TMM-105-03-LM-D Equivalent & Substitute Parts

Part Overview

The TMM-105-03-LM-D is a rectangular connector header manufactured by Samtec Inc., designed for through-hole board-to-board or cable applications. This vertical header features 10 positions arranged in 2 rows with 0.079" (2.00mm) pitch spacing. The connector is actively produced and ROHS3 compliant, making it suitable for general-purpose electronic assemblies requiring reliable solder termination and push-pull fastening.

Equivalent and substitute parts are identified when design requirements permit tolerance in specific parameters such as contact finish composition, insulation material, or contact length variations, while maintaining core electrical and mechanical compatibility.

Substiute Parts

TMM-105-03-LM-D

Samtec Inc.In Stock: 1047TMM-105-03-LM-D Datasheet

Current PartRFQ

0877581016

MolexIn Stock: 137860877581016 Datasheet

SimilarRFQ

0877581017

MolexIn Stock: 33090877581017 Datasheet

SimilarRFQ

M22-2580505

Harwin Inc.In Stock: 1744M22-2580505 Datasheet

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M22-2580546

Harwin Inc.In Stock: 1930M22-2580546 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TMM-105-03-LM-D are qualified based on the following critical parameters that must remain constant:

• Connector type (Header)
• Contact type (Male Pin)
• Number of positions (10)
• Number of rows (2)
• Pitch spacing (0.079" / 2.00mm)
• Row spacing (0.079" / 2.00mm)
• Mounting type (Through Hole)
• Termination method (Solder)
• Fastening type (Push-Pull)
• Contact shape (Square)
• Insulation height (0.059" / 1.50mm)

Variations permitted in substitute parts include contact finish composition, contact finish thickness, insulation material formulation, contact length dimensions, and operating temperature range, provided the connector maintains mechanical and electrical compatibility with the mating interface.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance, ensuring continued availability and regulatory alignment with the original TMM-105-03-LM-D.

The Molex 0877581016 and 0877581017 (Milli-Grid 87758 series) provide direct mechanical and electrical compatibility with identical pitch, row spacing, contact shape, and insulation height. These parts feature breakaway functionality and are available in higher inventory quantities. The primary differences are insulation material composition (polyamide versus liquid crystal polymer) and contact finish thickness variations.

The Harwin M22-2580505 and M22-2580546 (M22 series) maintain core compatibility but feature extended contact length dimensions (0.197" mating length versus 0.157" on the original). These parts include cuttable header functionality and operate within a narrower temperature range (-40°C to 105°C versus -55°C to 125°C). The M22-2580546 uses tin finish on the mating contact surface, while the M22-2580505 specifies gold finish. Current rating on Harwin parts is specified at 1A per contact, lower than the 3.2A rating of the original part.

Selection should account for application-specific requirements regarding operating temperature range, current capacity, and contact finish specifications.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0877581016 or 0877581017 be used as direct replacements for the TMM-105-03-LM-D?

A: Yes. Both Molex parts maintain identical pitch spacing (0.079" / 2.00mm), row configuration (2 rows, 10 positions), mounting type (through hole), and termination method (solder). The breakaway feature provides additional functionality. Differences in insulation material and contact finish thickness do not affect mechanical or electrical compatibility at the mating interface.

Q: What are the key differences between the Molex and Harwin substitute options?

A: The Molex Milli-Grid 87758 series (0877581016, 0877581017) maintains contact length dimensions identical to the original TMM-105-03-LM-D. The Harwin M22 series features extended mating contact length (0.197" versus 0.157") and reduced post length. Harwin parts operate at a lower maximum temperature (-40°C to 105°C) and specify lower current capacity (1A per contact). Harwin headers include cuttable functionality, allowing individual position separation.

Q: Are there packaging differences between these substitute parts?

A: The TMM-105-03-LM-D and Harwin parts are supplied in bulk packaging. The Molex 0877581016 and 0877581017 are supplied in tray packaging. Packaging format does not affect component functionality but may influence procurement and handling procedures.

Q: Which substitute part should be selected for high-temperature applications?

A: The TMM-105-03-LM-D and Molex alternatives support the full operating range of -55°C to 125°C. The Harwin M22 series is rated only to 105°C maximum. For applications requiring operation above 105°C, the original TMM-105-03-LM-D or Molex equivalents are required.

Q: What is the significance of contact finish thickness variations?

A: Contact finish thickness affects durability and wear resistance during mating cycles. The TMM-105-03-LM-D specifies 10.0µin (0.25µm) gold finish on mating contacts. The Molex 0877581016 provides 15.0µin (0.38µm), and the 0877581017 provides 30.0µin (0.76µm). Thicker finishes provide extended contact life in high-cycle applications. All finishes are suitable for standard board-to-board connections.

Q: Can the Harwin M22-2580546 with tin mating finish replace the gold-finished TMM-105-03-LM-D?

A: Tin and gold finishes have different electrical and corrosion properties. The M22-2580546 tin finish is suitable for general-purpose applications but may not be appropriate for high-reliability or corrosive environments where gold finish is specified. Application requirements should determine finish selection.

Q: What current capacity should be considered when selecting a substitute?

A: The TMM-105-03-LM-D is rated at 3.2A per contact. The Harwin M22 series is rated at 1A per contact. For applications requiring current capacity above 1A per contact, the original TMM-105-03-LM-D or Molex alternatives must be used. The Molex parts do not specify current rating; design verification is required for high-current applications.