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UES1304 Equivalent & Substitute Parts Reference
Part Overview
The UES1304 from Microchip Technology is a fast recovery general-purpose diode, categorized under diodes, rectifiers. It features a 200 V maximum reverse voltage, a 5A average rectified current rating, and an axial through-hole B package. The part is currently active but is RoHS non-compliant, which may drive the need to identify alternative models for applications requiring RoHS-compliant products or supply chain flexibility.
Substiute Parts
Key Parameters
| Parameter | UES1304 |
|---|---|
| Manufacturer | Microchip Technology |
| Category | Diodes, Rectifiers |
| Voltage - DC Reverse (Vr) (Max) | 200 V |
| Current - Average Rectified (Io) | 5A |
| Voltage - Forward (Vf) (Max) @ If | 1.25 V @ 3 A |
| Speed | Fast Recovery =< 500ns, > 200mA (Io) |
| Reverse Recovery Time (trr) | 50 ns |
| Mounting Type | Through Hole |
| Package / Case | B, Axial |
| Operating Temperature - Junction | -55°C ~ 150°C |
| RoHS Status | RoHS non-compliant |
| REACH Status | REACH Unaffected |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitution is based strictly on the following parameters: diode category, voltage - DC reverse (200 V), average rectified current, voltage forward drop at specified current, reverse recovery speed, and through-hole axial package compatibility. Only parts matching or exceeding these critical performance parameters, and sharing the key package/mounting type attributes, are considered for substitution.
Parameter Comparison
| Parameter | UES1304 | STTH302 |
|---|---|---|
| Manufacturer | Microchip Technology | STMicroelectronics |
| Category | Diodes, Rectifiers | Diodes, Rectifiers |
| Voltage - DC Reverse (Vr) (Max) | 200 V | 200 V |
| Current - Average Rectified (Io) | 5A | 3A |
| Voltage - Forward (Vf) (Max) @ If | 1.25 V @ 3 A | 950 mV @ 3 A |
| Speed | Fast Recovery =< 500ns, > 200mA (Io) | Fast Recovery =< 500ns, > 200mA (Io) |
| Reverse Recovery Time (trr) | 50 ns | 35 ns |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | B, Axial | DO-201AD, Axial |
| Operating Temperature - Junction | -55°C ~ 150°C | 175°C (Max) |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| REACH Status | REACH Unaffected | REACH Unaffected |
| Product Status | Active | Active |
Engineering Selection Recommendations
UES1304 is active and does not meet RoHS compliance requirements. STTH302 is also active and is ROHS3 compliant. Both parts are REACH unaffected. Selection for applications requiring RoHS compliance should consider STTH302, subject to application requirements for current rating and exact package compatibility.
Frequently Asked Questions (FAQ)
Q1: What is the main difference between UES1304 and STTH302?
A1: The principal differences are the average rectified current rating (5A for UES1304, 3A for STTH302), forward voltage at 3A, and RoHS compliance.
Q2: Is the STTH302 a direct replacement for the UES1304?
A2: STTH302 matches in voltage rating and diode speed but has a lower average rectified current and a different axial package type.
Q3: Are both parts through-hole compatible?
A3: Yes, both are through-hole diodes in axial packages but use different case specifications (B, Axial vs. DO-201AD, Axial).
Q4: Can STTH302 be used where RoHS compliance is mandatory?
A4: Yes, STTH302 is ROHS3 compliant; UES1304 is not RoHS compliant.
Q5: Are there differences in the operating temperature range?
A5: UES1304 is rated for -55°C ~ 150°C, whereas STTH302 supports up to 175°C junction temperature.
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