UE23-2MF2D3 Equivalent & Substitute Parts

Part Overview

The UE23-2MF2D3 is a safety relay manufactured by SICK, Inc., configured as a 3PST (3-pole single-throw) unit with 6A contact rating and 24VDC coil voltage. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for system maintenance and new design implementations. The relay features screw terminal connections and operates on DIN rail mounting systems, with contact materials composed of silver and gold for enhanced reliability in safety-critical applications.

Substiute Parts

UE23-2MF2D3

SICK, Inc.In Stock: 1053UE23-2MF2D3 Datasheet

Current PartRFQ

RLY3-EMSS1

SICK, Inc.In Stock: 958RLY3-EMSS1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UE23-2MF2D3 is based on alignment of the following critical parameters:

• Coil Voltage: 24VDC (primary control signal requirement)
• Contact Rating: 6 A (load-carrying capacity)
• Mounting Type: DIN Rail (physical installation compatibility)
• Contact Material: Silver/Gold composition (reliability and conductivity)
• Manufacturer: SICK, Inc. (design continuity and support)

The identified substitute part RLY3-EMSS1 maintains compatibility across coil voltage, current rating, mounting type, and contact material specifications. However, differences exist in contact form configuration (DPST-NO versus 3PST-2NO/1NC), termination style (Spring Terminal versus Screw Terminal), and switching voltage maximum (250VDC versus 300VDC). These differences must be evaluated within the context of the specific application circuit.

Parameter Comparison

Engineering Selection Recommendations

The RLY3-EMSS1 is an active product from SICK, Inc., providing supply continuity for applications currently using the obsolete UE23-2MF2D3. Both components share identical coil voltage (24VDC), contact current rating (6 A), mounting configuration (DIN Rail), and contact material composition (Silver/Gold).

Selection of RLY3-EMSS1 as a substitute requires circuit-level evaluation of the following factors:

• Contact Form Difference: The main part provides 3PST configuration (2 normally-open, 1 normally-closed contact), while the substitute provides DPST configuration (2 normally-open contacts only). Applications requiring normally-closed contact functionality must implement alternative circuit design.

• Termination Compatibility: The main part uses screw terminals; the substitute uses spring terminals. Installation procedures and wiring practices must be adapted accordingly.

• Switching Voltage: The main part supports 300VDC maximum switching voltage; the substitute supports 250VDC maximum. Applications operating at voltages between 250VDC and 300VDC are not compatible with the substitute.

• Response Time: The substitute exhibits significantly faster operate time (10 ms versus 80 ms), which may affect circuit timing in applications dependent on the original relay's response characteristics.

Both components maintain EAR99 export classification and HTSUS code 8536.41.0020 compliance.

Frequently Asked Questions (FAQ)

Q: Can RLY3-EMSS1 directly replace UE23-2MF2D3 in existing installations?

A: Direct replacement is possible only if the application circuit does not require the normally-closed contact provided by the main part's 3PST configuration, does not operate at switching voltages exceeding 250VDC, and can accommodate spring terminal connections. The faster operate time of the substitute (10 ms versus 80 ms) must be verified as compatible with circuit timing requirements.

Q: What is the primary difference between these two relay models?

A: The main difference is contact form configuration. The UE23-2MF2D3 provides 3PST-2NO/1NC (two normally-open and one normally-closed contact), while the RLY3-EMSS1 provides DPST-NO (two normally-open contacts only). This affects circuit design and control logic implementation.

Q: Are both relays suitable for safety-critical applications?

A: Both components are manufactured by SICK, Inc., and share identical contact material composition (Silver/Gold). However, application suitability depends on specific safety requirements, certification standards, and circuit design. Consult application-specific safety documentation.

Q: What packaging options are available?

A: The UE23-2MF2D3 is supplied in standard packaging with 1041 units in current inventory. The RLY3-EMSS1 is supplied in bulk packaging with 946 units in current inventory.

Q: Does the substitute meet RoHS compliance requirements?

A: The RLY3-EMSS1 is RoHS3 compliant and REACH unaffected. Compliance status for the obsolete UE23-2MF2D3 is not specified in available documentation.