BAS16 Equivalent & Substitute Parts

Part Overview

The BAS16 is a general-purpose small-signal diode manufactured by Panasonic Electronic Components, rated for 80 V DC reverse voltage and 200 mA average rectified current. The device is packaged in a surface-mount SC-59-3 (SOT-23-3) configuration and features a maximum forward voltage of 1.25 V at 150 mA with a reverse recovery time of 3 ns.

The BAS16 is classified as obsolete. Identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	80	V
Current - Average Rectified (Io)	200	mA
Voltage - Forward (Vf) (Max) @ If	1.25 @ 150	V @ mA
Reverse Recovery Time (trr)	3	ns
Current - Reverse Leakage @ Vr	100 @ 80	nA @ V
Capacitance @ Vr, F	1.2 @ 0, 1MHz	pF @ V, MHz
Operating Temperature - Junction (Max)	150	°C
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the BAS16 is determined by electrical and mechanical compatibility within the small-signal diode category. The primary substitution criteria are:

Electrical Parameters:

Maximum DC reverse voltage (Vr) must equal or exceed 80 V
Average rectified current (Io) must equal or exceed 200 mA
Forward voltage (Vf) characteristics must be compatible with circuit operation
Reverse recovery time (trr) and junction capacitance must not degrade circuit performance
Reverse leakage current must remain within acceptable limits

Mechanical Parameters:

Package type must be TO-236-3, SC-59, or SOT-23-3 (surface mount)
Pin configuration must be compatible with existing PCB layouts

Operational Parameters:

Maximum junction temperature must support the application environment
Moisture sensitivity level must be acceptable for manufacturing and storage

The BAS19,235 (Nexperia USA Inc.) meets these criteria as a direct substitute for the BAS16, with enhanced voltage rating and active product status.

Parameter Comparison

Parameter	BAS16 (Panasonic)	BAS19,235 (Nexperia)	Unit
Voltage - DC Reverse (Vr) (Max)	80	100	V
Current - Average Rectified (Io)	200	200	mA
Voltage - Forward (Vf) (Max) @ If	1.25 @ 150	1.25 @ 200	V @ mA
Reverse Recovery Time (trr)	3	50	ns
Current - Reverse Leakage @ Vr	100 @ 80	100 @ 100	nA @ V
Capacitance @ Vr, F	1.2 @ 0, 1MHz	5 @ 0, 1MHz	pF @ V, MHz
Operating Temperature - Junction (Max)	150	150	°C
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	—
Mounting Type	Surface Mount	Surface Mount	—
Product Status	Obsolete	Active	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	—

Engineering Selection Recommendations

BAS19,235 (Nexperia USA Inc.) as Primary Substitute:

The BAS19,235 is the recommended substitute for the obsolete BAS16. This part maintains electrical compatibility across all critical parameters: identical average rectified current (200 mA), matching forward voltage characteristics (1.25 V), and equivalent junction temperature rating (150°C). The BAS19,235 provides enhanced reverse voltage rating (100 V versus 80 V), offering improved margin for overvoltage conditions.

The BAS19,235 is classified as active product status, ensuring long-term availability and supply chain continuity. The part carries AEC-Q100 automotive qualification and is RoHS3 compliant, meeting modern regulatory requirements. Packaging is identical (TO-236-3/SOT-23-3 surface mount), enabling direct PCB layout compatibility without redesign.

The reverse recovery time of the BAS19,235 (50 ns) is longer than the BAS16 (3 ns). This parameter difference must be evaluated within the specific application context to confirm circuit performance remains acceptable.

The BAS19,235 is supplied in Tape & Reel (TR) packaging format, suitable for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the BAS19,235 be used as a direct replacement for the BAS16 in all applications?

A: The BAS19,235 meets the electrical and mechanical requirements for substitution. However, the reverse recovery time differs (50 ns versus 3 ns). Applications sensitive to switching speed or high-frequency performance must verify circuit operation with the longer recovery time specification.

Q: What is the significance of the higher reverse voltage rating on the BAS19,235?

A: The BAS19,235 is rated for 100 V DC reverse voltage compared to the BAS16 at 80 V. This higher rating provides additional safety margin against transient overvoltage events and supports operation in circuits with higher supply voltages. The part remains fully functional in circuits designed for 80 V operation.

Q: Are the package dimensions identical between BAS16 and BAS19,235?

A: Both parts use the TO-236-3 (SOT-23-3) surface-mount package. Pin configuration and PCB footprint are compatible, allowing direct substitution without layout modifications.

Q: What is the difference between SC-59-3 and TO-236AB packaging designations?

A: SC-59-3 and TO-236AB are equivalent package designations for the same physical form factor. Both refer to a three-pin surface-mount package with identical dimensions and pin spacing. The BAS16 and BAS19,235 are compatible within the same PCB footprint.

Q: Does the BAS19,235 meet RoHS compliance requirements?

A: Yes, the BAS19,235 is RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components.

Q: What is the moisture sensitivity level for both parts?

A: Both the BAS16 and BAS19,235 carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions for storage, handling, or manufacturing processes.

Q: Is the BAS19,235 suitable for automotive applications?

A: The BAS19,235 carries AEC-Q100 automotive qualification, confirming suitability for automotive-grade applications. The BAS16 does not carry this qualification.

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