PJ-034B Equivalent & Substitute Parts

Part Overview

The PJ-034B is a power barrel connector jack manufactured by CUI Devices, designed for through-hole mounting with 2.50mm ID and 5.50mm OD dimensions. This connector accommodates 2 conductors across 3 contacts with a single normally closed internal switch. The part is rated for 16VDC at 2.5A and operates across -25°C to 85°C. The product status is obsolete, making equivalent substitutes necessary for ongoing design requirements and procurement.

Key Parameters

Parameter	Value
Connector Type	Jack
Gender	Male
Industry Recognized Mating Diameter	2.50mm ID (0.098"), 5.50mm OD (0.217")
Number of Positions/Contacts	2 Conductors, 3 Contacts
Internal Switch(s)	Single Switch, Normally Closed
Mounting Type	Through Hole
Termination	Solder
Voltage - Rated	16VDC
Current Rating (Amps)	2.5 A
Operating Temperature	-25°C ~ 85°C
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS Compliant
Contact Material - Plating	Tin
Housing Material	Polybutylene Terephthalate (PBT)
Body Color	Black

Substitute Part Grouping Explanation

Substitution eligibility for the PJ-034B is determined by strict alignment across the following critical parameters:

Connector type (Jack) and gender (Male)
Industry recognized mating diameter (2.50mm ID, 5.50mm OD)
Contact configuration (2 conductors, 3 contacts)
Internal switch specification (single switch, normally closed)
Mounting method (through hole solder termination)
Electrical ratings (voltage and current capacity)
Operating temperature range
Flammability and compliance certifications

The substitute part 694108402002 (Würth Elektronik, WR-DC series) meets these criteria with compatible mechanical and electrical specifications, though with enhanced ratings and active product status.

Parameter Comparison

Parameter	PJ-034B (CUI Devices)	694108402002 (Würth Elektronik)
Connector Type	Jack	Jack
Gender	Male	Male
Industry Recognized Mating Diameter	2.50mm ID (0.098"), 5.50mm OD (0.217")	2.50mm ID (0.098"), 5.50mm OD (0.217")
Actual Diameter	0.098" (2.50mm ID), 0.252" (6.40mm OD)	0.101" (2.55mm ID), 0.252" (6.40mm OD)
Number of Positions/Contacts	2 Conductors, 3 Contacts	2 Conductors, 3 Contacts
Internal Switch(s)	Single Switch, Normally Closed	Single Switch, Normally Closed
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Voltage - Rated	16VDC	20VDC
Current Rating (Amps)	2.5 A	3 A
Mating Length/Depth	0.374" (9.50mm)	0.354" (9.00mm)
Operating Temperature	-25°C ~ 85°C	-40°C ~ 85°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Contact Material - Plating	Tin	Tin
Housing Material	Polybutylene Terephthalate (PBT)	Polyamide (PA66), Nylon 6/6
Body Color	Black	Black
RoHS Status	RoHS Compliant	ROHS3 Compliant
Product Status	Obsolete	Active

Engineering Selection Recommendations

The 694108402002 (Würth Elektronik) serves as a direct functional substitute for the obsolete PJ-034B. Both connectors share identical mating geometry, contact configuration, and switching characteristics. The substitute part provides enhanced electrical ratings (20VDC, 3A versus 16VDC, 2.5A) and extended low-temperature operating range (-40°C versus -25°C), making it suitable for applications requiring the original specifications or greater performance margins.

Both parts maintain UL94 V-0 flammability compliance and tin-plated contacts. The substitute features ROHS3 compliance and REACH affected status, compared to the original RoHS compliance designation. Housing material differs (PA66 nylon versus PBT), though both materials meet the same flammability standard. The substitute part is currently in active production with documented inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the 694108402002 directly replace the PJ-034B in existing designs?

A: Yes. Both connectors share the same mating diameter (2.50mm ID, 5.50mm OD), contact count (2 conductors, 3 contacts), and switching configuration (single normally closed switch). Through-hole solder termination is identical. The substitute meets or exceeds the original electrical specifications.

Q: What are the differences in electrical ratings?

A: The 694108402002 is rated for 20VDC at 3A, compared to the PJ-034B at 16VDC at 2.5A. Applications operating within the original specifications will function with the substitute. The higher ratings provide additional design margin.

Q: How do the operating temperature ranges differ?

A: The PJ-034B operates from -25°C to 85°C. The 694108402002 extends the lower limit to -40°C while maintaining the same upper limit. Applications requiring operation below -25°C benefit from the substitute's extended range.

Q: Are there mechanical compatibility concerns?

A: Mating diameter and contact geometry are identical. Mating length differs slightly (9.50mm versus 9.00mm), which may affect mechanical fit in space-constrained applications. Housing material differs (PBT versus PA66 nylon), though both meet UL94 V-0 flammability requirements.

Q: What compliance certifications apply to the substitute?

A: The 694108402002 carries ROHS3 compliance and is REACH affected. The original PJ-034B is RoHS compliant. Both maintain UL94 V-0 flammability ratings and tin-plated contact materials.

Q: Is the substitute part currently available?

A: Yes. The 694108402002 is in active production status with documented inventory of 1372 pieces in stock, compared to the obsolete PJ-034B status.

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