SS33HR7G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS33HR7G is a 30V, 3A Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation in DO-214AB (SMC) surface mount package. This part is classified as discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement. The SS33HR7G is qualified to AEC-Q101 automotive standards and complies with ROHS3 and REACH requirements. Equivalent and substitute parts must maintain electrical performance within the specified parameters while accommodating available packaging and manufacturer options.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500	µA @ 30 V
Technology	Schottky	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 125	°C
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
AEC-Q101 Qualification	Yes	—

Substitute Part Grouping Explanation

Substitution of the SS33HR7G is determined by strict equivalence in the following electrical parameters: reverse voltage rating (30V), average rectified current (3A), forward voltage drop (500 mV @ 3A), and fast recovery speed (≤ 500ns). All substitute parts must operate within the junction temperature range of -55°C to 125°C or higher, maintain Schottky technology, and support surface mount assembly in compatible package formats.

Substitute parts are grouped into two categories:

Direct Electrical Equivalents (Same Current Rating - 3A): Parts maintaining identical 30V/3A specifications with forward voltage of 500 mV @ 3A and fast recovery characteristics. These parts are interchangeable in applications where the original SS33HR7G performance envelope is required.

Higher Current Rated Alternatives (5A and Above): Parts with 30V reverse voltage but higher current ratings (5A, 8A, 15A). These parts are electrically compatible for 3A operation but provide additional current margin. Selection depends on application thermal and current distribution requirements.

Package Variants: Substitute parts may be supplied in alternative surface mount packages (SMA, SMB, SMC, DO-214AB) within the same mechanical footprint family. Package selection is determined by PCB layout constraints and assembly equipment compatibility.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf @ If	Package	Temp Range	RoHS	AEC-Q101	Status
SS33HR7G	Taiwan Semiconductor	30V	3A	500 mV @ 3A	DO-214AB (SMC)	-55 to 125°C	ROHS3	Yes	Discontinued
B330Q-13-F	Diodes Incorporated	30V	3A	500 mV @ 3A	DO-214AB (SMC)	-55 to 150°C	ROHS3	Yes	Active
5821SMJE3/TR13	Microchip Technology	30V	3A	480 mV @ 3A	DO-214AB	-55 to 150°C	ROHS3	No	Active
5821SMJ/TR13	Microchip Technology	30V	3A	480 mV @ 3A	DO-214AB	-55 to 150°C	Non-compliant	No	Active
B330A-13-F	Diodes Incorporated	30V	3A	500 mV @ 3A	DO-214AC (SMA)	-55 to 150°C	ROHS3	Yes	Active
B330B-13-F	Diodes Incorporated	30V	3A	500 mV @ 3A	DO-214AA (SMB)	-55 to 150°C	ROHS3	Yes	Active
B530C-13-F	Diodes Incorporated	30V	5A	550 mV @ 5A	DO-214AB (SMC)	-55 to 150°C	ROHS3	No	Active
B530CQ-13-F	Diodes Incorporated	30V	5A	700 mV @ 5A	DO-214AB (SMC)	-55 to 150°C	ROHS3	Yes	Active
HSM830J/TR13	Microchip Technology	30V	8A	620 mV @ 8A	DO-214AB	-55 to 175°C	Non-compliant	No	Active
HSM830JE3/TR13	Microchip Technology	30V	8A	620 mV @ 8A	DO-214AB	-55 to 175°C	ROHS3	No	Active
SK153-TP	Micro Commercial Co	30V	15A	550 mV @ 15A	DO-214AB (HSMC)	-55 to 125°C	ROHS3	No	Obsolete

Engineering Selection Recommendations

Primary Direct Equivalent: B330Q-13-F (Diodes Incorporated) is the recommended direct substitute for SS33HR7G. This part maintains identical electrical specifications (30V, 3A, 500 mV @ 3A), operates across an extended temperature range (-55 to 150°C), carries ROHS3 compliance, and holds AEC-Q101 automotive qualification. The part is in active production status with confirmed inventory availability.

Alternative Direct Equivalent: B330A-13-F and B330B-13-F (Diodes Incorporated) provide equivalent electrical performance with identical forward voltage characteristics. These parts differ only in package format (SMA and SMB respectively) and are suitable for applications where PCB layout accommodates alternative surface mount packages. Both maintain ROHS3 compliance and AEC-Q101 qualification.

Microchip Technology Options: 5821SMJE3/TR13 provides electrical equivalence with marginally lower forward voltage (480 mV @ 3A) and extended temperature range (-55 to 150°C). This part carries ROHS3 compliance but lacks AEC-Q101 qualification. The non-compliant variant 5821SMJ/TR13 is available but not recommended for automotive applications requiring AEC-Q101 certification.

Higher Current Alternatives: B530C-13-F, B530CQ-13-F, HSM830JE3/TR13, and SK153-TP are suitable for applications where the 3A current rating of the original part is insufficient. These parts maintain 30V reverse voltage rating and fast recovery characteristics but operate at higher current levels (5A, 8A, 15A respectively). Forward voltage increases proportionally with current rating. B530CQ-13-F and HSM830JE3/TR13 carry ROHS3 compliance. SK153-TP is classified as obsolete and should not be selected for new designs.

Compliance Considerations: For applications requiring ROHS3 compliance and AEC-Q101 automotive qualification, B330Q-13-F remains the optimal choice. Applications not requiring automotive qualification may consider Microchip Technology alternatives with ROHS3 compliance (5821SMJE3/TR13, HSM830JE3/TR13).

Frequently Asked Questions (FAQ)

Q: Can B330Q-13-F directly replace SS33HR7G without PCB modification?

A: Yes. B330Q-13-F is electrically and mechanically equivalent to SS33HR7G. Both parts use DO-214AB (SMC) package format with identical pinout and footprint. No PCB layout changes are required.

Q: What is the difference between B330A-13-F, B330B-13-F, and B330Q-13-F?

A: All three parts are manufactured by Diodes Incorporated with identical electrical specifications (30V, 3A, 500 mV @ 3A). The differences are package formats: B330A-13-F uses SMA (DO-214AC), B330B-13-F uses SMB (DO-214AA), and B330Q-13-F uses SMC (DO-214AB). Selection depends on PCB footprint requirements and assembly equipment compatibility.

Q: Why does 5821SMJE3/TR13 have lower forward voltage (480 mV) than SS33HR7G (500 mV)?

A: Forward voltage variation within the 30V/3A Schottky diode category reflects different semiconductor junction designs and manufacturing processes between manufacturers. The 20 mV difference is within acceptable tolerance for most applications and results in slightly lower power dissipation in the Microchip part.

Q: Can I use B530C-13-F (5A rated) in place of SS33HR7G (3A rated)?

A: B530C-13-F is electrically compatible for 3A operation and maintains 30V reverse voltage rating. The higher current rating provides additional design margin. However, forward voltage increases to 550 mV @ 5A. This part is suitable only if the application circuit can accommodate the higher forward voltage drop and if thermal management is adequate.

Q: Is SK153-TP (15A rated) a suitable substitute?

A: SK153-TP is classified as obsolete and should not be selected for new designs or ongoing production. Although electrically compatible at 3A operation, the obsolete status creates long-term supply risk and procurement uncertainty.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 qualification indicates the part meets automotive industry reliability and quality standards established by the Automotive Electronics Council. For automotive applications, AEC-Q101 qualified parts (B330Q-13-F, B330A-13-F, B330B-13-F) are required. Non-qualified alternatives are acceptable only for non-automotive applications.

Q: Does the extended temperature range (-55 to 150°C) of B330Q-13-F provide any advantage over SS33HR7G (-55 to 125°C)?

A: The extended upper temperature limit of B330Q-13-F provides additional thermal margin in high-temperature operating environments. For applications operating within the original -55 to 125°C range, both parts perform identically. The extended range offers design flexibility for future thermal stress scenarios.

Q: Are all substitute parts ROHS3 compliant?

A: No. 5821SMJ/TR13 and HSM830J/TR13 are RoHS non-compliant. For applications requiring ROHS3 compliance, select from B330Q-13-F, B330A-13-F, B330B-13-F, 5821SMJE3/TR13, B530C-13-F, B530CQ-13-F, HSM830JE3/TR13, or SK153-TP.

Q: What packaging format should I select for new PCB designs?

A: For new designs, B330Q-13-F (SMC/DO-214AB) is recommended as it matches the original SS33HR7G package format and maintains full compatibility with existing design specifications. Alternative packages (SMA, SMB) are acceptable only if PCB layout constraints require different footprints.

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