MCX Connector Jack 75 Ohm Right Angle PCB (133-8701-301)

Part Overview

The Cinch Connectivity Solutions Johnson 133-8701-301 is an MCX connector jack designed for 75 ohm coaxial applications. This female socket connector features right-angle through-hole mounting with solder termination, suitable for PCB integration in RF and video signal transmission systems. The part is active in production with 1076 units currently in stock. Equivalent and substitute parts are identified to support design flexibility, procurement alternatives, and supply chain continuity when the primary part becomes unavailable or when system impedance requirements differ.

Key Parameters

Parameter	Value
Manufacturer Part Number	133-8701-301
Manufacturer	Cinch Connectivity Solutions Johnson
Connector Style	MCX
Connector Type	Jack, Female Socket
Impedance	75 Ohms
Mounting Type	Through Hole, Right Angle
Contact Termination	Solder
Frequency - Max	6 GHz
Operating Temperature	-65°C ~ 165°C
Voltage Rating	335 V
Mating Cycles	500
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of MCX connectors is determined by the following critical parameters: connector style (MCX), connector type (jack/female socket), mounting configuration (through hole, right angle), contact and shield termination method (solder), and impedance rating (50 ohms or 75 ohms). Frequency capability, operating temperature range, voltage rating, and mating cycle specifications must remain equal to or exceed the original part requirements.

Substitute parts are grouped into two categories:

Direct Impedance Match (75 Ohms): Parts 133-8701-311, 252129-75, and 85_MCX-75-0-1/111_NE maintain the 75 ohm impedance specification of the primary part. These are suitable for direct replacement in applications where impedance matching is critical.

Parametric Equivalent (50 Ohms): Parts 133-3701-301, 133-3701-311, 133-3701-321, 29K203-400L5, 85_MCX-50-0-16/111_NH, 85_MCX-S50-0-25/111_NM, and R113665000 operate at 50 ohm impedance. These are suitable only in applications designed for 50 ohm systems and are not interchangeable with the 75 ohm primary part in impedance-critical circuits.

Parameter Comparison

Part Number	Manufacturer	Impedance	Connector Type	Mounting	Frequency Max	Operating Temp	Voltage Rating	Mating Cycles	RoHS Status
133-8701-301	Cinch Connectivity Solutions Johnson	75 Ohms	Jack, Female Socket	Through Hole, Right Angle	6 GHz	-65°C ~ 165°C	335 V	500	RoHS Compliant
133-8701-311	Cinch Connectivity Solutions Johnson	75 Ohms	Jack, Female Socket	Through Hole, Right Angle	6 GHz	-65°C ~ 165°C	335 V	500	ROHS3 Compliant
133-3701-301	Cinch Connectivity Solutions Johnson	50 Ohms	Jack, Female Socket	Through Hole, Right Angle	6 GHz	-65°C ~ 165°C	335 V	500	ROHS3 Compliant
133-3701-311	Cinch Connectivity Solutions	50 Ohms	Jack, Female Socket	Through Hole, Right Angle	6 GHz	-65°C ~ 165°C	335 V	500	ROHS3 Compliant
133-3701-321	Cinch Connectivity Solutions	50 Ohms	Jack, Female Socket	Through Hole, Right Angle	6 GHz	-65°C ~ 165°C	335 V	500	ROHS3 Compliant
252129-75	Amphenol RF	75 Ohms	Receptacle, Female Socket	Through Hole, Right Angle	6 GHz	-65°C ~ 165°C	Not Specified	500	ROHS3 Compliant
29K203-400L5	Rosenberger	50 Ohms	Jack, Female Socket	Through Hole, Right Angle	6 GHz	-55°C ~ 155°C	335 V	500	ROHS3 Compliant
85_MCX-50-0-16/111_NH	Huber+Suhner, Inc.	50 Ohms	Jack, Female Socket	Through Hole, Right Angle	6 GHz	-55°C ~ 155°C	170 V	500	ROHS3 Compliant
85_MCX-75-0-1/111_NE	Huber+Suhner, Inc.	75 Ohms	Jack, Female Socket	Through Hole, Right Angle	6 GHz	-65°C ~ 165°C	170 V	500	ROHS3 Compliant
85_MCX-S50-0-25/111_NM	Huber+Suhner, Inc.	50 Ohms	Jack, Female Socket	Through Hole, Right Angle	6 GHz	-55°C ~ 155°C	170 V	500	ROHS3 Compliant
R113665000	Radiall USA, Inc.	50 Ohms	Jack, Female Socket	Through Hole, Right Angle	6 GHz	-55°C ~ 155°C	335 V	500	ROHS3 Compliant

Engineering Selection Recommendations

For 75 Ohm System Applications:

Part 133-8701-311 is the primary substitute for 133-8701-301. Both are manufactured by Cinch Connectivity Solutions Johnson, maintain identical electrical specifications (75 ohms, 6 GHz, 335 V, -65°C to 165°C), and share the same mechanical form factor. The upgrade from RoHS Compliant to ROHS3 Compliant status provides enhanced regulatory alignment. Inventory availability is 1314 units.

Part 85_MCX-75-0-1/111_NE from Huber+Suhner maintains 75 ohm impedance and the full operating temperature range (-65°C to 165°C). The voltage rating is reduced to 170 V, which may be limiting in high-voltage applications. This part is suitable for standard RF and video signal applications within the specified voltage envelope. Inventory availability is 992 units.

Part 252129-75 from Amphenol RF maintains 75 ohm impedance and 6 GHz frequency capability. The connector type is specified as receptacle rather than jack, which may affect mechanical compatibility depending on mating interface requirements. Voltage rating is not specified in the provided data. This part should be evaluated for mechanical fit before selection.

For 50 Ohm System Applications:

Parts 133-3701-301, 133-3701-311, and 133-3701-321 are Cinch Connectivity Solutions products with identical 50 ohm specifications and full compatibility with the mechanical and thermal envelope of the primary part. All three maintain 335 V voltage rating and -65°C to 165°C operating range. Selection among these three is based on inventory availability: 1326 units (133-3701-301), 1375 units (133-3701-311), and 986 units (133-3701-321).

Part R113665000 from Radiall USA maintains 50 ohm impedance, 335 V voltage rating, and 6 GHz frequency capability. Operating temperature range is -55°C to 155°C, which is narrower than the primary part. Inventory availability is 2326 units, the highest among all substitutes.

Parts 29K203-400L5 (Rosenberger), 85_MCX-50-0-16/111_NH, and 85_MCX-S50-0-25/111_NM (Huber+Suhner) operate at 50 ohms with reduced voltage ratings (170 V for Huber+Suhner parts, 335 V for Rosenberger) and narrower operating temperature ranges (-55°C to 155°C). These parts are suitable for standard-voltage RF applications.

Frequently Asked Questions (FAQ)

Q: Can I use a 50 ohm MCX connector in place of the 75 ohm primary part?

A: No. Impedance is a critical parameter in RF and video signal transmission. Using a 50 ohm connector in a 75 ohm system will cause signal reflections, insertion loss, and degraded performance. Substitution is only valid when the system design is confirmed to operate at 50 ohms.

Q: What is the difference between "Jack" and "Receptacle" connector types?

A: In MCX terminology, both jack and receptacle refer to female socket connectors designed to accept male plugs. The terms are used interchangeably by different manufacturers. Mechanical compatibility depends on the mating plug design and should be confirmed before substitution.

Q: Are all substitute parts RoHS compliant?

A: The primary part 133-8701-301 is RoHS Compliant. All listed substitute parts are ROHS3 Compliant, which represents a more recent regulatory standard. ROHS3 compliance is backward compatible with RoHS requirements and does not affect electrical or mechanical performance.

Q: What is the significance of operating temperature range differences?

A: The primary part operates from -65°C to 165°C. Some substitutes (Rosenberger, Huber+Suhner) operate from -55°C to 155°C. If your application requires operation below -55°C or above 155°C, these parts are not suitable. Verify the actual operating environment before selection.

Q: Does voltage rating affect connector selection?

A: Voltage rating indicates the maximum voltage the connector can safely handle. The primary part is rated 335 V. Huber+Suhner substitutes are rated 170 V. If your application operates above 170 V, these parts are not suitable. Rosenberger and Radiall parts maintain the 335 V rating.

Q: Can I substitute based on frequency capability alone?

A: No. All listed parts support 6 GHz operation, which is the maximum frequency of the primary part. However, frequency capability is only one parameter. Impedance, voltage rating, operating temperature, and mechanical form factor must also match or exceed the primary part requirements for the application.

Q: What does MSL (Moisture Sensitivity Level) mean?

A: MSL 1 (Unlimited) indicates the part has no moisture sensitivity restrictions and requires no special handling or storage conditions. All listed substitutes maintain MSL 1 status, ensuring consistent handling requirements.

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