3M 929971-01-20 Equivalent & Substitute Parts

Part Overview

The 3M 929971-01-20 is a 20-position rectangular receptacle connector with 0.100" (2.54mm) pitch, designed for board-to-board applications using through-hole solder termination. This connector features tin-lead contact finish and push-pull fastening, rated for 2A at 1000V operation across -55°C to 105°C. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Number of Positions	20
Pitch - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Current Rating	2A
Voltage Rating	1000V
Operating Temperature	-55°C ~ 105°C
Contact Type	Female Socket
Style	Board to Board

Substitute Part Grouping Explanation

Substitution of the 3M 929971-01-20 is based on the following critical parameters that must remain consistent:

Connector Position Count: 20 positions (fixed requirement)
Mating Pitch: 0.100" (2.54mm) (fixed requirement for mechanical compatibility)
Connector Type: Receptacle with female socket contacts
Mounting Method: Through-hole solder termination
Fastening Mechanism: Push-pull engagement
Board-to-Board Configuration: Vertical or elevated socket design

The Mill-Max 316-93-120-41-006000 qualifies as a substitute based on matching these core parameters. Both connectors maintain identical position count, pitch spacing, contact type, mounting method, and fastening approach, ensuring mechanical and electrical interchangeability in board-to-board applications.

Parameter Comparison

Parameter	3M 929971-01-20	Mill-Max 316-93-120-41-006000
Manufacturer	3M	Mill-Max Manufacturing Corp.
Number of Positions	20	20
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Connector Type	Receptacle	Elevated Socket
Contact Type	Female Socket	Female Socket
Style	Board to Board	Board to Board
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
Contact Finish - Mating	Tin-Lead	Gold
Insulation Height	0.235" (5.97mm)	0.236" (6.00mm)
Current Rating	2A	3A
Voltage Rating	1000V	Not specified
Operating Temperature	-55°C ~ 105°C	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS non-compliant

Engineering Selection Recommendations

The Mill-Max 316-93-120-41-006000 serves as the primary substitute for the obsolete 3M 929971-01-20. Selection should be based on the following factors:

Product Availability: The 3M 929971-01-20 is obsolete with no ongoing manufacturing. The Mill-Max alternative is active production status with 1135 units in current inventory, ensuring long-term supply chain continuity.

Mechanical Compatibility: Both connectors maintain identical 20-position configuration and 0.100" (2.54mm) pitch spacing, providing direct mechanical interchangeability in existing board layouts without redesign.

Electrical Performance: The Mill-Max substitute provides equal or superior electrical characteristics, with 3A current rating versus the original 2A specification. Operating temperature range extends to 125°C compared to 105°C maximum for the original part.

Contact Finish Differences: The original part uses tin-lead mating contacts, while the substitute employs gold plating. Gold contact finish provides enhanced corrosion resistance and lower contact resistance, representing an improvement for long-term reliability in storage and field conditions.

Compliance Status: Both connectors carry identical UL94 V-0 flammability certification and share non-compliant RoHS status. No compliance advantage exists between the two options.

Frequently Asked Questions (FAQ)

Q: Can the Mill-Max 316-93-120-41-006000 directly replace the 3M 929971-01-20 without PCB modification?

A: Yes. Both connectors maintain identical 20-position count, 0.100" (2.54mm) pitch, through-hole solder termination, and push-pull fastening. PCB footprints are mechanically compatible. The elevated socket design of the Mill-Max part provides equivalent board-to-board spacing.

Q: What is the significance of the contact finish difference between tin-lead and gold?

A: Tin-lead contacts oxidize over time, potentially increasing contact resistance in storage or high-humidity environments. Gold plating on the Mill-Max substitute resists oxidation and corrosion, maintaining lower contact resistance throughout the product lifecycle.

Q: Does the higher current rating of the Mill-Max part (3A vs. 2A) affect compatibility?

A: No. Higher current rating indicates improved capability and does not create incompatibility. The substitute can safely handle applications designed for the original 2A specification.

Q: Are there any temperature range considerations when substituting?

A: The Mill-Max substitute operates to 125°C versus 105°C for the original part. This extended range provides additional thermal margin and is fully compatible with applications designed for the original temperature specification.

Q: What packaging format is provided for the Mill-Max substitute?

A: The Mill-Max 316-93-120-41-006000 is supplied in tube packaging, suitable for both manual and automated assembly processes.

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