Amphenol ICC 77311-801-03 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 77311-801-03 is a vertical rectangular connector header with 3 positions at 2.54mm pitch, designed for through-hole board-to-board applications. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The BERGSTIK® series header features unshrouded male pins with solder termination and push-pull fastening, suitable for general-purpose electronic assemblies requiring reliable interconnection.

Key Parameters

Parameter	Value
Manufacturer Part Number	77311-801-03
Manufacturer	Amphenol ICC (FCI)
Category	Rectangular Connectors
Series	BERGSTIK®
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
Termination	Solder
Fastening Type	Push-Pull
Contact Shape	Square
Insulation Material	Thermoplastic
Material Flammability Rating	UL94 V-0
Insulation Color	Black
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 77311-801-03 is determined by strict alignment of the following critical parameters:

Pitch - Mating: 0.100" (2.54mm) - exact match required
Number of Positions: 3 - exact match required
Number of Rows: 1 - exact match required
Connector Type: Header - exact match required
Contact Type: Male Pin - exact match required
Mounting Type: Through Hole - exact match required
Termination: Solder - exact match required
Fastening Type: Push-Pull - exact match required
Contact Shape: Square - exact match required
Material Flammability Rating: UL94 V-0 - exact match required

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalent: 77311-801-03LF from Amphenol ICC (FCI) - identical series with active product status and RoHS compliance upgrade.

Cross-Manufacturer Alternatives: Molex KK254 series (0423752487, 0423752522) and 3M 2300 series (2303-6111-TB, 2303-6111-TP, 2303-6151-TB) - functionally equivalent headers meeting all critical mating and mechanical parameters while offering alternative material compositions and compliance certifications.

Parameter Comparison

Parameter	77311-801-03	77311-801-03LF	0423752487	0423752522	2303-6111-TB	2303-6111-TP	2303-6151-TB
Manufacturer	Amphenol ICC	Amphenol ICC	Molex	Molex	3M	3M	3M
Series	BERGSTIK®	BERGSTIK®	KK254, 42375	KK254, 42375	2300	2300	2300
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
Connector Type	Header	Header	Header, Breakaway	Header, Breakaway	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Kinked Pin, 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 Length - Mating	0.230" (5.84mm)	0.230" (5.84mm)	0.232" (5.90mm)	0.232" (5.90mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)
Contact Length - Post	0.095" (2.41mm)	0.095" (2.41mm)	0.153" (3.89mm)	0.153" (3.89mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.120" (3.05mm)
Overall Contact Length	0.425" (10.80mm)	0.425" (10.80mm)	0.475" (12.07mm)	0.475" (12.07mm)	0.450" (11.43mm)	0.450" (11.43mm)	0.450" (11.43mm)
Insulation Height	0.100" (2.54mm)	0.100" (2.54mm)	0.090" (2.29mm)	0.090" (2.29mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish - Mating	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold	Gold	Gold	Tin-Lead	Gold
Contact Finish - Post	Tin-Lead	Tin	Tin	Tin	Tin-Lead	Tin-Lead	Tin-Lead
Contact Material	Phosphor Bronze	Phosphor Bronze	Not specified	Not specified	Copper Alloy	Copper Alloy	Copper Alloy
Insulation Material	Thermoplastic	Thermoplastic	Polyamide (PA), Nylon, Glass Filled	Polyamide (PA), Nylon, Glass Filled	Thermoplastic, Glass Filled	Thermoplastic, Glass Filled	Thermoplastic, Glass Filled
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 (Amps)	Not specified	3A per Contact	Not specified	Not specified	3A	3A	3A
Operating Temperature	Not specified	-65°C ~ 125°C	Not specified	Not specified	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant
REACH Status	REACH Unaffected	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Affected	REACH Affected	REACH Affected
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For RoHS Compliant Applications:

The 77311-801-03LF from Amphenol ICC is the primary recommendation. This part maintains identical mechanical and electrical characteristics to the obsolete 77311-801-03 while achieving RoHS compliance and active product status. The upgrade from Tin-Lead to Tin contact finish on the post and the extended operating temperature range (-65°C to 125°C) provide enhanced reliability for modern applications.

For Non-RoHS Legacy Systems:

The 3M 2300 series headers (2303-6111-TB, 2303-6111-TP, 2303-6151-TB) offer functional equivalence with RoHS non-compliant status matching the original part. These alternatives provide established supply chains and are suitable for maintenance and repair of existing equipment where RoHS compliance is not required.

For Cross-Manufacturer Flexibility:

The Molex KK254 series (0423752487, 0423752522) provides active product status with ROHS3 compliance. These headers feature slightly longer contact posts (0.153" vs. 0.095") and different insulation material composition (glass-filled polyamide vs. thermoplastic), suitable for applications requiring alternative material properties or extended supplier options.

Compliance Considerations:

Applications requiring REACH compliance should prioritize 77311-801-03LF (REACH Affected status indicates active regulatory engagement). Applications with no REACH requirements may select from Molex alternatives (REACH Unaffected) or 3M options (REACH Affected).

Frequently Asked Questions (FAQ)

Q: Can the 77311-801-03LF directly replace the obsolete 77311-801-03?

A: Yes. The 77311-801-03LF maintains identical pitch (2.54mm), position count (3), row configuration (1), connector type (header), contact type (male pin), mounting method (through hole), and termination (solder). The primary differences are product status (active vs. obsolete), RoHS compliance upgrade, and contact finish on the post (Tin vs. Tin-Lead). These differences do not affect mechanical or electrical compatibility in standard applications.

Q: What are the key differences between Amphenol ICC and Molex alternatives?

A: Amphenol ICC 77311-801-03LF maintains the original BERGSTIK® series design with 0.095" post length. Molex KK254 series (0423752487, 0423752522) feature 0.153" post length and glass-filled polyamide insulation. The longer post length in Molex parts accommodates thicker PCB assemblies. Both meet UL94 V-0 flammability requirements and 2.54mm pitch specifications. Molex parts include breakaway connector capability.

Q: Are the 3M 2300 series headers suitable for new designs?

A: The 3M 2300 series (2303-6111-TB, 2303-6111-TP, 2303-6151-TB) are active products with established supply availability. However, they carry RoHS non-compliant status identical to the original 77311-801-03. For new designs requiring RoHS compliance, the 77311-801-03LF or Molex alternatives are preferred. The 3M options are appropriate for legacy system maintenance or applications where RoHS compliance is not mandated.

Q: What is the significance of contact finish differences?

A: The original 77311-801-03 uses Tin-Lead finish on the post. The 77311-801-03LF upgrades to Tin finish, reflecting RoHS compliance requirements. Tin finish provides equivalent solderability and electrical performance while eliminating lead content. Mating contact finish (Gold or Gold GXT™ on original; Gold on alternatives) remains functionally equivalent across all substitutes.

Q: Can I use parts with different contact post lengths interchangeably?

A: Contact post length affects PCB penetration depth. The original 77311-801-03 and 77311-801-03LF feature 0.095" post length. Molex alternatives provide 0.153" post length, and 3M alternatives provide 0.120" post length. Longer posts accommodate thicker PCB assemblies but may require design verification for applications with specific PCB thickness constraints. Mechanical compatibility must be confirmed for each application.

Q: What operating temperature range should I specify?

A: The original 77311-801-03 does not specify operating temperature. The 77311-801-03LF specifies -65°C to 125°C. The 3M 2300 series specifies -55°C to 105°C. Molex KK254 series do not specify operating temperature. For applications requiring extended temperature performance, the 77311-801-03LF provides the widest specified range. Verify actual application requirements before selecting based on temperature specifications.

Q: Are there packaging differences between these substitutes?

A: The original 77311-801-03 packaging is not specified. The 77311-801-03LF is supplied in Bulk packaging. Molex alternatives (0423752487, 0423752522) are supplied in Bulk packaging. 3M alternatives (2303-6111-TB, 2303-6111-TP, 2303-6151-TB) have unspecified packaging. Confirm packaging requirements with your procurement process, as bulk packaging may require reel or tape specifications for automated assembly.

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