VT2045CHM3/4W Equivalent & Substitute Parts

Part Overview

The VT2045CHM3/4W is a Schottky diode array with 1 pair common cathode configuration, rated for 45 V DC reverse voltage and 10 A average rectified current per diode. Manufactured by Vishay General Semiconductor - Diodes Division, this component is packaged in TO-220-3 through-hole format and qualified to AEC-Q101 automotive standards.

The VT2045CHM3/4W is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this diode array.

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	580 mV @ 10 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	2	mA @ 45 V
Operating Temperature - Junction	-40 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the VT2045CHM3/4W are grouped based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Critical Parameters for Substitution:

Diode configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage rating: 45 V DC reverse
Current rating: 10 A average rectified (minimum)
Forward voltage: ≤ 600 mV @ rated current
Reverse leakage: ≤ 2 mA @ 45 V
Speed: Fast Recovery ≤ 500ns
Operating temperature range: -40°C to 150°C (minimum)
Mounting type: Through Hole
Package: TO-220-3 or equivalent footprint

Grouping Categories:

Group 1: Direct Parametric Equivalents (Through-Hole TO-220-3) Parts with identical electrical specifications and through-hole TO-220-3 packaging. These provide direct form-factor replacement.

Group 2: Manufacturer Recommended Alternatives (Through-Hole TO-220-3) Active production parts from alternative manufacturers meeting all electrical and mechanical requirements with confirmed automotive qualification.

Group 3: Higher Current Rating Alternatives (Through-Hole TO-220-3) Parts rated for 15 A or higher current capacity, maintaining all other electrical specifications. These provide enhanced current handling capability while preserving voltage and thermal characteristics.

Group 4: Surface Mount Alternative (SlimDPAK) Part with identical electrical specifications but surface-mount packaging. Substitution requires PCB redesign and assembly process modification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io (per Diode) [A]	Vf (Max) @ If [mV]	Ir @ Vr [mA]	Tj (Max) [°C]	Package	Product Status	AEC-Q101
VT2045CHM3/4W	Vishay	45	10	580 @ 10 A	2 @ 45 V	150	TO-220-3	Obsolete	Yes
VT2045C-M3/4W	Vishay	45	10	580 @ 10 A	2 @ 45 V	150	TO-220-3	Active	Yes
VT2045CBP-M3/4W	Vishay	45	10	580 @ 10 A	2 @ 45 V	200	TO-220-3	Active	No
VT2060G-M3/4W	Vishay	45	10	580 @ 10 A	2 @ 45 V	150	TO-220-3	Active	Yes
STPS2045CT	STMicroelectronics	45	10	570 @ 10 A	0.1 @ 45 V	175	TO-220-3	Active	No
STPS30L45CT	STMicroelectronics	45	15	550 @ 15 A	0.4 @ 45 V	150	TO-220-3	Active	No
DST2045C	Littelfuse Inc.	45	10	580 @ 10 A	2 @ 45 V	150	TO-220-3	Active	No
ST2045C	SMC Diode Solutions	45	10	580 @ 10 A	2 @ 45 V	150	TO-220-3	Active	No
V20PW45CHM3/I	Vishay	45	10	600 @ 10 A	1 @ 45 V	150	TO-252-3 (SlimDPAK)	Active	Yes

Engineering Selection Recommendations

For Direct Replacement (Through-Hole TO-220-3, No PCB Redesign):

VT2045C-M3/4W is the primary recommended substitute. This part is manufactured by Vishay General Semiconductor - Diodes Division, maintains identical electrical specifications to the obsolete VT2045CHM3/4W, is qualified to AEC-Q101 automotive standards, and is in active production status with confirmed inventory availability (8438 pcs).

VT2045CBP-M3/4W is an alternative from Vishay with identical electrical performance and higher maximum junction temperature (200°C). This part is in active production but does not carry AEC-Q101 qualification.

VT2060G-M3/4W is an active production alternative from Vishay with identical electrical specifications and AEC-Q101 qualification. This part provides equivalent performance with confirmed supply availability (975 pcs).

For Cross-Manufacturer Substitution (Through-Hole TO-220-3):

STPS2045CT from STMicroelectronics meets all electrical requirements with slightly lower forward voltage (570 mV vs. 580 mV) and significantly lower reverse leakage (100 µA vs. 2 mA). This part is in active production with high inventory (25100 pcs) but does not carry AEC-Q101 qualification.

DST2045C from Littelfuse Inc. provides identical electrical specifications and is in active production (946 pcs). This part does not carry AEC-Q101 qualification.

ST2045C from SMC Diode Solutions provides identical electrical specifications and is in active production (1944 pcs). This part does not carry AEC-Q101 qualification but is REACH Affected.

For Enhanced Current Capacity (Through-Hole TO-220-3):

STPS30L45CT from STMicroelectronics is rated for 15 A average rectified current, providing 50% higher current capacity than the original specification. This part maintains 45 V voltage rating and fast recovery characteristics. It is in active production (5404 pcs) but does not carry AEC-Q101 qualification.

For Surface Mount Applications (Requires PCB Redesign):

V20PW45CHM3/I from Vishay is a surface-mount alternative in SlimDPAK (TO-252-3) packaging with identical electrical specifications, AEC-Q101 qualification, and active production status (1035 pcs). Substitution requires PCB layout modification and assembly process change from through-hole to surface-mount soldering.

Frequently Asked Questions (FAQ)

Q: Can VT2045C-M3/4W directly replace VT2045CHM3/4W without any modifications?

A: Yes. VT2045C-M3/4W is a direct replacement. Both parts share identical electrical specifications (45 V, 10 A, 580 mV forward voltage), the same TO-220-3 through-hole package, AEC-Q101 qualification, and automotive grade rating. No circuit modifications or PCB redesign is required. The primary difference is product status: VT2045CHM3/4W is obsolete while VT2045C-M3/4W is in active production.

Q: What is the difference between VT2045C-M3/4W and VT2045CBP-M3/4W?

A: Both parts are manufactured by Vishay and share identical electrical specifications (45 V, 10 A, 580 mV forward voltage, 2 mA reverse leakage). The key difference is maximum junction temperature: VT2045C-M3/4W is rated to 150°C while VT2045CBP-M3/4W is rated to 200°C. VT2045C-M3/4W carries AEC-Q101 qualification; VT2045CBP-M3/4W does not. Selection depends on thermal requirements and qualification mandates for your application.

Q: Can I use STPS2045CT as a substitute?

A: Yes, with engineering review. STPS2045CT from STMicroelectronics meets all critical electrical parameters: 45 V voltage rating, 10 A current rating, fast recovery speed, and TO-220-3 through-hole package. Forward voltage is slightly lower (570 mV vs. 580 mV) and reverse leakage is significantly lower (100 µA vs. 2 mA), both favorable characteristics. However, STPS2045CT does not carry AEC-Q101 qualification. If your application requires AEC-Q101 certification, this part is not suitable. If certification is not mandated, STPS2045CT is electrically compatible with high inventory availability.

Q: Why would I choose STPS30L45CT over other substitutes?

A: STPS30L45CT is selected when higher current capacity is required. This part is rated for 15 A average rectified current compared to 10 A for the original VT2045CHM3/4W. All other electrical specifications remain compatible: 45 V voltage rating, fast recovery speed, and TO-220-3 through-hole package. STPS30L45CT is appropriate for designs requiring enhanced current handling while maintaining the same voltage class and package form factor. This part does not carry AEC-Q101 qualification.

Q: What are the implications of switching to V20PW45CHM3/I?

A: V20PW45CHM3/I is a surface-mount alternative in SlimDPAK (TO-252-3) packaging. Electrical specifications are identical to VT2045CHM3/4W, and it carries AEC-Q101 qualification. However, substitution requires significant PCB redesign: through-hole mounting pads must be replaced with surface-mount pads, and assembly process must change from through-hole soldering to surface-mount reflow soldering. This substitution is appropriate only when PCB redesign is feasible and surface-mount assembly capability is available.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (VT2045C-M3/4W, VT2045CBP-M3/4W, VT2060G-M3/4W, STPS2045CT, STPS30L45CT, DST2045C, ST2045C, and V20PW45CHM3/I) are RoHS3 compliant. The original VT2045CHM3/4W is also RoHS3 compliant.

Q: Which substitute has the best reverse leakage performance?

A: V20PW45CHM3/I has the lowest reverse leakage at 1 mA @ 45 V. STPS2045CT and STPS30L45CT have significantly lower reverse leakage (100 µA and 400 µA respectively) compared to the original specification of 2 mA. Lower reverse leakage reduces standby current and improves efficiency in power conversion applications.

Q: Can I mix different substitute parts in the same design?

A: All listed substitutes maintain identical diode configuration (1 Pair Common Cathode), voltage rating (45 V), and current rating (10 A minimum). They are electrically interchangeable from a circuit perspective. However, mixing different manufacturers or part numbers in production is not recommended without formal design documentation and supply chain approval. Maintain consistency within a single design revision.

Q: What is the inventory status for each substitute?

A: VT2045C-M3/4W: 8438 pcs; VT2045CBP-M3/4W: 704 pcs; VT2060G-M3/4W: 975 pcs; STPS2045CT: 25100 pcs; STPS30L45CT: 5404 pcs; DST2045C: 946 pcs; ST2045C: 1944 pcs; V20PW45CHM3/I: 1035 pcs. STPS2045CT has the highest inventory availability.

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