Molex 0399900410 Terminal Block Header – Equivalent & Substitute Parts

Part Overview

The Molex 0399900410 is a 10-position terminal block header with male pins, partial shroud, and 5.00mm pitch designed for vertical through-hole mounting. This component is classified as Obsolete, making identification of compatible substitute parts essential for ongoing system support and procurement planning. The part operates at 10A (UL) and 300V (UL) with a maximum operating temperature of 140°C, suitable for industrial control and power distribution applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	0399900410
Manufacturer	Molex
Category	Terminal Blocks
Number of Positions	10
Pitch	0.197" (5.00mm)
Header Orientation	Vertical
Type	Header, Male Pins, Partial Shroud
Termination Style	Solder
Mounting Type	Through Hole
Current Rating (UL)	10 A
Voltage Rating (UL)	300 V
Operating Temperature	140°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0399900410 is determined by the following critical parameters:

Mandatory Matching Parameters:

Number of positions: 10
Header orientation: Vertical
Type: Header with male pins and partial shroud
Termination style: Solder
Mounting type: Through hole
Current rating (UL): 10 A minimum
Voltage rating (UL): 300 V minimum
Operating temperature: 140°C minimum

Allowable Variation:

Pitch tolerance: The substitute part 0399800410 operates at 0.200" (5.08mm) pitch, representing a 0.003" (0.08mm) deviation from the original 0.197" (5.00mm) specification. This variation falls within acceptable mechanical tolerance for terminal block header applications where connector spacing accommodates standard PCB layout practices.

The Molex 0399800410 qualifies as a direct substitute based on matching all mandatory parameters while maintaining electrical performance and mechanical compatibility within standard engineering tolerances.

Parameter Comparison

Parameter	0399900410 (Original)	0399800410 (Substitute)
Manufacturer	Molex	Molex
Number of Positions	10	10
Pitch	0.197" (5.00mm)	0.200" (5.08mm)
Header Orientation	Vertical	Vertical
Type	Header, Male Pins, Partial Shroud	Header, Male Pins, Partial Shroud
Termination Style	Solder	Solder
Mounting Type	Through Hole	Through Hole
Current Rating (UL)	10 A	10 A
Voltage Rating (UL)	300 V	300 V
Operating Temperature	140°C	140°C
Contact Material	Brass	Brass
Housing Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon
Contact Mating Finish	Tin	Tin
Features	Locking Feature	Locking Feature
Insulation Height	0.700" (17.78mm)	0.700" (17.78mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Last Time Buy

Engineering Selection Recommendations

The Molex 0399800410 is the qualified substitute for the obsolete Molex 0399900410. Both components maintain ROHS3 compliance and identical electrical performance specifications (10A at 300V, 140°C operating temperature). The 0399800410 carries Last Time Buy status, indicating limited future availability; procurement planning should account for this constraint.

The pitch differential of 0.003" (0.08mm) between the original and substitute represents a standard tolerance variation in terminal block header design. PCB layout accommodation for this spacing difference is within normal engineering practice for through-hole component placement.

Both parts share identical contact materials (brass), housing composition (polyamide/nylon), and locking features, ensuring mechanical and electrical interchangeability in applications designed for 10-position vertical solder-mount terminal block headers.

Frequently Asked Questions (FAQ)

Q: Can the 0399800410 be used as a direct replacement for the 0399900410?

A: Yes. The 0399800410 meets all mandatory electrical and mechanical specifications. The pitch difference of 0.003" (0.08mm) is within acceptable tolerance for terminal block header applications and does not affect electrical performance or current/voltage ratings.

Q: What is the significance of the pitch difference between 5.00mm and 5.08mm?

A: The pitch difference represents standard manufacturing tolerance in terminal block header design. PCB footprints for 5.00mm pitch headers accommodate the 5.08mm pitch substitute without functional degradation. This variation is common in industrial terminal block applications.

Q: Why is the original part marked Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The substitute part 0399800410 is marked Last Time Buy, meaning Molex has announced final production runs. Procurement should prioritize securing inventory for long-term system support.

Q: Are there any compliance differences between the two parts?

A: No. Both parts are ROHS3 compliant with identical moisture sensitivity levels (MSL 1 – Unlimited). Electrical certifications (10A UL, 300V UL) and operating temperature ratings (140°C) are identical.

Q: What packaging is available for the substitute part?

A: The 0399800410 is supplied in Bulk packaging, with 682 pieces currently in stock as new original inventory.

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