Molex 0398400103 Terminal Block - Equivalent & Substitute Parts

Part Overview

The Molex 0398400103 is a 3-position wire-to-board terminal block with 5mm pitch, designed for horizontal mounting through PCB holes. This component features side-entry interlocking design with screw wire termination, rated for 15A at 300V, and accommodates wire gauges from 14-24 AWG.

The 0398400103 carries an Obsolete product status. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs or system maintenance.

Key Parameters

Parameter	Value
Positions Per Level	3
Pitch	0.197" (5.00mm)
Mating Orientation	Horizontal with Board
Current Rating	15 A
Voltage Rating	300 V
Wire Gauge	14-24 AWG
Mounting Type	Through Hole
Wire Termination	Screw
Features	Interlocking (Side)
Operating Temperature	85°C
Series	Eurostyle 39840

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0398400103 is determined by the following critical parameters:

Pitch and Position Count: Must maintain 0.197" (5.00mm) pitch with 3 positions per level to ensure PCB footprint compatibility
Mating Orientation: Must be horizontal with board configuration for mechanical fit
Mounting Type: Must be through-hole to match existing PCB design
Wire Termination Method: Screw-based termination is required for functional compatibility
Interlocking Feature: Side-entry interlocking design must be preserved
Electrical Ratings: Voltage rating of 300V is mandatory; current rating and wire gauge ranges may vary within acceptable operational limits

The Molex 0398900303 qualifies as a direct substitute based on these parameters. Both components share identical pitch, position count, mating orientation, mounting type, and interlocking configuration. The 0398900303 represents an active product from the related Eurostyle 39890 series, providing improved availability and modern compliance certifications.

Parameter Comparison

Parameter	0398400103 (Main Part)	0398900303 (Substitute)
Manufacturer	Molex	Molex
Category	Terminal Blocks	Terminal Blocks
Positions Per Level	3	3
Pitch	0.197" (5.00mm)	0.197" (5.00mm)
Mating Orientation	Horizontal with Board	Horizontal with Board
Voltage Rating	300 V	300 V
Mounting Type	Through Hole	Through Hole
Wire Termination	Screw	Screw - Rising Cage Clamp
Features	Interlocking (Side)	Interlocking (Side)
Current Rating	15 A	14.6 A
Wire Gauge	14-24 AWG	16-30 AWG
Operating Temperature	85°C	-40°C ~ 105°C
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The Molex 0398900303 is the qualified substitute for the obsolete 0398400103. Selection is based on the following engineering criteria:

Product Status: The 0398900303 maintains Active product status with 36,075 units in stock, ensuring long-term availability compared to the Obsolete 0398400103 with limited inventory.

Regulatory Compliance: The 0398900303 is ROHS3 compliant, meeting current environmental regulations. The original 0398400103 is RoHS non-compliant, which may present procurement restrictions in regulated markets.

Electrical Compatibility: Both components are rated for 300V operation. The 0398900303 current rating of 14.6A is lower than the original 15A specification; however, this remains suitable for applications not requiring the full 15A capacity of the original design.

Mechanical Compatibility: Identical pitch (5mm), position count (3), mating orientation, and through-hole mounting ensure direct PCB footprint compatibility without layout modifications.

Functional Enhancement: The 0398900303 incorporates a rising cage clamp mechanism with improved screw termination design and extended operating temperature range (-40°C to 105°C), providing superior performance characteristics over the original design.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0398900303 be used as a direct replacement for the 0398400103 without PCB modifications?

A: Yes. Both components share identical 5mm pitch, 3-position configuration, horizontal mating orientation, and through-hole mounting. No PCB layout changes are required.

Q: What is the impact of the lower current rating (14.6A vs. 15A) on system design?

A: The 0398900303 current rating of 14.6A is lower than the original 15A specification. Applications operating at or below 14.6A will function identically. Applications requiring the full 15A capacity must be evaluated for thermal and electrical performance with the substitute component.

Q: Does the wire gauge range difference affect compatibility?

A: The 0398900303 accepts wire gauges 16-30 AWG, while the original accepts 14-24 AWG. The overlap range (16-24 AWG) is fully compatible. Wire gauges 14-15 AWG from the original specification are not supported by the substitute; applications using these gauges require alternative solutions.

Q: What are the compliance advantages of the 0398900303?

A: The 0398900303 is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The original 0398400103 is RoHS non-compliant, which may restrict procurement in regulated industries and markets.

Q: Are there packaging differences between these components?

A: The 0398400103 packaging is unspecified in available documentation. The 0398900303 is supplied in Bulk packaging. Confirm packaging requirements with your procurement specifications.

Q: What is the significance of the rising cage clamp termination in the 0398900303?

A: The rising cage clamp mechanism provides improved wire retention and reduced insertion force compared to standard screw termination. This design enhancement improves assembly reliability and reduces operator fatigue during installation.

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