Molex 0545480433 FFC/FPC Connector - Equivalent & Substitute Parts

Part Overview

The Molex 0545480433 is a 4-position FFC/FPC connector with 0.5mm pitch, designed for surface mount, right-angle applications. This connector features bottom contacts, slide lock mechanism, and zero insertion force (ZIF) operation. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility, mechanical fit, and performance characteristics within the allowed parameter ranges for this connector category.

Substiute Parts

0545480433

MolexIn Stock: 8780545480433 Datasheet

Current PartRFQ

0545480434

MolexIn Stock: 10450545480434 Datasheet

MFR RecommendedRFQ

FH34SRJ-4S-0.5SH(50)

Hirose Electric Co LtdIn Stock: 18173FH34SRJ-4S-0.5SH(50) Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0545480433 is determined by strict alignment with the following critical parameters:

• Electrical Compatibility: Voltage rating of 50V or higher; current rating sufficient for 0.5A applications
• Mechanical Compatibility: 4-position configuration; 0.5mm pitch; surface mount, right-angle orientation; 0.30mm FFC/FPC thickness tolerance
• Termination & Contact: Solder termination; phosphor bronze contact material with tin bismuth or gold finish
• Environmental & Regulatory: UL94 V-0 flammability rating; ROHS3 compliance; operating temperature range of -20°C to 85°C minimum
• Functional Features: Zero insertion force (ZIF) operation; locking mechanism (slide lock or equivalent)

Substitute parts must satisfy all electrical and mechanical parameters. Variations in housing material, actuator material, contact finish thickness, or locking mechanism type are permitted provided they do not compromise electrical performance or mechanical fit within the specified tolerance envelope.

Parameter Comparison

Engineering Selection Recommendations

Molex 0545480434 is the primary substitute for the obsolete Molex 0545480433. Both parts share identical electrical and mechanical specifications, including 4-position configuration, 0.5mm pitch, surface mount right-angle orientation, and 0.047" (1.20mm) height above board. The 0545480434 is currently in active production status with higher inventory availability (992 pcs vs. 827 pcs for the original part). Both parts maintain ROHS3 compliance and UL94 V-0 flammability rating. The primary distinction is packaging format: the 0545480434 is supplied in Tape & Reel (TR) format, suitable for automated assembly processes.

Hirose FH34SRJ-4S-0.5SH(50) is an alternative substitute that meets all critical electrical and mechanical parameters. This part differs in contact configuration (top and bottom contacts versus bottom only), locking mechanism (rotary lock with backlock versus slide lock), and contact finish (gold versus tin bismuth). The Hirose connector operates across an extended temperature range (-55°C ~ 105°C) and features a reduced height above board (0.039" / 1.00mm). The FH34SRJ-4S-0.5SH(50) maintains ROHS3 compliance and UL94 V-0 rating. This part is suitable for applications requiring enhanced temperature performance or where the dual-contact configuration provides design advantages.

Selection between substitutes depends on application requirements: choose Molex 0545480434 for direct form-fit-function replacement; choose Hirose FH34SRJ-4S-0.5SH(50) for applications requiring extended temperature range or dual-contact capability.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0545480434 directly replace the obsolete 0545480433?

A: Yes. Both parts are electrically and mechanically equivalent. They share identical pitch (0.5mm), position count (4), mounting type (surface mount right angle), height above board (1.20mm), voltage rating (50V), and flammability rating (UL94 V-0). The primary difference is packaging format (Tape & Reel for the 0545480434).

Q: What are the key differences between the Molex 0545480434 and Hirose FH34SRJ-4S-0.5SH(50)?

A: The Molex 0545480434 features bottom contacts only with slide lock mechanism and tin bismuth contact finish. The Hirose FH34SRJ-4S-0.5SH(50) features top and bottom contacts with rotary lock and backlock mechanism, gold contact finish, and operates across -55°C ~ 105°C (versus -20°C ~ 85°C for Molex). The Hirose part is 0.2mm lower above board (1.00mm vs. 1.20mm).

Q: Are both substitute parts ROHS3 compliant?

A: Yes. Both the Molex 0545480434 and Hirose FH34SRJ-4S-0.5SH(50) are ROHS3 compliant with UL94 V-0 flammability rating, matching the original part's regulatory status.

Q: Does the contact finish difference (tin bismuth vs. gold) affect substitution compatibility?

A: Contact finish does not affect electrical substitution compatibility. Both tin bismuth and gold finishes meet the 50V voltage rating and 0.5A current requirement. Gold finish provides enhanced corrosion resistance; tin bismuth is standard for general-purpose applications. Selection depends on environmental exposure and application longevity requirements.

Q: Can the Hirose FH34SRJ-4S-0.5SH(50) be used in applications designed for bottom-contact-only connectors?

A: The Hirose part features both top and bottom contacts. In applications designed for bottom-contact-only operation, the top contacts remain unused but do not compromise functionality. PCB layout must accommodate the dual-contact configuration. The reduced height above board (1.00mm vs. 1.20mm) may provide design advantages in space-constrained applications.

Q: What is the significance of the locking mechanism difference (slide lock vs. rotary lock)?

A: Both mechanisms provide secure cable retention. Slide lock (Molex) operates via linear actuation; rotary lock (Hirose) operates via rotational actuation. The choice depends on connector accessibility and operator preference in the application environment. Both mechanisms are rated for 20 mating cycles.