DSA30C45PB Equivalent & Substitute Parts

Part Overview

The DSA30C45PB is an IXYS Schottky diode array in TO-220-3 package configuration, rated for 45 V DC reverse voltage and 15 A average rectified current per diode. The device features a 1 Pair Common Cathode configuration with fast recovery characteristics (≤500 ns) and is classified as Active product status with ROHS3 compliance.

Substitute parts are necessary when the DSA30C45PB reaches end-of-life, experiences supply constraints, or when design requirements permit alternative manufacturers offering equivalent electrical and mechanical specifications within the same package family.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	45	V
Current - Average Rectified (Io) (per Diode)	15	A
Voltage - Forward (Vf) (Max) @ If	750 mV @ 15 A	mV
Technology	Schottky	—
Diode Configuration	1 Pair Common Cathode	—
Speed	Fast Recovery ≤500 ns, >200 mA (Io)	—
Current - Reverse Leakage @ Vr	300 µA @ 45 V	µA
Operating Temperature - Junction	-55°C to 175°C	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the DSA30C45PB is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 45 V
Current - Average Rectified (Io) (per Diode): Must equal or exceed 15 A
Diode Configuration: Must be 1 Pair Common Cathode
Technology: Schottky or Super Barrier acceptable
Package / Case: TO-220-3 or compatible TO-220 variant
Speed: Fast Recovery ≤500 ns, >200 mA (Io)
Mounting Type: Through Hole

Secondary Compliance Parameters:

RoHS Status: ROHS3 Compliant required
Operating Temperature Range: Must support -55°C minimum and 175°C maximum or equivalent industrial range

Substitute parts are grouped into three categories based on current rating alignment:

Category A - Full Current Match (15 A): Parts with identical 15 A current rating and 45 V voltage rating provide direct electrical equivalence.

Category B - Higher Current Rating (≥15 A): Parts rated above 15 A at 45 V provide superior current handling capability and are electrically compatible for applications requiring the DSA30C45PB.

Category C - Lower Current Rating (<15 A): Parts rated below 15 A are listed for reference only and are not suitable substitutes for applications requiring full 15 A operation.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (per Diode) A	Vf (Max) @ If mV	Reverse Leakage @ Vr µA	Tj (Min-Max) °C	Package	Status
DSA30C45PB	IXYS	45	15	750 @ 15 A	300 @ 45 V	-55 to 175	TO-220-3	Active
MBR1545CTG	onsemi	45	7.5	840 @ 15 A	100 @ 45 V	-65 to 175	TO-220-3	Active
MBR20L45CTG	onsemi	45	10	500 @ 10 A	500 @ 45 V	-55 to 150	TO-220-3	Obsolete
MBR2545CTG	onsemi	45	15	620 @ 15 A	200 @ 45 V	-65 to 175	TO-220-3	Active
MBR2550CT	Diodes Incorporated	50	15	750 @ 15 A	1000 @ 50 V	-65 to 150	TO-220-3	Obsolete
MBR3045CT-BP	Micro Commercial Co	45	15	700 @ 15 A	200 @ 45 V	-55 to 150	TO-220-3	Active
MBR60L45CTG	onsemi	45	30	550 @ 30 A	1200 @ 45 V	-65 to 175	TO-220-3	Active
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
SBR2045CT-G	Diodes Incorporated	45	10	540 @ 10 A	500 @ 45 V	-65 to 150	TO-220-3	Active

Engineering Selection Recommendations

Recommended Primary Substitutes (Active Status, Full 15 A Rating):

MBR2545CTG (onsemi SWITCHMODE™ Series): Active product status with 45 V / 15 A rating. Forward voltage of 620 mV @ 15 A provides improved efficiency compared to DSA30C45PB (750 mV). Operating temperature range -65°C to 175°C matches or exceeds DSA30C45PB specifications. ROHS3 compliant. TO-220-3 package compatibility confirmed.
MBR3045CT-BP (Micro Commercial Co): Active product status with 45 V / 15 A rating. Forward voltage of 700 mV @ 15 A is within 50 mV of DSA30C45PB. Reverse leakage of 200 µA @ 45 V is lower than DSA30C45PB (300 µA), indicating superior leakage characteristics. ROHS3 compliant. TO-220-3 package (TO-220AB variant) compatible.
MBRP1545NTU (Fairchild Semiconductor): Active product status with 45 V / 15 A rating. Forward voltage of 800 mV @ 15 A is within acceptable tolerance. Operating temperature range -65°C to 150°C covers DSA30C45PB minimum requirement. ROHS3 compliant. TO-220-3 package compatible.
MBRP3045NTU (Fairchild Semiconductor): Active product status with 45 V / 15 A rating. Forward voltage of 650 mV @ 15 A provides improved efficiency. Operating temperature range -65°C to 150°C covers DSA30C45PB minimum requirement. ROHS3 compliant. TO-220-3 package compatible.

Higher Current Capability Substitute (Active Status, 30 A Rating):

MBR60L45CTG (onsemi SWITCHMODE™ Series): Active product status with 45 V / 30 A rating provides 2× current capacity. Forward voltage of 550 mV @ 30 A indicates superior efficiency at higher currents. Operating temperature range -65°C to 175°C exceeds DSA30C45PB specifications. ROHS3 compliant. TO-220-3 package compatible. Suitable for applications requiring higher current margin or thermal headroom.

Obsolete Status Parts (Not Recommended for New Designs):

MBR20L45CTG, MBR2550CT: Marked as Obsolete product status. Not suitable for new design implementations or long-term supply assurance.

Frequently Asked Questions (FAQ)

Q1: Can MBR1545CTG (7.5 A) substitute for DSA30C45PB (15 A)?

A: No. MBR1545CTG is rated for 7.5 A average rectified current per diode, which is 50% of the DSA30C45PB requirement. This part does not meet the minimum current specification and will not function correctly in applications requiring 15 A operation.

Q2: Is MBR60L45CTG (30 A) a suitable substitute for DSA30C45PB (15 A)?

A: Yes. MBR60L45CTG meets all primary substitution criteria with 45 V voltage rating and 30 A current rating, which exceeds the 15 A requirement. The higher current rating provides additional design margin and thermal headroom. All compliance parameters (ROHS3, TO-220-3 package, fast recovery speed) are satisfied.

Q3: What is the difference between Schottky and Super Barrier technology in these parts?

A: Both technologies are acceptable for substitution. The input parameters specify Schottky technology for DSA30C45PB. Super Barrier diodes (SBR2045CT, SBR2045CT-G) offer comparable electrical performance with different forward voltage characteristics. Selection between technologies depends on application-specific efficiency requirements.

Q4: Why is MBR2550CT listed as Obsolete?

A: MBR2550CT carries Obsolete product status designation, indicating discontinued manufacturing and limited future availability. While electrical specifications (45 V / 15 A) are compatible, new designs should not incorporate obsolete parts. Use Active status alternatives such as MBR2545CTG or MBR3045CT-BP.

Q5: Are all substitute parts ROHS3 compliant?

A: All recommended substitute parts listed carry ROHS3 Compliant status. This ensures compatibility with environmental and regulatory requirements matching the DSA30C45PB specification.

Q6: What is the significance of forward voltage (Vf) differences between parts?

A: Forward voltage differences directly impact power dissipation and thermal performance. Lower Vf values (MBR2545CTG at 620 mV, MBR60L45CTG at 550 mV) result in reduced heat generation compared to DSA30C45PB (750 mV). Higher Vf values (MBRP1545NTU at 800 mV) increase power dissipation. Selection depends on thermal design constraints and efficiency requirements.

Q7: Can parts with lower operating temperature maximum (150°C vs 175°C) be used?

A: Parts with -55°C to 150°C range (MBR20L45CTG, MBR3045CT-BP, MBRP1545NTU, MBRP3045NTU, SBR2045CT, SBR2045CT-G) are acceptable if application junction temperature does not exceed 150°C. DSA30C45PB supports 175°C maximum, providing 25°C additional margin. Verify thermal design calculations before selecting lower-rated alternatives.

Q8: What does "1 Pair Common Cathode" configuration mean?

A: This indicates the diode array contains two diodes sharing a common cathode connection. All substitute parts maintain identical 1 Pair Common Cathode configuration, ensuring pin-compatible replacement in TO-220-3 package without circuit modification.

Q9: Why is reverse leakage current important in substitution?

A: Reverse leakage current affects standby power consumption and circuit performance at maximum rated voltage. DSA30C45PB specifies 300 µA @ 45 V. Lower leakage values (MBR2545CTG at 200 µA, MBR3045CT-BP at 200 µA) provide superior performance. Higher values (MBR2550CT at 1000 µA, MBRP1545NTU at 1000 µA) may impact low-power applications.

Q10: Is packaging variant TO-220AB compatible with TO-220-3?

A: Yes. MBR3045CT-BP uses TO-220AB package variant, which is mechanically and electrically compatible with TO-220-3 footprint. Both variants maintain identical pin configuration and thermal characteristics for through-hole mounting applications.

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