Equivalent & Substitute Parts for S3B-13

Part Overview

The S3B-13 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 100 V DC reverse voltage and 3 A average rectified current in a Surface Mount SMC (DO-214AB) package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 3 A	V
Speed	Standard Recovery >500ns, > 200mA (Io)	-
Current - Reverse Leakage @ Vr	10	µA @ 100 V
Package / Case	DO-214AB, SMC	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-65°C ~ 150°C	-

Substitute Part Grouping Explanation

Substitution of the S3B-13 is determined by strict equivalence in the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 100 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount

Secondary Parameters Affecting Compatibility:

Voltage - Forward (Vf) (Max) @ If: Maximum 1.15 V @ 3 A
Current - Reverse Leakage @ Vr: 10 µA @ 100 V
Speed: Standard or Fast Recovery acceptable
Operating Temperature - Junction: Minimum -55°C to maximum 150°C

All identified substitute parts maintain the critical electrical ratings and physical package specifications. Variations in forward voltage, recovery speed, and reverse leakage remain within acceptable operational ranges for general-purpose rectification applications.

Parameter Comparison

Parameter	S3B-13 (Diodes Inc.)	S3B-13-F (Diodes Inc.)	ES3B (Taiwan Semi.)	RS3B-E3/57T (Vishay)	S3B (Diotec)	S3B-TP (Micro Commercial)
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	100 V	100 V	100 V	100 V
Current - Average Rectified (Io)	3 A	3 A	3 A	3 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 3 A	1.15 V @ 3 A	950 mV @ 3 A	1.3 V @ 2.5 A	1.15 V @ 3 A	1.2 V @ 3 A
Speed	Standard Recovery >500ns	Standard Recovery >500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Standard Recovery >500ns	Standard Recovery >500ns
Current - Reverse Leakage @ Vr	10 µA @ 100 V	10 µA @ 100 V	10 µA @ 100 V	10 µA @ 100 V	5 µA @ 100 V	10 µA @ 100 V
Package / Case	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC
Operating Temperature - Junction	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-50°C ~ 150°C	-55°C ~ 150°C
Product Status	Discontinued	Active	Active	Active	Active	Not For New Designs
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: S3B-13-F (Diodes Incorporated)

The S3B-13-F is the direct parametric equivalent to the S3B-13, manufactured by the same supplier with identical electrical specifications. This part is currently active in production with ROHS3 compliance and is available in Cut Tape and Digi-Reel packaging formats. The S3B-13-F maintains the full operating temperature range of -65°C to 150°C and is the preferred replacement for discontinued S3B-13 applications.

Secondary Substitutes: ES3B (Taiwan Semiconductor Corporation) and RS3B-E3/57T (Vishay General Semiconductor)

Both ES3B and RS3B-E3/57T meet all critical electrical and mechanical requirements with active product status and ROHS3 compliance. The ES3B features improved forward voltage characteristics (950 mV @ 3 A) and fast recovery performance (≤ 500 ns). The RS3B-E3/57T provides fast recovery operation with 150 ns reverse recovery time. Both parts operate within the -55°C to 150°C temperature range, which encompasses the majority of standard industrial applications.

Alternative Substitute: S3B (Diotec Semiconductor)

The S3B from Diotec Semiconductor provides electrical equivalence with identical forward voltage and standard recovery characteristics. This part is active and ROHS3 compliant. The operating temperature range is -50°C to 150°C, which is suitable for applications not requiring the extended low-temperature performance of the original S3B-13.

Not Recommended for New Designs: S3B-TP (Micro Commercial Co)

The S3B-TP meets all electrical and mechanical substitution criteria and is ROHS3 compliant. However, this part carries a "Not For New Designs" product status designation and should be reserved for legacy system maintenance only.

Frequently Asked Questions (FAQ)

Q: Can the S3B-13-F be used as a direct replacement for the S3B-13?

A: Yes. The S3B-13-F is a parametric equivalent with identical voltage rating (100 V), current rating (3 A), forward voltage (1.15 V @ 3 A), and package (DO-214AB, SMC). The primary difference is product status: S3B-13-F is active while S3B-13 is discontinued. Both parts are manufactured by Diodes Incorporated.

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

A: The S3B-13 specifies standard recovery with >500 ns recovery time. The ES3B and RS3B-E3/57T offer fast recovery (≤ 500 ns), which reduces switching losses in high-frequency applications. Standard recovery substitutes (S3B-13-F, S3B, S3B-TP) maintain the original recovery characteristics. Fast recovery variants are electrically compatible and may improve performance in switching applications.

Q: Are all substitute parts RoHS compliant?

A: The S3B-13 is RoHS non-compliant. All identified substitutes (S3B-13-F, ES3B, RS3B-E3/57T, S3B, S3B-TP) are ROHS3 compliant, meeting current environmental and regulatory requirements for new production.

Q: What is the significance of the operating temperature range differences?

A: The S3B-13 operates from -65°C to 150°C. Substitutes operate within -50°C to -55°C minimum temperatures. For applications requiring operation below -50°C, the S3B-13-F (which maintains -65°C minimum) is the appropriate selection. For standard industrial applications, all substitutes are suitable.

Q: Can I use ES3B or RS3B-E3/57T in place of S3B-13 in existing designs?

A: Yes. Both parts maintain the critical electrical parameters (100 V, 3 A, DO-214AB package) and are pin-compatible. The ES3B features lower forward voltage (950 mV vs. 1.15 V), which may reduce power dissipation. The RS3B-E3/57T has slightly higher forward voltage (1.3 V @ 2.5 A) but offers fast recovery characteristics. Both are suitable for general-purpose rectification applications.

Q: What packaging options are available for substitutes?

A: S3B-13-F is available in Cut Tape (CT) and Digi-Reel formats. RS3B-E3/57T is supplied in Cut Tape. S3B and ES3B packaging specifications are not detailed in the provided data. S3B-TP is supplied in Tape & Reel (TR) format. Verify packaging availability with your supplier for production requirements.

Q: Should I use S3B-TP for new designs?

A: No. The S3B-TP carries a "Not For New Designs" product status. This part is suitable only for maintenance and repair of existing systems. For new designs, select from S3B-13-F, ES3B, RS3B-E3/57T, or S3B.

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