BAS21/8VL Equivalent & Substitute Parts

Part Overview

The BAS21/8VL is a general-purpose rectifier diode manufactured by Nexperia USA Inc., rated for 250 V DC reverse voltage and 200 mA average rectified current in a surface mount TO-236AB package. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design requirements and procurement continuity. Substitute parts must maintain electrical and mechanical compatibility while offering active product status and sustained supply availability.

Substiute Parts

BAS21/8VL

Nexperia USA Inc.In Stock: 752BAS21/8VL Datasheet

Current PartRFQ

BAS21LT1G

onsemiIn Stock: 394139BAS21LT1G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAS21/8VL is determined by equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 250 V
• Current - Average Rectified (Io): 200 mA
• Voltage - Forward (Vf) (Max) @ If: 1.25 V @ 200 mA
• Reverse Recovery Time (trr): 50 ns
• Current - Reverse Leakage @ Vr: 100 nA @ 200 V
• Capacitance @ Vr, F: 5 pF @ 0V, 1MHz

Mechanical Equivalence Criteria:

• Package / Case: TO-236-3, SC-59, SOT-23-3
• Mounting Type: Surface Mount

Compliance Equivalence Criteria:

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

The BAS21LT1G from onsemi meets all specified electrical and mechanical parameters and maintains equivalent compliance certifications, establishing it as a direct substitute for the obsolete BAS21/8VL.

Parameter Comparison

Engineering Selection Recommendations

The BAS21LT1G from onsemi is the direct equivalent substitute for the obsolete BAS21/8VL. All electrical parameters, mechanical specifications, and compliance certifications are identical. The BAS21LT1G maintains active product status with substantial inventory availability (394,078 pieces), ensuring procurement continuity and long-term supply security.

Both parts share the same base product number (BAS21) and are classified as standard technology small-signal rectifier diodes. The BAS21LT1G is supplied in SOT-23-3 (TO-236) packaging with Cut Tape and Digi-Reel options, providing flexible procurement formats.

Compliance certifications are equivalent: both parts are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (unlimited moisture sensitivity level). The operating temperature range of the BAS21LT1G extends to −55°C, providing broader thermal operating capability compared to the BAS21/8VL specification.

Frequently Asked Questions (FAQ)

Q: Can the BAS21LT1G be used as a direct replacement for the BAS21/8VL in existing designs?

A: Yes. The BAS21LT1G meets all electrical and mechanical specifications of the BAS21/8VL. Both components are rated for 250 V reverse voltage, 200 mA average rectified current, and are packaged in identical TO-236-3 (SOT-23-3) surface mount configurations. No circuit modifications are required.

Q: Are there differences in the operating temperature ranges?

A: The BAS21LT1G specifies an operating temperature range of −55°C to 150°C, while the BAS21/8VL specifies a maximum junction temperature of 150°C. The BAS21LT1G provides extended low-temperature capability. Both parts operate within the same maximum temperature limit.

Q: What is the significance of the product status difference?

A: The BAS21/8VL is classified as obsolete, indicating discontinued manufacturing and limited availability. The BAS21LT1G is active, with ongoing production and substantial inventory. Substitution ensures access to current supply and long-term component availability.

Q: Are the packaging and mounting specifications identical?

A: Yes. Both parts use the TO-236-3 (SC-59, SOT-23-3) surface mount package. The BAS21LT1G is supplied in Cut Tape and Digi-Reel formats, supporting standard automated assembly processes. No PCB layout modifications are necessary.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the BAS21/8VL and BAS21LT1G are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (unlimited). Compliance certifications are equivalent, supporting use in regulated applications.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is determined by matching reverse voltage (250 V), average rectified current (200 mA), forward voltage drop (1.25 V @ 200 mA), reverse recovery time (50 ns), reverse leakage current (100 nA @ 200 V), and junction capacitance (5 pF @ 0V, 1MHz). The BAS21LT1G matches all these parameters.