SM-3TA503 Equivalent & Substitute Parts

Part Overview

The SM-3TA503 is a 50 kOhm surface mount trimmer potentiometer manufactured by Nidec Components Corporation. This cermet-based trimmer is rated for 0.125W (1/8W) power dissipation with 11-turn side adjustment capability and J Lead termination. The part is currently in active production status with 716 units in stock. Equivalent substitute parts are identified when they maintain identical electrical specifications, mechanical compatibility, and functional performance characteristics within the allowed parameter tolerances for this product category.

Substiute Parts

SM-3TA503

Nidec Components CorporationIn Stock: 749SM-3TA503 Datasheet

Current PartRFQ

3223J-1-503E

Bourns Inc.In Stock: 77443223J-1-503E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SM-3TA503 are qualified based on the following critical parameters that determine functional and mechanical interchangeability:

• Resistance value: 50 kOhms (exact match required)
• Power rating: 0.125W minimum
• Tolerance: ±20% or better
• Temperature coefficient: ±100ppm/°C or better
• Number of turns: 11 (exact match required)
• Adjustment type: Side Adjustment (exact match required)
• Resistive material: Cermet (exact match required)
• Mounting type: Surface Mount (exact match required)
• Termination style: J Lead (exact match required)
• Moisture sensitivity: MSL 1 or better
• RoHS compliance: ROHS3 Compliant

The substitute part 3223J-1-503E from Bourns Inc. meets all critical electrical and mechanical parameters, enabling direct substitution in applications requiring the SM-3TA503.

Parameter Comparison

Engineering Selection Recommendations

Both the SM-3TA503 and 3223J-1-503E are active production parts with ROHS3 compliance and MSL 1 rating. The SM-3TA503 features a square face geometry (3.90mm x 3.90mm), while the 3223J-1-503E has a rectangular face (3.90mm x 3.18mm). All critical electrical parameters, power rating, tolerance, temperature coefficient, and functional characteristics are identical. Selection between these parts should be based on PCB layout requirements and available board space for the specific face dimension geometry.

Frequently Asked Questions (FAQ)

Q: Can the 3223J-1-503E directly replace the SM-3TA503 in my circuit?

A: Yes. Both parts share identical electrical specifications: 50 kOhm resistance, 0.125W power rating, ±20% tolerance, ±100ppm/°C temperature coefficient, 11-turn adjustment, cermet material, and J Lead termination. The primary consideration is the face dimension difference: the SM-3TA503 is square (3.90mm x 3.90mm) while the 3223J-1-503E is rectangular (3.90mm x 3.18mm). Verify your PCB layout accommodates the rectangular geometry before substitution.

Q: Are there compliance differences between these parts?

A: Both parts are ROHS3 compliant with MSL 1 rating. The SM-3TA503 carries REACH Unaffected status, while the 3223J-1-503E is REACH Affected. Both are classified under ECCN EAR99 and HTSUS 8533.40.8050.

Q: What determines if a part can substitute for the SM-3TA503?

A: Substitution requires matching all critical parameters: 50 kOhm resistance value, 0.125W power rating, ±20% tolerance, ±100ppm/°C temperature coefficient, 11-turn adjustment, side adjustment type, cermet resistive material, surface mount mounting, J Lead termination, and MSL 1 or better moisture sensitivity rating.

Q: Does the face dimension difference affect electrical performance?

A: No. The face dimension difference is a mechanical consideration only and does not affect electrical performance. The difference impacts only PCB layout compatibility and available mounting space.