CT-6EW503 Trimmer Potentiometer: Equivalent & Substitute Parts

Part Overview

The CT-6EW503 is a 50 kOhm, 0.5W through-hole trimmer potentiometer manufactured by Nidec Components Corporation. This cermet-based component features top adjustment, PC pin termination, and a square form factor (7.00mm x 7.00mm). The part is active in production and RoHS3 compliant. Equivalent and substitute parts are identified when applications require alternative sourcing, higher inventory availability, different form factors, or specific packaging requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

CT-6EW503

Nidec Components CorporationIn Stock: 817CT-6EW503 Datasheet

Current PartRFQ

25PR50KLF

TT Electronics/BIIn Stock: 1166425PR50KLF Datasheet

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3329H-1-503LF

Bourns Inc.In Stock: 64933329H-1-503LF Datasheet

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72PR50KLF

TT Electronics/BIIn Stock: 140172PR50KLF Datasheet

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82PR50KLF

TT Electronics/BIIn Stock: 110082PR50KLF Datasheet

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T73YE503KT20

Vishay SferniceIn Stock: 2396T73YE503KT20 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CT-6EW503 is determined by strict equivalence across the following critical parameters:

• Resistance value: 50 kOhms (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Tolerance: ±10% (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Number of turns: 1 Turn (exact match required)
• Adjustment type: Top Adjustment (exact match required)
• Resistive material: Cermet (exact match required)
• Mounting type: Through Hole (exact match required)
• Termination style: PC Pins (exact match required)

All identified substitute parts meet these electrical and mechanical criteria. Variations in physical dimensions (form factor) and packaging format are permitted substitution variables, as they do not affect electrical performance or circuit board integration when mounting footprints accommodate the alternative geometry.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active production components with full regulatory compliance. Selection among equivalents should be based on:

Inventory Availability: The 25PR50KLF (TT Electronics/BI) offers the highest stock level at 11,557 pieces, followed by the 3329H-1-503LF (Bourns) at 6,384 pieces. The CT-6EW503 maintains 778 pieces in stock.

Compliance Status: All substitutes maintain RoHS3 compliance or equivalent RoHS certification. The 3329H-1-503LF carries REACH Affected status, while all other parts are REACH Unaffected.

Form Factor Considerations: The CT-6EW503 and T73YE503KT20 share identical square/rectangular dimensions (7.00mm face), minimizing PCB layout modifications. The 25PR50KLF presents a marginally smaller square footprint (6.86mm). The 3329H-1-503LF and 82PR50KLF feature round form factors (6.35mm diameter), requiring different mounting hole patterns.

Packaging Format: Bulk packaging is available in CT-6EW503, 72PR50KLF, and 82PR50KLF. Tube packaging is standard for 25PR50KLF, 3329H-1-503LF, and T73YE503KT20.

Frequently Asked Questions (FAQ)

Q: Can I substitute the CT-6EW503 with any of the listed parts without circuit modification?

A: Yes, all listed parts are electrically equivalent. However, physical form factor differences (square vs. round, dimensional variations) may require PCB layout verification to confirm mounting hole compatibility. Consult your PCB design specifications before substitution.

Q: What is the primary difference between these substitute parts?

A: All parts share identical electrical specifications (50 kOhm, 0.5W, ±10%, ±100ppm/°C, 1-turn, top adjustment, cermet, through-hole, PC pins). Differences exist only in physical dimensions, packaging format, and manufacturer. These variations do not affect electrical performance.

Q: Are there any compliance concerns when switching between these parts?

A: All parts maintain RoHS3 compliance or equivalent RoHS certification. The 3329H-1-503LF is REACH Affected; all others are REACH Unaffected. Verify your application's regulatory requirements before selection.

Q: Which substitute offers the best availability?

A: The 25PR50KLF (TT Electronics/BI) provides the highest inventory at 11,557 pieces. For bulk packaging specifically, the 72PR50KLF and 82PR50KLF are available at 1,341 and 1,017 pieces respectively.

Q: Does form factor affect electrical performance?

A: No. Round and square form factors perform identically electrically. Form factor selection is driven by PCB layout constraints and mounting hole patterns only.

Q: Can I mix packaging formats in production?

A: Yes. Bulk and tube packaging contain identical components. Packaging format selection depends on assembly process requirements and handling procedures, not electrical compatibility.