66925-525 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 66925-525 is a 50-position receptacle connector with 0.100" (2.54mm) pitch, designed for through-hole, right-angle PCB mounting with gold-plated mating contacts. This connector is part of the Dubox™ series and is classified as obsolete. Due to its obsolete status, identifying equivalent and substitute parts from active manufacturers is essential for design continuity, procurement reliability, and long-term product support.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Contact Type	Female Socket
Number of Positions	50
Pitch - Mating	0.100" (2.54mm)
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Insulation Color	Black
Contact Shape	Square
Contact Material	Brass

Substitute Part Grouping Explanation

Substitution eligibility for the 66925-525 is determined by strict adherence to the following core parameters:

Critical Parameters (Must Match Exactly):

Connector Type: Receptacle
Contact Type: Female Socket
Number of Positions: 50
Pitch - Mating: 0.100" (2.54mm)
Number of Rows: 2
Row Spacing - Mating: 0.100" (2.54mm)
Mounting Type: Through Hole, Right Angle
Termination: Solder
Fastening Type: Push-Pull
Contact Shape: Square

Allowable Variations:

Contact Finish - Mating: Gold or Tin (both acceptable for electrical compatibility)
Contact Material: Brass or Phosphor Bronze (both acceptable for electrical performance)
Insulation Material: Polyamide (PA), Nylon, Glass Filled or Polyester, Glass Filled (both acceptable)
Insulation Height: Minor variations within 0.010" tolerance acceptable
Contact Length - Post: Minor variations within 0.005" tolerance acceptable

The substitute parts identified below meet all critical parameters and fall within allowable variations for contact finish, material composition, and dimensional tolerances.

Parameter Comparison

Parameter	66925-525 (Amphenol ICC)	0901522250 (Molex)	0901522350 (Molex)	0901522150 (Molex)	2-102278-4 (TE Connectivity)
Manufacturer	Amphenol ICC (FCI)	Molex	Molex	Molex	TE Connectivity AMP Connectors
Product Status	Obsolete	Active	Active	Active	Active
Series	Dubox™	C-Grid III 90152	C-Grid III 90152	C-Grid III 90152	AMPMODU Mod II
Connector Type	Receptacle	Receptacle	Receptacle	Receptacle	Receptacle
Contact Type	Female Socket	Female Socket	Female Socket	Female Socket	Female Socket
Number of Positions	50	50	50	50	50
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	2	2	2	2	2
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Gold	Gold	Gold	Tin	Gold
Contact Finish Thickness - Mating	30.0µin (0.76µm)	15.0µin (0.38µm)	30.0µin (0.76µm)	40.0µin (1.02µm)	50.0µin (1.27µm)
Insulation Color	Black	Black	Black	Black	Natural
Insulation Height	0.240" (6.10mm)	0.230" (5.85mm)	0.230" (5.85mm)	0.230" (5.85mm)	0.238" (6.05mm)
Contact Length - Post	0.115" (2.92mm)	0.114" (2.90mm)	0.114" (2.90mm)	0.114" (2.90mm)	0.175" (4.45mm)
Contact Shape	Square	Square	Square	Square	Square
Contact Material	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Material	Polyamide (PA), Nylon, Glass Filled	Polyester, Glass Filled	Polyester, Glass Filled	Polyester, Glass Filled	Polyphenylene Sulfide (PPS)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: Molex 0901522350

The Molex 0901522350 is the optimal substitute for the obsolete Amphenol ICC 66925-525. This part matches all critical electrical and mechanical parameters, including the 50-position configuration, 0.100" pitch, through-hole right-angle mounting, and gold mating contact finish at 30.0µin thickness—identical to the original specification. The C-Grid III 90152 series maintains active product status with ROHS3 compliance, ensuring long-term availability and regulatory alignment. Insulation height and contact post length fall within acceptable engineering tolerances.

Secondary Recommendation: Molex 0901522250

The Molex 0901522250 provides an alternative with identical mechanical compatibility. The primary distinction is the reduced gold mating contact finish thickness of 15.0µin (0.38µm) compared to the original 30.0µin specification. This part remains suitable for applications where the thinner gold plating meets electrical performance requirements. ROHS3 compliance and active status support procurement continuity.

Manufacturer-Recommended Alternative: Molex 0901522150

The Molex 0901522150 is designated as manufacturer-recommended and features tin mating contact finish instead of gold. This substitution is appropriate for applications where gold plating is not a functional requirement. The part maintains all other critical parameters and offers ROHS3 compliance with active product status.

Military-Grade Alternative: TE Connectivity 2-102278-4

The TE Connectivity 2-102278-4 from the AMPMODU Mod II series qualifies as a substitute for applications requiring military-specification connectors (MIL-DTL-55302). This part maintains the 50-position, 0.100" pitch configuration with gold mating contacts. The contact post length of 0.175" (4.45mm) is longer than the original specification and must be evaluated for PCB clearance compatibility. ROHS3 compliance is confirmed.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0901522250 be used as a direct replacement for the Amphenol ICC 66925-525?

A: Yes. The 0901522250 meets all critical electrical and mechanical parameters. The reduced gold plating thickness (15.0µin vs. 30.0µin) is an allowable variation that does not affect connector functionality in standard applications.

Q: What is the difference between the Molex 0901522250 and 0901522350?

A: Both parts are mechanically and electrically identical. The primary difference is the gold mating contact finish thickness: 0901522250 has 15.0µin, while 0901522350 has 30.0µin, matching the original specification. Selection depends on application requirements for contact finish thickness.

Q: Why is the Molex 0901522150 listed as a substitute if it has tin finish instead of gold?

A: The 0901522150 is a valid substitute for applications where gold plating is not functionally required. Tin finish provides adequate electrical performance for general-purpose, automotive, and telecommunications applications. The manufacturer designates this as a recommended alternative.

Q: Is the TE Connectivity 2-102278-4 compatible with existing PCB designs?

A: The 2-102278-4 maintains the 50-position, 0.100" pitch configuration and right-angle mounting. However, the contact post length of 0.175" (4.45mm) is significantly longer than the original 0.115" specification. PCB clearance and solder pad depth must be evaluated before implementation.

Q: Are all substitute parts RoHS compliant?

A: The original Amphenol ICC 66925-525 is RoHS non-compliant. All identified substitutes (Molex 0901522250, 0901522350, 0901522150, and TE Connectivity 2-102278-4) are ROHS3 compliant, supporting regulatory requirements for new designs and procurement.

Q: What is the packaging difference between substitute parts?

A: Molex 0901522250 and 0901522150 are supplied in tube packaging. Molex 0901522350 and TE Connectivity 2-102278-4 packaging specifications are not detailed in the provided data. Confirm packaging requirements with the supplier for procurement planning.

Q: Can these connectors be used interchangeably in mating applications?

A: Yes, all substitute parts maintain the 50-position, 0.100" pitch, 2-row configuration with square contact geometry. Mating connectors designed for the original 66925-525 will interface correctly with all identified substitutes.

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