BAS16LT3 Equivalent & Substitute Parts

Part Overview

The BAS16LT3 is a small-signal switching diode manufactured by onsemi, rated for 75 V DC reverse voltage and 200 mA average rectified current in a surface-mount SOT-23-3 (TO-236) package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design and procurement requirements. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with modified parameters within acceptable application ranges.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	75	V
Current - Average Rectified (Io)	200	mA
Voltage - Forward (Vf) (Max) @ If	1.25 @ 150	V @ mA
Reverse Recovery Time (trr)	6	ns
Current - Reverse Leakage @ Vr	1 @ 75	µA @ V
Capacitance @ Vr, F	2 @ 0, 1MHz	pF @ V, MHz
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	—
Technology	Standard	—
Speed Classification	Small Signal ≤ 200mA (Io), Any Speed	—

Substitute Part Grouping Explanation

Substitution of the BAS16LT3 is determined by the following critical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) rating must equal or exceed the original specification (75 V minimum)
Current - Average Rectified (Io) must equal or exceed the original specification (200 mA minimum)
Voltage - Forward (Vf) characteristics must remain within acceptable operating margins
Reverse Recovery Time (trr) must maintain switching performance requirements
Reverse Leakage Current must remain within acceptable limits

Mechanical Compatibility Criteria:

Package / Case must be identical: TO-236-3, SC-59, or SOT-23-3
Mounting Type must be Surface Mount
Pin configuration must be compatible with existing PCB layouts

Regulatory & Compliance Criteria:

RoHS compliance status
REACH compliance status
Moisture Sensitivity Level (MSL)

The identified substitute parts are grouped as follows:

Direct Equivalent (Higher Voltage Rating): BAS16LT3G maintains identical current rating and forward voltage characteristics while providing enhanced voltage rating (100 V vs. 75 V), ensuring backward compatibility in applications with lower voltage requirements.

Similar Substitute (Reduced Current Rating): BAS16-E3-08 maintains identical voltage rating and forward voltage characteristics while providing reduced current rating (150 mA vs. 200 mA), suitable for applications with lower current demands.

Parameter Comparison

Parameter	BAS16LT3 (Main)	BAS16LT3G (Direct Equivalent)	BAS16-E3-08 (Similar Substitute)
Manufacturer	onsemi	onsemi	Vishay General Semiconductor - Diodes Division
Product Status	Obsolete	Active	Active
Voltage - DC Reverse (Vr) (Max)	75 V	100 V	75 V
Current - Average Rectified (Io)	200 mA	200 mA	150 mA
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 150 mA	1.25 V @ 150 mA	1.25 V @ 150 mA
Reverse Recovery Time (trr)	6 ns	6 ns	6 ns
Current - Reverse Leakage @ Vr	1 µA @ 75 V	1 µA @ 100 V	1 µA @ 75 V
Capacitance @ Vr, F	2 pF @ 0V, 1MHz	2 pF @ 0V, 1MHz	4 pF @ 0V, 1MHz
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

BAS16LT3G Selection Criteria:

The BAS16LT3G is the primary substitute for the obsolete BAS16LT3. This part is manufactured by onsemi (original manufacturer) and maintains active product status. The BAS16LT3G provides a 100 V reverse voltage rating compared to the original 75 V specification, delivering enhanced voltage margin for circuit protection. Current rating remains at 200 mA, matching the original specification. Forward voltage characteristics are identical at 1.25 V @ 150 mA. The BAS16LT3G achieves ROHS3 compliance, addressing regulatory requirements absent in the original part. All mechanical parameters, including SOT-23-3 package and surface-mount configuration, remain identical. This part is suitable for direct replacement in applications where the original BAS16LT3 was specified.

BAS16-E3-08 Selection Criteria:

The BAS16-E3-08 is a secondary substitute manufactured by Vishay General Semiconductor - Diodes Division and maintains active product status. This part maintains the original 75 V reverse voltage rating and identical forward voltage characteristics. The current rating is reduced to 150 mA compared to the original 200 mA specification. This part is suitable for applications where the circuit current demand does not exceed 150 mA. The BAS16-E3-08 achieves ROHS3 compliance. Capacitance is increased to 4 pF @ 0V, 1MHz compared to 2 pF in the original part. All mechanical parameters remain compatible with the original SOT-23-3 package and surface-mount configuration. This part is suitable for replacement in current-limited applications.

Compliance Advantage:

Both substitute parts achieve ROHS3 compliance, whereas the original BAS16LT3 is RoHS non-compliant. This compliance improvement supports modern manufacturing and environmental regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can BAS16LT3G be used as a direct replacement for BAS16LT3?

A: Yes. The BAS16LT3G maintains identical current rating (200 mA), forward voltage (1.25 V @ 150 mA), reverse recovery time (6 ns), and package configuration (SOT-23-3). The increased voltage rating (100 V vs. 75 V) provides additional circuit margin and does not prevent substitution in applications designed for 75 V operation.

Q: What are the limitations of using BAS16-E3-08 as a substitute?

A: The BAS16-E3-08 has a reduced current rating of 150 mA compared to the original 200 mA specification. This part is suitable only for applications where the circuit current demand does not exceed 150 mA. The capacitance is also increased to 4 pF, which may affect high-frequency circuit performance compared to the original 2 pF specification.

Q: Are both substitute parts available in the same packaging?

A: Yes. Both BAS16LT3G and BAS16-E3-08 are supplied in SOT-23-3 (TO-236) surface-mount packages, identical to the original BAS16LT3. Both parts are compatible with existing PCB layouts and assembly processes.

Q: What is the difference between "Direct Equivalent" and "Similar Substitute"?

A: The BAS16LT3G is classified as a direct equivalent because it maintains all critical electrical parameters (current, forward voltage, switching speed) while providing enhanced voltage rating. The BAS16-E3-08 is classified as a similar substitute because it reduces the current rating to 150 mA, requiring application-specific evaluation before substitution.

Q: Do the substitute parts meet modern compliance requirements?

A: Yes. Both BAS16LT3G and BAS16-E3-08 achieve ROHS3 compliance, whereas the original BAS16LT3 is RoHS non-compliant. Both parts maintain REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity rating, identical to the original part.

Q: Which substitute should be selected for new designs?

A: For new designs requiring 200 mA operation, BAS16LT3G is the recommended selection due to maintained current rating and active product status from the original manufacturer. For designs with current requirements not exceeding 150 mA, BAS16-E3-08 provides an alternative from an established semiconductor manufacturer.

Q: Are there any thermal or operating temperature differences between the parts?

A: Operating temperature specifications are not provided in the original BAS16LT3 datasheet parameters. Both substitute parts specify operating temperature range of -55°C to 150°C at the junction. Thermal performance should be evaluated based on specific application requirements and circuit design.

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