3M 159120-2002 Rectangular Connector Header Surface Mount 20 Position 2.00mm

Part Overview

The 3M 159120-2002 is a surface mount rectangular connector header with 20 positions arranged in 2 rows at 0.079" (2.00mm) pitch. This connector features shrouded 4-wall construction with male pin contacts, solder termination, and detent lock fastening. The part operates across -55°C to 105°C with a current rating of 1.25A at 150V. The product is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	20
Number of Rows	2
Pitch - Mating	0.079" (2.00mm)
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Surface Mount
Shrouding	Shrouded - 4 Wall
Termination	Solder
Operating Temperature	-55°C ~ 105°C
Current Rating	1.25A
Voltage Rating	150V
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the 3M 159120-2002 is determined by the following critical parameters that must align with the original specification:

Core Compatibility Criteria:

Connector type: Header (male pin contact)
Position count: 20 positions in 2-row configuration
Mating pitch: 0.079" (2.00mm) with matching row spacing
Mounting: Surface mount solder termination
Shrouding: 4-wall shrouded construction
Contact shape: Square
Insulation material: Liquid Crystal Polymer (LCP) or equivalent thermoplastic
Keying slot: Present for polarization

Acceptable Parameter Variations:

Contact length mating: 0.100" to 0.157" (2.54mm to 4.00mm)
Insulation height: 0.190" to 0.244" (4.83mm to 6.20mm)
Current rating: 1.25A minimum (2A acceptable for higher margin)
Voltage rating: 150V minimum (200V acceptable)
Operating temperature: -55°C minimum to 105°C minimum (extended range acceptable)
Fastening type: Detent lock or push-pull latch mechanisms
Contact finish: Gold mating surface with tin or gold post finish
Product status: Active preferred for long-term availability

Substitute parts must maintain board-to-board or board-to-cable compatibility with identical pitch geometry and shrouded header form factor.

Parameter Comparison

Parameter	3M 159120-2002	98424-F52-20LF	98424-G52-20LF	LTMM-110-01-F-D-SM	LTMM-110-01-G-D-SM-LC-K
Manufacturer	3M	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Samtec Inc.	Samtec Inc.
Connector Type	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	20	20	20	20	20
Number of Rows	2	2	2	2	2
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Row Spacing - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Termination	Solder	Solder	Solder	Solder	Solder
Contact Length - Mating	0.142" (3.61mm)	0.157" (4.00mm)	0.157" (4.00mm)	0.100" (2.54mm)	0.100" (2.54mm)
Insulation Height	0.210" (5.33mm)	0.244" (6.20mm)	0.244" (6.20mm)	0.190" (4.83mm)	0.190" (4.83mm)
Contact Shape	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold, GXT™	Gold	Gold
Contact Material	Copper Alloy	Copper Alloy	Copper Alloy	Phosphor Bronze	Phosphor Bronze
Insulation Material	LCP, Glass Filled	Thermoplastic	Thermoplastic	LCP	LCP
Operating Temperature	-55°C ~ 105°C	-	-	-55°C ~ 105°C	-55°C ~ 125°C
Current Rating	1.25A	2A (AC/DC)	2A (AC/DC)	-	-
Voltage Rating	150V	200V (AC/DC)	200V (AC/DC)	-	-
Fastening Type	Detent Lock	Latch Holder	Latch Holder	Push-Pull	Push-Pull
Features	Keying Slot	Keying Slot	Keying Slot	Keying Slot	Board Lock, Keying Slot, Pick and Place
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Amphenol ICC Minitek® 2.00mm Series):

The 98424-F52-20LF and 98424-G52-20LF represent the most direct functional equivalents. Both maintain identical pitch geometry, position count, and shrouded 4-wall construction. These parts feature latch holder fastening instead of detent lock, with increased current capacity (2A) and voltage rating (200V). Product status is active with RoHS compliance. The 98424-G52-20LF includes GXT™ gold plating on mating contacts, providing enhanced corrosion resistance. Amphenol ICC parts are thermoplastic-based insulation rather than LCP, suitable for standard operating temperature ranges.

Secondary Substitutes (Samtec Flex Stack LTMM Series):

The LTMM-110 series from Samtec provides active product alternatives with push-pull fastening mechanisms. These connectors feature phosphor bronze contacts with gold finish and LCP insulation, matching the original material composition. The LTMM-110-01-F-D-SM maintains the original -55°C to 105°C operating range, while variants with -G designation extend to -55°C to 125°C. The LTMM-110-01-G-D-SM-LC-K includes board lock and pick-and-place features for enhanced assembly reliability. Samtec parts carry ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Selection Criteria:

For direct replacement in existing designs, Amphenol ICC 98424 series parts offer the closest mechanical and electrical compatibility with active product status. For new designs requiring extended temperature performance or enhanced assembly features, Samtec LTMM-110 series variants provide superior specifications with board lock and pick-and-place capabilities. All substitute parts maintain the critical 2.00mm pitch and 20-position configuration required for PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with different contact length mating specifications?

A: Yes. The original 3M 159120-2002 specifies 0.142" (3.61mm) contact length mating. Substitute parts with 0.100" (2.54mm) or 0.157" (4.00mm) mating contact lengths are acceptable provided the mating connector receptacle accommodates the variation. Verify receptacle specifications before substitution.

Q: What is the difference between detent lock and push-pull fastening?

A: The original part uses detent lock fastening for positive engagement. Substitute parts with push-pull fastening provide equivalent mechanical retention through different locking mechanisms. Both ensure secure mated connection; push-pull designs offer easier disconnect cycles. Verify application requirements for disconnect force specifications.

Q: Are Amphenol ICC and Samtec parts interchangeable with the 3M 159120-2002?

A: Both manufacturers' parts are mechanically and electrically compatible for the specified 20-position 2.00mm pitch header application. Amphenol ICC parts feature thermoplastic insulation with higher current/voltage ratings. Samtec parts feature LCP insulation with extended temperature range options. PCB footprint compatibility requires verification of exact pad dimensions and spacing.

Q: Does the insulation material difference affect performance?

A: The original LCP glass-filled insulation and substitute thermoplastic or LCP materials all meet UL94 V-0 flammability requirements. LCP provides superior dimensional stability and temperature performance. Thermoplastic insulation is suitable for standard operating ranges. Material selection should align with application temperature extremes and mechanical stress requirements.

Q: What is the significance of the GXT™ gold plating on the 98424-G52-20LF?

A: GXT™ represents enhanced gold plating technology providing superior corrosion resistance compared to standard gold finish. This is beneficial for applications with extended shelf life, harsh environments, or high-reliability requirements. Standard gold finish on other substitutes is adequate for typical industrial applications.

Q: Can I substitute parts with different current and voltage ratings?

A: Yes. The original 1.25A at 150V specification can be replaced with higher-rated parts (2A at 200V) without performance degradation. Higher ratings provide design margin and reliability improvement. Verify that PCB trace sizing and connector termination support the original current specification; higher-rated parts do not require design changes.

Q: What packaging options are available for these substitutes?

A: Amphenol ICC 98424 series is supplied in bulk packaging. Samtec LTMM-110 variants are available in tube or bulk packaging depending on part number designation. Verify packaging requirements for your procurement and assembly processes.

Q: Are all substitute parts RoHS compliant?

A: Yes. The original 3M 159120-2002 is ROHS3 compliant. All listed substitute parts from Amphenol ICC and Samtec maintain RoHS compliance, suitable for applications requiring restricted substance compliance.

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