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Square D 389F SE Series DPDT Power Relay, 24 VDC Coil, Plug-In Socket Mount
The Square D 389F SE Series power relay is a DPDT plug-in power relay engineered for high-power switching applications in industrial and commercial control panels. Available with a Motor FLA contact rating spanning 20A to 25A at 300VAC, this relay holds motor loads up to 1.5hp at 200/240V AC 50/60Hz, with a nominal coil voltage of 24 VDC and a maximum switching voltage of 600V AC. The plug-in socket mount design allows for fast installation and maintenance-free replacement, making the 389F series a dependable choice for machine control and OEM equipment where reliable, high-current switching is required.
Key Features
- Configuration: DPDT contact arrangement for flexible multi-circuit switching.
- Coil Voltage: 24 VDC nominal input voltage with an operating voltage range of 0.8...1.1 Uc DC.
- Motor FLA / Contact Rating: Available from 20A to 25A at 300VAC (UL/CSA rated operational current), suitable for high-power switching loads.
- Motor Load Capability: Holds motor loads up to 1.5hp at 200/240V AC 50/60Hz, 1hp at 120...200V AC, and 1hp at 600V AC.
- Maximum Switching Voltage: 600V AC for demanding power-switching circuits.
- Mounting & Termination: Plug-in socket mounting with quick-connect terminals for fast field installation.
- Durability: Rated for 5,000,000 cycles mechanical durability and up to 100,000 cycles resistive electrical load durability.
- Dielectric Strength: 1600V AC between contacts and 2200V AC between coil and contact for reliable isolation.
Certifications & Compliance
- CSA Certified
- cURus Listed
- CE Marked
Technical Specifications
- Voltage Rating: 24VDC
- Amperage Rating: 20A
- Connections/Terminals: Quick
- Mounting Support: Socket
- Short Circuit Current: 3 kA
- Wire Stripping Length: 8 mm
- Ambient Air Temperature for Storage: -30 to 85 °C
- Average Impedance: 4 mOhm
- Country of Origin: China
- Sustainable Packaging: Yes
- Packaging Without Single Use Plastic: Yes
- Reach Free of SVHC: Yes
- ROHS Eur Full Compliance Status: Pro-active compliance (Product out of EU RoHS legal scope)
Typical Applications
- Industrial and Commercial Control Panels
- OEM Machine Control Circuits
- Motor Load Switching up to 1.5hp
- High-Power Switching Applications
- Panel Building and System Integration
Why Square D?
Square D SE Relays deliver high contact ratings across the Motor FLA range and long electrical endurance backed by CSA, cURus, and CE certifications, making the 389F series a dependable choice for high-power switching in control panels and OEM equipment. The plug-in socket design and quick-connect terminals simplify installation and replacement, while durable construction rated for millions of mechanical cycles supports long-term, code-compliant performance for professional electrical work.
Manufacturer Resources
Product Specs
- Product Type:
- Control Relay
- Configuration:
- DPDT
- Voltage Rating:
- 24VDC
- Amperage Rating:
- 20A-25A
- Connection Type:
- Quick Connect
- Listing:
- cURus
- Department:
- Electrical
- Product Group:
- Motor Control & Automation
- Mounting Support:
- Socket
- Product Subgroup:
- Contactors & Relays
Square D 389FXCXC-120A – Frequently Asked Questions
1) Will the Square D 389F relay switch a 1.5 hp motor at 240V?
Yes. The 389F SE Series DPDT relay holds motor loads up to 1.5hp at 200/240V AC 50/60Hz, 1hp at 120...200V AC, and 1hp at 600V AC. Maximum switching voltage is 600V AC, so it covers typical 208/240 and 480/600V control panel work within those horsepower limits.
2) Does the Square D 389F relay need a socket, or does it mount directly to DIN rail?
It is a plug-in relay and requires a socket. Mounting support is socket only, with quick-connect terminals taking an 8 mm wire strip length. Order a matching socket base with it if the panel does not already have one, since the relay body has no direct rail or panel mounting of its own.
3) Can I drive this Square D relay from a 24VAC control circuit?
No. The 389F version described here uses a 24 VDC nominal coil with an operating range of 0.8 to 1.1 Uc DC. A 24VAC control transformer will not operate it correctly. You need a DC control supply, or a relay built with an AC coil.
4) Is the Square D 389F relay UL listed for use in a control panel?
It carries cURus listing, is CSA Certified, and is CE marked. The 20A-25A contact ratings at 300VAC are the UL/CSA rated operational currents, and short circuit current rating is 3 kA.
5) How long will a Square D 389F power relay last in a cycling application?
Mechanical durability is rated at 5,000,000 cycles, and electrical durability on a resistive load is up to 100,000 cycles. Inductive motor loads will shorten the contact life relative to that resistive figure, so size the relay toward the 25A version if it is cycling hard.
6) Is a standard ice cube relay enough, or do I need a power relay like the 389F?
Depends on the load. A general purpose plug-in such as the Eaton D1RF1 Series SPDT ice cube relay is 15A and single pole double throw, fine for pilot duty and light switching. The Square D 389F is a DPDT power relay rated 20A to 25A Motor FLA at 300VAC and good for motor loads to 1.5hp, which is where an ice cube relay stops being appropriate.
7) My circuit is 600V - does the Square D 389F cover it or do I need a different relay?
The Square D 389F SE Series carries a maximum switching voltage of 600V AC and holds 1hp at 600V AC, so it is rated for that class of circuit. If you need a multi-pole relay at that voltage instead of a two-pole, the Eaton D15 series is a 600V multi-pole malleable control relay. The 389F remains the DPDT, plug-in socket option with a 24VDC coil.
8) What is the isolation rating between the coil and contacts on this Square D power relay?
Dielectric strength is 2200V AC between coil and contact, and 1600V AC between contacts. That is the figure to check when you are switching a 600V AC load from a low-voltage 24 VDC control circuit in the same enclosure.
9) Does the Square D 389F relay meet sustainable procurement requirements?
For buyers with green purchasing criteria: the 389F ships in sustainable packaging with no single use plastic, is REACH free of SVHC, and is listed as pro-active RoHS compliant (the product sits outside EU RoHS legal scope). Country of origin is China.
10) What storage temperature can the Square D 389F relay handle before installation?
Ambient air temperature for storage is -30 to 85 degrees C, so an unheated warehouse or a service van in winter is not a problem for stocked spares.
How fast can I get the Square D 389FXCXC-120A delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
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Does the Square D 389FXCXC-120A come with a warranty?
Absolutely. The Square D 389FXCXC-120A is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Square D 389FXCXC-120A?
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