STTH4R02UY Equivalent & Substitute Parts

Part Overview

The STTH4R02UY is a general-purpose fast recovery rectifier diode manufactured by STMicroelectronics, rated for 200 V DC reverse voltage and 4 A average rectified current in a surface mount SMB (DO-214AA) package. This component is classified as Active product status and is automotive-grade, suitable for power supply and rectification applications requiring fast switching characteristics. Substitute parts are identified based on matching or exceeding the electrical performance parameters while maintaining compatible packaging and thermal specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	4	A
Voltage - Forward (Vf) (Max) @ If	1.05 V @ 4 A	V
Reverse Recovery Time (trr)	30	ns
Current - Reverse Leakage @ Vr	3	µA @ 200 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-40°C ~ 175°C	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the STTH4R02UY is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a DC reverse voltage rating of 200 V or higher to ensure safe operation in the same circuit topology.

Current Rating: The STTH4R02UY is rated for 4 A average rectified current. Substitute parts with equal or higher current ratings (4 A or greater) provide direct replacement capability. Parts with lower current ratings (1 A, 2 A, or 3 A) are listed as partial substitutes for applications where the full 4 A capacity is not required.

Package Compatibility: All substitute parts use the DO-214AA (SMB) surface mount package, ensuring mechanical and thermal compatibility with the original design.

Speed Classification: All substitute parts are classified as fast recovery diodes with reverse recovery time ≤ 500 ns, maintaining switching performance requirements.

Temperature Range: Operating temperature ranges vary among substitutes. The STTH4R02UY operates from -40°C to 175°C. Substitutes with equal or wider temperature ranges provide full compatibility; those with narrower ranges may be suitable for applications within their specified limits.

Compliance: All substitute parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 rating, matching the environmental and regulatory status of the original part.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [ns]	Ir @ Vr [µA]	Tj Range [°C]	Package
STTH4R02UY	STMicroelectronics	200	4	1.05 @ 4A	30	3 @ 200V	-40 ~ 175	DO-214AA, SMB
ER1D-LTP	Micro Commercial Co	200	1	0.95 @ 1A	35	5 @ 200V	-65 ~ 175	DO-214AA, SMB
ER2D-LTP	Micro Commercial Co	200	2	0.95 @ 2A	35	5 @ 200V	-65 ~ 175	DO-214AA, SMB
ER3DB-TP	Micro Commercial Co	200	3	0.95 @ 3A	35	5 @ 200V	-55 ~ 150	DO-214AA, SMB
ES2D	Good-Ark Semiconductor	200	2	0.95 @ 2A	35	10 @ 200V	-55 ~ 150	DO-214AA, SMB
ES2D-13-F	Diodes Incorporated	200	2	0.92 @ 2A	25	5 @ 200V	-55 ~ 150	DO-214AA, SMB
ES3DB-13-F	Diodes Incorporated	200	3	0.90 @ 3A	25	10 @ 200V	-55 ~ 150	DO-214AA, SMB
MURS120	Diodes Incorporated	200	1	0.875 @ 1A	25	2 @ 200V	-55 ~ 150	DO-214AA, SMB
MURS120-13-F	Diodes Incorporated	200	1	0.875 @ 1A	25	2 @ 200V	-55 ~ 175	DO-214AA, SMB
MURS120T3G	onsemi	200	1	0.875 @ 1A	35	2 @ 200V	-65 ~ 175	DO-214AA, SMB
MURS220T3G	onsemi	200	2	0.95 @ 2A	35	2 @ 200V	-65 ~ 175	DO-214AA, SMB

Engineering Selection Recommendations

Direct Replacement (4 A Rating)

No substitute parts with 4 A current rating are provided in the available dataset. Applications requiring the full 4 A capacity of the STTH4R02UY must use the original part number.

Partial Substitutes (3 A Rating)

The ER3DB-TP and ES3DB-13-F are suitable for applications where the circuit load does not exceed 3 A. Both parts maintain the 200 V voltage rating and fast recovery characteristics. The ES3DB-13-F offers improved forward voltage characteristics (0.90 V vs. 0.95 V) and faster reverse recovery time (25 ns vs. 35 ns). However, both parts have a maximum operating temperature of 150°C, which is 25°C lower than the STTH4R02UY. The ER3DB-TP operates from -55°C to 150°C, while the ES3DB-13-F operates from -55°C to 150°C.

Partial Substitutes (2 A Rating)

The ER2D-LTP, ES2D, ES2D-13-F, and MURS220T3G are suitable for applications where the circuit load does not exceed 2 A. The ER2D-LTP provides the widest operating temperature range (-65°C to 175°C) among 2 A options. The ES2D-13-F and MURS220T3G offer superior reverse recovery time (25 ns and 35 ns respectively) and lower reverse leakage current. The MURS220T3G extends the lower temperature limit to -65°C.

Partial Substitutes (1 A Rating)

The ER1D-LTP, MURS120, MURS120-13-F, and MURS120T3G are suitable for applications where the circuit load does not exceed 1 A. The MURS120T3G provides the widest operating temperature range (-65°C to 175°C). The MURS120-13-F maintains the upper temperature limit of 175°C while offering fast recovery characteristics (25 ns).

Compliance and Regulatory Status

All substitute parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental and regulatory compliance of the STTH4R02UY.

Product Status

All substitute parts carry Active product status, indicating current availability and ongoing manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can I use a 3 A rated diode in place of the STTH4R02UY in a 4 A application?

A: No. The 3 A rated substitutes (ER3DB-TP, ES3DB-13-F) are rated for maximum 3 A average rectified current. Using them in a 4 A application exceeds their current rating and may result in component failure or reduced reliability.

Q: What is the difference between the ER3DB-TP and ES3DB-13-F?

A: Both parts are rated for 200 V and 3 A. The ES3DB-13-F has a lower forward voltage drop (0.90 V vs. 0.95 V at rated current) and faster reverse recovery time (25 ns vs. 35 ns). Both operate within -55°C to 150°C temperature range.

Q: Does the MURS120-13-F offer any advantage over the MURS120?

A: The MURS120-13-F extends the upper operating temperature limit to 175°C, matching the STTH4R02UY. Both parts have identical electrical characteristics (1 A rating, 0.875 V forward voltage, 25 ns reverse recovery time).

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts use the DO-214AA (SMB) surface mount package, ensuring mechanical and thermal compatibility with the original design. Packaging options vary between Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) formats.

Q: Which substitute part has the lowest reverse leakage current?

A: The MURS120, MURS120-13-F, MURS120T3G, and MURS220T3G all have reverse leakage current of 2 µA @ 200 V, compared to 3 µA for the STTH4R02UY.

Q: Can I use a substitute part with a narrower temperature range than the STTH4R02UY?

A: Yes, provided your application operates within the substitute part's specified temperature range. The STTH4R02UY operates from -40°C to 175°C. Substitutes with narrower ranges (such as -55°C to 150°C) are suitable for applications that do not require the full temperature span.

Q: What is the significance of reverse recovery time (trr)?

A: Reverse recovery time determines how quickly the diode transitions from conducting to blocking state. The STTH4R02UY has a trr of 30 ns. Substitutes with equal or faster trr (25 ns) provide equivalent or improved switching performance. Substitutes with slower trr (35 ns) may introduce slightly longer switching delays.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the environmental compliance of the STTH4R02UY.

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