ST4TB202 Equivalent & Substitute Parts

Part Overview

The ST4TB202 is a 2 kOhms, 0.25W surface mount trimmer potentiometer manufactured by Vishay Beyschlag/Draloric/BC Components. This component features a gull wing termination style, cermet resistive material, and top adjustment capability with a 1.0 turn configuration. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

ST4TB202

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 1118ST4TB202 Datasheet

Current PartRFQ

ST-4ETB202

Nidec Components CorporationIn Stock: 28386ST-4ETB202 Datasheet

MFR RecommendedRFQ

ST-4ETH202

Nidec Components CorporationIn Stock: 842ST-4ETH202 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete ST4TB202 is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 2 kOhms
• Power rating: 0.25W (1/4W)
• Tolerance: ±20%
• Temperature coefficient: ±100ppm/°C
• Number of turns: 1.0

Mechanical Parameters:

• Mounting type: Surface Mount
• Termination style: Gull Wing
• Resistive material: Cermet
• Physical dimensions: Rectangular - 0.197" x 0.177" Face (5.00mm x 4.50mm)
• Moisture sensitivity level: 1 (Unlimited)

Functional Parameters:

• Adjustment type: Top Adjustment (primary substitute) or Side Adjustment (alternative)
• Series compatibility: ST4

The ST-4ETB202 provides direct functional equivalence with identical adjustment type (top adjustment). The ST-4ETH202 maintains all electrical and mechanical parameters but features side adjustment instead of top adjustment, requiring evaluation of circuit board layout and accessibility requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: ST-4ETB202

The ST-4ETB202 is the recommended substitute for the obsolete ST4TB202. This part maintains identical electrical specifications, mechanical dimensions, and adjustment type (top adjustment). The ST-4ETB202 is manufactured by Nidec Components Corporation and carries active product status with ROHS3 compliance, addressing regulatory requirements that the original part does not meet. Inventory availability is substantial at 28,278 pieces.

Alternative Substitute: ST-4ETH202

The ST-4ETH202 provides electrical and mechanical equivalence but features side adjustment instead of top adjustment. This part is also manufactured by Nidec Components Corporation with active status and ROHS3 compliance. Selection of this alternative requires confirmation that circuit board layout and potentiometer access accommodate side adjustment orientation. Inventory availability is 754 pieces.

Both substitute parts maintain the ST4 series designation and are compatible with the same package format (Tape & Reel). The transition from Vishay Beyschlag/Draloric/BC Components to Nidec Components Corporation represents a standard industry substitution within the ST4 trimmer potentiometer family.

Frequently Asked Questions (FAQ)

Q: Can ST-4ETB202 be used as a direct replacement for ST4TB202?

A: Yes. The ST-4ETB202 maintains identical electrical parameters (2 kOhms, 0.25W, ±20% tolerance, ±100ppm/°C), mechanical dimensions (5.00mm x 4.50mm), termination style (gull wing), and adjustment type (top adjustment). Both parts are surface mount cermet trimmer potentiometers with 1.0 turn configuration.

Q: What is the difference between ST-4ETB202 and ST-4ETH202?

A: Both parts are electrically and mechanically identical with one exception: adjustment type. The ST-4ETB202 features top adjustment, while the ST-4ETH202 features side adjustment. This difference affects the physical orientation of the adjustment mechanism on the circuit board and the accessibility of the potentiometer for tuning operations.

Q: Are there packaging differences between the main part and substitutes?

A: No. All three parts are supplied in Tape & Reel (TR) packaging format. Physical dimensions and moisture sensitivity levels are identical across all parts.

Q: Does the change from Vishay Beyschlag/Draloric/BC Components to Nidec Components Corporation affect compatibility?

A: No. Both manufacturers produce components within the ST4 series that meet identical electrical and mechanical specifications. The substitution represents a standard cross-manufacturer equivalent within the trimmer potentiometer category.

Q: What is the significance of RoHS3 compliance on the substitute parts?

A: The ST-4ETB202 and ST-4ETH202 are ROHS3 compliant, while the original ST4TB202 is RoHS non-compliant. For applications subject to RoHS regulations or customer requirements, the substitute parts satisfy current regulatory compliance standards.

Q: Can either substitute part be used interchangeably in the same circuit?

A: The ST-4ETB202 provides direct interchangeability with identical adjustment type. The ST-4ETH202 requires circuit board layout evaluation due to its side adjustment configuration. Both parts satisfy identical electrical performance requirements.