MBR1045ULPS-TP Equivalent & Substitute Parts

Part Overview

The MBR1045ULPS-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 45 V DC reverse voltage and 10 A average rectified current in a TO-277-3 surface mount package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production support. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within acceptable parameter ranges for the 45 V, 10 A Schottky diode category.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	45	V
Current - Average Rectified (Io)	10	A
Voltage - Forward (Vf) (Max) @ If	470 mV @ 10 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	250	µA @ 45 V
Technology	Schottky	—
Mounting Type	Surface Mount	—
Package / Case	TO-277, 3-PowerDFN	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MBR1045ULPS-TP is determined by the following critical parameters:

Primary Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 45 V
Current - Average Rectified (Io): 10 A
Technology: Schottky or Super Barrier
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C minimum
RoHS3 Compliance and MSL 1 rating

Secondary Compatibility Factors:

Forward voltage (Vf) at 10 A: acceptable range 470–550 mV
Reverse leakage current: acceptable range 44–500 µA @ 45 V
Recovery speed: Fast Recovery (≤ 500ns) or Standard Recovery (> 500ns)
Package compatibility: TO-277-3 or PowerDI™ 5 formats

Parts are grouped into two categories: Direct Equivalents (identical specifications and active status) and Functional Substitutes (equivalent electrical performance with minor parameter variations or different package formats).

Parameter Comparison

Part Number	Manufacturer	Status	Technology	Vr (Max) [V]	Io [A]	Vf (Max) @ 10A [mV]	Reverse Leakage @ 45V [µA]	Speed	Package	Temp Range [°C]
MBR1045ULPS-TP	Micro Commercial Co	Obsolete	Schottky	45	10	470	250	Fast Recovery ≤ 500ns	TO-277-3	-55 to 150
MBR10U45L-TP	Micro Commercial Co	Active	Schottky	45	10	470	500	Fast Recovery ≤ 500ns	TO-277-3	-55 to 150
FSV1045V	onsemi	Not For New Designs	Schottky	45	10	440	220	Fast Recovery ≤ 500ns	TO-277-3	-55 to 150
PMEG045T050EPDZ	Nexperia USA Inc.	Active	Schottky	45	5	465	44	Fast Recovery ≤ 500ns	TO-277-3	-55 to 175
SBR1045SP5-13	Diodes Incorporated	Active	Super Barrier	45	10	550	450	Fast Recovery ≤ 500ns	PowerDI™ 5	-65 to 150
SBR1045SP5Q-13	Diodes Incorporated	Active	Super Barrier	45	10	550	450	Fast Recovery ≤ 500ns	PowerDI™ 5	-65 to 150
SBR10A45SP5-13	Diodes Incorporated	Active	Super Barrier	45	10	530	400	Fast Recovery ≤ 500ns	PowerDI™ 5	-65 to 150
SBR10A45SP5Q-13	Diodes Incorporated	Active	Super Barrier	45	10	530	400	Standard Recovery >500ns	PowerDI™ 5	-65 to 150
SBR10U45SP5-13	Diodes Incorporated	Active	Super Barrier	45	10	470	300	Fast Recovery ≤ 500ns	PowerDI™ 5	-65 to 150
SBR10U45SP5Q-13	Diodes Incorporated	Active	Super Barrier	45	10	470	300	Fast Recovery ≤ 500ns	PowerDI™ 5	-55 to 150
SS10P4HM3_A/H	Vishay General Semiconductor - Diodes Division	Active	Schottky	40	10	560	800	Fast Recovery ≤ 500ns	TO-277A (SMPC)	-55 to 150

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Replacement):

MBR10U45L-TP (Micro Commercial Co) is the direct active equivalent to MBR1045ULPS-TP. Both parts share identical electrical specifications (45 V, 10 A, 470 mV forward voltage, Fast Recovery ≤ 500ns), the same TO-277-3 package, and matching operating temperature range (-55°C to 150°C). MBR10U45L-TP is currently in active production status with 5400 units in stock. The only parameter difference is reverse leakage current (500 µA vs. 250 µA), which remains within acceptable operational limits for most applications. Both parts are ROHS3 compliant with MSL 1 rating.

Active Substitutes with Identical Current and Voltage Ratings:

SBR10U45SP5Q-13 (Diodes Incorporated) provides a Super Barrier technology alternative with 45 V, 10 A ratings, 470 mV forward voltage, and Fast Recovery characteristics. This part is AEC-Q101 qualified and carries active production status with 90,100 units in stock. The PowerDI™ 5 package differs from TO-277-3 but maintains surface mount compatibility. Operating temperature range is -55°C to 150°C, matching the original specification.

SBR10U45SP5-13 (Diodes Incorporated) offers similar specifications to SBR10U45SP5Q-13 with 25,200 units available. Both SBR variants are suitable for applications where Super Barrier technology and automotive qualification (AEC-Q101) are acceptable.

Substitutes with Acceptable Parameter Variations:

SBR10A45SP5-13 and SBR10A45SP5Q-13 (Diodes Incorporated) maintain 45 V, 10 A ratings with forward voltage of 530 mV and reverse leakage of 400 µA. These parts are active with AEC-Q101 qualification. SBR10A45SP5Q-13 operates at Standard Recovery (> 500ns) versus Fast Recovery, which may impact switching performance in high-frequency applications.

FSV1045V (onsemi) is classified as "Not For New Designs" and should not be selected for new product development despite active inventory (12,315 units). This part exhibits superior forward voltage (440 mV) and lower reverse leakage (220 µA) but its design status precludes recommendation.

Limited Substitution Option:

PMEG045T050EPDZ (Nexperia USA Inc.) is rated for 5 A average rectified current, which is insufficient for the 10 A requirement of the original part. This device is suitable only for applications where current demand does not exceed 5 A. It offers superior reverse leakage (44 µA) and extended junction temperature rating (175°C maximum).

SS10P4HM3_A/H (Vishay) is rated for 40 V maximum reverse voltage, which is below the 45 V specification of the original part. This device is not suitable for direct substitution in circuits requiring full 45 V rating.

Frequently Asked Questions (FAQ)

Q: Can MBR10U45L-TP be used as a direct replacement for MBR1045ULPS-TP?

A: Yes. MBR10U45L-TP is the direct active equivalent. Both parts share identical voltage (45 V), current (10 A), forward voltage (470 mV @ 10 A), recovery speed (Fast Recovery ≤ 500ns), package (TO-277-3), and operating temperature range (-55°C to 150°C). The reverse leakage current difference (500 µA vs. 250 µA) does not prevent functional equivalence in standard rectifier applications.

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

A: Both technologies are fast-recovery rectifier diodes suitable for 45 V, 10 A applications. The parameter comparison table shows that Super Barrier devices (SBR series) typically exhibit higher forward voltage (530–550 mV) compared to Schottky devices (440–470 mV). Technology selection depends on application requirements for forward voltage drop and thermal dissipation characteristics.

Q: Are the SBR10U45SP5Q-13 and SBR10U45SP5-13 parts interchangeable?

A: Yes, for most applications. Both parts are rated 45 V, 10 A with 470 mV forward voltage and Fast Recovery characteristics. SBR10U45SP5Q-13 includes AEC-Q101 automotive qualification and operates at -55°C to 150°C. SBR10U45SP5-13 operates at -65°C to 150°C. The primary difference is packaging designation (Tape & Reel vs. Cut Tape & Digi-Reel®). Selection depends on supply chain requirements and temperature range specifications.

Q: Why is PMEG045T050EPDZ not recommended as a substitute?

A: PMEG045T050EPDZ is rated for 5 A average rectified current, while the original MBR1045ULPS-TP and most recommended substitutes are rated for 10 A. Using a 5 A device in a 10 A application will result in device overstress, reduced reliability, and potential failure. This part is suitable only for applications with maximum current requirements of 5 A or less.

Q: Can SS10P4HM3_A/H replace the MBR1045ULPS-TP?

A: No. SS10P4HM3_A/H is rated for 40 V maximum reverse voltage, which is below the 45 V specification of the original part. Using this device in circuits designed for 45 V operation creates risk of reverse voltage overstress and device failure. This part is not suitable for direct substitution.

Q: What is the significance of AEC-Q101 qualification on substitute parts?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. Parts carrying this qualification (SBR1045SP5-13, SBR1045SP5Q-13, SBR10A45SP5-13, SBR10A45SP5Q-13, SBR10U45SP5Q-13, and SS10P4HM3_A/H) have undergone rigorous testing for automotive applications. Selection of AEC-Q101 qualified parts is required for automotive and mission-critical applications. Non-automotive applications may use non-qualified alternatives.

Q: Does package format affect substitution compatibility?

A: Yes. The original MBR1045ULPS-TP uses TO-277-3 package. Substitute parts using PowerDI™ 5 package (SBR series) have different physical dimensions and PCB footprints. PCB layout modifications are required when switching between TO-277-3 and PowerDI™ 5 packages. Verify footprint compatibility with your circuit board design before substitution.

Q: Why is FSV1045V listed as "Not For New Designs"?

A: FSV1045V carries a product status designation of "Not For New Designs," indicating that the manufacturer (onsemi) has discontinued active development and support for this part. While inventory is currently available (12,315 units), new product designs should not incorporate this part. Use active-status alternatives such as MBR10U45L-TP or SBR10U45SP5Q-13 for new designs.

Q: What is the impact of forward voltage differences among substitute parts?

A: Forward voltage (Vf) determines the voltage drop across the diode during conduction. The original MBR1045ULPS-TP specifies 470 mV @ 10 A. Substitutes range from 440 mV (FSV1045V) to 560 mV (SS10P4HM3_A/H). Higher forward voltage results in greater power dissipation and heat generation. Applications with tight thermal budgets or high-frequency switching should prioritize substitutes with lower forward voltage (470 mV or less).

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All parts in the parameter comparison table are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. This ensures compatibility with modern manufacturing processes and environmental regulations.

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