Nidec 1309P103 Trimmer Potentiometer - Equivalent & Substitute Parts

Part Overview

The Nidec Components Corporation 1309P103 is a 10 kOhm wirewound trimmer potentiometer rated at 0.5W with PC pin termination and side adjustment capability. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing production and maintenance applications. The 19-turn adjustment mechanism and through-hole mounting configuration define its primary application scope in legacy electronic assemblies.

Substiute Parts

1309P103

Nidec Components CorporationIn Stock: 10571309P103 Datasheet

Current PartRFQ

3290P-1-103

Bourns Inc.In Stock: 22803290P-1-103 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1309P103 is determined by the following critical parameters that must remain constant or compatible:

• Resistance value: 10 kOhms (exact match required)
• Termination style: PC Pins (through-hole mounting compatibility)
• Adjustment type: Side Adjustment (functional interface requirement)
• Resistive material: Wirewound (performance characteristic)
• Temperature coefficient: ±50ppm/°C (thermal stability requirement)

Parameters that may vary within acceptable engineering tolerances for substitution:

• Power rating: Substitute may equal or exceed 0.5W
• Tolerance: Substitute may be tighter (lower tolerance value acceptable)
• Number of turns: Substitute may differ if adjustment resolution remains adequate
• Physical dimensions: Substitute may differ if mounting footprint accommodates PCB layout

The Bourns 3290P-1-103 meets all critical substitution criteria while offering enhanced specifications in power rating and tolerance.

Parameter Comparison

Engineering Selection Recommendations

The Bourns 3290P-1-103 is the qualified substitute for the obsolete Nidec 1309P103 based on the following engineering criteria:

All critical electrical parameters align: 10 kOhm resistance, ±50ppm/°C temperature coefficient, wirewound construction, and side adjustment mechanism are identical. Both components maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

The Bourns substitute provides enhanced specifications: 1W power rating versus 0.5W, and ±5% tolerance versus ±10%. These improvements ensure the substitute will perform within or exceed the original design envelope in power dissipation and resistance accuracy.

The Bourns component is in active production status, ensuring long-term availability and supply chain continuity. The 25-turn adjustment mechanism provides finer resolution compared to the 19-turn original, which may improve calibration precision in applications requiring fine-tuning.

Physical dimension differences require PCB layout verification. The rectangular face (9.53mm x 3.81mm) differs from the square original (9.50mm x 9.50mm). Confirm mounting hole spacing and clearance compatibility before implementation.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 3290P-1-103 directly replace the Nidec 1309P103 without circuit modification?

A: Electrical substitution is direct. The 10 kOhm resistance, temperature coefficient, and adjustment mechanism are identical. Physical mounting must be verified due to different face dimensions. No circuit redesign is required if PCB layout accommodates the rectangular footprint.

Q: Why does the substitute have a higher power rating (1W vs 0.5W)?

A: Higher power rating indicates greater thermal capacity and is compatible with applications designed for 0.5W. The substitute will not introduce thermal issues in the original circuit; it simply provides additional margin.

Q: What is the impact of the 25-turn versus 19-turn difference?

A: The 25-turn mechanism provides finer adjustment resolution. This is functionally compatible and may improve calibration precision. No adverse effects result from the increased turn count.

Q: Are both components RoHS compliant?

A: Yes. Both the Nidec 1309P103 and Bourns 3290P-1-103 are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: What is the primary reason for substitution?

A: The Nidec 1309P103 is obsolete. The Bourns 3290P-1-103 is in active production, ensuring availability for new builds and field replacements.

Q: Does the tighter tolerance (±5% vs ±10%) affect compatibility?

A: No. Tighter tolerance is a specification improvement. Components manufactured to ±5% tolerance will fall within the ±10% acceptance range of the original design.

Q: Must PCB layout be modified for the Bourns substitute?

A: PCB layout compatibility depends on mounting hole spacing and clearance. The rectangular face dimension (9.53mm x 3.81mm) differs from the square original (9.50mm x 9.50mm). Verify hole pattern and component clearance before board implementation.