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Square D
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$153.37
Square D Motor Logic Solid State Overload Relay, Isolated Alarm Contact
The Square D Motor Logic solid state overload relay isolated alarm contact is designed for use with Motor Logic overload relays that protect 50/60 Hz, 3 phase AC motors from overload, phase unbalance, and phase loss conditions. This isolated alarm contact is configured as 1 normally open (NO) contact and carries a 600 V AC rated operational voltage (Ue), making it well suited for remote alarm signaling in industrial and commercial motor control applications.
Key Features
- Isolated Alarm Contact: 1 normally open (NO) contact configuration for remote signaling of overload conditions.
- Rated Operational Voltage: 600 V AC (Ue) for compatibility with Motor Logic solid state overload relay systems.
- Motor Overload Protection: Supports overload relays protecting 50/60 Hz, 3 phase AC motors from overload, phase unbalance, and phase loss.
- Simple Installation: Designed for straightforward installation onto compatible Motor Logic overload relay assemblies.
- Field-Interchangeable Thermal Units: Compatible overload relays use field interchangeable thermal units for replacement motor installations.
- Flexible Mounting: Available as direct mount or separate mount depending on application requirements.
- Standard Configuration: Comes standard installed on both non-reversing and reversing, as well as combination and multispeed starters.
- Thermal Protection: Helps provide thermal protection for costly connected equipment.
Certifications & Compliance
- RoHS EUR Compliant
- Mercury Free
- Toxic Heavy Metal Free
Technical Specifications
- Toxic Heavy Metal Free: Yes
- Warranty: 18 months
- Take Back: No
- Tier: 1
- Returnability: Yes
- Return Indicator: Y
- Sustainable Packaging: No
- Mercury Free: Yes
- Packaging Without Single Use Plastic: No
- ROHS Eur In Scope: Yes
- Recycled Metal Content At Cr Level: 0 %
- Legacy WEEE Scope: In
- Packaging Made With Recycled Cardboard: Yes
- China ROHS Label: 1
- With Recycled Cardboard: Yes
- Without Single Use Plastic: No
- ROHS Exemption Information: Yes
- Product Or Component Type: auxiliary contact
- China ROHS In Scope: No
Typical Applications
- Industrial and Commercial Motor Control Panels
- Non-Reversing and Reversing Motor Starters
- Combination and Multispeed Starter Assemblies
- Remote Alarm and Signaling Circuits
- Motor Overload Protection Systems
Why Square D?
Square D backs the Motor Logic overload relay line with an 18-month warranty and RoHS-compliant, mercury-free, toxic-heavy-metal-free construction, reflecting a commitment to reliable, code-compliant components for professional motor control installations.
Manufacturer Resources
Product Specs
- Product Type:
- Auxiliary Contact
- Voltage Rating:
- 600V
- Configuration:
- 1 NO
- Standards:
- RoHS Compliant
- Department:
- Electrical
- Product Group:
- Motor Control & Automation
- Product Subgroup:
- Overload Relays
Square D 9999AC04 – Frequently Asked Questions
1) Will the 9999AC04 fit any overload relay, or only Square D Motor Logic?
Only Square D Motor Logic solid state overload relays. It is built to install onto compatible Motor Logic overload relay assemblies, and nothing in its data supports mounting it to other brands or to Square D's thermal-only overload blocks. If you are adding an auxiliary contact to a different manufacturer's device, you need that maker's own accessory, for example the ABB HK1-11 side-mount contact for MS116/132 manual motor protectors or the Eaton XTPAXSA for XT manual motor protectors.
2) Can I run a 480V alarm circuit through this Square D alarm contact?
Yes. The 9999AC04 carries a 600 V AC rated operational voltage, so a 480 V AC signaling circuit is within rating, as is 240 V or 120 V control.
3) I need a normally closed alarm contact for a fail-safe circuit. Is this the right part?
No. The 9999AC04 is configured as a single normally open contact only, so it closes on trip rather than opening. For a fail-safe scheme that drops out on trip you need an NC contact. Among auxiliary contacts from other brands, the ABB HK1-11 is a 1NO/1NC block for MS116/132 motor protectors, which gives you both states, though it mounts to ABB devices and not to a Motor Logic relay.
4) What is the closest alternative to the Square D 9999AC04 if I need two normally open auxiliary contacts instead of one?
The Square D 9999AC04 isolated alarm contact is a single normally open (1 NO) configuration rated 600V AC. If the control scheme needs two NO contacts, the Eaton C320DPG20 auxiliary contact kit is 2NO rated 10A at 600V, and the Eaton ARA20 top deck adder for AR/ARD machine tool relays is also a 2NO configuration. Note that the Eaton parts mount to their own contactor and relay lines rather than to a Motor Logic solid state overload relay, so the rest of the starter has to match.
5) I need a single NO auxiliary contact but my gear is not Square D Motor Logic. What are my options?
The Square D 9999AC04 is a 1 NO isolated alarm contact intended for Motor Logic solid state overload relay assemblies. For a single NO contact on other equipment, the ABB OA1G10 is a 1-NO auxiliary contact switch for ABB OT and OS disconnect switches, and the Eaton XTPAXSA is an auxiliary contact for Eaton XT manual motor protectors. Pick by the host device, since each of these is keyed to its own line.
6) What is the difference between the Square D 9999AC04 and a contactor-mounted auxiliary contact like the Eaton C320KG-SD or ABB CR305X?
The Square D 9999AC04 is an isolated alarm contact that signals an overload condition from a Motor Logic solid state overload relay, which protects 3 phase AC motors against overload, phase unbalance, and phase loss. The Eaton C320KG-SD is a Freedom Series NEMA top-mount auxiliary contact and the ABB CR305X-100B is an auxiliary contact for CR305X series contactors and relays, both of which follow the state of a contactor or relay coil rather than an overload trip. If the signal has to report the overload itself, the 9999AC04 is the part that does it.
7) Do I need to order this alarm contact separately for a new Square D starter?
Often not. The isolated alarm contact comes standard installed on non-reversing and reversing starters as well as combination and multispeed starters using Motor Logic overloads. Order the 9999AC04 on its own when you are retrofitting an existing Motor Logic relay that does not have the alarm contact, or replacing a damaged one.
8) What is the exact part number to order for the Square D Motor Logic isolated alarm contact?
Order Square D part number 9999AC04. That is the 1 NO isolated alarm contact for Motor Logic solid state overload relays, 600 V AC rated.
9) Is the ABB CR460XB2 contact block a substitute for the Square D 9999AC04?
They serve different gear. The ABB CR460XB2 is a 2-pole auxiliary contact block accessory for ABB 460 Line lighting contactors. The Square D 9999AC04 is a 1 NO isolated alarm contact for Motor Logic solid state overload relays used in motor control panels and non-reversing, reversing, combination, and multispeed starters. Lighting contactor work points to the ABB block; motor overload alarm signaling points to the 9999AC04.
10) Which auxiliary contacts are rated for 600V like the Square D 9999AC04?
The Square D 9999AC04 carries a 600V AC rated operational voltage. Among comparable auxiliary contacts, the Eaton C320DPG20 kit is rated 10A at 600V, so both suit control circuits at that class. The mounting differs: the 9999AC04 installs on Motor Logic solid state overload relay assemblies, while the Eaton kit is built for Eaton contactors.
11) Is the Square D Motor Logic alarm contact RoHS compliant and mercury free?
Yes. The 9999AC04 is RoHS (EUR) compliant, mercury free, and free of toxic heavy metals, which is what most institutional and government specs are asking about on panel components. Country of origin is Mexico.
12) Can the Motor Logic overload relay be mounted away from the contactor if my enclosure is tight?
The compatible Motor Logic overload relays are offered as direct mount or separate mount depending on the application, so a separate-mount arrangement is possible when there is no room on the contactor. The relays also use field interchangeable thermal units, which matters if the motor gets swapped for a different FLA later.
How fast can I get the Square D 9999AC04 delivered?
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Square D 9999AC04 come with a warranty?
Absolutely. The Square D 9999AC04 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 9999AC04?
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