PJ-021-SMT-1 Equivalent & Substitute Parts

Part Overview

The PJ-021-SMT-1 is a power barrel connector jack manufactured by CUI Devices, designed for surface mount, right-angle applications. This connector features a 1.75mm ID / 4.75mm OD barrel configuration with 2 conductors and 3 contacts, rated for 16VDC at 5A. The product is currently obsolete, making identification of suitable substitute components essential for ongoing design support, maintenance, and production continuity.

Substiute Parts

PJ-021-SMT-1

CUI DevicesIn Stock: 994PJ-021-SMT-1 Datasheet

Current PartRFQ

PJ1-021-SMT-TR

CUI DevicesIn Stock: 1197PJ1-021-SMT-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The PJ1-021-SMT-TR qualifies as a functional substitute for the PJ-021-SMT-1 based on the following critical parameters:

Matching Parameters:

• Connector type: Jack (Male)
• Mounting configuration: Surface Mount, Right Angle
• Contact count: 2 Conductors, 3 Contacts
• Internal switch: Single Switch, Normally Closed
• Current rating: 5A
• Termination method: Solder
• Operating temperature range: -25°C ~ 85°C
• Housing material: Polyamide (PA6T), Nylon 6T
• Contact material: Brass, Copper Alloy with Silver Plating
• Flammability rating: UL94 V-0
• Moisture sensitivity: MSL 1 (Unlimited)

Allowable Variations:

• Mating diameter: 1.70mm ID (0.067") vs. 1.75mm ID (0.068") — actual measured diameters are identical (0.065" ID, 0.203" OD)
• Voltage rating: 24VDC vs. 16VDC — higher rating provides margin for 16VDC applications
• Mating depth: 0.319" (8.10mm) vs. 0.315" (8.00mm) — negligible difference
• Packaging: Tape & Reel (TR) vs. bulk — does not affect electrical or mechanical compatibility
• Product status: Active vs. Obsolete — substitute is in active production

Parameter Comparison

Engineering Selection Recommendations

The PJ1-021-SMT-TR is the designated substitute for the obsolete PJ-021-SMT-1. Selection is based on the following engineering criteria:

Electrical Compatibility: The substitute maintains identical current rating (5A) and operating temperature range (-25°C ~ 85°C). The increased voltage rating (24VDC vs. 16VDC) provides additional design margin without compromising performance in 16VDC applications.

Mechanical Compatibility: Actual measured barrel diameters are identical (0.065" ID, 0.203" OD), ensuring mating compatibility with existing plug connectors. Mounting configuration, contact count, and internal switch function are unchanged.

Material & Compliance: Both connectors use identical housing material (Polyamide PA6T, Nylon 6T) and contact materials (Brass, Copper Alloy with Silver Plating). Both meet UL94 V-0 flammability requirements and MSL 1 moisture sensitivity specifications. The substitute carries ROHS3 compliance, meeting current regulatory standards.

Production Status: The PJ1-021-SMT-TR is in active production with confirmed inventory availability (1138 pcs), ensuring supply chain continuity for new designs and production support of existing applications.

Frequently Asked Questions (FAQ)

Q: Can the PJ1-021-SMT-TR be used as a direct replacement for the PJ-021-SMT-1?

A: Yes. The substitute maintains identical actual barrel diameters (0.065" ID, 0.203" OD), contact configuration, mounting type, and electrical ratings. The connectors are mechanically and electrically compatible for direct substitution.

Q: What is the difference between the 1.75mm and 1.70mm mating diameter specifications?

A: The industry-recognized specifications differ (1.75mm vs. 1.70mm EIAJ-3), but actual measured diameters are identical (0.065" ID). This represents a standardization difference between specifications rather than a functional variation. Mating compatibility is confirmed.

Q: Does the higher voltage rating (24VDC vs. 16VDC) affect compatibility?

A: No. The higher voltage rating of the substitute provides additional design margin and does not compromise performance in 16VDC applications. The connector is rated for the higher voltage and is fully compatible with lower-voltage designs.

Q: What is the significance of the "Board Guide" feature listed for the substitute?

A: The Board Guide is a mechanical alignment feature that aids in assembly but does not affect electrical compatibility or mating function. This feature enhances manufacturing precision without changing the connector's electrical or mechanical interface.

Q: Does the packaging difference (Tape & Reel vs. bulk) affect the connector itself?

A: No. Tape & Reel (TR) packaging is a supply format for automated assembly processes. The connector component itself is identical regardless of packaging format. Selection between packaging options depends on manufacturing process requirements, not electrical or mechanical compatibility.

Q: Are there any compliance or regulatory differences between the two connectors?

A: Both connectors meet UL94 V-0 flammability requirements and MSL 1 moisture sensitivity specifications. The substitute carries ROHS3 compliance, which supersedes the RoHS compliance of the original part, ensuring alignment with current regulatory standards.