S5MBH Equivalent & Substitute Parts

Part Overview

The S5MBH is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 1000 V DC reverse voltage and 5 A average rectified current in a surface mount DO-214AA (SMB) package. This component is classified as Active product status with AEC-Q101 automotive qualification and ROHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	5	A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 5 A	V
Speed	Standard Recovery >500ns, > 200mA (Io)	-
Current - Reverse Leakage @ Vr	10	µA @ 1000 V
Package / Case	DO-214AA, SMB	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the S5MBH are grouped based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal 1000 V
Package / Case: Must be DO-214AA (SMB) or compatible surface mount package
Mounting Type: Must be Surface Mount
RoHS Status: Must be ROHS3 Compliant
Moisture Sensitivity Level: Must be 1 (Unlimited)

Secondary Compatibility Parameters:

Current - Average Rectified (Io): Acceptable range 2 A to 5 A (lower current ratings acceptable for current-limited applications)
Voltage - Forward (Vf) (Max): Acceptable range 1.1 V to 1.7 V @ rated current
Speed: Standard Recovery (>500ns) or Fast Recovery (≤500ns) both acceptable
Current - Reverse Leakage @ Vr: Acceptable range 5 µA to 10 µA @ 1000 V
Operating Temperature - Junction: Must support -55°C to 150°C or equivalent range

Substitute parts with lower current ratings (2 A or 3 A) are functionally equivalent when the application circuit does not require the full 5 A capacity. Parts with different recovery speeds remain compatible as both standard and fast recovery technologies meet general-purpose rectification requirements.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	Speed	Ir @ Vr [µA]	Package	Tj Range [°C]
S5MBH	Taiwan Semiconductor Corporation	1000	5	1.1 @ 5A	Standard >500ns	10 @ 1000V	DO-214AA (SMB)	-55 to 150
CFRB207-G	Comchip Technology	1000	2	1.3 @ 2A	Fast ≤500ns	5 @ 1000V	DO-214AA (SMB)	-40 to 150
CGRB307-G	Comchip Technology	1000	3	1.1 @ 3A	Standard >500ns	5 @ 1000V	DO-214AA (SMB)	-40 to 150
CURB207-G	Comchip Technology	1000	2	1.7 @ 2A	Fast ≤500ns	5 @ 1000V	DO-214AA (SMB)	-40 to 150
ER3MB-TP	Micro Commercial Co	1000	3	1.7 @ 3A	Fast ≤500ns	5 @ 1000V	DO-214AA (SMB)	-55 to 150
RS2M-13-F	Diodes Incorporated	1000	1.5	1.3 @ 1.5A	Fast ≤500ns	5 @ 1000V	DO-214AA (SMB)	-65 to 150
S2M-LTP	Micro Commercial Co	1000	2	1.15 @ 2A	Fast ≤500ns	5 @ 1000V	DO-214AA (SMB)	-55 to 150
S2M-13-F	Diodes Incorporated	1000	1.5	1.15 @ 1.5A	Standard >500ns	5 @ 1000V	DO-214AA (SMB)	-65 to 150

Engineering Selection Recommendations

Full Current Capacity Substitutes (5 A Equivalent): The S5MBH has no direct 5 A equivalent substitute in the provided list. All identified substitutes have lower current ratings (1.5 A to 3 A). Selection of lower-rated parts is appropriate only when circuit analysis confirms that peak rectified current does not exceed the substitute part's Io specification.

3 A Current Rating Substitutes: CGRB307-G and ER3MB-TP both provide 3 A capacity in DO-214AA (SMB) package with 1000 V reverse voltage rating. CGRB307-G maintains standard recovery speed matching the S5MBH characteristic. ER3MB-TP provides fast recovery with extended temperature range (-55°C to 150°C) matching the S5MBH operating window. Both parts carry ROHS3 compliance and MSL 1 rating.

2 A Current Rating Substitutes: CFRB207-G, CURB207-G, and S2M-LTP provide 2 A capacity. CFRB207-G and CURB207-G are Comchip Technology products with fast recovery characteristics. S2M-LTP (Micro Commercial Co) offers fast recovery with forward voltage of 1.15 V @ 2 A and operating temperature range of -55°C to 150°C, providing closest thermal alignment to the S5MBH.

1.5 A Current Rating Substitutes: RS2M-13-F and S2M-13-F (both Diodes Incorporated) provide 1.5 A capacity. RS2M-13-F features fast recovery with extended temperature range (-65°C to 150°C). S2M-13-F maintains standard recovery speed with forward voltage of 1.15 V @ 1.5 A and -65°C to 150°C operating range.

Compliance and Qualification: All identified substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. The S5MBH carries AEC-Q101 automotive qualification; substitute parts do not explicitly list this qualification in provided data. Applications requiring automotive qualification should confirm AEC-Q101 status with manufacturers before substitution.

Frequently Asked Questions (FAQ)

Q: Can I use a 3 A rated diode in place of the 5 A S5MBH?

A: Yes, provided circuit analysis confirms that the average rectified current does not exceed 3 A. The 3 A substitute parts (CGRB307-G, ER3MB-TP) maintain the same 1000 V reverse voltage rating and DO-214AA (SMB) package. Lower current ratings are acceptable when application requirements do not demand the full 5 A capacity.

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

A: Standard recovery diodes have reverse recovery time greater than 500 ns, while fast recovery diodes have reverse recovery time of 500 ns or less. Both types are functionally compatible for general-purpose rectification. Fast recovery diodes reduce switching losses in high-frequency applications but are not required for standard 50/60 Hz line frequency rectification.

Q: Are all substitute parts in the same DO-214AA (SMB) package?

A: Yes. All identified substitute parts use the DO-214AA (SMB) surface mount package, ensuring mechanical and footprint compatibility with the S5MBH. Package compatibility eliminates the need for PCB redesign.

Q: Does the S5MBH have automotive qualification?

A: The S5MBH carries AEC-Q101 automotive qualification. Substitute parts in the provided list do not explicitly document AEC-Q101 status. Applications requiring automotive qualification should verify this certification with the substitute part manufacturer before implementation.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 (Unlimited) indicates that the component has unlimited shelf life and does not require special moisture control during storage or handling. All identified substitute parts carry MSL 1 rating, matching the S5MBH moisture sensitivity specification.

Q: Can I substitute a part with lower forward voltage drop?

A: Yes. Lower forward voltage drop (Vf) reduces power dissipation and heat generation. Substitute parts with Vf values of 1.1 V to 1.15 V @ rated current provide improved efficiency compared to parts with 1.3 V to 1.7 V specifications. S2M-LTP (1.15 V @ 2A) and S2M-13-F (1.15 V @ 1.5A) offer reduced forward voltage characteristics.

Q: What is the operating temperature range requirement?

A: The S5MBH operates from -55°C to 150°C junction temperature. Most substitute parts support -40°C to 150°C or -65°C to 150°C ranges. Parts with -65°C lower limit (RS2M-13-F, S2M-13-F) provide extended cold temperature capability. Parts with -40°C lower limit (Comchip Technology products) remain suitable for standard industrial and automotive applications.

Q: How do I determine if a lower current rating substitute is acceptable?

A: Review the circuit schematic and load analysis to establish the maximum average rectified current (Io) requirement. If peak current does not exceed the substitute part's Io specification under worst-case conditions (maximum input voltage, minimum load resistance), the lower-rated part is acceptable. Thermal analysis should confirm that power dissipation remains within acceptable limits.

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