TE Connectivity 174921-7 Rectangular Connector Plug Housing Equivalent & Substitute Parts

Part Overview

The TE Connectivity 174921-7 is a 3-position rectangular connector plug housing from the Multi-Lock series, designed for free-hanging in-line applications with crimp contact termination. This connector housing features a yellow polybutylene terephthalate (PBT) insulation body and operates across a temperature range of -30°C to 105°C. The part is currently active in production status with 1111 pieces available in new original inventory. Substitute parts are identified to provide alternative color options and packaging configurations while maintaining identical electrical and mechanical specifications, enabling flexibility in component sourcing and assembly requirements.

Key Parameters

Parameter	Specification
Manufacturer Part Number	174921-7
Manufacturer	TE Connectivity AMP Connectors
Category	Rectangular Connectors
Series	Multi-Lock
Connector Type	Plug
Contact Type	Female Socket
Number of Positions	3
Pitch	0.138" (3.50mm)
Number of Rows	1
Mounting Type	Free Hanging (In-Line)
Contact Termination	Crimp
Fastening Type	Latch Holder
Insulation Material	Polybutylene Terephthalate (PBT)
Operating Temperature Range	-30°C to 105°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)
RoHS Status	RoHS Compliant
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS Code	8538.90.6000
Base Product Number	174921
Product Status	Active
Packaging	Bulk

Substitute Part Grouping Explanation

Substitute parts for the TE Connectivity 174921-7 are determined by strict equivalence across all critical electrical and mechanical parameters. The substitution logic is based on the following key parameters that must remain identical:

Critical Equivalence Parameters:

Connector Type: Plug
Contact Type: Female Socket
Number of Positions: 3
Pitch: 0.138" (3.50mm)
Number of Rows: 1
Mounting Type: Free Hanging (In-Line)
Contact Termination: Crimp
Fastening Type: Latch Holder
Insulation Material: Polybutylene Terephthalate (PBT)
Operating Temperature Range: -30°C to 105°C
Series: Multi-Lock
Base Product Number: 174921

Variable Parameter (Non-Critical for Substitution):

Color: Yellow (174921-7), White (174921-1, 1-174921-1), Black (174921-2)

All identified substitute parts maintain identical functional specifications and differ only in housing color. This allows for direct substitution in applications where color coding is not a functional requirement or where alternative color designations are acceptable for circuit identification purposes.

Parameter Comparison

Parameter	174921-7 (Main)	174921-1	1-174921-1	174921-2
Manufacturer	TE Connectivity AMP Connectors	TE Connectivity AMP Connectors	TE Connectivity AMP Connectors	TE Connectivity AMP Connectors
Series	Multi-Lock	Multi-Lock	Multi-Lock	Multi-Lock
Connector Type	Plug	Plug	Plug	Plug
Contact Type	Female Socket	Female Socket	Female Socket	Female Socket
Number of Positions	3	3	3	3
Pitch	0.138" (3.50mm)	0.138" (3.50mm)	0.138" (3.50mm)	0.138" (3.50mm)
Number of Rows	1	1	1	1
Mounting Type	Free Hanging (In-Line)	Free Hanging (In-Line)	Free Hanging (In-Line)	Free Hanging (In-Line)
Contact Termination	Crimp	Crimp	Crimp	Crimp
Fastening Type	Latch Holder	Latch Holder	Latch Holder	Latch Holder
Insulation Material	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)
Operating Temperature Range	-30°C to 105°C	-30°C to 105°C	-30°C to 105°C	-30°C to 105°C
Color	Yellow	White	White	Black
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	RoHS Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	Vendor Undefined	REACH Unaffected
ECCN	EAR99	EAR99	EAR99	EAR99
HTSUS Code	8538.90.6000	8538.90.6000	8538.90.6000	8538.90.6000
Product Status	Active	Active	Active	Active
Inventory (Pcs)	1111	2380	3200	1821

Engineering Selection Recommendations

All substitute parts (174921-1, 1-174921-1, and 174921-2) are functionally equivalent to the main part 174921-7 and are suitable for direct substitution based on electrical and mechanical compatibility. Selection among these alternatives should be based on the following criteria:

Compliance Status: Parts 174921-1 and 174921-2 carry ROHS3 Compliant certification, while 174921-7 and 1-174921-1 carry RoHS Compliant certification. Both compliance levels are acceptable for applications requiring RoHS adherence.

REACH Status: Parts 174921-7, 174921-1, and 174921-2 are REACH Unaffected. Part 1-174921-1 has Vendor Undefined REACH status, which may require clarification for applications with strict REACH compliance requirements.

Inventory Availability: Part 1-174921-1 offers the highest inventory level at 3200 pieces, followed by 174921-1 at 2380 pieces, 174921-2 at 1821 pieces, and 174921-7 at 1111 pieces. Selection based on availability may be appropriate for high-volume procurement scenarios.

Color Designation: The yellow housing of 174921-7 may be specified for circuit identification purposes. White (174921-1, 1-174921-1) and black (174921-2) alternatives are available where color coding is not functionally critical.

Frequently Asked Questions (FAQ)

Q: Can 174921-1 be used as a direct replacement for 174921-7?

A: Yes. Both parts are electrically and mechanically equivalent, sharing identical specifications for connector type, contact type, position count, pitch, mounting configuration, termination method, insulation material, and operating temperature range. The only difference is housing color (white versus yellow). Direct substitution is possible unless color coding is a functional requirement.

Q: What is the difference between 174921-1 and 1-174921-1?

A: Both parts are white-colored 3-position plug housings with identical electrical and mechanical specifications. The primary difference is the REACH compliance status: 174921-1 is REACH Unaffected, while 1-174921-1 has Vendor Undefined REACH status. For applications requiring confirmed REACH compliance, 174921-1 is the preferred choice.

Q: Are all substitute parts RoHS compliant?

A: Yes. All parts meet RoHS requirements. Parts 174921-7 and 1-174921-1 carry RoHS Compliant certification, while 174921-1 and 174921-2 carry ROHS3 Compliant certification. Both compliance levels satisfy RoHS standards.

Q: Can I substitute 174921-2 (black) for 174921-7 (yellow)?

A: Yes, from an electrical and mechanical standpoint. Both parts are functionally identical with the same connector specifications, contact configuration, and operating parameters. Substitution is appropriate unless the yellow color is required for circuit identification or design specification purposes.

Q: What does the base product number 174921 indicate?

A: The base product number 174921 identifies the core connector housing design family. All substitute parts share this base number, with the suffix digit (7, 1, or 2) indicating the color variant. This confirms that all parts belong to the same product line and are mechanically and electrically compatible.

Q: Are contacts included with these connector housings?

A: No. All parts in this group are connector housings only. Contacts must be sourced separately and are not included in the package.

Q: What is the Moisture Sensitivity Level (MSL) significance?

A: All parts carry MSL 1 (Unlimited), indicating unlimited shelf life without moisture exposure controls. This simplifies storage and handling requirements compared to higher MSL ratings.

Q: Can these connectors be used in high-temperature applications?

A: Yes. All parts operate across the temperature range of -30°C to 105°C, making them suitable for industrial and automotive applications within this thermal envelope.

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