UFS380J/TR13 Equivalent & Substitute Parts

Part Overview

The UFS380J/TR13 is a general-purpose rectifier diode manufactured by Microchip Technology, rated for 800 V DC reverse voltage and 3 A average rectified current in a surface-mount DO-214AB (SMC) package. This component is classified as Active product status and is RoHS non-compliant. Equivalent and substitute parts are identified based on matching or exceeding electrical specifications within the same package category, enabling direct replacement in circuit designs where voltage and current ratings are compatible.

Key Parameters

Parameter	UFS380J/TR13 Specification
Voltage - DC Reverse (Vr) (Max)	800 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 3 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	60 ns
Current - Reverse Leakage @ Vr	10 µA @ 800 V
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 175°C
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the UFS380J/TR13 are categorized based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Equal to or greater than 800 V
Current - Average Rectified (Io): Equal to or greater than 3 A
Package / Case: DO-214AB, SMC (surface-mount compatibility)
Mounting Type: Surface Mount

Secondary Compatibility Factors:

Forward voltage (Vf) at rated current
Reverse recovery time (trr) and speed classification
Reverse leakage current
Operating temperature range
RoHS and regulatory compliance status

Parts are grouped into two categories:

Direct Equivalents (800 V, 3 A): Parts with identical voltage and current ratings, enabling one-to-one replacement with minimal circuit impact.

Higher-Rated Substitutes (1000 V or 6 A): Parts exceeding the original specifications in voltage or current capacity. These provide enhanced performance margins and are electrically compatible in applications where the circuit design permits higher-rated components.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf @ If	Speed	trr	Ir @ Vr	Tj (Operating)	RoHS Status
UFS380J/TR13	Microchip Technology	800 V	3 A	1.2 V @ 3 A	Fast Recovery ≤ 500ns	60 ns	10 µA @ 800 V	-55°C ~ 175°C	RoHS non-compliant
S3K-TP	Micro Commercial Co	800 V	3 A	1.2 V @ 3 A	Standard Recovery >500ns	—	10 µA @ 800 V	-55°C ~ 150°C	ROHS3 Compliant
S3K	Diotec Semiconductor	800 V	3 A	1.15 V @ 3 A	Standard Recovery >500ns	1.5 µs	5 µA @ 800 V	-50°C ~ 150°C	ROHS3 Compliant
S3K-13-F	Diodes Incorporated	800 V	3 A	1.15 V @ 3 A	Standard Recovery >500ns	—	10 µA @ 800 V	-65°C ~ 150°C	ROHS3 Compliant
RS3M-13-F	Diodes Incorporated	1000 V	3 A	1.3 V @ 3 A	Fast Recovery ≤ 500ns	500 ns	5 µA @ 1000 V	-65°C ~ 150°C	ROHS3 Compliant
S3M	Diotec Semiconductor	1000 V	3 A	1.15 V @ 3 A	Standard Recovery >500ns	1.5 µs	5 µA @ 1000 V	-50°C ~ 150°C	Not applicable
S3M-TP	Micro Commercial Co	1000 V	3 A	1.2 V @ 3 A	Standard Recovery >500ns	—	10 µA @ 1000 V	-55°C ~ 150°C	ROHS3 Compliant
STTH310S	STMicroelectronics	1000 V	3 A	1.7 V @ 3 A	Fast Recovery ≤ 500ns	75 ns	10 µA @ 1000 V	-40°C ~ 175°C	ROHS3 Compliant
SMLJ60S10-TP	Micro Commercial Co	1000 V	6 A	1 V @ 6 A	Standard Recovery >500ns	—	5 µA @ 1000 V	-55°C ~ 150°C	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent Selection (800 V, 3 A Rating):

S3K-TP (Micro Commercial Co) provides the closest electrical match to UFS380J/TR13 with identical voltage and current ratings. This part is ROHS3 compliant and maintains the same forward voltage specification. The primary difference is recovery speed classification (Standard vs. Fast Recovery), which does not prevent substitution in general-purpose rectification applications. Operating temperature range is -55°C to 150°C, which is 25°C lower than the original part.

S3K (Diotec Semiconductor) and S3K-13-F (Diodes Incorporated) are alternative 800 V, 3 A options with ROHS3 compliance. Both exhibit lower forward voltage (1.15 V) and reduced reverse leakage current (5 µA), offering improved efficiency. S3K-13-F supports an extended lower temperature range (-65°C) compared to the original specification.

Higher-Rated Substitutes (1000 V or 6 A):

S3M-TP (Micro Commercial Co) and S3M (Diotec Semiconductor) provide 1000 V voltage rating with 3 A current capacity. These parts are suitable for applications where increased voltage margin is required. S3M-TP is ROHS3 compliant with -55°C to 150°C operating range.

RS3M-13-F (Diodes Incorporated) offers 1000 V, 3 A with Fast Recovery characteristics matching the original part's speed classification. This part is ROHS3 compliant and supports -65°C to 150°C operating temperature.

STTH310S (STMicroelectronics) provides 1000 V, 3 A with Fast Recovery and 75 ns reverse recovery time. This part is ROHS3 compliant and supports the widest operating temperature range (-40°C to 175°C), matching the original part's upper temperature limit.

SMLJ60S10-TP (Micro Commercial Co) is rated for 1000 V, 6 A, providing both voltage and current margin. This part is suitable only for applications where the circuit design accommodates the higher current rating. ROHS3 compliant with -55°C to 150°C operating range.

Compliance Considerations:

The original UFS380J/TR13 is RoHS non-compliant. All listed substitute parts except S3M are ROHS3 compliant, enabling use in applications requiring RoHS compliance. Selection should account for regulatory requirements in the target application.

Frequently Asked Questions (FAQ)

Q: Can S3K-TP directly replace UFS380J/TR13 without circuit modification?

A: Yes. S3K-TP matches the 800 V voltage and 3 A current ratings of UFS380J/TR13 and uses the same DO-214AB SMC package. The primary difference is recovery speed classification (Standard vs. Fast Recovery). In general-purpose rectification circuits, this difference does not prevent direct substitution. Operating temperature range is reduced to 150°C maximum; verify this is acceptable for your application.

Q: What is the difference between Fast Recovery and Standard Recovery diodes?

A: Fast Recovery diodes have reverse recovery time ≤ 500 ns, while Standard Recovery diodes exceed 500 ns. Fast Recovery diodes reduce switching losses in high-frequency applications. For low-frequency or DC rectification, Standard Recovery diodes are functionally equivalent. UFS380J/TR13 is classified as Fast Recovery (60 ns trr), while S3K-TP is Standard Recovery. Both are suitable for general-purpose applications.

Q: Can I use a 1000 V rated diode (such as S3M-TP or RS3M-13-F) in place of the 800 V UFS380J/TR13?

A: Yes. Higher voltage-rated diodes are electrically compatible in circuits designed for 800 V operation. The 1000 V rating provides additional voltage margin and does not degrade circuit performance. This substitution is valid provided the current rating (3 A minimum) is maintained and the package remains DO-214AB SMC.

Q: Why would I choose SMLJ60S10-TP (6 A) over a 3 A substitute?

A: SMLJ60S10-TP is suitable only if your circuit design permits a higher current-rated component and requires the additional current capacity. The 6 A rating does not provide benefit in applications limited to 3 A operation. Use this part only when circuit requirements explicitly call for 6 A capability.

Q: Are all substitute parts available in Tape & Reel (TR) packaging?

A: No. Packaging varies by manufacturer and part number. S3K-TP, S3M-TP, SMLJ60S10-TP, and S3K-13-F are supplied in Tape & Reel. S3K is supplied without specified packaging. STTH310S is supplied in Cut Tape (CT) & Digi-Reel®. S3M is supplied in Cut Tape (CT) & Digi-Reel®. Verify packaging compatibility with your assembly process before selection.

Q: What is the impact of forward voltage differences between substitute parts?

A: Forward voltage (Vf) affects power dissipation and voltage drop across the diode. UFS380J/TR13 specifies 1.2 V @ 3 A. Substitutes range from 1.0 V to 1.7 V @ 3 A. Lower Vf reduces power loss; higher Vf increases power dissipation. For general-purpose rectification, these differences are typically acceptable. For precision applications or high-current designs, calculate power dissipation to confirm thermal management is adequate.

Q: Is RoHS compliance important for my application?

A: RoHS compliance is mandatory in many regulated markets and industries. UFS380J/TR13 is RoHS non-compliant. All substitute parts except S3M are ROHS3 compliant. If your application or end market requires RoHS compliance, select from S3K-TP, S3K, S3K-13-F, S3M-TP, RS3M-13-F, STTH310S, or SMLJ60S10-TP.

Q: What is the operating temperature range impact when substituting parts?

A: UFS380J/TR13 operates from -55°C to 175°C. Most substitutes operate to 150°C maximum, reducing the upper limit by 25°C. STTH310S maintains the 175°C upper limit. If your application requires operation above 150°C, STTH310S is the appropriate choice. For standard industrial applications (-40°C to 85°C or -55°C to 125°C), all substitutes are acceptable.

Q: Can I use RS3M-13-F or STTH310S in a circuit designed for 800 V operation?

A: Yes. Both parts are rated for 1000 V, which exceeds the 800 V requirement. They are electrically compatible and provide voltage margin. RS3M-13-F is Fast Recovery (500 ns trr) with 1.3 V forward voltage. STTH310S is Fast Recovery (75 ns trr) with 1.7 V forward voltage. Both maintain 3 A current rating and DO-214AB SMC package compatibility.

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