H/MS3108B20-29SW Circular Connector Equivalent & Substitute Parts

Part Overview

The H/MS3108B20-29SW is a 17-position circular connector plug with female sockets and solder cup termination manufactured by Hirose Electric Co Ltd. This connector is designed for applications requiring IP67/IP68 ingress protection with threaded fastening and right-angle mounting configuration. The original part (H/MS3108B20-29SW(74)) is classified as obsolete, necessitating identification of functionally equivalent alternatives for continued system support and procurement.

Key Parameters

Parameter	Specification
Connector Type	Plug, Female Sockets
Number of Positions	17
Shell Size - Insert	20-29
Termination	Solder Cup
Mounting Type	Free Hanging (In-Line), Right Angle
Fastening Type	Threaded
Ingress Protection	IP67/IP68 - Dust Tight, Waterproof
Current Rating	13A
Voltage Rating	500VAC, 700VDC
Operating Temperature	-40°C ~ 125°C
Shell Material	Aluminum Alloy
Shell Finish	Black Chromate
Contact Finish - Mating	Silver
Contact Material	Copper Alloy

Substitute Part Grouping Explanation

Substitution eligibility for the H/MS3108B20-29SW is determined by strict equivalence across the following critical parameters:

Connector type and gender (Plug, Female Sockets)
Position count (17 positions)
Shell size classification (20-29)
Termination method (Solder Cup)
Mounting configuration (Free Hanging, Right Angle)
Fastening mechanism (Threaded)
Electrical ratings (13A current, 500VAC/700VDC voltage)
Environmental sealing (IP67/IP68)
Temperature range (-40°C ~ 125°C)
Material composition (Aluminum Alloy shell, Copper Alloy contacts)
Contact finish specification (Silver plating)

The H/MS3108B20-29SW(34) meets all substitution criteria as an active product within the H/MS series, providing direct functional replacement capability.

Parameter Comparison

Parameter	H/MS3108B20-29SW(74) - Main Part	H/MS3108B20-29SW(34) - Substitute
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd
Product Status	Obsolete	Active
Connector Type	Plug, Female Sockets	Plug, Female Sockets
Number of Positions	17	17
Shell Size - Insert	20-29	20-29
Termination	Solder Cup	Solder Cup
Mounting Type	Free Hanging (In-Line), Right Angle	Free Hanging (In-Line), Right Angle
Fastening Type	Threaded	Threaded
Shell Material	Aluminum Alloy	Aluminum Alloy
Shell Finish	Black Chromate	Black Chromate
Contact Finish - Mating	Silver	Silver
Contact Material	Copper Alloy	Copper Alloy
Color	Black	Black
Ingress Protection	IP67/IP68 - Dust Tight, Waterproof	IP67/IP68 - Dust Tight, Waterproof
Current Rating (Amps)	13A	13A
Voltage Rating	500VAC, 700VDC	500VAC, 700VDC
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C
Backshell Material, Plating	Zinc Alloy, Black Chromate	Zinc Alloy, Black Chromate
Series	H/MS	H/MS
ECCN	EAR99	EAR99
HTSUS	8536.69.4020	8536.69.4020

Engineering Selection Recommendations

The H/MS3108B20-29SW(34) is the direct functional equivalent for the obsolete H/MS3108B20-29SW(74). Both parts maintain identical electrical, mechanical, and environmental specifications across all critical parameters. The substitute part carries active product status, ensuring ongoing availability and supply chain continuity.

The H/MS3108B20-29SW(34) is RoHS Compliant, providing enhanced environmental compliance for applications subject to regulatory requirements. Both parts are classified under ECCN EAR99 and HTSUS 8536.69.4020, maintaining consistent export and tariff classification.

The insert material differs between the two variants: the original part uses Polybutylene Terephthalate (PBT), while the substitute employs Polyphenylene Sulfide (PPS). Both materials are thermoplastic polymers suitable for the specified operating temperature range and electrical environment. This material substitution does not affect functional compatibility or performance within the defined application parameters.

Frequently Asked Questions (FAQ)

Q: Can H/MS3108B20-29SW(34) directly replace H/MS3108B20-29SW(74) in existing assemblies?

A: Yes. Both parts are mechanically and electrically identical across all functional parameters. The connector type, position count, shell size, termination method, mounting configuration, and electrical ratings are equivalent. Direct substitution is supported without design modification.

Q: What is the significance of the different insert materials (PBT vs. PPS)?

A: Both Polybutylene Terephthalate (PBT) and Polyphenylene Sulfide (PPS) are thermoplastic materials rated for the operating temperature range of -40°C to 125°C. The material substitution does not affect electrical performance, mechanical fit, or environmental sealing characteristics within the specified application envelope.

Q: Why is the original part classified as obsolete?

A: Product status reflects manufacturer lifecycle decisions. The H/MS3108B20-29SW(34) provides continued access to equivalent functionality within the active H/MS series product line.

Q: Are there compliance differences between the two parts?

A: The H/MS3108B20-29SW(34) carries RoHS Compliant certification. Both parts maintain identical ECCN (EAR99) and HTSUS (8536.69.4020) classifications. Regulatory compliance requirements should be evaluated based on specific application jurisdiction.

Q: What is the inventory status for the substitute part?

A: The H/MS3108B20-29SW(34) has 1064 pieces in new original stock, providing immediate availability for procurement.

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