172-E50-202-011 D-Sub 50 Position Receptacle Connector

Part Overview

The 172-E50-202-011 is a 50 position D-Sub receptacle connector manufactured by NorComp Inc., designed for panel mount applications with female socket contacts. This connector is part of the 172-E series and features solder cup termination for permanent circuit board integration. The part is currently in stock with 1109 units available as new original inventory.

Equivalent and substitute parts within the 172-E series maintain the same core electrical and mechanical specifications, allowing direct replacement in applications where the primary connector becomes unavailable or where alternative packaging or finish specifications are required.

Key Parameters

Parameter	Specification
Connector Style	D-Sub
Connector Type	Receptacle, Female Sockets
Number of Positions	50
Number of Rows	3
Shell Size, Connector Layout	5 (DD, D)
Mounting Type	Panel Mount
Termination	Solder Cup
Shell Material, Finish	Steel, Tin Plated or Nickel Plated
Contact Finish	Gold, Flash
Current Rating	5A
Operating Temperature	-50°C ~ 100°C
Dielectric Material	Polybutylene Terephthalate (PBT)
Wire Gauge	20-26 AWG
Contact Material	Brass
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution within the 172-E series is determined by strict equivalence across the following critical parameters:

Connector type and style (D-Sub receptacle, female sockets)
Position count and row configuration (50 positions, 3 rows)
Shell size and layout (Size 5, DD/D configuration)
Mounting method (panel mount)
Termination type (solder cup)
Electrical ratings (5A current, operating temperature range)
Material specifications (PBT dielectric, brass contacts, gold finish)
Compliance certifications (UL94 V-0, ROHS3)

Variations in shell finish (tin plated versus nickel plated) and product status (active versus obsolete) do not affect functional interchangeability when these core parameters remain constant. Packaging format differences (tray versus bulk) represent logistics considerations only and do not impact electrical or mechanical compatibility.

Parameter Comparison

Parameter	172-E50-202-011	172-E50-202R011	172-E50-203R011
Manufacturer	NorComp Inc.	NorComp Inc.	NorComp Inc.
Connector Type	Receptacle, Female Sockets	Receptacle, Female Sockets	Receptacle, Female Sockets
Number of Positions	50	50	50
Number of Rows	3	3	3
Shell Size, Connector Layout	5 (DD, D)	5 (DD, D)	5 (DD, D)
Mounting Type	Panel Mount	Panel Mount	Panel Mount
Termination	Solder Cup	Solder Cup	Solder Cup
Shell Material, Finish	Steel, Tin Plated	Steel, Tin Plated	Steel, Nickel Plated
Contact Finish	Gold, Flash	Gold, Flash	Gold, Flash
Current Rating	5A	5A	5A
Operating Temperature	-50°C ~ 100°C	-50°C ~ 100°C	-50°C ~ 100°C
Dielectric Material	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)
Wire Gauge	20-26 AWG	20-26 AWG	20-26 AWG
Contact Material	Brass	Brass	Brass
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Obsolete	Active
Inventory (Pcs)	1109	847	850

Engineering Selection Recommendations

The 172-E50-202-011 and 172-E50-203R011 are both active products with current manufacturer support and full ROHS3 compliance. The 172-E50-202R011 is marked as obsolete and should be selected only when legacy system compatibility or existing inventory constraints require it.

For new designs and production applications, 172-E50-202-011 (tin plated shell) and 172-E50-203R011 (nickel plated shell) are functionally equivalent. Shell finish selection depends on environmental corrosion resistance requirements and application-specific specifications. Nickel plating provides enhanced corrosion resistance in harsh environments, while tin plating is suitable for standard industrial applications.

All three parts maintain identical electrical performance, mechanical fit, and compliance certifications. Substitution between these parts does not require circuit redesign or mechanical modification.

Frequently Asked Questions (FAQ)

Q: Can 172-E50-202R011 be used as a direct replacement for 172-E50-202-011?

A: Yes. Both parts are electrically and mechanically equivalent. The 172-E50-202R011 is obsolete but maintains identical specifications for connector type, position count, shell size, termination method, current rating, and operating temperature range. Substitution is valid from a technical standpoint, though the active status of 172-E50-202-011 makes it the preferred choice for new applications.

Q: What is the difference between 172-E50-202-011 and 172-E50-203R011?

A: The primary difference is shell finish. The 172-E50-202-011 features a tin plated steel shell, while 172-E50-203R011 features a nickel plated steel shell. All other electrical and mechanical parameters are identical. Shell finish selection is based on environmental corrosion resistance requirements.

Q: Are these connectors compatible with standard D-Sub 50 position cables?

A: These connectors conform to D-Sub size 5 (DD, D) configuration with 50 positions in a 3-row layout. Compatibility with specific cables depends on the mating connector type and pin configuration of the cable assembly.

Q: What packaging formats are available?

A: The 172-E50-202-011 is available in standard packaging. The 172-E50-202R011 and 172-E50-203R011 are supplied in tray packaging. Packaging format does not affect electrical or mechanical performance.

Q: Are all three parts RoHS compliant?

A: Yes. All three parts (172-E50-202-011, 172-E50-202R011, and 172-E50-203R011) are ROHS3 compliant and REACH unaffected.

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