WW3JB1R00 Equivalent & Substitute Parts

Part Overview

The WW3JB1R00 is a 1 Ohm ±5% 3W axial wirewound resistor manufactured by Stackpole Electronics Inc. This through-hole component features moisture-resistant construction and operates across a wide temperature range from -55°C to 350°C. The part is Active in product status with 815 units currently in stock. Equivalent and substitute parts are identified when design requirements permit variations in power rating, physical dimensions, or manufacturer while maintaining core electrical specifications.

Key Parameters

Parameter	Value
Resistance	1 Ohms
Tolerance	±5%
Power Rating	3W
Composition	Wirewound
Package Type	Axial
Temperature Coefficient	±50ppm/°C
Operating Temperature Range	-55°C ~ 350°C
Features	Moisture Resistant
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the WW3JB1R00 is determined by the following criteria:

Mandatory Matching Parameters:

Resistance value: 1 Ohms
Tolerance: ±5%
Composition: Wirewound
Package type: Axial
Temperature coefficient: ±50ppm/°C
Number of terminations: 2

Allowable Variation Parameters:

Power rating: Equal to or greater than 3W
Physical dimensions: May vary within axial package constraints
Operating temperature range: Must encompass or equal the original range
Manufacturer: Different manufacturers permitted
Packaging format: Bulk or Cut Tape acceptable
Moisture resistance: Feature may be present or absent

Five substitute parts meet these criteria across three manufacturers: Stackpole Electronics Inc, Vishay Dale, and Ohmite.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff	Op Temp Range	Size (mm)	Moisture Resistant	RoHS Status
WW3JB1R00	Stackpole Electronics Inc	1 Ohm	±5%	3	±50ppm/°C	-55°C ~ 350°C	4.75 x 14.22	Yes	ROHS3
WW5JT1R00	Stackpole Electronics Inc	1 Ohm	±5%	5	±50ppm/°C	-55°C ~ 350°C	7.92 x 22.23	Yes	ROHS3
CW02B1R000JE70	Vishay Dale	1 Ohm	±5%	3.75	±50ppm/°C	-65°C ~ 350°C	4.78 x 14.27	Yes	ROHS3
45J1R0E	Ohmite	1 Ohm	±5%	5	±50ppm/°C	-55°C ~ 275°C	8.70 x 23.80	No	RoHS Compliant
ALSR031R000JE12	Vishay Dale	1 Ohm	±5%	3	±50ppm/°C	-65°C ~ 250°C	4.57 x 12.70	Yes	ROHS3
ALSR051R000JE12	Vishay Dale	1 Ohm	±5%	5	±50ppm/°C	-65°C ~ 250°C	7.92 x 22.23	Yes	ROHS3

Engineering Selection Recommendations

Stackpole WW5JT1R00: Manufacturer-recommended substitute with identical series lineage. Provides increased power dissipation capacity (5W vs 3W) while maintaining moisture resistance and ROHS3 compliance. Larger physical dimensions require PCB layout verification. Identical operating temperature range.

Vishay Dale CW02B1R000JE70: Direct manufacturer alternative with comparable physical dimensions to the original part. Intermediate power rating (3.75W) bridges the gap between 3W and 5W designs. Extended lower temperature limit (-65°C vs -55°C) provides additional thermal margin. ROHS3 compliant with moisture resistance.

Ohmite 45J1R0E: Manufacturer-recommended option with 5W power rating. Lacks moisture-resistant feature; suitable only for applications where moisture resistance is not required. Largest physical footprint among substitutes. Operating temperature range limited to -55°C ~ 275°C; verify compatibility if application requires operation above 275°C. RoHS compliant.

Vishay Dale ALSR031R000JE12: Equivalent power rating (3W) with smallest physical dimensions. Moisture-resistant construction. Operating temperature range limited to -65°C ~ 250°C; verify compatibility if application requires operation above 250°C. ROHS3 compliant.

Vishay Dale ALSR051R000JE12: 5W power rating with moisture resistance and ROHS3 compliance. Operating temperature range limited to -65°C ~ 250°C; verify compatibility if application requires operation above 250°C.

Frequently Asked Questions (FAQ)

Q: Can WW5JT1R00 be used as a direct replacement for WW3JB1R00?

A: Yes. Both parts share identical electrical specifications (1 Ohm, ±5%, ±50ppm/°C), composition (wirewound), package type (axial), and operating temperature range (-55°C ~ 350°C). The WW5JT1R00 provides higher power dissipation (5W vs 3W). Physical dimensions differ; verify PCB layout accommodates the larger size (7.92mm x 22.23mm vs 4.75mm x 14.22mm).

Q: What is the key difference between Stackpole and Vishay Dale substitutes?

A: Stackpole WW series maintains the original operating temperature range (-55°C ~ 350°C). Vishay Dale ALSR series limits operation to -65°C ~ 250°C. Select based on application temperature requirements. Both manufacturers provide moisture-resistant variants with ROHS3 compliance.

Q: Is the Ohmite 45J1R0E suitable for moisture-sensitive applications?

A: No. The 45J1R0E lacks moisture-resistant features present in the original WW3JB1R00 and other substitutes. Use only in applications where moisture resistance is not required.

Q: Can I use a 5W resistor in place of a 3W design?

A: Yes, provided PCB layout accommodates larger physical dimensions. Higher power rating provides additional thermal margin and does not degrade circuit performance. Verify space constraints before substitution.

Q: Which substitute offers the closest physical match to WW3JB1R00?

A: CW02B1R000JE70 (Vishay Dale) provides the closest dimensional match at 4.78mm x 14.27mm versus the original 4.75mm x 14.22mm. This minimizes PCB layout modifications.

Q: Are all substitutes RoHS compliant?

A: Yes. WW5JT1R00, CW02B1R000JE70, ALSR031R000JE12, and ALSR051R000JE12 are ROHS3 compliant. The Ohmite 45J1R0E is RoHS compliant. All meet regulatory requirements for restricted substance elimination.

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