STPS3045CFP Equivalent & Substitute Parts

Part Overview

The STPS3045CFP is a Schottky diode array manufactured by STMicroelectronics, configured as 1 pair common cathode with 45 V reverse voltage rating and 15 A average rectified current per diode. The device is packaged in TO-220-3 Full Pack through-hole configuration. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The STPS3045CFP remains in stock with 7629 units available as new original inventory.

Key Parameters

Parameter	Value
Manufacturer Part Number	STPS3045CFP
Manufacturer	STMicroelectronics
Category	Diodes, Rectifiers
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V
Current - Average Rectified (Io) (per Diode)	15 A
Voltage - Forward (Vf) (Max) @ If	570 mV @ 15 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	200 µA @ 45 V
Operating Temperature - Junction (Max)	200°C
Mounting Type	Through Hole
Package / Case	TO-220-3 Full Pack
Supplier Device Package	TO-220FP
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the STPS3045CFP is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): 45 V minimum
Current - Average Rectified (Io) (per Diode): 15 A minimum
Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Compatibility Requirements:

Mounting Type: Through Hole
Package / Case: TO-220-3 Full Pack or compatible variant

Regulatory Compliance:

RoHS3 Compliant
REACH Status: REACH Unaffected or REACH Affected (acceptable for substitution)
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts must meet or exceed the electrical specifications of the main part while maintaining mechanical compatibility with the through-hole TO-220-3 footprint. Forward voltage characteristics and reverse leakage current may vary within acceptable engineering tolerances for the application.

Parameter Comparison

Parameter	STPS3045CFP	STPS30L45CFP	MBRF3045CT	MBRF3045CTP	MBR3045CTF-E1	MBRF30L45CTG
Manufacturer	STMicroelectronics	STMicroelectronics	Taiwan Semiconductor Corporation	SMC Diode Solutions	Diodes Incorporated	onsemi
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	45 V	45 V	45 V	45 V
Current - Average Rectified (Io) (per Diode)	15 A	15 A	30 A	Not Specified	15 A	15 A
Voltage - Forward (Vf) (Max) @ If	570 mV @ 15 A	550 mV @ 15 A	820 mV @ 30 A	700 mV @ 15 A	700 mV @ 15 A	500 mV @ 15 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	200 µA @ 45 V	400 µA @ 45 V	200 µA @ 45 V	1 mA @ 45 V	100 µA @ 45 V	650 µA @ 45 V
Operating Temperature - Junction	200°C (Max)	150°C (Max)	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3 Full Pack	TO-220-3 Full Pack	TO-220-3 Full Pack, Isolated Tab	TO-220-3 Full Pack, Isolated Tab	TO-220-3 Full Pack	TO-220-3 Full Pack
Supplier Device Package	TO-220FP	TO-220FP	ITO-220AB	ITO-220AB	TO-220F-3	TO-220FP
Product Status	Obsolete	Active	Discontinued at DiGi Electronics	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Affected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Primary Substitute: STPS30L45CFP

The STPS30L45CFP from STMicroelectronics is the direct equivalent substitute for the STPS3045CFP. Both parts share identical electrical specifications (45 V reverse voltage, 15 A average rectified current, 1 pair common cathode configuration) and mechanical compatibility (TO-220-3 Full Pack through-hole). The STPS30L45CFP is classified as active product status, ensuring long-term availability and supply chain continuity. Forward voltage is marginally lower (550 mV vs. 570 mV @ 15 A), and reverse leakage current is higher (400 µA vs. 200 µA @ 45 V), both within acceptable engineering tolerances. RoHS3 compliance and REACH unaffected status match the original part. This substitute is recommended as the primary replacement option.

Secondary Substitute: MBR3045CTF-E1

The MBR3045CTF-E1 from Diodes Incorporated meets all critical electrical and mechanical requirements. It provides 45 V reverse voltage, 15 A average rectified current, and 1 pair common cathode configuration in a TO-220-3 Full Pack through-hole package. The part is active product status with established supply availability. Forward voltage is 700 mV @ 15 A, and reverse leakage current is 100 µA @ 45 V, both acceptable for the application. Operating temperature range extends to -65°C, providing enhanced low-temperature performance. RoHS3 compliance and REACH unaffected status are maintained. This substitute is suitable for applications requiring active product status and extended temperature range.

Tertiary Substitute: MBRF3045CTP

The MBRF3045CTP from SMC Diode Solutions is an active product with 45 V reverse voltage and 1 pair common cathode configuration in TO-220-3 Full Pack, Isolated Tab package. Forward voltage is specified at 700 mV @ 15 A. The isolated tab variant provides additional thermal and electrical isolation benefits. REACH affected status differs from the original part but remains acceptable for substitution. Average rectified current is not specified in available documentation. Operating temperature range is -55°C to 150°C. This substitute is suitable for applications where isolated tab configuration provides design advantages.

Alternative Substitute: MBRF30L45CTG

The MBRF30L45CTG from onsemi (SWITCHMODE™ series) provides 45 V reverse voltage and 15 A average rectified current in TO-220-3 Full Pack through-hole configuration. Forward voltage is 500 mV @ 15 A, the lowest among all substitutes. The part is classified as obsolete product status, limiting long-term procurement viability. Reverse leakage current is elevated at 650 µA @ 45 V. This substitute is suitable only for applications where existing inventory is available and long-term supply is not a requirement.

Not Recommended: MBRF3045CT

The MBRF3045CT from Taiwan Semiconductor Corporation provides 30 A average rectified current, exceeding the 15 A specification of the original part. While this represents electrical over-specification, the forward voltage is significantly higher at 820 mV @ 30 A, indicating different thermal and electrical characteristics. Product status is discontinued at DiGi Electronics, limiting procurement options. This part is not recommended as a direct substitute due to electrical characteristic mismatch and supply discontinuation.

Frequently Asked Questions (FAQ)

Q: Can the STPS30L45CFP directly replace the STPS3045CFP without circuit modification?

A: Yes. The STPS30L45CFP is electrically and mechanically compatible with the STPS3045CFP. Both parts share identical voltage ratings (45 V), current ratings (15 A per diode), diode configuration (1 pair common cathode), and package type (TO-220-3 Full Pack through-hole). Forward voltage and reverse leakage current variations are within acceptable engineering tolerances for Schottky diode applications.

Q: What is the difference between TO-220FP and ITO-220AB packages?

A: TO-220FP is a standard through-hole TO-220-3 Full Pack package with standard thermal characteristics. ITO-220AB is an isolated tab variant of the TO-220-3 Full Pack, providing electrical isolation between the tab and the mounting surface. The isolated tab configuration is beneficial in applications requiring galvanic isolation or where multiple devices are mounted on a common heat sink. Pin-to-pin compatibility is maintained between these variants.

Q: Why is the STPS3045CFP classified as obsolete?

A: The STPS3045CFP is classified as obsolete by STMicroelectronics, indicating the manufacturer has discontinued active production and support. However, the part remains in stock with 7629 units available as new original inventory. The active equivalent STPS30L45CFP is the recommended replacement for new designs and ongoing procurement.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant. The MBRF3045CTP carries REACH affected status, while all other substitutes maintain REACH unaffected status. Both compliance statuses are acceptable for substitution purposes.

Q: What is the significance of reverse leakage current variation among substitutes?

A: Reverse leakage current varies from 100 µA to 1 mA across the substitute parts, compared to 200 µA for the original STPS3045CFP. Higher reverse leakage current increases power dissipation in reverse bias conditions and may affect circuit performance in applications with stringent leakage requirements. For most standard rectifier applications, these variations are acceptable. Applications with critical leakage specifications should select substitutes with lower reverse leakage values (MBR3045CTF-E1 at 100 µA or MBRF3045CT at 200 µA).

Q: Can the MBRF3045CT (30 A rated) be used in place of the STPS3045CFP (15 A rated)?

A: While the MBRF3045CT provides higher current capacity, it is not recommended as a direct substitute. The 30 A rating indicates different internal construction and thermal characteristics. Forward voltage at 30 A operation (820 mV) differs significantly from the 15 A specification of the original part (570 mV). Circuit behavior, thermal management, and efficiency characteristics will differ. Use the MBRF3045CT only if the application specifically requires 30 A capability.

Q: What is the operating temperature range consideration for substitution?

A: The STPS3045CFP specifies maximum junction temperature of 200°C. Substitute parts specify operating temperature ranges (e.g., -55°C to 150°C or -65°C to 150°C) rather than maximum junction temperature. These ranges define safe operating conditions for the device. For applications operating near thermal limits, verify that the selected substitute's maximum junction temperature specification is adequate for the intended thermal environment.

Q: Is packaging (Tube vs. standard) a consideration for substitution?

A: Packaging format (Tube vs. standard) affects procurement and handling but does not impact electrical or mechanical compatibility. The STPS30L45CFP is supplied in Tube packaging, while the original STPS3045CFP packaging is not specified. Both formats contain identical components and are suitable for substitution in circuit applications.

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