SML4754HE3_A/I Zener Diode Equivalent & Substitute Parts

Part Overview

The SML4754HE3_A/I is a 39 V, 1 W Zener diode manufactured by Vishay General Semiconductor - Diodes Division in the DO-214AC (SMA) surface mount package. This component is classified as an active product with AEC-Q101 automotive qualification and ROHS3 compliance. The device operates at a maximum temperature of 150°C with a nominal Zener voltage of 39 V at ±10% tolerance.

Substitute parts are identified based on matching electrical specifications (Zener voltage, power rating, impedance, and reverse leakage current) and mechanical compatibility (package type and mounting method). Packaging format variations (Tape & Reel versus Cut Tape) and tolerance tightening (±10% to ±5%) define the primary substitution categories.

Substiute Parts

SML4754HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 894SML4754HE3_A/I Datasheet

Current PartRFQ

SML4754-E3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 8579SML4754-E3/5A Datasheet

Parametric EquivalentRFQ

SML4754A-E3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 8408SML4754A-E3/5A Datasheet

Parametric EquivalentRFQ

SML4754A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 7428SML4754A-E3/61 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SML4754HE3_A/I is determined by the following criteria:

Electrical Compatibility: All substitute parts maintain the nominal Zener voltage of 39 V, maximum power dissipation of 1 W, maximum impedance of 60 Ohms, and reverse leakage current of 5 µA @ 29.7 V. These parameters ensure functional equivalence in circuit operation.

Mechanical Compatibility: All substitute parts use the DO-214AC (SMA) surface mount package with identical mounting type, ensuring PCB footprint and assembly process compatibility.

Packaging Format: Substitutes are available in two packaging formats: Tape & Reel (TR) and Cut Tape (CT). These represent different supply and handling methods with no impact on component performance.

Tolerance Variation: The main part specifies ±10% tolerance. Substitute parts SML4754A-E3/5A and SML4754A-E3/61 offer tighter ±5% tolerance, providing improved voltage accuracy while maintaining all other electrical specifications.

Compliance & Status: All substitute parts are active products with ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity level (MSL 1).

Parameter Comparison

Engineering Selection Recommendations

SML4754-E3/5A: This substitute maintains identical electrical specifications and tolerance (±10%) to the main part SML4754HE3_A/I. The primary difference is packaging format (Cut Tape versus Tape & Reel). Selection of this part is appropriate when Cut Tape supply format is preferred or required for assembly operations. All compliance certifications and product status remain equivalent.

SML4754A-E3/5A: This substitute provides tighter voltage tolerance (±5% versus ±10%) while maintaining all other electrical parameters. The part is supplied in Tape & Reel format matching the main part's packaging. Selection of this part is appropriate when improved Zener voltage accuracy is required within the circuit design constraints. Product status and compliance certifications are equivalent.

SML4754A-E3/61: This substitute provides tighter voltage tolerance (±5% versus ±10%) with identical electrical specifications. The part is supplied in Cut Tape format. Selection of this part is appropriate when both improved voltage accuracy and Cut Tape supply format are required. All compliance certifications and product status remain equivalent.

All substitute parts are active products with AEC-Q101 automotive qualification, ROHS3 compliance, and REACH unaffected status, ensuring suitability for automotive and general industrial applications.

Frequently Asked Questions (FAQ)

Q: Can SML4754-E3/5A be used as a direct replacement for SML4754HE3_A/I?

A: Yes. Both parts share identical electrical specifications: 39 V nominal Zener voltage, ±10% tolerance, 1 W maximum power, 60 Ohms maximum impedance, and 5 µA reverse leakage current. The difference is packaging format (Cut Tape versus Tape & Reel), which does not affect component performance or PCB compatibility.

Q: What is the advantage of selecting SML4754A-E3/5A or SML4754A-E3/61 over the main part?

A: Both parts offer ±5% voltage tolerance compared to the main part's ±10% tolerance. This tighter tolerance provides improved Zener voltage accuracy. All other electrical specifications remain identical. Selection depends on whether the circuit design requires this enhanced accuracy.

Q: Are there differences in package or mounting between these substitute parts?

A: All parts use the DO-214AC (SMA) surface mount package with identical mechanical dimensions and PCB footprint. Packaging format differs (Tape & Reel or Cut Tape), which affects supply and handling but not component installation or performance.

Q: Do all substitute parts meet automotive qualification requirements?

A: The main part SML4754HE3_A/I carries AEC-Q101 automotive qualification. The substitute parts SML4754-E3/5A, SML4754A-E3/5A, and SML4754A-E3/61 are all active products from Vishay General Semiconductor - Diodes Division with equivalent compliance status (ROHS3 compliant, REACH unaffected, MSL 1).

Q: Can I substitute a ±5% tolerance part for a ±10% tolerance part?

A: Yes. A ±5% tolerance part (SML4754A-E3/5A or SML4754A-E3/61) can replace a ±10% tolerance part (SML4754HE3_A/I or SML4754-E3/5A) because the tighter tolerance is a superset of the looser tolerance specification. The circuit will operate within the original design parameters.

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

A: Tape & Reel (TR) and Cut Tape (CT) are supply formats for surface mount components. Tape & Reel is supplied on continuous tape wound on a reel for automated assembly. Cut Tape is supplied on tape segments cut to specific lengths. Both formats contain identical components; the difference is in supply and handling method.