DSA20C45PB Equivalent & Substitute Parts

Part Overview

The DSA20C45PB is a Schottky diode array manufactured by IXYS, configured as 1 pair common cathode with a maximum reverse voltage of 45 V and average rectified current of 10 A per diode. The device is packaged in TO-220-3 through-hole configuration and is currently in active product status with 6385 pieces in stock. This part is ROHS3 compliant and suitable for fast recovery rectification applications requiring low forward voltage drop and rapid switching characteristics.

Equivalent and substitute parts are identified based on matching or exceeding the electrical specifications and maintaining compatible mechanical packaging, allowing for direct or near-direct replacement in circuit designs.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	45	V
Current - Average Rectified (Io) (per Diode)	10	A
Voltage - Forward (Vf) (Max) @ If	750 mV @ 10 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	200	µA @ 45 V
Operating Temperature - Junction	-55 to 175	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the DSA20C45PB are grouped based on the following substitution criteria:

Primary Substitution Parameters:

Diode Configuration: 1 Pair Common Cathode (mandatory match)
Technology: Schottky or Super Barrier (functionally equivalent fast recovery rectifiers)
Voltage - DC Reverse (Vr) (Max): Equal to or greater than 45 V
Current - Average Rectified (Io) (per Diode): Equal to or greater than 10 A
Mounting Type: Through Hole (mandatory match)
Package / Case: TO-220-3 (mandatory match)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (mandatory match)

Compliance Parameters:

RoHS Status: ROHS3 Compliant (preferred)
Product Status: Active or Obsolete (both acceptable; obsolete parts noted where applicable)

Parts are classified as direct equivalents when all primary parameters match or exceed the main part specifications. Parts with higher current ratings or voltage ratings remain compatible as they operate within the same electrical class and mechanical envelope.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (per Diode) A	Vf (Max) mV	Reverse Leakage µA	Tj (°C)	Package	Product Status	RoHS
DSA20C45PB	IXYS	45	10	750 @ 10 A	200 @ 45 V	-55 to 175	TO-220-3	Active	ROHS3
MBR2060CT_T0_00001	Panjit International Inc.	60	20	750 @ 10 A	50 @ 60 V	-65 to 175	TO-220-3	Active	ROHS3
MBR1545CTG	onsemi	45	7.5	840 @ 15 A	100 @ 45 V	-65 to 175	TO-220-3	Active	ROHS3
MBR20L45CTG	onsemi	45	10	500 @ 10 A	500 @ 45 V	-55 to 150	TO-220-3	Obsolete	ROHS3
MBR2545CTG	onsemi	45	15	620 @ 15 A	200 @ 45 V	-65 to 175	TO-220-3	Active	ROHS3
MBR2550CT	Diodes Incorporated	50	15	750 @ 15 A	1000 @ 50 V	-65 to 150	TO-220-3	Obsolete	ROHS3
MBR3045CT-BP	Micro Commercial Co	45	15	700 @ 15 A	200 @ 45 V	-55 to 150	TO-220-3	Active	ROHS3
MBR60L45CTG	onsemi	45	30	550 @ 30 A	1200 @ 45 V	-65 to 175	TO-220-3	Active	ROHS3
MBRP1545NTU	Fairchild Semiconductor	45	15	800 @ 15 A	1000 @ 45 V	-65 to 150	TO-220-3	Active	—
MBRP3045NTU	Fairchild Semiconductor	45	15	650 @ 15 A	1000 @ 45 V	-65 to 150	TO-220-3	Active	—
SBR2045CT	Diodes Incorporated	45	10	540 @ 10 A	500 @ 45 V	-65 to 150	TO-220-3	Active	ROHS3

Engineering Selection Recommendations

Direct Equivalents (Matching Specifications):

MBR20L45CTG (onsemi) and SBR2045CT (Diodes Incorporated) are direct electrical equivalents to the DSA20C45PB, both providing 45 V reverse voltage and 10 A average rectified current per diode in TO-220-3 packaging. MBR20L45CTG is marked as obsolete; however, it remains available in inventory. SBR2045CT is active and ROHS3 compliant, making it the preferred direct replacement. SBR2045CT uses Super Barrier technology instead of Schottky, delivering superior forward voltage characteristics (540 mV vs. 750 mV at 10 A).

Higher Current Capacity Substitutes (Uprating):

MBR2545CTG (onsemi), MBR3045CT-BP (Micro Commercial Co), MBRP1545NTU, and MBRP3045NTU provide 15 A average rectified current per diode while maintaining 45 V reverse voltage and TO-220-3 packaging. These parts are suitable for applications requiring higher current handling without voltage derating. MBR2545CTG and MBR3045CT-BP are ROHS3 compliant and active. MBRP1545NTU and MBRP3045NTU are active but lack explicit RoHS certification documentation in the provided data.

Higher Voltage Capacity Substitutes (Uprating):

MBR2060CT_T0_00001 (Panjit International Inc.) provides 60 V reverse voltage and 20 A average rectified current per diode, offering both voltage and current margin. This part is active and ROHS3 compliant, suitable for applications requiring enhanced overvoltage protection.

Higher Current Capacity with Voltage Match:

MBR60L45CTG (onsemi) provides 30 A average rectified current per diode at 45 V reverse voltage, offering maximum current capacity within the 45 V class. This part is active and ROHS3 compliant.

Obsolete Parts:

MBR1545CTG (onsemi) provides only 7.5 A average rectified current per diode, below the 10 A requirement of the main part, and is therefore not suitable as a substitute. MBR2550CT (Diodes Incorporated) is marked obsolete and has higher reverse leakage (1 mA vs. 200 µA), making it less desirable despite adequate voltage and current ratings.

Compliance Considerations:

All recommended active substitutes maintain ROHS3 compliance and EAR99 export classification. Parts without explicit RoHS certification (MBRP1545NTU, MBRP3045NTU) should be verified for compliance requirements in specific applications.

Frequently Asked Questions (FAQ)

Q: Can MBR2060CT_T0_00001 replace DSA20C45PB in all applications?

A: MBR2060CT_T0_00001 is electrically compatible as a substitute. It provides higher voltage (60 V vs. 45 V) and higher current (20 A vs. 10 A) ratings, making it suitable for applications where the DSA20C45PB is used. The higher ratings provide additional design margin. However, verify that the circuit design does not depend on the specific forward voltage or reverse leakage characteristics of the original part, as these differ slightly.

Q: What is the difference between Schottky and Super Barrier technology in SBR2045CT?

A: Both Schottky and Super Barrier are fast recovery rectifier technologies suitable for the same applications. SBR2045CT uses Super Barrier technology, which delivers lower forward voltage (540 mV vs. 750 mV at 10 A) compared to the DSA20C45PB Schottky design. This results in reduced power dissipation and improved efficiency. Both technologies maintain the same fast recovery speed (≤ 500ns) and are compatible in TO-220-3 packaging.

Q: Why is MBR1545CTG not recommended as a substitute?

A: MBR1545CTG provides only 7.5 A average rectified current per diode, which is below the 10 A specification of the DSA20C45PB. Using this part would result in current derating and potential thermal stress in applications designed for 10 A operation. It is not suitable as a direct substitute.

Q: Are obsolete parts acceptable for new designs?

A: Obsolete parts such as MBR20L45CTG and MBR2550CT remain available in current inventory but are no longer in active production. For new designs, active parts are preferred to ensure long-term supply chain stability. Obsolete parts may be used for legacy system repairs or maintenance where supply is confirmed.

Q: What packaging considerations apply to these substitutes?

A: All listed substitute parts use TO-220-3 through-hole packaging, matching the DSA20C45PB mechanical envelope. Supplier device package designations (TO-220, TO-220AB, TO-220-3) refer to minor variations in lead configuration and tape-and-reel specifications but maintain mechanical and electrical compatibility in through-hole PCB mounting. Verify lead spacing and mounting hole alignment with your PCB design.

Q: Can I use MBR2545CTG or MBR3045CT-BP if my circuit only requires 10 A?

A: Yes. MBR2545CTG and MBR3045CT-BP provide 15 A average rectified current per diode, exceeding the 10 A requirement. Operating these parts at 10 A results in reduced thermal stress and improved reliability margins. Both parts maintain 45 V reverse voltage matching the DSA20C45PB and are ROHS3 compliant and active.

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

A: Reverse leakage current affects power dissipation and circuit performance at high temperatures or high reverse voltages. The DSA20C45PB specifies 200 µA at 45 V. SBR2045CT specifies 500 µA, while MBR2060CT_T0_00001 specifies only 50 µA. Lower reverse leakage reduces standby power consumption and heat generation. For most applications, these differences are negligible; however, precision analog circuits or high-temperature environments may require verification.

Q: Are there any temperature range limitations when substituting parts?

A: The DSA20C45PB operates from -55°C to 175°C. Most substitute parts extend the lower temperature limit to -65°C, providing improved cold-temperature performance. Some obsolete parts (MBR20L45CTG, MBR2550CT, MBRP1545NTU, MBRP3045NTU) limit the upper temperature to 150°C. If your application requires operation above 150°C, verify that the substitute part supports the full -55°C to 175°C range or confirm that your circuit operates within the substitute part's temperature limits.

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