SS115H Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS115H is a 150V, 1A Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation in DO-214AC (SMA) surface mount package. This component is classified as Active product status and carries AEC-Q101 automotive qualification. The SS115H is designed for fast recovery applications with reverse recovery time ≤500ns at currents >200mA, making it suitable for high-frequency rectification circuits.

Equivalent and substitute parts are identified based on matching or exceeding the electrical performance parameters while maintaining compatibility with the DO-214AC surface mount package. Alternative sources and higher current-rated variants are available to support design flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	150	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) Maximum @ If	500 mV @ 1 A	mV
Speed - Fast Recovery	≤500ns, >200mA (Io)	ns
Current - Reverse Leakage @ Vr	100	µA @ 150 V
Technology	Schottky	—
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 125	°C
RoHS Status	ROHS3 Compliant	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitute parts for the SS115H are classified into three categories based on electrical and mechanical compatibility:

Category 1: Parametric Equivalents (Identical Specifications) Parts matching all critical parameters: 150V reverse voltage, 1A average rectified current, DO-214AC package, fast recovery Schottky technology, and surface mount configuration. These parts are direct functional replacements with no derating required.

Category 2: Similar Specifications (Same Voltage & Package, Variant Parameters) Parts sharing 150V reverse voltage rating and DO-214AC package but with variations in forward voltage drop, reverse leakage current, or capacitance characteristics. These parts are suitable for applications where the specific parameter variance does not impact circuit performance.

Category 3: Higher Current Ratings (Upgraded Performance) Parts rated for 2A, 3A, or 5A average rectified current while maintaining 150V reverse voltage and DO-214AC package. These parts provide thermal margin and are applicable in designs requiring higher current capacity than the 1A specification.

Key Parameters Determining Substitution:

Voltage - DC Reverse (Vr) Maximum: 150V (required match)
Current - Average Rectified (Io): 1A minimum (equal or higher acceptable)
Package / Case: DO-214AC, SMA (required match)
Technology: Schottky (required match)
Mounting Type: Surface Mount (required match)
Speed: Fast Recovery ≤500ns, >200mA (required match)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Package	Tj Operating Range [°C]	Grade
SS115H	Taiwan Semiconductor Corporation	150	1	500 @ 1A	100 @ 150V	DO-214AC, SMA	-55 to 125	Automotive
SS115	Taiwan Semiconductor Corporation	150	1	500 @ 1A	100 @ 150V	DO-214AC, SMA	-55 to 125	—
CDBA1150-HF	Comchip Technology	150	1	870 @ 1A	500 @ 150V	DO-214AC, SMA	-50 to 175	—
CDBA1200-HF	Comchip Technology	150	1	900 @ 1A	500 @ 200V	DO-214AC, SMA	-50 to 175	—
CDBA2150-HF	Comchip Technology	150	2	870 @ 2A	500 @ 150V	DO-214AC, SMA	-55 to 150	—
CDBA3150-HF	Comchip Technology	150	3	870 @ 2A	500 @ 150V	DO-214AC, SMA	-50 to 175	—
CDBA5150-HF	Comchip Technology	150	5	870 @ 5A	500 @ 150V	DO-214AC, SMA	-50 to 175	—
SS1150-LTP	Micro Commercial Co	150	1	900 @ 1A	50 @ 150V	DO-214AC, SMA	-50 to 150	—
SS2150-LTP	Micro Commercial Co	150	2	900 @ 2A	500 @ 150V	DO-214AC, SMA	-55 to 125	—
STPS1150A	STMicroelectronics	150	1	820 @ 1A	1 @ 150V	DO-214AC, SMA	—	—
STPS1150AY	STMicroelectronics	150	1	820 @ 1A	1 @ 150V	DO-214AC, SMA	—	Automotive

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent): The SS115 from Taiwan Semiconductor Corporation is a parametric equivalent with identical electrical specifications and package configuration. This part carries Active product status and is suitable for direct substitution without circuit modification.

Automotive-Grade Alternatives: The STPS1150AY from STMicroelectronics is qualified for automotive applications with AEC-Q101 compliance equivalent to the SS115H. This part exhibits superior reverse leakage characteristics (1 µA @ 150V versus 100 µA @ 150V) and forward voltage performance (820 mV @ 1A versus 500 mV @ 1A), making it suitable for automotive designs requiring enhanced reliability.

Commercial-Grade Alternatives (1A Rating): The CDBA1150-HF and SS1150-LTP are commercial-grade 1A Schottky diodes in DO-214AC package with 150V rating. These parts are suitable for non-automotive applications where the higher forward voltage drop and reverse leakage characteristics are acceptable. Both parts carry Active product status.

Higher Current Capacity Options: The CDBA2150-HF, CDBA3150-HF, and CDBA5150-HF provide 2A, 3A, and 5A ratings respectively while maintaining 150V reverse voltage and DO-214AC package. These parts are applicable in designs requiring thermal margin or higher current capacity than the 1A specification. The SS2150-LTP provides a 2A alternative from Micro Commercial Co.

Compliance Verification: All listed substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification consistent with the SS115H. Moisture sensitivity level remains MSL 1 (Unlimited) across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can the SS115H be replaced with a higher current-rated diode such as the CDBA2150-HF or CDBA5150-HF?

A: Yes. Higher current-rated Schottky diodes with matching 150V reverse voltage and DO-214AC package are suitable replacements. The circuit will operate within the lower current envelope of the 1A design specification. Higher current ratings provide thermal margin and reduce junction temperature stress.

Q: What is the difference between the SS115H and the STPS1150AY?

A: Both parts are 150V, 1A Schottky diodes in DO-214AC package with automotive qualification. The STPS1150AY exhibits lower reverse leakage current (1 µA versus 100 µA @ 150V) and lower forward voltage drop (820 mV versus 500 mV @ 1A). The STPS1150AY is suitable for automotive applications requiring enhanced leakage performance.

Q: Are the Comchip Technology CDBA series parts direct replacements for the SS115H?

A: The CDBA1150-HF and CDBA1200-HF are functionally compatible 1A alternatives with 150V rating and DO-214AC package. However, these parts exhibit higher forward voltage drop (870-900 mV @ 1A versus 500 mV @ 1A) and higher reverse leakage current (500 µA versus 100 µA @ 150V). Verify that circuit design tolerances accommodate these parameter variations.

Q: What is the significance of the DO-214AC package designation?

A: DO-214AC is the industry standard surface mount package for small-signal Schottky diodes, commonly referred to as SMA. All listed substitute parts use this identical package, ensuring mechanical and electrical compatibility with existing PCB layouts and soldering processes.

Q: Can the SS115H be substituted with the SS1150-LTP from Micro Commercial Co?

A: Yes. The SS1150-LTP is a 150V, 1A Schottky diode in DO-214AC package with Active product status. This part exhibits lower reverse leakage current (50 µA versus 100 µA @ 150V) but higher forward voltage drop (900 mV versus 500 mV @ 1A). Verify that the higher forward voltage drop does not impact circuit performance.

Q: What compliance certifications apply to all substitute parts?

A: All listed substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification. Moisture sensitivity level is MSL 1 (Unlimited) for all parts. Automotive-grade parts (SS115H and STPS1150AY) carry AEC-Q101 qualification.

Q: Is the SS115 (non-H variant) from Taiwan Semiconductor Corporation equivalent to the SS115H?

A: Yes. The SS115 is a parametric equivalent with identical electrical specifications, package configuration, and product status. The primary difference is the absence of automotive grade designation on the SS115 variant. For non-automotive applications, the SS115 is a suitable direct replacement.

Q: How do reverse leakage current variations affect circuit design?

A: Reverse leakage current affects standby power consumption and circuit biasing. The SS115H specifies 100 µA @ 150V, while alternatives range from 1 µA (STPS1150AY) to 500 µA (Comchip parts). Lower leakage reduces standby power; higher leakage may require circuit compensation in sensitive applications.

Q: What is the impact of forward voltage drop variations on circuit performance?

A: Forward voltage drop affects power dissipation and voltage regulation. The SS115H specifies 500 mV @ 1A, while alternatives range from 820 mV (STPS1150A/AY) to 900 mV (CDBA1200-HF, SS1150-LTP). Higher forward voltage increases power loss and heat generation. Verify that thermal design accommodates the selected part's forward voltage characteristic.

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