Equivalent & Substitute Parts for S3DB

Part Overview

The onsemi S3DB is a general-purpose rectifier diode rated for 200 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AA (SMB) package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Organizations using this diode in active production or maintenance applications require qualified substitute components that maintain electrical and mechanical compatibility while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 3 A	V
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	10	µA @ 200 V
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitution of the S3DB requires matching or exceeding the following critical electrical parameters:

Mandatory Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 200 V minimum
Package / Case: DO-214AA (SMB) surface mount
Mounting Type: Surface Mount
RoHS Compliance: ROHS3 Compliant

Current Rating Consideration: The S3DB is rated for 3 A average rectified current. Substitute parts are grouped into two categories:

Direct Current Equivalents (3 A rated): Parts with 3 A or higher current ratings provide direct functional replacement without circuit redesign.
Lower Current Alternatives (1 A or 2 A rated): Parts with reduced current ratings (1 A or 2 A) are suitable only for applications where the actual circuit current demand does not exceed the substitute part's rating. These require circuit analysis to confirm compatibility.

Recovery Speed Characteristics: The S3DB exhibits standard recovery characteristics (>500 ns). Substitute parts with faster recovery times (≤500 ns) are electrically compatible and may provide improved performance in switching applications.

Temperature Range: The S3DB operates from -55°C to 150°C. Substitute parts with equal or wider temperature ranges maintain full compatibility across the operating envelope.

Parameter Comparison

Parameter	S3DB (Main)	CMR1-02 BK	CMR1-02 TR13	CMR1S-02 BK	CMR1S-02 TR13	CMR1U-02 BK	CMR1U-02 TR13	CMR2-02 BK	CMR2-02 TR13	CMR2U-02 BK	CMR2U-02 TR13
Manufacturer	onsemi	Central Semiconductor	Central Semiconductor	Central Semiconductor	Central Semiconductor	Central Semiconductor	Central Semiconductor	Central Semiconductor	Central Semiconductor	Central Semiconductor	Central Semiconductor
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 V	200 V	200 V	200 V	200 V	200 V	200 V	200 V
Current - Average Rectified (Io)	3 A	1 A	1 A	1 A	1 A	1 A	1 A	2 A	2 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 3 A	1.1 V @ 1 A	1.1 V @ 1 A	950 mV @ 1 A	950 mV @ 1 A	1 V @ 1 A	1 V @ 1 A	1.1 V @ 2 A	1.1 V @ 2 A	1 V @ 2 A	1 V @ 2 A
Speed	Standard Recovery >500ns	Standard Recovery >500ns	Fast Recovery ≤500ns	Fast Recovery ≤500ns	Fast Recovery ≤500ns	Fast Recovery ≤500ns	Fast Recovery ≤500ns	Standard Recovery >500ns	Standard Recovery >500ns	Fast Recovery ≤500ns	Fast Recovery ≤500ns
Reverse Recovery Time (trr)	1.5 µs	—	—	35 ns	35 ns	50 ns	50 ns	2.5 µs	2.5 µs	50 ns	50 ns
Current - Reverse Leakage @ Vr	10 µA @ 200 V	10 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	10 µA @ 200 V	10 µA @ 200 V
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 175°C	-65 to 175°C	-65 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Not For New Designs	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Packaging	Tape & Reel (TR)	Bulk	Tape & Reel (TR)	Bulk	Tape & Reel (TR)	Bulk	Tape & Reel (TR)	Bulk	Tape & Reel (TR)	Bulk	Tape & Reel (TR)

Engineering Selection Recommendations

Current Rating Compatibility:

The S3DB is rated for 3 A average rectified current. All listed substitute parts from Central Semiconductor Corp are rated at either 1 A or 2 A. Selection of a substitute part requires confirmation that the actual circuit current demand does not exceed the substitute part's rating.

1 A Rated Substitutes (CMR1 series): Suitable for circuits with maximum current draw up to 1 A.
2 A Rated Substitutes (CMR2 series): Suitable for circuits with maximum current draw up to 2 A.

Product Status and Compliance:

All substitute parts listed carry "Active" product status, ensuring continued availability and manufacturing support. All substitute parts maintain ROHS3 compliance and are manufactured with lead-free processes (PBFREE designation), meeting current environmental and regulatory requirements.

Packaging Options:

Substitute parts are available in two packaging formats:

Bulk (BK): Loose component packaging, suitable for manual assembly or small-volume applications.
Tape & Reel (TR13): Automated assembly packaging, required for high-volume surface mount production.

Selection between bulk and tape & reel packaging depends on assembly process requirements and production volume.

Recovery Characteristics:

The S3DB exhibits standard recovery characteristics (>500 ns). Substitute parts with faster recovery times (≤500 ns) are electrically compatible. Fast recovery variants (CMR1-02 TR13, CMR1S-02 series, CMR1U-02 series, CMR2U-02 series) may provide improved performance in high-frequency switching applications but are not required for standard rectification circuits.

Temperature Range:

The S3DB operates from -55°C to 150°C. All substitute parts operate from -65°C to 150°C or -65°C to 175°C, providing equal or extended temperature coverage. The CMR1U-02 and CMR1U-02 TR13 variants extend the upper temperature limit to 175°C, suitable for high-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can I use a 1 A or 2 A rated substitute in place of the 3 A S3DB?

A: Substitution is possible only if the actual circuit current demand does not exceed the substitute part's rating. The substitute part's current rating must be equal to or greater than the maximum current the circuit will draw. Use of an undersized component will result in component failure or circuit malfunction.

Q: What is the difference between CMR1-02 BK and CMR1-02 TR13?

A: Both parts are electrically identical 1 A rated diodes with 200 V reverse voltage in DO-214AA (SMB) package. The difference is packaging format: BK (Bulk) is loose component packaging for manual assembly, while TR13 (Tape & Reel) is automated assembly packaging. Selection depends on production assembly method.

Q: Are fast recovery variants (CMR1S-02, CMR1U-02, CMR2U-02) compatible with the S3DB circuit?

A: Yes. Fast recovery variants are electrically compatible with the S3DB. The faster reverse recovery time (35 ns to 50 ns versus 1.5 µs) represents an improvement in switching performance and will not cause circuit incompatibility. These variants are suitable for high-frequency switching applications.

Q: Does the S3DB have automotive qualification?

A: Yes. The S3DB carries AEC-Q101 automotive qualification. Substitute parts from Central Semiconductor Corp do not list AEC-Q101 qualification in the provided specifications. For automotive applications requiring AEC-Q101 certification, alternative qualified sources must be evaluated.

Q: What is the difference between CMR1S-02 and CMR1U-02?

A: Both are 1 A rated, 200 V reverse voltage diodes with fast recovery characteristics in DO-214AA (SMB) package. The CMR1S-02 has a forward voltage of 950 mV @ 1 A and reverse recovery time of 35 ns. The CMR1U-02 has a forward voltage of 1 V @ 1 A and reverse recovery time of 50 ns. The CMR1U-02 extends the operating temperature range to 175°C. Selection depends on specific circuit requirements for forward voltage drop and temperature range.

Q: Can I substitute a CMR2-02 (2 A) for the S3DB (3 A)?

A: Substitution is possible only if the actual circuit current demand does not exceed 2 A. If the circuit requires the full 3 A capability of the S3DB, a 2 A substitute will be undersized and unsuitable. Circuit analysis is required to confirm maximum current draw.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance and are manufactured with lead-free processes (PBFREE designation).

Q: What is the difference between standard recovery and fast recovery diodes?

A: The S3DB has standard recovery characteristics with a reverse recovery time of 1.5 µs. Fast recovery variants have reverse recovery times of 35 ns to 50 ns. Fast recovery diodes switch off more quickly, reducing switching losses and improving efficiency in high-frequency applications. Standard recovery diodes are suitable for line-frequency rectification and low-frequency switching applications.

Q: Can I use CMR1U-02 TR13 in a -55°C to 150°C temperature range application?

A: Yes. The CMR1U-02 TR13 operates from -65°C to 175°C, which encompasses the -55°C to 150°C range. The extended temperature range provides full compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message