UG18DCT-E3/45 Equivalent & Substitute Parts

Part Overview

The UG18DCT-E3/45 is a diode array rectifier manufactured by Vishay General Semiconductor - Diodes Division, configured as a 1 Pair Common Cathode design rated for 200 V DC reverse voltage and 18 A average rectified current per diode. The device is packaged in a Through Hole TO-220-3 case and features fast recovery characteristics with a 30 ns reverse recovery time.

This part is classified as Obsolete, making identification of equivalent and substitute components necessary for ongoing design support, maintenance, and production continuity. Substitute parts listed below maintain compatibility with the original electrical specifications and mechanical form factor while offering active product status from current manufacturers.

Substiute Parts

UG18DCT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 2123UG18DCT-E3/45 Datasheet

Current PartRFQ

BYV32-200G

onsemiIn Stock: 51043BYV32-200G Datasheet

MFR RecommendedRFQ

DPG20C200PB

IXYSIn Stock: 10101DPG20C200PB Datasheet

MFR RecommendedRFQ

MUR1620CTG

onsemiIn Stock: 91230MUR1620CTG Datasheet

MFR RecommendedRFQ

SF1004GHC0G

Taiwan Semiconductor CorporationIn Stock: 975SF1004GHC0G Datasheet

MFR RecommendedRFQ

STTH1602CT

STMicroelectronicsIn Stock: 44259STTH1602CT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UG18DCT-E3/45 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): 200 V (exact match required)
• Diode Configuration: 1 Pair Common Cathode (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: TO-220-3 (exact match required)
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io) (exact match required)

Secondary Compatibility Factors:

• Current - Average Rectified (Io) (per Diode): Substitute parts must equal or exceed 18 A
• Voltage - Forward (Vf) (Max): Substitute parts must not exceed original specification
• Reverse Recovery Time (trr): Substitute parts must not exceed original specification
• Operating Temperature - Junction: Substitute parts must support minimum -65°C to 150°C range
• RoHS Status: ROHS3 Compliant (maintained across all substitutes)

All substitute parts listed below satisfy the primary substitution criteria. Current ratings, forward voltage characteristics, and recovery times are provided for engineering evaluation within the context of specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The UG18DCT-E3/45 is classified as Obsolete. All substitute parts listed—BYV32-200G, DPG20C200PB, MUR1620CTG, and STTH1602CT—are classified as Active products, ensuring ongoing availability and manufacturing support.

Compliance and Certification: All substitute parts maintain ROHS3 compliance and REACH Unaffected status, consistent with the original part. No additional qualification or certification barriers exist for substitution.

Current Rating Consideration: The original UG18DCT-E3/45 is rated for 18 A average rectified current per diode. Substitute parts are rated at 8 A, 10 A, or 10 A respectively. Applications requiring the full 18 A rating per diode must evaluate whether substitute parts with lower current ratings are suitable for the specific circuit topology and thermal management design. Parallel diode configurations or alternative circuit approaches may be necessary for applications with strict 18 A per diode requirements.

Temperature Range: The original part operates from -65°C to 150°C. Substitute parts BYV32-200G, MUR1620CTG, and STTH1602CT extend the upper operating temperature to 175°C, providing enhanced thermal margin. DPG20C200PB operates from -55°C to 175°C, with a reduced lower temperature limit of -55°C compared to the original -65°C specification.

Recovery Time Performance: STTH1602CT offers the fastest reverse recovery time at 26 ns, compared to the original 30 ns. BYV32-200G, DPG20C200PB, and MUR1620CTG all specify 35 ns recovery time, which remains within the fast recovery classification and acceptable for most switching applications.

Frequently Asked Questions (FAQ)

Q: Can BYV32-200G, DPG20C200PB, MUR1620CTG, or STTH1602CT be used as direct replacements for UG18DCT-E3/45?

A: All four substitute parts share the same 200 V reverse voltage rating, 1 Pair Common Cathode configuration, Through Hole mounting, and TO-220-3 package. They are electrically and mechanically compatible. However, the substitute parts are rated for 8 A or 10 A average rectified current per diode, compared to the original 18 A rating. Applications operating at or near the 18 A limit require circuit analysis to confirm suitability.

Q: What is the difference between the substitute parts in terms of current rating?

A: BYV32-200G and MUR1620CTG are rated for 8 A average rectified current per diode. DPG20C200PB and STTH1602CT are rated for 10 A average rectified current per diode. The original UG18DCT-E3/45 is rated for 18 A. Selection depends on the actual current requirements of the application.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use the TO-220-3 Through Hole package, identical to the original UG18DCT-E3/45. No PCB layout modifications are required for mechanical compatibility.

Q: What is the significance of the reverse recovery time (trr) differences?

A: The original UG18DCT-E3/45 specifies 30 ns reverse recovery time. STTH1602CT offers 26 ns, providing faster switching performance. BYV32-200G, DPG20C200PB, and MUR1620CTG specify 35 ns, which is slightly longer but remains within the fast recovery classification. For most applications, this difference is not critical; however, high-frequency switching circuits may benefit from the faster STTH1602CT.

Q: Do all substitute parts meet RoHS compliance?

A: Yes. All substitute parts are ROHS3 Compliant and REACH Unaffected, matching the original part's environmental compliance status.

Q: What is the forward voltage difference between substitute parts?

A: Forward voltage specifications vary across substitute parts. MUR1620CTG specifies 975 mV @ 8 A, the lowest among substitutes. STTH1602CT specifies 1.1 V @ 8 A, matching the original. DPG20C200PB specifies 1.27 V @ 10 A, and BYV32-200G specifies 1.15 V @ 20 A. Lower forward voltage reduces power dissipation in rectifier circuits.

Q: Which substitute part has the lowest reverse leakage current?

A: DPG20C200PB specifies 1 µA @ 200 V reverse leakage, the lowest among all parts. The original UG18DCT-E3/45 specifies 10 µA. Lower reverse leakage is beneficial for applications requiring minimal standby current or high impedance characteristics.

Q: Can I use these substitute parts in automotive applications?

A: SF1004GHC0G, listed in the substitute inventory, is qualified to AEC-Q101 automotive standard and rated for 10 A at 200 V in a TO-220-3 package. However, SF1004GHC0G is a single diode device, not a diode array with common cathode configuration, and therefore is not a direct substitute for the UG18DCT-E3/45 array configuration. BYV32-200G, DPG20C200PB, MUR1620CTG, and STTH1602CT do not carry automotive qualification markings in the provided specifications.

Q: What is the operating temperature range difference?

A: The original UG18DCT-E3/45 operates from -65°C to 150°C. BYV32-200G, MUR1620CTG, and STTH1602CT extend to 175°C maximum junction temperature. DPG20C200PB operates from -55°C to 175°C, with a higher minimum temperature limit. Applications requiring operation below -55°C must use BYV32-200G, MUR1620CTG, or STTH1602CT.