Molex 0527451990 FFC/FPC Connector - Equivalent & Substitute Parts

Part Overview

The Molex 0527451990 is a 19-position FFC/FPC connector with 0.5mm pitch, designed for surface mount, right-angle applications. This connector features a slide lock mechanism, zero insertion force (ZIF) design, and solder termination for flat flexible cable assemblies. The product is currently obsolete, making equivalent substitutes necessary for ongoing design requirements and production continuity.

Key Parameters

Parameter	Value
Connector Type	FFC/FPC Contacts, Top
Number of Positions	19
Pitch	0.020" (0.50mm)
Mounting Type	Surface Mount, Right Angle
Termination	Solder
Locking Feature	Slide Lock
Features	Solder Retention, Zero Insertion Force (ZIF)
Voltage Rating	50V
Current Rating	0.5A
Operating Temperature	-20°C to 85°C
Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution for the Molex 0527451990 is determined by strict alignment of the following critical parameters:

Connector Configuration: 19 positions with 0.5mm pitch
Mounting Orientation: Surface mount, right-angle configuration
Contact Arrangement: Top-mounted contacts for FFC/FPC termination
Electrical Performance: Minimum voltage rating of 50V and current rating of 0.5A
Mechanical Features: Slide lock mechanism with zero insertion force (ZIF) operation
Termination Method: Solder attachment to PCB
Environmental Compliance: UL94 V-0 flammability rating and operating temperature range of -20°C to 85°C

The TE Connectivity AMP Connectors part 1-1734839-9 meets all substitution criteria for this product category.

Parameter Comparison

Parameter	Molex 0527451990	TE Connectivity 1-1734839-9	Compatibility
Manufacturer	Molex	TE Connectivity AMP Connectors	Different manufacturer
Number of Positions	19	19	Match
Pitch	0.020" (0.50mm)	0.020" (0.50mm)	Match
Connector Type	FFC/FPC Contacts, Top	FPC Contacts, Top	Compatible
Mounting Type	Surface Mount, Right Angle	Surface Mount, Right Angle	Match
Termination	Solder	Solder	Match
Locking Feature	Slide Lock	Slide Lock	Match
Features	Solder Retention, ZIF	Solder Retention, ZIF	Match
Voltage Rating	50V	250V	TE part exceeds requirement
Current Rating	0.5A	0.5A	Match
Operating Temperature	-20°C to 85°C	-20°C to 85°C	Match
Flammability Rating	UL94 V-0	UL94 V-0	Match
Height Above Board	0.079" (2.00mm)	0.081" (2.05mm)	Minimal variance
FFC/FCB Thickness	0.30mm	0.30mm	Match
Product Status	Obsolete	Active	Substitute is current production
RoHS Status	Non-compliant	ROHS3 Compliant	Substitute meets current standards
Packaging	Not specified	Tape & Reel (TR)	Standard production packaging

Engineering Selection Recommendations

The TE Connectivity 1-1734839-9 is the qualified substitute for the obsolete Molex 0527451990. Selection is based on the following engineering factors:

Product Status: The Molex part is obsolete, while the TE Connectivity equivalent is in active production with confirmed inventory availability (20,395 pieces in stock).

Electrical Compliance: The TE Connectivity part exceeds the voltage rating requirement (250V versus 50V specified), providing additional design margin. Current rating matches at 0.5A.

Regulatory Compliance: The TE Connectivity part is ROHS3 compliant, meeting current regulatory requirements. Both parts maintain UL94 V-0 flammability certification.

Mechanical Compatibility: All critical mechanical parameters align, including 19-position configuration, 0.5mm pitch, surface mount right-angle orientation, slide lock mechanism, and ZIF operation. Height above board variance is 0.05mm (2.05mm versus 2.00mm), which is within acceptable tolerance for standard PCB assembly.

Termination and Features: Solder termination, solder retention, and ZIF features are identical between parts.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 1-1734839-9 directly replace the Molex 0527451990 in existing designs?

A: Yes. The substitute part matches all critical electrical and mechanical parameters: 19 positions, 0.5mm pitch, surface mount right-angle configuration, solder termination, slide lock mechanism, and ZIF operation. The 0.05mm height variance is within standard PCB assembly tolerances.

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 termination. The TE Connectivity substitute is specified as FPC, which is compatible with standard FPC cable assemblies used in the Molex application.

Q: Does the higher voltage rating of the TE part affect compatibility?

A: No. The TE Connectivity part is rated for 250V, exceeding the 50V requirement of the original design. This provides additional electrical safety margin without affecting mechanical or functional compatibility.

Q: Are there packaging considerations for the substitute part?

A: The TE Connectivity part is supplied in Tape & Reel (TR) packaging, which is standard for high-volume production. This differs from the original part's unspecified packaging but is suitable for automated assembly processes.

Q: What is the significance of the RoHS compliance difference?

A: The original Molex part is RoHS non-compliant, while the TE Connectivity substitute is ROHS3 compliant. For new designs or production runs subject to RoHS regulations, the TE part is the appropriate selection.

Q: Are the contact materials compatible?

A: Both parts use phosphor bronze contacts. The Molex part has tin-lead finish, while the TE part has gold flash finish. Gold plating provides superior corrosion resistance and contact reliability, making it suitable for the same electrical applications.

Q: What is the moisture sensitivity level (MSL) for both parts?

A: Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

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