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IL-Z-3S-S125C3 Equivalent & Substitute Parts
Part Overview
The IL-Z-3S-S125C3 is a 3-position rectangular connector receptacle housing manufactured by JAE Electronics with a 0.049" (1.25mm) pitch. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support and procurement continuity. The connector features a friction lock fastening mechanism and accepts crimp-terminated female socket contacts. Due to its obsolete status, active production alternatives are required for new designs and component replenishment.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Connector Type | Receptacle |
| Contact Type | Female Socket |
| Number of Positions | 3 |
| Pitch | 0.049" (1.25mm) |
| Number of Rows | 1 |
| Mounting Type | Free Hanging (In-Line) |
| Contact Termination | Crimp |
| Fastening Type | Friction Lock |
| Operating Temperature Range | -40°C ~ 70°C |
| Insulation Material | Polyamide (PA66), Nylon 6/6, Glass Filled |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the IL-Z-3S-S125C3 is determined by strict equivalence across the following critical parameters:
- Connector Type & Contact Configuration: Receptacle housing with female socket contacts
- Position Count & Pitch: 3 positions at 0.049" (1.25mm) spacing
- Mounting & Termination: Free hanging in-line mounting with crimp contact termination
- Fastening Mechanism: Friction lock engagement system
- Electrical & Environmental Compliance: Operating temperature range, moisture sensitivity, and regulatory classifications
The substitute part 0510210300 (Molex PicoBlade 51021 series) meets all these criteria. Both housings accept the same contact pitch and termination method, enabling direct functional replacement in applications where the connector footprint and contact interface are identical.
Parameter Comparison
| Parameter | IL-Z-3S-S125C3 (JAE) | 0510210300 (Molex) |
|---|---|---|
| Connector Type | Receptacle | Receptacle |
| Contact Type | Female Socket | Female Socket |
| Number of Positions | 3 | 3 |
| Pitch | 0.049" (1.25mm) | 0.049" (1.25mm) |
| Number of Rows | 1 | 1 |
| Mounting Type | Free Hanging (In-Line) | Free Hanging (In-Line) |
| Contact Termination | Crimp | Crimp |
| Fastening Type | Friction Lock | Friction Lock |
| Operating Temperature Range | -40°C ~ 70°C | -40°C ~ 105°C |
| Insulation Material | Polyamide (PA66), Nylon 6/6, Glass Filled | Polybutylene Terephthalate (PBTP) |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Obsolete | Active |
| RoHS Status | Not specified | ROHS3 Compliant |
Engineering Selection Recommendations
The Molex 0510210300 is the qualified substitute for the obsolete IL-Z-3S-S125C3 based on the following factors:
Functional Equivalence: Both connectors share identical pitch, position count, mounting configuration, and crimp termination method. The receptacle housings are mechanically and electrically interchangeable when mated with compatible plug contacts.
Product Status & Availability: The IL-Z-3S-S125C3 is obsolete with limited remaining inventory (929 pcs). The Molex substitute is active production with substantial stock availability (118,281 pcs), ensuring long-term procurement viability.
Compliance & Certifications: The Molex part carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. Both components share identical moisture sensitivity classification and ECCN/HTSUS codes.
Operating Temperature: The Molex substitute supports an extended operating range (-40°C ~ 105°C) compared to the original (-40°C ~ 70°C), providing additional thermal margin for demanding applications.
Material Consideration: The insulation material differs (PA66 glass-filled nylon versus PBTP), but both materials are suitable for the specified environmental and electrical requirements at the stated operating temperatures.
Frequently Asked Questions (FAQ)
Q: Can the IL-Z-3S-S125C3 and 0510210300 housings be used interchangeably?
A: Yes. Both are 3-position receptacle housings with 0.049" (1.25mm) pitch, friction lock fastening, and crimp termination. They accept the same contact interface and mounting configuration.
Q: Are the contacts interchangeable between these two housings?
A: Contact compatibility depends on the specific contact part numbers used. Both housings accept crimp-terminated female socket contacts at 1.25mm pitch, but contact selection must be verified against the housing manufacturer specifications.
Q: What is the impact of the different insulation materials?
A: The PA66 glass-filled nylon (original) and PBTP (substitute) both meet the operating temperature and environmental requirements specified. Material selection does not affect electrical or mechanical compatibility for this application.
Q: Why is the operating temperature range different?
A: The Molex PicoBlade series is rated to 105°C, exceeding the original 70°C specification. This represents an enhancement and does not create compatibility issues for applications within the original temperature range.
Q: Is the Molex part RoHS compliant?
A: Yes, the 0510210300 is ROHS3 compliant. RoHS compliance status was not specified for the original JAE part.
Q: What is the moisture sensitivity level for both parts?
A: Both connectors carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.
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