Molex 0521170340 Rectangular Connector Housing - Equivalent & Substitute Parts

Part Overview

The Molex 0521170340 is a 3-position receptacle housing connector from the Mizu-P25 waterproof series, designed for applications requiring IP67-rated mated protection. This white polyester glass-filled housing operates across -40°C to 105°C and uses crimp termination with locking ramp fastening. The part is currently active in production with 1310 units in stock.

Substitute parts become necessary when specific color requirements differ, when alternative series compatibility is required, or when sourcing constraints affect availability. The following equivalent and substitute options maintain core functional parameters while offering variations in series, color, pitch tolerance, and environmental ratings.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Contact Type	Female Socket
Number of Positions	3
Pitch	0.098" (2.50mm)
Mounting Type	Free Hanging (In-Line)
Contact Termination	Crimp
Operating Temperature Range	-40°C to 105°C
Waterproof Rating	IP67 (Mated)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0521170340 is determined by the following critical parameters:

Primary Substitution Criteria (Must Match):

Connector type: Receptacle
Contact type: Female socket
Number of positions: 3
Pitch: 0.098" (2.50mm)
Mounting type: Free hanging (in-line)
Contact termination: Crimp
RoHS compliance: ROHS3 compliant

Secondary Variation Parameters (Allowed to Differ):

Color (white, black, red)
Series designation (Mizu-P25 52117, Mizu-P25 52213, or alternative series)
Insulation material composition (polyester glass-filled vs. polyamide nylon)
Fastening mechanism (locking ramp vs. latch lock)
Product status (active vs. obsolete)

Non-Substitutable Parameters:

Connector type (receptacle vs. plug)
Pitch tolerance (2.50mm vs. 2.54mm represents incompatible contact spacing)
Number of positions (3-position only)

Parameter Comparison

Parameter	0521170340 (Main)	0521170341	0521170342	0522130311	926475-3	DF1B-3EP-2.5RC
Manufacturer	Molex	Molex	Molex	Molex	TE Connectivity	Hirose Electric
Connector Type	Receptacle	Receptacle	Receptacle	Receptacle	Receptacle	Plug
Contact Type	Female Socket	Female Socket	Female Socket	Female Socket	Female Socket	Male Pin
Positions	3	3	3	3	3	3
Pitch	0.098" (2.50mm)	0.098" (2.50mm)	0.098" (2.50mm)	0.098" (2.50mm)	0.100" (2.54mm)	0.098" (2.50mm)
Color	White	Black	Red	Black	Black	White
Series	Mizu-P25 52117	Mizu-P25 52117	Mizu-P25 52117	Mizu-P25 52213	AMPMODU Mod IV	DF1B
Fastening Type	Locking Ramp	Locking Ramp	Locking Ramp	Locking Ramp	—	Latch Lock
Insulation Material	Polyester, Glass Filled	Polyester, Glass Filled	Polyester, Glass Filled	Polyester, Glass Filled	PBT, Glass Filled	Polyamide (PA), Nylon
Operating Temperature	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-65°C to 105°C	-35°C to 85°C
Waterproof Rating	IP67 (Mated)	IP67 (Mated)	IP67 (Mated)	IP67 (Mated)	—	—
Product Status	Active	Active	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended Primary Substitutes):

Molex 0521170341 and Molex 0522130311 are parametric equivalents within the Mizu-P25 waterproof series. Both maintain identical pitch (2.50mm), position count (3), contact type (female socket), termination method (crimp), and operating temperature range (-40°C to 105°C). The 0521170341 differs only in color (black vs. white) and remains within the same base series (52117). The 0522130311 operates under the 52213 variant of the Mizu-P25 series with equivalent electrical and mechanical specifications. Both parts are active in production status and ROHS3 compliant with REACH unaffected status.

Color Variant (Obsolete Status):

Molex 0521170342 provides a red housing variant within the same Mizu-P25 52117 series. This part is obsolete and carries REACH affected status, making it unsuitable for new designs or long-term sourcing strategies.

Cross-Manufacturer Receptacle Option (Pitch Incompatibility):

TE Connectivity 926475-3 is a 3-position receptacle from the AMPMODU Mod IV series. This part operates at 2.54mm pitch, which is incompatible with the 2.50mm pitch of the main part. Contact spacing differences prevent direct mating with existing 2.50mm pitch connectors. This part lacks waterproof rating and fastening type specification. Selection requires confirmation that 2.54mm pitch compatibility exists in the target application.

Complementary Plug Housing (Connector Type Mismatch):

Hirose Electric DF1B-3EP-2.5RC is a plug housing (male pin) rather than a receptacle (female socket). This part maintains 2.50mm pitch and 3-position configuration but operates at reduced temperature range (-35°C to 85°C) compared to the main part. No waterproof rating is specified. This part functions as a mating connector to receptacle housings and is not a direct substitute for receptacle applications.

Selection Guidance:

For applications requiring waterproof IP67 mated protection within the -40°C to 105°C operating range, select Molex 0521170341 or 0522130311. For applications where pitch tolerance permits 2.54mm spacing and waterproof rating is not required, TE Connectivity 926475-3 is viable. For applications requiring a mating plug connector at 2.50mm pitch, Hirose DF1B-3EP-2.5RC is applicable. Avoid 0521170342 due to obsolete status and REACH affected designation.

Frequently Asked Questions (FAQ)

Q: Can Molex 0521170341 directly replace Molex 0521170340?

A: Yes. Both parts are 3-position receptacles with 2.50mm pitch, crimp termination, locking ramp fastening, and identical operating temperature range (-40°C to 105°C). The only difference is housing color (black vs. white). Both maintain IP67 waterproof rating when mated and are ROHS3 compliant with REACH unaffected status.

Q: Is Molex 0522130311 compatible with the same contact set as 0521170340?

A: Yes. Both parts operate at 2.50mm pitch with 3 positions and crimp termination. The 0522130311 belongs to the Mizu-P25 52213 series variant while 0521170340 is 52117 series, but both use identical contact spacing and termination method. Verify contact compatibility through the respective series documentation.

Q: Why is TE Connectivity 926475-3 listed as a substitute if the pitch differs?

A: The 926475-3 operates at 2.54mm pitch, which is incompatible with the 2.50mm pitch of the main part. This part is listed as a cross-manufacturer option only for applications where 2.54mm pitch compatibility already exists in the system design. It is not a direct substitute for 2.50mm pitch applications.

Q: Can Hirose DF1B-3EP-2.5RC be used in place of the Molex 0521170340?

A: No. The DF1B-3EP-2.5RC is a plug housing with male pins, while the 0521170340 is a receptacle housing with female sockets. These are complementary connector types designed to mate together, not to substitute for one another. The DF1B-3EP-2.5RC functions as the mating half of a connector pair.

Q: What is the impact of Molex 0521170342 being obsolete?

A: Obsolete status indicates the part is no longer in active production. Existing inventory may be available but future sourcing is not guaranteed. For new designs or applications requiring long-term component availability, select active status parts such as 0521170341 or 0522130311 instead.

Q: Does the operating temperature range difference between parts affect substitution?

A: Yes. The main part operates -40°C to 105°C. TE Connectivity 926475-3 extends to -65°C (lower limit) but Hirose DF1B-3EP-2.5RC is limited to -35°C to 85°C. If the application requires the full -40°C to 105°C range, only Molex parts (0521170340, 0521170341, 0521170342, 0522130311) are suitable.

Q: Are all listed parts ROHS3 compliant?

A: Yes, all parts are ROHS3 compliant. However, Molex 0521170342 carries REACH affected status while all other parts are REACH unaffected. For applications subject to REACH restrictions, avoid 0521170342.

Q: What determines whether a part can substitute for the 0521170340?

A: Substitution requires matching connector type (receptacle), contact type (female socket), position count (3), pitch (2.50mm), mounting type (free hanging in-line), and termination method (crimp). Color, series designation, and fastening mechanism details may vary. Connector type or pitch mismatches disqualify a part from substitution.

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