SS14FP Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS14FP is a 40V, 1A Schottky rectifier diode manufactured by onsemi in SOD-123HE surface mount packaging. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. The part carries automotive-grade qualification (AEC-Q101) and is RoHS3 compliant. Due to its discontinued design status, equivalent and substitute parts from active manufacturers are necessary for ongoing production requirements and design continuity.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 1 A	mV
Reverse Recovery Time (trr)	6	ns
Current - Reverse Leakage @ Vr	400	µA @ 40 V
Capacitance @ Vr, F	54	pF @ 4V, 1MHz
Package / Case	SOD-123H	-
Operating Temperature - Junction	-55 to 150	°C
Grade	Automotive	-
Qualification	AEC-Q101	-

Substitute Part Grouping Explanation

Substitution of the SS14FP is determined by strict equivalence across the following critical parameters:

Parametric Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 1 A
Package / Case: SOD-123H
Technology: Schottky
Operating Temperature Range: -55°C to 150°C
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Functional Compatibility Criteria:

RoHS3 Compliance
Moisture Sensitivity Level (MSL): 1 (Unlimited)
Surface Mount Mounting Type

Parts are grouped into two categories:

Direct Parametric Equivalents (Same Package, Same Current Rating): Parts maintaining identical voltage, current, and package specifications with active product status.

Functional Substitutes (Enhanced Current Rating): Parts with superior current handling capability in alternative surface mount packages, suitable for applications where package footprint change is acceptable.

Parameter Comparison

Parameter	SS14FP (onsemi)	SS1040HE_R1_00001 (Panjit)	SS14LS (TSC)	SS14LSHRVG (TSC)	SS1P4LHM3/84A (Vishay)
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	40 V	40 V	40 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	1.5 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 1 A	550 mV @ 1 A	550 mV @ 1 A	550 mV @ 1 A	480 mV @ 1 A
Current - Reverse Leakage @ Vr	400 µA @ 40 V	30 µA @ 40 V	400 µA @ 40 V	400 µA @ 40 V	150 µA @ 40 V
Capacitance @ Vr, F	54 pF @ 4V, 1MHz	155 pF @ 0V, 1MHz	80 pF @ 4V, 1MHz	80 pF @ 4V, 1MHz	130 pF @ 4V, 1MHz
Package / Case	SOD-123H	SOD-123H	SOD-123H	SOD-123H	DO-220AA
Product Status	Not For New Designs	Active	Active	Active	Active
Grade	Automotive	-	-	Automotive	Automotive
Qualification	AEC-Q101	-	-	AEC-Q101	AEC-Q101
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Manufacturer	onsemi	Panjit International Inc.	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Vishay General Semiconductor - Diodes Division

Engineering Selection Recommendations

For Automotive Applications with AEC-Q101 Requirement:

SS14LSHRVG (Taiwan Semiconductor Corporation) is the primary direct equivalent. This part maintains identical electrical specifications, SOD-123H packaging, and carries automotive-grade qualification with AEC-Q101 certification. Product status is Active, ensuring long-term availability. This selection is appropriate for applications requiring strict compliance with automotive qualification standards.

For General Industrial Applications:

SS14LS (Taiwan Semiconductor Corporation) provides direct parametric equivalence in SOD-123H packaging with Active product status. This part is suitable for non-automotive applications where AEC-Q101 certification is not mandated. Electrical performance is identical to the SS14FP.

For Enhanced Current Capability with Package Change Acceptance:

SS1P4LHM3/84A (Vishay General Semiconductor - Diodes Division) offers 1.5A current rating with improved forward voltage characteristics (480 mV @ 1 A versus 550 mV @ 1 A). This part requires PCB layout modification due to DO-220AA (SMP) packaging versus SOD-123H. Selection is appropriate when thermal margin improvement or higher current headroom is required and package footprint change is feasible.

For Parametric Equivalence with Reduced Leakage:

SS1040HE_R1_00001 (Panjit International Inc.) maintains identical voltage, current, and package specifications with significantly reduced reverse leakage current (30 µA @ 40 V versus 400 µA @ 40 V). This part lacks automotive qualification; selection is appropriate for non-automotive applications where leakage current reduction provides circuit performance benefit.

Frequently Asked Questions (FAQ)

Q: Can SS14LS directly replace SS14FP without PCB modification?

A: Yes. SS14LS maintains identical SOD-123H packaging, voltage rating (40V), current rating (1A), and operating temperature range (-55°C to 150°C). No PCB layout changes are required.

Q: What is the difference between SS14LSHRVG and SS14LS?

A: Both parts are manufactured by Taiwan Semiconductor Corporation with identical electrical specifications and SOD-123H packaging. SS14LSHRVG carries automotive-grade qualification (AEC-Q101), while SS14LS does not. Selection depends on application requirements for automotive certification.

Q: Why does SS1P4LHM3/84A have a different package designation?

A: SS1P4LHM3/84A uses DO-220AA (SMP) packaging instead of SOD-123H. This larger package accommodates the higher 1.5A current rating and provides improved thermal characteristics. PCB footprint and layout modifications are necessary for this substitution.

Q: Is SS1040HE_R1_00001 suitable for automotive applications?

A: SS1040HE_R1_00001 lacks automotive-grade qualification and AEC-Q101 certification. This part is not suitable for applications requiring automotive compliance. For automotive requirements, use SS14LSHRVG.

Q: What is the significance of the reverse leakage current difference between SS14FP and SS1040HE_R1_00001?

A: SS1040HE_R1_00001 exhibits 30 µA reverse leakage at 40V compared to 400 µA for SS14FP. Lower leakage current reduces power dissipation and improves circuit efficiency in applications sensitive to standby current or high-impedance circuits.

Q: Can I use SS1P4LHM3/84A in a design originally specified for SS14FP?

A: Electrical substitution is possible due to matching voltage and current ratings at the specified operating point. However, the DO-220AA package is physically larger than SOD-123H, requiring PCB layout redesign. Forward voltage is improved (480 mV versus 550 mV @ 1A), which may reduce thermal dissipation. Verify PCB space availability and thermal requirements before implementation.

Q: What does "Not For New Designs" status mean for SS14FP?

A: This designation indicates the part has reached end-of-life and the manufacturer is not recommending its use in new product designs. Existing inventory may be available, but long-term supply cannot be guaranteed. Active equivalent parts (SS14LS, SS14LSHRVG, SS1040HE_R1_00001) should be used for new designs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance, matching the environmental compliance status of the SS14FP.

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