Molex 0399900409 Terminal Block Header – Equivalent & Substitute Parts

Part Overview

The Molex 0399900409 is a 9-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 active equivalent parts essential for ongoing production and maintenance applications. The substitute part maintains functional compatibility while offering current product status and improved availability.

Substiute Parts

0399900409

MolexIn Stock: 7410399900409 Datasheet

Current PartRFQ

0399800409

MolexIn Stock: 8760399800409 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Molex 0399800409 qualifies as a direct substitute based on the following alignment of critical parameters:

• Position Count: Both parts feature 9 positions per level with 1 level configuration
• Header Type: Both are male pin headers with partial shroud design
• Orientation: Both are vertical through-hole mounted
• Electrical Ratings: Identical current (10 A UL) and voltage (300 V UL) specifications
• Termination: Both use solder termination
• Material Composition: Identical brass contacts and polyamide/nylon housing
• Temperature Rating: Both rated to 140°C operating temperature
• Compliance: Both ROHS3 compliant

The primary difference is pitch specification: the main part uses 5.00mm (0.197") pitch, while the substitute uses 5.08mm (0.200") pitch. This represents a minor dimensional variance within the Eurostyle terminal block family.

Parameter Comparison

Engineering Selection Recommendations

The Molex 0399800409 is the active equivalent for the obsolete 0399900409. Selection should be based on the following factors:

Product Status: The 0399900409 is obsolete with limited remaining inventory (634 pcs). The 0399800409 is active with higher availability (864 pcs), ensuring long-term supply chain continuity.

Compliance & Certifications: Both parts maintain identical ROHS3 compliance, EAR99 ECCN classification, and MSL 1 rating, ensuring regulatory and environmental requirements are met without modification.

Electrical & Thermal Performance: Identical current, voltage, and temperature ratings confirm functional equivalence for the intended application.

Pitch Consideration: The 0.08mm pitch difference (5.00mm vs. 5.08mm) represents a minor dimensional variance within the Eurostyle terminal block family. PCB layout verification is necessary to confirm mechanical fit within existing mounting holes and spacing constraints.

Frequently Asked Questions (FAQ)

Q: Can the 0399800409 directly replace the 0399900409 without PCB modification?

A: Functional compatibility is confirmed based on electrical ratings, termination style, and connector type. However, the pitch difference of 0.08mm requires verification against PCB hole spacing and mounting pad layout to ensure mechanical fit.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts are ROHS3 compliant, carry EAR99 ECCN classification, and share identical MSL 1 moisture sensitivity ratings.

Q: What is the significance of the pitch difference?

A: Pitch defines the center-to-center distance between connector positions. The 0.08mm difference (5.00mm to 5.08mm) is within standard Eurostyle terminal block tolerances but requires PCB layout confirmation to ensure proper alignment with existing through-hole patterns.

Q: Why is the main part obsolete?

A: The 0399900409 has been superseded by the 0399800409 within Molex's product portfolio. The substitute maintains all critical electrical and mechanical specifications while offering active product status and improved availability.

Q: Are there inventory considerations for this substitution?

A: The 0399900409 has 634 pcs in stock (obsolete status), while the 0399800409 has 864 pcs available (active status). For new designs or long-term production, the active substitute is recommended.