Amphenol ICC 66900-150 50-Position Rectangular IDC Receptacle Connector

Part Overview

The Amphenol ICC 66900-150 is a 50-position rectangular receptacle connector designed for IDC (Insulation Displacement Contact) termination with ribbon cable. This connector features gold-plated contacts rated for 28-30 AWG wire and operates in a 2-row, 0.100" pitch configuration with feed-through capability. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring compatible connectivity solutions.

Key Parameters

Parameter	Value
Manufacturer Part Number	66900-150
Manufacturer	Amphenol ICC (FCI)
Category	Rectangular Connectors
Connector Type	Receptacle
Number of Positions	50
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, GXT™
Contact Finish Thickness	30.0µin (0.76µm)
Features	Feed Through
Mounting Type	Free Hanging (In-Line)
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 66900-150 is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

Connector type: Receptacle
Number of positions: 50
Pitch: 0.100" (2.54mm)
Number of rows: 2
Row spacing: 0.100" (2.54mm)
Cable termination: IDC
Mounting type: Free Hanging (In-Line)
Wire gauge compatibility: 26-30 AWG range (accommodates original 28-30 AWG specification)
Contact finish: Gold
Moisture sensitivity level: 1 (Unlimited)

Substitute Parts Identified:

Direct Amphenol ICC Equivalent: 66900-150LF (same manufacturer, active product status, RoHS compliant variant)
HARTING SEK Series: 09185506803, 09185507803 (50-position, 0.100" pitch, IDC termination, 26-28 AWG, feed-through with polarizing key)
TE Connectivity AMP-Latch Series: 1-1658620-0 (50-position, 0.100" pitch, IDC termination, 26-28 AWG, forked contact type)
3M 3000 Series: 3425-6050, 3425-7050 (50-position, 0.100" pitch, IDC termination, 26-30 AWG, strain relief features)
3M 891 Series: 89150-0001 (50-position, 0.100" pitch, IDC termination, 26-28 AWG, feed-through)

Parameter Comparison

Part Number	Manufacturer	Series	Positions	Pitch	Rows	Wire Gauge	Contact Type	Contact Finish	Features	Product Status	RoHS Status
66900-150	Amphenol ICC	Quickie™	50	0.100"	2	28-30 AWG	Female Socket	Gold, GXT™	Feed Through	Obsolete	Non-compliant
66900-150LF	Amphenol ICC	Quickie™	50	0.100"	2	28-30 AWG	Female Socket	Gold, GXT™	Feed Through	Active	Compliant
09185506803	HARTING	SEK	50	0.100"	2	26-28 AWG	Female Socket	Gold	Feed Through, Polarizing Key	Active	ROHS3 Compliant
09185507803	HARTING	SEK	50	0.100"	2	26-28 AWG	Female Socket	Gold	Feed Through, Polarizing Key	Active	ROHS3 Compliant
1-1658620-0	TE Connectivity	AMP-Latch	50	0.100"	2	26-28 AWG	Forked	Gold	Feed Through	Active	ROHS3 Compliant
3425-6050	3M	3000	50	0.100"	2	26-30 AWG	Female Socket	Gold	Feed Through, Strain Relief	Active	ROHS3 Compliant
3425-7050	3M	3000	50	0.100"	2	26-30 AWG	Female Socket	Gold	Closed End, Strain Relief	Active	ROHS3 Compliant
89150-0001	3M	891	50	0.100"	2	26-28 AWG	Female Socket	Gold	Feed Through	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: 66900-150LF (Amphenol ICC)

The 66900-150LF is the direct active equivalent of the obsolete 66900-150. It maintains identical electrical and mechanical specifications while achieving RoHS compliance and active product status. This part is available in tube packaging and represents the lowest-risk substitution path for existing designs.

Secondary Recommendations by Application Context:

For RoHS3 Compliance Requirement: 09185506803, 09185507803 (HARTING SEK Series), 1-1658620-0 (TE Connectivity), 3425-6050, 3425-7050 (3M 3000 Series), or 89150-0001 (3M 891 Series). All are ROHS3 compliant with active product status.

For Wire Gauge Flexibility (26-30 AWG): 3425-6050 or 3425-7050 (3M 3000 Series) accommodate the full 26-30 AWG range, matching the original specification exactly.

For Strain Relief Features: 3425-6050 (feed-through with strain relief) or 3425-7050 (closed-end with strain relief) provide mechanical reinforcement for high-vibration or high-flex applications.

For Polarizing Key Requirement: 09185506803 or 09185507803 (HARTING SEK Series) include polarizing keys for keyed mating applications.

For Contact Type Consideration: All substitutes except 1-1658620-0 feature female socket contacts matching the original. The 1-1658620-0 uses forked contacts, which may require mechanical validation in existing mating interfaces.

Frequently Asked Questions (FAQ)

Q: Can I use 66900-150LF as a direct replacement for 66900-150?

A: Yes. The 66900-150LF is electrically and mechanically identical to the 66900-150, with the primary differences being active product status and RoHS compliance. It is the recommended direct substitute.

Q: What is the difference between 3425-6050 and 3425-7050?

A: Both are 3M 3000 Series 50-position IDC receptacles with identical electrical specifications. The 3425-6050 features a feed-through design, while the 3425-7050 features a closed-end design. Selection depends on whether the connector must allow signal pass-through to additional stages.

Q: Are HARTING 09185506803 and 09185507803 interchangeable?

A: Both are HARTING SEK Series connectors with identical 50-position, 0.100" pitch, IDC termination, and 26-28 AWG specifications. They are functionally equivalent for the specified parameters.

Q: Why do some substitutes specify 26-28 AWG instead of 28-30 AWG?

A: Wire gauge specifications define the contact crimp range. A 26-28 AWG contact will reliably terminate 26, 27, and 28 AWG wire. The original 28-30 AWG specification terminates 28, 29, and 30 AWG wire. Substitutes rated 26-28 AWG will reliably terminate 28 AWG wire (the lower end of the original range) but not 29-30 AWG. For applications using 29-30 AWG ribbon cable, select substitutes rated 26-30 AWG (3425-6050, 3425-7050) or verify cable gauge compatibility.

Q: What is the significance of the "LF" suffix in 66900-150LF?

A: The "LF" suffix indicates lead-free solder compatibility and RoHS compliance. This is a manufacturing and environmental designation, not a functional change to the connector.

Q: Do all substitutes have the same contact finish thickness?

A: No. The original 66900-150 specifies 30.0µin (0.76µm) gold plating. The 1-1658620-0 specifies 15.0µin (0.38µm). HARTING parts do not specify contact finish thickness. For applications requiring specific contact resistance or wear characteristics, verify finish thickness with the manufacturer.

Q: Can I mix connectors from different manufacturers in the same system?

A: All listed substitutes meet the core 50-position, 0.100" pitch, IDC termination specification and are mechanically compatible for mating. However, contact geometry, finish thickness, and feature variations (polarizing keys, strain relief) may affect performance in specific applications. Validate mechanical fit and electrical performance in your application before production deployment.

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