TE Connectivity 8-440129-4 Equivalent & Substitute Parts

Part Overview

The TE Connectivity 8-440129-4 is a 4-position rectangular connector receptacle housing with 2.00mm pitch, designed for free-hanging in-line applications. This component belongs to the High Performance Interconnect (HPI) series and features crimp-style female socket contacts housed in red thermoplastic insulation material. The part maintains Active product status and is RoHS Compliant with MSL 1 rating.

Substitute parts are identified when equivalent rectangular connector housings share identical electrical and mechanical specifications, including connector type, contact configuration, pitch, mounting style, and contact termination method. Alternative models may be required due to color availability, material composition, operating temperature range extensions, or manufacturer preference in procurement workflows.

Key Parameters

Parameter	Specification
Manufacturer Part Number	8-440129-4
Manufacturer	TE Connectivity AMP Connectors
Category	Rectangular Connectors
Connector Type	Receptacle
Contact Type	Female Socket
Number of Positions	4
Pitch	0.079" (2.00mm)
Number of Rows	1
Mounting Type	Free Hanging (In-Line)
Contact Termination	Crimp
Color	Red
Insulation Material	Thermoplastic
Operating Temperature	-25°C ~ 85°C
RoHS Status	RoHS Compliant
MSL Rating	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for rectangular connector housings is determined by strict equivalence across the following core parameters:

Mandatory Matching Parameters:

Connector Type: Receptacle
Contact Type: Female Socket
Number of Positions: 4
Pitch: 0.079" (2.00mm)
Number of Rows: 1
Mounting Type: Free Hanging (In-Line)
Contact Termination: Crimp

Variable Parameters (Allow Substitution):

Color: Red, Natural, or Black
Insulation Material: Thermoplastic, Polyamide (PA66), or Polybutylene Terephthalate (PBT)
Operating Temperature Range: May extend beyond the main part specification
Manufacturer: TE Connectivity, Hirose Electric, or Harwin
Series: HPI, CT, or A4/M22

All identified substitute parts maintain identical electrical and mechanical form factors while offering variations in material composition, color coding, and thermal performance characteristics.

Parameter Comparison

Part Number	Manufacturer	Series	Color	Insulation Material	Operating Temperature	RoHS Status	Product Status
8-440129-4	TE Connectivity	HPI	Red	Thermoplastic	-25°C ~ 85°C	RoHS Compliant	Active
175778-4	TE Connectivity	CT	Natural	Polyamide (PA66)	-30°C ~ 105°C	RoHS Compliant	Active
179228-4	TE Connectivity	CT	Natural	Polyamide (PA66)	-55°C ~ 85°C	RoHS Compliant	Active
440129-4	TE Connectivity	HPI	Natural	Thermoplastic	-25°C ~ 105°C	RoHS Compliant	Active
6-179228-4	TE Connectivity	CT	Black	Polyamide (PA66)	-65°C ~ 105°C	ROHS3 Compliant	Active
6-440129-4	TE Connectivity	HPI	Black	Thermoplastic	-25°C ~ 85°C	RoHS Compliant	Active
A4B-4S-2C	Hirose Electric Co Ltd	A4	Black	Polybutylene Terephthalate (PBT)	-55°C ~ 85°C	ROHS3 Compliant	Active
M22-3010400	Harwin Inc.	M22	Black	Thermoplastic	-25°C ~ 85°C	ROHS3 Compliant	Active
M22-3070400	Harwin Inc.	M22	Natural	Thermoplastic	-25°C ~ 85°C	ROHS3 Compliant	Active

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and comply with RoHS regulations. Selection among equivalent options is determined by application-specific requirements:

TE Connectivity HPI Series (8-440129-4, 440129-4, 6-440129-4): These parts share identical thermoplastic insulation material and HPI series designation. The 440129-4 variant extends the upper operating temperature limit to 105°C while maintaining the same -25°C lower bound. Color differentiation (red, natural, black) allows for circuit identification or assembly workflow requirements without affecting electrical performance.

TE Connectivity CT Series (175778-4, 179228-4, 6-179228-4): These parts utilize polyamide (PA66) insulation material, offering enhanced thermal stability. The 175778-4 variant provides the widest operating temperature range (-30°C ~ 105°C). The 6-179228-4 variant achieves the lowest temperature rating (-65°C ~ 105°C) and carries ROHS3 Compliant certification with REACH Unaffected status.

Cross-Manufacturer Alternatives (A4B-4S-2C, M22-3010400, M22-3070400): Hirose Electric A4B-4S-2C employs polybutylene terephthalate (PBT) insulation with -55°C ~ 85°C operating range and ROHS3 compliance. Harwin M22 series options provide thermoplastic insulation with identical temperature performance to the main part and ROHS3 certification.

Frequently Asked Questions (FAQ)

Q: Can 8-440129-4 be directly replaced with 440129-4?

A: Yes. Both parts are TE Connectivity HPI series 4-position receptacles with 2.00mm pitch, crimp termination, and thermoplastic insulation. The primary difference is color (red versus natural) and extended upper operating temperature (85°C versus 105°C). Direct substitution is valid when color coding is not a circuit identification requirement and the application operates within -25°C ~ 85°C.

Q: What is the difference between thermoplastic and polyamide insulation materials in these connectors?

A: Insulation material affects thermal performance and mechanical properties. Thermoplastic insulation (used in HPI and M22 series) operates to 85°C or 105°C depending on the specific part. Polyamide (PA66) insulation (used in CT series) provides enhanced thermal stability, supporting operation to 105°C in most variants. Material selection does not affect electrical compatibility or crimp contact performance.

Q: Are Hirose A4B-4S-2C and Harwin M22 series parts compatible with TE Connectivity connectors?

A: Yes. All substitute parts share identical electrical and mechanical specifications: 4-position receptacle, 2.00mm pitch, female socket contacts, crimp termination, and free-hanging in-line mounting. Cross-manufacturer substitution is valid when connector housing form factor and contact interface are the primary compatibility criteria. Verify mating plug compatibility with the specific application.

Q: Which substitute part offers the widest operating temperature range?

A: The TE Connectivity 6-179228-4 (CT series, polyamide insulation, black color) operates from -65°C to 105°C, providing the lowest minimum temperature and highest maximum temperature among all listed options. This part also carries ROHS3 Compliant and REACH Unaffected certifications.

Q: Does color variation affect electrical performance or substitution eligibility?

A: No. Color (red, natural, or black) is a visual identification feature only and does not affect electrical performance, contact resistance, or mechanical compatibility. Color selection is determined by circuit identification requirements or assembly workflow preferences.

Q: What does MSL 1 (Unlimited) rating mean for these connectors?

A: MSL 1 indicates Moisture Sensitivity Level 1, meaning the component has unlimited shelf life and requires no special moisture control during storage or handling. This applies to all listed substitute parts and the main part.

Q: Can these connector housings be used interchangeably in the same assembly?

A: Yes, provided the mating plug connector is compatible with the 2.00mm pitch and 4-position configuration. All substitute parts maintain identical housing form factors and contact spacing. Verify that the specific plug connector model is rated for use with the selected housing manufacturer and series.

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