TMM-102-02-LM-S Equivalent & Substitute Parts

Part Overview

The TMM-102-02-LM-S is a 2-position rectangular connector header manufactured by Samtec Inc., designed for through-hole board-to-board or cable applications. This unshrouded header features a 2.00mm pitch with gold-plated mating contacts and tin-plated posts, rated for 3.2A per contact across an operating temperature range of -55°C to 125°C. The part is ROHS3 compliant and carries an MSL rating of 1 (Unlimited). As an active product with 719 units in stock, substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when specific application requirements necessitate alternative configurations.

Key Parameters

Parameter	Value
Manufacturer	Samtec Inc.
Series	TMM
Connector Type	Header
Contact Type	Male Pin
Number of Positions	2
Pitch - Mating	0.079" (2.00mm)
Mounting Type	Through Hole
Termination	Solder
Contact Finish - Mating	Gold
Contact Finish - Post	Tin
Current Rating	3.2A per Contact
Operating Temperature	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TMM-102-02-LM-S is determined by strict equivalence across the following critical parameters:

Manufacturer and Series: Samtec Inc. TMM series
Connector Type and Contact Type: Header with Male Pin contacts
Number of Positions: 2-position configuration
Pitch - Mating: 0.079" (2.00mm) spacing
Mounting Type: Through Hole
Termination Method: Solder
Contact Material and Finish: Phosphor Bronze with Gold mating finish and Tin post finish
Current Rating: 3.2A per Contact minimum
Operating Temperature Range: -55°C ~ 125°C
Compliance: ROHS3 Compliant

The identified substitute part TMM-102-02-L-S meets all these criteria, differing only in fastening type designation and MSL classification, which do not affect electrical or mechanical compatibility in standard applications.

Parameter Comparison

Parameter	TMM-102-02-LM-S	TMM-102-02-L-S
Manufacturer	Samtec Inc.	Samtec Inc.
Series	TMM	TMM
Connector Type	Header	Header
Contact Type	Male Pin	Male Pin
Number of Positions	2	2
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)
Number of Rows	1	1
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Contact Length - Mating	0.146" (3.71mm)	0.146" (3.71mm)
Contact Length - Post	0.118" (3.00mm)	0.118" (3.00mm)
Overall Contact Length	0.323" (8.20mm)	0.323" (8.20mm)
Insulation Height	0.059" (1.50mm)	0.059" (1.50mm)
Contact Shape	Square	Square
Contact Finish - Mating	Gold	Gold
Contact Finish Thickness - Mating	10.0µin (0.25µm)	10.0µin (0.25µm)
Contact Finish - Post	Tin	Tin
Contact Material	Phosphor Bronze	Phosphor Bronze
Insulation Material	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
Insulation Color	Black	Black
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating	3.2A per Contact	3.2A per Contact
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
ECCN	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040

Engineering Selection Recommendations

Both the TMM-102-02-LM-S and TMM-102-02-L-S are active products manufactured by Samtec Inc. within the TMM series. Selection between these parts should be based on inventory availability and application-specific requirements:

The TMM-102-02-LM-S carries an MSL rating of 1 (Unlimited), indicating no moisture sensitivity constraints for storage and handling. The TMM-102-02-L-S is classified as REACH Unaffected with MSL listed as Not Applicable, reflecting a different regulatory classification approach by the manufacturer.

Both parts maintain identical electrical and mechanical specifications, including the 2.00mm pitch, 3.2A per contact current rating, and -55°C to 125°C operating temperature range. Both are ROHS3 compliant and suitable for through-hole solder termination applications.

Frequently Asked Questions (FAQ)

Q: Can TMM-102-02-L-S be used as a direct replacement for TMM-102-02-LM-S?

A: Yes. Both parts share identical connector type, contact configuration, pitch, current rating, operating temperature range, and contact materials. The parts are electrically and mechanically equivalent for standard applications.

Q: What is the significance of the different MSL ratings between these parts?

A: The TMM-102-02-LM-S has an MSL rating of 1 (Unlimited), while the TMM-102-02-L-S is listed as Not Applicable. MSL ratings govern moisture sensitivity during storage and handling. An MSL of 1 indicates no moisture-related constraints. The Not Applicable designation on the substitute part reflects alternative regulatory documentation by the manufacturer but does not indicate reduced performance or compatibility.

Q: Are there any differences in contact finish or material composition?

A: No. Both parts feature Phosphor Bronze contacts with gold-plated mating surfaces (10.0µin thickness) and tin-plated posts. The contact geometry, including the square shape and overall length of 0.323" (8.20mm), is identical.

Q: What is the pitch specification, and why is it critical for substitution?

A: Both parts maintain a 0.079" (2.00mm) mating pitch. This specification determines mechanical compatibility with mating connectors and PCB footprints. Any substitute must match this pitch exactly.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the TMM-102-02-LM-S and TMM-102-02-L-S are rated for -55°C to 125°C continuous operation, making them suitable for identical thermal environments.

Q: What is the current-carrying capacity of each contact?

A: Both parts are rated for 3.2A per contact, providing identical current-handling capability for circuit applications.

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