Request Quote
(Ships tomorrow)
SK24AH Schottky Diode Equivalent & Substitute Parts
Part Overview
The SK24AH is an active automotive-grade Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation. This component operates at 40 V DC reverse voltage with 2 A average rectified current in a surface mount DO-214AC (SMA) package. The SK24AH is AEC-Q101 qualified and RoHS3 compliant, designed for fast recovery applications requiring switching speeds of 500 ns or less at currents exceeding 200 mA. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity while maintaining electrical and mechanical compatibility within specified parameters.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Technology | Schottky | — |
| Voltage - DC Reverse (Vr) (Max) | 40 | V |
| Current - Average Rectified (Io) | 2 | A |
| Voltage - Forward (Vf) (Max) @ If | 500 | mV @ 2 A |
| Speed | Fast Recovery ≤ 500 ns, > 200 mA (Io) | — |
| Current - Reverse Leakage @ Vr | 500 | µA @ 40 V |
| Grade | Automotive | — |
| Qualification | AEC-Q101 | — |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AC, SMA | — |
| Operating Temperature - Junction | -55 to 150 | °C |
| RoHS Status | RoHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the SK24AH are classified based on electrical parameter compatibility and mechanical form factor. The primary substitution criteria are:
Electrical Parameters:
- Voltage - DC Reverse (Vr) (Max): 40 V
- Current - Average Rectified (Io): 2 A
- Technology: Schottky
- Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
- Mounting Type: Surface Mount
Mechanical Parameters:
- Package / Case: DO-214AC, SMA
- Supplier Device Package: DO-214AC (SMA) or SMA
Compliance Parameters:
- RoHS Status: RoHS3 Compliant
- Moisture Sensitivity Level (MSL): 1 (Unlimited)
Direct Equivalents maintain identical electrical ratings (40 V, 2 A) and package form factor. Parametric Equivalents meet the same voltage and current specifications with minor variations in forward voltage or leakage current. Similar Parts share the same voltage rating but differ in current capacity (1 A or 3 A) or package variant (SMB, SOD-323), suitable for applications where current requirements differ from the primary specification.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Vr (Max) [V] | Io [A] | Vf (Max) @ If [mV] | Reverse Leakage @ Vr [µA] | Package | AEC-Q101 | Operating Temp [°C] |
|---|---|---|---|---|---|---|---|---|
| SK24AH | Taiwan Semiconductor Corporation | 40 | 2 | 500 @ 2 A | 500 @ 40 V | DO-214AC (SMA) | Yes | -55 to 150 |
| SK24A | Good-Ark Semiconductor | 40 | 2 | 550 @ 2 A | 200 @ 40 V | DO-214AC (SMA) | Yes | -55 to 150 |
| B240AQ-13-F | Diodes Incorporated | 40 | 2 | 500 @ 2 A | 500 @ 40 V | DO-214AC (SMA) | Yes | -65 to 150 |
| CMSH2-40M TR13 PBFREE | Central Semiconductor Corp | 40 | 2 | 550 @ 2 A | 500 @ 40 V | DO-214AC (SMA) | No | -65 to 150 |
| B140-13-F | Diodes Incorporated | 40 | 1 | 500 @ 1 A | 500 @ 40 V | DO-214AC (SMA) | Yes | -65 to 150 |
| B140B-13-F | Diodes Incorporated | 40 | 1 | 500 @ 1 A | 500 @ 40 V | DO-214AA (SMB) | No | -65 to 150 |
| B140HB-13-F | Diodes Incorporated | 40 | 1 | 530 @ 1 A | 100 @ 40 V | DO-214AA (SMB) | No | -55 to 150 |
| B140Q-13-F | Diodes Incorporated | 40 | 1 | 500 @ 1 A | 500 @ 40 V | DO-214AC (SMA) | Yes | -65 to 150 |
| B140WS-7 | Diodes Incorporated | 40 | 1 | 620 @ 1 A | 50 @ 40 V | SC-76 (SOD-323) | No | -40 to 125 |
| B340A-E3/5AT | Vishay General Semiconductor - Diodes Division | 40 | 3 | 550 @ 3 A | 500 @ 40 V | DO-214AC (SMA) | No | -65 to 150 |
| B340A-M3/5AT | Vishay General Semiconductor - Diodes Division | 40 | 3 | 550 @ 3 A | 500 @ 40 V | DO-214AC (SMA) | No | -65 to 150 |
Engineering Selection Recommendations
Direct Equivalents (40 V, 2 A, DO-214AC SMA):
The B240AQ-13-F from Diodes Incorporated is a direct electrical equivalent with identical forward voltage (500 mV @ 2 A) and reverse leakage (500 µA @ 40 V). Both SK24AH and B240AQ-13-F carry AEC-Q101 qualification and RoHS3 compliance. The B240AQ-13-F extends the operating temperature range to -65°C, providing additional thermal margin in low-temperature applications.
The SK24A from Good-Ark Semiconductor maintains 40 V and 2 A ratings with AEC-Q101 qualification and RoHS3 compliance. Forward voltage is 550 mV @ 2 A (50 mV higher than SK24AH), and reverse leakage is reduced to 200 µA @ 40 V. This part is suitable for applications where lower leakage current is beneficial.
The CMSH2-40M TR13 PBFREE from Central Semiconductor Corp meets the 40 V, 2 A electrical specification with RoHS3 compliance. This part does not carry AEC-Q101 qualification and is not recommended for automotive applications requiring this certification.
Parametric Equivalents (40 V, 2 A, Alternative Packages):
No parametric equivalents with 2 A rating in alternative packages are provided in the substitute list.
Similar Parts (40 V, 1 A, DO-214AC SMA):
The B140-13-F and B140Q-13-F from Diodes Incorporated are 1 A rated alternatives in DO-214AC (SMA) package. Both carry AEC-Q101 qualification and RoHS3 compliance. These parts are suitable for applications requiring lower current capacity than the SK24AH.
Similar Parts (40 V, 1 A, Alternative Packages):
The B140B-13-F (DO-214AA SMB package) and B140WS-7 (SOD-323 package) provide 1 A alternatives in different form factors. The B140B-13-F does not carry AEC-Q101 qualification. The B140WS-7 operates at a reduced temperature range (-40°C to 125°C) and does not carry AEC-Q101 qualification.
Higher Current Alternative (40 V, 3 A, DO-214AC SMA):
The B340A-E3/5AT and B340A-M3/5AT from Vishay General Semiconductor provide 3 A capacity in the same DO-214AC (SMA) package. Neither part carries AEC-Q101 qualification. These parts are suitable for applications requiring higher current capacity than the SK24AH.
Frequently Asked Questions (FAQ)
Q: Can SK24A replace SK24AH in automotive applications?
A: SK24A meets the 40 V, 2 A electrical specification and carries AEC-Q101 qualification with RoHS3 compliance. Forward voltage is 50 mV higher (550 mV vs. 500 mV @ 2 A), and reverse leakage is lower (200 µA vs. 500 µA @ 40 V). Substitution is permissible where the higher forward voltage does not exceed circuit design margins.
Q: Is B240AQ-13-F a direct replacement for SK24AH?
A: B240AQ-13-F is electrically equivalent with identical 40 V, 2 A ratings, 500 mV forward voltage @ 2 A, and 500 µA reverse leakage @ 40 V. Both parts are AEC-Q101 qualified and RoHS3 compliant. B240AQ-13-F extends the operating temperature range to -65°C. The parts are mechanically and electrically interchangeable.
Q: Can 1 A rated diodes (B140 series) replace the 2 A SK24AH?
A: No. The B140 series is rated for 1 A average rectified current, which is insufficient for applications designed for 2 A operation. Using a 1 A part in a 2 A circuit will result in thermal stress and potential device failure.
Q: What is the difference between B140-13-F and B140Q-13-F?
A: Both parts are 1 A, 40 V Schottky diodes in DO-214AC (SMA) package with identical electrical characteristics (500 mV forward voltage @ 1 A, 500 µA reverse leakage @ 40 V). Both carry AEC-Q101 qualification and RoHS3 compliance. The parts are functionally equivalent.
Q: Why does CMSH2-40M TR13 PBFREE lack AEC-Q101 qualification?
A: AEC-Q101 qualification is not provided in the component data. This part is not recommended for automotive applications requiring this certification. Verification with the manufacturer is required for automotive use.
Q: Can B340A series (3 A) be used instead of SK24AH (2 A)?
A: B340A series parts are rated for 3 A average rectified current and maintain 40 V reverse voltage in the same DO-214AC (SMA) package. These parts can be used in applications designed for 2 A operation, as they provide higher current capacity. However, B340A series parts do not carry AEC-Q101 qualification.
Q: What is the impact of operating temperature range differences?
A: SK24AH operates from -55°C to 150°C. B240AQ-13-F extends the lower limit to -65°C. Applications operating below -55°C require the extended range. Applications operating above 150°C are not supported by either part.
Q: Are all substitute parts RoHS3 compliant?
A: All parts listed carry RoHS3 compliance status. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no moisture sensitivity restrictions during storage and handling.
Q: What packaging options are available for 40 V, 2 A Schottky diodes?
A: The SK24AH and its direct equivalents are available in DO-214AC (SMA) package only. No alternative packages (SMB, SOD-323) are provided for the 2 A rating in the substitute list.
Q: How do forward voltage differences affect circuit performance?
A: Forward voltage variations (500 mV to 550 mV @ 2 A) result in different voltage drops across the diode. Higher forward voltage increases power dissipation and heat generation. Circuit design margins must accommodate the maximum forward voltage of the selected part.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts