SSL12HR3G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SSL12HR3G is a 20V, 1A Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation in DO-214AC (SMA) surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement. The SSL12HR3G is qualified to AEC-Q101 automotive standards and operates across a junction temperature range of -55°C to 125°C. Equivalent parts maintain identical electrical specifications, while substitute parts offer compatible performance within defined parameter tolerances for Schottky diode rectification applications.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	20	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	390 mV @ 1 A	mV
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 to 125	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SSL12HR3G is determined by the following critical parameters: reverse voltage rating (20V), average rectified current (1A), Schottky technology, DO-214AC/SMA package compatibility, surface mount mounting type, and fast recovery speed characteristic (≤500ns, >200mA). Parts are grouped into two categories:

Parametric Equivalents maintain all electrical specifications and automotive qualification (AEC-Q101). These parts are direct replacements with identical performance characteristics.

Similar Substitutes maintain the core electrical specifications (20V, 1A, Schottky, fast recovery, DO-214AC/SMA package) but may differ in forward voltage drop, reverse leakage current, operating temperature range, or packaging format (Tape & Reel versus Cut Tape). These parts are functionally compatible for rectification applications where the specified parameter variations are acceptable.

Parts with different current ratings (2A) or package types (SMB) are included as extended substitutes where mechanical or thermal considerations permit package variation.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Ir @ Vr [µA]	Package	Temp Range [°C]	AEC-Q101	Product Status
SSL12HR3G	Taiwan Semiconductor Corporation	20	1	390 @ 1A	200 @ 20V	DO-214AC, SMA	-55 to 125	Yes	Discontinued
SSL12	Taiwan Semiconductor Corporation	20	1	390 @ 1A	200 @ 20V	DO-214AC, SMA	-55 to 125	No	Active
SSL12H	Taiwan Semiconductor Corporation	20	1	390 @ 1A	200 @ 20V	DO-214AC, SMA	-55 to 125	Yes	Active
B120-13-F	Diodes Incorporated	20	1	500 @ 1A	500 @ 20V	DO-214AC, SMA	-65 to 150	No	Active
B120-E3/5AT	Vishay General Semiconductor - Diodes Division	20	1	520 @ 1A	200 @ 20V	DO-214AC, SMA	-65 to 125	No	Active
B120-E3/61T	Vishay General Semiconductor - Diodes Division	20	1	520 @ 1A	200 @ 20V	DO-214AC, SMA	-65 to 125	No	Active
B120-M3/5AT	Vishay General Semiconductor - Diodes Division	20	1	520 @ 1A	200 @ 20V	DO-214AC, SMA	-65 to 150	No	Active
B120-M3/61T	Vishay General Semiconductor - Diodes Division	20	1	520 @ 1A	200 @ 20V	DO-214AC, SMA	-65 to 150	No	Active
B120B-13-F	Diodes Incorporated	20	1	500 @ 1A	500 @ 20V	DO-214AA, SMB	-65 to 150	No	Active
B120Q-13-F	Diodes Incorporated	20	1	500 @ 1A	500 @ 20V	DO-214AC, SMA	-65 to 150	Yes	Active
B220AQ-13-F	Diodes Incorporated	20	2	500 @ 2A	500 @ 20V	DO-214AC, SMA	-65 to 150	Yes	Active

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent): SSL12H is the recommended direct replacement for SSL12HR3G. Both parts maintain identical electrical specifications (20V, 1A, 390mV forward voltage, 200µA reverse leakage), automotive AEC-Q101 qualification, and operating temperature range (-55°C to 125°C). SSL12H is currently active in production with established supply availability.

Primary Substitutes (Identical Voltage and Current Rating): B120Q-13-F (Diodes Incorporated) is a functionally compatible substitute with AEC-Q101 automotive qualification. This part maintains 20V reverse voltage and 1A current rating in DO-214AC/SMA package. Forward voltage is specified at 500mV (versus 390mV for SSL12HR3G) and reverse leakage is 500µA (versus 200µA). Operating temperature range extends to -65°C to 150°C. This part is active in production with high inventory availability.

Secondary Substitutes (Parameter Variations Acceptable): B120-13-F, B120-E3/5AT, B120-E3/61T, B120-M3/5AT, and B120-M3/61T maintain 20V reverse voltage and 1A current rating. These parts exhibit forward voltage specifications of 500mV to 520mV and reverse leakage of 200µA to 500µA. Operating temperature ranges extend to -65°C to 150°C. These parts lack AEC-Q101 qualification but are active in production.

Extended Substitute (Higher Current Rating): B220AQ-13-F is a 2A rated Schottky diode with 20V reverse voltage, AEC-Q101 qualification, and -65°C to 150°C operating range. This part is suitable for applications where higher current capacity is required or where thermal margin is beneficial.

Package Variant (SMB Format): B120B-13-F is a 1A, 20V Schottky diode in DO-214AA/SMB package format. This part is suitable only where mechanical board layout permits SMB package substitution for the original SMA package.

Frequently Asked Questions (FAQ)

Q: Can SSL12 (non-HR variant) be used as a direct replacement for SSL12HR3G? A: SSL12 maintains identical electrical specifications and Schottky technology. However, SSL12 lacks automotive AEC-Q101 qualification present in SSL12HR3G. Use SSL12 only in non-automotive applications or where automotive qualification is not required.

Q: What is the significance of the forward voltage difference between SSL12HR3G (390mV) and B120-13-F (500mV)? A: Forward voltage drop affects power dissipation and circuit efficiency. The 110mV difference results in higher power loss in B120-13-F. In low-current applications, this difference is typically acceptable. In high-efficiency or thermally constrained designs, verify that the increased forward voltage drop does not exceed thermal or efficiency budgets.

Q: Are Vishay B120-E3 and B120-M3 series parts interchangeable? A: Both series maintain identical electrical specifications (20V, 1A, 520mV forward voltage, 200µA reverse leakage). The primary difference is operating temperature range: B120-E3 operates -65°C to 125°C, while B120-M3 operates -65°C to 150°C. Select based on application temperature requirements.

Q: Can B120B-13-F (SMB package) replace SSL12HR3G (SMA package)? A: B120B-13-F maintains identical electrical specifications but uses DO-214AA/SMB package instead of DO-214AC/SMA. Mechanical board layout and footprint compatibility must be verified before substitution. SMB packages are physically larger than SMA packages.

Q: Is B220AQ-13-F (2A rating) suitable for SSL12HR3G (1A rating) applications? A: B220AQ-13-F is rated for 2A average rectified current and maintains 20V reverse voltage. This part is suitable for SSL12HR3G applications where the circuit design permits higher current capacity. The 2A rating provides additional thermal margin and current headroom. Verify that forward voltage specification (500mV @ 2A) is acceptable for the application.

Q: What is the impact of reverse leakage current differences on circuit performance? A: SSL12HR3G specifies 200µA reverse leakage at 20V, while Diodes Incorporated parts (B120-13-F, B120Q-13-F, B220AQ-13-F) specify 500µA. Higher reverse leakage increases standby current and power dissipation. In precision analog circuits or low-power applications, verify that the increased leakage current is acceptable for circuit performance.

Q: Are all listed substitutes RoHS3 compliant? A: All parts listed maintain ROHS3 compliance status. All parts are REACH unaffected and carry EAR99 export classification.

Q: What packaging formats are available for SSL12HR3G substitutes? A: Substitutes are available in Tape & Reel (TR) and Cut Tape (CT) packaging formats. SSL12, SSL12H, and most Vishay parts are supplied in Tape & Reel format. B120-13-F and B120-E3/61T are available in Cut Tape format. Select packaging based on procurement and assembly requirements.

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