Spec SheetThe Square D Type A thermal overload unit is engineered to safeguard motors, controllers, and branch circuit conductors from excessive heating caused by prolonged over currents up to and including locked rotor currents. It operates by passing the motor current through a small heater winding, which melts a special solder under overload conditions, allowing a ratchet wheel to spin free and open the control circuit contacts.
Designed with a one-piece construction, this thermal unit responds to overload conditions according to trip curves, with a trip time of 20 seconds or less. Proper selection is based on the motor's full load current and a corresponding selection table.
- Motor Tripping Class: 20
- Thermal Overload Type: Melting alloy
- Trip Time: 20 seconds or less
- Material: Metal
- Color: Not specified
- UPC: 785901585275
Technical Specifications
| Persona Type Ids | EU, LC, OM, OM8, PB, SC |
| Persona Type Names | End User, Contractor, Original Equipment Manufacturer, OEM - Control Panelbuilder, Panel Builder, Electrician |
| Market Segmentation Id | COMMERCIAL, INDUSTRIAL |
| Market Segmentation | Commercial, Industrial |
| Carbon Footprint Of The Distribution Phase A4 | 0.015062784881700087, 0 kg CO2 eq. |
| Carbon Footprint Of The End Of Life Phase C1 To C4 | 0 kg CO2 eq., 0.02152658808101991 |
| Carbon Footprint Of The Installation Phase A5 | 0.0060760025185404255, 0 kg CO2 eq. |
| Carbon Footprint Of The Manufacturing Phase A1 To A3 | 0.1 kg CO2 eq., 0.09658369691863965 |
| Carbon Footprint Of The Use Phase B2 B3 B4 B6 | 13 kg CO2 eq., 12.638798994081128 |
| Local Data Status | Publishable |
| Local Publishable Date | 2025-11-13 |
| Return Indicator | Y |
| Stocking Flag | N |
| Stock Policy | 2 |
| Weee Scope | Out |
| Scope Perimeter | Outside of Europe |
| Eoli Availability Display | No need of specific recycling operations |
| Reach Full Compliance Status | Reference contains Substances of Very High Concern above the threshold |
| Reach Full Compliance Status Id | CONTAINS_SVHC |
| Reach Compliance Directive | Reference contains Substances of Very High Concern above the threshold |
| Rohs Eur In Scope | No |
| Rohs Eur Status | Compliant By Exemption |
| Rohs Eur Full Compliance Status | Compliant By Exemption |
| China Rohs In Scope | No |
| China Rohs Label | 7 |
| With Recycled Cardboard | Yes |
| Without Single Use Plastic | Yes |
| Product Contributes To Saved And Avoided Emissions | No |
| Tier Id | 1 |
| Tier | 1 |
| Function Option Id | STANDARD |
| Function Option | Standard |
| Product Kit Identifier | N |
| Energy Efficiency Optimized | False |
| Motor Tripping Class | 20 |
Product Documents
For best matching, check Square D Type A Melting Alloy Thermal Overload Unit Class 20 A2.31 against the equipment schedule, enclosure needs, wiring method, and project specifications.
There are no reviews for this product.
No questions about this product.
