CT20P503 Equivalent & Substitute Parts Reference

Part Overview

The CT20P503 is a 50 kOhm 0.5W through-hole trimmer potentiometer with PC pin termination, manufactured by Vishay Beyschlag/Draloric/BC Components. This component features cermet resistive material, 15-turn side adjustment, and rectangular form factor (6.40mm x 5.00mm). The part is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

CT20P503

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 980CT20P503 Datasheet

Current PartRFQ

CT-20EP503

Nidec Components CorporationIn Stock: 1127CT-20EP503 Datasheet

DirectRFQ

CT-20EX503

Nidec Components CorporationIn Stock: 848CT-20EX503 Datasheet

DirectRFQ

3006P-1-503

Bourns Inc.In Stock: 11093006P-1-503 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CT20P503 are identified based on strict electrical and mechanical parameter matching. The critical parameters determining substitution eligibility are:

• Resistance value: 50 kOhms (exact match required)
• Tolerance: ±10% (exact match required)
• Temperature Coefficient: ±100ppm/°C (exact match required)
• Number of Turns: 15 (exact match required)
• Adjustment Type: Side 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 substitutes meet these core electrical and mechanical specifications. Power rating variations and dimensional tolerances within the rectangular form factor are permissible within standard engineering practice for through-hole trimmer potentiometers.

Parameter Comparison

Engineering Selection Recommendations

CT-20EP503 and CT-20EX503 (Nidec Components Corporation): These parts are direct electrical and mechanical equivalents to the CT20P503. Both are manufactured by Nidec Components Corporation and maintain active product status. Both parts achieve ROHS3 compliance and REACH Unaffected status, making them suitable for applications requiring modern regulatory compliance. Inventory availability is strong for both variants.

3006P-1-503 (Bourns Inc.): This part is manufacturer-recommended as an equivalent and meets all core electrical and mechanical substitution criteria. The 3006P-1-503 provides a higher power rating (0.75W versus 0.5W), offering enhanced thermal margin in applications. Dimensional variation is minimal (6.35mm x 4.83mm versus 6.40mm x 5.00mm). The part maintains active product status but carries RoHS non-compliant status and REACH Affected designation, requiring evaluation against specific application compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can CT-20EP503 and CT-20EX503 be used interchangeably with CT20P503?

A: Yes. Both parts match all critical electrical parameters (50 kOhms, ±10% tolerance, ±100ppm/°C temperature coefficient, 15-turn adjustment) and mechanical specifications (cermet material, side adjustment, through-hole mounting, PC pin termination, identical form factor). Both are active products with improved regulatory compliance.

Q: What is the difference between CT-20EP503 and CT-20EX503?

A: Both parts are manufactured by Nidec Components Corporation and share identical electrical and mechanical specifications. The difference lies in the base product number designation (CT20EP versus CT20EX). Both are functionally equivalent substitutes for the CT20P503.

Q: Can 3006P-1-503 replace CT20P503 in all applications?

A: The 3006P-1-503 meets all core electrical and mechanical substitution criteria. The primary difference is the increased power rating (0.75W versus 0.5W), which provides additional thermal capacity. Dimensional variation is within standard tolerance for through-hole trimmer potentiometers. Applications must evaluate RoHS non-compliant and REACH Affected status against specific regulatory requirements.

Q: Are there packaging differences between these substitutes?

A: CT-20EP503 and CT-20EX503 are supplied in Bulk packaging. The 3006P-1-503 is supplied in Tube packaging. Packaging selection should align with procurement and assembly workflow requirements.

Q: What is the impact of the obsolete status of CT20P503?

A: The CT20P503 is no longer manufactured. Existing inventory (957 pieces) is available but finite. For new designs or long-term production, selection of an active substitute (CT-20EP503, CT-20EX503, or 3006P-1-503) is necessary to ensure supply chain continuity.