STTH802CB Equivalent & Substitute Parts

Part Overview

The STTH802CB is a general-purpose diode array manufactured by STMicroelectronics, configured as a 1 Pair Common Cathode with 200 V reverse voltage rating and 4 A average rectified current per diode. The device is housed in a Surface Mount TO-252-3 DPAK package with 2 leads plus tab (SC-63).

The STTH802CB is classified as Obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Voltage - DC Reverse (Vr) (Max)	200 V
Current - Average Rectified (Io) (per Diode)	4 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 4 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	20 ns
Current - Reverse Leakage @ Vr	4 µA @ 200 V
Operating Temperature - Junction (Max)	175°C
Mounting Type	Surface Mount
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the STTH802CB is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Diode Configuration: 1 Pair Common Cathode
Voltage - DC Reverse (Vr) (Max): 200 V minimum
Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type: Surface Mount

Performance Parameters (Application-Dependent):

Current - Average Rectified (Io) (per Diode): Equal to or greater than 4 A
Voltage - Forward (Vf) (Max): Equal to or less than 1.1 V @ rated current
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction: 175°C or higher

Substitute parts are grouped based on whether they meet all mandatory criteria and maintain electrical performance within acceptable ranges for the application. Parts with higher current ratings or improved thermal characteristics are suitable for direct substitution in applications where the STTH802CB is specified, provided all mandatory parameters align.

Parameter Comparison

Parameter	STTH802CB	STTH1002CB	MSRD620CTG	MSRD620CTT4G	SBR6200CTL-13	SDURD820
Manufacturer	STMicroelectronics	STMicroelectronics	onsemi	onsemi	Diodes Incorporated	SMC Diode Solutions
Product Status	Obsolete	Active	Obsolete	Active	Active	Active
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	Single Diode
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 V	200 V	200 V
Current - Average Rectified (Io)	4 A	8 A	3 A	3 A	3 A	8 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 4 A	1.1 V @ 5 A	1.15 V @ 3 A	1.15 V @ 3 A	850 mV @ 3 A	1.2 V @ 8 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	20 ns	25 ns	55 ns	55 ns	Not specified	35 ns
Current - Reverse Leakage @ Vr	4 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	100 µA @ 200 V	5 µA @ 200 V
Operating Temperature - Junction (Max)	175°C	175°C	175°C	175°C	175°C	150°C
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: STTH1002CB

The STTH1002CB is the recommended primary substitute for the STTH802CB. Both devices are manufactured by STMicroelectronics and share identical diode configuration, reverse voltage rating, package type, and thermal specifications. The STTH1002CB provides double the current rating (8 A versus 4 A), forward voltage characteristics remain compatible at 1.1 V, and reverse recovery time is marginally increased (25 ns versus 20 ns). The STTH1002CB is classified as Active, ensuring long-term availability and supply chain continuity. This part is suitable for direct substitution in all applications where the STTH802CB was originally specified.

Secondary Substitutes: MSRD620CTT4G and SBR6200CTL-13

The MSRD620CTT4G (onsemi SWITCHMODE™ series) and SBR6200CTL-13 (Diodes Incorporated SBR® series) are alternative substitutes meeting the mandatory compatibility criteria. Both maintain 200 V reverse voltage rating, TO-252-3 DPAK packaging, and Surface Mount configuration. The MSRD620CTT4G is classified as Active with extensive inventory availability. The SBR6200CTL-13 features lower forward voltage (850 mV @ 3 A) due to Super Barrier technology, reducing power dissipation in applications with 3 A or lower current requirements. However, both parts are rated for 3 A current, which is below the STTH802CB specification of 4 A. These parts are suitable for applications where current requirements do not exceed 3 A.

Alternative Substitute: SDURD820

The SDURD820 (SMC Diode Solutions) is a single diode device rated for 8 A at 200 V in TO-252-3 DPAK packaging. This part does not match the 1 Pair Common Cathode configuration of the STTH802CB and is not recommended for direct substitution in applications requiring dual-diode array functionality.

Obsolete Parts: MSRD620CTG

The MSRD620CTG is classified as Obsolete. While it meets mandatory compatibility criteria, the Obsolete status indicates limited availability and potential supply discontinuation. The MSRD620CTT4G (Active status, Tape & Reel packaging) is the preferred alternative within the onsemi SWITCHMODE™ series.

Compliance and Certification:

All recommended substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and EAR99 ECCN classification, consistent with the STTH802CB. The SDURD820 is noted as REACH Affected, whereas all other substitutes are REACH Unaffected.

Frequently Asked Questions (FAQ)

Q: Can the STTH1002CB directly replace the STTH802CB in my circuit?

A: Yes. The STTH1002CB is a direct substitute for the STTH802CB. Both devices share identical diode configuration (1 Pair Common Cathode), reverse voltage rating (200 V), package type (TO-252-3 DPAK), and maximum junction temperature (175°C). The STTH1002CB provides higher current capacity (8 A versus 4 A), making it suitable for applications originally designed for the 4 A STTH802CB. Forward voltage characteristics remain compatible at 1.1 V.

Q: What is the difference between the MSRD620CTG and MSRD620CTT4G?

A: Both parts are manufactured by onsemi and share identical electrical specifications: 200 V reverse voltage, 3 A current rating, 1 Pair Common Cathode configuration, and TO-252-3 DPAK packaging. The primary difference is product status and packaging format. The MSRD620CTG is Obsolete, while the MSRD620CTT4G is Active and supplied in Tape & Reel format. For new designs and ongoing production, the MSRD620CTT4G is the preferred choice due to Active status and superior supply availability.

Q: Can I use the SBR6200CTL-13 in place of the STTH802CB?

A: The SBR6200CTL-13 meets the mandatory compatibility criteria: 200 V reverse voltage, 1 Pair Common Cathode configuration, and TO-252-3 DPAK packaging. However, the SBR6200CTL-13 is rated for 3 A current, which is below the STTH802CB specification of 4 A. This part is suitable only for applications where actual current requirements do not exceed 3 A. The SBR6200CTL-13 offers lower forward voltage (850 mV @ 3 A) due to Super Barrier technology, reducing power dissipation in lower-current applications.

Q: Why is the SDURD820 listed as a substitute if it is a single diode?

A: The SDURD820 is included in the substitute list provided in the input data but does not meet the mandatory diode configuration requirement (1 Pair Common Cathode). The SDURD820 is a single diode device and is not recommended for direct substitution in applications requiring dual-diode array functionality. This part is listed for reference only.

Q: What is the significance of the Obsolete product status for the STTH802CB?

A: Obsolete status indicates that the STTH802CB is no longer in active production and may have limited availability from distributors. Identifying and qualifying substitute parts ensures design continuity and supports ongoing production requirements. The STTH1002CB (Active status) is the recommended replacement to maintain long-term supply chain reliability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed—STTH1002CB, MSRD620CTG, MSRD620CTT4G, SBR6200CTL-13, and SDURD820—are ROHS3 compliant. All parts maintain MSL Level 1 (Unlimited) moisture sensitivity classification, consistent with the STTH802CB.

Q: What is the difference in reverse recovery time between the STTH802CB and its substitutes?

A: The STTH802CB has a reverse recovery time (trr) of 20 ns. The STTH1002CB is 25 ns, MSRD620CTG and MSRD620CTT4G are 55 ns, and SDURD820 is 35 ns. Lower reverse recovery time indicates faster switching characteristics. For applications sensitive to switching speed, the STTH1002CB (25 ns) provides the closest performance match to the original STTH802CB.

Q: Can I use the STTH1002CB in a design originally specified for 4 A if my actual circuit only draws 3 A?

A: Yes. The STTH1002CB is rated for 8 A and is fully capable of handling 3 A operation. Using a higher-rated component in a lower-current application does not create compatibility issues. The device will operate within safe margins with reduced power dissipation relative to its maximum rating.

Q: What packaging formats are available for the substitute parts?

A: The STTH1002CB is supplied in Tube packaging. The MSRD620CTG does not specify packaging format. The MSRD620CTT4G, SBR6200CTL-13, and SDURD820 are supplied in Tape & Reel (TR) format. All parts use the same TO-252-3 DPAK physical package, ensuring PCB footprint compatibility.

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