20ETS12STRL Equivalent & Substitute Parts

Part Overview

The 20ETS12STRL is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 1200 V DC reverse voltage and 20 A average rectified current in a surface mount TO-263AB (D2PAK) package. This part is classified as obsolete, indicating it is no longer in active production. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing manufacturing or repair operations for applications utilizing this diode specification.

Substiute Parts

20ETS12STRL

Vishay General Semiconductor - Diodes DivisionIn Stock: 86420ETS12STRL Datasheet

Current PartRFQ

STTH1512G

STMicroelectronicsIn Stock: 1751STTH1512G Datasheet

MFR RecommendedRFQ

STTH1512G-TR

STMicroelectronicsIn Stock: 34279STTH1512G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 20ETS12STRL are identified based on the following critical electrical and mechanical parameters:

Voltage Rating Compatibility: Both substitute parts maintain the 1200 V DC reverse voltage specification, ensuring equivalent voltage stress capability in the application circuit.

Package Compatibility: Both substitute parts utilize the TO-263-3 D2PAK surface mount package, providing identical mechanical fit and PCB layout compatibility.

Current Rating Consideration: The substitute parts are rated for 15 A average rectified current, which is lower than the original 20 A specification. This represents a design trade-off and requires circuit-level evaluation to confirm suitability for the intended application.

Recovery Characteristics: The substitute parts feature fast recovery characteristics (≤500ns) compared to the standard recovery (>500ns) of the original part, representing an improvement in switching performance.

Reverse Leakage: The substitute parts exhibit lower reverse leakage current (15 µA @ 1200 V) compared to the original specification (100 µA @ 1200 V), indicating superior blocking characteristics.

Compliance Status: The substitute parts are RoHS3 compliant and carry active product status, ensuring long-term availability and regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

STTH1512G and STTH1512G-TR are functionally equivalent substitutes for the 20ETS12STRL within the constraints of the provided specifications. Both substitute parts are manufactured by STMicroelectronics and carry active product status, ensuring continued availability and manufacturing support.

Compliance Advantage: The substitute parts are ROHS3 compliant, whereas the original 20ETS12STRL is RoHS non-compliant. This compliance status is significant for applications subject to regulatory requirements in markets enforcing RoHS directives.

Packaging Options: STTH1512G is supplied in tube packaging, while STTH1512G-TR is supplied in cut tape and Digi-Reel format. Selection between these two variants depends on procurement volume and assembly line requirements.

Current Rating Limitation: The 15 A rating of the substitute parts is lower than the original 20 A specification. Circuit designs operating at or near the 20 A limit of the original part require thermal and electrical analysis to confirm the substitute parts operate within acceptable margins.

Temperature Performance: The substitute parts support a maximum junction temperature of 175°C compared to 150°C for the original part, providing improved thermal headroom in high-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can STTH1512G or STTH1512G-TR be used as direct replacements for 20ETS12STRL?

A: Both substitute parts share identical voltage ratings (1200 V), package type (TO-263AB D2PAK), and mounting configuration (surface mount). However, the 15 A current rating is lower than the original 20 A specification. Direct substitution is valid only when circuit current requirements do not exceed 15 A.

Q: What is the difference between STTH1512G and STTH1512G-TR?

A: Both parts are electrically identical. The difference is packaging format: STTH1512G is supplied in tube packaging, while STTH1512G-TR is supplied in cut tape and Digi-Reel format. Selection depends on procurement volume and assembly automation requirements.

Q: Why does the substitute part have higher forward voltage (2.1 V vs. 1.1 V)?

A: Forward voltage is measured at different current levels. The original part specifies 1.1 V @ 20 A, while the substitute specifies 2.1 V @ 15 A. Direct comparison is not valid due to different measurement conditions. At equivalent current levels, forward voltage characteristics may differ based on semiconductor technology and design.

Q: Are there any compliance or regulatory differences?

A: Yes. The 20ETS12STRL is RoHS non-compliant, while both STTH1512G and STTH1512G-TR are ROHS3 compliant. Applications subject to RoHS regulations benefit from the substitute parts' compliance status.

Q: What is the significance of the faster recovery time in the substitute parts?

A: The substitute parts feature fast recovery (≤500ns, 105 ns trr) compared to standard recovery (>500ns) in the original part. Faster recovery reduces switching losses and improves efficiency in high-frequency switching applications, though this benefit is only realized if the circuit design exploits these characteristics.

Q: Can I use the substitute parts in existing PCB designs without modification?

A: Yes. Both substitute parts use the identical TO-263AB D2PAK package with the same pinout and mechanical dimensions as the original part. No PCB layout modifications are required for mechanical compatibility.

Q: What is the impact of lower reverse leakage current in the substitute parts?

A: Lower reverse leakage (15 µA vs. 100 µA @ 1200 V) indicates superior blocking characteristics and reduced standby power dissipation. This is a performance improvement with no negative impact on circuit operation.