Schneider Electric ZBE203 Double Contact Block

Technical Overview

Harmony double contact block with 2 NO slow-break silver alloy contacts. Rated 600V, IP20 protected with screw clamp terminals and 10M mechanical cycles.

Key Features

Double contact block with 2 Normally Open (NO) contacts
Designed for Harmony XB4 and XB5 series Ø22 mm control units
High-quality silver alloy (Ag/Ni) contacts for standard applications
Screw clamp terminal connections compatible with wires up to 1.5 mm²
Exceptionally high mechanical durability of up to 10,000,000 operating cycles
IP20 protection rating conforming to IEC 60529
Slow-break contact operation with a total operating travel of 4.3 mm
Built to withstand temperatures from -40°C to 70°C for demanding environments

Technical Specification Matrix

Parameter	Value
Contact Configuration	2 NO
Contact Operation	Slow-break
IP Protection Rating	IP20 conforming to IEC 60529
Rated Insulation Voltage (Ui)	600 V conforming to IEC 60947-1
Rated Impulse Withstand Voltage (Uimp)	6 kV conforming to IEC 60947-1
Conventional Free Air Thermal Current (Ith)	10 A conforming to IEC 60947-5-1
Mechanical Durability	10,000,000 cycles
Terminal Connection Type	Screw clamp terminals
Contact Material	Silver alloy (Ag/Ni)
Operating Temperature Range	-40 to 70 °C
Physical Weight (kg)	0.02
Dimensions L x W x H (cm)	3.2 x 1 x 4.72

Industrial Applications

1. Industrial Control Panel Start Pushbutton

Using the ZBE203 double contact block to provide reliable start signal switching for dual-redundant safety PLC inputs or auxiliary control relays. The 2 Normally Open (NO) contacts allow the same physical pushbutton press to simultaneously trigger two separate signal pathways.

Problem Solved

Ensures reliable, simultaneous signaling to independent PLC control loops without requiring separate relays, taking advantage of the high 10 million mechanical cycles durability to reduce maintenance downtime.

Harmony XB42 NODual Signal PathControl PanelSlow-break

2. Harsh Environment Heavy Machinery Enclosures

Installing the ZBE203 block into industrial control consoles exposed to extreme temperature variations. With its operating temperature rating of -40°C to 70°C and a robust silver alloy contact design, it operates reliably in outdoor equipment like cranes or mining control stations.

Problem Solved

Prevents contact oxidation and terminal failures caused by extreme temperature fluctuations and environmental vibration, ensuring long-term contact integrity.

Silver Alloy ContactsWide Temperature Range-40°C to 70°CIndustrial Console

3. Multi-Circuit Selector Switch Coordination

Utilizing the ZBE203 double contact block mounted on a Harmony selector switch body to concurrently activate two distinct pilot indicators or main contactor coils (operating at 120V AC / 6A or 240V AC / 3A) upon rotary switch actuation.

Problem Solved

Eliminates the need for external secondary relay routing by directly handling dual load switching of up to 6A at 120V AC, simplifying the overall panel wiring architecture and reducing space requirements.

Screw Clamp TerminalsDouble Contact BlockAC-15 UtilizationSelector Switch600V Rated