Documentation & Downloads
Square D A21.3 Thermal Unit Type S/A Class 20, Melting Alloy, Motor Tripping 20
- MPN: A21.3
- UPC: 785901585510
- PPN: SCH-A21.3
CAD
$49.86
/ EA
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Available to Ship Same/Next Business Day if In Stock and Ordered before 12:00 PM EST
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Spec sheet
Description
Thermal units are intended to protect motors, controllers, and branch circuit conductors against excessive heating due to prolonged motor over currents up to and including locked rotor currents. Protection of the motor and the other branch circuit components from higher currents, due to short circuits or grounds, is a function of the branch circuit fuses or circuit breakers. Class 20 thermal units respond to overload current conditions according to trip curves. These thermal units will trip in 20 seconds or less on overload conditions. The proper thermal unit is selected using the motor full load current and a selection table. These thermal units have a one piece construction. The motor current passes through a small heater winding within these thermal units. Under overload conditions, the heat causes a special solder to melt allowing a ratchet wheel to spin free thus opening the control circuit contacts and opening the motor contacts.
Documentation & Downloads
Specifications
Key Specifications
- Country of Origin
- Mexico
Important Information Attributes
- Persona Type Ids
- EU, LC, OM, OM8, PB, SC
- Market Segmentation Id
- COMMERCIAL, INDUSTRIAL
- Carbon Footprint Of The Distribution Phase [A4]
- 0.015062784881700087, 0 kg CO2 eq.
- Carbon Footprint Of The Installation Phase [A5]
- 0.0060760025185404255, 0 kg CO2 eq.
- Carbon Footprint Of The Use Phase [B2, B3, B4, B6]
- 13 kg CO2 eq., 12.638798994081128
- Local Publishable Date
- 2025-11-13
- Stocking Flag
- N
- Scope Perimeter
- Outside of Europe
- Reach Full Compliance Status
- Reference contains Substances of Very High Concern above the threshold
- Reach Compliance Directive
- Reference contains Substances of Very High Concern above the threshold
- Rohs Eur Status
- Compliant By Exemption
- China Rohs In Scope
- No
- With Recycled Cardboard
- Yes
- Product Contributes To Saved And Avoided Emissions
- No
- Tier
- 1
- Function Option
- Standard
- Energy Efficiency Optimized
- False
- Product Availability
- Stock - Normally stocked in distribution facility
- Returnability
- Yes
- Sustainable Packaging
- No
- Total Lifecycle Carbon Footprint
- 13 kg CO2 eq.
- Database Version
- 2024-01
- Pcr Version
- PEP-PCR-ed4-2021 09 06
- Type Of Verification For The Pep
- Independent internal review
- Functional-unit Description
- Other switchgear and controlgear solutions mentioned in the scope (e.g. fuses TC32, all-or-nothing relays TC94, Measuring relays and protection equipment TC95), apply the general rules of PCR and mention in the accompanying report the functional unit, the reference product characteristics, the reference lifetime and the use scenario which are applied consistently with the relevant IEC technical standards.
- Functional-unit Unit
- unit
- Energy Model - Manufacturing [A1-a3]
- Electricity Mix; Low voltage; 2020; United States, US
- Energy Model - Use [B6]
- Electricity Mix; Low voltage; 2020; United States, US
- Recyclability Potential, In %
- 86
- Package Weight(Lbs)
- 13.6 g
- Warranty (In Months)
- 18
Persona Type NamesEnd User, Contractor, Original Equipment Manufacturer, OEM - Control Panelbuilder, Panel Builder, Electrician
Market SegmentationCommercial, Industrial
Carbon Footprint Of The End-of-life Phase [C1 To C4]0 kg CO2 eq., 0.02152658808101991
Carbon Footprint Of The Manufacturing Phase [A1 To A3]0.1 kg CO2 eq., 0.09658369691863965
Local Data StatusPublishable
Return IndicatorY
Weee ScopeOut
Eoli Availability DisplayNo need of specific recycling operations
Reach Full Compliance Status IdCONTAINS_SVHC
Rohs Eur In ScopeNo
Rohs Eur Full Compliance StatusCompliant By Exemption
China Rohs Label7
Without Single Use PlasticYes
Tier Id1
Function Option IdSTANDARD
Product Kit IdentifierN
Motor Tripping Class20
Range Of ProductA
Software Versionv6.2.5-6
Thermal Overload Typemelting alloy
Pep CodeENVPEP2508030EN
Pep Verification Date2025-10-08
Psr VersionPSR-0005-ed3.1-EN-2023 12 08
Data Sourceextrapolated product
Functional-unit Quantity1
Reference Lifetime, In Y20
Energy Model - Installation [A5]No energy used
Energy Model - End Of Life [C1-c4]Global, European and French datasets are used.
Nbr. Of Units In Pkg.1
Take-backNo
Environment Attributes Main
- China Rohs Regulation
- Product out of China RoHS scope , Product out of China RoHS scope. Substance declaration for your information.
- Recycled Metal Content At Cr Level
- 0 %
- Carbon Footprint
- 12.778048066481029
- Eu Rohs Directive
- Compliant By Exemption
- Packaging Without Single Use Plastic
- Yes
- Pep Code
- ENVPEP2508030EN
- Pcr Version
- PEP-PCR-ed4-2021 09 06
- Type Of Verification For The Pep
- Independent internal review
Take BackNo
Mercury FreeYes
Environmental DisclosureENVPEP2508030EN
Packaging Made With Recycled CardboardYes
Reach RegulationReference contains Substances of Very High Concern above the threshold
Pep Verification Date2025-10-08
Psr VersionPSR-0005-ed3.1-EN-2023 12 08
General Attributes
- Range Of Product
- A
Contractual Warranty Attributes
- Warranty Period
- 18 months
Warranty18 months
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CAD
$49.86
/ EA
Available to Order
Available to Ship Same/Next Business Day if In Stock and Ordered before 12:00 PM EST
Company Stock:
0
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Looking to buy a large quantity?
To view product inventory
Spec sheet
CAD$49.86/ EA
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