Equivalent & Substitute Parts for Molex 0878335021

Part Overview

The Molex 0878335021 is a rectangular connector header designed for through-hole, right-angle board-to-board or cable applications. This shrouded 50-position header operates across a wide temperature range and is widely used in automotive, general purpose, and telecommunications applications. The part is currently active in production with 861 units in stock. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements permit equivalent functionality.

Substiute Parts

0878335021

MolexIn Stock: 8970878335021 Datasheet

Current PartRFQ

TMMH-125-01-F-D-RA-ES

Samtec Inc.In Stock: 907TMMH-125-01-F-D-RA-ES Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0878335021 is determined by the following critical parameters:

• Connector type and contact type (Header, Male Pin)
• Mating pitch and row spacing (0.079" / 2.00mm)
• Position count and row configuration (50 positions, 2 rows)
• Mounting orientation (Through Hole, Right Angle)
• Termination method (Solder)
• Contact material (Phosphor Bronze)
• Compliance certifications (ROHS3, REACH Unaffected)

The Samtec Inc. TMMH-125-01-F-D-RA-ES meets these core substitution criteria. Both parts share identical mating pitch, position count, row configuration, mounting type, and termination method. Both are ROHS3 compliant and REACH unaffected. Differences in shrouding design, insulation material, and operating temperature range are noted in the parameter comparison table below.

Parameter Comparison

Engineering Selection Recommendations

Both the Molex 0878335021 and Samtec TMMH-125-01-F-D-RA-ES are active production parts with ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on the following provided specifications:

Shrouding configuration differs between the two parts. The Molex part features 4-wall shrouding, while the Samtec part is unshrouded with end shrouds. This difference affects mechanical fit and insertion force characteristics in mated applications.

Insulation material differs: Molex uses glass-filled polyamide, while Samtec uses liquid crystal polymer. Both materials are suitable for the specified operating temperature ranges.

Operating temperature range extends to 125°C for the Samtec part versus 105°C for the Molex part. Applications requiring operation above 105°C should specify the Samtec alternative.

Contact length at mating differs by 0.015" (0.40mm), with the Molex part providing longer mating contact length. This may affect insertion force and contact retention in specific mated connector designs.

Both parts are available in current inventory with comparable stock levels.

Frequently Asked Questions (FAQ)

Q: Can the Samtec TMMH-125-01-F-D-RA-ES directly replace the Molex 0878335021 in existing designs?

A: Both parts share identical mating pitch (0.079" / 2.00mm), position count (50), row configuration (2 rows), and mounting type (through-hole right-angle). However, the shrouding design differs. The Molex part is shrouded with 4 walls, while the Samtec part is unshrouded with end shrouds. Verify that your mated connector design accommodates the unshrouded configuration before substitution.

Q: What is the difference in contact length between these parts?

A: The Molex 0878335021 provides 0.141" (3.60mm) mating contact length, while the Samtec TMMH-125-01-F-D-RA-ES provides 0.126" (3.20mm). This 0.015" (0.40mm) difference may affect insertion force and contact retention characteristics depending on the mated connector design.

Q: Are both parts RoHS compliant?

A: Yes, both the Molex 0878335021 and Samtec TMMH-125-01-F-D-RA-ES are ROHS3 compliant and REACH unaffected.

Q: What is the maximum operating temperature for each part?

A: The Molex 0878335021 operates from -55°C to 105°C. The Samtec TMMH-125-01-F-D-RA-ES operates from -55°C to 125°C. For applications requiring operation above 105°C, the Samtec part is the appropriate selection.

Q: What insulation materials are used in each part?

A: The Molex 0878335021 uses glass-filled polyamide (PA/Nylon). The Samtec TMMH-125-01-F-D-RA-ES uses liquid crystal polymer (LCP). Both materials are suitable for the specified operating temperature ranges.

Q: Are both parts available in stock?

A: Yes, the Molex 0878335021 has 861 units in stock, and the Samtec TMMH-125-01-F-D-RA-ES has 820 units in stock.