STTH2002D Equivalent & Substitute Parts

Part Overview

The STTH2002D is a general-purpose fast recovery rectifier diode manufactured by STMicroelectronics, rated for 200 V DC reverse voltage and 20 A average rectified current in a TO-220AC through-hole package. This part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement needs. Active alternatives with identical or comparable electrical characteristics are available from both the original manufacturer and alternative suppliers.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	20	A
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 20 A
Reverse Recovery Time (trr)	40	ns
Current - Reverse Leakage @ Vr	10	µA @ 200 V
Mounting Type	Through Hole	-
Package / Case	TO-220-2	-
Operating Temperature - Junction (Max)	175	°C
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	-

Substitute Part Grouping Explanation

Substitution of the STTH2002D is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 200 V minimum
Mounting Type: Through Hole
Package / Case: TO-220-2 or TO-220AC compatible
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Technology: Standard rectifier diode

Current Rating Considerations: Substitute parts are grouped into two categories based on average rectified current (Io):

Direct Current Rating Match (20 A): STTH2002DI maintains identical electrical specifications and current handling capacity as the original STTH2002D, with the primary distinction being packaging format (insulated variant).
Reduced Current Rating (10-15 A): DPG10I200PA and DPG15I200PA from IXYS provide lower current ratings but maintain the 200 V voltage specification and fast recovery characteristics. These are suitable for applications where the full 20 A capacity is not required.
Unspecified Current Rating: SDUR2020 from SMC Diode Solutions specifies 200 V voltage rating with forward voltage characteristics at 20 A, though average rectified current is not explicitly provided in the data.

All substitute parts maintain ROHS3 compliance and through-hole TO-220AC packaging compatibility.

Parameter Comparison

Parameter	STTH2002D	STTH2002DI	DPG10I200PA	DPG15I200PA	SDUR2020
Manufacturer	STMicroelectronics	STMicroelectronics	IXYS	IXYS	SMC Diode Solutions
Product Status	Obsolete	Active	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 V	200 V
Current - Average Rectified (Io)	20 A	20 A	10 A	15 A	Not specified
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 20 A	1.1 V @ 20 A	1.27 V @ 10 A	1.26 V @ 15 A	1.15 V @ 20 A
Reverse Recovery Time (trr)	40 ns	40 ns	35 ns	35 ns	35 ns
Current - Reverse Leakage @ Vr	10 µA @ 200 V	10 µA @ 200 V	1 µA @ 200 V	1 µA @ 200 V	15 µA @ 200 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-2	TO-220-2 Insulated	TO-220-2	TO-220-2	TO-220-2
Operating Temperature - Junction (Max)	175°C	175°C	175°C	175°C	150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Affected

Engineering Selection Recommendations

Primary Recommendation: STTH2002DI

The STTH2002DI is the direct equivalent to the obsolete STTH2002D. Both parts are manufactured by STMicroelectronics and share identical electrical specifications: 200 V reverse voltage, 20 A average rectified current, 1.1 V forward voltage at 20 A, and 40 ns reverse recovery time. The STTH2002DI is classified as active product status and maintains full ROHS3 compliance and REACH unaffected status. The primary distinction is packaging format: STTH2002DI is supplied in tube packaging with insulated TO-220AC configuration. This part is the direct replacement for the STTH2002D in all applications requiring the full 20 A current rating.

Secondary Recommendations: DPG15I200PA and DPG10I200PA

The IXYS DPG15I200PA and DPG10I200PA are suitable alternatives for applications where current requirements are 15 A or 10 A respectively. Both parts maintain the 200 V voltage specification, fast recovery characteristics (35 ns trr), and through-hole TO-220AC packaging. These parts feature lower reverse leakage current (1 µA versus 10 µA) and extended operating temperature range (-55°C to 175°C). Selection between these two depends on specific circuit current requirements. Both are active products with ROHS3 compliance.

Alternative Consideration: SDUR2020

The SMC Diode Solutions SDUR2020 provides 200 V voltage rating with 1.15 V forward voltage at 20 A and 35 ns reverse recovery time. However, average rectified current is not explicitly specified in the provided data. This part is active and ROHS3 compliant but carries REACH affected status, which may impose regulatory constraints in certain applications. Selection of this part requires confirmation of current rating adequacy for the intended application.

Compliance Considerations:

All recommended substitute parts maintain ROHS3 compliance. The STTH2002DI and IXYS parts maintain REACH unaffected status, identical to the original STTH2002D. The SDUR2020 carries REACH affected status and should be evaluated against specific regulatory requirements for the end application.

Frequently Asked Questions (FAQ)

Q: Can STTH2002DI be used as a direct replacement for STTH2002D?

A: Yes. The STTH2002DI is electrically identical to the STTH2002D with matching voltage (200 V), current (20 A), forward voltage (1.1 V @ 20 A), and reverse recovery time (40 ns) specifications. The primary difference is packaging format: STTH2002DI is supplied in tube packaging with insulated TO-220AC configuration. Both parts are through-hole mounted in TO-220-2 packages and are mechanically and electrically compatible.

Q: What is the difference between STTH2002D and STTH2002DI?

A: Both parts are manufactured by STMicroelectronics with identical electrical characteristics. The STTH2002D is obsolete, while STTH2002DI is active. The STTH2002DI features an insulated TO-220AC package variant, which provides electrical isolation between the case and the semiconductor junction. This is beneficial in applications requiring case isolation for thermal management or safety considerations.

Q: Can DPG15I200PA or DPG10I200PA be used if my circuit requires 20 A?

A: No. The DPG15I200PA is rated for 15 A average rectified current, and the DPG10I200PA is rated for 10 A. Using these parts in a 20 A application would exceed their current rating and result in excessive heat generation and potential device failure. These parts are suitable only for applications where the circuit current requirement does not exceed their respective ratings.

Q: What are the key differences between the IXYS DPG series and the STMicroelectronics STTH series?

A: Both series maintain 200 V voltage rating and fast recovery characteristics. The IXYS DPG10I200PA and DPG15I200PA feature lower reverse leakage current (1 µA versus 10 µA) and extended operating temperature range (-55°C to 175°C versus 0°C to 175°C for the STTH2002D). However, the IXYS parts have lower current ratings (10 A or 15 A versus 20 A). The STTH2002DI maintains the original 20 A rating with identical leakage and temperature specifications as the STTH2002D.

Q: Is the SDUR2020 a suitable replacement for STTH2002D?

A: The SDUR2020 maintains the 200 V voltage specification and provides 1.15 V forward voltage at 20 A with 35 ns reverse recovery time. However, average rectified current is not explicitly specified in the provided data, creating uncertainty regarding current capacity. Additionally, the SDUR2020 carries REACH affected status, which may impose regulatory constraints. The STTH2002DI is the preferred replacement due to explicit current rating specification and REACH unaffected status.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (STTH2002DI, DPG10I200PA, DPG15I200PA, and SDUR2020) are ROHS3 compliant. However, the SDUR2020 carries REACH affected status, while the other parts maintain REACH unaffected status identical to the original STTH2002D.

Q: What is the significance of reverse recovery time in selecting a substitute?

A: Reverse recovery time (trr) determines how quickly the diode transitions from conducting to blocking state. The STTH2002D specifies 40 ns trr. The STTH2002DI maintains this specification, while the IXYS and SMC alternatives provide 35 ns, which is faster. Faster recovery time reduces switching losses and electromagnetic interference in high-frequency applications. All substitute parts meet or exceed the original specification.

Q: Can I use multiple lower-current parts in parallel to achieve 20 A capacity?

A: Parallel operation of diodes is not addressed in the provided technical parameters and falls outside the scope of this substitution analysis. Parallel diode configurations require additional design considerations including current sharing, thermal management, and reverse voltage distribution that are not covered in the provided data.

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