SSQ-120-03-S-D Equivalent & Substitute Parts

Part Overview

The SSQ-120-03-S-D is a 40-position receptacle connector manufactured by Samtec Inc., designed for board-to-board or cable applications with 0.100" (2.54mm) pitch spacing. This connector features gold-plated mating contacts, through-hole solder termination, and push-pull fastening. The product is currently active and stocked at 844 units. Alternative equivalent parts may be required due to supply constraints, design revisions, or specific application requirements that demand different electrical or mechanical characteristics.

Substiute Parts

SSQ-120-03-S-D

Samtec Inc.In Stock: 855SSQ-120-03-S-D Datasheet

Current PartRFQ

929852-01-20-RB

3MIn Stock: 1293929852-01-20-RB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3M 929852-01-20-RB qualifies as a functional equivalent to the SSQ-120-03-S-D based on the following critical parameters:

• 40-position receptacle configuration with identical mating pitch (0.100" / 2.54mm)
• 2-row layout with matching row spacing (0.100" / 2.54mm)
• Through-hole solder termination with push-pull fastening
• Gold-plated mating contacts with forked contact geometry
• Square contact shape and copper alloy contact material
• UL94 V-0 flammability rating and MSL 1 classification
• RoHS compliance and REACH unaffected status

Both connectors are designed for identical mechanical and electrical interface requirements in board-to-board applications. Substitution is valid where the specific differences in insulation height, contact post length, operating temperature range, and voltage rating do not conflict with application constraints.

Parameter Comparison

Engineering Selection Recommendations

Both the SSQ-120-03-S-D and 929852-01-20-RB are active products with full RoHS compliance and MSL 1 classification, making them suitable for production applications. The primary selection criteria depend on application-specific constraints:

The SSQ-120-03-S-D supports an extended operating temperature range (-55°C to 125°C) and lower voltage rating (465VAC / 655VDC), with a longer contact post (0.394"). This configuration is appropriate for applications requiring wide temperature operation or where the specific voltage and current characteristics align with system requirements.

The 929852-01-20-RB operates within -40°C to 105°C and provides a higher voltage rating (1500V) with a specified current rating of 2A and shorter contact post (0.125"). This variant is suitable for applications with moderate temperature requirements and higher voltage tolerance needs.

Mechanical compatibility must be verified for the 0.010" (0.26mm) difference in insulation height and the 0.269" (6.82mm) difference in contact post length, as these dimensions affect PCB layout and mating interface geometry.

Frequently Asked Questions (FAQ)

Q: Can the 929852-01-20-RB directly replace the SSQ-120-03-S-D in existing designs?

A: Direct mechanical and electrical substitution is possible only if the PCB layout accommodates the shorter contact post length (0.125" vs. 0.394") and the 0.010" reduction in insulation height. The mating pitch, row spacing, and connector footprint are identical. Verify that the application voltage and current requirements fall within the 929852-01-20-RB specifications (1500V, 2A).

Q: What are the key differences between these two connectors?

A: The primary differences are contact post length, insulation height, operating temperature range, voltage rating, and insulation material composition. The SSQ-120-03-S-D uses Liquid Crystal Polymer insulation with a longer post, while the 929852-01-20-RB uses glass-filled polyester with a shorter post. The 929852-01-20-RB has a higher voltage rating but narrower temperature range.

Q: Are both connectors RoHS compliant?

A: Yes. The SSQ-120-03-S-D is ROHS3 compliant, and the 929852-01-20-RB is RoHS compliant. Both meet current environmental regulations and carry MSL 1 (unlimited) moisture sensitivity classification.

Q: What is the impact of the different contact post lengths?

A: The contact post length determines the depth of insertion into the mating connector and affects the overall stack height of the assembled connector pair. The SSQ-120-03-S-D's longer post (0.394") may provide different mechanical engagement characteristics compared to the 929852-01-20-RB's shorter post (0.125"). PCB design and mating connector specifications must be reviewed to ensure compatibility.

Q: Which connector should be selected for high-temperature applications?

A: The SSQ-120-03-S-D supports operation up to 125°C, making it suitable for high-temperature environments. The 929852-01-20-RB is rated to 105°C maximum. For applications exceeding 105°C, the SSQ-120-03-S-D is the appropriate choice.