BAS19_R1_00001 Equivalent & Substitute Parts

Part Overview

The BAS19_R1_00001 is a general-purpose rectifier diode manufactured by Panjit International Inc., rated for 100V DC reverse voltage and 200mA average rectified current in a surface mount SOT-23 package. This component is classified as a small-signal diode suitable for general rectification applications. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter range, enabling component interchangeability in circuit designs without functional degradation.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	200	mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 100 mA	V
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	1	µA @ 100 V
Capacitance @ Vr, F	1.5	pF @ 0V, 1MHz
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the BAS19_R1_00001 is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 100 V
Current - Average Rectified (Io): 200 mA
Package / Case: TO-236-3, SC-59, SOT-23-3 (SOT-23 form factor)
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C to 150°C
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Secondary Parameters (Allowable Variation):

Voltage - Forward (Vf) (Max) @ If: Rated at 1 V or lower
Reverse Recovery Time (trr): Rated at 50 ns or faster
Current - Reverse Leakage @ Vr: Rated at 1 µA or lower
Capacitance @ Vr, F: Rated at 1.5 pF or lower

All identified substitute parts meet or exceed the mandatory equivalence criteria and maintain compatibility within the allowable parameter variation range.

Parameter Comparison

Parameter	BAS19_R1_00001	BAS19-AU_R1_000A1	MMBD4148 RFG	MMBD914-E3-08
Manufacturer	Panjit International Inc.	Panjit International Inc.	Taiwan Semiconductor Corporation	Vishay General Semiconductor - Diodes Division
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	100 V	100 V
Current - Average Rectified (Io)	200 mA	200 mA	200 mA	200 mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 100 mA	1 V @ 100 mA	1 V @ 10 mA	1 V @ 10 mA
Reverse Recovery Time (trr)	50 ns	50 ns	4 ns	4 ns
Current - Reverse Leakage @ Vr	1 µA @ 100 V	1 µA @ 100 V	5 µA @ 75 V	5 µA @ 75 V
Capacitance @ Vr, F	1.5 pF @ 0V, 1MHz	1.5 pF @ 0V, 1MHz	4 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	TO-236-3, SC-59, SOT-23-3
Supplier Device Package	SOT-23	SOT-23	SOT-23	SOT-23-3
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

BAS19-AU_R1_000A1 (Panjit International Inc.)

This substitute maintains identical electrical specifications to the BAS19_R1_00001 across all critical parameters. The BAS19-AU_R1_000A1 carries AEC-Q101 automotive qualification, indicating enhanced reliability screening and qualification for automotive-grade applications. Selection of this part is appropriate when automotive-grade certification is required or when higher inventory availability (3639 pcs) is advantageous. Both parts share the same base product number (BAS19) and are manufactured by the same supplier.

MMBD4148 RFG (Taiwan Semiconductor Corporation)

This substitute meets all mandatory equivalence criteria with improved performance characteristics. The MMBD4148 RFG exhibits faster reverse recovery time (4 ns versus 50 ns), lower capacitance (4 pF versus 1.5 pF), and superior switching speed. These enhancements position this part for applications requiring faster switching performance or reduced parasitic effects. The higher inventory level (12779 pcs) supports supply chain continuity. Forward voltage specification is measured at 10 mA rather than 100 mA, and reverse leakage is specified at 75 V rather than 100 V; both variations remain within acceptable operating margins for general-purpose rectification.

MMBD914-E3-08 (Vishay General Semiconductor - Diodes Division)

This substitute provides equivalent electrical performance with identical switching characteristics to the MMBD4148 RFG. The MMBD914-E3-08 is supplied by Vishay and offers design flexibility through multi-source availability. Performance parameters match the MMBD4148 RFG, including 4 ns reverse recovery time and 4 pF capacitance. The supplier device package designation (SOT-23-3) reflects Vishay's packaging nomenclature while maintaining mechanical and electrical compatibility with the original part.

All three substitute parts maintain Active product status, full RoHS3 compliance, and unlimited moisture sensitivity rating (MSL 1), ensuring regulatory and environmental compatibility with the original BAS19_R1_00001.

Frequently Asked Questions (FAQ)

Q: Can the BAS19-AU_R1_000A1 be used as a direct replacement for the BAS19_R1_00001?

A: Yes. The BAS19-AU_R1_000A1 maintains identical electrical specifications across all critical parameters: 100V reverse voltage, 200mA average rectified current, 1V forward voltage at 100mA, 50ns reverse recovery time, and identical package configuration (SOT-23). The primary distinction is the addition of AEC-Q101 automotive qualification, which represents enhanced reliability screening rather than a functional difference.

Q: What is the difference between the MMBD4148 RFG and MMBD914-E3-08?

A: Both parts exhibit identical electrical performance: 100V reverse voltage, 200mA average rectified current, 4ns reverse recovery time, and 4pF capacitance. The primary difference is manufacturer source (Taiwan Semiconductor Corporation versus Vishay General Semiconductor). Both are electrically and mechanically interchangeable with the BAS19_R1_00001.

Q: Are the MMBD4148 RFG and MMBD914-E3-08 faster than the BAS19_R1_00001?

A: Yes, in terms of reverse recovery time. The MMBD4148 RFG and MMBD914-E3-08 exhibit 4ns reverse recovery time compared to 50ns for the BAS19_R1_00001. This faster switching characteristic reduces parasitic effects and improves performance in high-frequency applications. Both substitute parts also feature lower capacitance (4pF versus 1.5pF), further reducing switching losses.

Q: Can I use these substitutes in automotive applications?

A: The BAS19-AU_R1_000A1 carries explicit AEC-Q101 automotive qualification and is suitable for automotive applications. The MMBD4148 RFG and MMBD914-E3-08 do not carry stated automotive qualification in the provided specifications; their suitability for automotive applications requires verification against specific design requirements and qualification standards.

Q: Are all substitute parts available in the same package?

A: Yes. All parts are supplied in SOT-23 surface mount packages with identical mechanical dimensions (TO-236-3, SC-59, SOT-23-3). Pin configuration and PCB footprint compatibility are maintained across all four parts, enabling direct board-level substitution without layout modification.

Q: What is the difference in forward voltage specifications between parts?

A: The BAS19_R1_00001 and BAS19-AU_R1_000A1 specify forward voltage at 100mA (1V maximum), while the MMBD4148 RFG and MMBD914-E3-08 specify forward voltage at 10mA (1V maximum). The lower measurement current (10mA) in the latter parts represents a more conservative specification point. All parts maintain 1V maximum forward voltage, ensuring compatibility in rectification circuits.

Q: What is the difference in reverse leakage specifications?

A: The BAS19_R1_00001 and BAS19-AU_R1_000A1 specify reverse leakage at 100V (1µA maximum), while the MMBD4148 RFG and MMBD914-E3-08 specify reverse leakage at 75V (5µA maximum). The specification at lower voltage (75V) in the latter parts represents a more conservative measurement condition. All parts maintain acceptable leakage characteristics for general-purpose rectification applications.

Q: Which substitute part should I select for new designs?

A: Selection depends on application requirements. For automotive applications, select BAS19-AU_R1_000A1. For high-frequency or switching applications requiring faster recovery time and lower capacitance, select MMBD4148 RFG or MMBD914-E3-08. For general-purpose rectification with multi-source availability, any substitute provides equivalent performance. Inventory availability and supply chain considerations may also influence selection.

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