BAS19-7 Equivalent & Substitute Parts

Part Overview

The BAS19-7 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 100 V DC reverse voltage and 200 mA average rectified current in a surface-mount SOT-23-3 package. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating different packaging formats and manufacturer offerings.

Key Parameters

Parameter	BAS19-7 Specification
Voltage - DC Reverse (Vr) (Max)	100 V
Current - Average Rectified (Io)	200 mA
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 200 mA
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	100 nA @ 100 V
Capacitance @ Vr, F	5 pF @ 0 V, 1 MHz
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
Operating Temperature - Junction	-65°C ~ 150°C
Technology	Standard
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the BAS19-7 are grouped based on electrical parameter compatibility within the following criteria:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) rating equal to or greater than 100 V
Current - Average Rectified (Io) equal to or greater than 200 mA
Reverse Recovery Time (trr) equal to or less than 50 ns
Package compatibility: TO-236-3, SC-59, or SOT-23-3 surface-mount configurations
Technology classification: Standard rectifier diode

Secondary Considerations:

Forward voltage (Vf) characteristics at rated current
Reverse leakage current specifications
Operating temperature range
RoHS and regulatory compliance status
Product status (active vs. discontinued)

Parts meeting these criteria are classified as direct electrical equivalents regardless of manufacturer or packaging format (bulk, tape & reel, or cut tape).

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Package	Product Status	RoHS Status
BAS19-7	Diodes Incorporated	100 V	200 mA	1.25 V @ 200 mA	50 ns	SOT-23-3	Discontinued	Non-compliant
BAS19-7-F	Diodes Incorporated	100 V	200 mA	1.25 V @ 200 mA	50 ns	SOT-23-3	Active	ROHS3 Compliant
BAS19,215	Nexperia USA Inc.	100 V	200 mA	1.25 V @ 200 mA	50 ns	TO-236AB	Active	ROHS3 Compliant
BAS19,235	Nexperia USA Inc.	100 V	200 mA	1.25 V @ 200 mA	50 ns	TO-236AB	Active	ROHS3 Compliant
BAS19LT1G	onsemi	120 V	200 mA	1.25 V @ 200 mA	50 ns	SOT-23-3	Active	ROHS3 Compliant
BAS19LT3G	onsemi	120 V	200 mA	1.25 V @ 200 mA	50 ns	SOT-23-3	Active	ROHS3 Compliant
BAS29	onsemi	120 V	200 mA	1 V @ 200 mA	50 ns	SOT-23-3	Active	ROHS3 Compliant
BAS29,215	Nexperia USA Inc.	90 V	250 mA	1 V @ 200 mA	50 ns	TO-236AB	Active	ROHS3 Compliant
MMBD1201	onsemi	100 V	200 mA	1 V @ 200 mA	4 ns	SOT-23-3	Active	ROHS3 Compliant
MMBD914LT3G	onsemi	100 V	200 mA	1 V @ 10 mA	4 ns	SOT-23-3	Active	ROHS3 Compliant
NSVBAS19LT1G	onsemi	120 V	200 mA	1.25 V @ 200 mA	50 ns	SOT-23-3	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Electrical Equivalents (100 V, 200 mA, 50 ns Recovery):

BAS19-7-F is the primary substitute, offering identical electrical specifications with active product status and ROHS3 compliance. This part maintains the original Diodes Incorporated manufacturing lineage with tape & reel packaging.

BAS19,215 and BAS19,235 (Nexperia USA Inc.) provide equivalent 100 V / 200 mA performance with automotive-grade qualification (AEC-Q100) and TO-236AB packaging. These parts are suitable for applications requiring automotive-level reliability.

Higher Voltage Alternatives (120 V Rating):

BAS19LT1G, BAS19LT3G, and NSVBAS19LT1G (onsemi) offer 120 V reverse voltage ratings with identical 200 mA current and 50 ns recovery specifications. These parts provide voltage margin above the original 100 V specification and are ROHS3 compliant. BAS19LT1G and BAS19LT3G differ only in packaging format (both SOT-23-3). NSVBAS19LT1G provides the same electrical performance in SOT-23-3 packaging.

BAS29 (onsemi) operates at 120 V with improved forward voltage characteristics (1 V @ 200 mA vs. 1.25 V), reducing power dissipation in rectification circuits.

Lower Voltage Alternative:

BAS29,215 (Nexperia USA Inc.) operates at 90 V reverse voltage with increased current capacity (250 mA) and automotive qualification. This part is suitable only for applications where 90 V reverse voltage rating is acceptable.

Faster Recovery Alternatives:

MMBD1201 and MMBD914LT3G (onsemi) provide 4 ns reverse recovery time compared to the original 50 ns specification. These parts maintain 100 V / 200 mA ratings and are suitable for high-frequency switching applications requiring faster diode response.

Compliance Considerations:

All recommended substitutes are ROHS3 compliant, addressing regulatory requirements absent in the original BAS19-7. Parts designated with automotive qualification (BAS19,215, BAS19,235, BAS29,215) meet AEC-Q100 standards for automotive applications.

Frequently Asked Questions (FAQ)

Q: Can BAS19-7-F be used as a direct replacement for BAS19-7?

A: Yes. BAS19-7-F maintains identical electrical specifications (100 V, 200 mA, 50 ns recovery) and SOT-23-3 packaging. The primary difference is active product status and ROHS3 compliance. Tape & reel packaging may require adjustment to assembly processes if the original used bulk or cut-tape formats.

Q: What is the difference between BAS19,215 and BAS19,235?

A: Both parts are manufactured by Nexperia USA Inc. with identical electrical specifications and automotive qualification. The difference lies in packaging designation (both TO-236AB) and inventory availability. Electrical performance and compatibility are equivalent.

Q: Can BAS19LT1G or BAS19LT3G replace BAS19-7 in all applications?

A: Yes, with voltage margin consideration. Both parts provide 120 V reverse voltage rating compared to the original 100 V specification, making them suitable for any circuit designed for 100 V operation. The 20 V additional rating provides design margin without performance degradation. Identical current (200 mA) and recovery time (50 ns) specifications ensure functional compatibility.

Q: What is the advantage of MMBD1201 or MMBD914LT3G over BAS19-7?

A: These parts offer significantly faster reverse recovery time (4 ns vs. 50 ns), reducing switching losses in high-frequency applications. Both maintain 100 V / 200 mA ratings. Selection depends on circuit operating frequency; faster recovery is beneficial in switching power supplies and high-frequency rectification circuits.

Q: Is BAS29 a suitable substitute despite lower forward voltage?

A: Yes. BAS29 operates at 120 V with 200 mA current rating and 50 ns recovery time. The lower forward voltage (1 V @ 200 mA vs. 1.25 V) reduces power dissipation, making it advantageous in power-sensitive applications. The 20 V voltage margin provides additional design safety.

Q: Can BAS29,215 be used as a substitute?

A: BAS29,215 is suitable only for applications where 90 V reverse voltage rating is acceptable. This part provides increased current capacity (250 mA) and automotive qualification but operates below the original 100 V specification. Use only when circuit design confirms 90 V maximum reverse voltage exposure.

Q: What packaging formats are available for substitutes?

A: Substitutes are available in SOT-23-3 (TO-236) and TO-236AB formats. Both are surface-mount packages with identical physical dimensions and pin configurations. Packaging format selection depends on assembly equipment compatibility and tape & reel vs. bulk availability requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts carry ROHS3 compliance status. The original BAS19-7 is RoHS non-compliant. Substitution addresses both functional equivalence and regulatory compliance requirements.

Q: Which substitute offers the best inventory availability?

A: BAS19LT1G (onsemi) provides the highest inventory level at 355,400 pieces. BAS19LT3G (48,712 pieces) and NSVBAS19LT1G (71,064 pieces) also offer substantial stock. BAS19-7-F (29,000 pieces) provides the closest direct equivalent with active status.

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