CT-94W-101 Equivalent & Substitute Parts

Part Overview

The CT-94W-101 is a 100 Ohm, 0.5W through-hole trimmer potentiometer manufactured by Vishay Beyschlag/Draloric/BC Components. This cermet-based trimmer features an 18-turn top adjustment mechanism with PC pin termination and is housed in a rectangular package measuring 9.60mm x 4.80mm. The part is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs requiring this specification class.

Substiute Parts

CT-94W-101

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 772CT-94W-101 Datasheet

Current PartRFQ

CT-94EW101

Nidec Components CorporationIn Stock: 11660CT-94EW101 Datasheet

DirectRFQ

3296W-1-101

Bourns Inc.In Stock: 45143296W-1-101 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CT-94W-101 is determined by strict equivalence across the following critical parameters:

• Resistance value: 100 Ohms
• Power rating: 0.5W (1/2W)
• Tolerance: ±10%
• Temperature coefficient: ±100ppm/°C
• Adjustment type: Top Adjustment
• Resistive material: Cermet
• Mounting type: Through Hole
• Termination style: PC Pins
• Package form factor: Rectangular configuration compatible with 9.60mm x 4.80mm footprint

The CT-94EW101 (Nidec Components Corporation) qualifies as a direct functional equivalent, maintaining identical electrical specifications and physical compatibility. The 3296W-1-101 (Bourns Inc.) provides electrical equivalence with a variation in turn count (25 turns versus 18 turns), which affects adjustment resolution but does not compromise circuit functionality for applications where the original 18-turn specification is not a critical design constraint.

Parameter Comparison

Engineering Selection Recommendations

CT-94EW101 (Nidec Components Corporation) is the primary substitute for the obsolete CT-94W-101. This part maintains complete electrical and mechanical equivalence with identical turn count, package dimensions, and all critical specifications. The CT-94EW101 is currently in active production status with RoHS3 compliance, making it suitable for new designs and legacy system support where regulatory compliance is required.

3296W-1-101 (Bourns Inc.) serves as a functional alternative when CT-94EW101 availability is constrained. This part meets all electrical specifications and maintains physical compatibility within standard PCB layout tolerances (package dimensions vary by 0.07mm and 0.03mm respectively). The primary distinction is the 25-turn configuration versus the original 18-turn design, resulting in finer adjustment resolution. This part is active in production but carries non-compliant RoHS status and REACH-affected designation, requiring evaluation against applicable regulatory requirements for the end application.

Frequently Asked Questions (FAQ)

Q: Can CT-94EW101 be used as a direct replacement for CT-94W-101 without circuit modification?

A: Yes. The CT-94EW101 maintains identical electrical specifications (100 Ohms, 0.5W, ±10% tolerance, ±100ppm/°C temperature coefficient) and physical dimensions (9.60mm x 4.80mm). No circuit modifications are required for functional substitution.

Q: What is the significance of the turn count difference between CT-94W-101 (18 turns) and 3296W-1-101 (25 turns)?

A: Turn count affects adjustment resolution. The 25-turn design provides finer granularity during potentiometer adjustment, approximately 1.39 times greater resolution per mechanical rotation. Both parts achieve the same resistance range and electrical performance; the difference impacts only the adjustment sensitivity and mechanical feel during calibration.

Q: Are there PCB layout considerations when substituting 3296W-1-101 for CT-94W-101?

A: Package dimensions differ slightly (9.53mm x 4.83mm versus 9.60mm x 4.80mm). These variations fall within standard PCB layout tolerances and do not require footprint redesign. Verify mechanical clearance in confined mounting areas before implementation.

Q: Which substitute part is recommended for new designs requiring RoHS compliance?

A: CT-94EW101 carries RoHS3 compliance certification and is the appropriate selection for applications subject to RoHS regulatory requirements. The 3296W-1-101 is non-compliant and unsuitable for RoHS-mandated applications.

Q: What inventory considerations apply to these substitute parts?

A: CT-94EW101 maintains higher stock levels (11,615 pcs) compared to 3296W-1-101 (4,420 pcs), providing greater availability for procurement planning. The original CT-94W-101 (688 pcs) is obsolete and should not be specified for new designs.