VS-18TQ035PBF Equivalent & Substitute Parts

Part Overview

The VS-18TQ035PBF is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, designed for high-current applications requiring fast recovery characteristics. This through-hole component is rated for 35 V DC reverse voltage with an average rectified current of 18 A and operates across a junction temperature range of -55°C to 175°C.

The VS-18TQ035PBF has been discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production, repair, and maintenance applications. The substitute part VS-18TQ035-M3 provides functional equivalence while maintaining active product status.

Substiute Parts

VS-18TQ035PBF

Vishay General Semiconductor - Diodes DivisionIn Stock: 1087VS-18TQ035PBF Datasheet

Current PartRFQ

VS-18TQ035-M3

Vishay General Semiconductor - Diodes DivisionIn Stock: 1166VS-18TQ035-M3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the VS-18TQ035PBF is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Voltage - DC Reverse (Vr) (Max): 35 V
• Current - Average Rectified (Io): 18 A
• Technology: Schottky
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 2.5 mA @ 35 V

Mechanical Parameters:

• Mounting Type: Through Hole
• Package / Case: TO-220-2
• Supplier Device Package: TO-220AC

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

The substitute part VS-18TQ035-M3 meets all critical electrical and mechanical requirements for direct substitution. Variations in forward voltage (Vf) and capacitance specifications do not preclude substitution when the primary electrical ratings and package form factor remain identical.

Parameter Comparison

Engineering Selection Recommendations

VS-18TQ035-M3 is the direct substitute for VS-18TQ035PBF based on the following factors:

Product Status: VS-18TQ035-M3 maintains active product status with confirmed inventory availability (1061 Pcs New Original In Stock), whereas VS-18TQ035PBF is discontinued. Selection of the active substitute ensures long-term supply chain continuity.

Electrical Equivalence: Both parts share identical voltage ratings (35 V DC reverse), current ratings (18 A average rectified), reverse leakage characteristics (2.5 mA @ 35 V), and fast recovery speed specifications (≤ 500ns, > 200mA). These parameters define the functional performance envelope for Schottky rectifier applications.

Mechanical Compatibility: Both parts utilize identical TO-220-2 package configuration with TO-220AC supplier device package designation, ensuring direct PCB footprint compatibility and thermal management characteristics.

Compliance Alignment: Both parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status, satisfying regulatory and environmental requirements for equivalent applications.

Packaging Consideration: VS-18TQ035-M3 is supplied in Tube packaging, whereas VS-18TQ035PBF packaging is not specified. Tube packaging is standard for through-hole components and does not affect component performance or PCB assembly compatibility.

Frequently Asked Questions (FAQ)

Q: Can VS-18TQ035-M3 be used as a direct replacement for VS-18TQ035PBF in existing designs?

A: Yes. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical ratings (35 V, 18 A), package configuration (TO-220-2), and operating temperature range (-55°C to 175°C). The parts are electrically and mechanically interchangeable.

Q: What is the significance of the forward voltage difference between the two parts?

A: VS-18TQ035PBF specifies 600 mV @ 18 A, while VS-18TQ035-M3 specifies 720 mV @ 36 A. These measurements are taken at different current levels and represent normal manufacturing variation within the Schottky diode technology. Both values fall within acceptable operating parameters for the 35 V, 18 A rating class.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts maintain identical RoHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status. No additional compliance verification is required when substituting VS-18TQ035-M3 for VS-18TQ035PBF.

Q: Why is VS-18TQ035PBF discontinued while VS-18TQ035-M3 remains active?

A: Product discontinuation decisions are made by manufacturers and distributors based on market demand and inventory management. VS-18TQ035-M3 represents the current active product offering from Vishay for this electrical specification class. Substitution to the active part ensures continued availability for future production runs.

Q: Does the TO-220AC package designation affect substitution eligibility?

A: No. Both parts use the TO-220AC supplier device package designation, which refers to the same physical form factor and thermal interface. This ensures identical mounting, thermal dissipation, and PCB assembly compatibility.

Q: What is the base product number significance?

A: Both parts share the base product number 18TQ035, indicating they are variants of the same core product design from Vishay. This designation confirms that the parts are engineered for the same application class and electrical performance envelope.