Equivalent & Substitute Parts for 1SMA5933H Zener Diode

Part Overview

The 1SMA5933H is a 22 V, 1.5 W surface mount zener diode manufactured by Taiwan Semiconductor Corporation in the DO-214AC (SMA) package. This component is classified as an active product with AEC-Q101 automotive qualification and ROHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs within the specified parameter tolerances.

Substiute Parts

1SMA5933H

Taiwan Semiconductor CorporationIn Stock: 11181SMA5933H Datasheet

Current PartRFQ

1SMA5933

Taiwan Semiconductor CorporationIn Stock: 84181SMA5933 Datasheet

Parametric EquivalentRFQ

1SMA5933BT3G

onsemiIn Stock: 404531SMA5933BT3G Datasheet

SimilarRFQ

SMAJ4748A-TP

Micro Commercial CoIn Stock: 3330SMAJ4748A-TP Datasheet

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SMAZ22-TP

Micro Commercial CoIn Stock: 30974SMAZ22-TP Datasheet

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SML4748A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 30348SML4748A-E3/61 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1SMA5933H are grouped based on the following critical parameters that determine functional equivalence:

Primary Equivalence Criteria:

• Voltage - Zener (Nominal): 22 V
• Tolerance: ±5%
• Package / Case: DO-214AC, SMA (surface mount compatibility)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Secondary Consideration:

• Power - Maximum: Substitutes with 1 W power rating are acceptable where circuit design permits reduced power dissipation capacity compared to the 1.5 W main part

Parametric Equivalent (Full Compatibility): The part 1SMA5933 from Taiwan Semiconductor Corporation maintains identical electrical specifications and package configuration, differing only in packaging format (Tape & Reel).

Similar Substitutes (Conditional Compatibility): Parts 1SMA5933BT3G, SMAJ4748A-TP, SMAZ22-TP, and SML4748A-E3/61 share the 22 V zener voltage and ±5% tolerance with surface mount DO-214AC packaging. Variations in power rating (1 W versus 1.5 W), impedance, reverse leakage current, and operating temperature ranges are documented in the parameter comparison table below.

Parameter Comparison

Engineering Selection Recommendations

Full Equivalence (Direct Substitution): The part 1SMA5933 is a parametric equivalent to 1SMA5933H with identical electrical specifications and package configuration. Both parts are active products with ROHS3 compliance and MSL 1 rating.

Qualified Substitution (1SMA5933BT3G): The onsemi part 1SMA5933BT3G maintains all critical electrical parameters (22 V, 1.5 W, ±5% tolerance, 17.5 Ω impedance, 500 nA reverse leakage) and surface mount DO-214AC packaging. This part extends the operating temperature range to -65°C and carries ROHS3 compliance. Packaging format differs (Cut Tape & Digi-Reel® versus Tape & Reel).

Conditional Substitution (SMAJ4748A-TP, SMAZ22-TP, SML4748A-E3/61): These parts share the 22 V zener voltage, ±5% tolerance, and DO-214AC surface mount package. All three are rated at 1 W maximum power, representing a 33% reduction in power dissipation capacity compared to the 1.5 W main part. Selection of these substitutes is appropriate only when circuit design requirements do not exceed 1 W power dissipation. SMAZ22-TP maintains the 500 nA reverse leakage specification of the main part, while SMAJ4748A-TP and SML4748A-E3/61 specify 5 µA reverse leakage. All substitute parts are active products with ROHS3 compliance and MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can 1SMA5933BT3G be used as a direct replacement for 1SMA5933H?

A: Yes. The 1SMA5933BT3G maintains identical zener voltage (22 V), tolerance (±5%), power rating (1.5 W), impedance (17.5 Ω), and reverse leakage current (500 nA @ 16.7 V). Both use the DO-214AC surface mount package. The onsemi part extends the operating temperature range to -65°C and uses a different packaging format (Cut Tape & Digi-Reel® instead of Tape & Reel).

Q: What is the difference between 1.5 W and 1 W power-rated zener diodes?

A: Power rating indicates the maximum continuous power dissipation the diode can handle. The 1SMA5933H is rated for 1.5 W, while SMAJ4748A-TP, SMAZ22-TP, and SML4748A-E3/61 are rated for 1 W. Substitution with a 1 W part is valid only if the circuit design ensures power dissipation does not exceed 1 W under all operating conditions.

Q: Are all substitute parts in the same DO-214AC package?

A: Yes. All listed substitute parts use the DO-214AC (SMA) surface mount package, ensuring mechanical and electrical compatibility with PCB layouts designed for the 1SMA5933H.

Q: What is the significance of reverse leakage current differences?

A: The 1SMA5933H specifies 500 nA reverse leakage at 16.7 V. SMAJ4748A-TP and SML4748A-E3/61 specify 5 µA, representing a 10-fold increase. SMAZ22-TP maintains the 500 nA specification. Higher reverse leakage may affect circuit performance in applications sensitive to leakage current, such as precision voltage reference circuits.

Q: Do all substitute parts meet automotive qualification standards?

A: The 1SMA5933H carries AEC-Q101 automotive qualification. The substitute parts listed do not explicitly state AEC-Q101 qualification in the provided specifications. Verification of automotive qualification requirements should be performed against specific application standards.

Q: What is the difference between Tape & Reel and Cut Tape packaging formats?

A: Both are surface mount packaging formats suitable for automated assembly. Tape & Reel (TR) provides continuous reel packaging for high-volume production. Cut Tape (CT) and Digi-Reel® provide smaller quantities in tape format. Packaging format does not affect electrical performance or PCB compatibility.

Q: Can SMAZ22-TP be used in place of 1SMA5933H?

A: SMAZ22-TP is a conditional substitute. It matches the 22 V zener voltage, ±5% tolerance, DO-214AC package, and 500 nA reverse leakage specification. However, it is rated for 1 W maximum power versus the 1.5 W rating of the main part. Substitution is valid only if circuit power dissipation does not exceed 1 W.