SSL22H Schottky Diode 20V 2A Equivalent & Substitute Parts

Part Overview

The SSL22H is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 20V DC reverse voltage and 2A average rectified current in a DO-214AA (SMB) surface mount package. This component is classified as Active product status with AEC-Q101 automotive qualification. Substitute parts are necessary when the SSL22H becomes unavailable from inventory, when alternative packaging formats are required for specific PCB layouts, or when design requirements call for enhanced temperature operating ranges or different electrical characteristics within the same voltage and current class.

Key Parameters

Parameter	Value	Specification
Voltage - DC Reverse (Vr) (Max)	20 V	Maximum reverse voltage rating
Current - Average Rectified (Io)	2 A	Maximum average forward current
Voltage - Forward (Vf) (Max) @ If	410 mV @ 2 A	Forward voltage drop at rated current
Technology	Schottky	Diode type classification
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Recovery time specification
Current - Reverse Leakage @ Vr	400 µA @ 20 V	Leakage current at maximum reverse voltage
Package / Case	DO-214AA, SMB	Surface mount package designation
Operating Temperature - Junction	-55°C ~ 125°C	Temperature operating range
Mounting Type	Surface Mount	PCB assembly method
Grade	Automotive	Application classification
Qualification	AEC-Q101	Automotive electronics qualification standard
RoHS Status	ROHS3 Compliant	Environmental compliance
Moisture Sensitivity Level (MSL)	1 (Unlimited)	Moisture handling classification

Substitute Part Grouping Explanation

Substitution of the SSL22H is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria (Must Match):

Voltage - DC Reverse (Vr) (Max): 20 V
Current - Average Rectified (Io): 2 A
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Surface Mount
Package / Case: DO-214AA, SMB (or compatible SMB variants)

Secondary Compatibility Parameters (Allowable Variation):

Voltage - Forward (Vf) (Max) @ If: Substitute parts rated at 500 mV @ 2 A are acceptable (SSL22H rated at 410 mV @ 2 A)
Current - Reverse Leakage @ Vr: Substitute parts rated at 500 µA @ 20 V are acceptable (SSL22H rated at 400 µA @ 20 V)
Operating Temperature - Junction: Extended ranges (-65°C to 150°C) are acceptable for applications not requiring the full automotive temperature range
Packaging Format: Cut Tape (CT), Digi-Reel®, and Tape & Reel (TR) are interchangeable for component procurement

Substitutes Not Recommended:

SK12-LTP: Current rating 1 A (below 2 A requirement)
SK32B-LTP, SK32B-TP: Current rating 3 A (exceeds 2 A specification; not direct equivalent)
SK42BL-TP: Current rating 4 A (exceeds 2 A specification; not direct equivalent)
B220A-13-F: Package variant DO-214AC, SMA (different package footprint)

Direct Equivalent Substitutes (Matching All Primary Criteria):

B220-13-F (Diodes Incorporated)
B220Q-13-F (Diodes Incorporated)
SS22-E3/52T (Vishay General Semiconductor)
SS22-E3/5BT (Vishay General Semiconductor)

Parameter Comparison

Parameter	SSL22H (Main)	B220-13-F	B220Q-13-F	SS22-E3/52T	SS22-E3/5BT
Manufacturer	Taiwan Semiconductor	Diodes Incorporated	Diodes Incorporated	Vishay General Semiconductor	Vishay General Semiconductor
Voltage - DC Reverse (Vr) (Max)	20 V	20 V	20 V	20 V	20 V
Current - Average Rectified (Io)	2 A	2 A	2 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	410 mV @ 2 A	500 mV @ 2 A	500 mV @ 2 A	500 mV @ 2 A	500 mV @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	400 µA @ 20 V	500 µA @ 20 V	500 µA @ 20 V	400 µA @ 20 V	400 µA @ 20 V
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Operating Temperature - Junction	-55°C ~ 125°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 125°C	-65°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active
Grade	Automotive	Not specified	Automotive	Not specified	Not specified
Qualification	AEC-Q101	Not specified	AEC-Q101	Not specified	Not specified

Engineering Selection Recommendations

Recommended Primary Substitutes (Highest Compatibility):

B220Q-13-F (Diodes Incorporated) - Preferred substitute for automotive applications. Matches SSL22H in voltage, current, and package specifications. Carries AEC-Q101 automotive qualification and Automotive grade designation. Extended operating temperature range (-65°C ~ 150°C) provides additional thermal margin. Available in Tape & Reel packaging matching SSL22H format. Product status is Active.
SS22-E3/52T (Vishay General Semiconductor) - Direct electrical equivalent with matching reverse leakage current specification (400 µA @ 20 V). Identical voltage and current ratings. Active product status with high inventory availability (28,650 pcs). Operating temperature range -65°C ~ 125°C. Available in Cut Tape format.
SS22-E3/5BT (Vishay General Semiconductor) - Functionally equivalent to SS22-E3/52T with identical electrical specifications. Active product status with highest inventory availability (47,700 pcs). Available in Cut Tape & Digi-Reel® packaging format.

Secondary Substitutes (Acceptable with Design Verification):

B220-13-F (Diodes Incorporated) - Meets all primary electrical criteria with 20V/2A ratings and SMB package. Extended operating temperature range (-65°C ~ 150°C). Active product status with substantial inventory (65,310 pcs). Forward voltage specification is 500 mV @ 2 A (higher than SSL22H at 410 mV @ 2 A). Reverse leakage is 500 µA @ 20 V (higher than SSL22H at 400 µA @ 20 V). Suitable for non-automotive applications or where thermal performance margin is not critical.

Not Recommended as Direct Substitutes:

SK12-LTP, SK32B-LTP, SK32B-TP, SK42BL-TP - Current ratings do not match 2 A specification. These parts are rated for 1 A, 3 A, and 4 A respectively and are not direct equivalents.
B220A-13-F - Different package footprint (DO-214AC, SMA) incompatible with DO-214AA, SMB PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can I use B220-13-F as a direct replacement for SSL22H in automotive applications?

A: B220-13-F is electrically compatible with SSL22H for voltage and current specifications. However, it lacks AEC-Q101 qualification and Automotive grade designation. For automotive applications requiring these certifications, use B220Q-13-F instead, which carries both qualifications.

Q: What is the difference between the forward voltage specifications of SSL22H (410 mV) and B220-13-F (500 mV)?

A: Both parts are rated at 2 A forward current. The SSL22H exhibits lower forward voltage drop (410 mV) compared to B220-13-F (500 mV). This difference affects power dissipation in the circuit. SSL22H will generate less heat at rated current. If thermal performance is critical, verify that the substitute part's higher forward voltage drop is acceptable for your application.

Q: Are SS22-E3/52T and SS22-E3/5BT interchangeable?

A: Yes. Both parts are manufactured by Vishay General Semiconductor with identical electrical specifications (20V, 2A, 400 µA reverse leakage). The difference is packaging format: SS22-E3/52T is supplied in Cut Tape (CT), while SS22-E3/5BT is supplied in Cut Tape & Digi-Reel®. Selection depends on procurement and assembly requirements.

Q: Why is SK42BL-TP listed in the SSL22H substitutes but not recommended?

A: SK42BL-TP is rated for 4 A average rectified current, which exceeds the SSL22H specification of 2 A. While it shares the same 20V reverse voltage rating and DO-214AA package, the higher current rating makes it a different component class. Using an oversized part introduces unnecessary cost and may mask circuit design issues.

Q: Can I substitute SSL22H with SK12-LTP?

A: No. SK12-LTP is rated for 1 A average rectified current, which is below the SSL22H specification of 2 A. This part cannot safely carry the required 2 A current and is not a valid substitute.

Q: What does AEC-Q101 qualification mean for diode selection?

A: AEC-Q101 is an automotive electronics qualification standard that certifies components for reliability in automotive environments. Parts carrying this qualification have undergone specific stress testing and quality validation. For automotive applications, selecting AEC-Q101 qualified parts (such as SSL22H or B220Q-13-F) ensures compliance with automotive industry standards.

Q: Are there package compatibility issues between DO-214AA and SMB designations?

A: No. DO-214AA and SMB refer to the same physical package format. Both designations describe a surface mount package with identical footprint and pin configuration. These terms are used interchangeably by different manufacturers.

Q: What is the significance of the -55°C to 125°C operating temperature range on SSL22H compared to -65°C to 150°C on B220-13-F?

A: SSL22H has a narrower operating temperature range. If your application operates within SSL22H's specified range (-55°C to 125°C), both parts are suitable. If your application requires operation below -55°C or above 125°C, substitute parts with extended ranges (such as B220-13-F at -65°C to 150°C) must be used.

Q: Is reverse leakage current difference between SSL22H (400 µA) and B220-13-F (500 µA) significant?

A: Both specifications are measured at 20V reverse voltage. The 100 µA difference represents a 25% increase in leakage current for B220-13-F. For most applications, this difference is negligible. However, in low-power or precision circuits where leakage current is critical, SSL22H or parts with matching 400 µA specification (SS22-E3/52T, SS22-E3/5BT) are preferred.

Q: What does ROHS3 Compliant status mean?

A: ROHS3 Compliant indicates the part meets Restriction of Hazardous Substances Directive 3 requirements, restricting the use of specific hazardous materials in electrical and electronic equipment. All listed substitute parts carry ROHS3 compliance, ensuring environmental and regulatory conformance.

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