Molex 0524372433 FFC/FPC Connector - Equivalent & Substitute Parts

Part Overview

The Molex 0524372433 is a 24-position FFC/FPC connector with 0.5mm pitch, bottom-mounted contacts, and right-angle surface mount configuration. This connector is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The part features Zero Insertion Force (ZIF) operation, slide lock mechanism, and solder termination suitable for flat flexible cable assemblies in consumer electronics and industrial equipment.

Key Parameters

Parameter	Value
Manufacturer Part Number	0524372433
Manufacturer	Molex
Category	FFC, FPC (Flat Flexible) Connectors
Number of Positions	24
Pitch	0.020" (0.50mm)
Mounting Type	Surface Mount, Right Angle
Contact Position	Bottom
Voltage Rating	50V
Current Rating	0.5A
Operating Temperature	-40°C ~ 85°C
Termination	Solder
Locking Feature	Slide Lock
FFC/FCB Thickness	0.30mm
Height Above Board	0.079" (2.00mm)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the Molex 0524372433 are qualified based on the following critical parameters that determine functional interchangeability:

Primary Substitution Criteria:

24-position connector configuration
0.5mm (0.020") pitch spacing
Bottom-mounted contact orientation
Right-angle surface mount configuration
0.30mm FFC/FCB thickness compatibility
Solder termination method
50V voltage rating minimum
0.5A current rating minimum
Zero Insertion Force (ZIF) operation
Slide lock or equivalent locking mechanism
Operating temperature range of -40°C to 85°C or compatible subset
UL94 V-0 flammability rating
ROHS3 compliance

Substitute parts are grouped into two categories: direct Molex series replacements (0524372472) and cross-manufacturer alternatives from JST Sales America Inc., Würth Elektronik, and Adam Tech. All listed substitutes maintain electrical and mechanical compatibility within the specified parameter envelope.

Parameter Comparison

Parameter	0524372433 (Main)	0524372472 (Molex)	24FLZ-RSM2-TB (JST)	24FLZ-SM2-TB (JST)	68712414522 (Würth)	PCA-6-LA-24-HL-3-T/R (Adam Tech)
Manufacturer	Molex	Molex	JST Sales America Inc.	JST Sales America Inc.	Würth Elektronik	Adam Tech
Number of Positions	24	24	24	24	24	24
Pitch	0.020" (0.50mm)	0.020" (0.50mm)	0.020" (0.50mm)	0.020" (0.50mm)	0.020" (0.50mm)	0.020" (0.50mm)
Mounting Type	Surface Mount, Right Angle	Surface Mount, Right Angle	Surface Mount, Right Angle	Surface Mount, Right Angle	Surface Mount, Right Angle	Surface Mount, Right Angle
Contact Position	Bottom	Bottom	Bottom	Top	Bottom	Bottom
Voltage Rating	50V	50V	50V	50V	50V	Not specified
Current Rating	0.5A	0.5A	0.5A	0.5A	0.5A	0.5A
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-25°C ~ 85°C	-25°C ~ 85°C	-25°C ~ 85°C	-25°C ~ 85°C
Termination	Solder	Solder	Solder	Solder	Solder	Solder
Locking Feature	Slide Lock	Flip Lock	Slide Lock	Slide Lock	Slide Lock	Slide Lock
FFC/FCB Thickness	0.30mm	0.30mm	0.30mm	0.30mm	0.30mm	0.30mm
Height Above Board	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.091" (2.30mm)
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Contact Finish	Tin Bismuth	Tin Bismuth	Tin	Tin	Tin	Tin
Features	Solder Retention, ZIF	Solder Retention, ZIF	Solder Retention, ZIF	Solder Retention, ZIF	ZIF	Solder Retention, ZIF
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Molex 0524372472 is the primary recommended substitute. This part maintains identical electrical specifications, mechanical dimensions, and operating temperature range as the original 0524372433. Both parts are from the same Easy-On 52437 series and share equivalent housing and actuator materials. The 0524372472 is currently in active production status with higher inventory availability (8698 units), ensuring supply chain continuity. The primary difference is the locking mechanism change from slide lock to flip lock, which does not affect electrical or thermal performance.

JST 24FLZ-RSM2-TB provides an alternative from a different manufacturer while maintaining bottom contact orientation and slide lock configuration. This part operates within a narrower temperature range (-25°C to 85°C) compared to the original specification. The contact finish differs (tin versus tin bismuth), and housing material is PA6T nylon rather than PA glass-filled nylon. This substitute is suitable for applications not requiring the extended -40°C lower temperature limit.

JST 24FLZ-SM2-TB is functionally equivalent but features top-mounted contacts instead of bottom-mounted. This part is suitable only for applications where contact orientation can be accommodated in the PCB layout. The narrower operating temperature range (-25°C to 85°C) applies.

Würth Elektronik 68712414522 offers bottom-mounted contact configuration with slide lock mechanism. Housing and actuator materials are liquid crystal polymer (LCP) rather than nylon-based materials, providing enhanced dimensional stability and chemical resistance. Operating temperature range is -25°C to 85°C. Mating cycle rating is 25 cycles, exceeding the original specification of 20 cycles.

Adam Tech PCA-6-LA-24-HL-3-T/R maintains bottom contact orientation and slide lock configuration. Height above board is 0.091" (2.30mm), which is 0.012" higher than the original specification. Voltage rating is not specified for this part. This substitute is suitable only when PCB clearance accommodates the increased height.

All substitute parts maintain ROHS3 compliance and are suitable for direct electrical substitution within their specified operating parameters.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0524372472 be used as a direct replacement for the 0524372433?

A: Yes. Both parts share identical electrical ratings (50V, 0.5A), mechanical dimensions (24 positions, 0.5mm pitch, 2.00mm height), operating temperature range (-40°C to 85°C), and termination method (solder). The locking mechanism differs (flip lock versus slide lock), but this does not affect electrical performance or mechanical compatibility with standard FFC/FPC cables.

Q: What is the impact of the contact finish difference between tin bismuth and tin?

A: Contact finish material affects corrosion resistance and solderability characteristics. Tin bismuth provides enhanced corrosion resistance in high-humidity environments. Tin finish is acceptable for standard industrial applications. Selection depends on environmental exposure requirements and soldering process compatibility.

Q: Why do some substitute parts have a narrower operating temperature range?

A: Operating temperature range is determined by housing and actuator material properties. Nylon-based materials (PA, PA6T) typically support -25°C to 85°C, while glass-filled nylon supports extended lower temperatures to -40°C. Applications requiring operation below -25°C must use the Molex 0524372433 or 0524372472.

Q: Is the JST 24FLZ-SM2-TB compatible with the original application?

A: This part is electrically and mechanically equivalent but features top-mounted contacts instead of bottom-mounted. Compatibility depends on PCB layout and cable routing. Top-mounted contact orientation requires different PCB footprint design and cable approach angle.

Q: What is the significance of the height difference in the Adam Tech PCA-6-LA-24-HL-3-T/R?

A: The Adam Tech part is 0.30mm taller (2.30mm versus 2.00mm above board). This affects PCB clearance requirements and may impact cable bend radius constraints. Use this substitute only when PCB design accommodates the increased height.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, ensuring compatibility with RoHS-regulated supply chains and end-use applications.

Q: What is the difference between FFC and FPC connector types?

A: FFC (Flat Flexible Cable) connectors accommodate both FFC and FPC cables. FPC (Flexible Printed Circuit) connectors are optimized for FPC cables with integrated circuitry. The Molex 0524372433 and most substitutes support both FFC and FPC cable types, with the exception of the Würth Elektronik 68712414522, which is specified as FPC-only.

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