STTH1R02 Equivalent & Substitute Parts

Part Overview

The STTH1R02 is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 200 V DC reverse voltage and 1.5 A average rectified current in a through-hole DO-41 package. This component is classified as Active product status and features fast recovery characteristics with a reverse recovery time of 30 ns. Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design flexibility permits selection from alternative manufacturers while maintaining electrical and mechanical compatibility within specified parameters.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1	V @ 1.5 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	-
Reverse Recovery Time (trr)	30	ns
Current - Reverse Leakage @ Vr	3	µA @ 200 V
Mounting Type	Through Hole	-
Package / Case	DO-204AL, DO-41, Axial	-
Operating Temperature - Junction (Max)	175	°C
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the STTH1R02 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 200 V
Mounting Type: Must be Through Hole
Package / Case: Must support DO-204AL, DO-41, or Axial configurations
RoHS Status: Must maintain ROHS3 Compliance

Secondary Compatibility Factors:

Current - Average Rectified (Io): Substitute parts rated at 1 A are acceptable for applications where the circuit design permits reduced current capacity
Voltage - Forward (Vf): Variations within ±100 mV are acceptable based on circuit design tolerance
Speed Classification: Both Fast Recovery and Standard Recovery types are listed as substitutes; selection depends on application switching frequency requirements
Operating Temperature Range: Substitute parts must support the maximum junction temperature of 175°C or higher

The three substitute parts (EGP10D, 1N4003G, 1N4003RLG) meet the primary substitution criteria. All three maintain 200 V reverse voltage rating, through-hole mounting, and DO-41 package compatibility. Current ratings of 1 A represent a reduction from the primary part's 1.5 A specification and are acceptable only in applications where circuit design accommodates this lower rating.

Parameter Comparison

Parameter	STTH1R02 (Main)	EGP10D	1N4003G	1N4003RLG
Manufacturer	STMicroelectronics	Fairchild Semiconductor	Taiwan Semiconductor Corporation	onsemi
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 V
Current - Average Rectified (Io)	1.5 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 1.5 A	950 mV @ 1 A	1 V @ 1 A	1.1 V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)
Reverse Recovery Time (trr)	30 ns	50 ns	-	-
Current - Reverse Leakage @ Vr	3 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	10 µA @ 200 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
Operating Temperature - Junction (Max)	175°C	150°C	150°C	175°C
Product Status	Active	Active	Active	Not For New Designs
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

EGP10D (Fairchild Semiconductor): This substitute maintains Active product status and provides fast recovery characteristics matching the primary part's speed classification. The 50 ns reverse recovery time exceeds the STTH1R02's 30 ns specification but remains within fast recovery parameters. Operating temperature maximum of 150°C is 25°C lower than the primary part. Selection of EGP10D is appropriate for applications where the reduced current rating of 1 A is acceptable and operating junction temperatures remain below 150°C.

1N4003G (Taiwan Semiconductor Corporation): This substitute maintains Active product status and ROHS3 compliance. It features Standard Recovery speed classification, which differs from the primary part's Fast Recovery characteristics. The 1 A current rating requires circuit design verification. Operating temperature maximum of 150°C is 25°C lower than the primary part. Selection of 1N4003G is appropriate for low-frequency rectification applications where switching speed is not a critical parameter and operating temperatures remain below 150°C.

1N4003RLG (onsemi): This substitute carries Not For New Designs product status, indicating it is in mature or declining production phase. It maintains ROHS3 compliance and supports the full 175°C operating temperature range of the primary part. Standard Recovery speed classification and 10 µA reverse leakage current represent departures from the primary part's specifications. Selection of 1N4003RLG is restricted to legacy system maintenance or applications where new design qualification is not required.

Primary Selection Priority: For new designs requiring direct substitution with minimal circuit redesign, EGP10D is the preferred alternative, provided operating temperatures remain below 150°C and the 1 A current rating is acceptable. For applications requiring the full 175°C operating temperature range in new designs, no suitable substitute exists among the provided alternatives.

Frequently Asked Questions (FAQ)

Q: Can the STTH1R02 be directly replaced with a 1 A rated substitute in all applications?

A: No. Substitutes rated at 1 A average rectified current are acceptable only in applications where the circuit design permits operation at this reduced current level. The primary part is rated for 1.5 A. Circuit analysis must confirm that peak and average current demands do not exceed 1 A before substitution.

Q: What is the difference between Fast Recovery and Standard Recovery diodes, and does it affect substitution?

A: Fast Recovery diodes (≤ 500 ns reverse recovery time) are designed for high-frequency switching applications and exhibit faster turn-off characteristics. Standard Recovery diodes (> 500 ns) are suitable for low-frequency rectification. The STTH1R02 is Fast Recovery. Substitution with Standard Recovery types (1N4003G, 1N4003RLG) is acceptable only in applications where switching frequency does not require fast recovery performance.

Q: Why is the 1N4003RLG marked as "Not For New Designs"?

A: This designation indicates the component is in mature production phase and may have limited availability or planned discontinuation. While it remains functionally compatible, it is not recommended for new product development. Use of this part should be restricted to legacy system support or maintenance applications.

Q: Are all substitute parts available in the same DO-41 package configuration?

A: All substitute parts support DO-204AL, DO-41, and Axial package configurations. However, specific supplier device packages vary. EGP10D and 1N4003G are supplied in DO-204AL (DO-41) configuration. 1N4003RLG is supplied in Axial configuration. Verify the specific package variant required for your application before procurement.

Q: What is the impact of the 25°C lower operating temperature maximum on EGP10D and 1N4003G?

A: These substitutes are rated to 150°C maximum junction temperature, compared to the primary part's 175°C. In applications where the circuit design results in junction temperatures approaching or exceeding 150°C, these substitutes are not suitable. Thermal analysis of the application is required to confirm compatibility.

Q: Can forward voltage differences between substitutes affect circuit performance?

A: Forward voltage variations of 50 mV to 150 mV exist among the substitute parts. In precision rectification circuits or those with tight voltage regulation requirements, these differences may affect performance. In general-purpose rectification applications with adequate voltage margin, these variations are typically acceptable. Circuit design review is necessary to confirm compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: EGP10D RoHS status is not specified in the provided data. 1N4003G and 1N4003RLG are both ROHS3 compliant. If RoHS3 compliance is a requirement for your application, EGP10D must be verified with the manufacturer before selection.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message