SMD4FRA021 Equivalent & Substitute Parts

Part Overview

The SMD4FRA021 is a 4-position circular connector receptacle with female sockets designed for solder termination. Manufactured by Switchcraft Inc., this Mini DIN connector features through-hole, right-angle mounting with push-pull fastening and keyed orientation. The connector is rated for 1A–2A current and 100VAC/12VDC voltage, making it suitable for communication systems, instrumentation, and medical applications. Product status is active with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Identifying equivalent substitute parts is necessary when the primary part becomes unavailable, when supply chain optimization is required, or when alternative sourcing reduces procurement costs while maintaining functional compatibility.

Substiute Parts

SMD4FRA021

Switchcraft Inc.In Stock: 895SMD4FRA021 Datasheet

Current PartRFQ

5749181-1

TE Connectivity AMP ConnectorsIn Stock: 93765749181-1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMD4FRA021 is determined by strict alignment with the following critical parameters:

• Connector Type & Gender: Must be receptacle with female sockets
• Position Count: Must be 4-position configuration
• Shell Size: Must be Mini DIN form factor
• Mounting Configuration: Must support through-hole, right-angle mounting
• Termination Method: Must use solder termination
• Fastening & Orientation: Must feature push-pull fastening with keyed orientation
• Electrical Characteristics: Current rating minimum 1A; voltage rating minimum 12VDC
• Material & Compliance: Thermoplastic shell, copper alloy contacts with gold finish, UL94 V-0 rated, RoHS3 compliant

The substitute part 5749181-1 (TE Connectivity AMP Connectors) meets all mandatory substitution criteria across connector type, position count, shell size, mounting method, termination, fastening, orientation, material composition, and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

Both the SMD4FRA021 and 5749181-1 are active products with full RoHS3 compliance and unlimited moisture sensitivity ratings. Selection between these parts should be based on:

Primary Selection (SMD4FRA021): Use when Switchcraft sourcing is preferred, when the 2A current rating is required, or when 100VAC operation is specified in the application.

Substitute Selection (5749181-1): Use when TE Connectivity supply chain is more favorable, when higher voltage margin (30VDC vs. 12VDC) provides additional design headroom, or when operating temperature specification (-55°C ~ 105°C) is required for the application. The 1A current rating is suitable for applications not exceeding this threshold.

Both parts carry identical regulatory certifications (RoHS3, UL94 V-0) and material specifications, ensuring functional interchangeability within the defined electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can 5749181-1 directly replace SMD4FRA021 in all applications?

A: Yes, provided the application current requirement does not exceed 1A. The substitute part meets all mechanical, electrical, and regulatory requirements for 4-position Mini DIN solder receptacles with push-pull fastening. If the application requires 2A current capability, the SMD4FRA021 must be used.

Q: What are the key compatibility criteria for these connectors?

A: Compatibility is determined by: 4-position configuration, Mini DIN shell size, through-hole right-angle mounting, solder termination, push-pull keyed fastening, shielded design, copper alloy contacts with gold finish, thermoplastic shell, and UL94 V-0 flammability rating.

Q: Does the operating temperature specification affect substitution?

A: The SMD4FRA021 does not specify an operating temperature range, while 5749181-1 specifies -55°C ~ 105°C. If the application requires documented temperature performance, 5749181-1 provides explicit specification. If temperature operation is not a design constraint, both parts are functionally equivalent.

Q: Are there packaging differences between these parts?

A: SMD4FRA021 packaging is not specified in available data. 5749181-1 is supplied in tube packaging. Verify packaging requirements with your procurement process.

Q: What is the voltage rating difference, and does it matter?

A: SMD4FRA021 is rated 100VAC/12VDC; 5749181-1 is rated 30VDC. For DC applications at 12V or below, both parts are suitable. The 30VDC rating of 5749181-1 provides additional voltage margin for higher-voltage DC applications.