UES1001 Equivalent & Substitute Parts Reference

Part Overview

The UES1001, manufactured by Microchip Technology, is a fast recovery general-purpose rectifier diode classified under the Diodes, Rectifiers category. It is supplied in bulk packaging, featuring a through-hole axial mounting in package type "A". The device is rated for DC reverse voltage up to 50 V and can handle an average rectified current of 1A. Its fast reverse recovery time of 25ns, together with an operating junction temperature range from -55°C to 175°C and a forward voltage drop of 975 mV at 1A, make it suitable for applications requiring efficient switching. The product status is "Active" with 894 pieces available. Identifying alternatives is essential when inventory constraints arise or if similar performance and package characteristics are needed for a design.

Key Parameters

Part Number	Manufacturer	Category	Packaging	Voltage - DC Reverse (Vr) (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Speed	Reverse Recovery Time (trr)	Mounting Type	Package / Case	Operating Temperature - Junction	Product Status	Moisture Sensitivity Level (MSL)	REACH Status	ECCN	HTSUS
UES1001	Microchip Technology	Diodes, Rectifiers	Bulk	50 V	1A	975 mV @ 1A	Fast Recovery =< 500ns, > 200mA (Io)	25 ns	Through Hole	A, Axial	-55°C ~ 175°C	Active	Not Applicable	REACH Unaffected	EAR99	8541.10.0080
STTH102	STMicroelectronics	Diodes, Rectifiers	Cut Tape (CT)	200 V	1A	970 mV @ 1A	Fast Recovery =< 500ns, > 200mA (Io)	20 ns	Through Hole	DO-204AL, DO-41, Axial	175°C (Max)	Active	1 (Unlimited)	REACH Unaffected	EAR99	8541.10.0080

Substitute Part Grouping Explanation

Substitute part selection within the diodes, rectifiers category is strictly determined by matching key allowed parameters. These parameters include voltage ratings, current handling capability, speed and reverse recovery time, mounting type, package or case compatibility, and regulatory compliance. Parts are grouped for substitution when they share identical or superior electrical ratings, similar mechanical form factors, and matching compliance attributes.

Parameter Comparison

Parameter	UES1001	STTH102
Voltage - DC Reverse (Vr) (Max)	50 V	200 V
Current - Average Rectified (Io)	1A	1A
Voltage - Forward (Vf) (Max) @ If	975 mV @ 1A	970 mV @ 1A
Reverse Recovery Time (trr)	25 ns	20 ns
Mounting Type	Through Hole	Through Hole
Package / Case	A, Axial	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C ~ 175°C	175°C (Max)
Product Status	Active	Active
Moisture Sensitivity Level (MSL)	Not Applicable	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8541.10.0080	8541.10.0080

Engineering Selection Recommendations

Both the UES1001 and STTH102 diodes are designated "Active" and are classified under ECCN EAR99. They are REACH Unaffected and match regarding RoHS compliance status as specified. Both parts are available from stock and are offered in through-hole, axial packages, suitable for mechanical equivalence in applications where these mounting requirements are critical.

Frequently Asked Questions (FAQ)

Q1: What substitution criteria determine compatibility between UES1001 and STTH102?
A1: Compatibility is based strictly on voltage, current, forward voltage drop, reverse recovery time, mounting type, and regulatory compliance parameters.

Q2: Are the package types comparable for direct replacement?
A2: Both parts utilize through-hole, axial mounting. UES1001 uses package "A, Axial" while STTH102 uses "DO-204AL, DO-41, Axial". Compatibility is based on the through-hole axial form factor.

Q3: Does the difference in maximum reverse voltage affect substitution?
A3: STTH102 has a higher maximum reverse voltage rating (200 V compared to 50 V for UES1001), and matches or exceeds the electrical performance requirements as specified.

Q4: Is the reverse recovery time within comparable specification?
A4: Both parts are in the fast recovery category (≤500ns). STTH102 has a reverse recovery time of 20ns compared to 25ns for UES1001.

Q5: How do compliance and inventory status affect selection?
A5: Both diodes are actively available, unaffected by REACH, compliant with ECCN EAR99, and share the same HTSUS code, indicating like-for-like substitution on regulatory grounds.

Q6: Is moisture sensitivity level pertinent for these through-hole devices?
A6: UES1001 is specified as "Not Applicable" for MSL, while STTH102 is rated "1 (Unlimited)", both suitable for typical through-hole mounting requirements.

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