Equivalent & Substitute Parts for 30CPQ045

Part Overview

The 30CPQ045 is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as a 1 Pair Common Cathode device rated for 45 V DC reverse voltage and 15 A average rectified current per diode. The component is housed in a TO-247-3 through-hole package and features fast recovery characteristics suitable for high-frequency rectification applications.

The 30CPQ045 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades. Active alternatives with identical or enhanced electrical specifications are available from multiple manufacturers.

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)	15	A
Voltage - Forward (Vf) (Max) @ If	540 mV @ 15 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	1.75	mA @ 45 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-247-3	—

Substitute Part Grouping Explanation

Substitution of the 30CPQ045 is determined by the following critical parameters:

Primary Substitution Criteria:

Diode Configuration: 1 Pair Common Cathode (mandatory match)
Technology: Schottky (mandatory match)
Voltage - DC Reverse (Vr) (Max): 45 V (mandatory match)
Mounting Type: Through Hole (mandatory match)
Package / Case: TO-247-3 (mandatory match)

Secondary Substitution Criteria:

Current - Average Rectified (Io) (per Diode): Equal to or greater than 15 A
Voltage - Forward (Vf) (Max) @ If: Equal to or lower than 540 mV @ 15 A (or equivalent at rated current)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (mandatory match)
Operating Temperature - Junction: Equal to or greater than -55°C to 150°C range

Substitute parts meeting all primary criteria and maintaining or improving secondary electrical characteristics are classified as direct equivalents. Parts with enhanced current ratings (30 A) or improved thermal performance are classified as upgrades suitable for higher-stress applications.

Parameter Comparison

Parameter	30CPQ045	VS-30CPQ045-N3	STPS3045CW	STPS30L45CW	STPS4045CWY	STPS60L45CW	DSSK60-0045A
Manufacturer	Vishay	Vishay	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	IXYS
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	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	45 V	45 V	45 V	45 V	45 V
Current - Average Rectified (Io) (per Diode)	15 A	15 A	15 A	15 A	20 A	30 A	30 A
Voltage - Forward (Vf) (Max) @ If	540 mV @ 15 A	540 mV @ 15 A	570 mV @ 15 A	550 mV @ 15 A	760 mV @ 20 A	550 mV @ 30 A	690 mV @ 30 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)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1.75 mA @ 45 V	1.75 mA @ 45 V	200 µA @ 45 V	400 µA @ 45 V	200 µA @ 45 V	1.5 mA @ 45 V	1 mA @ 45 V
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	Max 200°C	Max 150°C	-40 to 175°C	Max 150°C	-55 to 175°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-247-3	TO-247-3	TO-247-3	TO-247-3	TO-247-3	TO-247-3	TO-247-3
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Pin-Compatible, Electrical Match):

VS-30CPQ045-N3 is the direct parametric equivalent to the 30CPQ045. Both devices share identical electrical specifications, diode configuration, and thermal operating range. VS-30CPQ045-N3 is manufactured by the same supplier (Vishay General Semiconductor - Diodes Division) and maintains active product status with ROHS3 compliance. This part is the primary choice for direct replacement in existing designs.

Equivalent Alternatives (Identical Electrical Performance, Different Manufacturer):

STPS3045CW and STPS30L45CW are functionally equivalent alternatives manufactured by STMicroelectronics. Both maintain the 45 V / 15 A electrical specification and TO-247-3 package. STPS3045CW offers extended maximum junction temperature (200°C) compared to the original specification. STPS30L45CW provides improved forward voltage characteristics (550 mV @ 15 A) and lower reverse leakage (400 µA @ 45 V). Both are ROHS3 compliant and actively produced.

Upgraded Alternatives (Enhanced Current Rating):

STPS4045CWY provides 20 A current rating with 45 V reverse voltage in the same TO-247-3 package. This part is suitable for applications requiring higher current capacity while maintaining the same voltage specification. STPS4045CWY includes automotive qualification (AEC-Q101) and extended operating temperature range (-40°C to 175°C).

STPS60L45CW and DSSK60-0045A both provide 30 A current rating at 45 V reverse voltage. STPS60L45CW is manufactured by STMicroelectronics with ROHS3 compliance. DSSK60-0045A is manufactured by IXYS and offers extended maximum junction temperature (175°C). Both are suitable for high-current applications where the original 15 A specification is insufficient.

Compliance Considerations:

The original 30CPQ045 is RoHS non-compliant. All substitute parts listed are ROHS3 compliant, meeting current environmental and regulatory requirements for new production and procurement.

Frequently Asked Questions (FAQ)

Q: Can VS-30CPQ045-N3 be used as a direct replacement for 30CPQ045?

A: Yes. VS-30CPQ045-N3 is a parametric equivalent with identical electrical specifications, diode configuration, thermal range, and package. The part is manufactured by the same supplier and is actively produced. It is the recommended direct replacement.

Q: What is the difference between the 15 A and 30 A rated alternatives?

A: Current rating indicates the maximum average rectified current per diode. The 30CPQ045 is rated for 15 A per diode. STPS60L45CW and DSSK60-0045A are rated for 30 A per diode. Selection depends on application current requirements. Higher-rated parts can be used in lower-current applications without performance degradation, but lower-rated parts cannot be used in higher-current applications.

Q: Are all substitute parts available in the same TO-247-3 package?

A: Yes. All substitute parts listed are housed in TO-247-3 through-hole packages with identical pin configurations and mechanical dimensions. Direct board-level substitution is possible without layout modifications.

Q: What is the significance of forward voltage (Vf) differences among the alternatives?

A: Forward voltage determines power dissipation in the diode during conduction. Lower forward voltage results in reduced heat generation. STPS30L45CW and STPS60L45CW offer lower forward voltage (550 mV) compared to the original 30CPQ045 (540 mV @ 15 A), improving efficiency. STPS4045CWY exhibits higher forward voltage (760 mV @ 20 A) due to its higher current rating.

Q: Why do some alternatives have different reverse leakage current specifications?

A: Reverse leakage current is a temperature and voltage-dependent parameter that varies among manufacturers and device generations. Lower reverse leakage (200 µA in STPS3045CW and STPS4045CWY) indicates improved device quality and reduced standby power consumption. All listed values remain within acceptable ranges for Schottky diode applications.

Q: Is STPS4045CWY suitable for applications originally designed for 15 A operation?

A: Yes. STPS4045CWY is rated for 20 A and can operate at 15 A without exceeding its specifications. The higher current rating provides design margin and improved thermal performance at the original operating current. The part is automotive-qualified (AEC-Q101) and suitable for demanding applications.

Q: What is the advantage of DSSK60-0045A over STPS60L45CW?

A: Both parts provide 30 A current rating at 45 V. DSSK60-0045A is manufactured by IXYS and offers extended maximum junction temperature (175°C) compared to STPS60L45CW (150°C). DSSK60-0045A also exhibits lower reverse leakage (1 mA @ 45 V). Selection depends on thermal environment and application requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. The original 30CPQ045 is RoHS non-compliant. Substitution with any listed alternative ensures compliance with current environmental regulations and procurement requirements.

Q: Can substitute parts be mixed in the same circuit or assembly?

A: All substitute parts share identical diode configuration (1 Pair Common Cathode), voltage rating (45 V), and package (TO-247-3). Mixing different manufacturers or current ratings in the same circuit is permissible from an electrical standpoint, provided the application current does not exceed the lowest-rated part in the circuit. Design consistency and supply chain management typically favor single-part selection per application.

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