Equivalent & Substitute Parts for 3329H-1-104

Part Overview

The 3329H-1-104 is a 100 kOhm, 0.5W through-hole trimmer potentiometer manufactured by Bourns Inc. as part of the Trimpot® 3329 Sealed series. This component features cermet resistive material, top adjustment, and PC pin termination for applications requiring precision resistance tuning. The part is currently active in production with 725 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part number becomes unavailable or when alternative compliance certifications are required.

Substiute Parts

3329H-1-104

Bourns Inc.In Stock: 8343329H-1-104 Datasheet

Current PartRFQ

3329H-1-104LF

Bourns Inc.In Stock: 47433329H-1-104LF Datasheet

DirectRFQ

25PR100KLF

TT Electronics / BI TechnologiesIn Stock: 282525PR100KLF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3329H-1-104 is determined by strict equivalence across the following critical parameters: resistance value (100 kOhms), power rating (0.5W), tolerance (±10%), temperature coefficient (±100ppm/°C), number of turns (1), adjustment type (top adjustment), resistive material (cermet), mounting type (through hole), termination style (PC pins), and packaging format (tube).

Two substitute parts meet these criteria:

3329H-1-104LF (Bourns Inc.) — Direct equivalent with identical electrical and mechanical specifications. The primary distinction is RoHS3 compliance status versus the non-compliant original part.

25PR100KLF (TT Electronics / BI Technologies) — Functionally equivalent across all critical electrical parameters and mechanical mounting requirements. Physical form factor differs (square 0.270" x 0.270" versus round 0.250" diameter), and RoHS compliance status differs (RoHS Compliant versus non-compliant original).

Parameter Comparison

Engineering Selection Recommendations

3329H-1-104LF is the preferred direct substitute when RoHS3 compliance is required. This part maintains identical form factor, electrical performance, and mechanical compatibility with the original 3329H-1-104 while providing enhanced regulatory compliance. Higher inventory availability (4704 units) supports consistent procurement.

25PR100KLF serves as a functional alternative when form factor variation is acceptable within the application design. The square body geometry (0.270" x 0.270") differs from the round 0.250" diameter of the original part, requiring PCB layout verification. This part offers RoHS compliance and REACH unaffected status, providing regulatory advantages in certain supply chain contexts. Inventory availability is adequate at 2755 units.

Selection between substitutes depends on PCB layout constraints, regulatory requirements, and compliance certifications mandated by the end application or customer specifications.

Frequently Asked Questions (FAQ)

Q: Can 3329H-1-104LF be used as a direct replacement for 3329H-1-104?

A: Yes. Both parts are identical in electrical specifications (100 kOhms, 0.5W, ±10% tolerance, ±100ppm/°C), mechanical mounting (through hole, PC pins), and physical form factor (round 0.250" diameter). The primary difference is RoHS3 compliance status of the LF variant.

Q: What is the key difference between 3329H-1-104LF and 25PR100KLF?

A: Both parts meet all critical electrical and functional requirements. The 3329H-1-104LF maintains the original round body geometry (0.250" diameter), while the 25PR100KLF uses a square body (0.270" x 0.270"). Additionally, 25PR100KLF is manufactured by TT Electronics / BI Technologies rather than Bourns Inc., and carries different compliance certifications (RoHS Compliant, REACH Unaffected).

Q: Can 25PR100KLF be used if PCB layout space is limited?

A: The 25PR100KLF square body (0.270" x 0.270" face) is slightly larger than the original round body (0.250" diameter). PCB layout must be verified to confirm adequate clearance and mounting hole compatibility before substitution.

Q: Are there any compliance considerations when selecting a substitute?

A: Yes. The original 3329H-1-104 is RoHS non-compliant and REACH Affected. The 3329H-1-104LF provides ROHS3 compliance while remaining REACH Affected. The 25PR100KLF offers RoHS compliance and is REACH Unaffected. Selection should align with application and customer regulatory requirements.

Q: What inventory levels are available for each part?

A: 3329H-1-104 has 725 units in stock, 3329H-1-104LF has 4704 units, and 25PR100KLF has 2755 units. Higher availability of the LF variant supports procurement continuity.