SUR1560 Equivalent & Substitute Parts

Part Overview

The SUR1560 is a general-purpose rectifier diode rated for 600 V DC reverse voltage in a through-hole TO-220AC package. This component is classified as obsolete, which necessitates identification of active equivalent parts for continued system support and new designs. The SUR1560 features fast recovery characteristics with a reverse recovery time of 50 ns, making it suitable for standard rectification applications requiring moderate switching speeds.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	600 V
Voltage - Forward (Vf) (Max) @ If	2.4 V @ 15 A
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	5 µA @ 600 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type	Through Hole
Package / Case	TO-220-2
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the obsolete SUR1560 is based on electrical and mechanical parameter compatibility within the general-purpose rectifier diode category. The primary substitution criteria are:

Electrical Compatibility:

Identical DC reverse voltage rating (600 V)
Fast recovery speed classification (≤ 500ns, > 200mA)
Identical reverse recovery time (50 ns)
Compatible forward voltage characteristics at rated current

Mechanical Compatibility:

Identical through-hole mounting type
Identical TO-220-2 package configuration
Identical TO-220AC supplier device package

Regulatory Compliance:

ROHS3 compliance maintained
REACH affected status consistent
EAR99 ECCN classification maintained

The SDUR1560 meets all substitution criteria as an active product with identical voltage ratings, package configuration, and regulatory compliance status.

Parameter Comparison

Parameter	SUR1560 (Main Part)	SDUR1560 (Substitute)	Compatibility
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	Identical
Voltage - Forward (Vf) (Max) @ If	2.4 V @ 15 A	1.7 V @ 15 A	Compatible (Lower Vf)
Reverse Recovery Time (trr)	50 ns	50 ns	Identical
Current - Reverse Leakage @ Vr	5 µA @ 600 V	10 µA @ 600 V	Compatible (Within tolerance)
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Identical
Mounting Type	Through Hole	Through Hole	Identical
Package / Case	TO-220-2	TO-220-2	Identical
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 175°C	Compatible (Extended range)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Identical
Product Status	Obsolete	Active	Upgrade to active part

Engineering Selection Recommendations

The SDUR1560 is the direct substitute for the obsolete SUR1560. Selection of the SDUR1560 is based on the following engineering factors:

Product Status: The SDUR1560 is an active product with current manufacturing support, whereas the SUR1560 is obsolete. This ensures long-term availability and supply chain continuity.

Electrical Performance: The SDUR1560 maintains identical voltage ratings (600 V DC reverse) and switching characteristics (50 ns reverse recovery time). The lower forward voltage (1.7 V versus 2.4 V at 15 A) represents an improvement in efficiency with no negative impact on circuit operation.

Regulatory Compliance: Both parts maintain ROHS3 compliance, REACH affected status, and EAR99 ECCN classification, ensuring regulatory requirements are met in all applications.

Thermal Performance: The SDUR1560 offers an extended operating temperature range (-55°C to 175°C versus -55°C to 150°C), providing additional margin for thermal management in demanding applications.

Package Compatibility: Identical TO-220-2 package and TO-220AC supplier device package ensure direct mechanical and electrical compatibility without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the SDUR1560 be used as a direct replacement for the SUR1560 without circuit modifications?

A: Yes. The SDUR1560 is electrically and mechanically compatible with the SUR1560. Both parts share identical voltage ratings, package configuration, and switching characteristics. No circuit modifications are required.

Q: What is the significance of the lower forward voltage in the SDUR1560?

A: The SDUR1560 exhibits a forward voltage of 1.7 V at 15 A compared to 2.4 V for the SUR1560. This represents improved efficiency and lower power dissipation in rectification circuits. This characteristic is beneficial and does not compromise compatibility.

Q: Are there any thermal considerations when substituting the SDUR1560 for the SUR1560?

A: The SDUR1560 supports an extended junction temperature range of -55°C to 175°C, compared to -55°C to 150°C for the SUR1560. This provides additional thermal margin and is advantageous for applications operating at elevated temperatures.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the SUR1560 and SDUR1560 are ROHS3 compliant, REACH affected, and classified as EAR99 under ECCN. Regulatory compliance is maintained with the substitution.

Q: What is the difference in reverse leakage current between these parts?

A: The SDUR1560 has a reverse leakage current of 10 µA at 600 V, compared to 5 µA for the SUR1560. This difference is within acceptable tolerance for general-purpose rectifier applications and does not affect circuit functionality.

Q: Is the TO-220AC package identical between both parts?

A: Yes. Both parts use the TO-220-2 package configuration with TO-220AC supplier device package designation. The physical footprint and pin configuration are identical, enabling direct PCB compatibility.

Q: Why is the SUR1560 classified as obsolete?

A: The SUR1560 is no longer in active production. The SDUR1560 represents the current active equivalent with improved performance characteristics and continued manufacturing support.

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