MS-166 Equivalent & Substitute Parts

Part Overview

The MS-166 is a coaxial switch receptacle connector manufactured by Hirose Electric Co Ltd, designed for 50 Ohm RF applications with a 2.80mm plug diameter. This surface mount component features an internal switch mechanism, gold-plated contacts, and operates across a frequency range up to 11 GHz. The MS-166 is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

MS-166

Hirose Electric Co LtdIn Stock: 1061MS-166 Datasheet

Current PartRFQ

MS-156C3

Hirose Electric Co LtdIn Stock: 39165MS-156C3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The MS-156C3 qualifies as a substitute for the MS-166 based on the following critical parameters that determine functional compatibility:

Matching Parameters:

• Impedance: 50 Ohms (identical)
• Connector Type: Receptacle, Female Socket (identical)
• Contact Termination: Solder (identical)
• Shield Termination: Solder (identical)
• Mounting Type: Surface Mount (identical)
• Fastening Type: Snap-On (identical)
• Frequency - Max: 11 GHz (identical)
• Number of Ports: 1 (identical)
• Features: Internal Switch (identical)
• Housing Color: Gold (identical)
• Body Material: Phosphor Bronze (identical)
• Body Finish: Gold (identical)
• Center Contact Plating: Gold (identical)
• Operating Temperature: -40°C ~ 85°C (identical)
• Insertion Loss: 0.4dB (identical)

Differing Parameters:

• Connector Style: 4mm Plug Dia (MS-156C3) vs 2.80mm Plug Dia (MS-166)
• Center Contact Material: Copper Alloy (MS-156C3) vs Beryllium Copper (MS-166)
• Dielectric Material: Polyamide (PA), Nylon 6T (MS-156C3) vs Liquid Crystal Polymer (LCP) (MS-166)
• Mating Cycles: 100 (MS-156C3) vs 50 (MS-166)
• Product Status: Active (MS-156C3) vs Obsolete (MS-166)

The MS-156C3 represents an active product with enhanced mating cycle capability and improved availability, making it suitable for applications where the 4mm plug diameter is mechanically compatible with the system design.

Parameter Comparison

Engineering Selection Recommendations

The MS-156C3 is the designated substitute for the obsolete MS-166. Selection of the MS-156C3 is supported by the following factors:

Product Status: The MS-156C3 maintains active product status with Hirose Electric Co Ltd, ensuring continued availability and manufacturing support. The MS-166 is classified as obsolete, limiting future procurement options.

Regulatory Compliance: The MS-156C3 carries ROHS3 compliance certification and REACH unaffected status, meeting current environmental and regulatory requirements for electronic component procurement.

Electrical Performance: Both components maintain identical electrical specifications including 50 Ohm impedance, 11 GHz maximum frequency, 0.4dB insertion loss, and equivalent operating temperature ranges.

Mechanical Compatibility: The primary design consideration is the connector style difference: MS-156C3 features a 4mm plug diameter versus the MS-166's 2.80mm plug diameter. System mechanical design must accommodate this dimensional change.

Reliability Enhancement: The MS-156C3 provides doubled mating cycle capability (100 cycles versus 50 cycles), offering improved durability for applications requiring frequent connector engagement.

Frequently Asked Questions (FAQ)

Q: What is the primary reason the MS-166 requires substitution? A: The MS-166 is classified as obsolete by the manufacturer. The MS-156C3 is the active equivalent that maintains all critical electrical specifications while providing improved availability and regulatory compliance.

Q: Are the electrical specifications identical between MS-166 and MS-156C3? A: Yes. Both components operate at 50 Ohms impedance, support frequencies to 11 GHz, and deliver 0.4dB insertion loss. Operating temperature ranges are identical at -40°C to 85°C.

Q: What is the key mechanical difference between these connectors? A: The MS-156C3 uses a 4mm plug diameter connector style, while the MS-166 uses a 2.80mm plug diameter. System mechanical design must be evaluated to confirm compatibility with the larger diameter.

Q: Does the MS-156C3 offer any performance advantages? A: The MS-156C3 provides doubled mating cycle capability (100 cycles versus 50 cycles), indicating enhanced durability for applications with frequent connector engagement.

Q: What packaging options are available for the MS-156C3? A: The MS-156C3 is supplied in Tape & Reel (TR) packaging format, suitable for automated assembly processes.

Q: Are there regulatory compliance differences? A: The MS-156C3 carries ROHS3 compliance and REACH unaffected status. The MS-166 does not list these certifications in available documentation.

Q: Can the MS-156C3 be used as a direct drop-in replacement? A: Electrical and thermal specifications are compatible. Mechanical integration requires confirmation that the 4mm plug diameter connector style accommodates existing mating components and PCB layout.