Honeywell 343P5K Trimmer Potentiometer: Equivalent & Substitute Parts

Part Overview

The Honeywell 343P5K is a 5 kOhm, 0.75W through-hole trimmer potentiometer with cermet resistive material, side adjustment, and PC pin termination. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity. Substitute parts must maintain electrical specifications (5 kOhm resistance, 0.75W power rating, ±10% tolerance, ±100ppm/°C temperature coefficient) and mechanical compatibility (through-hole mounting, PC pins, side adjustment, rectangular form factor).

Substiute Parts

343P5K

Honeywell Sensing and Productivity SolutionsIn Stock: 808343P5K Datasheet

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3006P-1-502

Bourns Inc.In Stock: 21173006P-1-502 Datasheet

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89PR5KLF

TT Electronics/BIIn Stock: 173989PR5KLF Datasheet

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90PR5KLF

TT Electronics/BIIn Stock: 95190PR5KLF Datasheet

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M43P502KB40

Vishay SpectrolIn Stock: 1446M43P502KB40 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across core electrical and mechanical parameters. All substitute parts must satisfy the following criteria:

Mandatory Equivalence Parameters:

• Resistance: 5 kOhms (exact match required)
• Power Rating: 0.75W (exact match required)
• Tolerance: ±10% (exact match required)
• Temperature Coefficient: ±100ppm/°C (exact match required)
• Resistive Material: Cermet (exact match required)
• Mounting Type: Through Hole (exact match required)
• Termination Style: PC Pins (exact match required)
• Adjustment Type: Side Adjustment (exact match required)

Allowable Variation Parameters:

• Number of Turns: Variation permitted (15, 18, or 20 turns acceptable)
• Physical Dimensions: Minor variation permitted within rectangular form factor constraints
• Product Status: Active status preferred for new applications
• Packaging: Tube or Bulk formats acceptable
• Compliance Certifications: RoHS and REACH status may vary

Four active substitute parts meet these criteria and are grouped as direct electrical and mechanical equivalents.

Parameter Comparison

Engineering Selection Recommendations

For RoHS Compliance Requirements: Select 89PR5KLF, 90PR5KLF, or M43P502KB40. All three parts are RoHS compliant and active. The 89PR5KLF and 90PR5KLF are identical electrically and mechanically (both 20-turn, TT Electronics/BI Series 89) and maintain full RoHS compliance with MSL 1 (Unlimited). The M43P502KB40 (Vishay Spectrol Series 43) provides RoHS3 compliance with 18-turn adjustment.

For Non-RoHS Applications or Legacy Systems: The 3006P-1-502 (Bourns Trimpot® 3006 - Sealed) is electrically equivalent but operates with 15 turns and is RoHS non-compliant. This part is suitable only where RoHS compliance is not mandated.

For PCB Space Constraints: The 343P5K, 3006P-1-502, and M43P502KB40 share compact rectangular dimensions (approximately 0.250" x 0.190" face). The 89PR5KLF and 90PR5KLF feature larger 0.750" x 0.190" dimensions and require additional PCB real estate.

For Production Continuity: All four active substitutes (3006P-1-502, 89PR5KLF, 90PR5KLF, M43P502KB40) are available in production quantities. The 90PR5KLF and 89PR5KLF offer the closest electrical match (20-turn adjustment identical to the 343P5K) with active product status and full RoHS compliance.

Frequently Asked Questions (FAQ)

Q: Can the 3006P-1-502 substitute for the 343P5K in new designs?

A: The 3006P-1-502 is electrically equivalent (5 kOhm, 0.75W, ±10%, ±100ppm/°C, cermet) and mechanically compatible (through-hole, PC pins, side adjustment, compact form factor). However, it operates with 15 turns versus the 343P5K's 20 turns, affecting adjustment resolution. Additionally, the 3006P-1-502 is RoHS non-compliant. Selection depends on RoHS requirements and acceptable adjustment resolution for the application.

Q: What is the difference between the 89PR5KLF and 90PR5KLF?

A: Both parts are electrically and mechanically identical: 5 kOhm, 0.75W, 20-turn, cermet, through-hole, PC pins, side adjustment, RoHS compliant, MSL 1. Both are TT Electronics/BI Series 89 products with identical 0.750" x 0.190" dimensions. Selection between them is based on inventory availability and packaging preference (both supplied in Bulk).

Q: Does the M43P502KB40 provide equivalent adjustment resolution?

A: The M43P502KB40 operates with 18 turns compared to the 343P5K's 20 turns. This represents a 10% reduction in adjustment resolution. All other electrical parameters (5 kOhm, 0.75W, ±10%, ±100ppm/°C, cermet) and mechanical parameters (through-hole, PC pins, side adjustment) are equivalent. The 18-turn specification is acceptable where fine adjustment resolution is not critical.

Q: Are there dimensional compatibility concerns with the 89PR5KLF and 90PR5KLF?

A: Yes. The 89PR5KLF and 90PR5KLF feature 0.750" x 0.190" face dimensions, significantly larger than the 343P5K's 0.250" x 0.190" face. PCB layout modifications are required for these substitutes. The 3006P-1-502 and M43P502KB40 maintain compact dimensions compatible with the original 343P5K footprint.

Q: Which substitute offers the best compliance profile?

A: The M43P502KB40 (Vishay Spectrol) provides RoHS3 compliance, the most current RoHS standard. The 89PR5KLF and 90PR5KLF provide RoHS compliance with MSL 1 (Unlimited) moisture sensitivity. The 3006P-1-502 is RoHS non-compliant and suitable only for applications where RoHS compliance is not required.

Q: Can I use the 343P5K inventory for new production?

A: The 343P5K is classified as obsolete. While 755 pieces remain in stock, long-term production continuity cannot be assured. Active substitutes (3006P-1-502, 89PR5KLF, 90PR5KLF, M43P502KB40) are recommended for new designs to ensure supply chain stability and compliance with current regulatory standards.