SSL14 R3G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SSL14 R3G is a 40V, 1A Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation in the 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 SSL14 R3G operates across a junction temperature range of -55°C to 125°C and maintains ROHS3 compliance with unlimited moisture sensitivity rating (MSL 1).

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) Maximum @ If	390 mV @ 1 A	mV
Speed - Fast Recovery	≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	200	µA @ 40 V
Technology	Schottky	—
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 125	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SSL14 R3G is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

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

Secondary Considerations:

Voltage - Forward (Vf) Maximum @ If: Acceptable range 390–530 mV @ 1A
Current - Reverse Leakage @ Vr: Acceptable range 50–500 µA @ 40V
Operating Temperature - Junction: Minimum -55°C, maximum 125°C or higher
RoHS and REACH compliance status

Parts are grouped into two categories: Parametric Equivalents (identical electrical and mechanical specifications) and Similar Parts (equivalent electrical performance with minor variations in forward voltage, reverse leakage, or package form factor).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ If (mV)	Ir @ Vr (µA)	Package	Product Status	Temp Range (°C)
SSL14 R3G	Taiwan Semiconductor Corporation	40	1	390 @ 1A	200 @ 40V	DO-214AC, SMA	Discontinued	-55 to 125
SSL14	Taiwan Semiconductor Corporation	40	1	390 @ 1A	200 @ 40V	DO-214AC, SMA	Active	-55 to 125
SSL14H	Taiwan Semiconductor Corporation	40	1	390 @ 1A	200 @ 40V	DO-214AC, SMA	Active	-55 to 125
B140-13-F	Diodes Incorporated	40	1	500 @ 1A	500 @ 40V	DO-214AC, SMA	Active	-65 to 150
B140-E3/5AT	Vishay General Semiconductor - Diodes Division	40	1	520 @ 1A	200 @ 40V	DO-214AC, SMA	Active	-65 to 125
B140-E3/61T	Vishay General Semiconductor - Diodes Division	40	1	520 @ 1A	200 @ 40V	DO-214AC, SMA	Active	-65 to 125
B140B-13-F	Diodes Incorporated	40	1	500 @ 1A	500 @ 40V	DO-214AA, SMB	Active	-65 to 150
B140HB-13-F	Diodes Incorporated	40	1	530 @ 1A	100 @ 40V	DO-214AA, SMB	Active	-55 to 150
B140Q-13-F	Diodes Incorporated	40	1	500 @ 1A	500 @ 40V	DO-214AC, SMA	Active	-65 to 150
B140WS-7	Diodes Incorporated	40	1	620 @ 1A	50 @ 40V	SC-76, SOD-323	Active	-40 to 125
B240A-E3/5AT	Vishay General Semiconductor - Diodes Division	40	2	550 @ 2A	500 @ 40V	DO-214AC, SMA	Active	-65 to 150

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacement):

The SSL14 and SSL14H from Taiwan Semiconductor Corporation are parametric equivalents to the SSL14 R3G. Both maintain identical electrical specifications (40V, 1A, 390 mV forward voltage, 200 µA reverse leakage) and the same DO-214AC (SMA) package. Both parts are currently in active product status with 2100 and 1011 units in stock respectively. The SSL14H carries automotive-grade qualification (AEC-Q101), making it suitable for applications requiring automotive compliance.

Similar Parts with DO-214AC (SMA) Package:

B140-E3/5AT and B140-E3/61T (Vishay) maintain the same 40V, 1A electrical ratings and DO-214AC package. Forward voltage is elevated to 520 mV at 1A compared to the SSL14 R3G baseline of 390 mV. Reverse leakage remains at 200 µA. Operating temperature range extends to -65°C minimum. B140-E3/61T offers higher inventory availability (23,400 units).

B140-13-F and B140Q-13-F (Diodes Incorporated) provide 40V, 1A performance in DO-214AC (SMA) package with forward voltage of 500 mV at 1A. B140Q-13-F includes automotive qualification (AEC-Q101). Reverse leakage is specified at 500 µA. Operating temperature extends to -65°C to 150°C.

Similar Parts with Alternative Packages:

B140B-13-F and B140HB-13-F use the DO-214AA (SMB) package, which is physically larger than the SMA package. Both maintain 40V, 1A electrical specifications. B140HB-13-F offers superior reverse leakage performance (100 µA) and extended temperature range (-55°C to 150°C).

B140WS-7 (Diodes Incorporated) uses the SOD-323 package, a significantly smaller form factor. Forward voltage increases to 620 mV at 1A, and reverse leakage improves to 50 µA. Operating temperature range is -40°C to 125°C.

Higher Current Alternative:

B240A-E3/5AT (Vishay) provides 40V at 2A current rating in the DO-214AC (SMA) package. This part is suitable only when higher current capacity is required and is not a direct replacement for 1A applications.

Compliance and Availability:

All recommended substitutes maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating. SSL14 and SSL14H offer the most direct electrical equivalence. For applications requiring extended temperature range or automotive qualification, B140-E3/61T, B140Q-13-F, or SSL14H are appropriate selections. High inventory availability is confirmed for B140-E3/61T (23,400 units) and B140Q-13-F (40,400 units).

Frequently Asked Questions (FAQ)

Q: Can SSL14 directly replace SSL14 R3G?

A: Yes. The SSL14 is a parametric equivalent with identical electrical specifications (40V, 1A, 390 mV forward voltage, 200 µA reverse leakage) and the same DO-214AC (SMA) package. The primary difference is product status: SSL14 R3G is discontinued while SSL14 is active. SSL14 is available in higher quantity (2100 units in stock).

Q: What is the difference between SSL14 and SSL14H?

A: Both parts are parametric equivalents with identical electrical performance. SSL14H carries automotive-grade qualification (AEC-Q101) and is suitable for automotive applications. Standard SSL14 is suitable for general industrial and consumer applications. Both use the same DO-214AC (SMA) package.

Q: Can B140-E3/61T replace SSL14 R3G?

A: B140-E3/61T is a suitable substitute with the same 40V, 1A electrical ratings and DO-214AC (SMA) package. Forward voltage is 520 mV at 1A compared to SSL14 R3G at 390 mV. This 130 mV increase in forward voltage may affect circuit performance in applications with tight voltage budgets. Reverse leakage remains equivalent at 200 µA. Operating temperature range extends to -65°C minimum, providing improved low-temperature performance.

Q: Why do some alternatives have higher forward voltage?

A: Forward voltage variation is inherent to Schottky diode manufacturing and design. Parts from different manufacturers (Diodes Incorporated, Vishay) may have different semiconductor material compositions and junction designs, resulting in forward voltage specifications ranging from 390 mV to 620 mV at 1A. Circuit design must account for this variation if voltage drop is critical.

Q: Can B140B-13-F or B140HB-13-F be used as drop-in replacements?

A: B140B-13-F and B140HB-13-F use the DO-214AA (SMB) package, which is physically larger than the DO-214AC (SMA) package of the SSL14 R3G. These parts are not drop-in replacements for PCB layouts designed for SMA packages. However, they provide equivalent electrical performance (40V, 1A) and may be suitable for redesigned layouts where the larger SMB footprint is acceptable.

Q: What is the advantage of B140WS-7?

A: B140WS-7 uses the SOD-323 package, which is significantly smaller than SMA, enabling space-constrained designs. Forward voltage is higher at 620 mV, and reverse leakage is superior at 50 µA. Operating temperature range is -40°C to 125°C. This part is suitable only for applications where the smaller package size justifies the higher forward voltage and narrower temperature range.

Q: Is B240A-E3/5AT a suitable replacement?

A: B240A-E3/5AT is not a direct replacement. It provides 40V at 2A current rating, double the SSL14 R3G specification. This part is suitable only when higher current capacity is required. Using a 2A-rated diode in a 1A application is acceptable from an electrical standpoint but represents over-specification and unnecessary cost.

Q: Which substitute offers the best reverse leakage performance?

A: B140WS-7 offers the lowest reverse leakage at 50 µA @ 40V, followed by B140HB-13-F at 100 µA @ 40V. SSL14 R3G, SSL14, SSL14H, and B140-E3/5AT all specify 200 µA @ 40V. B140-13-F and B140Q-13-F specify 500 µA @ 40V. Lower reverse leakage is beneficial in high-impedance circuits and low-power applications.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All recommended substitute parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, matching the SSL14 R3G compliance profile.

Q: Which substitute has the widest operating temperature range?

A: B140-13-F, B140Q-13-F, and B240A-E3/5AT all specify -65°C to 150°C operating range, providing the widest temperature coverage. SSL14 R3G, SSL14, and SSL14H specify -55°C to 125°C. B140WS-7 is limited to -40°C to 125°C.

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