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HomeProducts Power Switching Watlow Solid State Power Controllers Watlow CZR Solid State Relay Watlow Series CZR Solid State Relay

Watlow Series CZR Solid State Relay

up to 42 amps
Watlow Series CZR Solid State Relay
The SERIES CZR solid state relay from Watlow® provides a low-cost, highly compact and versatile solid state option
for controlling electric heat. With DIN-rail and back panel mounting standard on every controller, the CZR allows for simple and quick installation.

The extensive capabilities of the SERIES CZR include single-phase, 18 to 42 ampere zero-cross switching up to 600VAC (see output rating curve). The unique integrated design removes the guesswork associated with selecting a proper heat sink and precise terminations for the application.

This controller holds many agency approvals and is ideal for applications that require UL®, CSA and CE approvals. The SERIES CZR is available in VAC/VDC input contactor versions. All configurations are model number dependent and factory selectable. SERIES CZR is reliably backed by a two-year warranty from Watlow


Watlow: Your Heat Solutions Resource Brochure (EN)
Watlow: Vos Solutions de Chauffage Brochure (FR)
Back to Watlow CZR Solid State Relay
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Features
Specifications
Ordering information
Resources
Applications

Product Features

DIN-rail or standard panel mount
  • Provides versatile, quick and low-cost installation
Compact size
  • Reduces panel space and cost
Touch-safe terminals
  •  Increases installer and operator safety
Mercury free
  • Offers environmentally safe solution
Faster switching with solid state
  • Saves energy and extends heater life
UL® 508 recognized, CSA LR700195 certified and CE 60950
  • Assures safety
Back-to-back SCR design
  • Offers rugged design for different application environments

Product Specifications

Control Mode:
Zero-cross fired contactor output
Operator Interface:
  • Command signal input
  • Input signal indication LED
Input Command Signal:
  • Input Type DC1
  • Turn on voltage 4VDC max., turn off voltage 1VDC min.
  • Input current: dc typically 10mA @ 4VDC,13mA @ 32VDC
  • Input Type AC1
  • 90 to 140Vrms, must turn on at 90VAC, must turn off at 10VAC
  • Input current: 15mA typical @ 120VAC
Output Voltage:
  • 24; 24VAC min. to 280VAC max.
  • 48; 48VAC min. to 530VAC max.
  • Off state leakage 10mA at 77°F (25°C) max.
  • Holding current: 250mA max.
Agency Approvals:
  • Class II construction
  • UL® 508 recognition, File #E73741 and CSA File LR 700195
  • 206/95/EC CE Low Voltage Directive
Output Terminals:
  • Compression type
  • For 18A models:
  • Max. wire size 3.0 mm (10 AWG), torque to 0.6Nm (5.3 in. lbs)
  • For 24 to 42A models:
  • Max. wire size 16 mm (6 AWG stranded) torque to 1.5-1.7Nm (13-15 in. lbs)
Operating Environment:
  • Up to 176°F (80°C). See output rating curves for your application.
  • 0 to 90% RH (relative humidity), non-condensing
  • Insulation tested to 3,000 meters
  • Units are suitable for “pollution degree 2”
  • Cycle time should be less than 3 seconds
Mounting:
  • Options include DIN-rail or standard back panel mounting.
  • The DIN-rail specification: DIN EN 50022, 1.38 in. x 0.30 in. (35 mm x 7.5 mm)
  • Min. clipping distance: 1.37 in. (34.8 mm)
  • Max. clipping distance: 1.39 in. (35.3 mm)
  • Mount cooling fins vertical
Weight/Dimensions:
  • 9.2 oz (260g)
  • 24 to 42A models: 3.95 in. (100 mm) high x 1.75 in. (45 mm) wide x 4.3 in. (109 mm) deep
  • 18A models: 3.95 in. (100 mm) high x 0.89 in. (22.6 mm) wide x 3.9 in. (99 mm) deep

Ordering information