SS33HE3_A/H Equivalent & Substitute Parts

Part Overview

The SS33HE3_A/H is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 30V DC reverse voltage and 3A average rectified current in a surface mount DO-214AB (SMC) package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility for new procurement and design continuity.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 30 V
Technology	Schottky
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SS33HE3_A/H is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 30 V
Current - Average Rectified (Io): 3 A
Technology: Schottky
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Up to 500 mV @ 3 A
Current - Reverse Leakage @ Vr: Up to 500 µA @ 30 V (lower values acceptable)
Operating Temperature - Junction: Minimum -55°C to maximum ≥ 125°C
RoHS Compliance: ROHS3 Compliant preferred; non-compliant parts noted

Substitute parts are grouped into three categories: Direct Manufacturer Equivalents (same manufacturer, different packaging or temperature rating), Parametric Equivalents (same electrical specifications, different manufacturer), and Manufacturer Recommended Alternatives (cross-manufacturer substitutes with equivalent performance).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Reverse Leakage @ Vr	Tj (Operating)	Product Status	RoHS Status
SS33HE3_A/H	Vishay General Semiconductor	30 V	3 A	500 mV @ 3 A	500 µA @ 30 V	-55°C ~ 125°C	Discontinued	ROHS3 Compliant
SS33HE3_B/H	Vishay General Semiconductor	30 V	3 A	500 mV @ 3 A	500 µA @ 30 V	-55°C ~ 150°C	Active	ROHS3 Compliant
SS33-E3/57T	Vishay General Semiconductor	30 V	3 A	500 mV @ 3 A	500 µA @ 30 V	-55°C ~ 125°C	Active	ROHS3 Compliant
SS33-E3/9AT	Vishay General Semiconductor	30 V	3 A	500 mV @ 3 A	500 µA @ 30 V	-55°C ~ 125°C	Active	ROHS3 Compliant
SS33-M3/57T	Vishay General Semiconductor	30 V	3 A	500 mV @ 3 A	500 µA @ 30 V	-55°C ~ 125°C	Active	ROHS3 Compliant
SS33-M3/9AT	Vishay General Semiconductor	30 V	3 A	500 mV @ 3 A	500 µA @ 30 V	-55°C ~ 125°C	Active	ROHS3 Compliant
5821SMJ/TR13	Microchip Technology	30 V	3 A	480 mV @ 3 A	1.5 mA @ 30 V	-55°C ~ 150°C	Active	RoHS non-compliant
SK33-TP	Micro Commercial Co	30 V	3 A	500 mV @ 3 A	500 µA @ 30 V	-55°C ~ 150°C	Not For New Designs	ROHS3 Compliant
B330-13-F	Diodes Incorporated	30 V	3 A	500 mV @ 3 A	500 µA @ 30 V	-55°C ~ 125°C	Active	ROHS3 Compliant
SK33/TR13	Microsemi Corporation	30 V	3 A	500 mV @ 3 A	500 µA @ 30 V	-55°C ~ 125°C	Active	RoHS non-compliant
SK33_R1_00001	Panjit International Inc.	30 V	3 A	500 mV @ 3 A	200 µA @ 30 V	-55°C ~ 125°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation - Direct Manufacturer Equivalent: SS33HE3_B/H (Vishay General Semiconductor) is the direct successor to the discontinued SS33HE3_A/H. This part maintains identical electrical specifications with an extended operating temperature range (-55°C ~ 150°C versus -55°C ~ 125°C), active product status, and ROHS3 compliance. Tape & Reel packaging is available with 789 pieces in stock.

Secondary Recommendations - Vishay Parametric Equivalents: SS33-E3/57T, SS33-E3/9AT, SS33-M3/57T, and SS33-M3/9AT are all Vishay-manufactured parametric equivalents with identical electrical performance and ROHS3 compliance. These parts differ only in packaging format (Cut Tape & Digi-Reel or Tape & Reel variants). All maintain the -55°C ~ 125°C operating temperature range. Inventory availability ranges from 931 to 14,400 pieces.

Cross-Manufacturer Alternatives: B330-13-F (Diodes Incorporated) and SK33_R1_00001 (Panjit International Inc.) are parametric equivalents with full electrical compatibility and ROHS3 compliance. B330-13-F offers the highest inventory availability (62,100 pieces). SK33_R1_00001 features lower reverse leakage current (200 µA versus 500 µA), which may provide performance benefits in specific applications.

Non-Recommended Alternatives: SK33-TP (Micro Commercial Co) carries a "Not For New Designs" status and should not be selected for new applications. 5821SMJ/TR13 (Microchip Technology) and SK33/TR13 (Microsemi Corporation) are RoHS non-compliant and should be avoided unless legacy system requirements mandate their use.

Frequently Asked Questions (FAQ)

Q: Can SS33HE3_B/H be used as a direct replacement for SS33HE3_A/H? A: Yes. SS33HE3_B/H is the direct manufacturer equivalent with identical electrical specifications (30V, 3A, 500mV forward voltage, 500µA reverse leakage). The primary difference is extended operating temperature range (-55°C ~ 150°C) and active product status. Tape & Reel packaging is standard.

Q: What is the difference between SS33-E3/57T and SS33-E3/9AT? A: Both parts are Vishay parametric equivalents with identical electrical specifications. The designations reflect different packaging formats: SS33-E3/57T is supplied in Cut Tape & Digi-Reel format, while SS33-E3/9AT is supplied in Tape & Reel format. Electrical performance is equivalent.

Q: Is B330-13-F compatible with the original SS33HE3_A/H? A: Yes. B330-13-F (Diodes Incorporated) meets all mandatory electrical parameters: 30V reverse voltage, 3A current rating, 500mV forward voltage, and 500µA reverse leakage. Package and mounting type are identical (DO-214AB, SMC, surface mount). ROHS3 compliance is confirmed. Highest inventory availability among alternatives.

Q: Why is SK33-TP marked "Not For New Designs"? A: SK33-TP carries a "Not For New Designs" product status designation. While electrically compatible, this status indicates the manufacturer recommends against selection for new applications. Use only for legacy system maintenance or replacement scenarios.

Q: What is the significance of reverse leakage current differences between substitutes? A: Reverse leakage current is provided in the parameter comparison table. SK33_R1_00001 specifies 200 µA @ 30V, while most alternatives specify 500 µA @ 30V. Lower reverse leakage may reduce power dissipation in specific circuit topologies. Selection should be based on application requirements.

Q: Are all substitute parts RoHS compliant? A: No. Most Vishay, Diodes Incorporated, and Panjit parts are ROHS3 compliant. However, 5821SMJ/TR13 (Microchip) and SK33/TR13 (Microsemi) are RoHS non-compliant. Compliance requirements should be verified against application and regulatory standards.

Q: Can parts with different operating temperature ranges be interchanged? A: Yes, provided the application operating temperature falls within the specified range of the substitute part. SS33HE3_B/H offers extended range (-55°C ~ 150°C) compared to the original (-55°C ~ 125°C). Parts with lower maximum temperature ratings (125°C) are suitable for applications not exceeding this limit.

Q: What packaging options are available for substitutes? A: Substitute parts are available in multiple packaging formats: Tape & Reel (TR), Cut Tape (CT) & Digi-Reel, and standard packaging. All maintain the DO-214AB (SMC) component package. Packaging selection should align with assembly equipment and procurement requirements.

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