STTH1302CT Equivalent & Substitute Parts

Part Overview

The STTH1302CT is a general-purpose diode array manufactured by STMicroelectronics, configured as a 1 Pair Common Cathode rectifier rated for 200 V DC reverse voltage and 6.5 A average rectified current per diode. The device is packaged in a Through Hole TO-220-3 configuration and features fast recovery characteristics with a reverse recovery time of 25 ns.

The STTH1302CT is classified as Obsolete. Identification of equivalent and substitute parts is necessary to support ongoing system maintenance, repair, and production continuity where original components are no longer available from primary sources.

Substiute Parts

STTH1302CT

STMicroelectronicsIn Stock: 893STTH1302CT Datasheet

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STTH30R06CW

STMicroelectronicsIn Stock: 267920STTH30R06CW Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the STTH1302CT is determined by the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Diode configuration must be 1 Pair Common Cathode
• Voltage rating must equal or exceed 200 V DC reverse voltage
• Current rating must equal or exceed 6.5 A average rectified current per diode
• Speed classification must be Fast Recovery (≤ 500 ns, > 200 mA)
• Operating temperature range must support 175°C junction temperature maximum

Mechanical Compatibility Criteria:

• Mounting type must be Through Hole
• Package must be compatible with TO-220 series footprints or equivalent mechanical envelopes

The STTH30R06CW meets these substitution criteria with enhanced electrical ratings (600 V, 15 A) and maintains the required 1 Pair Common Cathode configuration, fast recovery speed classification, and 175°C maximum junction temperature. The TO-247-3 package provides mechanical compatibility through standard Through Hole mounting, though physical dimensions differ from the original TO-220-3.

Parameter Comparison

Engineering Selection Recommendations

The STTH30R06CW is an active product from STMicroelectronics and serves as a functional substitute for the obsolete STTH1302CT. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory consistency.

The STTH30R06CW provides superior electrical ratings with 600 V reverse voltage capability and 15 A current capacity, compared to the STTH1302CT specifications of 200 V and 6.5 A. Both devices maintain identical maximum junction temperature (175°C) and fast recovery speed classification. The reverse recovery time of the STTH30R06CW (50 ns) is longer than the STTH1302CT (25 ns), which may affect switching performance in time-critical applications.

The primary mechanical difference is the package transition from TO-220-3 to TO-247-3. Both are Through Hole configurations; however, PCB layout modifications are required to accommodate the different physical dimensions and pin spacing of the TO-247-3 package.

Selection of the STTH30R06CW is appropriate for applications where the original STTH1302CT is no longer procurable and where the enhanced voltage and current ratings do not create design conflicts. Applications operating at or near the original 200 V and 6.5 A specifications will operate within safe margins with the substitute device.

Frequently Asked Questions (FAQ)

Q: Can the STTH30R06CW directly replace the STTH1302CT without PCB modifications?

A: No. While both devices are Through Hole mounted, the STTH30R06CW uses a TO-247-3 package and the STTH1302CT uses a TO-220-3 package. These packages have different physical dimensions and pin spacing. PCB layout modifications are required.

Q: Are the electrical ratings of the STTH30R06CW compatible with circuits designed for the STTH1302CT?

A: Yes. The STTH30R06CW has higher voltage (600 V vs. 200 V) and current (15 A vs. 6.5 A) ratings than the STTH1302CT. Circuits designed for the lower-rated STTH1302CT will operate safely with the STTH30R06CW, as the substitute device can handle the same or greater electrical stress.

Q: What is the significance of the difference in reverse recovery time between these devices?

A: The STTH1302CT has a reverse recovery time of 25 ns, while the STTH30R06CW has 50 ns. In high-frequency switching applications, the longer recovery time of the STTH30R06CW may result in increased switching losses and heat generation. Applications operating at low switching frequencies will not be significantly affected.

Q: Are both devices RoHS compliant?

A: Yes. Both the STTH1302CT and STTH30R06CW are ROHS3 compliant and REACH unaffected, ensuring compatibility with environmental and regulatory requirements.

Q: What is the difference in forward voltage drop between these devices?

A: The STTH1302CT has a maximum forward voltage of 1.1 V at 6.5 A, while the STTH30R06CW has a maximum forward voltage of 2.9 V at 15 A. The higher forward voltage of the STTH30R06CW will result in increased power dissipation in the diode. Thermal management design may require adjustment.

Q: Is the STTH30R06CW currently available?

A: Yes. The STTH30R06CW is classified as an Active product, indicating current manufacturing and availability from STMicroelectronics and authorized distributors.