SSL14HR3G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SSL14HR3G 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 continuity. The part carries automotive-grade qualification (AEC-Q101) and ROHS3 compliance, making it suitable for automotive and industrial applications requiring fast recovery rectification.

Key Parameters

Parameter	Value
Manufacturer Part Number	SSL14HR3G
Manufacturer	Taiwan Semiconductor Corporation
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	390 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
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SSL14HR3G is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 40 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Technology: Schottky rectifier type
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Compatibility Criteria:

Package / Case: DO-214AC (SMA) for direct pin-compatible substitution, or alternative surface mount packages for board redesign scenarios
Mounting Type: Surface Mount

Compliance & Qualification Criteria:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories:

Parametric Equivalents: Parts with identical electrical specifications (40V, 1A) and same package (DO-214AC/SMA), manufactured by Taiwan Semiconductor Corporation. These provide direct functional replacement.

Similar Parts: Parts meeting the core electrical requirements (40V, 1A Schottky) but with variations in forward voltage, reverse leakage current, operating temperature range, or alternative surface mount packages (SMB, SOD-323). These require board-level evaluation for compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Reverse Leakage @ Vr	Package	Operating Temp (Junction)	Grade	AEC-Q101	Product Status
SSL14HR3G	Taiwan Semiconductor	40 V	1 A	390 mV @ 1 A	200 µA @ 40 V	DO-214AC (SMA)	-55°C ~ 125°C	Automotive	Yes	Discontinued
SSL14	Taiwan Semiconductor	40 V	1 A	390 mV @ 1 A	200 µA @ 40 V	DO-214AC (SMA)	-55°C ~ 125°C	Standard	No	Active
SSL14H	Taiwan Semiconductor	40 V	1 A	390 mV @ 1 A	200 µA @ 40 V	DO-214AC (SMA)	-55°C ~ 125°C	Automotive	Yes	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	Standard	No	Active
B140-E3/5AT	Vishay General Semiconductor	40 V	1 A	520 mV @ 1 A	200 µA @ 40 V	DO-214AC (SMA)	-65°C ~ 125°C	Standard	No	Active
B140-E3/61T	Vishay General Semiconductor	40 V	1 A	520 mV @ 1 A	200 µA @ 40 V	DO-214AC (SMA)	-65°C ~ 125°C	Standard	No	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	Standard	No	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	Standard	No	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	Automotive	Yes	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	Standard	No	Active
B240A-E3/5AT	Vishay General Semiconductor	40 V	2 A	550 mV @ 2 A	500 µA @ 40 V	DO-214AC (SMA)	-65°C ~ 150°C	Standard	No	Active

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent):

SSL14H is the primary direct replacement for SSL14HR3G. Both parts share identical electrical specifications (40V, 1A, 390mV forward voltage, 200µA reverse leakage) and package configuration (DO-214AC/SMA). SSL14H carries automotive-grade qualification with AEC-Q101 certification and is currently in active production status. This part provides pin-for-pin and functional equivalence without circuit redesign.

SSL14 is an alternative parametric equivalent with identical electrical characteristics but standard-grade classification without automotive qualification. This part is suitable for non-automotive applications where AEC-Q101 certification is not required.

Automotive-Grade Alternatives:

B140Q-13-F (Diodes Incorporated) is an automotive-qualified alternative (AEC-Q101) in DO-214AC/SMA package. Forward voltage is elevated to 500mV at 1A and reverse leakage increases to 500µA at 40V compared to the original specification. Operating temperature range extends to -65°C ~ 150°C. This part is suitable for automotive applications where the higher forward voltage and leakage characteristics are acceptable.

Standard-Grade Alternatives (DO-214AC/SMA Package):

B140-E3/5AT and B140-E3/61T (Vishay General Semiconductor) provide 40V, 1A operation in DO-214AC/SMA package with forward voltage of 520mV at 1A and reverse leakage of 200µA at 40V. Operating temperature range is -65°C ~ 125°C. These parts lack automotive qualification.

B140-13-F (Diodes Incorporated) operates at 40V, 1A with forward voltage of 500mV at 1A and reverse leakage of 500µA at 40V in DO-214AC/SMA package. Operating temperature range extends to -65°C ~ 150°C. This part lacks automotive qualification.

Alternative Package Options:

B140B-13-F and B140HB-13-F are available in DO-214AA (SMB) package for applications requiring larger surface mount footprint. Both maintain 40V, 1A electrical specifications with variations in forward voltage and reverse leakage characteristics.

B140WS-7 (Diodes Incorporated) is available in SC-76 (SOD-323) package for space-constrained applications. This part exhibits higher forward voltage (620mV at 1A) and lower reverse leakage (50µA at 40V) with operating temperature range of -40°C ~ 125°C.

Higher Current Alternative:

B240A-E3/5AT (Vishay General Semiconductor) provides 40V, 2A operation in DO-214AC/SMA package. This part is suitable for applications requiring increased current capacity while maintaining the same package footprint.

Frequently Asked Questions (FAQ)

Q: Can SSL14 be used as a direct replacement for SSL14HR3G?

A: SSL14 shares identical electrical specifications and package configuration with SSL14HR3G. However, SSL14 lacks automotive-grade qualification and AEC-Q101 certification. Use SSL14 only in non-automotive applications where automotive qualification is not required. For automotive applications, use SSL14H instead.

Q: What is the difference between SSL14H and SSL14HR3G?

A: SSL14H and SSL14HR3G are parametrically identical with 40V, 1A ratings, 390mV forward voltage at 1A, and 200µA reverse leakage at 40V. Both are in DO-214AC/SMA package with automotive-grade qualification and AEC-Q101 certification. The primary difference is product status: SSL14HR3G is discontinued while SSL14H is in active production.

Q: Can I use B140-E3/61T as a substitute for SSL14HR3G in an automotive application?

A: B140-E3/61T meets the core electrical requirements (40V, 1A) and uses the same DO-214AC/SMA package. However, it lacks automotive-grade qualification and AEC-Q101 certification. Forward voltage is higher at 520mV compared to 390mV for the original part. Use this part only in non-automotive applications or where automotive qualification is not mandated.

Q: Why does B140Q-13-F have higher forward voltage than SSL14HR3G?

A: Forward voltage variation is a normal characteristic difference between different manufacturers' Schottky diode designs. B140Q-13-F exhibits 500mV forward voltage at 1A compared to 390mV for SSL14HR3G. This difference affects power dissipation and thermal performance. Verify that the higher forward voltage is acceptable for your circuit's voltage regulation and thermal requirements.

Q: Can I use B140B-13-F or B140HB-13-F as replacements?

A: B140B-13-F and B140HB-13-F are available in DO-214AA (SMB) package instead of DO-214AC (SMA). While electrically compatible at 40V, 1A, the different package requires PCB layout modification. Use these parts only if board redesign is acceptable or if the larger SMB footprint is preferred for thermal management.

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

A: B240A-E3/5AT is rated for 40V, 2A operation compared to 1A for SSL14HR3G. While this part can function in circuits designed for 1A operation, it is oversized for the application. Use B240A-E3/5AT only when increased current capacity is required or when 1A-rated parts are unavailable and the higher current rating is acceptable.

Q: What is the operating temperature difference between SSL14HR3G and B140-13-F?

A: SSL14HR3G operates from -55°C to 125°C junction temperature. B140-13-F extends the upper limit to 150°C. This extended temperature range provides additional thermal margin in high-temperature environments. Verify that your application's thermal requirements align with the selected part's operating range.

Q: Can B140WS-7 replace SSL14HR3G?

A: B140WS-7 meets the 40V, 1A electrical requirements but uses SC-76 (SOD-323) package instead of DO-214AC (SMA). This smaller package requires PCB layout modification. Additionally, B140WS-7 exhibits higher forward voltage (620mV at 1A) and lower operating temperature range (-40°C to 125°C). Use this part only for space-constrained applications where package change is acceptable.

Q: What does AEC-Q101 certification mean for automotive applications?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. Parts carrying this certification have undergone rigorous testing for reliability, temperature cycling, and performance consistency required for automotive use. SSL14HR3G and SSL14H both carry AEC-Q101 certification, making them suitable for automotive applications. Non-certified parts may not meet automotive reliability requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all substitute parts listed in this reference are ROHS3 compliant with Moisture Sensitivity Level (MSL) of 1 (Unlimited). This ensures compatibility with modern manufacturing processes and environmental regulations.

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