STPS3150 Equivalent & Substitute Parts

Part Overview

The STPS3150 is a Schottky rectifier diode rated for 150 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical performance within the specified parameters while offering active product status and current manufacturing availability.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	150	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	820	mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	2	µA @ 150 V
Mounting Type	Through Hole	—
Package / Case	DO-201AD, Axial	—
Operating Temperature - Junction (Max)	175	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the STPS3150 are classified based on strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 150 V
Current - Average Rectified (Io): 3 A
Technology: Schottky
Mounting Type: Through Hole
Package / Case: DO-201AD, Axial
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Direct Equivalent Classification: Parts meeting all primary criteria with forward voltage (Vf) within ±100 mV of the main part specification (820 mV @ 3 A) are classified as direct equivalents. These parts are electrically interchangeable without circuit modification.

Similar Classification: Parts meeting all primary criteria but with forward voltage (Vf) or reverse leakage characteristics outside the direct equivalent range are classified as similar. These parts maintain functional compatibility within the specified electrical envelope but exhibit measurable parameter variations.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max) [V]	Io [A]	Vf (Max) @ 3A [mV]	Ir @ 150V [µA]	Operating Temp (Max) [°C]	RoHS Status
STPS3150	STMicroelectronics	Obsolete	150	3	820	2	175	ROHS3 Compliant
STPS3150RL	STMicroelectronics	Active	150	3	820	2	175	ROHS3 Compliant
SB3150	SMC Diode Solutions	Active	150	—	890	1000	150	ROHS3 Compliant
MBR3H150SS_AY_00001	Panjit International Inc.	Active	150	3	850	0.5	175	ROHS3 Compliant
SR3150-TP	Micro Commercial Co	Active	150	3	920	500	150	—
SR3150-AP	Micro Commercial Co	Active	150	3	920	500	150	—
SR3150-BP	Micro Commercial Co	Active	150	3	920	500	150	—

Engineering Selection Recommendations

Direct Equivalent - Recommended Primary Substitute:

STPS3150RL (STMicroelectronics) is the direct equivalent replacement for the obsolete STPS3150. This part maintains identical electrical specifications including forward voltage (820 mV @ 3 A), reverse leakage (2 µA @ 150 V), and maximum junction temperature (175°C). The part is manufactured by the same supplier, carries active product status, and is ROHS3 compliant. Inventory availability is 25,400 units. This part is supplied in Cut Tape (CT) packaging, suitable for automated assembly processes.

Alternative Direct Equivalent:

MBR3H150SS_AY_00001 (Panjit International Inc.) meets all primary electrical criteria with forward voltage of 850 mV @ 3 A, representing a 30 mV increase from the main part specification. Reverse leakage is 0.5 µA @ 150 V, lower than the main part. Maximum junction temperature is 175°C, matching the main part. This part is ROHS3 compliant and REACH unaffected. Inventory availability is 2,045 units.

Similar Alternatives:

SB3150 (SMC Diode Solutions) maintains the 150 V reverse voltage rating and DO-201AD package but exhibits higher forward voltage (890 mV @ 3 A) and significantly higher reverse leakage (1 mA @ 150 V). Maximum junction temperature is 150°C, 25°C lower than the main part. This part is ROHS3 compliant but REACH affected. Inventory availability is 9,700 units.

SR3150-TP, SR3150-AP, and SR3150-BP (Micro Commercial Co) are identical variants differing only in packaging configuration (Bulk). These parts exhibit forward voltage of 920 mV @ 3 A and reverse leakage of 500 µA @ 150 V. Maximum junction temperature is 150°C. Inventory availability ranges from 742 to 858 units per variant.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance. STPS3150RL and MBR3H150SS_AY_00001 are REACH unaffected. SB3150 is REACH affected. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Frequently Asked Questions (FAQ)

Q: Can STPS3150RL be used as a direct replacement for STPS3150 in existing designs?

A: Yes. STPS3150RL is electrically identical to STPS3150, with matching forward voltage (820 mV @ 3 A), reverse leakage (2 µA @ 150 V), and maximum junction temperature (175°C). Both parts use the DO-201AD axial through-hole package. The primary difference is product status: STPS3150RL is active while STPS3150 is obsolete.

Q: What is the significance of the forward voltage difference between STPS3150 and MBR3H150SS_AY_00001?

A: MBR3H150SS_AY_00001 exhibits a forward voltage of 850 mV @ 3 A compared to 820 mV @ 3 A for STPS3150, representing a 30 mV increase. This difference affects power dissipation in the diode. In a 3 A circuit, the additional voltage drop results in approximately 90 mW additional power dissipation. Circuit thermal design must account for this increase.

Q: Are the SR3150 variants (SR3150-TP, SR3150-AP, SR3150-BP) electrically identical?

A: Yes. SR3150-TP, SR3150-AP, and SR3150-BP are electrically identical parts differing only in packaging configuration (Bulk). All three variants exhibit identical electrical specifications: 150 V reverse voltage, 3 A average rectified current, 920 mV forward voltage @ 3 A, and 500 µA reverse leakage @ 150 V.

Q: What are the implications of the higher reverse leakage in SB3150 and SR3150 variants?

A: SB3150 exhibits reverse leakage of 1 mA @ 150 V, and SR3150 variants exhibit 500 µA @ 150 V, compared to 2 µA @ 150 V for STPS3150. Higher reverse leakage increases standby current consumption and heat generation when the diode is reverse biased. Applications with stringent leakage requirements should prioritize STPS3150RL or MBR3H150SS_AY_00001.

Q: Does the DO-201AD package ensure mechanical compatibility across all substitute parts?

A: Yes. All substitute parts use the DO-201AD axial through-hole package, ensuring mechanical compatibility with existing PCB layouts and assembly processes. Packaging configuration (Cut Tape, Bulk) affects supply and handling but does not alter the physical component dimensions or pin spacing.

Q: What is the impact of the 25°C lower maximum junction temperature in SB3150 and SR3150 variants?

A: SB3150 and SR3150 variants are rated to 150°C maximum junction temperature, compared to 175°C for STPS3150 and STPS3150RL. This 25°C reduction constrains thermal headroom in high-temperature applications. Circuits operating near maximum ambient temperature should prioritize parts with 175°C ratings.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. However, SB3150 is REACH affected, while STPS3150RL and MBR3H150SS_AY_00001 are REACH unaffected. Applications subject to REACH regulations should verify compliance requirements with the specific substitute part selected.

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