Series-783

Supported Applications

The Dwyer Series 783 and Series 784 Ice Cube Relays are full-featured relays designed to handle loads up to 15 amps for AC or DC circuits. The series title identifies specific use cases in HVAC & Pump applications, while the product overview confirms suitability for general switching tasks requiring status indication via a flag indicator and LED lamp.

Operating Conditions & Performance

The relays operate within an ambient temperature range of -40 to 131°F (-40 to 55°C) and can be stored between -40 to 185°F (-40 to 85°C). Electrical ratings are specified as 15 A @ 120 VAC 50/60 Hz; 12 A @ 277 VAC 50/60 Hz or 28 VDC. The operating and load voltage range covers 24-240 VAC; 24 VDC.

Performance metrics include an electrical cycle life of 100,000 cycles and a mechanical cycle life of 10,000,000 cycles. Power consumption is listed as 1.5 VA; 1.4 W for the Series 783 and 1.5 VA; 1.5 W for the Series 784.

Configuration Options

The series supports multiple configurations across two primary model families, distinguished by switching operation and physical dimensions:

• Switching Operation: Available in 3PDT or 4PDT configurations depending on the specific model.
• Housing Material: Plastic polycarbonate construction for both Series 783 and Series 784 units.
• Status Indication: Features a flag status indicator and an LED status lamp to indicate when the relay is activated. A push-to-test button with color coding differentiates between AC and DC actuated models, accompanied by a removable lock-down lever.
• Electrical Connection: Silver alloy plug-in contacts are standard across the series.

The following input voltages and coil resistances are documented in the model chart:

• 24 VAC 50/60 Hz (Series 783: 103 Ω; Series 784: 84.5 Ω)
• 120 VAC 50/60 Hz (Series 783: 2770 Ω; Series 784: 2220 Ω)
• 24 VDC (Series 783: 400 Ω; Series 784: 388 Ω)

Approvals and Compliance: The series carries CE, CSA, cULus, and cURus certifications.

Key Product Differences

The bundle documents two distinct physical form factors within the family manual scope. Series 783 dimensions are listed as width: 1-37/64 [40.00], height: 1-7/32 [30.80], and depth: 1-3/32 [27.90]. Series 784 dimensions differ, with a width of 1-19/32 [40.60], height of 17/64 [6.60], and depth of 1-17/32 [39.10].

Weight varies by series: Series 783 units weigh 2.1 oz (60 g), while Series 784 units weigh 2.8 oz (80 g).

Available Accessories:

• Socket for 784 series relay
• Protection modules, MOV suppressor, 24 VAC/VDC
• Protection modules, MOV suppressor, 120 VAC/VDC
• Protection modules, protection diode, 6 to 250 VDC