TE Connectivity AMP Connectors 553921-1 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 553921-1 is a 50 position receptacle connector featuring free hanging (in-line) mounting with IDC (Insulation Displacement Contact) termination. This connector is part of the CHAMP .085 series and incorporates outer shroud contacts with latch lock features. The part is currently active in production with 1105 pieces available in new original stock.

Substitute parts become necessary when specific packaging requirements, compliance certifications, or inventory constraints necessitate alternative part numbers that maintain identical electrical and mechanical functionality.

Substiute Parts

553921-1

TE Connectivity AMP ConnectorsIn Stock: 1211553921-1 Datasheet

Current PartRFQ

5553921-1

TE Connectivity AMP ConnectorsIn Stock: 13255553921-1 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 5553921-1 is functionally equivalent to the main part 553921-1 based on the following critical parameters that determine substitution validity:

Electrical and Mechanical Equivalence Criteria:

• Identical connector type (Receptacle)
• Identical position count (50 positions)
• Identical row configuration (2 rows)
• Identical mounting type (Free Hanging/In-Line)
• Identical termination method (IDC)
• Identical connector style (Outer Shroud Contacts)
• Identical series designation (CHAMP .085)
• Identical flange feature (Housing/Shell 4-40)
• Identical contact finish material and thickness (Gold, 30.0µin)
• Identical latch lock feature

Differentiating Factors: The substitute part differs only in packaging format (Tray versus unspecified packaging for main part), RoHS compliance status (ROHS3 Compliant versus Not Applicable), and moisture sensitivity level (MSL 1 Unlimited versus Not Applicable). These differences do not affect the core electrical or mechanical function of the connector.

Parameter Comparison

Engineering Selection Recommendations

Both the 553921-1 and 5553921-1 connectors are active production parts from TE Connectivity AMP Connectors and are electrically and mechanically interchangeable for all circuit design and assembly applications.

Selection Criteria Based on Provided Specifications:

The 553921-1 is the primary part number when packaging format is not a constraint and RoHS compliance is not required for the application.

The 5553921-1 substitute part is selected when:

• Tray packaging is required for automated assembly or inventory management
• ROHS3 compliance certification is mandated by application or regulatory requirements
• Higher inventory availability is needed (1306 pieces versus 1105 pieces)
• Moisture sensitivity level documentation (MSL 1 Unlimited) is required for supply chain tracking

Both parts maintain identical electrical performance, mechanical fit, and functional characteristics within the CHAMP .085 series connector family.

Frequently Asked Questions (FAQ)

Q: Are the 553921-1 and 5553921-1 connectors electrically identical?

A: Yes. Both connectors are 50 position receptacles with identical contact configuration, termination method (IDC), contact finish (gold, 30.0µin), and all electrical specifications. They are direct functional equivalents.

Q: What is the primary difference between these two part numbers?

A: The primary difference is packaging format. The 5553921-1 is supplied in Tray packaging, while the 553921-1 packaging format is not specified. Additionally, the 5553921-1 carries ROHS3 compliance certification and defined moisture sensitivity level (MSL 1 Unlimited), whereas the 553921-1 lists these as Not Applicable.

Q: Can I use 5553921-1 as a direct replacement for 553921-1 in my assembly?

A: Yes. The 5553921-1 is a direct mechanical and electrical substitute. The connector will function identically in the same circuit and assembly application. Packaging differences do not affect connector performance.

Q: Does the RoHS compliance difference affect compatibility?

A: No. RoHS compliance is a material composition and manufacturing process certification. Both parts are functionally equivalent. The RoHS3 compliance of the 5553921-1 indicates it meets additional environmental standards, but this does not change the electrical or mechanical interface.

Q: Are both parts currently available?

A: Yes. Both 553921-1 (1105 pieces) and 5553921-1 (1306 pieces) are listed as active production parts with new original stock available.

Q: Which part should I specify for a new design?

A: Either part is suitable for new designs. If ROHS3 compliance is required by your application or customer specifications, specify 5553921-1. If packaging format is critical for your assembly process, verify the specific packaging requirements before selection.

Q: Is the Tray packaging of 5553921-1 compatible with automated pick-and-place equipment?

A: Tray packaging is standard for automated assembly processes. The 5553921-1 in Tray format is suitable for high-volume automated assembly operations.