CGRB207-G Equivalent & Substitute Parts Reference

Part Overview

The CGRB207-G is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 1000 V DC reverse voltage and 2 A average rectified current in a Surface Mount DO-214AA (SMB) package. This component is classified as Active product status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical performance can be achieved within the allowed parameter ranges for this diode category, maintaining compatibility with Surface Mount DO-214AA packaging and meeting industrial compliance standards.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.1 @ 2	V @ A
Current - Reverse Leakage @ Vr	5	µA @ 1000 V
Speed	Standard Recovery >500ns	-
Package / Case	DO-214AA, SMB	-
Operating Temperature - Junction (Max)	150	°C
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the CGRB207-G are evaluated based on the following critical parameters that determine functional equivalence:

Primary Compatibility Criteria:

Package / Case: DO-214AA, SMB (mandatory match)
Voltage - DC Reverse (Vr) (Max): Equal to or greater than 1000 V
Current - Average Rectified (Io): Equal to or greater than 2 A
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitution Logic: Parts meeting or exceeding the reverse voltage and current ratings while maintaining identical packaging and compliance certifications are classified as functional equivalents. Forward voltage characteristics and recovery speed are secondary parameters that may vary within standard rectifier diode specifications.

Parameter Comparison

Parameter	CGRB207-G (Main)	S5MB (Substitute)	STTH208U (Substitute)
Manufacturer	Comchip Technology	Taiwan Semiconductor Corporation	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	800 V
Current - Average Rectified (Io)	2 A	5 A	2 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 2 A	1.1 V @ 5 A	1.65 V @ 2 A
Current - Reverse Leakage @ Vr	5 µA @ 1000 V	10 µA @ 1000 V	5 µA @ 800 V
Speed	Standard Recovery >500ns	Standard Recovery >500ns	Fast Recovery ≤ 500ns
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Operating Temperature - Junction (Max)	150°C	150°C	175°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

S5MB (Taiwan Semiconductor Corporation): The S5MB is a direct functional equivalent with identical reverse voltage rating (1000 V) and superior current capacity (5 A versus 2 A). Both components share identical forward voltage characteristics (1.1 V), standard recovery speed classification, and full compliance with RoHS3 and MSL 1 specifications. The S5MB provides design margin for applications requiring higher current handling without voltage derating.

STTH208U (STMicroelectronics): The STTH208U operates at a reduced reverse voltage rating of 800 V, which represents a 20% voltage derating relative to the CGRB207-G specification. This component is suitable only for applications where the maximum reverse voltage requirement does not exceed 800 V. The STTH208U features fast recovery characteristics (≤ 500ns) and higher maximum junction temperature (175°C). All three components maintain identical RoHS3 compliance and MSL 1 moisture sensitivity ratings.

Frequently Asked Questions (FAQ)

Q: Can the S5MB replace the CGRB207-G in all applications?

A: The S5MB meets or exceeds all critical electrical parameters of the CGRB207-G (1000 V reverse voltage, 2 A minimum current capacity) and shares identical packaging (DO-214AA, SMB) and compliance certifications. Substitution is valid for applications designed to the CGRB207-G specification.

Q: What is the key limitation of the STTH208U as a substitute?

A: The STTH208U has a maximum reverse voltage rating of 800 V, compared to 1000 V for the CGRB207-G. This component is not suitable for circuits requiring the full 1000 V reverse voltage specification. Use STTH208U only when application reverse voltage requirements do not exceed 800 V.

Q: Are all three diodes in the same physical package?

A: Yes. The CGRB207-G, S5MB, and STTH208U all use the DO-214AA (SMB) Surface Mount package, ensuring mechanical and thermal compatibility on printed circuit boards.

Q: Do all substitute parts have the same moisture sensitivity level?

A: Yes. All three components are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: How do forward voltage characteristics differ among these parts?

A: The CGRB207-G and S5MB both specify 1.1 V maximum forward voltage at their respective rated currents. The STTH208U specifies 1.65 V maximum forward voltage at 2 A, representing higher forward voltage drop. This difference may affect power dissipation in high-frequency switching applications.

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

A: The CGRB207-G and S5MB are classified as standard recovery (>500ns), while the STTH208U is fast recovery (≤ 500ns). Fast recovery diodes exhibit shorter reverse recovery time, reducing switching losses in high-frequency applications. Standard recovery diodes are suitable for line-frequency and low-frequency rectification.

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