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SK34SMB Equivalent & Substitute Parts Reference
Part Overview
SK34SMB is a Schottky diode manufactured by Diotec Semiconductor, categorized under Diodes, Rectifiers. Designed for fast recovery applications, it features a maximum DC reverse voltage of 40 V, an average rectified current of 3A, and a surface mount DO-214AA (SMB) package. The part is currently active and compliant with RoHS3 and REACH standards. Alternatives and substitutes are required primarily for inventory management, procurement flexibility, or to address supply constraints while maintaining electrical and mechanical compatibility.
Substiute Parts
Key Parameters
| Parameter | SK34SMB | Description |
|---|---|---|
| Category | Diodes, Rectifiers | Product class |
| Technology | Schottky | Diode type |
| Voltage - DC Reverse (Vr) (Max) | 40 V | Maximum reverse voltage |
| Current - Average Rectified (Io) | 3A | Rated average current |
| Voltage - Forward (Vf) (Max) @ If | 550 mV @ 3A | Forward voltage at rated current |
| Speed | Fast Recovery =< 500ns, > 200mA (Io) | Switching speed range |
| Current - Reverse Leakage @ Vr | 200 µA @ 40V | Reverse leakage current |
| Mounting Type | Surface Mount | Mounting method |
| Package / Case | DO-214AA, SMB | Physical package |
| Operating Temperature - Junction | -50°C ~ 150°C | Temperature range |
| RoHS Status | ROHS3 Compliant | Environment compliance |
| REACH Status | REACH Unaffected | Environment compliance |
| Product Status | Active | Lifecycle status |
Substitute Part Grouping Explanation
Substitute parts for SK34SMB must meet identical core electrical and mechanical parameters: Schottky technology, 40 V maximum DC reverse voltage, 3A average rectified current, DO-214AA (SMB) surface mount package, and fast recovery speed. Additional requirements include compliance with RoHS3 and REACH standards, matching operating temperature range, and active product status.
Key parameters for substitution:
- Category: Diodes, Rectifiers
- Technology: Schottky
- Voltage - DC Reverse (Vr) (Max): 40 V
- Current - Average Rectified (Io): 3A
- Voltage - Forward (Vf) (Max) @ If
- Speed
- Current - Reverse Leakage @ Vr
- Mounting Type
- Package / Case
- Operating Temperature - Junction
- RoHS and REACH compliance
Parameter Comparison
| Parameter | SK34SMB (Diotec Semiconductor) | B340LB-E3/52T (Vishay General Semiconductor) |
|---|---|---|
| Category | Diodes, Rectifiers | Diodes, Rectifiers |
| Technology | Schottky | Schottky |
| Voltage - DC Reverse (Vr) (Max) | 40 V | 40 V |
| Current - Average Rectified (Io) | 3A | 3A |
| Voltage - Forward (Vf) (Max) @ If | 550 mV @ 3A | 450 mV @ 3A |
| Speed | Fast Recovery =< 500ns, > 200mA (Io) | Fast Recovery =< 500ns, > 200mA (Io) |
| Current - Reverse Leakage @ Vr | 200 µA @ 40 V | 400 µA @ 40 V |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | DO-214AA, SMB | DO-214AA, SMB |
| Operating Temperature - Junction | -50°C ~ 150°C | -65°C ~ 150°C |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| REACH Status | REACH Unaffected | REACH Unaffected |
| Product Status | Active | Active |
Engineering Selection Recommendations
Select substitute parts only with an active product status and verified environmental compliance (ROHS3 and REACH Unaffected) as provided. Both SK34SMB and B340LB-E3/52T meet these criteria.
Frequently Asked Questions (FAQ)
Q1: Which electrical parameters must match when selecting a substitute for SK34SMB in Diodes, Rectifiers?
A1: Substitute parts must match Schottky technology, 40 V DC reverse voltage (maximum), 3A average rectified current, forward voltage rating, fast recovery speed, and reverse leakage current at the specified voltage.
Q2: Is physical package compatibility required for substitution?
A2: Yes. The substitute part must have the DO-214AA (SMB) surface mount package to ensure mechanical fit and PCB compatibility.
Q3: Are RoHS and REACH compliance mandatory for substitute selection?
A3: Yes. All substitute components specified must be ROHS3 compliant and REACH unaffected to meet current environmental and regulatory standards.
Q4: Can substitute diodes be used irrespective of slight differences in forward voltage or leakage current?
A4: Substitution is accepted only where all provided electrical and mechanical parameters meet the defined requirements. Differences must be within the explicitly provided tolerances.
Q5: How critical is operating temperature range in selecting substitutes?
A5: Substitute parts must provide an operating temperature range equal to or exceeding the values given for reliable performance under specified conditions.
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