Amphenol ICC 71991-840 Rectangular Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 71991-840 is an 80-position receptacle connector from the Dubox™ series, designed for board-to-board applications with 0.100" (2.54mm) pitch through-hole mounting. This connector features gold-plated mating contacts and tin-plated posts, suitable for automotive, industrial, telecommunications, and general-purpose applications.

The 71991-840 carries an obsolete product status. Identifying equivalent substitute parts ensures design continuity and maintains supply chain reliability for legacy systems and ongoing production requirements.

Key Parameters

Parameter	Value
Connector Type	Receptacle, Bottom or Top Entry
Number of Positions	80
Pitch - Mating	0.100" (2.54mm)
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Contact Type	Female Socket
Contact Finish - Mating	Gold (15.0µin / 0.38µm)
Contact Finish - Post	Tin (78.7µin / 2.00µm)
Insulation Material	Thermoplastic, Glass Filled
Material Flammability Rating	UL94 V-0
Mated Stacking Height	11.04mm

Substitute Part Grouping Explanation

Substitution eligibility for the 71991-840 is determined by strict equivalence across the following critical parameters:

Connector geometry: 80 positions, 2 rows, 0.100" (2.54mm) pitch and row spacing
Contact configuration: Female socket, receptacle type with bottom or top entry capability
Electrical interface: Gold mating contact finish (15.0µin thickness) and tin post finish (78.7µin thickness)
Mechanical mounting: Through-hole solder termination with push-pull fastening
Material compliance: Thermoplastic glass-filled insulation with UL94 V-0 rating
Physical dimensions: Insulation height 0.275" (6.99mm), contact post length 0.118" (3.00mm), mated stacking height 11.04mm

The substitute part 71991-840LF maintains identical electrical and mechanical specifications while differing in product status and regulatory compliance.

Parameter Comparison

Parameter	71991-840 (Main Part)	71991-840LF (Substitute)
Manufacturer	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Series	Dubox™	Dubox™
Connector Type	Receptacle, Bottom or Top Entry	Receptacle, Bottom or Top Entry
Number of Positions	80	80
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	2	2
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole
Contact Type	Female Socket	Female Socket
Contact Finish - Mating	Gold (15.0µin / 0.38µm)	Gold (15.0µin / 0.38µm)
Contact Finish - Post	Tin (78.7µin / 2.00µm)	Tin (78.7µin / 2.00µm)
Insulation Material	Thermoplastic, Glass Filled	Thermoplastic, Glass Filled
Material Flammability Rating	UL94 V-0	UL94 V-0
Insulation Height	0.275" (6.99mm)	0.275" (6.99mm)
Contact Length - Post	0.118" (3.00mm)	0.118" (3.00mm)
Mated Stacking Height	11.04mm	11.04mm
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS Compliant
Packaging	Not specified	Tube
Inventory Status	711 Pcs New Original In Stock	897 Pcs New Original In Stock

Engineering Selection Recommendations

The 71991-840LF serves as the direct substitute for the obsolete 71991-840. Both parts are electrically and mechanically identical across all specified parameters, ensuring pin-for-pin and form-factor compatibility.

The primary distinction is regulatory compliance: the 71991-840LF carries RoHS Compliant status, whereas the 71991-840 is RoHS non-compliant. For new designs or applications subject to RoHS directives, the 71991-840LF is the appropriate selection. For legacy systems where RoHS compliance is not a requirement, either part satisfies the electrical and mechanical interface specifications.

The 71991-840LF is currently in active production with higher inventory availability (897 pcs vs. 711 pcs), providing superior supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Are the 71991-840 and 71991-840LF mechanically interchangeable?

A: Yes. Both connectors share identical dimensions, contact geometry, pitch, row spacing, mounting type, and fastening mechanism. They are direct mechanical substitutes with no modification required for PCB layout or mating connector design.

Q: What is the difference between these two part numbers?

A: The primary differences are product status and RoHS compliance. The 71991-840 is obsolete and RoHS non-compliant, while the 71991-840LF is active production and RoHS Compliant. All electrical and mechanical specifications are identical.

Q: Can I use the 71991-840LF in a design originally specified for the 71991-840?

A: Yes. The 71991-840LF is a direct equivalent with identical contact finish specifications, insulation material, flammability rating, and dimensional characteristics. No design changes are necessary.

Q: Does packaging differ between these parts?

A: The 71991-840LF is supplied in tube packaging. The 71991-840 packaging specification is not provided in the technical data.

Q: Which part should I specify for new designs?

A: The 71991-840LF is the appropriate choice for new designs. It maintains active production status and RoHS compliance, ensuring long-term supply availability and regulatory alignment.

Q: Are both parts suitable for automotive and industrial applications?

A: Yes. Both connectors are rated for automotive, general-purpose, industrial, and telecommunications applications with UL94 V-0 material flammability certification.

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