WW1JB1R00 Equivalent & Substitute Parts

Part Overview

The WW1JB1R00 is a 1 Ohm, 5% tolerance, 1W 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 currently active in production with 941 units in stock. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits alternative sourcing from qualified manufacturers.

Key Parameters

Parameter	Value
Resistance	1 Ohms
Tolerance	±5%
Power Rating	1W
Composition	Wirewound
Package Type	Axial
Temperature Coefficient	±50ppm/°C
Terminations	2
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the WW1JB1R00 are qualified based on the following electrical and mechanical parameters:

Resistance value: 1 Ohms (exact match required)
Tolerance: ±5% (exact match required)
Power rating: 1W (exact match required)
Composition: Wirewound (exact match required)
Package: Axial through-hole (exact match required)
Temperature coefficient: ±50ppm/°C (exact match required)
Number of terminations: 2 (exact match required)
RoHS compliance: ROHS3 or equivalent (required for regulatory alignment)

The substitute parts ALSR011R000JE12 (Vishay Dale) and 41J1R0E (Ohmite) meet all core electrical specifications and package requirements. Variations in operating temperature range, physical dimensions, and MSL ratings do not affect functional substitutability for this resistor category.

Parameter Comparison

Parameter	WW1JB1R00 (Stackpole)	ALSR011R000JE12 (Vishay Dale)	41J1R0E (Ohmite)
Resistance	1 Ohms	1 Ohms	1 Ohms
Tolerance	±5%	±5%	±5%
Power Rating	1W	1W	1W
Composition	Wirewound	Wirewound	Wirewound
Package	Axial	Axial	Axial
Temperature Coefficient	±50ppm/°C	±50ppm/°C	±50ppm/°C
Operating Temperature Range	-55°C ~ 350°C	-65°C ~ 250°C	-55°C ~ 275°C
Physical Dimensions (Dia x L)	0.110" x 0.375" (2.79mm x 9.53mm)	0.110" x 0.406" (2.79mm x 10.31mm)	0.126" x 0.437" (3.20mm x 11.10mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
Inventory Availability	941 Pcs	872 Pcs	1222 Pcs

Engineering Selection Recommendations

All three parts meet the core electrical and mechanical requirements for 1 Ohm, 1W axial wirewound resistor applications. Selection should be based on the following factors:

WW1JB1R00 (Stackpole Electronics Inc): Primary choice when available. Offers the widest operating temperature range (-55°C to 350°C) and moisture-resistant construction. ROHS3 compliant with established supply chain presence.

ALSR011R000JE12 (Vishay Dale): Direct substitute with identical electrical specifications. Slightly larger axial length (0.406" vs 0.375"). ROHS3 compliant. Suitable for applications where the extended length does not create PCB layout constraints. MSL rating of 1 (Unlimited) provides flexibility for storage and handling.

41J1R0E (Ohmite): Qualified substitute with matching electrical parameters. Largest physical footprint (0.126" diameter, 0.437" length). RoHS compliant. Highest current inventory (1222 units). Suitable for applications with adequate PCB space and operating temperatures up to 275°C.

All parts carry ECCN EAR99 classification and HTSUS code 8533.21.0080, ensuring consistent export and tariff treatment.

Frequently Asked Questions (FAQ)

Q: Can ALSR011R000JE12 be used as a direct replacement for WW1JB1R00?

A: Yes. Both parts share identical resistance (1 Ohm), tolerance (±5%), power rating (1W), composition (wirewound), package type (axial), and temperature coefficient (±50ppm/°C). The primary difference is axial length: ALSR011R000JE12 measures 0.406" compared to WW1JB1R00 at 0.375". Verify PCB layout clearance before substitution.

Q: What are the temperature operating range differences, and do they affect substitutability?

A: WW1JB1R00 operates from -55°C to 350°C, ALSR011R000JE12 from -65°C to 250°C, and 41J1R0E from -55°C to 275°C. For applications operating within -55°C to 250°C, all three parts are functionally equivalent. For applications requiring operation above 250°C, WW1JB1R00 is the only qualified option.

Q: Are there physical dimension constraints when substituting 41J1R0E for WW1JB1R00?

A: Yes. The 41J1R0E has a larger diameter (0.126" vs 0.110") and length (0.437" vs 0.375"). Verify PCB footprint spacing, component density, and thermal management requirements before substitution.

Q: Do all substitute parts meet the same compliance standards?

A: WW1JB1R00 and ALSR011R000JE12 are ROHS3 compliant. 41J1R0E is RoHS compliant. All three carry ECCN EAR99 classification. Confirm compliance requirements for your specific application and region.

Q: What is the moisture sensitivity level (MSL) difference, and does it matter?

A: WW1JB1R00 has MSL listed as Not Applicable. ALSR011R000JE12 and 41J1R0E both have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. This does not affect functional performance but may influence storage and handling procedures.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message