Molex 0399000508 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The Molex 0399000508 is an 8-position terminal block header with male pins, shrouded on 4 sides, featuring 0.150" (3.81mm) pitch vertical through-hole mounting. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. Substitute parts must maintain identical mechanical and electrical characteristics to ensure direct compatibility in existing circuit designs.

Substiute Parts

0399000508

MolexIn Stock: 10430399000508 Datasheet

Current PartRFQ

0395111008

MolexIn Stock: 6900395111008 Datasheet

MFR RecommendedRFQ

1707489

Phoenix ContactIn Stock: 11041707489 Datasheet

MFR RecommendedRFQ

1776553-8

TE Connectivity AMP ConnectorsIn Stock: 8891776553-8 Datasheet

MFR RecommendedRFQ

A-TB381-OQ08CV

Assmann WSW ComponentsIn Stock: 989A-TB381-OQ08CV Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0399000508 is determined by strict adherence to the following parameters:

• Mechanical Compatibility: 8 positions, 0.150" (3.81mm) pitch, vertical orientation, shrouded 4-side design, through-hole mounting
• Electrical Compatibility: 300 V UL voltage rating, current rating of 8 A or higher, tin contact mating finish
• Material Compliance: RoHS3 compliance, MSL 1 (Unlimited), EAR99 classification
• Termination: Solder termination only

All four substitute parts meet these core criteria. Variations in housing material (PBT vs. PA66 vs. LCP), color (black vs. green), and current ratings (8 A vs. 10 A vs. 12 A) do not preclude substitution when the primary mechanical and electrical parameters align.

Parameter Comparison

Engineering Selection Recommendations

Molex 0395111008 is the manufacturer-recommended direct substitute from Molex. It maintains active product status, identical mechanical configuration, and equivalent electrical performance. The housing material differs (PA66 vs. PBT) and current rating is reduced to 8 A, but both remain within acceptable substitution parameters. This part is preferred for designs requiring continuity within the Molex Eurostyle product family.

Phoenix Contact 1707489 (COMBICON MCV series) provides an active alternative with identical mechanical specifications and equivalent electrical ratings. The LCP housing material offers enhanced thermal stability. IEC current rating of 8 A is specified alongside UL 8 A rating. This part is suitable for applications requiring cross-manufacturer compatibility.

TE Connectivity 1776553-8 maintains the original 12 A UL current rating, matching the obsolete Molex part exactly. Active product status and PA66 housing provide long-term availability. Operating temperature range (-40°C to 105°C) is specified. Housing color is green rather than black. This part is optimal for designs with no color-coding constraints.

Assmann A-TB381-OQ08CV offers an active alternative with 10 A UL current rating. Green housing color and unspecified RoHS status require verification before deployment in regulated applications. This part is suitable as a secondary option when primary substitutes are unavailable.

Frequently Asked Questions (FAQ)

Q: Can I substitute the Molex 0399000508 with any of these parts directly?

A: Yes, all four substitute parts are mechanically and electrically compatible. They share identical pitch (3.81mm), position count (8), orientation (vertical), and termination method (solder). Verify current requirements in your application; if 12 A is mandatory, use TE Connectivity 1776553-8 or Assmann A-TB381-OQ08CV.

Q: Does housing material affect compatibility?

A: Housing material does not affect mechanical or electrical compatibility. The original part uses PBT; substitutes use PA66 or LCP. All materials are RoHS3 compliant and rated for the same voltage and current specifications. Material selection may influence thermal performance in extreme environments, but standard applications are unaffected.

Q: Why do some substitutes have lower current ratings?

A: Molex 0395111008 and Phoenix Contact 1707489 are rated for 8 A UL current, compared to the original 12 A. This reflects design differences in contact geometry and housing material. If your circuit operates below 8 A, these parts are fully compatible. If 12 A capacity is required, select TE Connectivity 1776553-8 or Assmann A-TB381-OQ08CV.

Q: Are there color differences between substitutes?

A: Yes. The original Molex 0399000508 and Molex 0395111008 are black. Phoenix Contact 1707489 and Assmann A-TB381-OQ08CV are green. Color is cosmetic and does not affect electrical or mechanical function. Select based on PCB assembly color-coding requirements.

Q: What is the difference between IEC and UL current ratings?

A: IEC and UL represent different international safety standards. Phoenix Contact 1707489 specifies both: 8 A IEC and 8 A UL. UL ratings are standard for North American applications. Both standards are equivalent for this component category.

Q: Are all substitutes RoHS3 compliant?

A: Molex 0395111008, Phoenix Contact 1707489, and TE Connectivity 1776553-8 are explicitly RoHS3 compliant. Assmann A-TB381-OQ08CV does not specify RoHS status in available data. Verify RoHS compliance with the supplier before use in regulated applications.

Q: Can I mix these parts on the same PCB?

A: Yes. All parts share identical mechanical footprints and electrical characteristics. Mixed use is permissible from an engineering standpoint, though single-part standardization is recommended for manufacturing consistency and inventory management.