LTMM-120-02-G-D-RA Equivalent & Substitute Parts

Part Overview

The LTMM-120-02-G-D-RA is a rectangular connector header manufactured by Samtec Inc., designed for through-hole, right-angle board-to-board applications. This 40-position, 2-row connector operates across a wide temperature range of -55°C to 125°C and features shrouded 4-wall construction with push-pull fastening. The part is currently active in production with 1133 units in stock. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to availability constraints, supply chain considerations, or design flexibility within the allowed parameter tolerances.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.079" (2.00mm)
Number of Positions	40
Number of Rows	2
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall
Termination	Solder
Fastening Type	Push-Pull
Contact Shape	Square
Insulation Material	Liquid Crystal Polymer (LCP)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LTMM-120-02-G-D-RA is determined by strict alignment of the following critical parameters:

Connector type (Header) and contact type (Male Pin)
Pitch and row spacing (0.079" / 2.00mm)
Position count and row configuration (40 positions, 2 rows)
Mounting style (Through Hole, Right Angle)
Shrouding configuration (Shrouded - 4 Wall)
Termination method (Solder)
Fastening mechanism (Push-Pull)
Contact shape (Square)
RoHS3 compliance and MSL rating

The TE Connectivity AMP Connectors part 4-1734493-0 qualifies as a substitute based on matching these core electrical and mechanical specifications. Variations in contact length, insulation height, contact finish composition, and operating temperature range are within acceptable tolerance for board-to-board connector applications where the primary functional requirements are maintained.

Parameter Comparison

Parameter	LTMM-120-02-G-D-RA (Samtec)	4-1734493-0 (TE Connectivity)
Connector Type	Header	Header
Contact Type	Male Pin	Male Pin
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)
Number of Positions	40	40
Number of Rows	2	2
Row Spacing - Mating	0.079" (2.00mm)	0.079" (2.00mm)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
Contact Shape	Square	Square
Contact Length - Mating	0.120" (3.05mm)	0.141" (3.60mm)
Contact Length - Post	0.090" (2.29mm)	0.118" (3.00mm)
Insulation Height	0.237" (6.03mm)	0.217" (5.51mm)
Contact Finish - Mating	Gold	Gold
Contact Finish - Post	Gold	Tin
Contact Material	Phosphor Bronze	Brass
Insulation Material	Liquid Crystal Polymer (LCP)	Polyamide (PA6T), Nylon 6T
Operating Temperature	-55°C ~ 125°C	-40°C ~ 105°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active

Engineering Selection Recommendations

Both the LTMM-120-02-G-D-RA and 4-1734493-0 maintain active production status and full ROHS3 compliance with MSL 1 rating, ensuring long-term availability and environmental regulatory adherence. Selection between these parts should be based on application-specific thermal and mechanical requirements. The Samtec LTMM-120-02-G-D-RA supports an extended operating temperature range of -55°C to 125°C, making it suitable for applications requiring broader thermal performance. The TE Connectivity 4-1734493-0 operates within -40°C to 105°C and includes rated current and voltage specifications (1A, 250VAC), providing defined electrical performance parameters for standard board-to-board interconnect applications. Both connectors feature identical pitch, position count, and mounting configuration, ensuring mechanical interchangeability within the specified parameter tolerances.

Frequently Asked Questions (FAQ)

Q: Are these connectors mechanically interchangeable? A: Yes. Both connectors share identical pitch (0.079" / 2.00mm), position count (40), row configuration (2 rows), mounting type (through-hole right-angle), and shrouding (4-wall). Mechanical interchangeability is confirmed for board-to-board applications.

Q: What are the key differences between these parts? A: Primary differences include operating temperature range (LTMM-120-02-G-D-RA: -55°C to 125°C vs. 4-1734493-0: -40°C to 105°C), contact material (Phosphor Bronze vs. Brass), post finish (Gold vs. Tin), insulation material (LCP vs. Polyamide), and contact length dimensions. The TE Connectivity part includes specified current and voltage ratings.

Q: Which part should I use for high-temperature applications? A: The LTMM-120-02-G-D-RA supports operation to 125°C and is appropriate for extended thermal range requirements. The 4-1734493-0 is rated to 105°C maximum.

Q: Are both parts RoHS compliant? A: Yes. Both connectors are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: Can I use these connectors in applications requiring specific current or voltage ratings? A: The 4-1734493-0 includes specified electrical ratings (1A, 250VAC). The LTMM-120-02-G-D-RA does not provide current or voltage specifications in the available data. Verify application requirements against the TE Connectivity part's electrical ratings if specified performance is required.

Q: What is the difference in contact finish between these parts? A: The LTMM-120-02-G-D-RA features gold plating on both mating and post contacts. The 4-1734493-0 uses gold on mating contacts and tin on post contacts, with different plating thicknesses specified for each.

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