SS33HE3_A/I Equivalent & Substitute Parts

Part Overview

The SS33HE3_A/I 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 classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing production and design requirements. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts satisfy the same functional requirements within the defined parameter tolerances.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the SS33HE3_A/I is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 30V
Current - Average Rectified (Io): 3A
Voltage - Forward (Vf) (Max) @ If: 500mV @ 3A (or lower)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: ≤ 500µA @ 30V
Mounting Type: Surface Mount
Package / Case: DO-214AB, SMC
Operating Temperature - Junction: -55°C minimum, 125°C minimum

Allowable Variations:

Operating Temperature - Junction: Upper limit may exceed 125°C (125°C to 150°C acceptable)
Current - Reverse Leakage @ Vr: Values lower than 500µA @ 30V are acceptable
Voltage - Forward (Vf) (Max) @ If: Values lower than 500mV @ 3A are acceptable
Packaging format (Tape & Reel, Cut Tape, Digi-Reel) does not affect electrical equivalence
RoHS compliance status does not affect functional substitution

Substitute parts are grouped into two categories: Vishay direct equivalents (same manufacturer, identical base product SS33) and cross-manufacturer parametric equivalents (alternative manufacturers meeting all electrical and mechanical specifications).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV @ 3A]	Ir @ Vr [µA @ 30V]	Tj (Min-Max) [°C]	Package	Product Status	RoHS
SS33HE3_A/I	Vishay	30	3	500 @ 3	500	-55 to 125	DO-214AB, SMC	Discontinued	ROHS3
SS33HE3_B/I	Vishay	30	3	500 @ 3	500	-55 to 150	DO-214AB, SMC	Active	ROHS3
SS33-E3/57T	Vishay	30	3	500 @ 3	500	-55 to 125	DO-214AB, SMC	Active	ROHS3
SS33-E3/9AT	Vishay	30	3	500 @ 3	500	-55 to 125	DO-214AB, SMC	Active	ROHS3
SS33-M3/57T	Vishay	30	3	500 @ 3	500	-55 to 125	DO-214AB, SMC	Active	ROHS3
SS33-M3/9AT	Vishay	30	3	500 @ 3	500	-55 to 125	DO-214AB, SMC	Active	ROHS3
5821SMJ/TR13	Microchip Technology	30	3	480 @ 3	1500	-55 to 150	DO-214AB, SMC	Active	Non-compliant
SK33-TP	Micro Commercial Co	30	3	500 @ 3	500	-55 to 150	DO-214AB, SMC	Not For New Designs	ROHS3
B330-13-F	Diodes Incorporated	30	3	500 @ 3	500	-55 to 125	DO-214AB, SMC	Active	ROHS3
SK33/TR13	Microsemi Corporation	30	3	500 @ 3	500	-55 to 125	DO-214AB, SMC	Active	Non-compliant
SK33_R1_00001	Panjit International Inc.	30	3	500 @ 3	200	-55 to 125	DO-214AB, SMC	Active	ROHS3

Engineering Selection Recommendations

Primary Recommendation: Vishay Direct Equivalents

For applications requiring direct replacement of the discontinued SS33HE3_A/I, the following Vishay parts are recommended as primary substitutes:

SS33HE3_B/I: Direct Vishay equivalent with extended operating temperature range (-55°C to 150°C). Active product status with ROHS3 compliance. Identical electrical specifications with improved thermal performance envelope.
SS33-E3/9AT: Vishay parametric equivalent with highest inventory availability (14,400 pcs). Active product status with ROHS3 compliance. Identical electrical and thermal specifications. Tape & Reel packaging format.
SS33-M3/57T and SS33-M3/9AT: Vishay parametric equivalents with active product status and ROHS3 compliance. Identical electrical specifications. Available in multiple packaging formats.

Secondary Recommendation: Cross-Manufacturer Equivalents

B330-13-F (Diodes Incorporated): Active product with ROHS3 compliance. Meets all electrical specifications. Highest inventory availability (62,100 pcs). Suitable for applications where manufacturer diversification is required.
SK33_R1_00001 (Panjit International Inc.): Active product with ROHS3 compliance. Reverse leakage current of 200µA @ 30V (lower than specified maximum of 500µA), providing improved performance margin. Suitable for low-leakage applications.

Not Recommended for New Designs:

SK33-TP (Micro Commercial Co): Product status designated "Not For New Designs." Use only for legacy system maintenance where no alternative is available.
5821SMJ/TR13 (Microchip Technology): RoHS non-compliant. Reverse leakage current of 1500µA @ 30V exceeds specified maximum of 500µA. Use only where RoHS non-compliance is acceptable and higher leakage current is tolerated.
SK33/TR13 (Microsemi Corporation): RoHS non-compliant. Use only where RoHS non-compliance is acceptable.

Frequently Asked Questions (FAQ)

Q: Can SS33HE3_B/I be used as a direct replacement for SS33HE3_A/I?

A: Yes. SS33HE3_B/I is a direct Vishay equivalent with identical electrical specifications (30V, 3A, 500mV forward voltage, 500µA reverse leakage). The extended operating temperature range (-55°C to 150°C versus -55°C to 125°C) provides additional thermal margin. Both parts use the same DO-214AB (SMC) package and are ROHS3 compliant.

Q: What is the difference between SS33-E3/9AT and SS33-M3/9AT?

A: Both parts are Vishay parametric equivalents with identical electrical specifications and operating temperature range (-55°C to 125°C). The primary difference is packaging format and inventory availability. SS33-E3/9AT has significantly higher inventory (14,400 pcs) compared to SS33-M3/9AT (931 pcs). Both are active products with ROHS3 compliance.

Q: Is B330-13-F from Diodes Incorporated a suitable substitute?

A: Yes. B330-13-F meets all electrical requirements: 30V reverse voltage, 3A average rectified current, 500mV forward voltage, and 500µA reverse leakage. It uses the same DO-214AB (SMC) package and is ROHS3 compliant. Highest inventory availability (62,100 pcs) makes it suitable for applications requiring manufacturer diversification.

Q: Why is SK33_R1_00001 recommended over other alternatives?

A: SK33_R1_00001 (Panjit International Inc.) meets all electrical specifications with a reverse leakage current of 200µA @ 30V, which is lower than the specified maximum of 500µA. This provides improved performance margin in applications sensitive to leakage current. The part is active and ROHS3 compliant.

Q: Can 5821SMJ/TR13 be used as a substitute?

A: 5821SMJ/TR13 (Microchip Technology) meets the core electrical requirements (30V, 3A, 480mV forward voltage). However, the reverse leakage current is 1500µA @ 30V, which exceeds the specified maximum of 500µA by a factor of three. This part is RoHS non-compliant. Use only in applications where higher leakage current is acceptable and RoHS non-compliance is permitted.

Q: What packaging formats are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Tape & Reel (TR), Cut Tape (CT) with Digi-Reel, and bulk packaging. Packaging format does not affect electrical equivalence. Selection should be based on assembly process requirements and inventory management practices. All parts use the same DO-214AB (SMC) surface mount package.

Q: Are all substitute parts ROHS3 compliant?

A: No. Most Vishay and Diodes Incorporated parts are ROHS3 compliant. However, 5821SMJ/TR13 (Microchip Technology) and SK33/TR13 (Microsemi Corporation) are RoHS non-compliant. Verify RoHS compliance requirements for your application before selection.

Q: What is the operating temperature range difference between substitute parts?

A: Most substitute parts operate from -55°C to 125°C, matching the original SS33HE3_A/I specification. SS33HE3_B/I, 5821SMJ/TR13, and SK33-TP extend the upper limit to 150°C, providing additional thermal margin for high-temperature applications. Verify application temperature requirements before selection.

Q: Can substitute parts be mixed in the same production run?

A: Yes, provided all selected parts meet the application's electrical and compliance requirements. Vishay parts (SS33HE3_B/I, SS33-E3/9AT, SS33-M3/57T, SS33-M3/9AT) are recommended for consistency within a single design. Cross-manufacturer substitution (B330-13-F, SK33_R1_00001) is acceptable where manufacturer diversification is required, provided electrical specifications are verified.

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