SS115HR3G Equivalent & Substitute Parts

Part Overview

The SS115HR3G is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 150 V DC reverse voltage and 1 A average rectified current in a DO-214AC (SMA) surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs. The device features fast recovery characteristics with a maximum forward voltage of 500 mV at 1 A and is qualified to AEC-Q101 automotive standards.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the SS115HR3G is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 150 V
Current - Average Rectified (Io): 1 A
Package / Case: DO-214AC, SMA
Technology: Schottky
Mounting Type: Surface Mount

Parametric Equivalent Classification: Parts designated as parametric equivalents maintain identical electrical ratings and package specifications. The SS115 (base part number variant) and SS115H meet all primary equivalence criteria with active product status.

Similar Part Classification: Parts classified as similar maintain the same voltage and current ratings with the same package but may exhibit variations in forward voltage characteristics, reverse leakage current, capacitance, or operating temperature ranges. These variations are documented in the parameter comparison table and must be evaluated against specific application requirements.

Current Rating Variants: Parts with different current ratings (CDBA2150-HF at 2 A, CDBA3150-HF at 3 A, CDBA5150-HF at 5 A, SS2150-LTP at 2 A) are included for applications requiring higher current capacity while maintaining the same voltage rating and package form factor.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - DC Reverse (Vr) (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Current - Reverse Leakage @ Vr	Operating Temperature - Junction	Product Status	Grade	Qualification
SS115HR3G	Taiwan Semiconductor Corporation	150 V	1 A	500 mV @ 1 A	100 µA @ 150 V	-55°C ~ 125°C	Discontinued	Automotive	AEC-Q101
SS115	Taiwan Semiconductor Corporation	150 V	1 A	500 mV @ 1 A	100 µA @ 150 V	-55°C ~ 125°C	Active	—	—
SS115H	Taiwan Semiconductor Corporation	150 V	1 A	500 mV @ 1 A	100 µA @ 150 V	-55°C ~ 125°C	Active	Automotive	AEC-Q101
CDBA1150-HF	Comchip Technology	150 V	1 A	870 mV @ 1 A	500 µA @ 150 V	-50°C ~ 175°C	Active	—	—
CDBA1200-HF	Comchip Technology	150 V	1 A	900 mV @ 1 A	500 µA @ 200 V	-50°C ~ 175°C	Active	—	—
CDBA2150-HF	Comchip Technology	150 V	2 A	870 mV @ 2 A	500 µA @ 150 V	-55°C ~ 150°C	Active	—	—
CDBA3150-HF	Comchip Technology	150 V	3 A	870 mV @ 2 A	500 µA @ 150 V	-50°C ~ 175°C	Active	—	—
CDBA5150-HF	Comchip Technology	150 V	5 A	870 mV @ 5 A	500 µA @ 150 V	-50°C ~ 175°C	Active	—	—
SS1150-LTP	Micro Commercial Co	150 V	1 A	900 mV @ 1 A	50 µA @ 150 V	-50°C ~ 150°C	Active	—	—
SS2150-LTP	Micro Commercial Co	150 V	2 A	900 mV @ 2 A	500 µA @ 150 V	-55°C ~ 125°C	Active	—	—
STPS1150A	STMicroelectronics	150 V	1 A	820 mV @ 1 A	1 µA @ 150 V	175°C (Max)	Active	—	—

Engineering Selection Recommendations

Parametric Equivalent Selection: The SS115H represents the direct parametric equivalent to the SS115HR3G with identical electrical specifications and automotive qualification. This part maintains AEC-Q101 qualification and is currently in active production status, making it the primary replacement for discontinued applications requiring automotive-grade components.

The SS115 (non-H variant) provides identical electrical performance but lacks automotive grade designation and AEC-Q101 qualification. Selection of this part is appropriate for non-automotive applications where automotive qualification is not required.

Similar Part Selection for 1 A Applications: For applications where automotive qualification is not mandatory, the CDBA1150-HF, CDBA1200-HF, SS1150-LTP, and STPS1150A provide functional equivalence at the 150 V / 1 A rating. These parts are in active production and offer extended operating temperature ranges in certain cases. Forward voltage characteristics vary across these options, ranging from 500 mV to 900 mV at 1 A, and reverse leakage current specifications differ significantly.

Higher Current Rating Selection: Applications requiring current capacity beyond 1 A may utilize CDBA2150-HF (2 A), CDBA3150-HF (3 A), CDBA5150-HF (5 A), or SS2150-LTP (2 A) while maintaining the 150 V voltage rating and DO-214AC package form factor. These parts are suitable for designs where thermal management and current distribution allow for single-device operation at elevated current levels.

Compliance Considerations: All listed parts maintain ROHS3 compliance and REACH unaffected status. Parts designated with automotive grade and AEC-Q101 qualification are restricted to applications requiring these certifications. Non-qualified parts are suitable for general industrial and consumer applications.

Frequently Asked Questions (FAQ)

Q: Can SS115H be used as a direct replacement for SS115HR3G?

A: Yes. The SS115H maintains identical electrical specifications (150 V, 1 A, 500 mV forward voltage at 1 A, 100 µA reverse leakage) and package configuration (DO-214AC, SMA). Both parts carry automotive grade designation and AEC-Q101 qualification. The primary difference is product status: SS115HR3G is discontinued while SS115H is in active production.

Q: What is the difference between SS115 and SS115H?

A: Both parts share identical electrical ratings and package specifications. The SS115H includes automotive grade designation and AEC-Q101 qualification, while the SS115 does not carry these designations. Selection depends on whether automotive qualification is required for the application.

Q: Can CDBA1150-HF replace SS115HR3G in automotive applications?

A: CDBA1150-HF maintains the same voltage (150 V) and current (1 A) ratings and package (DO-214AC, SMA). However, it exhibits higher forward voltage (870 mV versus 500 mV at 1 A) and higher reverse leakage current (500 µA versus 100 µA at 150 V). CDBA1150-HF does not carry automotive grade or AEC-Q101 qualification. Use in automotive applications requires verification that these parameter differences are acceptable for the specific circuit design.

Q: What are the key parameter differences between 1 A and 2 A rated parts?

A: Parts rated for 2 A (CDBA2150-HF, SS2150-LTP) maintain the same 150 V voltage rating and DO-214AC package as 1 A devices. The primary differences are current capacity and junction capacitance. These parts are suitable for applications requiring higher current handling while maintaining the same voltage rating and package footprint.

Q: Why does STPS1150A show different reverse leakage current (1 µA) compared to other parts?

A: STPS1150A is manufactured by STMicroelectronics and exhibits significantly lower reverse leakage current (1 µA at 150 V) compared to other listed parts (50 µA to 500 µA). This represents a design characteristic difference between manufacturers. The lower leakage may be advantageous in applications sensitive to reverse current, but forward voltage characteristics (820 mV at 1 A) differ from the original part.

Q: Are all listed parts available in the same packaging?

A: All listed parts use DO-214AC (SMA) surface mount package. Packaging variants (Tape & Reel, Cut Tape & Digi-Reel) differ by supplier and distribution method but do not affect the component's electrical or mechanical interface characteristics.

Q: What operating temperature range should be considered when selecting a substitute?

A: The original SS115HR3G operates from -55°C to 125°C junction temperature. Substitute parts exhibit varying temperature ranges: some extend to 175°C maximum junction temperature (CDBA1150-HF, CDBA3150-HF, CDBA5150-HF, STPS1150A), while others maintain -55°C to 125°C or -50°C to 150°C ranges. Selection should verify that the substitute part's operating temperature range meets or exceeds the application's thermal requirements.

Q: Can higher-rated current parts (2 A, 3 A, 5 A) be used in 1 A applications?

A: Yes. Higher current-rated parts maintain the same voltage rating (150 V) and package (DO-214AC, SMA). They are electrically compatible with 1 A circuit designs. The higher current rating provides additional thermal margin and current capacity headroom. Forward voltage and reverse leakage characteristics differ from the original part and should be verified against circuit requirements.

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