PJ-021 Equivalent & Substitute Parts

Part Overview

The PJ-021 is a power barrel connector jack manufactured by CUI Devices with 1.75mm ID (0.068") and 4.75mm OD (0.187") dimensions. This through-hole, right-angle jack features a single normally closed internal switch and supports 5A at 16VDC. The part is currently obsolete, making identification of suitable substitutes essential for ongoing system support and component procurement.

Substiute Parts

PJ-021

CUI DevicesIn Stock: 1005PJ-021 Datasheet

Current PartRFQ

PJ1-021

CUI DevicesIn Stock: 5209PJ1-021 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PJ-021 is determined by strict equivalence across the following critical parameters:

Mechanical Compatibility: Connector type (jack), gender (male), mating diameter (1.75mm ID / 4.75mm OD), mounting configuration (through-hole, right-angle), and contact count (2 conductors, 3 contacts) must remain identical.

Electrical Compatibility: Current rating (5A) and internal switch configuration (single switch, normally closed) must be maintained. Voltage rating of the substitute must equal or exceed the original 16VDC specification.

Environmental & Compliance: Operating temperature range (-25°C ~ 85°C), material flammability rating (UL94 V-0), and RoHS compliance status must be preserved.

Termination Method: While the original part uses solder termination, substitutes with alternative termination methods (such as kinked pin) may be acceptable if mechanical and electrical parameters remain equivalent and the substitute is confirmed compatible with the application circuit.

Parameter Comparison

Engineering Selection Recommendations

The PJ1-021 serves as a direct functional substitute for the obsolete PJ-021. Both parts maintain identical mechanical dimensions, contact configuration, and electrical current capacity. The PJ1-021 offers improved voltage rating (24VDC versus 16VDC), providing additional operational margin. The substitute employs kinked pin termination rather than solder termination; this difference requires verification that the application circuit accommodates kinked pin connection methods.

The PJ1-021 carries active product status with ROHS3 compliance, ensuring continued availability and regulatory alignment. Both parts share identical operating temperature ranges and UL94 V-0 flammability ratings, confirming environmental equivalence.

Frequently Asked Questions (FAQ)

Q: Can PJ1-021 replace PJ-021 in all applications?

A: Mechanical and electrical parameters are equivalent. The primary consideration is termination method: PJ1-021 uses kinked pin termination while PJ-021 uses solder termination. Verify that your circuit board design accommodates kinked pin connection before substitution.

Q: What is the difference in voltage rating between these parts?

A: PJ-021 is rated for 16VDC while PJ1-021 is rated for 24VDC. The higher rating of PJ1-021 provides additional operational margin and does not restrict use in 16VDC applications.

Q: Are both parts RoHS compliant?

A: Yes. PJ-021 is RoHS Compliant and PJ1-021 is ROHS3 Compliant. Both meet RoHS requirements for hazardous substance restrictions.

Q: What is the mating diameter specification?

A: Both parts feature 1.75mm ID (0.068") and 4.75mm OD (0.187") mating diameters. Actual measured diameters are 0.065" (1.65mm ID) and 0.203" (5.15mm OD).

Q: How many contacts does each connector have?

A: Both PJ-021 and PJ1-021 feature 2 conductors with 3 total contacts and include a single normally closed internal switch.

Q: What is the current rating for these connectors?

A: Both parts are rated for 5A continuous current.