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MBR2045CT-G1 Equivalent & Substitute Parts
Part Overview
The MBR2045CT-G1 is a Schottky diode array manufactured by Diodes Incorporated, configured as 1 pair common cathode with 45V reverse voltage rating and 10A average rectified current per diode. The component is packaged in TO-220-3 through-hole format and qualified to AEC-Q101 automotive standards.
The MBR2045CT-G1 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. Active alternatives with identical or compatible electrical and mechanical parameters are available from multiple manufacturers.
Substiute Parts
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 | 640 mV @ 10 A | — |
| Speed | Fast Recovery ≤ 500ns, > 200mA (Io) | — |
| Current - Reverse Leakage @ Vr | 100 µA @ 45 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 MBR2045CT-G1 is determined by the following critical parameters:
Mandatory Matching Parameters:
- Diode Configuration: 1 Pair Common Cathode
- Technology: Schottky
- Voltage - DC Reverse (Vr) (Max): 45 V
- Current - Average Rectified (Io) (per Diode): 10 A minimum
- Mounting Type: Through Hole
- Package / Case: TO-220-3
Allowable Variation Parameters:
- Voltage - Forward (Vf) (Max) @ If: Acceptable range 510 mV to 790 mV at rated current
- Current - Reverse Leakage @ Vr: Acceptable range 2 µA to 900 µA at 45 V
- Operating Temperature - Junction: Acceptable range -55°C to 150°C minimum; extended to 175°C acceptable
- Grade and Qualification: Automotive grade with AEC-Q101 preferred; non-automotive acceptable for non-critical applications
- RoHS and REACH Status: ROHS3 Compliant required; REACH status variation acceptable
Substitute parts are grouped into two categories:
Category 1: Direct Parametric Equivalents (10A Rating) Parts with identical 10A current rating and matching all mandatory parameters. These provide direct replacement capability with minimal design impact.
Category 2: Higher Current Rated Alternatives (15A and 30A Ratings) Parts with 15A or 30A current ratings that exceed the 10A requirement. These provide enhanced current handling capability and are suitable for applications requiring design margin or future capacity expansion.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Product Status | Io (per Diode) | Vf (Max) @ If | Reverse Leakage @ 45V | Tj (Operating) | Grade | Qualification |
|---|---|---|---|---|---|---|---|---|
| MBR2045CT-G1 | Diodes Incorporated | Obsolete | 10 A | 640 mV @ 10 A | 100 µA | -55°C ~ 150°C | Automotive | AEC-Q101 |
| MBR2045CT-LJ-01 | Diodes Incorporated | Active | 10 A | 640 mV @ 10 A | 100 µA | -55°C ~ 150°C | Automotive | AEC-Q101 |
| DSA20C45PB | IXYS | Active | 10 A | 750 mV @ 10 A | 200 µA | -55°C ~ 175°C | — | — |
| DSA30C45PB | IXYS | Active | 15 A | 750 mV @ 15 A | 300 µA | -55°C ~ 175°C | — | — |
| DSA60C45PB | IXYS | Active | 30 A | 790 mV @ 30 A | 900 µA | -55°C ~ 175°C | — | — |
| DSB30C45PB | IXYS | Active | 15 A | 590 mV @ 15 A | 10 mA | -55°C ~ 150°C | — | — |
| DSB60C45PB | IXYS | Active | 30 A | 630 mV @ 30 A | 10 mA | -55°C ~ 150°C | — | — |
| DSSK20-0045A | IXYS | Active | 10 A | 680 mV @ 10 A | 300 µA | -55°C ~ 175°C | — | — |
| DSSK20-0045B | IXYS | Active | 10 A | 510 mV @ 10 A | 5 mA | -55°C ~ 150°C | — | — |
| DSSK28-0045A | IXYS | Active | 15 A | 670 mV @ 15 A | 500 µA | -55°C ~ 175°C | — | — |
| DST2045C | Littelfuse Inc. | Active | 10 A | 580 mV @ 10 A | 2 mA | -55°C ~ 150°C | — | — |
Engineering Selection Recommendations
Primary Recommendation: MBR2045CT-LJ-01
The MBR2045CT-LJ-01 from Diodes Incorporated is the preferred direct substitute. This part maintains identical electrical specifications, automotive grade qualification, and AEC-Q101 certification. The part is in active production status with 5200 units in stock, ensuring supply continuity. Pinout and thermal characteristics are identical to the obsolete MBR2045CT-G1, enabling direct board-level replacement without design modification.
Secondary Recommendation: DST2045C
The DST2045C from Littelfuse Inc. provides an alternative 10A-rated option with active product status. This part meets all mandatory electrical parameters and maintains TO-220-3 through-hole packaging. Forward voltage is lower at 580 mV compared to the original 640 mV, resulting in reduced power dissipation. Reverse leakage is significantly lower at 2 µA. The part is available in tube packaging with 946 units in stock.
Higher Current Alternatives: DSA30C45PB, DSB30C45PB, DSSK28-0045A
These 15A-rated parts are suitable for applications requiring design margin or future current capacity expansion. All maintain 45V reverse voltage rating and TO-220-3 packaging. Selection among these options depends on forward voltage and leakage current requirements specific to the application.
Extended Temperature Capability: DSA20C45PB, DSA30C45PB, DSA60C45PB, DSSK20-0045A, DSSK28-0045A
These IXYS parts offer extended operating temperature range to 175°C, compared to the original 150°C maximum. These are suitable for high-temperature applications or environments with elevated ambient conditions.
Compliance Considerations:
All substitute parts listed maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating. The original MBR2045CT-G1 carries AEC-Q101 automotive qualification; substitute parts from IXYS and Littelfuse do not explicitly list this qualification in the provided data. For automotive applications requiring AEC-Q101 certification, the MBR2045CT-LJ-01 is the only qualified alternative.
Frequently Asked Questions (FAQ)
Q: Can the MBR2045CT-LJ-01 be used as a direct replacement for the MBR2045CT-G1?
A: Yes. The MBR2045CT-LJ-01 is a parametric equivalent with identical electrical specifications, package type, and automotive qualification. No circuit design changes are required. The part is pin-compatible and thermally equivalent.
Q: What is the difference between the 10A and 15A rated alternatives?
A: The 15A-rated parts (DSA30C45PB, DSB30C45PB, DSSK28-0045A) have higher average rectified current capability per diode. These parts are suitable for applications where the original 10A rating provides insufficient margin or where future design expansion is anticipated. All maintain the same 45V reverse voltage rating and TO-220-3 package.
Q: Are there differences in forward voltage between substitute options?
A: Yes. Forward voltage varies across substitutes at rated current. The MBR2045CT-LJ-01 matches the original at 640 mV @ 10A. The DST2045C is lower at 580 mV @ 10A, reducing power dissipation. The DSSK20-0045A is 680 mV @ 10A. Higher current-rated parts show forward voltage increases at their respective current ratings. Selection depends on thermal budget and efficiency requirements.
Q: What is the significance of reverse leakage current differences?
A: Reverse leakage current affects standby power consumption and thermal performance. The original MBR2045CT-G1 specifies 100 µA @ 45V. Substitutes range from 2 µA (DST2045C) to 900 µA (DSA60C45PB). Lower leakage reduces standby power; higher leakage increases thermal load. Selection depends on application duty cycle and thermal constraints.
Q: Can I use a 30A-rated part in place of the 10A original?
A: Yes, from an electrical standpoint. The 30A-rated parts (DSA60C45PB, DSB60C45PB) maintain 45V reverse voltage and TO-220-3 packaging. However, higher current-rated parts typically have different thermal characteristics and may occupy different board space. Verify thermal performance and mechanical fit before substitution.
Q: What is the difference between DSSK20-0045A and DSSK20-0045B?
A: Both are 10A-rated IXYS parts with identical package and voltage rating. The primary differences are forward voltage (680 mV vs. 510 mV @ 10A) and reverse leakage (300 µA vs. 5 mA @ 45V). The DSSK20-0045B has lower forward voltage and leakage, resulting in reduced power dissipation and standby current. The DSSK20-0045A offers extended temperature range to 175°C.
Q: Are all substitute parts RoHS compliant?
A: Yes. All substitute parts listed are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original MBR2045CT-G1.
Q: Which substitute is best for automotive applications?
A: The MBR2045CT-LJ-01 is the only substitute with explicit AEC-Q101 automotive qualification. For applications requiring automotive-grade certification, this part is the required choice. Other substitutes may be acceptable for non-critical automotive applications or where AEC-Q101 is not mandated by design specification.
Q: What is the difference between tube and non-specified packaging?
A: Tube packaging indicates the parts are supplied in plastic tubes for automated handling and assembly. Non-specified packaging may indicate alternative delivery formats. For high-volume production, confirm packaging compatibility with assembly equipment before design release.
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