SR1640 Schottky Diode Array Equivalent & Substitute Parts

Part Overview

The SR1640 is a Schottky diode array in a 1 Pair Common Cathode configuration rated for 40 V DC reverse voltage and 16 A average rectified current per diode. The device is packaged in a TO-220-3 through-hole format and features fast recovery characteristics with a maximum forward voltage of 550 mV at 8 A. The SR1640 has been discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility for existing designs.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io) (per Diode)	16 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 8 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 40 V
Operating Temperature - Junction	-55°C ~ 125°C
Mounting Type	Through Hole
Package / Case	TO-220-3
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SR1640 are classified into two categories based on electrical and mechanical parameter alignment:

Parametric Equivalents maintain identical or functionally equivalent electrical specifications across all critical parameters: 40 V reverse voltage rating, 16 A average rectified current, 550 mV forward voltage at 8 A, fast recovery speed, common cathode configuration, and TO-220-3 package. These parts are direct replacements with no circuit redesign required.

Similar Parts share the same reverse voltage rating (40 V), diode configuration (1 Pair Common Cathode), technology (Schottky), and package type (TO-220-3), but differ in one or more of the following parameters: average rectified current per diode, forward voltage characteristics, reverse leakage current, or operating temperature range. Selection of similar parts requires verification that the application tolerates the parameter differences.

Key parameters determining substitution eligibility:

Voltage - DC Reverse (Vr) (Max): Must be ≥ 40 V
Diode Configuration: Must be 1 Pair Common Cathode
Package / Case: Must be TO-220-3 or compatible through-hole package
Technology: Schottky
Mounting Type: Through Hole

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Reverse Leakage @ Vr	Tj (Operating)	Package	Product Status	Classification
SR1640	Taiwan Semiconductor Corporation	40 V	16 A	550 mV @ 8 A	500 µA @ 40 V	-55°C ~ 125°C	TO-220-3	Discontinued	Main Part
SR1640HC0G	Taiwan Semiconductor Corporation	40 V	16 A	550 mV @ 8 A	500 µA @ 40 V	-55°C ~ 125°C	TO-220-3	Active	Parametric Equivalent
SR1640PT C0G	Taiwan Semiconductor Corporation	40 V	16 A	550 mV @ 8 A	500 µA @ 40 V	-55°C ~ 125°C	TO-247-3	Active	Parametric Equivalent
SB1640CT_T0_00001	Panjit International Inc.	40 V	16 A	550 mV @ 8 A	200 µA @ 40 V	-55°C ~ 150°C	TO-220-3	Active	Parametric Equivalent
MBR3040CTE3/TU	Microchip Technology	40 V	15 A	700 mV @ 15 A	50 µA @ 40 V	-65°C ~ 150°C	TO-220-3	Active	Similar Part
MBR3040FCTE3/TU	Microchip Technology	40 V	15 A	700 mV @ 15 A	50 µA @ 40 V	-65°C ~ 150°C	TO-220-3	Active	Similar Part
MBR2040CT	Diodes Incorporated	40 V	20 A	840 mV @ 20 A	100 µA @ 40 V	-55°C ~ 150°C	TO-220-3	Active	Similar Part
SBL1040CT-E3/45	Vishay General Semiconductor - Diodes Division	40 V	5 A	550 mV @ 5 A	500 µA @ 40 V	-40°C ~ 125°C	TO-220-3	Active	Similar Part

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents):

The SR1640HC0G from Taiwan Semiconductor Corporation is an active parametric equivalent with identical electrical specifications and TO-220-3 packaging. This part carries AEC-Q101 automotive qualification and is recommended for applications requiring automotive-grade reliability. The SR1640HC0G is available in active production status with 949 units in stock.

The SB1640CT_T0_00001 from Panjit International Inc. is a parametric equivalent with matching 40 V, 16 A, and 550 mV specifications. This part offers an extended operating temperature range to 150°C and lower reverse leakage current (200 µA versus 500 µA), providing improved performance margins. The SB1640CT_T0_00001 is available in active production status with 2297 units in stock.

The SR1640PT C0G from Taiwan Semiconductor Corporation maintains identical electrical specifications but uses a TO-247-3 package instead of TO-220-3. This part is suitable only for applications where the larger TO-247-3 footprint is acceptable or preferred for thermal management. The SR1640PT C0G is available in active production status with 728 units in stock.

For Similar Substitution (Current or Thermal Derating Required):

The MBR3040CTE3/TU and MBR3040FCTE3/TU from Microchip Technology are rated for 15 A average rectified current, which is 1 A below the SR1640 specification. These parts are suitable for applications where the 16 A rating is not fully utilized or where thermal derating is acceptable. Both parts offer extended operating temperature range to 150°C and significantly lower reverse leakage current (50 µA). The MBR3040CTE3/TU is available with 959 units in stock; the MBR3040FCTE3/TU is available with 1056 units in stock.

The MBR2040CT from Diodes Incorporated is rated for 20 A average rectified current, exceeding the SR1640 specification. However, the forward voltage is higher at 840 mV @ 20 A compared to 550 mV @ 8 A for the SR1640. This part is suitable for applications where higher current capacity is required and increased forward voltage drop is acceptable. The MBR2040CT is available in active production status with 1516 units in stock.

The SBL1040CT-E3/45 from Vishay General Semiconductor is rated for only 5 A average rectified current and is not suitable as a substitute for the SR1640 in applications requiring the full 16 A capacity. This part is listed only for reference and is not recommended for SR1640 replacement.

All recommended substitute parts are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and are REACH unaffected, maintaining regulatory compliance with the original SR1640.

Frequently Asked Questions (FAQ)

Q: Can the SR1640HC0G be used as a direct replacement for the SR1640?

A: Yes. The SR1640HC0G is a parametric equivalent with identical electrical specifications: 40 V reverse voltage, 16 A average rectified current per diode, 550 mV forward voltage at 8 A, and TO-220-3 package. The SR1640HC0G is in active production and carries AEC-Q101 automotive qualification. No circuit modifications are required.

Q: What is the difference between the SR1640PT C0G and the SR1640?

A: The SR1640PT C0G is electrically identical to the SR1640 but uses a TO-247-3 package instead of TO-220-3. The TO-247-3 package is larger and provides improved thermal characteristics. This part is suitable only for applications where the larger footprint can be accommodated on the printed circuit board.

Q: Can the MBR3040CTE3/TU replace the SR1640 in all applications?

A: The MBR3040CTE3/TU is rated for 15 A average rectified current, which is 1 A below the SR1640 specification. This part is suitable for applications where the full 16 A capacity is not required or where thermal derating is acceptable. The MBR3040CTE3/TU offers improved performance characteristics including lower reverse leakage current (50 µA versus 500 µA) and extended operating temperature range to 150°C.

Q: Why is the SBL1040CT-E3/45 not recommended as a substitute?

A: The SBL1040CT-E3/45 is rated for only 5 A average rectified current, which is significantly below the SR1640 specification of 16 A. This part cannot handle the current requirements of applications designed for the SR1640 and is not suitable as a substitute.

Q: What are the key parameters that determine if a part can substitute for the SR1640?

A: The critical parameters are: (1) Voltage - DC Reverse (Vr) rating of at least 40 V, (2) Diode configuration of 1 Pair Common Cathode, (3) Through-hole mounting type, (4) TO-220-3 or compatible package, and (5) Schottky technology. Average rectified current, forward voltage, and reverse leakage current determine whether a part is a parametric equivalent or a similar part requiring application verification.

Q: Is the SB1640CT_T0_00001 compatible with the SR1640 in terms of package and pinout?

A: Yes. The SB1640CT_T0_00001 uses the same TO-220-3 package and maintains the same 1 Pair Common Cathode configuration as the SR1640. The pinout is compatible, and the part is a parametric equivalent with identical electrical specifications. The SB1640CT_T0_00001 offers improved performance with lower reverse leakage current and extended operating temperature range.

Q: Can the MBR2040CT be used in place of the SR1640 if higher current capacity is needed?

A: The MBR2040CT is rated for 20 A average rectified current, which exceeds the SR1640 specification. However, the forward voltage is higher at 840 mV @ 20 A. This part is suitable for applications where higher current capacity is required and the increased forward voltage drop does not negatively impact circuit performance. Thermal analysis is recommended to ensure the application can tolerate the higher power dissipation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, maintaining regulatory compliance with the original SR1640.

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