STTH30S06W Equivalent & Substitute Parts

Part Overview

The STTH30S06W is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 600 V DC reverse voltage and 30 A average rectified current in a DO-247-2 through-hole package. This component is classified as obsolete, indicating that direct procurement from original inventory may become limited. Identifying equivalent and substitute parts ensures design continuity and supply chain reliability for applications requiring 600 V, 30 A fast recovery diode functionality.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	30	A
Voltage - Forward (Vf) (Max) @ If	3.6 @ 30 A	V
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	50 µA @ 600 V	µA
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Mounting Type	Through Hole	—
Package / Case	DO-247-2 (Straight Leads)	—
Operating Temperature - Junction	-40 to 175	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the STTH30S06W is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a maximum DC reverse voltage of 600 V to ensure safe operation within the original circuit design.

Current Rating: The average rectified current must be at or above 30 A. Parts with higher current ratings (37 A, 50 A, 60 A, 77 A) are electrically compatible and provide design margin.

Speed Classification: All substitutes must be classified as fast recovery diodes with reverse recovery time ≤ 500 ns to maintain switching performance and minimize switching losses.

Mounting Type and Package: Through-hole mounting is required. Acceptable packages include DO-247-2, TO-247-2, TO-247AD, and ISOPLUS247™, all of which are through-hole configurations compatible with standard PCB layouts.

Technology: Standard and avalanche technologies are both acceptable, as both support the required voltage and current specifications.

Compliance: RoHS3 compliance is maintained across all substitute options.

Substitutes are grouped into two categories: parametric equivalents (matching 30 A current rating) and similar parts (higher current ratings with compatible electrical characteristics).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [ns]	Ir @ Vr [µA]	Package	Product Status
STTH30S06W	STMicroelectronics	600	30	3.6 @ 30 A	50	50 @ 600 V	DO-247-2	Obsolete
STTH30ST06WY	STMicroelectronics	600	30	3.6 @ 30 A	50	50 @ 600 V	DO-247-2	Active
DSEP30-06A	IXYS	600	30	1.6 @ 30 A	35	250 @ 600 V	TO-247-2	Active
DSEI30-06A	IXYS	600	37	1.6 @ 37 A	50	100 @ 600 V	TO-247-2	Active
DHG20I600HA	IXYS	600	20	2.24 @ 20 A	40	25 @ 600 V	TO-247-2	Active
DSEI60-06A	IXYS	600	60	1.8 @ 70 A	50	200 @ 600 V	TO-247-2	Active
DSEP60-06A	IXYS	600	60	2.04 @ 60 A	35	650 @ 600 V	TO-247-2	Active
DSEI120-06A	IXYS	600	77	1.3 @ 70 A	50	3000 @ 600 V	TO-247-2	Active
DSEP30-06B	IXYS	600	30	2.51 @ 30 A	30	250 @ 600 V	ISOPLUS247™	Active
FFH50US60S	onsemi	600	50	1.54 @ 50 A	124	100 @ 600 V	TO-247-2	Obsolete
RHRG5060	NXP USA Inc.	600	50	2.1 @ 50 A	50	250 @ 600 V	TO-247-2	Active

Engineering Selection Recommendations

Primary Equivalent (Active Status): STTH30ST06WY is the direct parametric equivalent to STTH30S06W, manufactured by STMicroelectronics with identical electrical specifications (600 V, 30 A, 50 ns reverse recovery time). This part is in active production status, ensuring long-term availability. The primary distinction is automotive-grade qualification (AEC-Q101) and improved moisture sensitivity rating (MSL 1), making it suitable for both commercial and automotive applications.

Current-Matched Alternatives (Active Status): DSEP30-06A (IXYS) provides a 30 A current match with improved forward voltage characteristics (1.6 V vs. 3.6 V) and faster reverse recovery time (35 ns vs. 50 ns). This part is in active production and carries HiPerFRED™ technology designation. Package compatibility requires verification for TO-247-2 vs. DO-247-2 footprint differences.

Higher Current Capacity Alternatives (Active Status): DSEI30-06A, DSEI60-06A, DSEP60-06A, and DSEI120-06A provide current ratings of 37 A, 60 A, 60 A, and 77 A respectively, all maintaining 600 V voltage rating and fast recovery characteristics. These parts are suitable for applications where design margin or future current requirement increases are beneficial. All are in active production status.

Avalanche Technology Alternative (Active Status): RHRG5060 (NXP USA Inc.) is a 50 A, 600 V avalanche diode with 50 ns reverse recovery time and active production status. Avalanche technology provides additional reverse voltage transient protection compared to standard rectifier diodes.

Avoid: FFH50US60S (onsemi) is classified as obsolete, presenting the same supply continuity risk as the original STTH30S06W. DHG20I600HA (IXYS) has a 20 A current rating below the 30 A requirement and is not suitable as a direct substitute.

Frequently Asked Questions (FAQ)

Q: Can STTH30ST06WY be used as a direct replacement for STTH30S06W?

A: Yes. STTH30ST06WY is a parametric equivalent with identical voltage (600 V), current (30 A), and reverse recovery time (50 ns) specifications. Both are manufactured by STMicroelectronics and use the DO-247-2 package. The primary difference is product status (active vs. obsolete) and automotive qualification of the substitute.

Q: What is the difference between DO-247-2 and TO-247-2 packages?

A: Both are through-hole packages with identical electrical pin configurations and thermal characteristics. DO-247-2 (Straight Leads) and TO-247-2 are mechanically compatible with standard PCB layouts. Verification of specific PCB footprint requirements is recommended before design implementation.

Q: Can I use DSEP30-06A instead of STTH30S06W?

A: Yes. DSEP30-06A matches the 30 A current requirement and 600 V voltage rating. It offers improved performance characteristics: lower forward voltage (1.6 V vs. 3.6 V) and faster reverse recovery time (35 ns vs. 50 ns). Package compatibility (TO-247-2 vs. DO-247-2) must be verified for your specific PCB design.

Q: Why would I choose a higher current-rated diode like DSEI60-06A?

A: Higher current-rated diodes provide design margin for thermal management and potential future application modifications. DSEI60-06A (60 A) maintains the same 600 V voltage rating and fast recovery characteristics while offering 2× current capacity. This is electrically compatible and suitable for applications where current headroom is beneficial.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain RoHS3 compliance, consistent with the original STTH30S06W specification.

Q: What is the significance of reverse recovery time (trr) in diode selection?

A: Reverse recovery time affects switching speed and switching losses in power conversion circuits. The STTH30S06W specifies 50 ns. Substitutes with equal or faster recovery times (DSEP30-06A at 35 ns, DSEP30-06B at 30 ns) are compatible and may reduce switching losses. Substitutes with slower recovery times (FFH50US60S at 124 ns) may increase switching losses and are not recommended.

Q: Is RHRG5060 suitable as a substitute despite being an avalanche diode?

A: Yes. RHRG5060 is a 50 A, 600 V avalanche diode with 50 ns reverse recovery time and active production status. Avalanche technology provides additional reverse voltage transient protection. It is electrically compatible and suitable for applications requiring enhanced overvoltage protection.

Q: Should I avoid FFH50US60S?

A: Yes. FFH50US60S is classified as obsolete, presenting the same supply continuity concern as the original STTH30S06W. Additionally, its 124 ns reverse recovery time is significantly slower than the original 50 ns specification, which may impact switching performance.

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