BAS16HT1 Equivalent & Substitute Parts

Part Overview

The BAS16HT1 is a general-purpose switching diode rated for 75 V DC reverse voltage and 200 mA average rectified current in a surface mount SOD-323 package. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design and procurement requirements. The BAS16HT1 belongs to the BAS16 base product family and is suitable for small-signal switching applications with recovery times of 6 nanoseconds.

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 V @ 150 mA	V
Reverse Recovery Time (trr)	6	ns
Current - Reverse Leakage @ Vr	1 µA @ 75 V	µA
Capacitance @ Vr, F	2 pF @ 0V, 1MHz	pF
Package / Case	SC-76, SOD-323	—
Mounting Type	Surface Mount	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the BAS16HT1 is determined by the following critical parameters:

Voltage Rating (Vr): The reverse voltage must equal or exceed 75 V. Parts with higher voltage ratings (100 V) are acceptable as they provide additional design margin. Parts with lower voltage ratings are not suitable.

Current Rating (Io): The average rectified current must equal or exceed 200 mA. Parts rated for 150 mA or 100 mA do not meet the current requirement and are classified as similar parts with reduced capability. Parts rated for 250 mA or higher are acceptable.

Package Compatibility: The BAS16HT1 uses SOD-323 (SC-76) packaging. Substitutes using SOT-323 (SC-70) packaging represent a different physical footprint and require PCB layout modification.

Reverse Recovery Time (trr): The 6 ns specification is met by all listed alternatives.

Forward Voltage (Vf): The 1.25 V specification at 150 mA is met by direct equivalents. Variations in forward voltage at different test currents do not disqualify substitutes.

Product Status: Active parts are preferred over obsolete parts for long-term availability and supply chain stability.

Compliance: RoHS3 compliance is required for new designs; non-compliant parts are restricted in certain applications.

Parameter Comparison

Parameter	BAS16HT1	BAS16HT1G	BAS16WS-E3-08	BAS16W-AU_R1_000A1	BAS16WT-TP	CDSF355B
Manufacturer	onsemi	onsemi	Vishay	Panjit	Micro Commercial Co	Comchip
Voltage - DC Reverse (Vr) (Max)	75 V	100 V	75 V	75 V	75 V	80 V
Current - Average Rectified (Io)	200 mA	200 mA	250 mA	150 mA	150 mA	100 mA
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 150 mA	1.25 V @ 150 mA	1.25 V @ 150 mA	855 mV @ 10 mA	1.25 V @ 150 mA	1 V @ 100 mA
Reverse Recovery Time (trr)	6 ns	6 ns	6 ns	6 ns	4 ns	4 ns
Current - Reverse Leakage @ Vr	1 µA @ 75 V	1 µA @ 100 V	1 µA @ 75 V	1 µA @ 75 V	1 µA @ 75 V	100 nA @ 80 V
Capacitance @ Vr, F	2 pF @ 0V, 1MHz	2 pF @ 0V, 1MHz	2 pF @ 0V, 1MHz	2 pF @ 0V, 1MHz	2 pF @ 0V, 1MHz	3 pF @ 0.5V, 1MHz
Package / Case	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323	SC-70, SOT-323	SC-70, SOT-323	1005 (2512 Metric)
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

BAS16HT1G is the recommended primary substitute. It is manufactured by onsemi, the same manufacturer as the original BAS16HT1, and maintains identical electrical specifications including 75 V reverse voltage, 200 mA current rating, and 1.25 V forward voltage. The BAS16HT1G is active in production with substantial inventory availability (2,831,300 units), is RoHS3 compliant, and uses the same SOD-323 package. No PCB layout modification is required.

Higher Voltage Alternative:

BAS16HT1G also provides a 100 V reverse voltage rating, which exceeds the 75 V requirement and offers additional design margin for applications with voltage transients or overvoltage conditions.

Higher Current Alternative:

BAS16WS-E3-08 (Vishay) is rated for 250 mA, exceeding the 200 mA requirement. It maintains 75 V reverse voltage, 1.25 V forward voltage, and uses the same SOD-323 package. This part is active and RoHS3 compliant. The higher current rating provides margin for applications approaching the original specification limit.

Reduced Current Alternatives:

BAS16W-AU_R1_000A1 (Panjit) and BAS16WT-TP (Micro Commercial Co) are rated for 150 mA, which is below the 200 mA requirement. These parts are suitable only for applications where the actual circuit current does not exceed 150 mA. Both use SOT-323 packaging, requiring PCB layout modification. Both are active and RoHS3 compliant. BAS16W-AU_R1_000A1 includes AEC-Q101 automotive qualification.

Lower Current Alternative:

CDSF355B (Comchip) is rated for 100 mA, which is below the 200 mA requirement. This part uses a different package format (1005/SOD-323F) and is suitable only for applications with significantly reduced current demands. It is active and RoHS3 compliant.

Compliance Consideration:

All substitute parts listed are RoHS3 compliant, whereas the original BAS16HT1 is non-compliant. This compliance improvement is a significant advantage for new designs and applications subject to RoHS regulations.

Frequently Asked Questions (FAQ)

Q: Can BAS16HT1G be used as a direct replacement for BAS16HT1?

A: Yes. BAS16HT1G is a direct equivalent with identical electrical specifications (75 V, 200 mA, 1.25 V forward voltage) and the same SOD-323 package. No circuit or PCB modifications are required. BAS16HT1G is active in production and RoHS3 compliant.

Q: What is the difference between SOD-323 and SOT-323 packages?

A: SOD-323 (SC-76) and SOT-323 (SC-70) are different physical package formats with different footprints and pin configurations. Parts using SOT-323 require PCB layout modification and cannot be used as drop-in replacements on boards designed for SOD-323 components.

Q: Can BAS16W-AU_R1_000A1 or BAS16WT-TP be used in place of BAS16HT1?

A: These parts are suitable only if the actual circuit current does not exceed 150 mA. Both are rated for 150 mA, which is below the BAS16HT1 specification of 200 mA. Additionally, both use SOT-323 packaging, requiring PCB layout modification. Use these parts only when current requirements are confirmed to be 150 mA or less.

Q: Why is BAS16HT1G preferred over BAS16WS-E3-08?

A: BAS16HT1G is preferred because it is manufactured by onsemi, the original manufacturer, and maintains the exact electrical specifications of the BAS16HT1. BAS16WS-E3-08 (Vishay) has a higher current rating (250 mA) and is classified as a higher-capability alternative rather than a direct equivalent. Both are acceptable substitutes, but BAS16HT1G provides the closest functional match.

Q: Is the higher voltage rating of BAS16HT1G (100 V vs. 75 V) a problem?

A: No. A higher voltage rating provides additional design margin and is not a disadvantage. The part will function correctly in circuits designed for 75 V operation. The higher rating simply indicates greater tolerance for voltage transients and overvoltage conditions.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are RoHS3 compliant. The original BAS16HT1 is non-compliant. This compliance improvement is a significant advantage for new designs and applications subject to RoHS regulations.

Q: What is the inventory status of these substitute parts?

A: BAS16HT1G has the highest inventory availability (2,831,300 units). BAS16WS-E3-08 has 15,100 units. CDSF355B has 36,400 units. BAS16W-AU_R1_000A1 has 3,514 units. BAS16WT-TP has 944 units. Inventory levels should be verified with suppliers for current availability.

Q: Can CDSF355B be used as a substitute?

A: CDSF355B is rated for only 100 mA, which is significantly below the 200 mA requirement. It is suitable only for applications with substantially reduced current demands. Additionally, it uses a different package format (1005/SOD-323F). Use this part only when current requirements are confirmed to be 100 mA or less.

Q: What is the difference in reverse recovery time between these parts?

A: BAS16HT1, BAS16HT1G, BAS16WS-E3-08, and BAS16W-AU_R1_000A1 all have 6 ns reverse recovery time. BAS16WT-TP and CDSF355B have 4 ns, which is faster. Faster recovery time is not a disadvantage and may improve switching performance in high-frequency applications.

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