Equivalent & Substitute Parts for UGF8BT-E3/45

Part Overview

The UGF8BT-E3/45 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 100 V DC reverse voltage and 8 A average rectified current. The device features fast recovery characteristics with a 30 ns reverse recovery time and is housed in a TO-220-2 Full Pack isolated tab through-hole package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and procurement needs.

Substiute Parts

UGF8BT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 747UGF8BT-E3/45 Datasheet

Current PartRFQ

STPS10LCD100CFP

STMicroelectronicsIn Stock: 8928STPS10LCD100CFP Datasheet

MFR RecommendedRFQ

STTH802FP

STMicroelectronicsIn Stock: 1454STTH802FP Datasheet

MFR RecommendedRFQ

STTH810FP

STMicroelectronicsIn Stock: 1859STTH810FP Datasheet

MFR RecommendedRFQ

UF801F_T0_00001

Panjit International Inc.In Stock: 896UF801F_T0_00001 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UGF8BT-E3/45 is determined by the following critical parameters: voltage rating (Vr), current capacity (Io), forward voltage drop (Vf), recovery speed characteristics, mounting type, and package configuration. The substitute parts are grouped into two categories based on their relationship to the main part specifications:

Parametric Equivalents maintain identical or superior electrical performance within the same voltage and current class, utilizing the same package type and mounting configuration.

Manufacturer Recommended Substitutes provide functional alternatives that may differ in voltage rating, current capacity per device, or technology type, but remain suitable for applications where the main part specifications are not strictly required.

The following parameters establish substitution validity:

• Voltage - DC Reverse (Vr) (Max): Equal or greater than 100 V
• Current - Average Rectified (Io): Equal to or greater than 8 A per device
• Mounting Type: Through Hole
• Package / Case: TO-220 series configurations
• Technology: Standard or Schottky rectifier diodes
• RoHS Status: ROHS3 Compliant

Parameter Comparison

Engineering Selection Recommendations

UF801F_T0_00001 (Parametric Equivalent - Primary Selection)

The UF801F_T0_00001 manufactured by Panjit International Inc. is a parametric equivalent providing direct functional replacement for the obsolete UGF8BT-E3/45. This part maintains identical voltage rating (100 V), current capacity (8 A), forward voltage drop (1 V @ 8 A), and package configuration (TO-220-2 Full Pack, Isolated Tab). The device is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity level. The reverse recovery time of 50 ns is slightly higher than the original 30 ns specification but remains within fast recovery classification. This part is suitable for direct substitution in existing designs without circuit modification.

STTH802FP (Manufacturer Recommended - Higher Voltage Rating)

The STTH802FP from STMicroelectronics is recommended for applications requiring enhanced voltage margin. This standard rectifier diode maintains the 8 A current rating and identical package type (TO-220-2 Full Pack, Isolated Tab) while providing double the voltage rating at 200 V. The forward voltage drop of 1.05 V @ 8 A is negligibly higher than the original specification. The reverse recovery time matches the original at 30 ns. This part is active in production with ROHS3 compliance and is suitable for designs where higher voltage headroom is beneficial or where the original 100 V rating presents insufficient safety margin.

STTH810FP (Manufacturer Recommended - Ultra-High Voltage Rating)

The STTH810FP from STMicroelectronics provides a high-voltage alternative rated for 1000 V DC reverse voltage while maintaining 8 A current capacity and TO-220-2 Full Pack isolated tab packaging. This part is appropriate for applications requiring significant voltage overstress protection or for use in circuits where voltage transients exceed 100 V. The forward voltage drop increases to 2 V @ 8 A, and reverse recovery time extends to 85 ns. The part is active in production with ROHS3 compliance. Selection of this part should be based on specific circuit voltage requirements, as the increased forward voltage drop will result in higher power dissipation.

STPS10LCD100CFP (Manufacturer Recommended - Schottky Technology)

The STPS10LCD100CFP from STMicroelectronics is a Schottky diode array configured as 1 pair common cathode, rated for 100 V and 5 A per diode. This part differs from the main specification in current capacity (5 A per diode versus 8 A) and package configuration (TO-220-3 Full Pack versus TO-220-2). The Schottky technology provides lower forward voltage drop at 840 mV @ 5 A, resulting in reduced power dissipation. This part is suitable for applications where the 5 A per-diode current rating is sufficient and where the common cathode configuration is compatible with circuit topology. The part is active in production with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the UF801F_T0_00001 be used as a direct replacement for the UGF8BT-E3/45?

A: Yes. The UF801F_T0_00001 is a parametric equivalent with identical voltage rating (100 V), current capacity (8 A), forward voltage drop (1 V @ 8 A), and package configuration (TO-220-2 Full Pack, Isolated Tab). No circuit modifications are required for substitution.

Q: What is the difference between the STTH802FP and STTH810FP?

A: The primary difference is voltage rating. The STTH802FP is rated for 200 V DC reverse voltage, while the STTH810FP is rated for 1000 V. Both maintain 8 A current capacity and identical package type. The STTH810FP exhibits higher forward voltage drop (2 V versus 1.05 V @ 8 A) and longer reverse recovery time (85 ns versus 30 ns). Selection depends on circuit voltage requirements.

Q: Why is the STPS10LCD100CFP listed as a substitute if it has lower current rating?

A: The STPS10LCD100CFP is listed as a manufacturer-recommended alternative for applications where the 5 A per-diode current rating is sufficient. The Schottky technology provides lower forward voltage drop, reducing power dissipation. The common cathode configuration may be advantageous in specific circuit topologies. This part is not suitable for applications requiring the full 8 A capacity.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (UF801F_T0_00001, STTH802FP, STTH810FP, and STPS10LCD100CFP) are ROHS3 compliant and REACH unaffected, matching the compliance status of the original UGF8BT-E3/45.

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

A: Reverse recovery time (trr) affects switching speed and electromagnetic interference characteristics. The original UGF8BT-E3/45 specifies 30 ns. The UF801F_T0_00001 has 50 ns, STTH802FP has 30 ns, and STTH810FP has 85 ns. All remain within fast recovery classification (≤ 500ns). Selection should consider circuit switching frequency and EMI requirements.

Q: Can the STTH810FP be used in place of the UGF8BT-E3/45 in a 100 V circuit?

A: Yes. The STTH810FP is rated for 1000 V, which exceeds the 100 V circuit requirement. However, the forward voltage drop increases to 2 V @ 8 A compared to 1 V for the original part, resulting in approximately double the power dissipation. Thermal design must account for this increase. Use this part only when the higher voltage rating provides specific circuit benefits.

Q: What are the package differences between substitute parts?

A: The UF801F_T0_00001, STTH802FP, and STTH810FP all use TO-220-2 Full Pack with isolated tab, matching the original package. The STPS10LCD100CFP uses TO-220-3 Full Pack, which has three leads instead of two. This configuration difference requires verification of PCB layout compatibility and circuit topology suitability before substitution.

Q: Is the UF801F_T0_00001 available in sufficient quantity for production?

A: According to current inventory data, 843 pieces of UF801F_T0_00001 are available in stock as new original components. Inventory levels should be verified with the supplier for specific procurement requirements.