Square D Type S Melting Alloy ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$20.23
Square D Type S Melting Alloy Overload Relay Jumper Strap Kit

Square D Type S Melting Alloy Overload Relay Jumper Strap Kit

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Model: 9998SO31

In Stock (leaves warehouse same day if ordered before 3pm ET)

$20.23
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Square D Type S Melting Alloy Overload Relay Jumper Strap Kit

The Square D Type S melting alloy overload relay jumper strap kit is used on three-phase manual and magnetic starters equipped with melting alloy overload relays, allowing a three-phase starter to control a single-phase motor. The kit includes two jumper straps and a wiring diagram showing correct hookup, and is rated for 600 V AC operational voltage (Ue). It is compatible with Square D actuators 2510KG1A, 2510KO2, 2510KW6, and 2510KW2CH.

Key Features

  • Kit Contents: Includes two jumper straps and a wiring diagram for correct installation on melting alloy overload relays.
  • Application: Enables a three-phase manual or magnetic starter with a melting alloy overload relay to control a single-phase motor.
  • Operational Voltage: Rated 600 V AC (Ue) for compatibility with Square D starter platforms.
  • Actuator Compatibility: Fits Square D actuators 2510KG1A, 2510KO2, 2510KW6, and 2510KW2CH.
  • Standard Installation: Comes standard installed on non-reversing and reversing, combination, and multispeed starters.
  • Mounting Flexibility: Available as direct mount or separate mount depending on the starter configuration.
  • Field Interchangeable: Thermal units are field interchangeable, supporting replacement motor installations.
  • Simple Installation: Straightforward installation and thermal protection for critical motor equipment.

Technical Specifications

  • Warranty: 18 months
  • Take Back: No
  • Tier: 1
  • Returnability: Yes
  • Warranty Period: 18 months
  • Return Indicator: Y
  • Sustainable Packaging: No
  • Packaging Without Single Use Plastic: No
  • Tier Id: 1
  • ROHS Eur In Scope: Yes
  • Recycled Metal Content At Cr Level: 0 %
  • Legacy WEEE Scope: In
  • Packaging Made With Recycled Cardboard: Yes
  • With Recycled Cardboard: Yes
  • Without Single Use Plastic: No
  • China ROHS In Scope: No
  • WEEE Product Category: 5
  • Product Contributes To Saved And Avoided Emissions: No

Typical Applications

  • Three-Phase Manual and Magnetic Motor Starters
  • Single-Phase Motor Control Through Three-Phase Starters
  • Combination and Multispeed Starter Configurations
  • Replacement Motor and Thermal Unit Installations
  • Industrial and Commercial Motor Control Panels

Why Square D?

Square D backs this jumper strap kit with an 18-month warranty and field interchangeable thermal units, making it easy for electricians and panel builders to service melting alloy overload relays without full assembly replacement. Built for direct or separate mount use on non-reversing, reversing, combination, and multispeed starters, it provides dependable thermal protection for motor control equipment in industrial and commercial installations.

Manufacturer Resources

Product Specs

Product Type:
Overload Relay Accessory
Series:
Type S
Voltage Rating:
600V
Department:
Electrical
Product Group:
Motor Control & Automation
Product Subgroup:
Overload Relays
Product Height:
1.87 in
Product Width:
0.92 in
Product Depth:
0.12 in

Square D 9998SO31 – Frequently Asked Questions

1) Can an Eaton XT overload relay adapter be used instead of the Square D 9998SO31 jumper strap kit to run a single-phase motor off a three-phase starter?
No. The Square D Type S 9998SO31 kit supplies two jumper straps and a wiring diagram that let a three-phase manual or magnetic starter with a melting alloy overload relay control a single-phase motor, and it is rated 600 V AC. The Eaton XTOBXDIN is a mounting adapter for an XT series IEC bimetallic overload relay on a C or D frame - it changes how the relay mounts, not how the motor phases are wired. The two solve different problems and are not interchangeable.
2) Is this jumper strap kit rated for a 600 volt motor control panel?
Rated 600 V AC operational voltage (Ue), which covers standard 480 V and 600 V three-phase control panel work as well as lower-voltage single-phase loads.
3) Does the kit work on reversing and multispeed starters, or only basic non-reversing ones?
It applies across non-reversing and reversing, combination, and multispeed starters, and it is available for both direct mount and separate mount overload relay configurations depending on how your starter is built.
4) Do I still need to change the heater elements when I convert a starter to single-phase?
The jumper straps handle the phase conversion wiring only. Thermal units on these melting alloy overload relays are field interchangeable, so sizing the heaters to the replacement motor's full load current is a separate order and a separate step.
5) What comes in the Square D 9998SO31 kit, and what do I have to supply myself?
Two jumper straps and a wiring diagram showing correct hookup. Everything else, including any replacement thermal units for the motor you are installing, is ordered separately.
6) My starter uses a bimetallic IEC overload relay, not a melting alloy unit - does the Square D 9998SO31 still apply?
No. The 9998SO31 straps are intended for melting alloy overload relays on Square D Type S three-phase manual and magnetic starters, and are listed as compatible with Square D actuators 2510KG1A, 2510KO2, 2510KW6, and 2510KW2CH. For an IEC bimetallic overload relay platform, the accessories are built around that relay family instead - Eaton's XT line, for example, uses the XTOBXDIN adapter for C and D frame mounting.
7) Is the Eaton overload reset bar accessory an alternative to the Square D 9998SO31?
They are not alternatives. The Eaton ZEB-XRB is a reset bar accessory for C440 and XTOE overload relays, used to extend or remote the reset actuation. The Square D 9998SO31 is a jumper strap kit for melting alloy overload relays on Type S starters, used to adapt a three-phase starter to a single-phase motor. If you need remote reset actuation, the reset bar is the part to look at; if you need the phase jumpering, the Square D kit is.
8) How much room does the Square D 9998SO31 strap take up inside the enclosure?
Each piece is thin, measuring 1.87 x 0.92 x 0.12 inches, so it adds essentially no depth inside the starter enclosure. The straps land on the overload relay terminals rather than needing their own mounting space.
9) Where is the Square D 9998SO31 jumper strap kit made?
Country of origin is Mexico, which matters if your project carries domestic sourcing or country-of-origin documentation requirements.
How fast can I get the Square D 9998SO31 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
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 9998SO31 come with a warranty?
Absolutely. The Square D 9998SO31 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 9998SO31?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Square D 9998SO31 from ZenSupply?
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