Amphenol ICC 71978-120 Rectangular Connector Header Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 71978-120 is a through-hole, right-angle rectangular connector header with 20 positions at 2.54mm pitch. This component is classified as obsolete, with 860 pieces currently in stock. The Quickie™ series header features shrouded 4-wall construction, press-fit and solder termination, and latch lock/eject hook fastening. Due to its obsolete status, direct substitution with active product alternatives is necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	71978-120
Manufacturer	Amphenol ICC (FCI)
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	20
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall
Contact Shape	Square
Contact Finish - Mating	Gold, GXT™
Contact Material	Phosphor Bronze
Insulation Material	Thermoplastic, Glass Filled
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 71978-120 is determined by the following critical parameters that must remain constant:

Connector type: Header
Contact type: Male Pin
Pitch - Mating: 0.100" (2.54mm)
Number of positions: 20
Number of rows: 2
Row spacing - Mating: 0.100" (2.54mm)
Mounting type: Through Hole, Right Angle
Shrouding: Shrouded - 4 Wall
Contact shape: Square
Material flammability rating: UL94 V-0
Moisture sensitivity level: 1 (Unlimited)

Substitute parts are grouped into two categories:

Category 1: Direct Amphenol ICC Substitutes The 71978-120LF is the active-status equivalent from Amphenol ICC, featuring identical electrical and mechanical specifications with RoHS compliance and improved contact finish specifications.

Category 2: HARTING SEK Series Substitutes HARTING 09185206901, 09185206903, 09185206903001, 09185206913, 09185207901, 09185207903, and 09185207913 provide functional equivalence with variations in contact length specifications, fastening type details, and insulation material composition (PBT vs. Thermoplastic). All maintain the core 20-position, 2.54mm pitch, right-angle, shrouded configuration.

Category 3: Vertical Mounting Alternative HARTING 09185207324 provides a vertical mounting orientation instead of right-angle, maintaining all other core specifications for applications requiring different PCB layout configurations.

Parameter Comparison

Parameter	71978-120	71978-120LF	09185206901	09185206903	09185206903001	09185206913	09185207901	09185207903	09185207913	09185207324
Manufacturer	Amphenol ICC	Amphenol ICC	HARTING	HARTING	HARTING	HARTING	HARTING	HARTING	HARTING	HARTING
Series	Quickie™	Quickie™	SEK	SEK	SEK	SEK	SEK	SEK	SEK	SEK
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active
Connector Type	Header	Header	Header	Header	Header	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Number of Positions	20	20	20	20	20	20	20	20	20	20
Number of Rows	2	2	2	2	2	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)	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	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Length - Mating	0.228" (5.80mm)	0.228" (5.80mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)
Contact Length - Post	0.114" (2.90mm)	0.114" (2.90mm)	0.177" (4.50mm)	0.114" (2.90mm)	0.114" (2.90mm)	0.114" (2.90mm)	0.177" (4.50mm)	0.114" (2.90mm)	0.114" (2.90mm)	0.114" (2.90mm)
Insulation Height	0.339" (8.61mm)	0.339" (8.61mm)	0.335" (8.51mm)	0.335" (8.51mm)	0.335" (8.51mm)	0.335" (8.51mm)	0.335" (8.51mm)	0.335" (8.51mm)	0.335" (8.51mm)	0.350" (8.89mm)
Contact Finish - Mating	Gold, GXT™	Gold, GXT™	Gold	Gold	—	Gold	Gold	Gold	Gold	Gold
Contact Finish - Post	—	Tin	Tin	Tin	—	Tin	Tin	Tin	Tin	Tin
Contact Material	Phosphor Bronze	Phosphor Bronze	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy
Insulation Material	Thermoplastic, Glass Filled	Thermoplastic, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled
Fastening Type	Latch Lock/Eject Hooks	Latch Lock/Eject Hooks	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks, Long	Latch Holder	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks, Short	Latch Holder
Features	Keying Slot	Keying Slot	Keying Slot, Mounting Flange	Keying Slot, Mounting Flange	Keying Slot, Mounting Flange	Keying Slot, Mounting Flange	Keying Slot, Mounting Flange	Keying Slot, Mounting Flange	Keying Slot, Mounting Flange	Keying Slot
Operating Temperature	—	—	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: 71978-120LF The Amphenol ICC 71978-120LF is the direct active-status replacement for the obsolete 71978-120. This part maintains identical electrical and mechanical specifications while providing RoHS compliance. The 71978-120LF is available in tube packaging with 1119 pieces in stock, making it the preferred choice for designs requiring continuity with the original Amphenol ICC Quickie™ series platform.

Secondary Recommendation: HARTING 09185206903 or 09185207903 For applications where HARTING SEK series compatibility is acceptable, the 09185206903 (tray packaging, 1176 pieces in stock) or 09185207903 (bulk packaging, 685 pieces in stock) provide functional equivalence with ROHS3 compliance and extended operating temperature range (-55°C to 125°C). Both parts feature identical 20-position, 2.54mm pitch, right-angle, shrouded configuration with 0.114" post length matching the original specification.

Alternative for Extended Post Length: HARTING 09185206901 or 09185207901 Applications requiring longer contact post length (0.177" / 4.50mm) should specify 09185206901 (bulk, 1004 pieces) or 09185207901 (bulk, 784 pieces). These parts maintain all other core specifications while providing additional post engagement depth.

Vertical Mounting Alternative: HARTING 09185207324 For PCB layouts requiring vertical header orientation instead of right-angle, the 09185207324 (tray packaging, 1750 pieces in stock) provides equivalent electrical specifications with vertical through-hole mounting. This part is suitable only for applications where mounting orientation can be modified.

Compliance Consideration: All substitute parts except 71978-120LF provide ROHS3 compliance. The 71978-120LF provides RoHS compliance. Original 71978-120 is RoHS non-compliant. For new designs subject to RoHS requirements, 71978-120LF or HARTING alternatives are mandatory.

Frequently Asked Questions (FAQ)

Q: Can I use HARTING parts as direct replacements for the Amphenol ICC 71978-120? A: HARTING 09185206903, 09185207903, 09185206913, and 09185207913 are functionally equivalent for the core 20-position, 2.54mm pitch, right-angle, shrouded header application. However, HARTING parts feature PBT insulation material versus the original thermoplastic, and include mounting flanges not present on the original. Mechanical fit and mounting hole patterns should be verified for your specific PCB design.

Q: What is the difference between the various HARTING fastening types (Long, Short, Latch Holder)? A: Fastening type refers to the mechanical locking mechanism. Long and Short variants of Latch Lock/Eject Hooks differ in hook length, affecting mating force and retention characteristics. Latch Holder provides a simpler retention mechanism. Selection depends on your mating connector type and required retention force specifications.

Q: Why does the 71978-120LF have different contact finish specifications than the original 71978-120? A: The 71978-120LF adds tin finish to the post contacts (78.7µin / 2.00µm thickness) for improved solderability, while maintaining the gold GXT™ mating surface finish. This is a manufacturing improvement that enhances solder joint reliability without affecting electrical performance.

Q: Are there packaging differences between substitute parts? A: Yes. The 71978-120LF is supplied in tube packaging. HARTING parts are available in bulk or tray packaging depending on part number. Packaging affects handling, storage, and pick-and-place automation compatibility. Verify packaging requirements for your assembly process.

Q: What is the significance of the contact length differences (0.228" vs. 0.240")? A: Contact length affects mating depth and engagement with receptacle contacts. The original 71978-120 specifies 0.228" mating contact length, while HARTING substitutes specify 0.240". This 0.012" difference may affect mating force and connector stack height. Verify compatibility with your mating receptacle design.

Q: Can I substitute the vertical-mount 09185207324 for the right-angle 71978-120? A: Only if your PCB layout can accommodate vertical header orientation. The 09185207324 maintains all electrical specifications but requires different mounting hole placement and clearance. This substitution requires PCB redesign and is not a direct mechanical replacement.

Q: What does RoHS3 compliance mean compared to RoHS compliance? A: RoHS3 (Directive 2015/863/EU) is the current RoHS standard with additional restricted substances compared to earlier RoHS versions. ROHS3 compliance ensures the part meets current European regulatory requirements. The original 71978-120 is RoHS non-compliant and should not be used in new designs subject to RoHS regulations.

Q: Are all substitute parts rated for the same operating temperature range? A: No. The original 71978-120 does not specify an operating temperature range. All HARTING substitutes are rated -55°C to 125°C. The 71978-120LF does not specify an operating temperature range. For applications requiring defined temperature ratings, HARTING parts provide explicit specifications.

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