Equivalent & Substitute Parts for SS1H9 Schottky Diode

Part Overview

The SS1H9 is an active Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 90 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as a fast recovery diode with switching characteristics suitable for general rectification applications. Equivalent and substitute parts are identified to address inventory availability, packaging format requirements, compliance certifications, and performance parameter variations within acceptable operating ranges.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	90	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	770	mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	1	µA @ 90 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction (Max)	175	°C
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SS1H9 are grouped into three categories based on electrical and mechanical compatibility:

Category 1: Parametric Equivalents (Identical Electrical Specifications) Parts that maintain the same voltage rating (90 V), current rating (1 A), forward voltage drop (770 mV @ 1 A), and reverse leakage current (1 µA @ 90 V). These parts differ only in packaging format or RoHS compliance status. Substitution within this category requires no circuit re-evaluation.

Category 2: Voltage-Rated Upgrades (Higher Voltage Rating) Parts rated for 100 V reverse voltage with 1 A current capacity. These parts operate within the same current envelope but provide increased voltage margin. Forward voltage drop increases to 790 mV @ 1 A. Substitution is valid for applications where the higher voltage rating does not create thermal or performance concerns.

Category 3: Current-Rated Upgrades (Higher Current Capacity) Parts rated for 2 A average rectified current at 100 V reverse voltage. These parts exceed the original current specification and are suitable for applications requiring higher current handling. Forward voltage drop is 790 mV @ 2 A.

Key Parameters Determining Substitution:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 90 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Technology: Schottky (mandatory)
Mounting Type: Surface Mount (mandatory)
Package / Case: DO-214AC, SMA (mandatory)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (mandatory)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Tj (Max) [°C]	RoHS Status	Packaging
SS1H9	Vishay	90	1	770 @ 1 A	1 @ 90 V	175	Non-compliant	—
SS1H9-E3/61T	Vishay	90	1	770 @ 1 A	1 @ 90 V	175	ROHS3 Compliant	Cut Tape (CT)
B190-13-F	Diodes Incorporated	90	1	790 @ 1 A	500 @ 90 V	150	ROHS3 Compliant	Tape & Reel (TR)
B1100-13-F	Diodes Incorporated	100	1	790 @ 1 A	500 @ 100 V	150	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®
SS19	Taiwan Semiconductor Corporation	90	1	800 @ 1 A	100 @ 90 V	150	ROHS3 Compliant	—
STPS2H100A	STMicroelectronics	100	2	790 @ 2 A	1 @ 100 V	175	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®
STPS2H100AY	STMicroelectronics	100	2	790 @ 2 A	1 @ 100 V	175	ROHS3 Compliant	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): SS1H9-E3/61T is the primary equivalent, offering identical electrical specifications with ROHS3 compliance and Cut Tape packaging. This part is suitable for applications requiring exact parameter matching with improved regulatory compliance.

For RoHS3 Compliant Alternatives (90 V, 1 A Rating): B190-13-F (Diodes Incorporated) maintains the 90 V / 1 A specification with ROHS3 compliance. Forward voltage increases to 790 mV @ 1 A and reverse leakage increases to 500 µA @ 90 V. Maximum junction temperature is 150°C. This part is suitable for applications where RoHS compliance is mandatory and the increased forward voltage and leakage parameters are acceptable.

For Voltage-Rated Upgrade (100 V, 1 A Rating): B1100-13-F (Diodes Incorporated) provides 100 V reverse voltage rating with 1 A current capacity, offering increased voltage margin. Forward voltage is 790 mV @ 1 A with 500 µA reverse leakage @ 100 V. Maximum junction temperature is 150°C. This part is suitable for applications where higher voltage headroom is required and thermal constraints permit the lower maximum junction temperature.

For Current-Rated Upgrade (100 V, 2 A Rating): STPS2H100A and STPS2H100AY (STMicroelectronics) both provide 100 V / 2 A specifications with ROHS3 compliance and 175°C maximum junction temperature. STPS2H100AY includes automotive-grade qualification. These parts are suitable for applications requiring higher current capacity with maintained thermal performance. Forward voltage is 790 mV @ 2 A with 1 µA reverse leakage @ 100 V.

For Alternative Manufacturer (90 V, 1 A Rating): SS19 (Taiwan Semiconductor Corporation) maintains 90 V / 1 A specifications with ROHS3 compliance. Forward voltage is 800 mV @ 1 A with 100 µA reverse leakage @ 90 V. Maximum junction temperature is 150°C. This part is suitable for applications where alternative sourcing is required and the increased forward voltage and leakage parameters are acceptable.

Compliance Considerations: All substitute parts except the original SS1H9 carry ROHS3 compliance certification. Selection should account for regulatory requirements in target applications. All parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can SS1H9-E3/61T be used as a direct replacement for SS1H9? A: Yes. SS1H9-E3/61T is a parametric equivalent with identical electrical specifications (90 V, 1 A, 770 mV forward voltage, 1 µA reverse leakage). The primary difference is packaging format (Cut Tape) and ROHS3 compliance status. No circuit modifications are required.

Q: What is the difference between B190-13-F and B1100-13-F? A: B190-13-F is rated for 90 V reverse voltage, matching the original SS1H9 specification. B1100-13-F is rated for 100 V reverse voltage, providing increased voltage margin. Both are rated for 1 A current. B1100-13-F is suitable for applications requiring higher voltage headroom.

Q: Can STPS2H100A or STPS2H100AY replace SS1H9 in any application? A: STPS2H100A and STPS2H100AY are rated for 2 A average rectified current, exceeding the 1 A specification of SS1H9. These parts are suitable for applications where higher current capacity is required. The 100 V voltage rating also provides increased margin. Forward voltage increases to 790 mV @ 2 A. Thermal design must account for the higher current rating.

Q: What is the significance of the STPS2H100AY automotive grade designation? A: STPS2H100AY carries automotive-grade qualification (Series Q), indicating compliance with automotive reliability and testing standards. This part is suitable for automotive applications requiring qualified components. Electrical specifications are identical to STPS2H100A.

Q: Are all substitute parts available in the same DO-214AC (SMA) package? A: All substitute parts are specified for DO-214AC (SMA) package or equivalent SMA package format. Packaging format variations (Cut Tape, Tape & Reel, Digi-Reel) affect supply chain handling but do not alter electrical or mechanical compatibility.

Q: What is the impact of increased forward voltage in substitute parts? A: Substitute parts from Diodes Incorporated (B190-13-F, B1100-13-F) and Taiwan Semiconductor Corporation (SS19) show forward voltage increases to 790–800 mV @ 1 A compared to 770 mV for the original SS1H9. This results in slightly higher power dissipation in rectification circuits. Thermal design should account for this increase in applications with tight thermal budgets.

Q: Can SS19 from Taiwan Semiconductor Corporation be used as a direct replacement? A: SS19 maintains the 90 V / 1 A specification with ROHS3 compliance. Forward voltage increases to 800 mV @ 1 A and reverse leakage increases to 100 µA @ 90 V. Maximum junction temperature is 150°C. This part is suitable for applications where alternative sourcing is required and the increased forward voltage and leakage parameters are acceptable.

Q: What is the difference between Cut Tape and Tape & Reel packaging? A: Cut Tape (CT) and Tape & Reel (TR) are supply format variations that do not affect electrical or mechanical specifications. Cut Tape is supplied in individual tape segments, while Tape & Reel is supplied on continuous reels. Selection depends on assembly process requirements and inventory management practices.

Q: Are all substitute parts RoHS compliant? A: All substitute parts carry ROHS3 compliance certification. The original SS1H9 is RoHS non-compliant. Selection of substitute parts ensures compliance with RoHS regulations in target applications.

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