MMS-125-01-L-SH Equivalent & Substitute Parts

Part Overview

The MMS-125-01-L-SH is a 25-position receptacle connector manufactured by Samtec Inc., designed for board-to-board or cable applications with through-hole, right-angle mounting. This connector features a 0.079" (2.00mm) pitch, gold-plated mating contacts, and operates across the temperature range of -55°C to 125°C. The part is currently active in production with 1077 units in stock.

Identifying equivalent and substitute parts is necessary when the primary part becomes unavailable, when design revisions require alternative sourcing options, or when supply chain optimization requires qualified alternatives that maintain identical electrical and mechanical performance.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Number of Positions	25
Pitch - Mating	0.079" (2.00mm)
Mounting Type	Through Hole, Right Angle
Contact Type	Female Socket
Contact Finish - Mating	Gold
Termination	Solder
Current Rating	3.9A per Contact
Operating Temperature	-55°C ~ 125°C
Insulation Material	Liquid Crystal Polymer (LCP)

Substitute Part Grouping Explanation

Substitution eligibility for the MMS-125-01-L-SH is determined by strict equivalence across the following critical parameters:

Connector Type & Contact Configuration: Receptacle with female socket contacts
Position Count & Pitch: 25 positions at 0.079" (2.00mm) mating pitch
Mounting & Termination: Through-hole, right-angle orientation with solder termination
Electrical Performance: 3.9A per contact current rating and operating temperature range of -55°C to 125°C
Contact Materials & Finish: Gold-plated mating contacts (10.0µin thickness) with phosphor bronze contact material
Insulation Properties: Liquid Crystal Polymer (LCP) insulation in black color

Parts meeting all these criteria are classified as direct substitutes. Deviations in any parameter disqualify a part from substitution consideration.

Parameter Comparison

Parameter	MMS-125-01-L-SH (Main Part)	MMS-125-01-L-SH (Substitute)
Manufacturer	Samtec Inc.	Samtec Inc.
Series	MMS	MMS
Connector Type	Receptacle	Receptacle
Contact Type	Female Socket	Female Socket
Number of Positions	25	25
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder
Contact Finish - Mating	Gold	Gold
Contact Finish Thickness - Mating	10.0µin (0.25µm)	10.0µin (0.25µm)
Insulation Color	Black	Black
Insulation Height	0.079" (2.00mm)	0.079" (2.00mm)
Contact Length - Post	0.120" (3.05mm)	0.120" (3.05mm)
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Contact Material	Phosphor Bronze	Phosphor Bronze
Current Rating	3.9A per Contact	3.9A per Contact
Insulation Material	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Active	Discontinued at DiGi Electronics
Inventory Status	1077 Pcs New Original In Stock	1106 Pcs New Original In Stock

Engineering Selection Recommendations

The substitute part MMS-125-01-L-SH maintains complete electrical and mechanical equivalence to the main part across all specified parameters. Both parts are manufactured by Samtec Inc. within the MMS series and share identical connector specifications, contact configurations, and performance ratings.

The primary distinction between the two parts is product status: the main part is currently active in production, while the substitute part is discontinued at DiGi Electronics. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for applications requiring environmental compliance certification.

Selection between these parts should be based on availability and supply chain requirements. The main part (MMS-125-01-L-SH, Active) is recommended for new designs and long-term production runs. The substitute part remains electrically and mechanically interchangeable for existing designs or applications where inventory from alternative sources is available.

Frequently Asked Questions (FAQ)

Q: Are these parts mechanically interchangeable?

A: Yes. Both parts share identical mounting type (through-hole, right-angle), insulation height (0.079"), contact length (0.120"), and all mechanical dimensions. They mount identically on PCBs and mate with the same connector interfaces.

Q: Can the substitute part be used in place of the main part without design changes?

A: Yes. The substitute part meets all electrical and mechanical specifications of the main part, including current rating (3.9A per contact), operating temperature range (-55°C to 125°C), contact finish (gold, 10.0µin), and insulation material (LCP). No design modifications are required.

Q: What is the difference between these two part numbers?

A: Both parts carry the identical part number MMS-125-01-L-SH. The distinction lies in product status: one is active in production while the other is discontinued at DiGi Electronics. Electrical and mechanical specifications are identical.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

Q: What determines substitution eligibility for this connector?

A: Substitution requires equivalence across connector type (receptacle), position count (25), mating pitch (0.079"), mounting configuration (through-hole right-angle), contact type (female socket), contact finish (gold), termination method (solder), current rating (3.9A), operating temperature (-55°C to 125°C), and insulation material (LCP). Deviations in any parameter disqualify substitution.

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