STTH8006W Equivalent & Substitute Parts

Part Overview

The STTH8006W is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 600 V DC reverse voltage and 80 A average rectified current in a DO-247 through-hole package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating package variations.

Substiute Parts

STTH8006W

STMicroelectronicsIn Stock: 3073STTH8006W Datasheet

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APT30D60BG

Microchip TechnologyIn Stock: 109521APT30D60BG Datasheet

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DHG20I600HA

IXYSIn Stock: 826DHG20I600HA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the STTH8006W is constrained by the following critical parameters:

Voltage Compatibility: All substitute parts must maintain a DC reverse voltage rating of 600 V or greater to ensure safe operation within the original circuit design envelope.

Current Rating: The STTH8006W carries 80 A average rectified current. Substitute parts with lower current ratings (such as 30 A or 20 A devices) operate at reduced current capacity and are suitable only for applications where circuit current requirements do not exceed the substitute part's rating.

Package and Mounting: The original part uses DO-247-2 through-hole packaging. Substitute parts may use equivalent through-hole packages (TO-247-2, TO-247 [B]) that maintain mechanical and electrical compatibility with existing PCB layouts and thermal management systems.

Recovery Characteristics: All identified substitutes maintain fast recovery classification (≤ 500ns, > 200mA), ensuring compatibility with switching applications and transient response requirements.

Compliance and Status: Substitute parts must maintain ROHS3 compliance and active product status to ensure long-term availability and regulatory conformance.

Parameter Comparison

Engineering Selection Recommendations

APT30D60BG (Microchip Technology): This part is suitable for applications where the circuit current requirement does not exceed 30 A. The device maintains 600 V voltage rating, fast recovery characteristics, and ROHS3 compliance. Operating temperature range extends to 175°C, matching the original specification. Active product status ensures long-term availability. The TO-247-2 package is mechanically compatible with DO-247-2 mounting footprints.

DHG20I600HA (IXYS): This part is suitable for applications where the circuit current requirement does not exceed 20 A. The device maintains 600 V voltage rating and fast recovery characteristics with ROHS3 compliance. Operating temperature maximum is 150°C, which is 25°C lower than the original part. Active product status ensures availability. The TO-247-2 package is mechanically compatible with DO-247-2 mounting footprints. Reverse recovery time of 40 ns provides superior switching performance compared to the original 105 ns specification.

Both substitute parts are active products with established supply chains, addressing the obsolescence status of the STTH8006W. Selection between substitutes depends on circuit current requirements and thermal operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the APT30D60BG or DHG20I600HA be used as direct replacements for the STTH8006W?

A: Direct replacement is possible only if the circuit current requirement does not exceed the substitute part's rating. The APT30D60BG is rated for 30 A maximum, and the DHG20I600HA is rated for 20 A maximum. If the original circuit requires the full 80 A capacity of the STTH8006W, these substitutes are not suitable. Both maintain the 600 V voltage rating and fast recovery characteristics required for compatibility.

Q: Are the TO-247-2 packages of the substitute parts compatible with the DO-247-2 footprint of the original part?

A: TO-247-2 and DO-247-2 are mechanically compatible through-hole packages with equivalent lead spacing and mounting requirements. PCB layout modifications are not required for package substitution.

Q: What is the impact of different forward voltage specifications on circuit performance?

A: Forward voltage varies with current rating. The STTH8006W specifies 1.6 V at 80 A, the APT30D60BG specifies 1.8 V at 30 A, and the DHG20I600HA specifies 2.24 V at 20 A. These values are measured at their respective rated currents and reflect device characteristics at those operating points. Direct comparison requires evaluation at equivalent current levels within each device's operating range.

Q: How do reverse recovery time differences affect circuit design?

A: Reverse recovery time (trr) affects switching transients and electromagnetic interference characteristics. The DHG20I600HA exhibits 40 ns trr compared to the STTH8006W at 105 ns, indicating faster switching behavior. The APT30D60BG at 85 ns provides intermediate performance. All three devices meet the fast recovery classification (≤ 500ns, > 200mA), ensuring compatibility with standard switching applications.

Q: What is the significance of reverse leakage current differences?

A: Reverse leakage current is measured at maximum rated voltage. The STTH8006W specifies 50 µA at 600 V, the APT30D60BG specifies 250 µA at 600 V, and the DHG20I600HA specifies 25 µA at 600 V. Higher leakage current increases power dissipation in reverse bias conditions. The DHG20I600HA exhibits the lowest leakage, while the APT30D60BG exhibits higher leakage. Circuit design must account for these differences in thermal and power budget calculations.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both the APT30D60BG and DHG20I600HA are ROHS3 compliant, matching the compliance status of the original STTH8006W. Both parts also maintain MSL 1 (Unlimited) moisture sensitivity classification.

Q: What is the availability status of the substitute parts?

A: Both substitute parts are classified as active products. The APT30D60BG has 109,480 pieces in stock, and the DHG20I600HA has 803 pieces in stock, indicating established supply availability compared to the obsolete STTH8006W.