STTH8003CY Equivalent & Substitute Parts

Part Overview

The STTH8003CY is a fast recovery diode array manufactured by STMicroelectronics, configured as 1 pair common cathode with 300 V reverse voltage rating and 40 A average rectified current per diode. The device is packaged in TO-247-3 through-hole format and qualified to AEC-Q101 automotive standards. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. Substitute parts listed maintain the same electrical specifications and mechanical compatibility while offering active product status from alternative manufacturers.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Voltage - DC Reverse (Vr) (Max)	300	V
Current - Average Rectified (Io) (per Diode)	40	A
Voltage - Forward (Vf) (Max) @ If	1.25 @ 40	V @ A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	60	ns
Current - Reverse Leakage @ Vr	80 µA @ 300 V	—
Operating Temperature - Junction (Max)	175	°C
Mounting Type	Through Hole	—
Package / Case	TO-247-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the STTH8003CY is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Diode configuration: 1 pair common cathode
Voltage rating: 300 V DC reverse (Vr) maximum
Current rating: 40 A average rectified current per diode
Speed classification: Fast recovery ≤ 500 ns
Mounting type: Through hole
RoHS3 compliance and MSL 1 rating

Package Compatibility: Substitute parts must use either TO-247-3 or equivalent mechanical footprint (TO-247AD supplier designation). Parts with different package types (TO-3P-3, SC-65-3, ISOPLUS247™) are listed for reference but require PCB layout modification.

Current Rating Considerations: Substitute parts with current ratings of 30 A, 40 A, or 60 A are included. Parts rated at 30 A (DPG30C300HB, DPG60C300HB, DPG60C300HJ, DPG60C300QB) operate within the 40 A specification and are suitable for applications not requiring the full 40 A capacity. The 60 A rated part (DPG120C300QB) exceeds the original specification and provides additional thermal margin.

Reverse Recovery Time: Substitute parts from IXYS (DPG series) feature 35 ns reverse recovery time, which is superior to the original 60 ns specification, providing improved switching performance.

Parameter Comparison

Parameter	STTH8003CY	DPG30C300HB	DPG60C300HB	DPG60C300HJ	DPG60C300QB	DPG80C300HB	DPG120C300QB
Manufacturer	STMicroelectronics	IXYS	IXYS	IXYS	IXYS	IXYS	IXYS
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Voltage - DC Reverse (Vr) (Max)	300 V	300 V	300 V	300 V	300 V	300 V	300 V
Current - Average Rectified (Io) (per Diode)	40 A	15 A	30 A	30 A	30 A	40 A	60 A
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 40 A	1.25 V @ 15 A	1.34 V @ 30 A	1.26 V @ 30 A	1.34 V @ 30 A	1.36 V @ 40 A	1.4 V @ 60 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	60 ns	35 ns	35 ns	35 ns	35 ns	35 ns	35 ns
Current - Reverse Leakage @ Vr	80 µA @ 300 V	1 µA @ 300 V	1 µA @ 300 V	1 µA @ 300 V	1 µA @ 300 V	1 µA @ 300 V	1 µA @ 300 V
Operating Temperature - Junction	175°C (Max)	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-247-3	TO-247-3	TO-247-3	TO-247-3	TO-3P-3, SC-65-3	TO-247-3	TO-3P-3, SC-65-3
Supplier Device Package	MAX247™	TO-247AD	TO-247AD	ISOPLUS247™	TO-3P	TO-247AD	TO-3P
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	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)	1 (Unlimited)

Engineering Selection Recommendations

Direct Equivalent (Same Current Rating): DPG80C300HB is the direct equivalent to STTH8003CY, maintaining the 40 A current rating with identical 300 V reverse voltage specification. Both parts use TO-247-3 package format. DPG80C300HB is active product status with ROHS3 compliance and MSL 1 rating. The reverse recovery time of 35 ns provides improved switching performance compared to the original 60 ns specification.

Lower Current Rating Alternatives: DPG30C300HB (15 A), DPG60C300HB (30 A), and DPG60C300HJ (30 A) are suitable for applications where the full 40 A capacity is not required. These parts maintain 300 V voltage rating and TO-247-3 package compatibility. All are active product status with ROHS3 compliance. DPG60C300HJ uses ISOPLUS247™ package designation but maintains TO-247-3 mechanical footprint.

Higher Current Rating Alternative: DPG120C300QB provides 60 A current capacity with 300 V voltage rating. This part uses TO-3P-3 package (SC-65-3 mechanical format), requiring PCB layout modification. DPG120C300QB is active product status with ROHS3 compliance and superior reverse recovery time of 35 ns.

Package Consideration: DPG60C300QB and DPG120C300QB use TO-3P package format, which differs mechanically from the TO-247-3 original. These parts are suitable only for new designs or applications where PCB layout can accommodate TO-3P footprint.

Compliance Status: All substitute parts maintain ROHS3 compliance and MSL 1 (unlimited moisture sensitivity) rating, matching the original STTH8003CY environmental specifications. All parts are REACH unaffected and classified under ECCN EAR99.

Frequently Asked Questions (FAQ)

Q: Can DPG80C300HB directly replace STTH8003CY without PCB modification? A: Yes. DPG80C300HB uses TO-247-3 package identical to STTH8003CY. Both parts have the same 40 A current rating and 300 V voltage specification. No PCB layout changes are required.

Q: What is the difference between DPG60C300HB and DPG60C300HJ? A: Both parts have identical electrical specifications (30 A, 300 V). DPG60C300HB uses TO-247AD supplier designation, while DPG60C300HJ uses ISOPLUS247™ designation. Both maintain TO-247-3 mechanical footprint compatibility. DPG60C300HJ is from the HiPerFRED™ series, while DPG60C300HB is from HiPerFRED²™ series.

Q: Can I use DPG30C300HB (15 A) in place of STTH8003CY (40 A)? A: DPG30C300HB is electrically compatible but rated for only 15 A average rectified current. Use this part only if your application current requirement does not exceed 15 A. The 300 V voltage rating and fast recovery speed are maintained.

Q: Why do DPG60C300QB and DPG120C300QB have different package types? A: DPG60C300QB and DPG120C300QB use TO-3P-3 package (SC-65-3 mechanical format) instead of TO-247-3. This package type requires different PCB footprint and mounting hole pattern. These parts are suitable for new designs where PCB layout can accommodate TO-3P format.

Q: What is the advantage of the 35 ns reverse recovery time in IXYS parts compared to the original 60 ns? A: Faster reverse recovery time (35 ns versus 60 ns) reduces switching losses and improves overall circuit efficiency. This is a performance enhancement in all IXYS substitute parts.

Q: Are all substitute parts automotive qualified? A: The original STTH8003CY carries AEC-Q101 automotive qualification. Substitute parts from IXYS do not list AEC-Q101 qualification in the provided specifications. Verify automotive qualification requirements with the manufacturer if this is a critical application parameter.

Q: What is the difference in reverse leakage current between STTH8003CY and substitute parts? A: STTH8003CY specifies 80 µA reverse leakage at 300 V. All IXYS substitute parts specify 1 µA reverse leakage at 300 V. This represents significantly lower leakage current in substitute parts, which is beneficial for circuit performance.

Q: Can DPG120C300QB (60 A) be used in applications designed for 40 A? A: Yes. DPG120C300QB exceeds the 40 A specification with 60 A rating. The higher current capacity provides additional thermal margin and design flexibility. However, the TO-3P package requires PCB layout modification.

Q: Are all parts RoHS3 compliant? A: Yes. STTH8003CY and all listed substitute parts are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity level.

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