IL-Z-12S-S125C3 Equivalent & Substitute Parts

Part Overview

The IL-Z-12S-S125C3 is a 12-position rectangular connector receptacle housing manufactured by JAE Electronics, designed for 0.049" (1.25mm) pitch applications with crimp contact termination and friction lock fastening. This part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity. The connector accommodates female socket contacts in a single-row, free-hanging in-line configuration suitable for applications requiring compact interconnect solutions.

Substiute Parts

IL-Z-12S-S125C3

JAE ElectronicsIn Stock: 748IL-Z-12S-S125C3 Datasheet

Current PartRFQ

0510211200

MolexIn Stock: 784900510211200 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IL-Z-12S-S125C3 is determined by strict alignment of the following critical parameters:

• Connector Type & Contact Configuration: Receptacle housing with female socket contacts
• Position Count & Pitch: 12 positions at 0.049" (1.25mm) spacing
• Mechanical Interface: Single-row, free-hanging in-line mounting with crimp termination and friction lock fastening
• Environmental Compliance: Moisture sensitivity level and operating temperature range

The Molex 0510211200 (PicoBlade 51021 series) satisfies all mandatory substitution criteria. Both parts share identical connector type, position count, pitch, row configuration, mounting style, termination method, and fastening mechanism. Both are rated MSL 1 (Unlimited moisture sensitivity). The substitute part operates across an extended temperature range (-40°C ~ 105°C) compared to the original part (-40°C ~ 70°C), providing enhanced thermal capability. Material composition differs (PBTP vs. PA66), but both are standard insulation materials for this connector class and do not restrict functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The Molex 0510211200 is the direct functional equivalent for the obsolete IL-Z-12S-S125C3. Selection of the substitute part is supported by:

• Product Status: The substitute is active and in production, ensuring long-term availability and supply chain stability.
• Regulatory Compliance: The Molex part carries ROHS3 compliance and REACH unaffected status, meeting current environmental regulations.
• Thermal Enhancement: The extended operating temperature range (-40°C ~ 105°C) provides additional margin beyond the original specification (-40°C ~ 70°C).
• Mechanical Compatibility: All critical mechanical and electrical parameters align with the original part, enabling direct substitution without design modification.

For applications where the original IL-Z-12S-S125C3 was specified, the 0510211200 serves as a direct replacement without functional compromise.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0510211200 be used as a direct replacement for the IL-Z-12S-S125C3?

A: Yes. Both parts are 12-position receptacle housings with 0.049" (1.25mm) pitch, single-row configuration, crimp termination, and friction lock fastening. All critical mechanical and electrical parameters are identical, enabling direct substitution.

Q: What is the significance of the different insulation materials (PA66 vs. PBTP)?

A: Both polyamide (PA66) and polybutylene terephthalate (PBTP) are standard insulation materials for rectangular connectors in this class. The material difference does not affect functional compatibility or performance in equivalent applications.

Q: Does the extended operating temperature range of the Molex part affect compatibility?

A: No. The Molex 0510211200 operates from -40°C ~ 105°C, which encompasses the original part's range of -40°C ~ 70°C. The extended range provides additional thermal margin and does not introduce compatibility issues.

Q: Are there any compliance differences between the two parts?

A: The Molex 0510211200 carries ROHS3 compliance and REACH unaffected status. The original part's compliance status is not specified in available documentation. For applications requiring regulatory compliance, the Molex part meets current environmental standards.

Q: What is the packaging difference between these parts?

A: The IL-Z-12S-S125C3 packaging is not specified. The Molex 0510211200 is supplied in bulk packaging. Confirm packaging requirements with your procurement department for order fulfillment.

Q: Are contacts included with these connector housings?

A: No. Both the IL-Z-12S-S125C3 and the Molex 0510211200 are housings only. Contacts must be sourced separately and are not included with the housing purchase.