UFS305J/TR13 Equivalent & Substitute Parts

Part Overview

The UFS305J/TR13 is a general-purpose rectifier diode manufactured by Microchip Technology, rated for 50 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. Substitute parts are necessary when addressing RoHS compliance requirements, managing inventory constraints, or accommodating design flexibility across multiple qualified manufacturers while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	50 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 3 A
Reverse Recovery Time (trr)	30 ns
Current - Reverse Leakage @ Vr	10 µA @ 50 V
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 175°C

Substitute Part Grouping Explanation

Substitution eligibility for the UFS305J/TR13 is determined by the following critical parameters:

Primary Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): 50 V (exact match required)
Current - Average Rectified (Io): 3 A (exact match required)
Package / Case: DO-214AB, SMC (exact match required)
Mounting Type: Surface Mount (exact match required)

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: Must not exceed 950 mV @ 3 A for direct substitution
Reverse Recovery Time (trr): Fast recovery characteristics preferred but not mandatory
Current - Reverse Leakage @ Vr: Must not exceed 10 µA @ 50 V
Operating Temperature - Junction: Must support minimum -55°C to 150°C range

Substitute parts meeting all primary criteria and secondary parameters are electrically and mechanically interchangeable with the UFS305J/TR13 in standard circuit applications.

Parameter Comparison

Parameter	UFS305J/TR13 (Microchip)	ES3A (Taiwan Semiconductor)	ES3A-13-F (Diodes Inc.)	S3A-13-F (Diodes Inc.)	SMLJ60S05-TP (MCC)	S10A-TP (MCC)
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V	50 V	50 V	50 V
Current - Average Rectified (Io)	3 A	3 A	3 A	3 A	6 A	10 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 3 A	950 mV @ 3 A	900 mV @ 3 A	1.15 V @ 3 A	1 V @ 6 A	1.2 V @ 10 A
Reverse Recovery Time (trr)	30 ns	35 ns	25 ns	Not specified	Not specified	Not specified
Current - Reverse Leakage @ Vr	10 µA @ 50 V	10 µA @ 50 V	10 µA @ 50 V	10 µA @ 50 V	5 µA @ 50 V	10 µA @ 50 V
Package / Case	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C ~ 175°C	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Not For New Designs	Obsolete

Engineering Selection Recommendations

Direct Substitutes (3 A, 50 V Rating):

ES3A (Taiwan Semiconductor Corporation) and ES3A-13-F (Diodes Incorporated) are electrically equivalent to the UFS305J/TR13 with identical voltage and current ratings. Both parts are ROHS3 compliant, addressing RoHS non-compliance of the original part. ES3A-13-F offers superior reverse recovery time (25 ns versus 30 ns) and lower forward voltage (900 mV versus 950 mV), resulting in reduced power dissipation. Both parts support the required operating temperature range of -55°C to 150°C.

S3A-13-F (Diodes Incorporated) maintains 50 V and 3 A ratings with ROHS3 compliance and extended lower temperature rating (-65°C). Forward voltage is specified at 1.15 V @ 3 A, which exceeds the UFS305J/TR13 specification but remains within acceptable tolerance for general-purpose rectification applications.

Higher Current Alternatives (Not Direct Substitutes):

SMLJ60S05-TP (Micro Commercial Co) is rated for 6 A at 50 V and is ROHS3 compliant. This part is marked "Not For New Designs" and is suitable only for legacy system maintenance or applications requiring higher current capacity than the original 3 A specification.

S10A-TP (Micro Commercial Co) is rated for 10 A at 50 V but is classified as Obsolete. This part is not recommended for new designs or ongoing production use.

Compliance Consideration:

For applications requiring RoHS3 compliance, ES3A, ES3A-13-F, or S3A-13-F are the appropriate selections. All three parts maintain electrical compatibility with the UFS305J/TR13 while meeting modern regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can ES3A be used as a direct replacement for UFS305J/TR13?

A: Yes. ES3A matches the UFS305J/TR13 in voltage rating (50 V), current rating (3 A), and package type (DO-214AB, SMC). Both parts are surface mount components with identical mechanical compatibility. ES3A is ROHS3 compliant, whereas UFS305J/TR13 is not.

Q: What is the difference between ES3A and ES3A-13-F?

A: Both parts are manufactured by different suppliers (Taiwan Semiconductor Corporation versus Diodes Incorporated) but share identical voltage and current ratings (50 V, 3 A). ES3A-13-F has a lower forward voltage (900 mV versus 950 mV @ 3 A) and faster reverse recovery time (25 ns versus 35 ns), resulting in lower power dissipation. Both are ROHS3 compliant and support the required temperature range.

Q: Why are SMLJ60S05-TP and S10A-TP listed as substitutes if they have different current ratings?

A: SMLJ60S05-TP (6 A) and S10A-TP (10 A) are listed as alternatives for applications where higher current capacity is required beyond the original 3 A specification. These parts maintain the 50 V voltage rating and DO-214AB package compatibility. However, they are not direct electrical equivalents and should be selected only when circuit requirements exceed 3 A. SMLJ60S05-TP is marked "Not For New Designs" and S10A-TP is Obsolete.

Q: Is the operating temperature range difference between UFS305J/TR13 (-55°C to 175°C) and substitute parts (-55°C to 150°C) significant?

A: The UFS305J/TR13 supports a higher maximum junction temperature (175°C versus 150°C). For applications operating near or above 150°C, the UFS305J/TR13 is required. For standard applications operating below 150°C, substitute parts with the lower temperature rating are fully compatible.

Q: Which substitute part offers the best performance improvement over UFS305J/TR13?

A: ES3A-13-F provides the lowest forward voltage (900 mV @ 3 A) and fastest reverse recovery time (25 ns), resulting in reduced power dissipation and improved switching characteristics compared to the UFS305J/TR13 (950 mV, 30 ns). ES3A-13-F is ROHS3 compliant and maintains full electrical and mechanical compatibility.

Q: Can S3A-13-F be used in high-temperature applications?

A: S3A-13-F supports an operating temperature range of -65°C to 150°C, which is lower than the UFS305J/TR13 (-55°C to 175°C). For applications requiring operation above 150°C, S3A-13-F is not suitable. For applications within the -65°C to 150°C range, S3A-13-F is fully compatible and offers ROHS3 compliance.

Q: Are all substitute parts available in the same packaging format as UFS305J/TR13?

A: All substitute parts use the DO-214AB (SMC) surface mount package, ensuring mechanical compatibility with the UFS305J/TR13. Packaging formats vary by supplier (Tape & Reel, Cut Tape & Digi-Reel®) but do not affect electrical performance or PCB assembly compatibility.

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