SSL12 R3G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SSL12 R3G is a 20V, 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 production and repair applications. The part maintains ROHS3 compliance and operates across a junction temperature range of -55°C to 125°C. Equivalent parts with identical electrical specifications and substitute parts with compatible parameters are available from multiple manufacturers including Diodes Incorporated and Vishay General Semiconductor.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	20 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 @ 20 V
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 125°C
Technology	Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SSL12 R3G is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 20 V (exact match required)
Current - Average Rectified (Io): 1 A (exact match required)
Technology: Schottky (exact match required)
Package / Case: DO-214AC, SMA (exact match required)
Mounting Type: Surface Mount (exact match required)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (exact match required)

Allowable Parameter Variations:

Voltage - Forward (Vf) (Max) @ If: 390 mV to 520 mV @ 1 A (within acceptable forward voltage range)
Current - Reverse Leakage @ Vr: 200 µA to 500 µA @ 20 V (within acceptable leakage range)
Operating Temperature - Junction: -55°C to -65°C minimum; 125°C to 150°C maximum (extended ranges acceptable)
Capacitance @ Vr, F: Not specified in main part; presence in substitute parts does not disqualify substitution

Packaging Variations:

Tape & Reel (TR) packaging is compatible with Cut Tape (CT) and Digi-Reel® applications
DO-214AA (SMB) package represents a different form factor and is listed as similar but not direct equivalent

Parts are grouped as Parametric Equivalents when all electrical specifications and package requirements match exactly. Parts are grouped as Similar when electrical specifications fall within allowable ranges but may include minor variations in forward voltage, leakage current, or temperature range.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Reverse Leakage @ Vr	Package	Temp Range (Tj)	Product Status
SSL12 R3G	Taiwan Semiconductor Corporation	20 V	1 A	390 mV @ 1 A	200 µA @ 20 V	DO-214AC, SMA	-55°C ~ 125°C	Discontinued
SSL12	Taiwan Semiconductor Corporation	20 V	1 A	390 mV @ 1 A	200 µA @ 20 V	DO-214AC, SMA	-55°C ~ 125°C	Active
SSL12H	Taiwan Semiconductor Corporation	20 V	1 A	390 mV @ 1 A	200 µA @ 20 V	DO-214AC, SMA	-55°C ~ 125°C	Active
B120-13-F	Diodes Incorporated	20 V	1 A	500 mV @ 1 A	500 µA @ 20 V	DO-214AC, SMA	-65°C ~ 150°C	Active
B120-E3/5AT	Vishay General Semiconductor - Diodes Division	20 V	1 A	520 mV @ 1 A	200 µA @ 20 V	DO-214AC, SMA	-65°C ~ 125°C	Active
B120-E3/61T	Vishay General Semiconductor - Diodes Division	20 V	1 A	520 mV @ 1 A	200 µA @ 20 V	DO-214AC, SMA	-65°C ~ 125°C	Active
B120-M3/5AT	Vishay General Semiconductor - Diodes Division	20 V	1 A	520 mV @ 1 A	200 µA @ 20 V	DO-214AC, SMA	-65°C ~ 150°C	Active
B120-M3/61T	Vishay General Semiconductor - Diodes Division	20 V	1 A	520 mV @ 1 A	200 µA @ 20 V	DO-214AC, SMA	-65°C ~ 150°C	Active
B120B-13-F	Diodes Incorporated	20 V	1 A	500 mV @ 1 A	500 µA @ 20 V	DO-214AA, SMB	-65°C ~ 150°C	Active
B120Q-13-F	Diodes Incorporated	20 V	1 A	500 mV @ 1 A	500 µA @ 20 V	DO-214AC, SMA	-65°C ~ 150°C	Active
B220AQ-13-F	Diodes Incorporated	20 V	2 A	500 mV @ 2 A	500 µA @ 20 V	DO-214AC, SMA	-65°C ~ 150°C	Active

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacements):

SSL12 and SSL12H from Taiwan Semiconductor Corporation are parametric equivalents to the SSL12 R3G. Both parts maintain identical electrical specifications (20V, 1A, 390 mV forward voltage, 200 µA reverse leakage) and package configuration. SSL12 is available in standard packaging with 7600 pieces in stock. SSL12H includes AEC-Q101 automotive qualification and is suitable for applications requiring automotive-grade components, with 839 pieces in stock. Both parts are active products.

Similar Substitutes (Compatible Alternatives):

B120-13-F (Diodes Incorporated) and B120Q-13-F (Diodes Incorporated) are active products with identical voltage and current ratings in DO-214AC SMA package. B120-13-F exhibits 500 mV forward voltage and 500 µA reverse leakage with extended temperature range (-65°C to 150°C). B120Q-13-F includes AEC-Q101 automotive qualification with identical electrical characteristics and extended temperature range. Both parts have high inventory availability (109,100 and 25,400 pieces respectively).

B120-E3/5AT, B120-E3/61T, B120-M3/5AT, and B120-M3/61T from Vishay General Semiconductor are active products with 20V, 1A ratings and 520 mV forward voltage. These parts maintain 200 µA reverse leakage matching the original specification. B120-M3/5AT and B120-M3/61T offer extended temperature range to 150°C. Inventory availability ranges from 799 to 25,300 pieces.

B120B-13-F (Diodes Incorporated) is a similar substitute with different package form factor (DO-214AA SMB instead of DO-214AC SMA). This part is suitable only when SMB package footprint is acceptable in the application.

B220AQ-13-F (Diodes Incorporated) is a higher current variant (2A instead of 1A) with identical voltage rating and AEC-Q101 automotive qualification. This part is suitable for applications requiring higher current capacity within the same voltage class.

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. Selection should be based on product availability, required temperature range, automotive qualification requirements, and packaging constraints specific to the application.

Frequently Asked Questions (FAQ)

Q: Can SSL12 R3G be directly replaced with SSL12 or SSL12H?

A: Yes. SSL12 and SSL12H are parametric equivalents with identical electrical specifications (20V, 1A, 390 mV forward voltage, 200 µA reverse leakage) and DO-214AC SMA package. SSL12H includes AEC-Q101 automotive qualification if required by the application.

Q: What is the difference between parametric equivalents and similar substitutes?

A: Parametric equivalents match all electrical specifications and package requirements exactly. Similar substitutes meet the core voltage and current requirements but may have variations in forward voltage (up to 520 mV), reverse leakage (up to 500 µA), or temperature range. Both categories are functionally compatible within the specified parameter ranges.

Q: Can B120-13-F replace SSL12 R3G in all applications?

A: B120-13-F is compatible for applications where forward voltage up to 500 mV and reverse leakage up to 500 µA are acceptable. The part offers extended temperature range (-65°C to 150°C) compared to the original (-55°C to 125°C). Verify that the higher forward voltage does not impact circuit performance in power dissipation or voltage drop calculations.

Q: What is the significance of AEC-Q101 qualification in B120Q-13-F and SSL12H?

A: AEC-Q101 qualification indicates the part meets automotive industry reliability standards. These parts are suitable for automotive applications requiring certified components. Non-automotive applications do not require this qualification.

Q: Why is B120B-13-F listed as a similar substitute if it uses SMB package instead of SMA?

A: B120B-13-F has identical electrical specifications but different physical package (DO-214AA SMB vs. DO-214AC SMA). This part is a substitute only if the application circuit board has SMB footprint capability. Direct PCB substitution is not possible without layout modification.

Q: Is B220AQ-13-F suitable as a substitute for SSL12 R3G?

A: B220AQ-13-F is rated for 2A average rectified current compared to 1A for SSL12 R3G. This higher current rating makes it suitable for applications requiring increased current capacity within the same 20V voltage class. The part is electrically compatible but represents an upgrade in current handling capability.

Q: What packaging options are available for SSL12 R3G substitutes?

A: Substitute parts are available in Tape & Reel (TR), Cut Tape (CT), and Digi-Reel® packaging. These packaging formats are compatible for automated assembly and manual component handling. Selection depends on procurement and assembly process requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental and regulatory status of the original SSL12 R3G.

Q: What is the inventory status of available substitutes?

A: SSL12 (7600 pieces), B120-13-F (109,100 pieces), B120Q-13-F (25,400 pieces), and B120-E3/61T (25,300 pieces) have the highest inventory availability. SSL12H, B120-M3/5AT, and B120-M3/61T have lower availability (799-871 pieces). Inventory status should be confirmed with suppliers for production planning.

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