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SCHNEIDER Overload Relay: Thermal Protection, 3 Poles, 1NO/1NC - IEC Thermal Overload Relays
SCHNEIDERIEC Thermal Overload Relays

SCHNEIDER Overload Relay: Thermal Protection, 3 Poles, 1NO/1NC

The SCHNEIDER DPER21 is an IEC thermal overload relay with integrated bimetallic elements, requiring no external thermal units. It features 1NO/1NC auxiliary contacts, a maximum voltage rating of 690V AC, and phase…

SKU 3G-OTH-40511

Brand
SCHNEIDER
Item
Overload Relay: Thermal Protection, 3 Poles, 1NO/1NC
Category
IEC Thermal Overload Relays
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Technical Specifications

SCHNEIDER
Manufacturer Part Number
DPER21
Type
1NO/1NC, Phase Loss Sensitivity
Poles
3
Compatible Contactors
TeSys Easy (18 to 32 Amp Models)
Auxiliary Contact Form
1NO/1NC
Maximum Voltage Rating
690V AC
Phase Loss Sensitivity
Yes
Thermal Units Required
None (Relay Includes Integrated Bimetallic Elements)
Terminal Connection Type
Screw Clamp Terminals
Compatible Contactor Series
Easy TeSys
View Full Spec Sheet

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SCHNEIDER Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SCHNEIDER DPER21 is an IEC thermal overload relay with integrated bimetallic elements, requiring no external thermal units. It features 1NO/1NC auxiliary contacts, a maximum voltage rating of 690V AC, and phase loss sensitivity. Designed for use with TeSys Easy contactors (18 to 32 Amp models), it connects via screw clamp terminals.

Frequently Asked Questions

What is the SCHNEIDER DPER21 overload relay used for?

The SCHNEIDER DPER21 is an IEC thermal overload relay that protects motors from overheating and phase loss. It is used in industrial applications with TeSys Easy contactors (18 to 32 Amp models) to safeguard three-phase motors up to 690V AC.

What are the specifications of the SCHNEIDER DPER21 overload relay?

The SCHNEIDER DPER21 has 3 poles, 1NO/1NC auxiliary contacts, a maximum voltage rating of 690V AC, and phase loss sensitivity. It includes integrated bimetallic elements, so no external thermal units are required. Terminal connection is via screw clamp terminals.

Where to buy the SCHNEIDER DPER21 overload relay worldwide?

3G Electric supplies the SCHNEIDER DPER21 overload relay worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this relay to your facility. Contact us for availability and lead time.

How to install the SCHNEIDER DPER21 overload relay?

Mount the SCHNEIDER DPER21 directly onto a compatible TeSys Easy contactor (18 to 32 Amp models). Connect motor leads to the relay's screw clamp terminals, ensuring phase loss sensitivity is enabled. Follow standard IEC installation practices and verify settings per motor full-load current.

Used in

Common applications for SCHNEIDER
Motor starting in conveyor systems — Schneider Altistart ATS 22 soft starters (e.g., ATS22D17S6U) reduce inrush current.
Speed control for industrial pumps — Schneider Altivar ATV320 VFDs (e.g., ATV320U55N4W) provide variable flow regulation.
Machine safety interlocking — Schneider XPSUAF13AP safety relays monitor emergency stop circuits on assembly lines.
Panel-mounted control stations — Schneider XB5 flush push buttons (ZB5AA5) serve as start/stop operators in MCCs.
Heavy-duty motor switching — Schneider LC1G150LSEA contactors handle 150 A loads in compressor and crusher applications.
Emergency stop actuation — Schneider 9001K mushroom-head push buttons (9001KR25R) provide red, momentary stop functions.

SCHNEIDER Products

3G Electric supplies SCHNEIDER iec thermal overload relays. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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