SR1660 Equivalent & Substitute Parts

Part Overview

The SR1660 is a Schottky diode array featuring one pair common cathode configuration rated for 60V DC reverse voltage and 16A average rectified current per diode. Manufactured by Taiwan Semiconductor Corporation, this component is packaged in TO-220-3 through-hole format and designed for fast recovery applications with switching speeds ≤500ns.

The SR1660 is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement. Alternative parts maintain the same electrical specifications or provide compatible performance within defined parameter ranges while accommodating different package options and manufacturer sources.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	60	V
Current - Average Rectified (Io) (per Diode)	16	A
Voltage - Forward (Vf) (Max) @ If	700 mV @ 8 A	—
Speed	Fast Recovery ≤500ns, >200mA (Io)	—
Current - Reverse Leakage @ Vr	500 µA @ 60 V	—
Operating Temperature - Junction	-55°C ~ 150°C	—
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SR1660 is determined by the following critical parameters:

Mandatory Matching Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 60V
Mounting Type: Through Hole
Speed: Fast Recovery ≤500ns, >200mA (Io)

Flexible Parameters (Allow Variation):

Current - Average Rectified (Io) (per Diode): 16A baseline; substitutes rated 15A or higher are acceptable
Voltage - Forward (Vf) (Max) @ If: Range 550–750 mV acceptable
Current - Reverse Leakage @ Vr: Up to 1 mA @ 60V acceptable
Operating Temperature - Junction: -55°C minimum; upper limit 125°C or higher acceptable
Package / Case: TO-220-3 primary; TO-247-3 acceptable as mechanical alternative

Substitutes are classified into two categories:

Parametric Equivalents: Identical electrical specifications with same or higher current rating, same package, active product status, and automotive qualification where applicable.

Similar Parts: Compatible electrical specifications with current ratings between 5A and 20A, same package family, and active product status. These parts accommodate applications with different current requirements while maintaining voltage and thermal characteristics.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io (per Diode) [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Tj (Min~Max) [°C]	Package	Product Status
SR1660	Taiwan Semiconductor Corporation	60	16	700 @ 8A	500 @ 60V	-55 ~ 150	TO-220-3	Discontinued
SR1660HC0G	Taiwan Semiconductor Corporation	60	16	700 @ 8A	500 @ 60V	-55 ~ 150	TO-220-3	Active
SR1660PT C0G	Taiwan Semiconductor Corporation	60	16	700 @ 8A	500 @ 60V	-55 ~ 150	TO-247-3	Active
DST3060LC	Littelfuse Inc.	60	15	550 @ 15A	300 @ 60V	-55 ~ 125	TO-220-3	Active
MBR1060CT-G1	Diodes Incorporated	60	5	750 @ 5A	100 @ 60V	-55 ~ 150	TO-220-3	Active
MBR1560CT-E3/45	Vishay General Semiconductor - Diodes Division	60	7.5	750 @ 7.5A	1000 @ 60V	-65 ~ 175	TO-220-3	Active
MBR2060CT-LJ	Diodes Incorporated	60	10	640 @ 10A	100 @ 45V	-55 ~ 150	TO-220-3	Obsolete
MBR2560CT-E3/45	Vishay General Semiconductor - Diodes Division	60	15	750 @ 15A	1000 @ 60V	-65 ~ 150	TO-220-3	Active
MBR3060CTE3/TU	Microchip Technology	60	15	750 @ 15A	50 @ 60V	-65 ~ 175	TO-220-3	Active
MBR30H60CT-E3/45	Vishay General Semiconductor - Diodes Division	60	15	680 @ 15A	60 @ 60V	-65 ~ 175	TO-220-3	Active
MBR40L60CTG	onsemi	60	20	610 @ 20A	550 @ 60V	-55 ~ 150	TO-220-3	Active

Engineering Selection Recommendations

Parametric Equivalent - Primary Recommendation:

SR1660HC0G (Taiwan Semiconductor Corporation) is the direct parametric equivalent with identical electrical specifications, same TO-220-3 package, and active product status. This part includes automotive-grade qualification (AEC-Q101) and is recommended for applications requiring exact specification matching with assured supply availability.

Parametric Equivalent - Alternative Package:

SR1660PT C0G (Taiwan Semiconductor Corporation) provides identical electrical performance in TO-247-3 package format. This option accommodates designs requiring enhanced thermal dissipation or different PCB layout constraints while maintaining the same current and voltage ratings.

Similar Parts - Current-Matched Selection:

For applications requiring 15A rated current capacity, three active alternatives are available:

DST3060LC (Littelfuse Inc.) in TO-220-3 package offers lower forward voltage (550 mV @ 15A) and reduced reverse leakage (300 µA @ 60V), suitable for efficiency-critical designs.
MBR2560CT-E3/45 (Vishay General Semiconductor - Diodes Division) provides extended temperature range (-65°C to 150°C) and is available in production quantities.
MBR3060CTE3/TU (Microchip Technology) features the lowest reverse leakage (50 µA @ 60V) and extended junction temperature range (-65°C to 175°C), beneficial for high-temperature applications.
MBR30H60CT-E3/45 (Vishay General Semiconductor - Diodes Division) combines low forward voltage (680 mV @ 15A) with extended temperature capability (-65°C to 175°C).

Similar Parts - Higher Current Capacity:

MBR40L60CTG (onsemi) rated for 20A provides current margin above the SR1660 specification with the lowest forward voltage (610 mV @ 20A) among all listed alternatives. This part is suitable for designs requiring additional current headroom or thermal margin.

Similar Parts - Lower Current Capacity:

MBR1060CT-G1 (Diodes Incorporated) and MBR1560CT-E3/45 (Vishay General Semiconductor - Diodes Division) are suitable for applications with reduced current requirements (5A and 7.5A respectively) and maintain full voltage and thermal compatibility.

Compliance Status:

All recommended parts maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity, and EAR99 export classification. MBR2060CT-LJ is marked obsolete and should not be selected for new designs despite active inventory.

Frequently Asked Questions (FAQ)

Q: Can SR1660HC0G directly replace SR1660 in existing designs?

A: Yes. SR1660HC0G is a parametric equivalent with identical electrical specifications (60V, 16A, 700 mV forward voltage @ 8A), same TO-220-3 package, and compatible thermal characteristics. The primary difference is active product status and automotive-grade qualification (AEC-Q101). No circuit modifications are required.

Q: What is the difference between SR1660 and SR1660PT C0G?

A: Both parts share identical electrical specifications. The difference is package format: SR1660 uses TO-220-3 while SR1660PT C0G uses TO-247-3 (TO-3P). TO-247-3 provides larger lead spacing and enhanced thermal dissipation capability. Selection depends on PCB layout requirements and thermal management strategy.

Q: Can I use MBR40L60CTG (20A) instead of SR1660 (16A)?

A: Yes, with design considerations. MBR40L60CTG maintains the same 60V reverse voltage rating and TO-220-3 package. The higher 20A current rating provides design margin and lower forward voltage (610 mV @ 20A vs. 700 mV @ 8A). Verify that the application circuit can accommodate the lower forward voltage characteristic, which may affect voltage drop calculations in rectification circuits.

Q: Are there temperature range limitations when substituting with MBR1560CT-E3/45?

A: MBR1560CT-E3/45 extends the upper junction temperature limit to 175°C (vs. 150°C for SR1660) and lower limit to -65°C (vs. -55°C). This part is suitable for wide-temperature applications. However, the 7.5A current rating is lower than SR1660's 16A, limiting use to lower-current circuit branches.

Q: What is the significance of reverse leakage current differences among substitutes?

A: Reverse leakage current affects power dissipation and circuit performance at maximum reverse voltage. SR1660 specifies 500 µA @ 60V. Alternatives range from 50 µA (MBR3060CTE3/TU) to 1 mA (MBR1560CT-E3/45, MBR2560CT-E3/45). Lower leakage reduces standby power consumption; higher leakage increases heat generation. Select based on application duty cycle and thermal budget.

Q: Is DST3060LC suitable for high-efficiency applications?

A: DST3060LC offers advantages for efficiency-critical designs: forward voltage of 550 mV @ 15A (lower than SR1660's 700 mV @ 8A) and reduced reverse leakage (300 µA @ 60V). However, the maximum junction temperature is limited to 125°C (vs. 150°C for SR1660). Verify thermal operating conditions before selection.

Q: Can I use MBR1060CT-G1 (5A) in a circuit designed for SR1660 (16A)?

A: MBR1060CT-G1 is suitable only if the actual circuit current requirement is ≤5A. The part maintains 60V voltage rating and TO-220-3 package compatibility. Using an undersized current-rated component in a higher-current application will cause excessive heat generation and potential device failure. Verify actual circuit current draw before substitution.

Q: What does AEC-Q101 qualification mean for automotive applications?

A: AEC-Q101 is the Automotive Electronics Council qualification standard for discrete semiconductors. Parts meeting this standard (SR1660HC0G, MBR2060CT-LJ) have undergone rigorous reliability testing for automotive environments including temperature cycling, vibration, and moisture resistance. Use AEC-Q101 qualified parts for automotive or mission-critical applications requiring documented reliability assurance.

Q: Are all substitute parts available in the same packaging format?

A: Most substitutes use TO-220-3 package matching SR1660. Exception: SR1660PT C0G uses TO-247-3 package. All parts are through-hole mounted. Verify PCB footprint compatibility before final selection, as TO-220-3 and TO-247-3 have different lead spacing and hole patterns.

Q: What is the impact of forward voltage variation among substitutes?

A: Forward voltage affects voltage drop across the diode during conduction. SR1660 specifies 700 mV @ 8A. Substitutes range from 610 mV (MBR40L60CTG @ 20A) to 750 mV (MBR1560CT-E3/45 @ 7.5A, MBR2560CT-E3/45 @ 15A). Lower forward voltage reduces power dissipation and heat generation; higher voltage increases losses. Recalculate power dissipation and thermal performance when forward voltage differs significantly from original specification.

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