Molex 0878312621 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The Molex 0878312621 is an active-status rectangular connector header designed for through-hole mounting applications. This shrouded, 26-position header with 2.00mm pitch serves board-to-board and cable interconnection in automotive, general purpose, and telecommunications applications. Substitute parts are identified to address inventory availability, lead time requirements, or specific application constraints while maintaining electrical and mechanical compatibility within the Milli-Grid 87831 series ecosystem.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	26
Number of Rows	2
Pitch - Mating	0.079" (2.00mm)
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Through Hole
Termination	Solder
Shrouding	Shrouded - 4 Wall
Current Rating	2A
Voltage Rating	125V
Operating Temperature	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0878312621 is determined by strict equivalence in the following critical parameters:

Connector Type & Contact Configuration: Header with male pins
Position Count & Row Configuration: 26 positions in 2-row arrangement
Pitch Specification: 0.079" (2.00mm) mating pitch and row spacing
Mounting & Termination: Through-hole solder termination
Shrouding: 4-wall shrouded design with keying slot
Electrical Ratings: Minimum 2A current and 125V voltage capability
Environmental Compliance: UL94 V-0 flammability rating, RoHS compliance

The substitute parts listed below meet these core requirements. Variations in contact finish thickness, insulation material composition, and fastening mechanism (latch holder vs. detent lock) are permissible within the scope of board-to-board and cable interconnection applications, provided the mating interface and electrical performance remain functionally equivalent.

Parameter Comparison

Parameter	Molex 0878312621	Molex 0878312620	Amphenol ICC 10075025-G01-26ULF	Amphenol ICC 98414-G06-26LF
Manufacturer	Molex	Molex	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Series	Milli-Grid 87831	Milli-Grid 87831	Minitek® 2.00mm	Minitek® 2.00mm
Number of Positions	26	26	26	26
Number of Rows	2	2	2	2
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Row Spacing - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Connector Type	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Fastening Type	Latch Holder	Latch Holder	Detent Lock	Latch Holder
Contact Length - Mating	0.141" (3.60mm)	0.141" (3.60mm)	0.157" (4.00mm)	0.157" (4.00mm)
Contact Length - Post	0.098" (2.50mm)	0.098" (2.50mm)	0.079" (2.00mm)	0.098" (2.50mm)
Insulation Height	0.252" (6.40mm)	0.252" (6.40mm)	0.220" (5.60mm)	0.232" (5.90mm)
Contact Finish - Mating	Gold	Gold	Gold, GXT™	Gold, GXT™
Contact Finish Thickness - Mating	30.0µin (0.76µm)	15.0µin (0.38µm)	30.0µin (0.76µm)	30.0µin (0.76µm)
Contact Material	Phosphor Bronze	Phosphor Bronze	Copper Alloy	Copper Alloy
Insulation Material	Polyamide (PA), Nylon, Glass Filled	Polyamide (PA), Nylon, Glass Filled	Thermoplastic	Thermoplastic
Current Rating	2A	2A	2A (AC/DC)	2A (AC/DC)
Voltage Rating	125V	125V	200V (AC/DC)	200V (AC/DC)
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	Not specified	Not specified
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant
Packaging	Tube	Tube	Tube	Bulk
Inventory Status	1150 Pcs New Original In Stock	4183 Pcs New Original In Stock	848 Pcs New Original In Stock	2392 Pcs New Original In Stock

Engineering Selection Recommendations

Molex 0878312620 is the primary substitute within the Milli-Grid 87831 series. This part maintains identical mechanical and electrical specifications to the 0878312621, with the exception of reduced gold contact finish thickness on the mating surface (15.0µin vs. 30.0µin). Both parts carry ROHS3 compliance and active product status. Selection of 0878312620 is appropriate for applications where the specified gold finish thickness differential does not impact contact reliability or corrosion resistance requirements.

Amphenol ICC 10075025-G01-26ULF and 98414-G06-26LF represent cross-manufacturer alternatives from the Minitek® 2.00mm series. Both parts satisfy the core electrical and mechanical requirements: 26-position, 2-row configuration with 2.00mm pitch, through-hole solder termination, and 4-wall shrouding. These parts offer higher voltage rating (200V vs. 125V) and are RoHS compliant. The Amphenol ICC parts employ thermoplastic insulation and copper alloy contacts, differing from the phosphor bronze contacts and glass-filled nylon insulation of the Molex parts. Contact length variations (4.00mm mating vs. 3.60mm) and insulation height differences are within acceptable tolerance for standard board-to-board interconnection. The 10075025-G01-26ULF features detent lock fastening, while 98414-G06-26LF uses latch holder fastening. Selection between these alternatives depends on specific PCB layout constraints and fastening mechanism preference.

Packaging Consideration: Molex parts are supplied in tube packaging; Amphenol ICC 10075025-G01-26ULF is tube-packaged, while 98414-G06-26LF is bulk-packaged. Procurement and handling procedures may differ accordingly.

Frequently Asked Questions (FAQ)

Q: Can Molex 0878312620 be used as a direct replacement for Molex 0878312621?

A: Yes. Both parts are from the Milli-Grid 87831 series with identical position count, pitch, row spacing, mounting type, and electrical ratings. The primary difference is the gold contact finish thickness on the mating surface (15.0µin vs. 30.0µin). For standard applications, this variation does not affect functional compatibility.

Q: Are Amphenol ICC Minitek® parts compatible with Molex Milli-Grid headers?

A: Amphenol ICC 10075025-G01-26ULF and 98414-G06-26LF are mechanically and electrically compatible for board-to-board interconnection. Both maintain the 26-position, 2-row configuration with 0.079" (2.00mm) pitch and row spacing. Mating interface geometry is equivalent. However, minor variations in contact length and insulation height exist. Verification of PCB footprint compatibility and connector cavity alignment is required before implementation.

Q: What is the difference between latch holder and detent lock fastening?

A: Latch holder fastening (Molex 0878312621, 0878312620, and Amphenol ICC 98414-G06-26LF) uses a mechanical latch mechanism for mated connector retention. Detent lock fastening (Amphenol ICC 10075025-G01-26ULF) employs a detent mechanism for positive locking. Both mechanisms provide secure mating; selection depends on application-specific requirements for mating force and unmating procedure.

Q: Are all substitute parts RoHS compliant?

A: Yes. Molex 0878312621 and 0878312620 are ROHS3 compliant. Amphenol ICC 10075025-G01-26ULF and 98414-G06-26LF are RoHS compliant. All parts meet regulatory requirements for restricted substance elimination.

Q: What is the significance of the contact finish thickness difference?

A: Contact finish thickness affects corrosion resistance and contact durability over extended mating cycles. Molex 0878312621 specifies 30.0µin (0.76µm) gold finish thickness, providing enhanced protection. Molex 0878312620 specifies 15.0µin (0.38µm), which is thinner but remains within acceptable limits for general-purpose and telecommunications applications. Amphenol ICC parts specify 30.0µin (0.76µm) with GXT™ enhanced gold plating. Selection should consider environmental exposure and mating cycle frequency.

Q: Can these connectors be used in automotive applications?

A: Molex 0878312621 and 0878312620 are explicitly rated for automotive applications. Amphenol ICC parts do not specify automotive applications in the provided data. Verification of automotive qualification and compliance with relevant automotive standards (AEC-Q200, ISO 16750) is required before automotive implementation of Amphenol ICC alternatives.

Q: What is the difference in operating temperature specification?

A: Molex 0878312621 and 0878312620 specify operating temperature range of -55°C to 105°C. Amphenol ICC 10075025-G01-26ULF and 98414-G06-26LF do not provide operating temperature specifications in the available data. For applications requiring defined temperature performance, Molex parts provide explicit thermal ratings.

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