B140WS-7-79 Equivalent & Substitute Parts

Part Overview

The B140WS-7-79 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 40 V DC reverse voltage and 1 A average rectified current in a surface mount SOD-323 package. This component is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this diode specification.

Substiute Parts

B140WS-7-79

Diodes IncorporatedIn Stock: 1021B140WS-7-79 Datasheet

Current PartRFQ

B140WS-7

Diodes IncorporatedIn Stock: 35329B140WS-7 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the B140WS-7-79 are identified based on electrical and mechanical parameter equivalence within the Schottky rectifier diode category. The substitution criteria are:

Electrical Parameters (Must Match):

• Voltage - DC Reverse (Vr) (Max): 40 V
• Current - Average Rectified (Io): 1 A
• Voltage - Forward (Vf) (Max) @ If: 620 mV @ 1 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 50 µA @ 40 V
• Capacitance @ Vr, F: 125 pF @ 0V, 1MHz
• Operating Temperature - Junction: -40°C ~ 125°C

Mechanical Parameters (Must Match):

• Package / Case: SC-76, SOD-323
• Mounting Type: Surface Mount
• Technology: Schottky

The B140WS-7 is identified as a parametric equivalent to the B140WS-7-79, sharing identical electrical specifications and mechanical packaging while differing in product status and packaging format availability.

Parameter Comparison

Engineering Selection Recommendations

The B140WS-7 is the direct substitute for the B140WS-7-79. Both parts are manufactured by Diodes Incorporated and maintain identical electrical and mechanical specifications across all critical parameters. The primary distinction is product status: the B140WS-7-79 is classified as obsolete, while the B140WS-7 maintains active product status with significantly higher inventory availability (35,300 units versus 1,004 units).

Both parts satisfy ROHS3 compliance requirements and carry identical export classification (EAR99) and tariff codes (8541.10.0080). Moisture sensitivity level is equivalent at MSL 1 (Unlimited), indicating no special moisture handling requirements during storage or assembly.

For new designs and ongoing production, the B140WS-7 is the appropriate selection due to active product status and sustained supply chain availability. For legacy system maintenance where the B140WS-7-79 is currently deployed, the B140WS-7 provides direct functional and mechanical compatibility without circuit redesign or PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can the B140WS-7 be used as a direct replacement for the B140WS-7-79 in existing designs?

A: Yes. The B140WS-7 is electrically and mechanically equivalent to the B140WS-7-79. All electrical parameters, including reverse voltage rating (40 V), forward current capacity (1 A), forward voltage drop (620 mV @ 1 A), and reverse leakage current (50 µA @ 40 V) are identical. The SOD-323 package footprint and surface mount configuration are unchanged, requiring no PCB layout modifications.

Q: What is the difference between the B140WS-7-79 and B140WS-7?

A: The parts are electrically and mechanically identical. The primary difference is product status: B140WS-7-79 is obsolete with limited inventory (1,004 units), while B140WS-7 is active with higher availability (35,300 units). Both are manufactured by Diodes Incorporated and comply with ROHS3 requirements.

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

A: No. Both the B140WS-7-79 and B140WS-7 carry identical compliance certifications: ROHS3 Compliant, MSL 1 (Unlimited), EAR99 export classification, and HTSUS code 8541.10.0080. No additional qualification or testing is required when transitioning between these parts.

Q: What packaging formats are available for the B140WS-7?

A: The B140WS-7 is available in Cut Tape (CT) and Digi-Reel® packaging formats. The B140WS-7-79 packaging format is not specified in available documentation.

Q: Can the B140WS-7 be used in high-temperature applications?

A: Both parts support identical operating temperature ranges: -40°C to 125°C junction temperature. Applications within this range are fully supported without derating or additional thermal management beyond the original design specifications.

Q: Is the B140WS-7 suitable for fast-switching applications?

A: Yes. The B140WS-7 is rated for fast recovery operation with switching speed ≤ 500 ns at currents greater than 200 mA, making it suitable for fast-switching rectification applications within the 1 A current rating.