
- Industrial control panels requiring latching function
- New energy charging pile control circuits
Designed for resistive loads in ambient temperatures from -40℃ to +85℃, with relative humidity 5%~85%RH non-condensing and altitude ≤2000m.
Customization
Coil voltage (5–24 VDC) and coil configuration (single or double coil) can be specified to match your circuit design. Contact material is fixed as AgSnO2 for this model. For specific packaging or labeling requirements, please contact our sales team with your project details.
Product Images
GRT508EA16A-1 — top view
FAQ
Q: What is the electrical endurance of the GRT508EA? A: 100,000 operations at 16A 250VAC resistive load. Mechanical endurance is also 100,000 operations.
Q: Is this relay UL recognized? A: Yes, it holds UL Recognized Component certification UL-US-L340054-21-20210202-1 under UL508 18th Edition for industrial control switches (Type GRT508EA).
Q: Does it require continuous coil power to stay latched? A: No. A pulse is sufficient to set or reset the contact, and the relay maintains state without coil power.
Q: What coil voltages are available? A: Standard coil voltage range is 5 VDC to 24 VDC. Specify your required voltage when ordering.
Q: Can I use it in prepaid meters? A: Yes, it is designed for smart metering, prepaid meters, and energy measurement modules, with low coil power consumption and high shock resistance.
Q: What is the difference between GRT508EA and GRT508EC? A: GRT508EA is the 16A model with 100,000 electrical operations at 16A 250VAC and UL508 certification; GRT508EC is the 20A model with 60,000 operations at 20A 250VAC.
Inquiry Information
For pricing, samples, or technical support, contact Zhejiang Great Electrical Co., Ltd.:
Email: sales5@great-relay.com
WhatsApp: +86 180 5732 9886
Address: No.9 Linhu Avenue, Yaozhuang Town, Jiashan County, Jiaxing City, Zhejiang Province, China
Company founded 2003, 50,000m² factory, 500 employees, 60 R&D engineers, 55% export ratio.
Image Filename and Alt Suggestions
- Filename: grt508ea-16a-latching-relay-top.png — Alt: GRT508EA 16A latching relay top view with model number and PCB pins
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