Amphenol ICC 66900-340 Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 66900-340 is a 40-position rectangular receptacle connector with IDC (Insulation Displacement Contact) termination, designed for ribbon cable applications with 28-30 AWG wire gauge. This connector features a dual-row configuration with 0.100" pitch spacing, gold-plated contacts with GXT™ finish, and polarizing key features for secure mating. The part is currently listed as obsolete, making identification of equivalent and substitute components essential for ongoing system support and procurement planning.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Number of Positions	40
Pitch	0.100" (2.54mm)
Number of Rows	2
Row Spacing	0.100" (2.54mm)
Cable Termination	IDC
Wire Gauge	28-30 AWG
Contact Finish	Gold
Mounting Type	Free Hanging (In-Line)
Features	Feed Through, Polarizing Key

Substitute Part Grouping Explanation

Substitute parts for the 66900-340 are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Connector type (Receptacle)
Number of positions (40)
Pitch spacing (0.100" / 2.54mm)
Row configuration (2 rows with 0.100" spacing)
IDC cable termination method
Contact finish (Gold)
Polarizing key feature presence
Feed-through capability

Wire Gauge Consideration: The 66900-340 accepts 28-30 AWG ribbon cable. Substitute parts with compatible or overlapping wire gauge ranges (26-28 AWG or 28-30 AWG) are acceptable for IDC termination applications, as IDC contacts accommodate wire gauge variations within specified ranges.

Parameter Comparison

Parameter	66900-340 (Main)	66900-340LF (Direct)	89140-0101 (MFR Recommended)
Manufacturer	Amphenol ICC (FCI)	Amphenol ICC (FCI)	3M
Connector Type	Receptacle	Receptacle	Receptacle
Number of Positions	40	40	40
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	2	2	2
Row Spacing	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Cable Termination	IDC	IDC	IDC
Wire Gauge	28-30 AWG	28-30 AWG	26-28 AWG
Contact Finish	Gold, GXT™	Gold, GXT™	Gold
Mounting Type	Free Hanging (In-Line)	Free Hanging (In-Line)	Free Hanging (In-Line)
Features	Feed Through, Polarizing Key	Feed Through, Polarizing Key	Feed Through, Polarizing Key
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant

Engineering Selection Recommendations

66900-340LF (Direct Amphenol ICC Substitute): This part is the direct successor to the 66900-340, manufactured by the same supplier (Amphenol ICC). It maintains identical electrical and mechanical specifications, including 40-position configuration, 0.100" pitch, 28-30 AWG wire gauge compatibility, and GXT™ gold contact finish. The primary distinction is product status: 66900-340LF is active and RoHS Compliant, whereas the original 66900-340 is obsolete and RoHS non-compliant. This part is the preferred choice for new designs and ongoing procurement.

89140-0101 (3M Manufacturer Recommended Alternative): The 3M 89140-0101 provides cross-manufacturer compatibility with the same 40-position, dual-row, 0.100" pitch configuration and IDC termination method. The wire gauge specification (26-28 AWG) overlaps with the original part's range (28-30 AWG), ensuring functional compatibility with standard ribbon cable applications. This part is active and ROHS3 Compliant. The connector is available in higher inventory quantities and represents an alternative source for supply chain resilience.

Frequently Asked Questions (FAQ)

Q: Can the 66900-340LF be used as a direct replacement for the 66900-340?

A: Yes. The 66900-340LF is electrically and mechanically identical to the 66900-340. Both connectors feature 40 positions, 0.100" pitch, dual-row configuration, IDC termination, and gold contact finish. The primary difference is product status and compliance: 66900-340LF is active and RoHS Compliant.

Q: Is the 3M 89140-0101 compatible with systems designed for the 66900-340?

A: Yes. The 89140-0101 maintains the same connector type, position count, pitch spacing, row configuration, IDC termination method, and polarizing key features. The wire gauge specification (26-28 AWG) overlaps with the original part's range (28-30 AWG), ensuring compatibility with ribbon cable applications within the specified gauge range.

Q: What is the significance of the wire gauge difference between 66900-340 (28-30 AWG) and 89140-0101 (26-28 AWG)?

A: IDC connectors are designed to accommodate wire gauge variations within their specified ranges. The overlapping range (28 AWG) ensures that standard ribbon cables used with the original part will function correctly with the substitute. The 26 AWG capability of the 89140-0101 provides additional flexibility for applications using slightly heavier gauge ribbon cable.

Q: Are there packaging differences between these parts?

A: Yes. The 66900-340 packaging is not specified. The 66900-340LF is supplied in Tube packaging, while the 89140-0101 is supplied in Bulk packaging. Packaging selection may affect procurement quantities and handling procedures but does not impact electrical or mechanical compatibility.

Q: Which substitute part should be selected for new designs?

A: For new designs, the 66900-340LF is the recommended choice as it is the direct successor from the original manufacturer (Amphenol ICC), maintains identical specifications, and is RoHS Compliant. The 89140-0101 is suitable as an alternative source or for supply chain diversification.

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