Mill-Max 2551-2-00-80-00-00-07-0 Terminal Turret Connector - Equivalent & Substitute Parts

Part Overview

The Mill-Max 2551-2-00-80-00-00-07-0 is an active single-end turret terminal connector designed for through-hole mounting on printed circuit boards. This component features a tin contact finish and is manufactured from brass alloy with swage termination. The part is ROHS3 compliant and carries an MSL rating of 1 (Unlimited), indicating suitability for standard storage and handling conditions. Substitute parts may be required due to inventory availability, specific finish requirements, or design revision updates while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	2551-2-00-80-00-00-07-0
Series	2551
Terminal Type	Single End
Number of Turrets	Double
Length - Above Board	0.237" (6.02mm)
Mounting Type	Through Hole
Termination Method	Swage
Flange Diameter	0.125" (3.18mm)
Mounting Hole Diameter	0.094" (2.39mm)
Contact Material	Brass Alloy
Contact Finish	Tin
Board Thickness	0.062" (1.57mm)
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 2551-2-00-80-00-00-07-0 is determined by strict equivalence across the following critical parameters:

Series designation (2551)
Terminal type and configuration (Single End, Double Turrets)
Physical dimensions (Length above board: 0.237", Flange diameter: 0.125", Mounting hole diameter: 0.094")
Mounting methodology (Through Hole with Swage termination)
Base material composition (Brass Alloy contact material)
Compliance certifications (ROHS3, MSL 1)

The identified substitute part 2551-2-00-50-00-00-07-0 maintains equivalence across all critical mechanical and electrical parameters. The primary distinction lies in the contact finish specification: the main part features pure tin finish at 200.0µin thickness, while the substitute employs tin-lead finish at 300.0µin thickness. Both finishes are compatible with standard PCB assembly processes and meet ROHS3 compliance requirements.

Parameter Comparison

Parameter	2551-2-00-80-00-00-07-0 (Main)	2551-2-00-50-00-00-07-0 (Substitute)
Manufacturer	Mill-Max Manufacturing Corp.	Mill-Max Manufacturing Corp.
Series	2551	2551
Terminal Type	Single End	Single End
Number of Turrets	Double	Double
Length - Above Board	0.237" (6.02mm)	0.237" (6.02mm)
Length - Below Flange	0.105" (2.67mm)	0.105" (2.67mm)
Length - Overall	0.342" (8.69mm)	0.342" (8.69mm)
Mounting Type	Through Hole	Through Hole
Termination	Swage	Swage
Flange Diameter	0.125" (3.18mm)	0.125" (3.18mm)
Diameter - Turret Head	0.094" (2.39mm)	0.094" (2.39mm)
Mounting Hole Diameter	0.094" (2.39mm)	0.094" (2.39mm)
Board Thickness	0.062" (1.57mm)	0.062" (1.57mm)
Contact Material	Brass Alloy	Brass Alloy
Contact Finish	Tin	Tin-Lead
Contact Finish Thickness	200.0µin (5.08µm)	300.0µin (7.62µm)
Insulation	Non-Insulated	Non-Insulated
Product Status	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both the 2551-2-00-80-00-00-07-0 and 2551-2-00-50-00-00-07-0 maintain active product status with full ROHS3 compliance and REACH unaffected designation. Selection between these parts should be based on finish specification requirements and inventory availability. The tin finish (main part) and tin-lead finish (substitute part) are both suitable for standard PCB assembly environments. Both components carry MSL 1 rating, indicating no special moisture control requirements during storage or handling. The increased finish thickness of the substitute part (300.0µin versus 200.0µin) provides additional corrosion protection in certain applications.

Frequently Asked Questions (FAQ)

Q: Can the 2551-2-00-50-00-00-07-0 be used as a direct replacement for the 2551-2-00-80-00-00-07-0?

A: Yes. Both parts share identical mechanical dimensions, mounting specifications, and electrical characteristics. The primary difference is the contact finish composition and thickness. Both finishes are ROHS3 compliant and suitable for standard PCB assembly.

Q: What is the significance of the contact finish difference between these parts?

A: The main part features a pure tin finish at 200.0µin thickness, while the substitute uses tin-lead finish at 300.0µin thickness. Both finishes provide adequate electrical conductivity and corrosion resistance. The tin-lead finish offers slightly greater thickness, which may provide extended service life in high-cycle contact applications.

Q: Are there any compatibility concerns with PCB design or assembly processes?

A: No. Both parts utilize identical through-hole mounting specifications, flange diameters, and mounting hole dimensions. PCB footprints and assembly procedures remain unchanged between the two parts.

Q: What does the MSL 1 rating indicate for storage and handling?

A: MSL 1 (Unlimited) indicates these components have no moisture sensitivity restrictions. Standard storage conditions without specialized desiccant packaging or controlled humidity environments are acceptable.

Q: Are both parts suitable for lead-free assembly processes?

A: Both parts are ROHS3 compliant. The tin finish of the main part is inherently lead-free. The tin-lead finish of the substitute part contains lead but remains ROHS3 compliant under applicable exemptions for certain connector applications.

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