BAS20LT1 Equivalent & Substitute Parts

Part Overview

The BAS20LT1 is a switching diode manufactured by onsemi, rated for 200 mA average rectified current and 200 V DC reverse voltage in a SOT-23 surface mount package. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design requirements and production continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer compatible performance within defined parameter tolerances suitable for the same application categories.

Substiute Parts

BAS20LT1

onsemiIn Stock: 6413BAS20LT1 Datasheet

Current PartRFQ

BAS20LT1G

onsemiIn Stock: 125231BAS20LT1G Datasheet

DirectRFQ

BAS20-E3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 1144BAS20-E3-08 Datasheet

SimilarRFQ

BAS21E6327HTSA1

Infineon TechnologiesIn Stock: 44151BAS21E6327HTSA1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAS20LT1 is determined by alignment of the following critical electrical and mechanical parameters:

Electrical Parameters:

• Voltage - DC Reverse (Vr) (Max): 200 V minimum required
• Current - Average Rectified (Io): 200 mA minimum required
• Voltage - Forward (Vf) (Max) @ If: 1.25 V @ 200 mA
• Reverse Recovery Time (trr): 50 ns
• Current - Reverse Leakage @ Vr: 100 nA @ 150 V or higher voltage rating
• Capacitance @ Vr, F: 5 pF @ 0V, 1MHz

Mechanical Parameters:

• Mounting Type: Surface Mount
• Package / Case: TO-236-3, SC-59, SOT-23-3
• Operating Temperature - Junction: -55°C to 150°C

Compliance Parameters:

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

Substitute parts are classified as direct equivalents when all electrical and mechanical parameters match or exceed the BAS20LT1 specifications. Similar substitutes maintain functional compatibility within the same application category while accommodating minor parameter variations.

Parameter Comparison

Engineering Selection Recommendations

BAS20LT1G (onsemi) - Direct Equivalent

The BAS20LT1G is the primary direct equivalent for the obsolete BAS20LT1. This part maintains identical electrical specifications: 200 V DC reverse voltage rating and 200 mA average rectified current. The BAS20LT1G is currently in active production status with substantial inventory availability (125,200 pcs). It carries ROHS3 compliance certification, meeting modern regulatory requirements. The part is supplied in Cut Tape and Digi-Reel packaging formats, supporting both manual and automated assembly processes. Operating temperature range of -55°C to 150°C matches standard industrial requirements. This part is the recommended first choice for direct replacement in new designs and production continuity.

BAS21E6327HTSA1 (Infineon Technologies) - Functional Equivalent with Enhanced Current Rating

The BAS21E6327HTSA1 provides functional equivalence with enhanced specifications. It maintains the 200 V DC reverse voltage rating and exceeds the current requirement with 250 mA average rectified current capability. Electrical characteristics including forward voltage, reverse recovery time, and capacitance align with the BAS20LT1 specifications. The part is classified as Last Time Buy status, indicating limited future availability. ROHS3 compliance and REACH Unaffected status confirm regulatory alignment. This part is suitable for applications requiring higher current margin or where the BAS20LT1G supply becomes constrained.

BAS20-E3-08 (Vishay General Semiconductor - Diodes Division) - Voltage-Derated Substitute

The BAS20-E3-08 offers functional substitution with a reduced voltage rating of 150 V DC reverse maximum, compared to the 200 V specification of the BAS20LT1. Current rating remains at 200 mA, matching the original part. Forward voltage, reverse recovery time, and capacitance parameters are identical. This part is currently in active production with moderate inventory (1,093 pcs). ROHS3 compliance and REACH Unaffected status are confirmed. Selection of this part requires verification that the application circuit operates within the 150 V maximum reverse voltage constraint. This part is suitable only for applications where the 200 V rating is not a critical design requirement.

Frequently Asked Questions (FAQ)

Q: Can BAS20LT1G be used as a direct replacement for BAS20LT1?

A: Yes. The BAS20LT1G maintains identical electrical specifications (200 V, 200 mA) and mechanical package (SOT-23-3). The primary difference is product status: BAS20LT1G is active production while BAS20LT1 is obsolete. BAS20LT1G is the recommended direct replacement.

Q: What is the key difference between BAS20-E3-08 and BAS20LT1?

A: The BAS20-E3-08 has a reduced maximum DC reverse voltage rating of 150 V compared to the 200 V rating of BAS20LT1. Current rating (200 mA) and all other electrical parameters remain equivalent. This part is suitable only for applications where 150 V reverse voltage rating is sufficient.

Q: Why is BAS21E6327HTSA1 classified as Last Time Buy?

A: Last Time Buy status indicates that the manufacturer has announced end-of-life for this part. Existing inventory will be sold until depletion, after which the part will no longer be available. This part should be selected only when BAS20LT1G supply is unavailable or when the enhanced 250 mA current rating is required.

Q: Are all substitute parts RoHS compliant?

A: The BAS20LT1 is RoHS non-compliant. All three substitute parts (BAS20LT1G, BAS20-E3-08, BAS21E6327HTSA1) are ROHS3 compliant. For new designs and regulatory compliance, ROHS3 compliant substitutes are required.

Q: Do all parts use the same SOT-23 package?

A: Yes. All parts use the SOT-23-3 package (also designated TO-236-3 or SC-59). Physical footprint and pin configuration are identical, supporting direct PCB layout compatibility.

Q: What is the moisture sensitivity level for these diodes?

A: All parts, including the original BAS20LT1 and all substitutes, have Moisture Sensitivity Level (MSL) of 1 (Unlimited). This indicates no moisture sensitivity precautions are required during storage, handling, or assembly.

Q: Can BAS20-E3-08 be used in all applications where BAS20LT1 is specified?

A: No. The BAS20-E3-08 has a 150 V maximum reverse voltage rating versus 200 V for BAS20LT1. It can only be used in applications where the circuit reverse voltage does not exceed 150 V. Circuit analysis is required to confirm voltage compatibility before substitution.

Q: What is the operating temperature range for these diodes?

A: BAS20LT1G and BAS20-E3-08 operate from -55°C to 150°C junction temperature. BAS21E6327HTSA1 specifies 150°C maximum junction temperature. All parts support standard industrial temperature ranges.