B240A-13 Schottky Diode 40V 2A SMA Equivalent & Substitute Parts

Part Overview

The B240A-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 SMA (DO-214AC) package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing production and repair applications. The device operates across a junction temperature range of -65°C to 150°C and exhibits fast recovery characteristics suitable for high-frequency switching applications.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 2 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	500 µA @ 40 V	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-65°C ~ 150°C	—
Mounting Type	Surface Mount	—
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the B240A-13 is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 40V minimum
Current - Average Rectified (Io): 2A minimum
Technology: Schottky
Package / Case: DO-214AC or SMA compatible
Mounting Type: Surface Mount
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Substitution Categories:

Direct Equivalents (Identical Electrical Ratings): Parts matching 40V, 2A specifications with identical forward voltage and reverse leakage characteristics within the same package family.

Parametric Equivalents (Automotive Grade): Parts meeting or exceeding the 40V, 2A ratings with AEC-Q101 qualification, suitable for applications requiring automotive-grade reliability.

Functional Equivalents (Higher Current Rating): Parts rated for 40V at 3A current, providing design margin for applications where the 2A rating is marginal. These parts are pin-compatible and functionally interchangeable with derating considerations.

Cross-Manufacturer Equivalents: Parts from alternative manufacturers (Vishay, Comchip, onsemi, NXP, Rohm) meeting the same electrical specifications and package requirements.

Package Variant Equivalents: Parts in alternative surface mount packages (SOD-128) meeting electrical specifications but requiring PCB layout modification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Ir @ Vr [µA]	Package	Product Status	RoHS Status
B240A-13	Diodes Incorporated	40	2	500 @ 2A	500 @ 40V	DO-214AC, SMA	Discontinued	Non-compliant
B240A-13-F	Diodes Incorporated	40	2	500 @ 2A	500 @ 40V	DO-214AC, SMA	Active	ROHS3 Compliant
B240AQ-13-F	Diodes Incorporated	40	2	500 @ 2A	500 @ 40V	DO-214AC, SMA	Active	ROHS3 Compliant
B240A-M3/61T	Vishay General Semiconductor	40	2	550 @ 2A	500 @ 40V	DO-214AC, SMA	Active	ROHS3 Compliant
B340A-M3/5AT	Vishay General Semiconductor	40	3	550 @ 3A	500 @ 40V	DO-214AC, SMA	Active	ROHS3 Compliant
CDBA240-G	Comchip Technology	40	2	500 @ 2A	500 @ 40V	DO-214AC, SMA	Active	ROHS3 Compliant
CDBA240-HF	Comchip Technology	40	2	500 @ 2A	500 @ 40V	DO-214AC, SMA	Active	ROHS3 Compliant
MBRA340T3G	onsemi	40	3	450 @ 3A	300 @ 40V	DO-214AC, SMA	Active	ROHS3 Compliant
PMEG4020EP,115	NXP Semiconductors	40	2	490 @ 2A	100 @ 40V	SOD-128	Active	ROHS3 Compliant
RB056L-40TE25	Rohm Semiconductor	40	3	670 @ 3A	50 @ 40V	DO-214AC, SMA	Not For New Designs	ROHS3 Compliant
SS14-LTP	Micro Commercial Co	40	1	500 @ 1A	500 @ 40V	DO-214AC, SMA	Active	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Identical Specifications):

B240A-13-F and B240AQ-13-F are direct replacements for the discontinued B240A-13. Both parts maintain identical electrical specifications (40V, 2A, 500mV forward voltage) and package compatibility. B240A-13-F is available in Cut Tape and Digi-Reel packaging with 125,300 units in stock. B240AQ-13-F includes AEC-Q101 automotive qualification and is available in Tape & Reel format with 14,162 units in stock. Both are ROHS3 compliant, addressing the non-compliance status of the original part.

Tier 2 - Cross-Manufacturer Equivalents (Same Electrical Ratings):

CDBA240-G and CDBA240-HF from Comchip Technology provide identical 40V, 2A specifications with 500mV forward voltage and are available in Tape & Reel packaging. CDBA240-G has 5,100 units in stock; CDBA240-HF has 2,373 units. Both are ROHS3 compliant and suitable for direct substitution where manufacturer diversity is required.

Tier 3 - Higher Current Rating (Functional Equivalents):

B340A-M3/5AT (Vishay), MBRA340T3G (onsemi), and RB056L-40TE25 (Rohm) are rated for 40V at 3A current. These parts are pin-compatible with the B240A-13 in DO-214AC/SMA packages and provide design margin for applications where 2A is marginal. MBRA340T3G offers superior reverse leakage characteristics (300µA vs. 500µA) and lower forward voltage (450mV @ 3A). RB056L-40TE25 is designated "Not For New Designs" and should be avoided for new product development.

Tier 4 - Alternative Package (Package Variant):

PMEG4020EP,115 from NXP Semiconductors maintains 40V, 2A specifications but uses SOD-128 package instead of DO-214AC/SMA. This part requires PCB layout modification and is suitable only when package footprint change is acceptable. It offers superior reverse leakage (100µA) and lower forward voltage (490mV @ 2A).

Tier 5 - Lower Current Rating (Not Recommended):

SS14-LTP from Micro Commercial Co is rated for 40V at 1A only. This part does not meet the 2A current requirement and should not be used as a substitute for the B240A-13.

Compliance Considerations:

The original B240A-13 is RoHS non-compliant. All recommended Tier 1, 2, and 3 substitutes are ROHS3 compliant, meeting current regulatory requirements. All parts maintain MSL 1 (Unlimited) moisture sensitivity rating and are suitable for standard PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Can B240A-13-F be used as a direct replacement for B240A-13?

A: Yes. B240A-13-F is a direct replacement with identical electrical specifications (40V, 2A, 500mV forward voltage) and package compatibility (DO-214AC/SMA). The primary difference is product status (Active vs. Discontinued) and RoHS compliance (ROHS3 vs. non-compliant). B240A-13-F is available in higher quantities (125,300 units) and is the recommended replacement.

Q: What is the difference between B240A-13-F and B240AQ-13-F?

A: Both parts have identical electrical specifications and package compatibility. B240AQ-13-F includes AEC-Q101 automotive qualification and is supplied in Tape & Reel packaging, making it suitable for automotive applications. B240A-13-F is available in Cut Tape and Digi-Reel formats. Selection depends on application requirements and packaging preference.

Q: Can I use a 3A rated diode (B340A-M3/5AT, MBRA340T3G) instead of the 2A B240A-13?

A: Yes. The 3A rated parts are pin-compatible in DO-214AC/SMA packages and provide design margin. However, they are functional equivalents rather than direct replacements. Use 3A parts only when the application can tolerate the different forward voltage characteristics or when design margin is beneficial. MBRA340T3G offers lower forward voltage (450mV @ 3A) compared to the original 500mV @ 2A specification.

Q: Why is the PMEG4020EP,115 listed as a substitute if it uses a different package?

A: PMEG4020EP,115 maintains identical electrical specifications (40V, 2A) and is functionally equivalent. However, it uses SOD-128 package instead of DO-214AC/SMA, requiring PCB layout modification. This part is listed for applications where package change is acceptable and where superior reverse leakage (100µA) is beneficial.

Q: Should I use RB056L-40TE25 as a substitute?

A: No. RB056L-40TE25 is designated "Not For New Designs" by the manufacturer. While it meets the 40V, 3A specifications, its discontinued design status makes it unsuitable for new product development. Use Tier 1 or Tier 2 alternatives instead.

Q: What is the significance of the "-F" suffix in B240A-13-F?

A: The "-F" suffix indicates the part is supplied in Cut Tape and Digi-Reel packaging formats, as opposed to alternative packaging options. This designation does not affect electrical specifications or functionality.

Q: Are all substitute parts RoHS compliant?

A: All recommended Tier 1, 2, and 3 substitutes are ROHS3 compliant. The original B240A-13 is RoHS non-compliant. Substitution with compliant parts addresses regulatory requirements for new designs and production.

Q: Can I use SS14-LTP as a substitute?

A: No. SS14-LTP is rated for 40V at 1A only, which does not meet the 2A current requirement of the B240A-13. This part is unsuitable for direct substitution.

Q: What are the key parameters I should verify when selecting a substitute?

A: Verify the following parameters match or exceed the B240A-13 specifications: Voltage - DC Reverse (Vr) minimum 40V, Current - Average Rectified (Io) minimum 2A, Technology (Schottky), Package compatibility (DO-214AC/SMA preferred), and Operating Temperature range (-65°C to 150°C minimum). Forward voltage and reverse leakage may vary within acceptable limits depending on application requirements.

Q: Is there a performance difference between Diodes Incorporated B240A-13-F and Comchip CDBA240-G?

A: Both parts have identical electrical specifications (40V, 2A, 500mV forward voltage, 500µA reverse leakage). The primary difference is manufacturer. Selection between them depends on supply chain requirements, inventory availability, and manufacturer preference. B240A-13-F has significantly higher inventory (125,300 units vs. 5,100 units).

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