EM35MR-4PC Equivalent & Substitute Parts

Part Overview

The EM35MR-4PC is a 4-position rectangular connector housing from Hirose Electric's EnerBee™ EM series, designed for DIN rail mounting applications. This receptacle housing accommodates male pin contacts with crimp termination and is constructed from polybutylene terephthalate (PBT) for durability across industrial temperature ranges. The product is currently classified as obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations where legacy compatibility is required.

Substiute Parts

EM35MR-4PC

Hirose Electric Co LtdIn Stock: 967EM35MR-4PC Datasheet

Current PartRFQ

EM35MR-4PC(81)

Hirose Electric Co LtdIn Stock: 1170EM35MR-4PC(81) Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the EM35MR-4PC is determined by the following critical parameters:

• Connector Type & Contact Type: Both main and substitute parts must be receptacles with male pin contacts to ensure mating compatibility with existing plug assemblies
• Number of Positions: Both parts maintain 4-position configuration for circuit continuity
• Mounting Type: DIN rail mounting is preserved across all alternatives
• Contact Termination & Fastening: Crimp termination with latch holder fastening ensures mechanical and electrical consistency
• Material & Temperature Rating: PBT insulation and -40°C to 125°C operating range maintain environmental performance specifications
• Manufacturer & Series: Both parts originate from Hirose Electric's EnerBee™ EM series, ensuring design compatibility

The primary distinction between the main part and its substitute relates to row configuration and product status. The substitute part EM35MR-4PC(81) maintains functional equivalence while offering active product status and updated compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The EM35MR-4PC-81 serves as the active product equivalent for the obsolete EM35MR-4PC. Selection between these parts should be based on the following criteria:

For Legacy System Maintenance: The EM35MR-4PC remains suitable where existing inventory is available and system specifications explicitly require the 4-row configuration. However, long-term availability is constrained due to obsolete status.

For New Designs and Replenishment: The EM35MR-4PC(81) is the recommended selection. It maintains electrical and mechanical compatibility with the original part while offering active product status, ensuring continued availability and supply chain reliability. The upgrade to ROHS3 compliance provides enhanced environmental and regulatory alignment compared to the base RoHS Compliant status of the original part.

Row Configuration Consideration: The transition from 4 rows to 2 rows in the substitute part represents a physical layout change. This difference must be evaluated against specific mechanical mounting and spatial constraints in the target application.

Compliance & Certifications: Both parts maintain identical operating temperature ranges, moisture sensitivity levels, and core material specifications. The substitute part's ROHS3 certification represents an advancement in regulatory compliance without compromising functional performance.

Frequently Asked Questions (FAQ)

Q: Can EM35MR-4PC(81) directly replace EM35MR-4PC in existing assemblies?

A: Electrical and functional compatibility is maintained. Both parts are 4-position receptacles with male pin contacts, crimp termination, and DIN rail mounting. The row configuration differs (4 rows vs. 2 rows), which may affect physical mounting geometry. Mechanical fit must be verified against the specific application's spatial requirements and PCB layout.

Q: What is the significance of the row configuration change from 4 to 2?

A: Row configuration determines the physical arrangement of contact positions within the housing. The 4-row configuration of the original part arranges all 4 positions in a single vertical column, while the 2-row configuration distributes positions across two rows. This affects the connector's footprint and mounting interface. Applications with strict spatial or mechanical constraints must account for this difference.

Q: Are there differences in contact capacity or electrical performance?

A: Both parts maintain identical contact type (male pin), termination method (crimp), and fastening mechanism (latch holder). The number of positions remains 4 in both cases. No electrical performance degradation occurs with the substitute part.

Q: What does the packaging difference mean for procurement?

A: The original EM35MR-4PC packaging is not specified, while EM35MR-4PC(81) is supplied in bag packaging. This affects handling, storage, and inventory management but does not impact the component's functional or electrical characteristics.

Q: Why is the original part classified as obsolete?

A: Obsolete status indicates that Hirose Electric has discontinued active production and support for the EM35MR-4PC. The EM35MR-4PC(81) represents the active product line continuation within the EnerBee™ EM series, ensuring ongoing availability and manufacturer support.

Q: Are there any compliance or certification advantages to using the substitute part?

A: The EM35MR-4PC(81) carries ROHS3 compliance, representing an updated regulatory certification compared to the base RoHS Compliant status of the original part. Both maintain identical operating temperature ranges (-40°C to 125°C) and moisture sensitivity levels (MSL 1). The upgrade provides enhanced alignment with current environmental and regulatory standards.