STTH30R06D Equivalent & Substitute Parts

Part Overview

The STTH30R06D is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 600 V DC reverse voltage and 30 A average rectified current in a TO-220AC through-hole package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The diode features fast recovery characteristics with a reverse recovery time of 70 ns, suitable for standard rectification applications requiring moderate switching speeds.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	30	A
Voltage - Forward (Vf) (Max) @ If	1.85 @ 30 A	V
Reverse Recovery Time (trr)	70	ns
Current - Reverse Leakage @ Vr	25	µA @ 600 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 STTH30R06D is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 600 V minimum
Current - Average Rectified (Io): 30 A minimum
Mounting Type: Through Hole
Package / Case: TO-220-2 or TO-220AC compatible
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Secondary Compatibility Factors:

Forward voltage (Vf) at rated current
Reverse recovery time (trr)
Reverse leakage current
Operating temperature range
RoHS and REACH compliance status

Substitute parts are grouped into two categories:

Category A - Direct Current Rating Match (30 A): Parts meeting the full 30 A current requirement with 600 V voltage rating and compatible packaging. These provide direct functional replacement without circuit redesign.

Category B - Lower Current Rating (3 A to 6 A): Parts with reduced current ratings but identical voltage rating and package type. These are suitable only for applications where the actual circuit current requirement is lower than the original 30 A specification.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [µA]	Tj (Max) [°C]	Product Status
STTH30R06D	STMicroelectronics	600	30	1.85 @ 30 A	70	25 @ 600 V	175	Obsolete
DSEP29-06A	IXYS	600	30	1.61 @ 30 A	35	250 @ 600 V	175	Active
RURP3060	onsemi	600	30	1.5 @ 30 A	60	250 @ 600 V	175	Active
LXA06T600	Power Integrations	600	6	2.94 @ 6 A	23	250 @ 600 V	150	Active
LQA03TC600	Power Integrations	600	3	3.1 @ 3 A	13	20 @ 600 V	150	Active
QH03TZ600	Power Integrations	600	3	3 @ 3 A	9.8	250 @ 600 V	150	Active

Engineering Selection Recommendations

For Direct Replacement (30 A Applications):

The DSEP29-06A (IXYS HiPerFRED™ series) and RURP3060 (onsemi) are the primary substitutes for the STTH30R06D. Both parts maintain the 30 A current rating and 600 V voltage specification with TO-220-2 packaging. The DSEP29-06A offers improved reverse recovery time (35 ns versus 70 ns) and lower forward voltage (1.61 V versus 1.85 V), resulting in reduced switching losses and heat dissipation. The RURP3060 provides comparable performance with a reverse recovery time of 60 ns and the lowest forward voltage (1.5 V) among 30 A options. Both parts carry Active product status and ROHS3 compliance, ensuring long-term availability and regulatory conformance.

For Current-Limited Applications (≤ 6 A):

The LXA06T600 (Power Integrations Qspeed™ series) is suitable for applications where the actual circuit current does not exceed 6 A. This part provides faster reverse recovery (23 ns) and is classified as Active with RoHS compliance. The LQA03TC600 and QH03TZ600 are applicable only for circuits requiring 3 A or less, offering the fastest reverse recovery times (13 ns and 9.8 ns respectively) among all listed substitutes.

Compliance and Availability:

All substitute parts listed carry RoHS3 or RoHS compliance and REACH Unaffected status, meeting current regulatory requirements. The DSEP29-06A, RURP3060, LXA06T600, LQA03TC600, and QH03TZ600 are all classified as Active products with confirmed inventory availability, providing reliable procurement continuity.

Frequently Asked Questions (FAQ)

Q: Can the DSEP29-06A directly replace the STTH30R06D in all applications?

A: Yes, the DSEP29-06A is a direct replacement for the STTH30R06D. Both parts share identical voltage (600 V) and current (30 A) ratings, use the same TO-220-2 package, and are mounted through-hole. The DSEP29-06A offers superior performance characteristics with lower forward voltage and faster reverse recovery time.

Q: What is the difference between the RURP3060 and DSEP29-06A?

A: Both parts meet the 30 A and 600 V specifications. The RURP3060 has a lower forward voltage (1.5 V versus 1.61 V) but a slower reverse recovery time (60 ns versus 35 ns). Selection depends on whether forward voltage drop or switching speed is the priority in the application.

Q: Can I use the LXA06T600 in place of the STTH30R06D?

A: The LXA06T600 can only be used if the actual circuit current requirement is 6 A or less. The part is rated for 6 A average rectified current, which is insufficient for applications requiring the full 30 A capability of the STTH30R06D. Using an undersized part will result in thermal stress and potential failure.

Q: Are all substitute parts RoHS compliant?

A: Yes, all listed substitute parts carry either ROHS3 or RoHS compliance certification. The STTH30R06D itself is ROHS3 compliant, and all active substitutes maintain this compliance level.

Q: What is the operating temperature range difference between the STTH30R06D and Power Integrations substitutes?

A: The STTH30R06D and DSEP29-06A are rated to 175°C maximum junction temperature. The Power Integrations parts (LXA06T600, LQA03TC600, QH03TZ600) are rated to 150°C maximum. This difference may be relevant for high-temperature applications operating near the upper thermal limit.

Q: Why does the QH03TZ600 have a lower reverse recovery time than the STTH30R06D?

A: The QH03TZ600 is a 3 A part from the Qspeed™ series, which is optimized for faster switching characteristics. Lower current ratings typically allow for faster recovery times due to reduced charge storage. However, this part is only suitable for applications requiring 3 A or less.

Q: Is the STTH30R06D still available for purchase?

A: The STTH30R06D is classified as obsolete. However, 2080 pieces are currently in stock as new original inventory. For long-term procurement, the DSEP29-06A or RURP3060 are recommended as active alternatives with confirmed ongoing availability.

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