3M 2303-5151-TG Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 2303-5151-TG is an active-status rectangular connector header designed for through-hole, right-angle board-to-board or cable applications. This 3-position, 0.100" (2.54mm) pitch connector features male pins with gold-plated mating contacts and tin-lead plated posts, rated for 3A current and operating temperatures from -55°C to 105°C. The connector is constructed with thermoplastic, glass-filled insulation and meets UL94 V-0 flammability requirements.

Substitute parts are necessary when the original 3M part is unavailable, when alternative compliance certifications are required (such as RoHS3 compliance), or when specific packaging or contact finish specifications better suit application requirements.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	3
Number of Rows	1
Mounting Type	Through Hole, Right Angle
Termination	Solder
Fastening Type	Push-Pull
Contact Shape	Square
Material Flammability Rating	UL94 V-0
Current Rating	3A
Operating Temperature	-55°C ~ 105°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 3M 2303-5151-TG is determined by the following critical parameters:

Pitch and Position Compatibility: All substitute parts maintain 0.100" (2.54mm) mating pitch with 3 positions in a single row, ensuring mechanical and electrical compatibility with mating connectors designed for the original part.
Mounting and Termination: All substitutes feature through-hole, right-angle mounting with solder termination, maintaining identical PCB integration requirements.
Contact Configuration: All parts use male pin contacts with square contact shapes, preserving electrical performance characteristics.
Electrical Rating: All substitutes maintain 3A current rating and UL94 V-0 flammability compliance, meeting safety and performance thresholds.
Contact Finish Variations: Substitutes differ in mating contact finish (gold or tin) and contact material (copper alloy, phosphor bronze, or brass), which do not affect interchangeability but may influence corrosion resistance and cost.
Compliance Status: Substitutes include both RoHS3-compliant and RoHS non-compliant options, allowing selection based on regulatory requirements.

Parameter Comparison

Parameter	3M 2303-5151-TG	Molex 0022288034	Amphenol ICC 68015-103HLF	Amphenol ICC 68016-403HLF	Harwin M20-9750342	Harwin M20-9750346	Harwin M20-9960345
Manufacturer	3M	Molex	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Harwin Inc.	Harwin Inc.	Harwin Inc.
Connector Type	Header	Header, Breakaway	Header	Header	Header, Cuttable	Header, Cuttable	Header, Cuttable
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Number of Positions	3	3	3	3	3	3	3
Number of Rows	1	1	1	1	1	1	1
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Kinked Pin, Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Shape	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold or Gold, GXT™	Tin	Gold	Tin	Gold
Contact Material	Copper Alloy	Not specified	Phosphor Bronze	Phosphor Bronze	Brass	Brass	Brass
Insulation Material	Thermoplastic, Glass Filled	Polyamide (PA), Nylon, Glass Filled	Not specified	Not specified	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Insulation Color	Black	Black	Black	Black	Black	Black	Black
Current Rating	3A	Not specified	3A per Contact	3A	3A per Contact	3A per Contact	3A per Contact
Operating Temperature	-55°C ~ 105°C	Not specified	Not specified	-65°C ~ 130°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status and full mechanical and electrical compatibility with the 3M 2303-5151-TG. Selection among substitutes should be based on specific regulatory and compliance requirements:

For RoHS3 Compliance Requirements: Molex 0022288034, Harwin M20-9750342, Harwin M20-9750346, and Harwin M20-9960345 are ROHS3-compliant alternatives. The Amphenol ICC parts (68015-103HLF and 68016-403HLF) are RoHS-compliant but not explicitly ROHS3-certified.

For REACH Compliance: Molex 0022288034, Amphenol ICC 68015-103HLF, and all Harwin M20 series parts are REACH-unaffected, providing regulatory advantage over the original 3M part and Amphenol ICC 68016-403HLF, which are REACH-affected.

For Extended Temperature Range: Amphenol ICC 68016-403HLF supports -65°C to 130°C operation, exceeding the original part's -55°C to 105°C range. Harwin M20 series parts operate from -40°C to 105°C, matching the original part's upper limit but with reduced lower-temperature capability.

For Contact Finish Specifications: Gold-plated mating contacts are available in Molex 0022288034, Amphenol ICC 68015-103HLF, Harwin M20-9750342, and Harwin M20-9960345. Tin-plated alternatives are available in Amphenol ICC 68016-403HLF and Harwin M20-9750346.

Frequently Asked Questions (FAQ)

Q: Are all substitute parts mechanically interchangeable with the 3M 2303-5151-TG?

A: Yes. All substitute parts share identical mating pitch (0.100" / 2.54mm), position count (3), row configuration (1 row), mounting type (through-hole, right-angle), and contact shape (square). They are mechanically interchangeable with mating connectors designed for the original part.

Q: What is the difference between gold-plated and tin-plated contact finishes?

A: Contact finish affects corrosion resistance and cost. Gold-plated contacts provide superior corrosion resistance and are preferred for high-reliability applications. Tin-plated contacts are cost-effective and suitable for standard industrial applications. Both finishes maintain electrical performance within the 3A current rating.

Q: Which substitute part has the widest operating temperature range?

A: Amphenol ICC 68016-403HLF operates from -65°C to 130°C, providing the widest temperature range. The original 3M part and most substitutes operate from -55°C to 105°C or -40°C to 105°C.

Q: What is the significance of RoHS3 compliance?

A: RoHS3 compliance indicates conformance to the Restriction of Hazardous Substances Directive 2011/65/EU as amended. Molex 0022288034 and all Harwin M20 series parts are ROHS3-compliant, making them suitable for applications requiring strict EU regulatory compliance. The original 3M part is RoHS non-compliant.

Q: Are there packaging differences among the substitute parts?

A: Yes. Molex 0022288034 and Harwin M20 series parts are supplied in bulk packaging. Amphenol ICC parts (68015-103HLF and 68016-403HLF) are supplied in bag packaging. Packaging does not affect electrical or mechanical performance.

Q: What does "REACH Unaffected" status mean?

A: REACH Unaffected status indicates the part does not contain substances of very high concern (SVHC) listed under the EU REACH regulation. Molex 0022288034, Amphenol ICC 68015-103HLF, and all Harwin M20 series parts are REACH-unaffected, providing regulatory advantage for EU applications.

Q: Can I use a tin-plated substitute in place of a gold-plated original?

A: Yes, mechanically and electrically. However, tin-plated contacts have lower corrosion resistance than gold-plated contacts. For applications requiring high reliability or extended shelf life, gold-plated alternatives are preferred.

Q: What is the difference between "Header" and "Header, Cuttable" connector types?

A: "Header, Cuttable" designation indicates the connector can be cut or separated into individual positions if required. This feature does not affect interchangeability with standard headers but provides additional application flexibility for the Harwin M20 series parts.

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