S110FA Schottky Diode Equivalent & Substitute Parts

Part Overview

The S110FA is a 100V, 1A Schottky rectifier diode manufactured by onsemi in SOD-123FA surface mount packaging. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. The diode features fast recovery characteristics with a maximum forward voltage of 800 mV at 1A and is qualified to AEC-Q101 automotive standards. Due to its discontinued status, equivalent and substitute parts from active manufacturers are necessary for ongoing production and design requirements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	800 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	50	µA @ 100 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Surface Mount	—
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the S110FA is determined by strict electrical and mechanical parameter matching within the Schottky diode category. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 100 V (exact match required)
Current - Average Rectified (Io): 1 A (exact match required)
Technology: Schottky (exact match required)
Mounting Type: Surface Mount (exact match required)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (exact match required)

Secondary Parameters Allowing Variation:

Voltage - Forward (Vf) (Max) @ If: 800 mV maximum at 1A (substitutes may be equal or lower)
Current - Reverse Leakage @ Vr: 50 µA maximum at 100V (substitutes may be equal or lower)
Operating Temperature - Junction: -55°C to 150°C minimum (substitutes may extend upper limit)
Package / Case: SOD-123 variants (SOD-123FA, SOD-123FL, SOD-123W, DO-219AB) are mechanically compatible with appropriate PCB layout modifications

Substitutes are grouped into two categories:

Direct Equivalents (Parametric Match): Parts meeting all critical and secondary parameters with identical or superior electrical characteristics and active product status.

Similar Equivalents (Functional Match with Variations): Parts meeting critical parameters with minor variations in secondary parameters or package form factor, suitable for applications where mechanical or thermal constraints permit.

Parameter Comparison

Parameter	S110FA (onsemi)	SMD110PL-TP (MCC)	PMEG10020AELRX (Nexperia)	SS10100FL_R1_00001 (Panjit)	SS1FH10-M3/H (Vishay)	SS110LW (TSC)	SS110LWH (TSC)
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	100 V	100 V	100 V	100 V	100 V
Current - Average Rectified (Io)	1 A	1 A	2 A	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	800 mV @ 1 A	850 mV @ 1 A	770 mV @ 2 A	800 mV @ 1 A	800 mV @ 1 A	800 mV @ 1 A	800 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	50 µA @ 100 V	500 µA @ 100 V	300 nA @ 100 V	30 µA @ 100 V	5 µA @ 100 V	10 µA @ 100 V	10 µA @ 100 V
Operating Temperature - Junction	-55 to 150°C	-55 to 125°C	Max 175°C	-55 to 150°C	-55 to 175°C	-55 to 150°C	-55 to 150°C
Package / Case	SOD-123W	SOD-123F	SOD-123W	SOD-123F	DO-219AB	SOD-123W	SOD-123W
Product Status	Not For New Designs	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended for Direct Replacement):

SS110LW and SS110LWH (Taiwan Semiconductor Corporation) are parametric equivalents meeting all critical electrical specifications with active product status. Both parts maintain 100V reverse voltage, 1A average rectified current, 800 mV forward voltage at 1A, and fast recovery characteristics. Operating temperature range of -55°C to 150°C matches the original specification. Both are ROHS3 compliant with MSL 1 rating. Package form factor is SOD-123W, compatible with S110FA PCB layouts. SS110LWH offers higher inventory availability (36,843 pcs) compared to SS110LW (2,563 pcs).

Direct Functional Equivalent (Alternative Package):

SS10100FL_R1_00001 (Panjit International Inc.) provides electrical equivalence with identical 100V, 1A, 800 mV specifications and fast recovery performance. Operating temperature range extends to -55°C to 150°C. Reverse leakage current is superior at 30 µA versus 50 µA. Package form factor is SOD-123FL, requiring PCB layout verification for mechanical compatibility. Product status is active with 4,300 pcs inventory.

Enhanced Performance Alternative (Higher Current Rating):

PMEG10020AELRX (Nexperia USA Inc.) exceeds S110FA specifications with 2A average rectified current while maintaining 100V reverse voltage. Forward voltage is superior at 770 mV at 2A. Reverse leakage current is significantly lower at 300 nA. Operating temperature extends to 175°C maximum. Package is SOD-123W. This part is suitable for applications requiring enhanced thermal margin or higher current capacity. Product status is active with 17,242 pcs inventory.

Alternative with Superior Reverse Leakage (Different Package):

SS1FH10-M3/H (Vishay General Semiconductor - Diodes Division) meets all critical parameters with superior reverse leakage of 5 µA at 100V. Operating temperature extends to -55°C to 175°C. Package form factor is DO-219AB (SMF), requiring PCB layout modification. Product status is active with 25,110 pcs inventory. This part is qualified to eSMP® series standards.

Lower Priority Alternative (Temperature Limitation):

SMD110PL-TP (Micro Commercial Co) meets critical electrical parameters with 100V, 1A, fast recovery characteristics. Forward voltage is slightly higher at 850 mV at 1A. Reverse leakage current is higher at 500 µA. Operating temperature range is limited to -55°C to 125°C, reducing upper thermal margin by 25°C compared to S110FA. Package is SOD-123FL. Product status is active with extensive inventory (3,899,581 pcs). This part is suitable only for applications with maximum junction temperature below 125°C.

Frequently Asked Questions (FAQ)

Q: Can SS110LW or SS110LWH be used as direct replacements for S110FA without PCB modification?

A: Yes. Both parts are parametric equivalents with identical electrical specifications and SOD-123W package compatibility. No PCB layout modification is required. Verify component placement and solder pad dimensions match SOD-123W footprint specifications.

Q: What is the primary reason to select PMEG10020AELRX over SS110LW?

A: PMEG10020AELRX provides higher current capacity (2A versus 1A) and superior reverse leakage performance (300 nA versus 10 µA). Selection depends on application current requirements and thermal constraints. For applications requiring only 1A, SS110LW is the appropriate choice.

Q: Is SMD110PL-TP suitable for automotive applications requiring -55°C to 150°C operation?

A: No. SMD110PL-TP maximum operating temperature is 125°C, which is 25°C below the S110FA specification. This part is unsuitable for applications requiring full -55°C to 150°C temperature range. Use SS110LW, SS110LWH, or SS10100FL_R1_00001 for automotive temperature requirements.

Q: Can SS1FH10-M3/H replace S110FA without design changes?

A: SS1FH10-M3/H provides electrical equivalence but uses DO-219AB package instead of SOD-123W. PCB layout modification is required to accommodate the different package form factor. Verify mechanical compatibility with available PCB space and solder pad design before implementation.

Q: What is the significance of reverse leakage current differences among substitute parts?

A: Reverse leakage current affects power dissipation and circuit performance at high temperatures. Lower reverse leakage (SS1FH10-M3/H at 5 µA, PMEG10020AELRX at 300 nA) reduces standby power consumption and improves circuit efficiency. Higher reverse leakage (SMD110PL-TP at 500 µA) increases power dissipation and may require thermal management consideration.

Q: Are all substitute parts ROHS3 compliant and MSL 1 rated?

A: Yes. All substitute parts listed are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching S110FA compliance status. All parts are suitable for lead-free soldering processes and unrestricted storage conditions.

Q: What inventory considerations apply when selecting substitute parts?

A: SS110LWH offers the highest inventory availability at 36,843 pcs, followed by PMEG10020AELRX at 17,242 pcs and SS1FH10-M3/H at 25,110 pcs. SMD110PL-TP has extensive inventory at 3,899,581 pcs. SS110LW has limited availability at 2,563 pcs. Inventory levels should be verified at time of procurement.

Q: Can multiple substitute parts be used interchangeably within the same production run?

A: Electrical interchangeability is confirmed for SS110LW, SS110LWH, and SS10100FL_R1_00001 within specified parameter tolerances. However, package form factor differences (SOD-123W versus SOD-123FL versus DO-219AB) require separate PCB designs or layout accommodations. Standardization on a single substitute part is recommended for production consistency.

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