B140-13 Schottky Diode Equivalent & Substitute Parts

Part Overview

The B140-13 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 40 V DC reverse voltage and 1 A average rectified current in a surface mount SMA (DO-214AC) package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The B140-13 operates across a junction temperature range of -65°C to 150°C and exhibits fast recovery characteristics suitable for switching applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500 µA @ 40 V	µA
Capacitance @ Vr, F	110pF @ 4V, 1MHz	pF
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
Technology	Schottky	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the B140-13 is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 40 V minimum
Current - Average Rectified (Io): 1 A minimum
Package / Case: DO-214AC (SMA) surface mount
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Surface Mount

Allowable Variations:

Voltage - Forward (Vf) (Max) @ If: May vary within application tolerance
Current - Reverse Leakage @ Vr: May vary within application tolerance
Capacitance @ Vr, F: May vary or be unspecified
Operating Temperature - Junction: May exceed specified range
RoHS Status: Active parts preferred over obsolete status

Substitute parts are grouped into three categories:

Parametric Equivalents (Diodes Incorporated): Parts B140-13-F and B140Q-13-F maintain identical electrical specifications to the B140-13 with active product status and improved compliance. B140Q-13-F includes automotive qualification (AEC-Q101).

Direct Manufacturer Equivalents (Alternative Suppliers): Parts from onsemi (MBRA140T3G) and Comchip Technology (CDBA140-G, CDBA140LL-HF, CDBA140SL-HF) meet the core electrical requirements in the same package with active status.

Higher Voltage Alternatives (Vishay): Parts B150-M3/5AT and B150-M3/61T provide 50 V reverse voltage rating with 1 A current rating, suitable for applications requiring additional voltage margin.

Reduced Current Alternative (Infineon): Part BAT165E6327HTSA1 operates at 750 mA (below 1 A requirement) in a smaller SOD-323 package, applicable only where current requirements do not exceed 750 mA.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Ir @ Vr [µA]	Package	Product Status	RoHS Status
B140-13	Diodes Incorporated	40	1	500 @ 1A	500 @ 40V	DO-214AC (SMA)	Obsolete	Non-compliant
B140-13-F	Diodes Incorporated	40	1	500 @ 1A	500 @ 40V	DO-214AC (SMA)	Active	ROHS3 Compliant
B140Q-13-F	Diodes Incorporated	40	1	500 @ 1A	500 @ 40V	DO-214AC (SMA)	Active	ROHS3 Compliant
MBRA140T3G	onsemi	40	1	550 @ 1A	500 @ 40V	DO-214AC (SMA)	Active	ROHS3 Compliant
B150-M3/5AT	Vishay General Semiconductor	50	1	750 @ 1A	200 @ 50V	DO-214AC (SMA)	Active	ROHS3 Compliant
B150-M3/61T	Vishay General Semiconductor	50	1	750 @ 1A	200 @ 50V	DO-214AC (SMA)	Active	ROHS3 Compliant
BAT165E6327HTSA1	Infineon Technologies	40	0.75	740 @ 0.75A	50 @ 40V	SC-76 (SOD-323)	Active	ROHS3 Compliant
CDBA140-G	Comchip Technology	40	1	500 @ 1A	500 @ 40V	DO-214AC (SMA)	Active	ROHS3 Compliant
CDBA140LL-HF	Comchip Technology	40	1	350 @ 1A	1000 @ 40V	DO-214AC (SMA)	Active	ROHS3 Compliant
CDBA140SL-G	Comchip Technology	40	1	310 @ 1A	1000 @ 40V	DO-214AC (SMA)	Active	ROHS3 Compliant
CDBA140SL-HF	Comchip Technology	40	1.4	330 @ 1A	1000 @ 40V	DO-214AC (SMA)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Identical Specifications, Active Status):

B140-13-F and B140Q-13-F from Diodes Incorporated are direct parametric equivalents with identical electrical characteristics. Both parts are in active production status with ROHS3 compliance. B140Q-13-F includes AEC-Q101 automotive qualification, suitable for automotive and industrial applications requiring enhanced reliability documentation.

Alternative Manufacturer Equivalents (Same Electrical Class):

CDBA140-G from Comchip Technology provides identical voltage and current ratings in the same DO-214AC package with active status. MBRA140T3G from onsemi meets all core requirements with a forward voltage specification of 550 mV (50 mV higher than B140-13), acceptable for applications with forward voltage tolerance.

Higher Performance Alternatives (Lower Forward Voltage):

CDBA140LL-HF and CDBA140SL-HF from Comchip Technology offer reduced forward voltage (350 mV and 330 mV respectively) compared to the B140-13 (500 mV), resulting in lower power dissipation. CDBA140SL-HF additionally provides 1.4 A current rating, offering design margin. These parts operate at reduced junction temperature maximums (-50°C to 100°C and -50°C to 100°C respectively), requiring thermal verification for applications exceeding 100°C ambient conditions.

Higher Voltage Alternatives (Increased Voltage Margin):

B150-M3/5AT and B150-M3/61T from Vishay provide 50 V reverse voltage rating with identical 1 A current rating. These parts are suitable for applications requiring additional voltage safety margin. Forward voltage is specified at 750 mV, requiring circuit verification for power dissipation impact.

Reduced Current Alternative (Package Miniaturization):

BAT165E6327HTSA1 from Infineon operates at 750 mA maximum current in a smaller SOD-323 package. This part is applicable only for circuits where current requirements do not exceed 750 mA and where package size reduction is beneficial.

Frequently Asked Questions (FAQ)

Q: Can B140-13-F directly replace B140-13 without circuit modification?

A: Yes. B140-13-F maintains identical electrical specifications (40 V, 1 A, 500 mV forward voltage, fast recovery) and the same DO-214AC package. The primary difference is active product status and ROHS3 compliance versus the obsolete, non-compliant B140-13.

Q: What is the difference between B140-13-F and B140Q-13-F?

A: Both parts are parametrically identical with 40 V, 1 A ratings and 500 mV forward voltage. B140Q-13-F includes AEC-Q101 automotive qualification, providing additional reliability documentation for automotive and safety-critical applications. Standard industrial applications may use either part.

Q: Can CDBA140LL-HF replace B140-13 in all applications?

A: CDBA140LL-HF meets voltage and current requirements but operates at reduced junction temperature maximum (100°C versus B140-13's 150°C). Applications operating above 100°C junction temperature require thermal analysis. Forward voltage is lower (350 mV versus 500 mV), reducing power dissipation but requiring circuit verification for bias point changes.

Q: Why is BAT165E6327HTSA1 listed as a substitute if it only handles 750 mA?

A: BAT165E6327HTSA1 is applicable only for circuits where average rectified current does not exceed 750 mA. It provides a smaller SOD-323 package option for space-constrained designs operating below 750 mA. It is not a general replacement for 1 A applications.

Q: Can B150-M3/5AT or B150-M3/61T be used instead of B140-13?

A: Yes, for applications where 50 V reverse voltage is acceptable. These parts provide additional voltage margin and identical 1 A current rating in the same DO-214AC package. Forward voltage is higher (750 mV versus 500 mV), increasing power dissipation. Circuit verification is required for bias point and thermal impact.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel packaging is supplied on continuous reel for automated pick-and-place assembly. Cut Tape & Digi-Reel packaging is supplied in cut tape format or on Digi-Reel for manual or semi-automated handling. Both formats contain identical components; packaging selection depends on assembly equipment and volume requirements.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant and REACH unaffected, except the original B140-13 which is non-compliant and REACH affected. Active production parts meet current environmental regulations.

Q: Which substitute offers the best forward voltage match to B140-13?

A: B140-13-F, B140Q-13-F, MBRA140T3G, and CDBA140-G all specify 500 mV forward voltage at 1 A, matching the B140-13 specification. CDBA140LL-HF and CDBA140SL-HF offer lower forward voltage (350 mV and 330 mV) for reduced power dissipation applications.

Q: Can CDBA140SL-HF be used in circuits designed for 1 A if it is rated for 1.4 A?

A: Yes. CDBA140SL-HF is rated for 1.4 A maximum, so it safely handles 1 A operation. The higher current rating provides design margin. Operating temperature range (-50°C to 100°C) must be verified against application requirements.

Q: What is the significance of fast recovery ≤ 500ns specification?

A: Fast recovery ≤ 500ns indicates the diode transitions from forward to reverse bias within 500 nanoseconds at currents exceeding 200 mA. This specification is maintained across all listed substitute parts, ensuring switching performance compatibility in rectifier and switching applications.

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