S115FA Schottky Diode 150V 1A Equivalent & Substitute Parts

Part Overview

The S115FA is a Schottky rectifier diode manufactured by onsemi, rated for 150V DC reverse voltage and 1A average rectified current in a surface mount SOD-123FA package. This component is classified as "Not For New Designs," indicating it has been superseded in onsemi's product portfolio. Equivalent and substitute parts are necessary for applications requiring continued sourcing, design flexibility, or performance optimization while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	150	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	900 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	50	µA @ 150 V
Capacitance @ Vr, F	55	pF @ 4V, 1MHz
Operating Temperature - Junction	-55°C ~ 150°C	°C
Package / Case	SOD-123W	—
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—
AEC-Q101 Qualification	Yes	—

Substitute Part Grouping Explanation

Substitution eligibility for the S115FA is determined by the following critical parameters:

Mandatory Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 150V
Current - Average Rectified (Io): 1A
Mounting Type: Surface Mount
Fast Recovery Speed: ≤ 500ns, > 200mA (Io)
RoHS3 Compliance

Compatible Variation Criteria:

Forward voltage (Vf) may vary within acceptable circuit design margins
Reverse leakage current may be lower than the main part specification
Operating temperature range may extend beyond the main part range
Package variants within the SOD-123 family (SOD-123W, SOD-123F, SOD-123FA) are mechanically compatible
Technology type (Schottky or SiGe) may differ provided electrical parameters are met

Incompatible Criteria:

Different voltage ratings
Different current ratings
Non-surface mount packages
Slower recovery speeds

Three substitute parts meet these criteria: PMEG150G10ELRX (Nexperia), SS10150FL_R1_00001 (Panjit), and V1FM15-M3/H (Vishay).

Parameter Comparison

Parameter	S115FA (onsemi)	PMEG150G10ELRX (Nexperia)	SS10150FL_R1_00001 (Panjit)	V1FM15-M3/H (Vishay)
Voltage - DC Reverse (Vr) (Max)	150 V	150 V	150 V	150 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	900 mV @ 1 A	850 mV @ 1 A	850 mV @ 1 A	1.22 V @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	50 µA @ 150 V	30 nA @ 150 V	30 µA @ 150 V	50 µA @ 150 V
Capacitance @ Vr, F	55 pF @ 4V, 1MHz	34 pF @ 1V, 1MHz	Not Specified	60 pF @ 4V, 1MHz
Operating Temperature - Junction	-55°C ~ 150°C	175°C (Max)	-55°C ~ 150°C	-40°C ~ 175°C
Package / Case	SOD-123W	SOD-123W	SOD-123F	DO-219AB
Technology	Schottky	SiGe (Silicon Germanium)	Schottky	Schottky
Product Status	Not For New Designs	Not For New Designs	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

PMEG150G10ELRX (Nexperia USA Inc.)

This SiGe technology substitute provides superior electrical performance with lower forward voltage (850 mV vs. 900 mV) and significantly reduced reverse leakage current (30 nA vs. 50 µA). The SOD-123W package is mechanically identical to the S115FA. However, this part carries "Not For New Designs" status, limiting its suitability for long-term production applications. ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) are maintained.

SS10150FL_R1_00001 (Panjit International Inc.)

This Schottky technology substitute maintains identical voltage and current ratings with matching forward voltage performance (850 mV vs. 900 mV). The part holds "Active" product status, supporting continued sourcing and new design implementation. The SOD-123F package is mechanically compatible within the SOD-123 family. ROHS3 compliance is confirmed. This part is recommended for applications requiring active product status and long-term availability.

V1FM15-M3/H (Vishay General Semiconductor - Diodes Division)

This Schottky technology substitute is rated for identical voltage and current specifications. The part holds "Active" product status and supports extended operating temperature range (-40°C to 175°C). The DO-219AB package differs from the SOD-123 family, requiring PCB layout and footprint verification before implementation. Forward voltage is higher (1.22 V vs. 900 mV), which may impact circuit efficiency and thermal performance. ROHS3 compliance is confirmed. This part is suitable for applications where package footprint compatibility is not a constraint and higher forward voltage is acceptable.

Frequently Asked Questions (FAQ)

Q: Can I use PMEG150G10ELRX as a direct replacement for S115FA?

A: PMEG150G10ELRX meets all critical electrical parameters (150V, 1A, fast recovery) and uses the identical SOD-123W package. However, the "Not For New Designs" status of both parts limits this substitution to legacy or maintenance applications. The lower forward voltage (850 mV) and reverse leakage current (30 nA) represent performance improvements but require circuit validation to confirm compatibility.

Q: Which substitute part is best for new product designs?

A: SS10150FL_R1_00001 (Panjit) is the recommended choice for new designs. It carries "Active" product status, ensuring long-term availability and manufacturer support. The Schottky technology, SOD-123F package compatibility, and electrical parameters (150V, 1A, 850 mV forward voltage) provide reliable performance with established supply chain continuity.

Q: Is the V1FM15-M3/H package compatible with S115FA PCB layouts?

A: No. The V1FM15-M3/H uses a DO-219AB (SMF) package, which differs from the SOD-123W package of the S115FA. PCB footprint, lead spacing, and mounting area are not compatible. This part requires new PCB design or rework of existing layouts. Verify footprint compatibility before implementation.

Q: What is the impact of forward voltage differences between substitutes?

A: Forward voltage differences directly affect circuit efficiency and thermal dissipation. The S115FA specifies 900 mV at 1A. PMEG150G10ELRX and SS10150FL_R1_00001 both provide 850 mV (50 mV lower), reducing power loss. V1FM15-M3/H specifies 1.22 V (320 mV higher), increasing power dissipation. Circuit designs with tight thermal budgets or efficiency requirements must account for these variations through simulation or testing.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All three substitute parts (PMEG150G10ELRX, SS10150FL_R1_00001, and V1FM15-M3/H) are ROHS3 compliant, matching the S115FA specification. All parts also maintain unlimited moisture sensitivity level (MSL 1) and REACH unaffected status.

Q: What is the difference between Schottky and SiGe technology in these diodes?

A: Schottky diodes (S115FA, SS10150FL_R1_00001, V1FM15-M3/H) use a metal-semiconductor junction, providing fast switching and moderate forward voltage. SiGe diodes (PMEG150G10ELRX) use silicon-germanium technology, offering lower forward voltage and reverse leakage current at the cost of higher complexity. Both technologies meet the 150V, 1A, fast recovery specifications. Technology selection depends on circuit efficiency and thermal management requirements.

Q: Can I use these substitutes in automotive applications?

A: The S115FA carries AEC-Q101 automotive qualification. Among substitutes, only SS10150FL_R1_00001 and V1FM15-M3/H have "Active" status suitable for automotive new designs. PMEG150G10ELRX carries "Not For New Designs" status. Verify automotive qualification requirements with the specific application and consult manufacturer datasheets for AEC-Q101 compliance of substitute parts before implementation in automotive circuits.

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