Equivalent & Substitute Parts for B150B-13 Schottky Diode

Part Overview

The B150B-13 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 50 V DC reverse voltage and 1 A average rectified current in a surface mount SMB (DO-214AA) package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production needs. The part exhibits fast recovery characteristics with a maximum forward voltage of 700 mV at 1 A and operates across a junction temperature range of -65°C to 150°C.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	700 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500 µA @ 50 V	µA
Capacitance @ Vr, F	110 pF @ 4V, 1MHz	pF
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
Technology	Schottky	—

Substitute Part Grouping Explanation

Substitution of the B150B-13 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Direct Substitution:

Voltage - DC Reverse (Vr) (Max): 50 V minimum
Current - Average Rectified (Io): 1 A minimum
Package / Case: DO-214AA, SMB (surface mount)
Mounting Type: Surface Mount
Technology: Schottky

Secondary Parameters Affecting Compatibility:

Voltage - Forward (Vf) (Max) @ If: 700 mV @ 1 A or lower
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: 500 µA @ rated voltage or lower
Operating Temperature - Junction: -65°C ~ 150°C or equivalent range

Substitute parts are grouped into three categories:

Category 1 - Parametric Equivalents (Identical Electrical Specifications): Parts with matching voltage, current, and thermal ratings from the same manufacturer.

Category 2 - Manufacturer Recommended Equivalents (Higher Voltage or Current Rating): Parts with equal or superior electrical performance that maintain compatibility within the same package family.

Category 3 - Cross-Manufacturer Alternatives (Different Manufacturers): Parts meeting or exceeding the electrical specifications with active product status and compliance certifications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package	Product Status	RoHS Status
B150B-13	Diodes Incorporated	50 V	1 A	700 mV @ 1 A	DO-214AA, SMB	Discontinued	Non-compliant
B150B-13-F	Diodes Incorporated	50 V	1 A	700 mV @ 1 A	DO-214AA, SMB	Active	ROHS3 Compliant
B150BQ-13-F	Diodes Incorporated	50 V	1 A	700 mV @ 1 A	DO-214AA, SMB	Active	ROHS3 Compliant
CMSH1-60 TR13 PBFREE	Central Semiconductor Corp	60 V	1 A	700 mV @ 1 A	DO-214AA, SMB	Active	ROHS3 Compliant
SK35B-LTP	Micro Commercial Co	50 V	3 A	750 mV @ 3 A	DO-214AA, HSMB	Not For New Designs	ROHS3 Compliant
STPS140U	STMicroelectronics	40 V	1 A	550 mV @ 1 A	DO-214AA, SMB	Active	ROHS3 Compliant
STPS1L40U	STMicroelectronics	40 V	1 A	500 mV @ 1 A	DO-214AA, SMB	Active	ROHS3 Compliant
STPS1L40UY	STMicroelectronics	40 V	1 A	500 mV @ 1 A	DO-214AA, SMB	Active	ROHS3 Compliant
STPS2L40U	STMicroelectronics	40 V	2 A	430 mV @ 2 A	DO-214AA, SMB	Active	ROHS3 Compliant
STPS340U	STMicroelectronics	40 V	3 A	630 mV @ 3 A	DO-214AA, SMB	Active	ROHS3 Compliant
STPS340UY	STMicroelectronics	40 V	3 A	630 mV @ 3 A	DO-214AA, SMB	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation - Direct Parametric Equivalent:

The B150B-13-F is the preferred substitute for the discontinued B150B-13. This part maintains identical electrical specifications (50 V, 1 A, 700 mV forward voltage) and package configuration while offering active product status and ROHS3 compliance. The part is available in Tape & Reel packaging with 3135 units in stock.

Secondary Recommendation - Automotive Grade Equivalent:

The B150BQ-13-F provides identical electrical performance to the B150B-13 with the addition of automotive-grade qualification (AEC-Q101) and ROHS3 compliance. This part is suitable for applications requiring automotive-level reliability and traceability. Product status is active with 1053 units in stock.

Alternative for Voltage Margin Applications:

The CMSH1-60 TR13 PBFREE from Central Semiconductor Corp offers a 60 V reverse voltage rating while maintaining 1 A current capacity and 700 mV forward voltage specification. This part provides additional voltage margin for circuits operating near the 50 V limit. Product status is active with 7419 units in stock.

Alternatives for Current Derating Scenarios:

When circuit design permits operation at reduced current levels, the STMicroelectronics STPS1L40U and STPS1L40UY provide 40 V reverse voltage with 1 A current rating. The STPS1L40UY includes automotive-grade qualification (AEC-Q101). Both parts feature lower forward voltage (500 mV @ 1 A) compared to the B150B-13, reducing power dissipation. These parts are active with 7900 and 11660 units in stock respectively.

Higher Current Alternatives:

For applications requiring increased current capacity, the STPS2L40U (2 A) and STPS340U/STPS340UY (3 A) provide higher current ratings in the same SMB package. The STPS340UY includes automotive-grade qualification. These parts operate at 40 V reverse voltage and are suitable for designs with voltage margin. All parts are active with substantial inventory availability.

Not Recommended for New Designs:

The SK35B-LTP from Micro Commercial Co carries a "Not For New Designs" status despite meeting electrical specifications. This part should not be selected for new circuit development.

Frequently Asked Questions (FAQ)

Q: Can the B150B-13-F directly replace the B150B-13 in existing designs?

A: Yes. The B150B-13-F is a parametric equivalent with identical voltage (50 V), current (1 A), forward voltage (700 mV @ 1 A), and package specifications (DO-214AA, SMB). The primary difference is product status (active versus discontinued) and RoHS compliance (ROHS3 compliant versus non-compliant). No circuit modifications are required.

Q: What is the difference between B150B-13-F and B150BQ-13-F?

A: Both parts are parametric equivalents with identical electrical specifications. The B150BQ-13-F includes automotive-grade qualification (AEC-Q101) and is designated for automotive applications. Selection between these parts depends on application requirements and qualification documentation needs.

Q: Can I use STPS1L40U or STPS1L40UY as substitutes for the B150B-13?

A: These parts are not direct equivalents. The STPS series operates at 40 V maximum reverse voltage, which is 10 V lower than the B150B-13 specification. Use of these parts is limited to circuits where the 40 V rating provides sufficient margin above the maximum operating voltage. The forward voltage is lower (500 mV @ 1 A), which reduces power dissipation but does not compensate for the voltage rating reduction.

Q: Why would I select CMSH1-60 TR13 PBFREE over B150B-13-F?

A: The CMSH1-60 provides 60 V reverse voltage rating compared to 50 V for the B150B-13-F. Selection of the higher voltage part is appropriate for circuits operating near the 50 V limit or where additional voltage margin is required for reliability. Both parts maintain 1 A current capacity and 700 mV forward voltage specification.

Q: Are the higher current alternatives (STPS2L40U, STPS340U, STPS340UY) suitable for 1 A applications?

A: Yes. These parts are rated for 2 A and 3 A respectively and operate safely at 1 A. However, the 40 V reverse voltage rating is 10 V lower than the B150B-13 specification. Selection of these parts is appropriate only when circuit design provides sufficient voltage margin below 40 V.

Q: What does "Not For New Designs" mean for the SK35B-LTP?

A: This designation indicates the manufacturer has discontinued active development and support for this part. While the part may be available in inventory, it should not be selected for new circuit development. Established designs currently using this part may continue operation, but new designs should select from parts with "Active" product status.

Q: Does packaging differ between substitute parts?

A: Most substitute parts use the standard DO-214AA, SMB package. The SK35B-LTP is designated as DO-214AA, HSMB (High-power SMB), which is a variant of the SMB package. All parts are surface mount components suitable for automated assembly on standard PCB equipment.

Q: What is the significance of RoHS compliance for substitute selection?

A: The B150B-13 is RoHS non-compliant, while all substitute parts listed are ROHS3 compliant. For new designs and production, ROHS3 compliance is required in most markets. The B150B-13-F and B150BQ-13-F provide direct electrical equivalents with ROHS3 compliance, eliminating compliance concerns for new production.

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

A: Yes, provided each part location meets the electrical requirements of that specific circuit node. Different parts may be used in different locations based on local voltage and current requirements. However, for manufacturing consistency and supply chain management, using a single part number across identical circuit functions is recommended.

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