M20-7890442 Equivalent & Substitute Parts

Part Overview

The M20-7890442 is a 4-position receptacle connector manufactured by Harwin Inc., designed for through-hole, right-angle mounting applications. This connector features 0.100" (2.54mm) pitch spacing, gold-plated mating contacts, and a current rating of 3A at 1000V. The product is active and in stock with 978 units available. Equivalent parts are identified to support procurement flexibility, design continuity, and supply chain alternatives when the primary part becomes unavailable or when design specifications permit substitution.

Substiute Parts

M20-7890442

Harwin Inc.In Stock: 1079M20-7890442 Datasheet

Current PartRFQ

0901481204

MolexIn Stock: 17190901481204 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The M20-7890442 has one identified equivalent part: Molex 0901481204. Substitution eligibility is determined by the following critical parameters:

• Connector Configuration: Both parts are 4-position receptacle connectors with 0.100" (2.54mm) pitch spacing
• Mounting Method: Both use through-hole, right-angle mounting with solder termination
• Contact System: Both feature female socket contacts with gold-plated mating surfaces and phosphor bronze material
• Electrical Performance: Both support 3A current rating and push-pull fastening
• Compliance: Both are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating
• Insulation Material: Both use polyamide-based insulation (PA6T Nylon 6T for M20-7890442; PBT Polyester for 0901481204)

The substitute part meets the core functional and electrical requirements for board-to-board connectivity in the specified pitch and position configuration.

Parameter Comparison

Engineering Selection Recommendations

Both the M20-7890442 and 0901481204 are active products with ROHS3 compliance and unlimited moisture sensitivity ratings, making them suitable for equivalent selection in applications where the specified parameters align.

Voltage Consideration: The M20-7890442 is rated for 1000V, while the 0901481204 is rated for 350V. Selection between these parts must account for the application's voltage requirements. The M20-7890442 is appropriate for high-voltage applications, whereas the 0901481204 is suitable for general-purpose, industrial, and telecommunications applications operating at or below 350V.

Temperature Range: The 0901481204 supports an extended lower operating temperature of -55°C compared to the M20-7890442 at -40°C. For applications requiring operation below -40°C, the Molex part provides additional thermal margin.

Contact Post Length: The M20-7890442 has a contact post length of 0.118" (3.00mm), while the 0901481204 measures 0.114" (2.90mm). This 0.004" difference is within typical PCB tolerance ranges for through-hole mounting but should be verified against specific board design requirements.

Insulation Material: The M20-7890442 uses PA6T Nylon 6T, while the 0901481204 uses glass-filled PBT. Both materials meet UL94 V-0 or equivalent flammability standards and are suitable for industrial applications.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0901481204 directly replace the Harwin M20-7890442 in all applications?

A: Direct substitution is possible for applications operating at 350V or below. For applications requiring 1000V operation, the M20-7890442 must be used. Both parts share identical pitch spacing (0.100"), position count (4), mounting method (through-hole right angle), and contact configuration (female socket, gold-plated), ensuring mechanical and electrical compatibility within voltage limits.

Q: What is the significance of the contact post length difference?

A: The M20-7890442 has a contact post length of 0.118" (3.00mm) versus 0.114" (2.90mm) for the 0901481204. This 0.004" difference reflects manufacturing tolerances between manufacturers. PCB design should accommodate standard through-hole tolerances. Verify board thickness and hole depth specifications to ensure proper contact engagement with either part.

Q: Are there temperature-related constraints for substitution?

A: The M20-7890442 operates from -40°C to 105°C, while the 0901481204 extends to -55°C. For applications requiring operation below -40°C, the Molex part provides additional low-temperature capability. Both parts support the full upper temperature range of 105°C.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the M20-7890442 and 0901481204 are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. Both are classified under ECCN EAR99 and HTSUS 8536.69.4040.

Q: What packaging format is available for both parts?

A: Both parts are supplied in tube packaging, suitable for automated assembly and manual handling in production environments.

Q: How do the insulation materials differ between these parts?

A: The M20-7890442 uses PA6T Nylon 6T insulation, while the 0901481204 uses glass-filled PBT (Polybutylene Terephthalate). Both materials provide adequate mechanical strength and electrical insulation for the specified applications. Material selection may influence thermal and chemical resistance characteristics in specific environments.