931-SLS/03 Terminal Block Header Equivalent & Substitute Parts

Part Overview

The 931-SLS/03 is a 3-position terminal block header manufactured by WECO Electrical Connectors Inc. This component is a male pin, unshrouded header designed for vertical through-hole mounting with solder termination. The part operates at 300 V (UL) and 6 A (UL) with a 0.138" (3.50mm) pitch configuration. The product maintains Active status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical specifications are met, enabling component interchangeability in applications where the original part is unavailable or inventory constraints exist.

Substiute Parts

931-SLS/03

WECO Electrical Connectors Inc.In Stock: 1271931-SLS/03 Datasheet

Current PartRFQ

1945106

Phoenix ContactIn Stock: 186471945106 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 931-SLS/03 is determined by strict equivalence across the following critical parameters:

Position and Pitch Configuration: The substitute part must maintain 3 positions with 0.138" (3.50mm) pitch spacing to ensure mechanical compatibility with mating connectors and PCB layouts.

Header Type and Orientation: The substitute must be a male pin, unshrouded header in vertical orientation to match the original mounting and electrical interface requirements.

Electrical Ratings: The substitute must meet or exceed the UL voltage rating of 300 V and UL current rating of 6 A to ensure safe operation within the original application parameters.

Termination and Mounting: Solder termination and through-hole mounting type are mandatory for PCB assembly compatibility.

Material and Finish Specifications: Tin contact mating finish and black color ensure consistent electrical performance and visual identification.

Compliance Status: ROHS3 compliance is required to maintain regulatory alignment with the original component.

The substitute part 1945106 (Phoenix Contact) satisfies all these criteria and is therefore classified as an equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

The 931-SLS/03 and 1945106 are functionally equivalent for applications requiring a 3-position, 3.50mm pitch vertical terminal block header with solder termination. Both components are Active products with ROHS3 compliance and identical electrical ratings at the UL 300 V and 6 A specification level.

The 1945106 substitute provides enhanced current capacity (10 A UL versus 6 A UL) and is rated for 8 A at 250 V under IEC standards, offering additional safety margin in current-limited applications. Both components feature tin contact mating finish and black housing for consistent electrical and visual performance.

Physical dimensions differ between the two parts. The 1945106 exhibits a shorter contact tail length (0.150" versus 0.170") and greater insulation height (0.512" versus 0.260"). These dimensional variations require verification against PCB layout specifications, through-hole depth, and clearance requirements in the target application before substitution.

Selection between these parts should be based on inventory availability, lead time requirements, and confirmation that the dimensional differences do not conflict with the mechanical constraints of the application.

Frequently Asked Questions (FAQ)

Q: Can the 1945106 be used as a direct replacement for the 931-SLS/03?

A: The 1945106 is electrically and functionally equivalent for applications operating at or below 300 V and 6 A. However, the dimensional differences in contact tail length and insulation height must be evaluated against the specific PCB layout and mechanical clearances of your application before substitution.

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

A: Both parts share identical pitch (3.50mm), position count (3), orientation (vertical), and termination method (solder). The primary differences are: (1) the 1945106 has a higher UL current rating (10 A versus 6 A), (2) the 1945106 contact tail is 0.020" shorter, and (3) the 1945106 insulation height is 0.252" taller. These differences do not affect electrical compatibility but may impact mechanical fit.

Q: Are both parts RoHS compliant?

A: Yes, both the 931-SLS/03 and 1945106 are ROHS3 compliant and suitable for applications requiring RoHS certification.

Q: What is the significance of the contact tail length difference?

A: Contact tail length determines how deeply the pins penetrate the PCB. The 931-SLS/03 has a 0.170" tail versus 0.150" for the 1945106. If your PCB design requires a specific tail depth for solder joint formation or mechanical support, this 0.020" difference must be considered.

Q: Does the increased insulation height of the 1945106 affect compatibility?

A: The 1945106 insulation height is 0.512" compared to 0.260" for the 931-SLS/03. This taller profile may affect clearance above the PCB surface. Verify that your application has sufficient vertical clearance and that the increased height does not interfere with adjacent components or enclosure constraints.

Q: Can I use the 1945106 in a high-current application?

A: The 1945106 is rated for 10 A (UL) and 8 A (IEC at 250 V), compared to the 931-SLS/03 at 6 A (UL). The 1945106 provides additional current capacity and is suitable for applications requiring higher current handling within these ratings.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant. The 1945106 carries UL94 V-0 material flammability rating. Both are classified under ECCN EAR99 and HTSUS 8536.69.4040 for export and tariff purposes.