Bourns 3540S-1-101 Wirewound Potentiometer Equivalent & Substitute Parts

Part Overview

The Bourns 3540S-1-101 is a 100 Ohm, 2W wirewound linear potentiometer designed for panel mount applications with a 10-turn adjustment mechanism. This component features a slotted actuator, solder lug termination, and operates across a 3600° rotation range. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations where this specification remains applicable.

Substiute Parts

3540S-1-101

Bourns Inc.In Stock: 9843540S-1-101 Datasheet

Current PartRFQ

3540S-1-101L

Bourns Inc.In Stock: 9933540S-1-101L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3540S-1-101 is determined by strict equivalence across the following critical parameters:

• Resistance value: 100 Ohms
• Power rating: 2W
• Taper characteristic: Linear
• Number of turns: 10
• Tolerance: ±5%
• Temperature coefficient: ±50ppm/°C
• Resistive material: Wirewound
• Termination: Solder Lug
• Mounting configuration: Panel Mount
• Physical dimensions: Round body 0.875" diameter with 3/8-32 bushing thread
• Actuator specifications: Slotted type, 0.812" length, 0.2497" diameter

The Bourns 3540S-1-101L qualifies as a direct substitute based on complete alignment with all electrical and mechanical parameters specified above.

Parameter Comparison

Engineering Selection Recommendations

The 3540S-1-101L serves as the direct active substitute for the obsolete 3540S-1-101. All electrical and mechanical parameters are identical, ensuring functional equivalence in circuit applications. The primary distinction lies in product status and regulatory compliance:

The substitute part maintains active production status through Bourns Inc., providing supply chain continuity for applications requiring this potentiometer specification. The 3540S-1-101L achieves ROHS3 compliance, addressing modern regulatory requirements that the original part does not meet. This compliance improvement is significant for applications subject to RoHS directives in manufacturing and distribution.

Both parts carry identical ECCN and HTSUS classifications, indicating no change in export control or tariff treatment. The substitute's REACH Affected status reflects current regulatory scope, whereas the original part's REACH Unaffected designation reflects its obsolete status prior to regulatory updates.

Selection of the 3540S-1-101L is appropriate for all applications previously specified for the 3540S-1-101, with the added benefit of regulatory compliance and ongoing manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the 3540S-1-101L be used as a direct replacement for the 3540S-1-101 in existing designs?

A: Yes. The 3540S-1-101L is electrically and mechanically identical to the 3540S-1-101 across all specified parameters. No circuit modifications or mechanical redesign is required for substitution.

Q: What is the primary reason for substituting the 3540S-1-101?

A: The 3540S-1-101 is classified as obsolete. The 3540S-1-101L is the active equivalent from Bourns Inc., ensuring continued availability and manufacturer support.

Q: Are there differences in packaging between these parts?

A: The 3540S-1-101 is supplied in standard packaging, while the 3540S-1-101L is supplied in bulk packaging. Both parts are identical in component specification and performance.

Q: Does the RoHS3 compliance of the 3540S-1-101L affect compatibility?

A: No. RoHS3 compliance is a manufacturing and material standard that does not alter electrical or mechanical performance. The substitute meets modern regulatory requirements while maintaining full functional equivalence.

Q: Are the physical dimensions identical between the two parts?

A: Yes. Both parts feature identical body diameter (0.875" / 22.23mm), bushing thread (3/8-32), actuator length (0.812" / 20.63mm), and actuator diameter (0.2497" / 6.34mm). Panel mount installation is identical.

Q: What is the inventory status of these parts?

A: The 3540S-1-101 has 910 pieces in stock as new original inventory. The 3540S-1-101L has 945 pieces in stock as new original inventory.