Amphenol ICC 75844-140-36 Rectangular Connector Header — Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 75844-140-36 is a vertical rectangular connector header featuring 36 positions at 2.54mm pitch, designed for through-hole board-to-board or cable applications. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The BERGSTIK® series header utilizes solder termination with push-pull fastening and unshrouded design, suitable for applications requiring standard 0.100" spacing connectivity.

Key Parameters

Parameter	Value
Manufacturer Part Number	75844-140-36
Manufacturer	Amphenol ICC (FCI)
Category	Rectangular Connectors
Series	BERGSTIK®
Product Status	Obsolete
Connector Type	Header, Breakaway
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	36
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Contact Shape	Square
Contact Material	Phosphor Bronze
Insulation Material	Thermoplastic
Material Flammability Rating	UL94 V-0
Insulation Color	Black
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 75844-140-36 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Core Compatibility Parameters:

Pitch - Mating: 0.100" (2.54mm) — exact match required
Number of Positions: 36 — exact match required
Number of Rows: 2 — exact match required
Row Spacing - Mating: 0.100" (2.54mm) — exact match required
Connector Type: Header — exact match required
Contact Type: Male Pin — exact match required
Mounting Type: Through Hole — exact match required
Termination: Solder — exact match required
Fastening Type: Push-Pull — exact match required
Contact Shape: Square — exact match required
Material Flammability Rating: UL94 V-0 — exact match required

Secondary Parameters (Allowable Variation):

Contact Length - Mating: 0.318" (8.08mm) to 0.405" (10.29mm) — acceptable range for board-to-board spacing
Contact Length - Post: 0.110" (2.79mm) to 0.710" (18.03mm) — application-dependent selection
Overall Contact Length: varies with post length
Contact Finish - Mating: Gold or Tin-Lead or Tin — acceptable alternatives
Contact Material: Phosphor Bronze or Copper Alloy — acceptable alternatives
Insulation Material: Thermoplastic, PBT, or PCT — acceptable alternatives
RoHS Status: Compliant or non-compliant — application-dependent
REACH Status: Affected or Unaffected — application-dependent

Substitute parts from 3M (929710 and 929715 series) and Amphenol ICC (75844-140-36LF) meet all core compatibility parameters while offering variations in contact finish, insulation material, and regulatory compliance to support different application requirements.

Parameter Comparison

Parameter	75844-140-36 (Main)	75844-140-36LF	929710-01-18	929710-01-18-RK	929710-06-18-RK	929710-10-18	929710-10-18-RK	929710-11-18	929710-11-18-RK	929715-01-18-EU	929715-01-18-I
Manufacturer	Amphenol ICC	Amphenol ICC	3M	3M	3M	3M	3M	3M	3M	3M	3M
Product Status	Obsolete	Active	Discontinued at DiGi Electronics	Active	Active	Discontinued at DiGi Electronics	Active	Active	Active	Active	Active
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)	0.100" (2.54mm)
Number of Positions	36	36	36	36	36	36	36	36	36	36	36
Number of Rows	2	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)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Length - Mating	0.405" (10.29mm)	0.405" (10.29mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)	0.318" (8.08mm)
Contact Length - Post	0.120" (3.05mm)	0.120" (3.05mm)	0.110" (2.79mm)	0.110" (2.79mm)	0.710" (18.03mm)	0.175" (4.45mm)	0.175" (4.45mm)	0.125" (3.18mm)	0.125" (3.18mm)	0.110" (2.79mm)	0.110" (2.79mm)
Contact Finish - Mating	Gold, GXT™	Gold, GXT™	Tin-Lead	Tin	Tin	Tin-Lead	Tin	Tin-Lead	Tin	Gold	Gold
Contact Finish Thickness - Mating	30.0µin (0.76µm)	30.0µin (0.76µm)	100.0µin (2.54µm)	200.0µin (5.08µm)	200.0µin (5.08µm)	100.0µin (2.54µm)	200.0µin (5.08µm)	100.0µin (2.54µm)	200.0µin (5.08µm)	10.0µin (0.25µm)	10.0µin (0.25µm)
Contact Material	Phosphor Bronze	Phosphor Bronze	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy
Insulation Material	Thermoplastic	Thermoplastic	PBT, Polyester, Glass Filled	PCT	PCT	PBT, Polyester, Glass Filled	PCT	PBT, Polyester, Glass Filled	PCT	PCT	PBT, Polyester, Glass Filled
Operating Temperature	Not specified	Not specified	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Current Rating (Amps)	Not specified	Not specified	2.5A	2.5A	2.5A	2.5A	2.5A	2.5A	2.5A	2.5A	2.5A
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	UL94 V-0
RoHS Status	RoHS non-compliant	RoHS Compliant	RoHS non-compliant	RoHS Compliant	RoHS Compliant	RoHS non-compliant	RoHS Compliant	RoHS non-compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Applicable	Not Applicable	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: 75844-140-36LF (Amphenol ICC)

The 75844-140-36LF is the direct successor to the obsolete 75844-140-36, maintaining identical mechanical and electrical specifications while achieving RoHS compliance. This part is the preferred choice for new designs and production continuity, as it eliminates the need for design modification while meeting current regulatory requirements. Active product status ensures long-term availability and supply chain stability.

Secondary Recommendations: 3M 929710 and 929715 Series

The 3M 929710 and 929715 series headers provide functionally equivalent alternatives with the following considerations:

929710-01-18-RK, 929710-10-18-RK, 929710-11-18-RK: RoHS-compliant variants with tin contact finish and PCT insulation material. These parts accommodate varying post lengths (0.110", 0.175", 0.125") for different board thickness applications. Active product status supports long-term procurement.
929710-06-18-RK: Extended post length (0.710") for applications requiring deeper board penetration or stacking configurations.
929715-01-18-EU, 929715-01-18-I: Gold-plated contact finish alternatives with RoHS compliance. The 929715-01-18-EU uses PCT insulation (REACH Unaffected), while 929715-01-18-I uses PBT insulation (REACH Unaffected). These variants provide enhanced corrosion resistance for high-reliability applications.

Regulatory Compliance Considerations:

Applications requiring RoHS compliance must use 75844-140-36LF or 3M parts with "-RK" designation or 929715 series.
Applications with REACH-sensitive supply chains should prioritize 929710-01-18-RK, 929710-10-18-RK, 929710-11-18-RK, 929715-01-18-EU, or 929715-01-18-I.
Legacy systems tolerating non-compliant components may continue using 75844-140-36 stock until depletion, then transition to 75844-140-36LF.

Contact Length Selection:

Post length selection depends on PCB thickness and mating connector depth:

0.110" (2.79mm) post: Standard thin PCB applications
0.120" (3.05mm) post: Original specification match (75844-140-36, 75844-140-36LF)
0.125" (3.18mm) post: Slight variation for standard PCB thickness
0.175" (4.45mm) post: Thicker PCB or extended reach applications
0.710" (18.03mm) post: Stacking or deep board penetration

Frequently Asked Questions (FAQ)

Q: Can I directly replace 75844-140-36 with 75844-140-36LF?

A: Yes. The 75844-140-36LF is the direct successor with identical mechanical and electrical specifications. The primary difference is RoHS compliance. No design modification is required.

Q: What is the difference between 3M 929710 and 929715 series?

A: The 929710 series uses tin or tin-lead contact finish, while the 929715 series uses gold contact finish. Gold plating provides enhanced corrosion resistance and is suitable for high-reliability or harsh environment applications. Both series maintain identical pitch, position count, and mounting specifications.

Q: Why do 3M parts have different post lengths?

A: Post length determines how far the contact extends into the mating connector. Selection depends on PCB thickness and the depth of the mating connector cavity. Verify your PCB thickness and mating connector specifications before selecting post length.

Q: Are all substitute parts RoHS compliant?

A: No. The original 75844-140-36 and 3M 929710-01-18, 929710-10-18, and 929710-11-18 are RoHS non-compliant. RoHS-compliant alternatives include 75844-140-36LF, 929710-01-18-RK, 929710-10-18-RK, 929710-11-18-RK, 929710-06-18-RK, 929715-01-18-EU, and 929715-01-18-I.

Q: What does the "-RK" suffix indicate on 3M parts?

A: The "-RK" suffix indicates RoHS compliance and typically denotes tin contact finish with improved plating thickness (200.0µin vs. 100.0µin) compared to non-RK variants.

Q: Can I use 929715-01-18-EU and 929715-01-18-I interchangeably?

A: Mechanically and electrically, yes. The primary difference is insulation material: 929715-01-18-EU uses PCT (REACH Unaffected), while 929715-01-18-I uses PBT (REACH Unaffected). Both provide identical performance. Selection depends on supply chain and regulatory requirements specific to your application region.

Q: What is the contact length difference between the main part and 3M substitutes?

A: The original 75844-140-36 has a mating contact length of 0.405" (10.29mm), while 3M 929710 and 929715 series have 0.318" (8.08mm). This difference may affect mating depth with certain connector designs. Verify compatibility with your mating connector specifications.

Q: Are there any electrical performance differences between substitute parts?

A: All substitute parts maintain identical pitch, position count, and fastening specifications. The 3M parts specify 2.5A current rating and -40°C to 105°C operating temperature, while the original part does not specify these values. For applications requiring specific electrical performance, consult detailed datasheets.

Q: Which substitute should I choose for new production?

A: For new designs, use 75844-140-36LF (direct successor) or 929710-01-18-RK / 929710-11-18-RK (3M alternatives with RoHS compliance and active product status). Both ensure long-term availability and regulatory compliance.

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