TE Connectivity Erni ERMA 154 M 1 R1 (103975) Equivalent & Substitute Parts

Part Overview

The TE Connectivity Erni ERMA 154 M 1 R1 (Manufacturer Part Number: 103975) is an uncategorized connector component with 154 positions. This part is classified as Obsolete and is no longer in active production. Finding equivalent or substitute parts is necessary to support legacy system maintenance, repair, and component replacement in applications where this connector was originally specified. The availability of 1399 pieces in current inventory represents remaining stock from previous manufacturing runs.

Substiute Parts

103975

TE Connectivity ErniIn Stock: 1417103975 Datasheet

Current PartRFQ

188578-1

TE Connectivity AMP ConnectorsIn Stock: 1155188578-1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TE Connectivity Erni ERMA 154 M 1 R1 is based on the following critical parameters:

Primary Substitution Criteria:

• Number of Positions: 154 positions (matching the original specification)
• Connector Type & Style: Header configuration with male pins
• Pitch: 0.079" (2.00mm) standard spacing
• Mounting Technology: Through-hole or press-fit termination methods
• Electrical Ratings: Voltage and current capacity suitable for backplane applications
• Operating Temperature Range: -55°C to 125°C compatibility
• Contact Material & Finish: Gold plating for reliable signal transmission

The substitute part TE Connectivity AMP Connectors 188578-1 meets these core parameters, providing functional equivalence for legacy ERMA 154 M 1 R1 applications. Both parts share the 154-position configuration and are designed for backplane connector applications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The original ERMA 154 M 1 R1 (103975) is classified as Obsolete. The substitute part 188578-1 maintains Active product status with TE Connectivity AMP Connectors, ensuring ongoing availability and manufacturing support for future procurement needs.

Compliance & Certification:

• Original Part (103975): ECCN classification is Obsolete; RoHS and REACH status not specified
• Substitute Part (188578-1): RoHS non-compliant; REACH Affected; ECCN: EAR99; HTSUS: 8536.69.4040

The substitute part carries defined regulatory classifications suitable for industrial backplane connector applications. Organizations must verify compliance requirements against their specific application standards and regional regulations before implementation.

Inventory & Supply Chain: Both parts maintain current stock availability (1399 pcs original; 1120 pcs substitute). The substitute part's Active status provides long-term supply chain stability compared to the Obsolete original component.

Frequently Asked Questions (FAQ)

Q: What makes the 188578-1 a suitable substitute for the ERMA 154 M 1 R1?

A: Both connectors share the critical 154-position configuration. The 188578-1 is a header-style male pin connector with 0.079" (2.00mm) pitch, designed for backplane applications with through-hole press-fit termination. These specifications align with the functional requirements of the original ERMA 154 M 1 R1 design.

Q: Are there mechanical compatibility concerns when substituting these parts?

A: The substitute part 188578-1 specifies 5 + 2 row configuration with press-fit through-hole mounting. Physical board layout, hole spacing, and mounting clearances must be verified against the original ERMA 154 M 1 R1 design documentation to ensure mechanical fit.

Q: What are the electrical differences between these connectors?

A: The substitute part 188578-1 provides 1.5 A current rating and 500Vrms voltage rating with gold-plated contacts (30.0µin thickness). The original part's electrical specifications are not provided in available documentation. Verify that the substitute's electrical ratings meet or exceed the original application requirements.

Q: Does the substitute part support the same operating temperature range?

A: The 188578-1 operates across -55°C to 125°C, a standard industrial temperature range. Confirm this range matches the original ERMA 154 M 1 R1 application requirements.

Q: What is the significance of the RoHS non-compliant status of the substitute?

A: The 188578-1 is marked RoHS non-compliant and REACH Affected. Organizations operating under RoHS or REACH regulations must evaluate whether this classification impacts their procurement and application requirements.

Q: Are there alternative substitutes listed for the 188578-1?

A: The 188578-1 documentation indicates a cross-reference to 5188578-1. Verify this alternative part number against your specific application requirements and availability.

Q: How should I validate substitution before implementation?

A: Compare the original ERMA 154 M 1 R1 design specifications (mechanical drawings, electrical schematics, and assembly documentation) against the 188578-1 datasheet. Verify pitch, row configuration, contact finish, electrical ratings, and mounting method compatibility with your PCB design and application environment.