B330B-13 Schottky Diode 30V 3A SMB Equivalent & Substitute Parts

Part Overview

The B330B-13 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 30V DC reverse voltage and 3A average rectified current in a Surface Mount SMB (DO-214AA) package. This component is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design support and procurement.

The B330B-13 operates across a junction temperature range of -55°C to 150°C and exhibits fast recovery characteristics suitable for high-frequency switching applications. RoHS non-compliance and discontinued status require evaluation of active alternatives that meet current regulatory requirements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500 µA @ 30 V	µA
Capacitance @ Vr, F	200pF @ 4V, 1MHz	pF
Package / Case	DO-214AA, SMB	—
Operating Temperature - Junction	-55°C ~ 150°C	°C
Technology	Schottky	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the B330B-13 is determined by the following critical parameters:

Voltage Rating (Vr): The reverse voltage must equal or exceed 30V. Parts rated at higher voltages (40V) are acceptable as they provide additional margin.

Current Rating (Io): The average rectified current must equal or exceed 3A. Parts rated at higher currents (4A) are acceptable as they provide additional capacity.

Package Type: All substitutes must use the DO-214AA (SMB) surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.

Technology: All substitutes must employ Schottky diode technology to maintain fast recovery characteristics and forward voltage performance.

Speed Characteristic: Fast recovery performance (≤ 500ns, > 200mA) must be maintained across all substitutes.

Substitutes are grouped into three categories:

Category 1 - Parametric Equivalents: Parts with identical or superior electrical specifications and active product status. These provide direct replacement capability with regulatory compliance improvements.

Category 2 - Functional Equivalents: Parts with equivalent or superior voltage and current ratings but different product status or minor specification variations. These maintain electrical compatibility with design considerations.

Category 3 - Limited Substitutes: Parts with reduced current ratings or obsolete status. These are suitable only for applications with reduced current requirements or legacy system support.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Package	Product Status	RoHS Status
B330B-13	Diodes Incorporated	30	3	500 @ 3A	DO-214AA, SMB	Discontinued	Non-compliant
B330B-13-F	Diodes Incorporated	30	3	500 @ 3A	DO-214AA, SMB	Active	ROHS3 Compliant
SK33B-LTP	Micro Commercial Co	30	3	500 @ 3A	DO-214AA, SMB	Not For New Designs	ROHS3 Compliant
SK43BL-TP	Micro Commercial Co	30	4	450 @ 4A	DO-214AA, SMB	Not For New Designs	ROHS3 Compliant
CMSH3-40M TR13 PBFREE	Central Semiconductor Corp	40	3	550 @ 3A	DO-214AA, SMB	Active	ROHS3 Compliant
STPS130U	STMicroelectronics	30	1	550 @ 1A	DO-214AA, SMB	Active	ROHS3 Compliant
STPS1L30U	Vishay General Semiconductor - Diodes Division	30	1	420 @ 1A	DO-214AA, SMB	Obsolete	Non-compliant

Engineering Selection Recommendations

Primary Substitute - B330B-13-F (Diodes Incorporated):

The B330B-13-F is the recommended direct replacement for the B330B-13. This part maintains identical electrical specifications (30V, 3A, 500mV forward voltage) while offering active product status and ROHS3 compliance. The part is available in high volume (188,300 pcs) with Cut Tape and Digi-Reel packaging options. Selection of this part eliminates regulatory compliance concerns and ensures long-term supply availability.

Secondary Substitute - SK33B-LTP (Micro Commercial Co):

The SK33B-LTP provides parametric equivalence with identical voltage, current, and forward voltage specifications. ROHS3 compliance is achieved. However, the part carries "Not For New Designs" status, limiting its suitability to legacy system support or applications where existing inventory must be maintained. Limited inventory (3,300 pcs) restricts procurement options.

Functional Substitute - SK43BL-TP (Micro Commercial Co):

The SK43BL-TP offers superior current rating (4A versus 3A) and improved forward voltage performance (450mV @ 4A versus 500mV @ 3A) while maintaining 30V voltage rating and DO-214AA packaging. "Not For New Designs" status and reduced forward voltage at rated current make this suitable for applications requiring enhanced current capacity. Inventory availability is adequate (62,400 pcs).

Voltage-Enhanced Substitute - CMSH3-40M TR13 PBFREE (Central Semiconductor Corp):

The CMSH3-40M TR13 PBFREE provides elevated voltage rating (40V versus 30V) with maintained 3A current capacity. Active product status and ROHS3 compliance support new design implementation. Forward voltage is slightly elevated (550mV @ 3A versus 500mV @ 3A). This part is suitable for applications requiring additional voltage margin or where 40V rated components are specified. Inventory is available (14,665 pcs).

Not Recommended - STPS130U and STPS1L30U:

The STPS130U and STPS1L30U are rated for 1A current, which is insufficient for the 3A requirement of the B330B-13. These parts are suitable only for applications with reduced current demands and are not appropriate for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can the B330B-13-F be used as a direct replacement for the B330B-13?

A: Yes. The B330B-13-F maintains identical electrical specifications (30V, 3A, 500mV forward voltage) and DO-214AA package configuration. The primary differences are active product status and ROHS3 compliance, both of which represent improvements over the original part.

Q: What is the difference between the B330B-13 and B330B-13-F?

A: The B330B-13-F is the active production variant of the B330B-13. Both parts share identical electrical specifications and packaging. The B330B-13-F incorporates ROHS3 compliance and maintains active product status, whereas the B330B-13 is discontinued and RoHS non-compliant.

Q: Can the SK43BL-TP be used in place of the B330B-13?

A: The SK43BL-TP is electrically compatible with the B330B-13 for applications operating at or below 3A. The part provides superior current capacity (4A) and improved forward voltage performance (450mV @ 4A). However, "Not For New Designs" status limits its use to legacy system support. Mechanical compatibility is maintained through identical DO-214AA packaging.

Q: Why is the CMSH3-40M TR13 PBFREE listed as a substitute if it has a higher voltage rating?

A: The CMSH3-40M TR13 PBFREE is listed as a functional substitute because higher voltage ratings are acceptable in applications designed for 30V operation. The 40V rating provides additional safety margin and is compatible with 30V circuit designs. This part is suitable when voltage-enhanced components are preferred or specified.

Q: Are STPS130U and STPS1L30U suitable replacements for the B330B-13?

A: No. Both STPS130U and STPS1L30U are rated for 1A average rectified current, which is insufficient for the 3A requirement of the B330B-13. These parts are suitable only for applications with reduced current demands and cannot serve as direct substitutes.

Q: What packaging options are available for substitute parts?

A: All substitute parts listed maintain the DO-214AA (SMB) surface mount package configuration, ensuring mechanical compatibility with existing PCB layouts. Packaging variants include Cut Tape (CT), Digi-Reel, and Tape & Reel (TR) options depending on the specific manufacturer part number and supplier.

Q: Does the B330B-13-F require any design modifications for implementation?

A: No design modifications are required. The B330B-13-F is a direct replacement with identical electrical specifications and package configuration. PCB layout, thermal management, and circuit design remain unchanged.

Q: What is the significance of "Not For New Designs" status?

A: "Not For New Designs" indicates that the manufacturer is not actively promoting the part for new applications and may discontinue production. These parts are suitable for legacy system support or maintenance of existing designs but should not be selected for new product development. Active product status parts are preferred for new designs.

Q: How do forward voltage specifications affect part selection?

A: Forward voltage (Vf) determines the voltage drop across the diode during conduction and affects power dissipation and circuit efficiency. The B330B-13 specifies 500mV @ 3A. Substitutes with lower forward voltage (such as SK43BL-TP at 450mV @ 4A) reduce power loss, while substitutes with higher forward voltage (such as CMSH3-40M at 550mV @ 3A) increase power dissipation. Selection depends on thermal management requirements and efficiency specifications.

Q: What is the importance of RoHS compliance in part selection?

A: RoHS compliance indicates conformance to Restriction of Hazardous Substances regulations. ROHS3 compliant parts meet current regulatory requirements for electronic component manufacturing and are required for many commercial and industrial applications. The original B330B-13 is RoHS non-compliant, making compliant substitutes necessary for regulatory adherence.

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