EM256504VR Terminal Block Plug - Equivalent & Substitute Parts

Part Overview

The EM256504VR is a 4-position terminal block plug manufactured by Eaton Electronics Division, part of the Euro-Mag EM2565 series. This component features female sockets with 0.200" (5.08mm) pitch spacing and 270° free-hanging in-line wire entry configuration. The part is actively produced and maintained in inventory with 775 units currently available in new original condition.

Terminal block plugs serve as critical interconnection components in industrial control systems, power distribution panels, and modular equipment requiring frequent connection and disconnection cycles. Equivalent substitute parts become necessary when the primary part experiences extended lead times, regional supply constraints, or when system design modifications require alternative wire entry orientations or termination methods.

Substiute Parts

EM256504VR

Eaton - Electronics DivisionIn Stock: 847EM256504VR Datasheet

Current PartRFQ

0395333004

MolexIn Stock: 22140395333004 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the EM256504VR is determined by strict adherence to the following critical parameters:

Mandatory Matching Parameters:

• Number of positions: 4
• Pitch spacing: 0.200" (5.08mm)
• Voltage rating (UL): minimum 300 V
• Current rating (UL): minimum 16 A
• Wire gauge accommodation: 12-26 AWG
• Operating temperature range: minimum -40°C ~ 105°C
• Material flammability: UL94 V-0
• RoHS compliance: ROHS3 Compliant

Application-Dependent Parameters (Substitution Possible with Design Review):

• Plug wire entry angle (270° vs. alternative angles)
• Termination method (screw vs. rising cage clamp)
• Contact material composition (brass vs. phosphor bronze)
• Housing material (thermoplastic vs. polyamide)
• Retention latch configuration (non-wire side vs. wire side)

The substitute part 0395333004 (Molex Eurostyle ESE 39533) meets all mandatory parameters but differs in wire entry angle (90° vs. 270°) and termination mechanism. This substitute is electrically and mechanically compatible for applications where the 90° wire entry orientation accommodates the installation geometry.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (EM256504VR): Select the EM256504VR when the installation design specifies 270° wire entry orientation and standard screw termination is required. This part is actively produced by Eaton with 775 units in current inventory. The component carries full ROHS3 compliance and UL94 V-0 flammability certification, meeting all regulatory requirements for industrial control applications.

Substitute Part Selection (0395333004): The Molex 0395333004 serves as an electrical and mechanical substitute when the following conditions are met:

1. Installation geometry accommodates 90° wire entry orientation instead of 270°
2. Rising cage clamp termination method is compatible with the application's assembly procedures
3. Current requirement does not exceed 15 A (note: rated 1 A lower than primary part)
4. Phosphor bronze contact material and polyamide housing material are acceptable for the application environment

The substitute part is actively produced with 2,186 units in current inventory, providing superior availability. Both parts maintain identical pitch spacing (5.08mm), voltage rating (300 V), wire gauge accommodation (12-26 AWG), operating temperature range (-40°C ~ 105°C), and regulatory compliance status (ROHS3, UL94 V-0).

Current Rating Consideration: The EM256504VR is rated for 16 A while the 0395333004 is rated for 15 A. Applications requiring the full 16 A capacity must use the primary part or confirm that actual circuit current does not exceed 15 A.

Frequently Asked Questions (FAQ)

Q: Can the 0395333004 directly replace the EM256504VR in an existing installation?

A: Direct replacement is possible only if the installation geometry accommodates the 90° wire entry angle (substitute) instead of the original 270° configuration. The electrical specifications are compatible, but physical mounting orientation must be verified. If the original installation requires 270° wire entry, physical modification of the mounting structure would be necessary.

Q: What is the significance of the different termination methods (screw vs. rising cage clamp)?

A: The EM256504VR uses standard screw termination requiring a screwdriver for wire insertion and removal. The 0395333004 uses rising cage clamp termination, which provides tool-free wire insertion but requires different assembly procedures. Both methods are mechanically secure; selection depends on assembly workflow and maintenance accessibility requirements.

Q: Does the 1 A difference in current rating (16 A vs. 15 A) affect substitution eligibility?

A: The current rating difference is significant for applications operating near maximum capacity. If the circuit current is confirmed to remain below 15 A, the substitute part is acceptable. For circuits requiring the full 16 A capacity, the EM256504VR must be used. Verify actual circuit current draw before selecting the substitute.

Q: Are the different contact materials (brass vs. phosphor bronze) interchangeable?

A: Both brass and phosphor bronze contacts are tin-plated and suitable for general industrial terminal block applications. Phosphor bronze offers slightly higher spring force and wear resistance. For standard applications, both materials are functionally equivalent. Specialized applications requiring specific contact material properties should specify the original part.

Q: What is the inventory advantage of selecting the substitute part?

A: The 0395333004 has 2,186 units in stock compared to 775 units for the EM256504VR, providing approximately 2.8 times greater availability. This inventory advantage is relevant for high-volume production or when extended lead times are a concern, provided the application design accommodates the 90° wire entry orientation.

Q: Are both parts suitable for the same temperature range applications?

A: Yes. Both the EM256504VR and 0395333004 operate across the identical temperature range of -40°C to 105°C. Temperature performance is not a differentiating factor in substitution decisions.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both parts are ROHS3 compliant and carry UL94 V-0 flammability certification. Regulatory compliance is not a differentiating factor. Both parts are suitable for applications requiring these certifications.