STPS30L120CFP Equivalent & Substitute Parts

Part Overview

The STPS30L120CFP is a Schottky diode array manufactured by STMicroelectronics, configured as 1 pair common cathode with 120 V reverse voltage rating and 15 A average rectified current per diode. This component is packaged in TO-220-3 Full Pack through-hole configuration. The product status is obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	120 V
Current - Average Rectified (Io) (per Diode)	15 A
Voltage - Forward (Vf) (Max) @ If	880 mV @ 15 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type	Through Hole
Package / Case	TO-220-3 Full Pack
Operating Temperature - Junction (Max)	150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the STPS30L120CFP is determined by the following critical parameters: diode configuration (common cathode vs. common anode), reverse voltage rating, average rectified current per diode, package type (TO-220-3 Full Pack), and mounting method (through-hole).

The substitute parts are grouped into three categories based on their relationship to the main part:

MFR Recommended Substitute: Parts with identical or superior electrical specifications and active product status from the original manufacturer.

Direct Manufacturer Substitute: Parts from alternative manufacturers with equivalent electrical specifications and compatible package configurations.

Similar Manufacturer Substitute: Parts with comparable voltage and current ratings but differing diode configuration or other secondary parameters.

Substitution is valid when the following conditions are met: reverse voltage rating is equal to or greater than the original specification, average rectified current per diode is equal to or greater than the original specification, package type is compatible with the PCB layout, and diode configuration matches the circuit topology requirements.

Parameter Comparison

Parameter	STPS30L120CFP	STPS30150CFP	DSTF30120C	STF20120CR
Manufacturer	STMicroelectronics	STMicroelectronics	Littelfuse Inc.	SMC Diode Solutions
Product Status	Obsolete	Active	Active	Active
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Anode
Technology	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	120 V	150 V	120 V	120 V
Current - Average Rectified (Io) (per Diode)	15 A	15 A	15 A	Not Specified
Voltage - Forward (Vf) (Max) @ If	880 mV @ 15 A	920 mV @ 15 A	970 mV @ 15 A	900 mV @ 10 A
Speed	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 @ 120 V	6.5 µA @ 150 V	800 µA @ 120 V	700 µA @ 120 V
Operating Temperature - Junction (Max)	150°C	175°C	150°C	150°C
Mounting Type	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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Affected

Engineering Selection Recommendations

STPS30150CFP (MFR Recommended Substitute): This STMicroelectronics part is the primary substitute for the obsolete STPS30L120CFP. It maintains identical diode configuration (1 pair common cathode), identical current rating (15 A per diode), and identical package type (TO-220-3 Full Pack). The reverse voltage rating is increased to 150 V, providing superior voltage margin. The product status is active with 2334 units in stock. This part is ROHS3 compliant and REACH unaffected, meeting regulatory requirements. The maximum junction temperature is increased to 175°C, providing enhanced thermal performance.

DSTF30120C (Direct Manufacturer Substitute): This Littelfuse Inc. part provides direct electrical equivalence with 120 V reverse voltage and 15 A current rating. The diode configuration is identical (1 pair common cathode). The package includes an isolated tab variant (ITO-220AB) of the TO-220-3 Full Pack, which may provide thermal or isolation advantages in specific applications. The product status is active with 730 units in stock. This part is ROHS3 compliant and REACH unaffected. The operating temperature range is specified as -55°C to 150°C.

STF20120CR (Similar Manufacturer Substitute): This SMC Diode Solutions part shares the 120 V reverse voltage rating and through-hole TO-220-3 Full Pack configuration. However, the diode configuration differs: this part is configured as 1 pair common anode, whereas the original part is common cathode. This configuration difference requires circuit topology verification before substitution. The average rectified current per diode is not specified in the provided data. The product status is active with 1486 units in stock. This part is ROHS3 compliant but REACH affected, which may impose additional regulatory constraints. The operating temperature range is -55°C to 150°C.

Frequently Asked Questions (FAQ)

Q: Can STPS30150CFP be used as a direct replacement for STPS30L120CFP?

A: Yes. The STPS30150CFP maintains identical diode configuration (1 pair common cathode), identical current rating (15 A per diode), and identical package type (TO-220-3 Full Pack). The increased reverse voltage rating (150 V vs. 120 V) provides additional voltage margin and is compatible with circuits designed for 120 V operation. The part is active and in stock.

Q: What is the key difference between DSTF30120C and STPS30L120CFP?

A: Both parts share identical reverse voltage (120 V) and current (15 A) ratings with common cathode configuration. The primary difference is the package variant: DSTF30120C uses an isolated tab version (ITO-220AB) of the TO-220-3 Full Pack, which may provide thermal or electrical isolation benefits. The manufacturer differs (Littelfuse Inc. vs. STMicroelectronics).

Q: Why is STF20120CR listed as a similar substitute rather than a direct substitute?

A: The STF20120CR has a different diode configuration: 1 pair common anode instead of common cathode. This configuration difference affects circuit topology and pin functionality. Substitution requires verification that the circuit design accommodates common anode configuration. Additionally, the average rectified current per diode is not specified for this part.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all substitute parts listed are ROHS3 compliant. However, STF20120CR is REACH affected, whereas STPS30150CFP and DSTF30120C are REACH unaffected. This distinction may impact procurement and regulatory compliance depending on application requirements.

Q: Can I use STPS30150CFP in a circuit designed for 120 V operation?

A: Yes. The STPS30150CFP is rated for 150 V reverse voltage, which exceeds the 120 V requirement of the original circuit. The part operates safely at lower voltage ratings. All other electrical parameters are compatible with the original specification.

Q: What is the significance of the isolated tab in DSTF30120C?

A: The isolated tab variant (ITO-220AB) provides electrical isolation between the mounting tab and the diode cathode, unlike the standard TO-220-3 Full Pack where the tab is connected to the cathode. This isolation may be required for specific thermal management or electrical isolation requirements in the application circuit.

Q: How do forward voltage characteristics compare across the substitute parts?

A: Forward voltage varies across the substitutes: STPS30L120CFP is 880 mV @ 15 A, STPS30150CFP is 920 mV @ 15 A, DSTF30120C is 970 mV @ 15 A, and STF20120CR is 900 mV @ 10 A. These differences affect power dissipation and thermal performance. Selection depends on circuit requirements for forward voltage drop and thermal budget.

Q: What is the reverse leakage current difference between STPS30150CFP and the original part?

A: The STPS30150CFP has significantly lower reverse leakage current (6.5 µA @ 150 V) compared to STPS30L120CFP (200 µA @ 120 V). This improvement reduces standby power consumption and heat generation in applications with sustained reverse bias conditions.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message