Molex 0557570320 Terminal Block Header – Equivalent & Substitute Parts

Part Overview

The Molex 0557570320 is a 3-position terminal block header with male pins, shrouded design, and 90° right-angle orientation. It features a 5.00mm pitch, solder termination, and through-hole mounting. The part is classified as obsolete, making identification of active equivalent components essential for ongoing design support and procurement.

Substiute Parts

0557570320

MolexIn Stock: 9860557570320 Datasheet

Current PartRFQ

796644-3

TE Connectivity AMP ConnectorsIn Stock: 56862796644-3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0557570320 is determined by the following critical parameters:

• Position Count & Pitch: 3 positions at 0.197" (5.00mm) spacing
• Connector Type & Orientation: Header with male pins, shrouded (4 side), 90° right-angle configuration
• Termination & Mounting: Solder termination with through-hole mounting
• Electrical Ratings: Current and voltage capacity within acceptable operating ranges
• Material & Compliance: Polyamide housing, copper alloy contacts, UL94 V-0 flammability rating, ROHS3 compliance

The TE Connectivity AMP Connectors part 796644-3 meets these core substitution criteria across all functional and mechanical dimensions.

Parameter Comparison

Engineering Selection Recommendations

The TE Connectivity AMP Connectors 796644-3 is the primary equivalent for the obsolete Molex 0557570320. Selection is justified on the following basis:

Functional Equivalence: Both parts share identical position count, pitch, orientation, shrouding, and termination method. PCB footprint compatibility is maintained.

Electrical Performance: The TE part meets or exceeds the Molex specification. While the UL current rating is 1 A lower (15 A vs. 16 A), the voltage rating is higher (300 V vs. 250 V), and the operating temperature range is wider (-40°C to 110°C vs. -30°C to 85°C). For most applications, this represents an acceptable trade-off with superior environmental performance.

Compliance & Certification: Both parts are ROHS3 compliant, UL94 V-0 rated, and manufactured from identical base materials (PA66 nylon housing, copper alloy contacts). Regulatory requirements are maintained.

Product Availability: The TE part is active in production with 56,783 units in stock, ensuring long-term procurement viability compared to the obsolete Molex component.

Mechanical Compatibility: Shrouded 4-side design, solder termination, and through-hole mounting are identical. Physical dimensions support direct PCB layout substitution.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 796644-3 be used as a direct replacement for the Molex 0557570320?

A: Yes. Both parts are 3-position, 5.00mm pitch, 90° right-angle terminal block headers with identical shrouding, termination, and mounting methods. PCB footprint and electrical interface are compatible.

Q: What is the difference in current rating between these parts?

A: The Molex part is rated for 16 A (UL), while the TE part is rated for 15 A (UL). The 1 A difference is within typical design margins for most applications. Verify your circuit's actual current draw against the TE part's 15 A specification.

Q: Does the TE part have a wider operating temperature range?

A: Yes. The TE Connectivity 796644-3 operates from -40°C to 110°C, compared to the Molex part's -30°C to 85°C range. This provides additional thermal margin in extreme environments.

Q: Are both parts RoHS compliant?

A: Yes. Both the Molex 0557570320 and TE Connectivity 796644-3 are ROHS3 compliant and carry UL94 V-0 flammability ratings.

Q: What are the key parameters that determine substitution eligibility?

A: Position count (3), pitch (5.00mm), orientation (90° right-angle), shrouding (4-side), connector type (header with male pins), termination (solder), and mounting method (through-hole) must all match. Electrical ratings (current, voltage) and material specifications must meet or exceed the original part's requirements.

Q: Is the TE part actively manufactured?

A: Yes. The TE Connectivity 796644-3 is classified as active with high inventory availability, ensuring reliable long-term procurement compared to the obsolete Molex component.