UE10-4XT3D2 Equivalent & Substitute Parts

Part Overview

The UE10-4XT3D2 is a safety relay manufactured by SICK, Inc., configured as a 7PST (7-pole single-throw) device with 4 normally open and 3 normally closed contacts. Rated for 6A at 24VAC/DC coil voltage, this relay is designed for DIN Rail mounting with screw terminal connections. The product is currently obsolete, necessitating identification of functionally equivalent alternatives to maintain system continuity and support ongoing maintenance requirements.

Substiute Parts

UE10-4XT3D2

SICK, Inc.In Stock: 798UE10-4XT3D2 Datasheet

Current PartRFQ

RLY3-0SSD400

SICK, Inc.In Stock: 788RLY3-0SSD400 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UE10-4XT3D2 is constrained by the following critical parameters:

Contact Configuration: The original part provides 7PST with mixed contact forms (4NO/3NC). Substitute parts must provide equivalent contact pole count and form distribution to maintain circuit functionality.

Coil Voltage: The 24VAC/DC specification requires substitutes to accept both AC and DC supply voltages at 24V nominal.

Current Rating: The 6A contact rating establishes the minimum switching capacity requirement.

Mounting and Termination: DIN Rail mounting with screw terminals defines the physical and electrical interface constraints.

Switching Voltage: Maximum switching voltage of 230VAC and 300VDC establishes the upper voltage limit for controlled circuits.

The RLY3-0SSD400 is identified as a manufacturer-recommended substitute. However, this part exhibits significant parameter deviations that require engineering evaluation for compatibility.

Parameter Comparison

Engineering Selection Recommendations

The RLY3-0SSD400 is designated as the manufacturer-recommended substitute and carries Active product status, ensuring ongoing availability and support. The substitute meets current RoHS3 compliance requirements, providing environmental regulatory alignment.

Direct substitution requires evaluation of the following deviations:

Coil Voltage Limitation: The substitute operates on 24VDC only, eliminating AC supply compatibility. Applications requiring 24VAC operation cannot use this substitute without supply modification.

Contact Configuration Reduction: The substitute provides 4PST-NO (4 normally open contacts only), compared to the original 7PST-4NO/3NC configuration. Applications requiring normally closed contacts or the full 7-pole configuration cannot be accommodated by this substitute.

Switching Voltage Reduction: Maximum VDC switching voltage is reduced from 300V to 230V. Applications switching voltages above 230VDC require alternative evaluation.

Termination Interface Change: Screw terminal to spring terminal conversion requires mechanical and electrical interface adaptation during installation.

Operating Speed Increase: The 12ms operate time represents a 5.8x improvement over the original 70ms specification. Applications with timing-critical functions must validate compatibility with faster response characteristics.

Substitution is viable only for applications meeting all of the following conditions: 24VDC supply availability, requirement for 4 or fewer normally open contacts only, maximum switching voltage not exceeding 230VDC, and compatibility with spring terminal connections and faster relay response time.

Frequently Asked Questions (FAQ)

Q: Can the RLY3-0SSD400 replace the UE10-4XT3D2 in all applications?

A: No. The substitute has reduced contact configuration (4NO vs. 7PST-4NO/3NC), operates on 24VDC only (not 24VAC), and uses spring terminals instead of screw terminals. Substitution is valid only when the application requires 4 or fewer normally open contacts, operates on DC supply, and can accommodate spring terminal connections.

Q: What happens if my circuit requires normally closed contacts?

A: The RLY3-0SSD400 provides only normally open contacts. Applications requiring normally closed contacts cannot use this substitute. Alternative parts with mixed contact forms must be evaluated.

Q: Is the faster operate time (12ms vs. 70ms) a problem?

A: The faster response may be beneficial for most applications but must be validated for timing-critical circuits. If the original 70ms delay is functionally required, the faster substitute may cause unintended behavior.

Q: Can I use the RLY3-0SSD400 with 24VAC supply?

A: No. The substitute is rated for 24VDC only. AC supply operation is not supported. The power supply must be modified to provide DC voltage.

Q: What is the difference between screw and spring terminals?

A: Screw terminals use a mechanical fastener to secure wires; spring terminals use spring-loaded contacts. Spring terminals typically provide faster installation but may require different wire preparation and connection verification procedures.

Q: Are both parts RoHS compliant?

A: The original UE10-4XT3D2 RoHS status is not specified in available documentation. The RLY3-0SSD400 is ROHS3 compliant, meeting current environmental regulations.

Q: What is the maximum switching voltage for each part?

A: The UE10-4XT3D2 switches up to 230VAC and 300VDC. The RLY3-0SSD400 switches up to 230VAC and 230VDC. Applications requiring switching above 230VDC cannot use the substitute.