BAS56 TR Equivalent & Substitute Parts

Part Overview

The BAS56 TR is a dual independent diode array designed for general-purpose rectification applications. Manufactured by Central Semiconductor Corp, this component features a 60 V reverse voltage rating and 200 mA average rectified current per diode in a surface mount TO-253-4 (SOT-143) package. The BAS56 TR is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Diode Configuration	2 Independent
Voltage - DC Reverse (Vr) (Max)	60 V
Current - Average Rectified (Io) per Diode	200 mA (DC)
Voltage - Forward (Vf) (Max) @ If	1 V @ 200 mA
Reverse Recovery Time (trr)	6 ns
Current - Reverse Leakage @ Vr	100 nA @ 60 V
Operating Temperature - Junction	-65°C ~ 150°C
Package / Case	TO-253-4, TO-253AA
Supplier Device Package	SOT-143
Mounting Type	Surface Mount
Technology	Standard

Substitute Part Grouping Explanation

Substitution of the BAS56 TR is determined by strict electrical and mechanical parameter matching. The following criteria establish equivalence:

Critical Matching Parameters:

Diode configuration: 2 Independent diodes
Maximum reverse voltage: 60 V minimum
Average rectified current: 200 mA per diode minimum
Forward voltage: 1 V maximum @ 200 mA
Reverse recovery time: 6 ns
Package type: TO-253-4 / TO-253AA (SOT-143 family)
Surface mount technology
Reverse leakage current: 100 nA @ specified voltage

The substitute parts BAS56,215 and BAS56,235, both manufactured by Nexperia USA Inc., meet all electrical parameters of the original BAS56 TR. Both substitutes maintain identical diode configuration, voltage ratings, current ratings, and forward voltage characteristics. The substitutes are available in active product status with automotive-grade qualification (AEC-Q100) and RoHS3 compliance, providing enhanced supply chain reliability compared to the obsolete original part.

Parameter Comparison

Parameter	BAS56 TR (Original)	BAS56,215 (Substitute)	BAS56,235 (Substitute)
Manufacturer	Central Semiconductor Corp	Nexperia USA Inc.	Nexperia USA Inc.
Product Status	Obsolete	Active	Active
Diode Configuration	2 Independent	2 Independent	2 Independent
Voltage - DC Reverse (Vr) (Max)	60 V	60 V	60 V
Current - Average Rectified (Io) per Diode	200 mA (DC)	200 mA (DC)	200 mA (DC)
Voltage - Forward (Vf) (Max) @ If	1 V @ 200 mA	1 V @ 200 mA	1 V @ 200 mA
Reverse Recovery Time (trr)	6 ns	6 ns	6 ns
Current - Reverse Leakage @ Vr	100 nA @ 60 V	100 nA @ 120 V	100 nA @ 120 V
Operating Temperature - Junction (Max)	150°C	150°C	150°C
Package / Case	TO-253-4, TO-253AA	TO-253-4, TO-253AA	TO-253-4, TO-253AA
Supplier Device Package	SOT-143	SOT-143B	SOT-143B
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Technology	Standard	Standard	Standard
Grade	Standard	Automotive	Automotive
Qualification	Not specified	AEC-Q100	AEC-Q100
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

For Direct Replacement:

BAS56,215 and BAS56,235 are functionally equivalent to the BAS56 TR across all critical electrical parameters. Both substitute parts are manufactured by Nexperia USA Inc. and carry active product status, ensuring long-term availability and supply chain stability. The substitutes feature automotive-grade qualification (AEC-Q100) and RoHS3 compliance, providing enhanced reliability margins beyond the original obsolete part.

Selection Criteria:

Inventory Availability: BAS56,215 offers 3140 units in stock; BAS56,235 offers 1129 units in stock. Both exceed typical procurement requirements.
Compliance Requirements: If automotive or RoHS3 compliance is mandated, both substitutes satisfy these requirements. The original BAS56 TR does not specify these certifications.
Package Compatibility: All three parts use TO-253-4 / TO-253AA packages with surface mount technology. PCB footprints are compatible.
Electrical Performance: Reverse leakage current in substitutes is specified at 120 V versus 60 V for the original, indicating superior leakage characteristics at higher voltages.

Either BAS56,215 or BAS56,235 is suitable for direct replacement in applications currently using BAS56 TR. Selection between the two substitutes may be based on inventory availability and procurement lead times.

Frequently Asked Questions (FAQ)

Q: Can BAS56,215 and BAS56,235 be used interchangeably with BAS56 TR?

A: Yes. Both substitutes meet all electrical parameters of the original part: 60 V reverse voltage, 200 mA average rectified current per diode, 1 V forward voltage at 200 mA, and 6 ns reverse recovery time. Package compatibility (TO-253-4 / TO-253AA) and surface mount technology are identical.

Q: What is the difference between BAS56,215 and BAS56,235?

A: Both parts are electrically and mechanically identical. They differ only in manufacturer part number designation and current inventory levels. BAS56,215 has 3140 units available; BAS56,235 has 1129 units available. Selection may be based on procurement availability.

Q: Why are the substitute parts rated for reverse leakage at 120 V instead of 60 V?

A: The substitutes specify reverse leakage current at 120 V, which is a more stringent test condition than the original part's 60 V specification. This indicates superior leakage performance and provides additional design margin.

Q: Are the substitute parts suitable for automotive applications?

A: Yes. Both BAS56,215 and BAS56,235 carry AEC-Q100 automotive qualification, making them suitable for automotive-grade applications. The original BAS56 TR does not specify automotive qualification.

Q: What is the difference between SOT-143 and SOT-143B packages?

A: Both are surface mount packages in the TO-253 family with identical external dimensions and pin configurations. SOT-143B is a variant designation used by Nexperia. PCB footprints are compatible.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both BAS56,215 and BAS56,235 are ROHS3 compliant. The original BAS56 TR does not specify RoHS status.

Q: What is the moisture sensitivity level (MSL) for these parts?

A: All three parts (original and substitutes) have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

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