ST5TW102 Equivalent & Substitute Parts

Part Overview

The ST5TW102 is a 1 kOhms 0.25W surface mount trimmer potentiometer with Cermet resistive material, 14-turn top adjustment, and Gull Wing termination. Manufactured by Vishay Beyschlag/Draloric/BC Components, this part is classified as obsolete. Due to its obsolete status and limited availability from the original manufacturer, identifying equivalent and substitute parts is necessary for ongoing production support and design continuity.

Key Parameters

Parameter	Value
Resistance	1 kOhms
Power Rating	0.25W (1/4W)
Tolerance	±10%
Temperature Coefficient	±100ppm/°C
Number of Turns	14
Adjustment Type	Top Adjustment
Resistive Material	Cermet
Mounting Type	Surface Mount
Termination Style	Gull Wing
Size/Dimension	Rectangular - 0.236" x 0.169" Face (6.00mm x 4.30mm)
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the ST5TW102 are identified based on electrical and mechanical parameter compatibility. The primary substitution criteria are:

Resistance value: 1 kOhms
Power rating: 0.25W (1/4W)
Tolerance: ±10%
Temperature coefficient: ±100ppm/°C
Adjustment type: Top Adjustment
Resistive material: Cermet
Mounting type: Surface Mount
Termination style: Gull Wing

Substitutes are grouped into two categories: direct equivalents (identical electrical and mechanical specifications) and manufacturer-recommended alternatives (minor dimensional or turn-count variations within acceptable engineering tolerances).

Parameter Comparison

Parameter	ST5TW102 (Main)	ST-5EW102	3269W-1-102G	ST-5ETW102
Manufacturer	Vishay Beyschlag/Draloric/BC Components	Nidec Components Corporation	Bourns Inc.	Nidec Components Corporation
Resistance	1 kOhms	1 kOhms	1 kOhms	1 kOhms
Power Rating	0.25W	0.25W	0.25W	0.25W
Tolerance	±10%	±10%	±10%	±10%
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C
Number of Turns	14	14	12	14
Adjustment Type	Top Adjustment	Top Adjustment	Top Adjustment	Top Adjustment
Resistive Material	Cermet	Cermet	Cermet	Cermet
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Termination Style	Gull Wing	Gull Wing	Gull Wing	Gull Wing
Size/Dimension	0.236" x 0.169" (6.00mm x 4.30mm)	0.236" x 0.169" (6.00mm x 4.30mm)	0.250" x 0.170" (6.35mm x 4.32mm)	0.236" x 0.169" (6.00mm x 4.30mm)
Product Status	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	Not specified	Non-compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	1 (Unlimited)
Inventory Status	746 Pcs	1037 Pcs	2400 Pcs	13881 Pcs

Engineering Selection Recommendations

ST-5EW102 (Nidec Components Corporation): This part is a direct electrical and mechanical equivalent to the ST5TW102. It maintains identical specifications across all critical parameters including resistance, power rating, tolerance, temperature coefficient, number of turns, and physical dimensions. Product status is active with higher inventory availability (1037 Pcs). This is the preferred direct replacement.

ST-5ETW102 (Nidec Components Corporation): This part is functionally equivalent to the ST5TW102 with identical electrical specifications and physical dimensions. It is packaged in Tape & Reel format and carries ROHS3 compliance, making it suitable for applications requiring RoHS compliance. Inventory availability is significantly higher (13881 Pcs), supporting long-term production requirements.

3269W-1-102G (Bourns Inc.): This part meets all core electrical specifications but differs in two parameters: number of turns (12 versus 14) and physical dimensions (0.250" x 0.170" versus 0.236" x 0.169"). The Moisture Sensitivity Level is MSL 2 (1 Year) compared to MSL 1 (Unlimited) for the main part. These differences require design verification for PCB layout compatibility and adjustment resolution requirements. This part is suitable only when dimensional and turn-count variations are acceptable.

Frequently Asked Questions (FAQ)

Q: Can ST-5EW102 be used as a direct replacement for ST5TW102?

A: Yes. ST-5EW102 is electrically and mechanically identical to ST5TW102 across all specified parameters. It is manufactured by Nidec Components Corporation and carries active product status.

Q: What is the difference between ST-5EW102 and ST-5ETW102?

A: Both parts are electrically and mechanically identical. The primary differences are packaging format (Bulk versus Tape & Reel) and RoHS compliance status (ST-5ETW102 is ROHS3 compliant). ST-5ETW102 offers significantly higher inventory availability.

Q: Can 3269W-1-102G replace ST5TW102 in all applications?

A: 3269W-1-102G differs in two parameters: it has 12 turns instead of 14, and physical dimensions are 0.250" x 0.170" instead of 0.236" x 0.169". These differences may affect PCB layout fit and adjustment resolution. Compatibility depends on specific application requirements and PCB design constraints.

Q: Why is the ST5TW102 marked as obsolete?

A: The ST5TW102 is classified as obsolete by the original manufacturer. Active alternatives from current manufacturers are available to support ongoing production and design requirements.

Q: What does Moisture Sensitivity Level (MSL) mean for these parts?

A: MSL indicates the maximum time a component can be exposed to moisture before soldering. ST5TW102, ST-5EW102, and ST-5ETW102 have MSL 1 (Unlimited exposure). 3269W-1-102G has MSL 2 (1 Year maximum exposure), requiring stricter moisture control during storage and handling.

Q: Are there RoHS compliance considerations for these substitutes?

A: ST5TW102 and 3269W-1-102G are RoHS non-compliant. ST-5ETW102 is ROHS3 compliant. For applications requiring RoHS compliance, ST-5ETW102 is the appropriate selection.

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