TE Connectivity AMP 4-1734839-5 FPC Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP 4-1734839-5 is a 45-position flat flexible connector (FPC) with 0.50mm pitch, designed for surface mount right-angle applications. This connector features top-contact configuration with solder termination and zero insertion force (ZIF) operation. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility, mechanical fit, and functional performance within the specified operating parameters.

Key Parameters

Parameter	Value
Manufacturer Part Number	4-1734839-5
Manufacturer	TE Connectivity AMP Connectors
Category	FFC, FPC (Flat Flexible) Connectors
Number of Positions	45
Pitch	0.020" (0.50mm)
Connector Type	Contacts, Top
Mounting Type	Surface Mount, Right Angle
Termination	Solder
FFC/FCB Thickness	0.30mm
Height Above Board	0.081" (2.05mm)
Locking Feature	Slide Lock
Contact Material	Phosphor Bronze
Contact Finish	Gold
Voltage Rating	250V
Current Rating	0.5A
Operating Temperature	-20°C ~ 85°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution logic for the TE Connectivity AMP 4-1734839-5 is based on the following critical parameters that must align for functional equivalence:

Primary Matching Criteria:

Number of Positions: 45
Pitch: 0.020" (0.50mm)
Mounting Type: Surface Mount, Right Angle
Termination: Solder
FFC/FCB Thickness: 0.30mm
Contact Material: Phosphor Bronze
Contact Finish: Gold
Locking Feature: Slide Lock
Features: Zero Insertion Force (ZIF)

Secondary Compatibility Factors:

Connector/Contact Type: Top or Bottom contact configuration affects PCB layout but does not prevent substitution if mechanical and electrical parameters align
Height Above Board: Variations within 0.015" (0.38mm) are acceptable for most applications
Voltage Rating: Substitute parts must meet or exceed the original 250V specification
Current Rating: Substitute parts must support minimum 0.5A per contact
Operating Temperature: Substitute parts must cover the -20°C ~ 85°C range or broader

Substitute parts are grouped into two categories: direct equivalents (top-contact FPC connectors) and functional alternatives (bottom-contact FPC connectors with compatible electrical and mechanical specifications).

Parameter Comparison

Parameter	4-1734839-5 (Main)	62684-452100ALF	62684-452100AHLF	62684-45210E9ALF	FH12-45S-0.5SH(55)	ZF5S-45-02-T-WT
Manufacturer	TE Connectivity AMP	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Hirose Electric	Samtec Inc.
Number of Positions	45	45	45	45	45	45
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)
Connector Type	Contacts, Top	Contacts, Top	Contacts, Top	Contacts, Top	Contacts, Bottom	Contacts, Top
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
Termination	Solder	Solder	Solder	Solder	Solder	Solder
FFC/FCB Thickness	0.30mm	0.30mm, 0.33mm	0.30mm	0.30mm	0.30mm	0.30mm
Height Above Board	0.081" (2.05mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.083" (2.10mm)
Locking Feature	Slide Lock	Slide Lock	Slide Lock	Slide Lock	Flip Lock	Slide Lock
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Contact Finish	Gold	Gold	Gold	Gold	Gold	Tin
Voltage Rating	250V	50V	50V	50V	50V	Not Specified
Current Rating	0.5A	0.5A	0.5A	0.5A	0.5A	1.8A per Contact
Operating Temperature	-20°C ~ 85°C	-55°C ~ 85°C	-55°C ~ 85°C	-55°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 105°C
Product Status	Obsolete	Active	Active	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Specified

Engineering Selection Recommendations

Primary Substitute (Direct Equivalent - Top Contact):

62684-452100ALF (Amphenol ICC FCI) is the recommended primary substitute for the TE Connectivity AMP 4-1734839-5. This part maintains identical contact configuration (top), position count (45), pitch (0.50mm), mounting type (surface mount right angle), and termination method (solder). The part is currently in active production status with 1730 units in stock. It is ROHS3 compliant and carries REACH Affected designation. The primary design difference is the housing material (Polyamide PA9T, Nylon 9T, Glass Filled versus Thermoplastic in the original), which does not affect electrical or mechanical compatibility. Height above board is 0.079" (2.00mm) versus 0.081" (2.05mm) in the original, representing a negligible 0.002" difference. Operating temperature range extends to -55°C, providing broader environmental coverage than the original -20°C minimum.

Secondary Substitute (Direct Equivalent - Top Contact, Active Status):

62684-452100AHLF (Amphenol ICC FCI) serves as an alternative top-contact equivalent with active product status. This part is packaged in Cut Tape format with 1896 units available. Housing material is Liquid Crystal Polymer (LCP), Glass Filled, Halogen Free, offering enhanced thermal and chemical resistance compared to standard thermoplastic. Operating temperature range is -55°C ~ 85°C. Voltage rating is 50V, which is lower than the original 250V specification; this part is suitable only for applications where the 50V rating is sufficient. REACH Affected status applies.

Tertiary Substitute (Top Contact, Samtec Alternative):

ZF5S-45-02-T-WT (Samtec Inc.) provides a top-contact alternative with active status and 1004 units in stock. This part features Liquid Crystal Polymer (LCP) housing and actuator materials, providing superior thermal stability across the extended operating range of -55°C ~ 105°C. Current rating is 1.8A per contact, exceeding the original 0.5A specification. Contact finish is tin rather than gold. Height above board is 0.083" (2.10mm), within acceptable tolerance. Voltage rating is not specified; verification against application requirements is necessary. ROHS3 compliant.

Bottom-Contact Alternatives (Layout Dependent):

For applications where PCB layout permits bottom-contact configuration, 62684-451100ALF (Amphenol ICC FCI, active status, 2920 units) and FH12S-45S-0.5SH(55) (Hirose Electric, active status, 18681 units) provide functionally compatible alternatives with identical electrical specifications and mechanical dimensions. These parts are suitable only when the PCB design accommodates bottom-contact mounting.

Frequently Asked Questions (FAQ)

Q: Can the 62684-452100ALF directly replace the TE Connectivity AMP 4-1734839-5 without PCB modification?

A: Yes. The 62684-452100ALF maintains identical contact position (top), position count (45), pitch (0.50mm), mounting type (surface mount right angle), and termination method (solder). Height above board differs by 0.002" (0.05mm), which is within standard PCB tolerance. No PCB redesign is required.

Q: What is the significance of the voltage rating difference between the original part (250V) and substitute parts (50V)?

A: The original TE Connectivity AMP 4-1734839-5 is rated for 250V operation. Amphenol ICC substitute parts (62684-452100ALF, 62684-452100AHLF, 62684-45210E9ALF) are rated for 50V. Substitution is valid only for applications operating at 50V or below. For applications requiring 250V operation, the Samtec ZF5S-45-02-T-WT does not specify a voltage rating and requires verification against application requirements.

Q: Are bottom-contact FPC connectors (62684-451100ALF, FH12-45S-0.5SH(55)) compatible with the original top-contact design?

A: Bottom-contact connectors are electrically and mechanically compatible with top-contact designs only if the PCB layout is redesigned to accommodate the inverted contact position. The connector pitch, position count, and electrical specifications remain identical. PCB modification is required; connector substitution alone is insufficient.

Q: What is the difference between Slide Lock and Flip Lock locking mechanisms?

A: Both mechanisms provide zero insertion force (ZIF) operation. Slide Lock (original part and most substitutes) uses a sliding actuator for cable retention. Flip Lock (Hirose FH12 series) uses a hinged actuator. Both are functionally equivalent for cable retention and ZIF operation. Locking mechanism selection depends on available PCB space and operator preference.

Q: Does the contact finish material (gold versus tin) affect substitution compatibility?

A: Contact finish affects corrosion resistance and solderability but does not prevent electrical or mechanical substitution. Gold finish (original and most substitutes) provides superior corrosion resistance and is preferred for high-reliability applications. Tin finish (Samtec ZF5S-45-02-T-WT) is acceptable for standard industrial applications. Soldering processes remain compatible with both finishes.

Q: What is the impact of housing material differences (Thermoplastic, LCP, Polyamide) on connector performance?

A: Housing material affects thermal stability, chemical resistance, and mechanical strength but does not alter electrical performance or mechanical fit. Liquid Crystal Polymer (LCP) and Polyamide (PA9T) materials provide superior thermal and chemical resistance compared to standard thermoplastic. Material selection depends on environmental exposure and operating temperature requirements. All materials listed are UL94 V-0 rated for flammability.

Q: Are all substitute parts RoHS compliant?

A: Yes. The original TE Connectivity AMP 4-1734839-5 is ROHS3 compliant. All recommended substitute parts (62684-452100ALF, 62684-452100AHLF, 62684-45210E9ALF, FH12-45S-0.5SH(55), FH12S-45S-0.5SH(55), ZF5S-45-02-T-WT, ZF5S-45-01-T-WT) are RoHS compliant or ROHS3 compliant. REACH compliance status varies by manufacturer and part number; verification is required for applications subject to REACH regulations.

Q: What is the current rating difference between the original part (0.5A) and the Samtec ZF5S-45-02-T-WT (1.8A per contact)?

A: The Samtec part supports higher current capacity (1.8A per contact versus 0.5A). This difference does not prevent substitution; the higher rating provides additional design margin for applications requiring increased current capacity. Applications designed for 0.5A operation remain fully compatible with the higher-rated Samtec connector.

Q: Can the obsolete 62684-45210E9ALF be used as a substitute if the active-status 62684-452100ALF is unavailable?

A: Yes. The 62684-45210E9ALF is functionally equivalent to the 62684-452100ALF with identical electrical and mechanical specifications. However, active-status parts (62684-452100ALF, 62684-452100AHLF) are preferred for new designs and long-term production due to ongoing manufacturer support and availability. The obsolete 62684-45210E9ALF is suitable for maintenance and repair applications where existing inventory is available (770 units in stock).

Q: What is the operating temperature range difference, and does it affect substitution?

A: The original part operates from -20°C ~ 85°C. Most substitute parts extend the lower limit to -55°C, providing broader environmental coverage. The Samtec ZF5S-45-02-T-WT extends the upper limit to 105°C. Extended temperature ranges do not prevent substitution; they provide additional design margin for applications exposed to extreme temperatures. Applications operating within the original -20°C ~ 85°C range remain fully compatible with all substitute parts.

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