SS14 R3G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS14 R3G is a 40V, 1A Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation in DO-214AC (SMA) surface mount 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 operates across a junction temperature range of -55°C to 125°C and complies with RoHS3 standards.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	200 µA @ 40 V
Package / Case	DO-214AC, SMA
Operating Temperature - Junction	-55°C ~ 125°C
Technology	Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SS14 R3G is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 40 V minimum
Current - Average Rectified (Io): 1 A minimum
Package / Case: DO-214AC (SMA) for direct pin-compatible replacement
Technology: Schottky diode classification
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Substitution Categories:

Parametric Equivalents maintain identical electrical specifications (40V, 1A, 500mV forward voltage) and package format, enabling direct replacement without circuit modification.

Similar Parts share the same voltage and current ratings with the DO-214AC (SMA) package but may exhibit variations in forward voltage, reverse leakage current, or temperature range. These parts are functionally compatible within the same application class.

Package Variants maintain electrical specifications but utilize alternative surface mount packages (SMB, SOD-323), requiring PCB layout modification for implementation.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Ir @ Vr	Package	Temp Range	Product Status
SS14 R3G	Taiwan Semiconductor Corporation	40 V	1 A	500 mV @ 1 A	200 µA @ 40 V	DO-214AC (SMA)	-55°C ~ 125°C	Discontinued
SS14	SMC Diode Solutions	100 V	1 A	850 mV @ 1 A	500 µA @ 100 V	DO-214AC (SMA)	-55°C ~ 150°C	Active
SS14H	Taiwan Semiconductor Corporation	40 V	1 A	500 mV @ 1 A	200 µA @ 40 V	DO-214AC (SMA)	-55°C ~ 125°C	Active
B140-13-F	Diodes Incorporated	40 V	1 A	500 mV @ 1 A	500 µA @ 40 V	DO-214AC (SMA)	-65°C ~ 150°C	Active
B140-E3/5AT	Vishay General Semiconductor - Diodes Division	40 V	1 A	520 mV @ 1 A	200 µA @ 40 V	DO-214AC (SMA)	-65°C ~ 125°C	Active
B140-E3/61T	Vishay General Semiconductor - Diodes Division	40 V	1 A	520 mV @ 1 A	200 µA @ 40 V	DO-214AC (SMA)	-65°C ~ 125°C	Active
B140B-13-F	Diodes Incorporated	40 V	1 A	500 mV @ 1 A	500 µA @ 40 V	DO-214AA (SMB)	-65°C ~ 150°C	Active
B140HB-13-F	Diodes Incorporated	40 V	1 A	530 mV @ 1 A	100 µA @ 40 V	DO-214AA (SMB)	-55°C ~ 150°C	Active
B140Q-13-F	Diodes Incorporated	40 V	1 A	500 mV @ 1 A	500 µA @ 40 V	DO-214AC (SMA)	-65°C ~ 150°C	Active
B140WS-7	Diodes Incorporated	40 V	1 A	620 mV @ 1 A	50 µA @ 40 V	SC-76 (SOD-323)	-40°C ~ 125°C	Active
B240A-E3/5AT	Vishay General Semiconductor - Diodes Division	40 V	2 A	550 mV @ 2 A	500 µA @ 40 V	DO-214AC (SMA)	-65°C ~ 150°C	Active

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalents):

SS14H (Taiwan Semiconductor Corporation) provides direct functional equivalence to the SS14 R3G. Both parts share identical electrical specifications (40V, 1A, 500mV forward voltage, 200µA reverse leakage) and the same DO-214AC (SMA) package. SS14H is AEC-Q101 qualified for automotive applications and maintains active product status. This part is the primary recommendation for direct substitution.

Compatible Alternatives (Similar Parts - DO-214AC/SMA Package):

B140-13-F, B140-E3/5AT, B140-E3/61T, and B140Q-13-F all maintain the 40V, 1A rating and DO-214AC (SMA) package configuration. These parts are pin-compatible and functionally suitable for the SS14 R3G application. Differences in forward voltage (520mV maximum for Vishay parts, 500mV for Diodes Incorporated B140-13-F and B140Q-13-F) and reverse leakage current (200µA to 500µA) are within acceptable tolerance for most rectification applications. B140Q-13-F includes AEC-Q101 automotive qualification. All listed alternatives maintain active product status and RoHS3 compliance.

Package Variant Alternatives:

B140B-13-F and B140HB-13-F utilize the DO-214AA (SMB) package instead of SMA, requiring PCB layout modification. These parts maintain 40V, 1A electrical specifications and are suitable for applications where SMB package footprint is acceptable.

B140WS-7 utilizes the SOD-323 package, providing the smallest form factor among alternatives. This part maintains 40V, 1A specifications but exhibits higher forward voltage (620mV @ 1A) and operates across a narrower temperature range (-40°C to 125°C).

Higher Current Alternative:

B240A-E3/5AT provides 2A average rectified current in the same DO-214AC (SMA) package, suitable for applications requiring increased current capacity while maintaining 40V reverse voltage rating.

Voltage Upgrade Alternative:

SS14 (SMC Diode Solutions) provides 100V reverse voltage rating in the DO-214AC (SMA) package with 1A current rating. This part is suitable for applications requiring higher voltage margin, though forward voltage increases to 850mV @ 1A.

Frequently Asked Questions (FAQ)

Q: Can I use B140-13-F as a direct replacement for SS14 R3G?

A: Yes. B140-13-F maintains identical voltage (40V) and current (1A) ratings with the same DO-214AC (SMA) package. Forward voltage is 500mV @ 1A, matching the original specification. The part is pin-compatible and functionally equivalent for rectification applications.

Q: What is the difference between SS14H and SS14 R3G?

A: SS14H and SS14 R3G share identical electrical specifications (40V, 1A, 500mV forward voltage, 200µA reverse leakage) and package format (DO-214AC/SMA). The primary difference is product status: SS14 R3G is discontinued while SS14H is active. SS14H includes AEC-Q101 automotive qualification. Both operate across -55°C to 125°C.

Q: Why does the SMC Diode Solutions SS14 show 100V instead of 40V?

A: The SMC Diode Solutions SS14 is a different product variant with upgraded voltage rating (100V) compared to the original SS14 R3G (40V). While both share the same base part number and package, the higher voltage rating results in increased forward voltage (850mV @ 1A). This part is suitable only for applications where the higher voltage rating is required or beneficial.

Q: Can I use B140B-13-F or B140HB-13-F in place of SS14 R3G?

A: B140B-13-F and B140HB-13-F are functionally equivalent in electrical specifications (40V, 1A) but utilize the DO-214AA (SMB) package instead of DO-214AC (SMA). Direct PCB substitution is not possible without layout modification. These parts are suitable only if the SMB package footprint can be accommodated in the design.

Q: What is the advantage of B140Q-13-F over other B140 variants?

A: B140Q-13-F includes AEC-Q101 automotive qualification and operates across an extended temperature range (-65°C to 150°C) compared to the original SS14 R3G (-55°C to 125°C). Electrical specifications (40V, 1A, 500mV forward voltage) are identical. This part is recommended for automotive applications requiring qualification documentation.

Q: Should I use B240A-E3/5AT if my circuit only requires 1A?

A: B240A-E3/5AT provides 2A average rectified current in the same DO-214AC (SMA) package. Using a higher-rated component for a 1A application is acceptable from a functional standpoint. The part will operate within safe margins. However, forward voltage increases to 550mV @ 2A, which may affect circuit efficiency compared to 1A-rated alternatives.

Q: Is B140WS-7 suitable for my application?

A: B140WS-7 maintains 40V, 1A specifications but utilizes the SOD-323 package, requiring PCB layout modification. Forward voltage is higher at 620mV @ 1A, and the operating temperature range is narrower (-40°C to 125°C). This part is suitable only if the smaller package size justifies the layout change and higher forward voltage is acceptable.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance, matching the original SS14 R3G specification.

Q: What packaging options are available for 40V, 1A Schottky diodes?

A: The primary packaging options for 40V, 1A Schottky diodes are DO-214AC (SMA), DO-214AA (SMB), and SOD-323. DO-214AC (SMA) is the most common and matches the original SS14 R3G package. SMB and SOD-323 packages require PCB layout modification but may be preferred for specific design constraints.

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