SMS140 Equivalent & Substitute Parts

Part Overview

The SMS140 is a Schottky rectifier diode manufactured by Diotec Semiconductor, rated for 40 V DC reverse voltage and 1 A average rectified current. The device is packaged in a surface mount MELF DO-213AB configuration and features fast recovery characteristics suitable for high-frequency switching applications. The SMS140 maintains active product status with 1862 units in current inventory stock.

Equivalent substitute parts are necessary when the primary SMS140 becomes unavailable due to supply constraints, inventory depletion, or procurement lead time requirements. Substitute diodes must maintain electrical equivalence across voltage, current, and thermal specifications while conforming to the same mechanical package standard.

Substiute Parts

SMS140

Diotec SemiconductorIn Stock: 1932SMS140 Datasheet

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SGL41-40-E3/96

Vishay General Semiconductor - Diodes DivisionIn Stock: 7923SGL41-40-E3/96 Datasheet

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SGL41-40-E3/97

Vishay General Semiconductor - Diodes DivisionIn Stock: 6411SGL41-40-E3/97 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMS140 are qualified based on strict electrical and mechanical parameter equivalence. 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: 500 mV @ 1 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 500 µA @ 40 V
• Technology: Schottky

Mechanical Parameters (Must Match):

• Package / Case: DO-213AB, MELF
• Mounting Type: Surface Mount

The substitute parts SGL41-40-E3/96 and SGL41-40-E3/97, both manufactured by Vishay General Semiconductor - Diodes Division, satisfy all electrical and mechanical equivalence requirements. These parts are differentiated by packaging format: SGL41-40-E3/96 is supplied in Cut Tape (CT) & Digi-Reel® format, while SGL41-40-E3/97 is supplied in Tape & Reel (TR) format. The SMS140 is supplied in Tape & Reel (TR) format, making SGL41-40-E3/97 the direct packaging equivalent.

Parameter Comparison

Engineering Selection Recommendations

SGL41-40-E3/97 (Preferred Substitute)

The SGL41-40-E3/97 is the primary equivalent substitute for the SMS140. This part maintains complete electrical equivalence across all critical parameters and is supplied in Tape & Reel (TR) packaging, matching the SMS140 supply format. The SGL41-40-E3/97 carries ROHS3 compliance and REACH Unaffected status, providing regulatory alignment for applications subject to environmental standards. Current inventory availability is 6326 units.

SGL41-40-E3/96 (Secondary Substitute)

The SGL41-40-E3/96 provides electrical equivalence to the SMS140 but is supplied in Cut Tape (CT) & Digi-Reel® format rather than Tape & Reel (TR). This part is suitable for applications where packaging format flexibility is acceptable or where automated reel-based assembly is not required. The SGL41-40-E3/96 also carries ROHS3 compliance and REACH Unaffected status. Current inventory availability is 7833 units.

Both substitute parts operate within a narrower junction temperature range (-55°C ~ 125°C) compared to the SMS140 (-50°C ~ 150°C). Applications requiring operation at temperatures above 125°C or below -55°C must retain the SMS140 or conduct thermal analysis to confirm compatibility.

Frequently Asked Questions (FAQ)

Q: Can SGL41-40-E3/97 be used as a direct replacement for SMS140 in existing designs?

A: Yes. The SGL41-40-E3/97 meets all electrical specifications for the SMS140, including reverse voltage (40 V), average rectified current (1 A), forward voltage (500 mV @ 1 A), and fast recovery characteristics. Both parts use identical DO-213AB MELF surface mount packaging. The primary design consideration is the operating temperature range: the SGL41-40-E3/97 operates from -55°C to 125°C, while the SMS140 operates from -50°C to 150°C.

Q: What is the difference between SGL41-40-E3/96 and SGL41-40-E3/97?

A: The electrical specifications are identical between these two parts. The difference is packaging format: SGL41-40-E3/96 is supplied in Cut Tape (CT) & Digi-Reel® format, while SGL41-40-E3/97 is supplied in Tape & Reel (TR) format. The SMS140 uses Tape & Reel (TR) format, making SGL41-40-E3/97 the preferred substitute for automated assembly processes.

Q: Are there any compliance differences between SMS140 and the substitute parts?

A: Yes. The SMS140 has undefined RoHS and REACH status. Both SGL41-40-E3/96 and SGL41-40-E3/97 are ROHS3 compliant and REACH Unaffected. Applications subject to RoHS or REACH regulations should use the Vishay substitute parts.

Q: What is the capacitance specification for these diodes?

A: The SMS140 does not specify capacitance. The SGL41-40-E3/96 and SGL41-40-E3/97 specify 110 pF @ 4 V, 1 MHz. This parameter is not a substitution criterion for the SMS140.

Q: Can SMS140 be used in applications requiring operation above 125°C?

A: The SMS140 is rated for junction temperatures up to 150°C, while the Vishay substitutes (SGL41-40-E3/96 and SGL41-40-E3/97) are rated to 125°C. Applications requiring sustained operation between 125°C and 150°C must use the SMS140 or conduct thermal analysis to confirm the Vishay parts remain within acceptable operating limits.

Q: What is the reverse leakage current specification?

A: All three parts specify 500 µA @ 40 V reverse leakage current. This parameter is identical across SMS140, SGL41-40-E3/96, and SGL41-40-E3/97.