TE Connectivity 3213X503M Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The TE Connectivity 3213X503M is a 50 kOhms surface mount trimmer potentiometer rated at 0.125W (1/8W) with J Lead termination and top adjustment capability. This component features cermet resistive material construction with a 1-turn adjustment mechanism housed in a compact square form factor measuring 3.40mm x 3.40mm.

The 3213X503M is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing production requirements, maintenance operations, and design continuity for applications currently utilizing this component.

Substiute Parts

3213X503M

TE Connectivity Passive ProductIn Stock: 10223213X503M Datasheet

Current PartRFQ

ST-32ETA503

Nidec Components CorporationIn Stock: 9417ST-32ETA503 Datasheet

DirectRFQ

22AR50KLFTR

TT Electronics/BIIn Stock: 1919922AR50KLFTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3213X503M are qualified based on electrical and mechanical parameter equivalence. The following parameters must match or remain within acceptable tolerances for direct substitution:

Critical Matching Parameters:

• Resistance value: 50 kOhms
• Power rating: 0.125W (1/8W)
• Tolerance: ±20%
• Temperature coefficient: ±100ppm/°C
• Number of turns: 1
• Adjustment type: Top Adjustment
• Resistive material: Cermet
• Mounting type: Surface Mount
• Termination style: J Lead
• Moisture sensitivity level: 1 (Unlimited)

Acceptable Variation:

• Physical dimensions may vary within manufacturing tolerances provided the component maintains surface mount compatibility and J Lead termination integrity
• RoHS compliance status may differ between substitute parts

Two substitute parts meet these criteria and are classified as follows:

Direct Equivalent (ST-32ETA503): Identical electrical specifications and matching physical dimensions (3.40mm x 3.40mm square face). Active product status with current manufacturing availability.

Functional Equivalent (22AR50KLFTR): Identical electrical specifications with minor dimensional variation (3.50mm x 3.20mm rectangular face). Active product status with current manufacturing availability.

Parameter Comparison

Engineering Selection Recommendations

ST-32ETA503 (Nidec Components Corporation) is the primary substitute for the 3213X503M. This part maintains identical electrical specifications and physical dimensions while offering active product status with established manufacturing continuity. ROHS3 compliance and REACH Unaffected status align with current regulatory requirements. This substitute provides direct compatibility without design modification.

22AR50KLFTR (TT Electronics/BI) is a functional equivalent substitute suitable for applications where minor dimensional variation is acceptable. The rectangular face geometry (3.50mm x 3.20mm) differs from the original square form factor (3.40mm x 3.40mm). This part maintains all critical electrical parameters and offers active product status. RoHS compliance and REACH Unaffected status satisfy regulatory requirements. PCB layout verification is necessary to confirm accommodation of the dimensional difference.

Both substitute parts are available in active production with established supply chains, eliminating the obsolescence constraint of the original 3213X503M component.

Frequently Asked Questions (FAQ)

Q: Can ST-32ETA503 be used as a direct replacement for 3213X503M without PCB modification?

A: Yes. The ST-32ETA503 maintains identical electrical specifications (50 kOhms, 0.125W, ±20% tolerance, ±100ppm/°C temperature coefficient) and matching physical dimensions (3.40mm x 3.40mm square face). J Lead termination and surface mount compatibility are identical. No PCB layout modification is required.

Q: What is the primary difference between ST-32ETA503 and 22AR50KLFTR?

A: Both parts share identical electrical specifications. The primary difference is physical form factor. ST-32ETA503 maintains the original square geometry (3.40mm x 3.40mm), while 22AR50KLFTR uses a rectangular geometry (3.50mm x 3.20mm). Electrical performance and functional operation are equivalent.

Q: Does the rectangular form factor of 22AR50KLFTR affect circuit performance?

A: No. The rectangular geometry does not alter electrical performance. The component delivers identical resistance, power handling, temperature coefficient, and adjustment characteristics. PCB layout accommodation must be verified to ensure the dimensional difference does not create physical interference or spacing violations.

Q: Are both substitute parts RoHS compliant?

A: Yes. ST-32ETA503 carries ROHS3 certification. 22AR50KLFTR carries RoHS certification. Both meet current environmental compliance requirements for electronic component manufacturing and use.

Q: What is the inventory status of substitute parts?

A: ST-32ETA503 has 9,346 pieces in current stock. 22AR50KLFTR has 19,136 pieces in current stock. Both parts are manufactured by active suppliers with established production capacity.

Q: Can these substitutes be used interchangeably in existing designs?

A: ST-32ETA503 is fully interchangeable without design modification. 22AR50KLFTR is functionally interchangeable but requires PCB layout verification due to dimensional differences. Both parts maintain the same electrical performance and adjustment characteristics.