B240-13 Schottky Diode 40V 2A SMB Equivalent & Substitute Parts

Part Overview

The B240-13 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 40V DC reverse voltage and 2A average rectified current in a surface mount SMB (DO-214AA) package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement.

The B240-13 operates across a junction temperature range of -65°C to 150°C with fast recovery characteristics suitable for 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)	40	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 2 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500	µA @ 40 V
Capacitance @ Vr, F	200	pF @ 4V, 1MHz
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65 to 150	°C
Technology	Schottky	—

Substitute Part Grouping Explanation

Substitution of the B240-13 is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 40V
Technology: Schottky
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Current Rating Consideration: Substitute parts are grouped into two categories based on average rectified current (Io):

Direct Equivalents (2A rated): Parts with identical 2A current rating and all matching mandatory parameters
Higher Current Substitutes (≥2A rated): Parts with current ratings equal to or exceeding 2A, maintaining all mandatory parameters

Compliance Consideration: The B240-13 is RoHS non-compliant and discontinued. Active substitutes must be RoHS3 compliant and carry active product status for ongoing availability.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf @ If	Package	Temp Range	Product Status	RoHS Status
B240-13	Diodes Incorporated	40V	2A	500 mV @ 2A	DO-214AA, SMB	-65 to 150°C	Discontinued	Non-compliant
B240-13-F	Diodes Incorporated	40V	2A	500 mV @ 2A	DO-214AA, SMB	-65 to 150°C	Active	ROHS3 Compliant
B240Q-13-F	Diodes Incorporated	40V	2A	500 mV @ 2A	DO-214AA, SMB	-65 to 150°C	Active	ROHS3 Compliant
CDBB240-G	Comchip Technology	40V	2A	500 mV @ 2A	DO-214AA, SMB	-55 to 125°C	Active	ROHS3 Compliant
CDBB240-HF	Comchip Technology	40V	2A	500 mV @ 2A	DO-214AA, SMB	-50 to 150°C	Active	ROHS3 Compliant
SK34B-LTP	Micro Commercial Co	40V	3A	500 mV @ 3A	DO-214AA, SMB	-55 to 150°C	Active	ROHS3 Compliant
SK44BL-TP	Micro Commercial Co	40V	4A	450 mV @ 4A	DO-214AA, SMB	-55 to 150°C	Active	ROHS3 Compliant
STPS140U	STMicroelectronics	40V	1A	550 mV @ 1A	DO-214AA, SMB	–40 to 150°C	Active	ROHS3 Compliant
STPS1L40U	STMicroelectronics	40V	1A	500 mV @ 1A	DO-214AA, SMB	–40 to 150°C	Active	ROHS3 Compliant
STPS1L40UY	STMicroelectronics	40V	1A	500 mV @ 1A	DO-214AA, SMB	-40 to 150°C	Active	ROHS3 Compliant
BAT165E6327HTSA1	Infineon Technologies	40V	750mA	740 mV @ 750mA	SC-76, SOD-323	–40 to 150°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (Recommended Primary Substitutes):

The B240-13-F and B240Q-13-F from Diodes Incorporated are direct parametric equivalents with identical electrical specifications. Both are active products with ROHS3 compliance. The B240-13-F is packaged in Cut Tape & Digi-Reel format, while B240Q-13-F includes automotive-grade qualification (AEC-Q101) in Tape & Reel packaging. Selection between these depends on packaging requirements and automotive application needs.

Secondary Equivalents (Same Current Rating):

CDBB240-G and CDBB240-HF from Comchip Technology maintain the 2A current rating and 40V reverse voltage specification. CDBB240-HF extends the upper junction temperature to 150°C, matching the B240-13 thermal range. Both are active with ROHS3 compliance.

Higher Current Substitutes (Uprated Current):

SK34B-LTP (3A) and SK44BL-TP (4A) from Micro Commercial Co provide higher current capacity while maintaining 40V reverse voltage and SMB package compatibility. These are suitable for applications where current margin is required. SK44BL-TP offers lower forward voltage (450 mV @ 4A) compared to the B240-13 specification.

Lower Current Alternatives (Downrated Current):

STPS140U, STPS1L40U, and STPS1L40UY from STMicroelectronics are rated for 1A operation. These are applicable only where circuit current requirements do not exceed 1A. STPS1L40UY includes automotive-grade qualification.

Package Variant:

BAT165E6327HTSA1 from Infineon Technologies operates at 40V with 750mA rating but uses SOD-323 package (SC-76) instead of SMB. This part is not a direct substitute due to package incompatibility with SMB footprints.

Compliance Status:

All recommended substitutes carry ROHS3 compliance and active product status, addressing the discontinued and non-compliant status of the B240-13.

Frequently Asked Questions (FAQ)

Q: Can B240-13-F directly replace B240-13 in existing designs?

A: Yes. B240-13-F is a parametric equivalent with identical voltage, current, and forward voltage specifications. It maintains the same DO-214AA SMB package and operating temperature range (-65°C to 150°C). The primary difference is active product status and ROHS3 compliance.

Q: What is the difference between B240-13-F and B240Q-13-F?

A: Both are parametric equivalents from Diodes Incorporated with identical electrical specifications. B240Q-13-F includes automotive-grade qualification (AEC-Q101) and is supplied in Tape & Reel packaging. B240-13-F is supplied in Cut Tape & Digi-Reel format. Selection depends on packaging requirements and automotive application certification needs.

Q: Can I use SK34B-LTP (3A) or SK44BL-TP (4A) as substitutes?

A: Yes, for applications where the circuit current does not exceed the B240-13 rating of 2A. These higher-rated parts maintain 40V reverse voltage and SMB package compatibility. They provide additional current margin and are suitable for designs with potential future current increases. Verify that the lower forward voltage of SK44BL-TP (450 mV @ 4A) does not affect circuit performance.

Q: Why is BAT165E6327HTSA1 listed if it cannot replace B240-13?

A: BAT165E6327HTSA1 is included as a reference for applications requiring 40V Schottky diode functionality. However, it uses SOD-323 package (SC-76) instead of SMB, making it incompatible with existing B240-13 PCB footprints. It is not a direct substitute.

Q: Are STPS140U and STPS1L40U suitable substitutes?

A: These parts are suitable only for applications where circuit current requirements do not exceed 1A. The B240-13 is rated for 2A, so these lower-rated parts represent a downgrade in current capacity. Use only if circuit analysis confirms maximum current draw remains below 1A.

Q: What is the significance of the automotive-grade designation on B240Q-13-F and STPS1L40UY?

A: Automotive-grade parts (AEC-Q101 qualified) meet additional reliability and qualification standards required for automotive applications. These parts are suitable for both general industrial and automotive use. Non-automotive-grade parts are suitable for general industrial applications only.

Q: Do all substitute parts have the same moisture sensitivity level?

A: Yes. All listed parts carry Moisture Sensitivity Level (MSL) 1 (Unlimited), matching the B240-13 specification. This indicates no special moisture handling precautions are required during storage or assembly.

Q: What packaging options are available for direct equivalents?

A: B240-13-F is supplied in Cut Tape & Digi-Reel format. B240Q-13-F is supplied in Tape & Reel format. CDBB240-G and CDBB240-HF are supplied in Tape & Reel format. Selection depends on assembly line requirements and volume needs.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status. The original B240-13 is RoHS non-compliant, making compliance a key differentiator for new designs and procurement.

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