Equivalent & Substitute Parts for 68521WA4PL461

Part Overview

The 68521WA4PL461 is a 21-position D-Sub combo connector manufactured by NorComp Inc., featuring 17 signal positions plus 4 coaxial positions in a right-angle solder configuration. This connector is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, maintenance, and new production requirements where original stock becomes unavailable.

Substiute Parts

68521WA4PL461

NorComp Inc.In Stock: 97968521WA4PL461 Datasheet

Current PartRFQ

L77TWC21WA4PMCSV4RRM6

Amphenol ICC (Commercial Products)In Stock: 1164L77TWC21WA4PMCSV4RRM6 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 68521WA4PL461 is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Connector style: D-Sub, Combo configuration
• Position count: 21 positions (17 signal + 4 coax)
• Shell size and layout: 4 (DC, C) - 21WA4
• Connector type: Plug with male pins
• Mounting orientation: Right angle
• Termination method: Solder
• Contact configuration: Coax and signal mixed

Allowable Variations:

• Shell material finish (nickel plated vs. tin plated)
• Contact finish thickness specifications
• Flange feature type (housing/shell vs. board side)
• Operating temperature upper limit (125°C minimum acceptable)
• Dielectric material composition (PBT vs. thermoplastic alternatives)
• Voltage rating presence or absence

The Amphenol ICC L77TWC21WA4PMCSV4RRM6 qualifies as a substitute based on identical position count, shell layout, connector type, right-angle orientation, and solder termination. Differences in mounting approach (panel mount vs. board edge), shell finish (tin vs. nickel), and operating temperature ceiling do not preclude functional equivalence in applications where these variations are acceptable.

Parameter Comparison

Engineering Selection Recommendations

The L77TWC21WA4PMCSV4RRM6 from Amphenol ICC represents a functionally equivalent substitute for the obsolete 68521WA4PL461. Selection between these parts should be based on the following engineering considerations:

Compliance and Regulatory Status: Both parts maintain RoHS compliance, satisfying environmental and regulatory requirements. The Amphenol ICC part carries active product status with ongoing manufacturer support, whereas the NorComp part is obsolete with no future availability assurance.

Thermal Performance: The Amphenol ICC substitute extends the operating temperature ceiling to 155°C compared to the NorComp specification of 125°C. This provides additional thermal margin in applications approaching the original upper limit.

Electrical Specifications: The Amphenol ICC part specifies a 300V voltage rating, whereas the NorComp part does not provide this specification. Applications requiring explicit voltage rating documentation should reference the Amphenol ICC datasheet.

Mechanical Mounting: The primary difference lies in mounting approach. The NorComp part uses board edge mounting, while the Amphenol ICC part employs panel mount configuration. PCB layout and mechanical housing design must accommodate this difference.

Shell Finish: Nickel plating on the NorComp part contrasts with tin plating on the Amphenol ICC part. Both finishes provide corrosion resistance; material compatibility with surrounding components should be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the L77TWC21WA4PMCSV4RRM6 directly replace the 68521WA4PL461 without PCB redesign?

A: Direct replacement requires evaluation of mounting configuration differences. The NorComp part uses board edge mounting while the Amphenol ICC part uses panel mount. If the original design accommodates panel mount through-hole positioning, direct substitution is feasible. Otherwise, PCB layout modification is necessary.

Q: Are the coaxial contact positions identical between these connectors?

A: Both connectors maintain the 21WA4 shell layout with 4 coaxial positions integrated with 17 signal positions. Contact arrangement and spacing are equivalent.

Q: Does the higher operating temperature of the Amphenol ICC part affect compatibility?

A: The extended temperature range (-55°C to 155°C versus -55°C to 125°C) provides additional thermal capability without reducing compatibility. Applications operating within the original -55°C to 125°C window remain fully compatible.

Q: What is the impact of shell finish differences on long-term reliability?

A: Both nickel and tin plating provide corrosion resistance suitable for standard industrial environments. Selection should consider specific environmental exposure, contact material compatibility, and existing system specifications.

Q: Are solder termination specifications identical?

A: Both connectors use solder termination. Specific solder pad geometry and thermal characteristics should be verified against PCB design files to ensure manufacturing compatibility.

Q: How does the voltage rating specification affect part selection?

A: The Amphenol ICC part explicitly specifies 300V rating. If the application requires documented voltage rating certification, the Amphenol ICC part provides this specification. The NorComp part's lack of specified voltage rating does not indicate lower capability but rather reflects original documentation practices.