SML4751HE3_A/I Equivalent & Substitute Parts

Part Overview

The SML4751HE3_A/I is a 30 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 automotive-grade qualification (AEC-Q101) and is RoHS3 compliant. The part is supplied in Tape & Reel (TR) packaging with 1095 pieces currently in stock.

Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage circuits. Alternative part numbers may be required due to inventory availability, packaging format preferences, or tolerance specifications for particular application requirements.

Substiute Parts

SML4751HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1144SML4751HE3_A/I Datasheet

Current PartRFQ

SML4751-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 3068SML4751-E3/61 Datasheet

Parametric EquivalentRFQ

SML4751A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 5069SML4751A-E3/61 Datasheet

Parametric EquivalentRFQ

SML4751AHE3_A/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 1635SML4751AHE3_A/H Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SML4751HE3_A/I is determined by the following critical parameters that must remain constant across all equivalent parts:

• Zener Voltage (Nominal): 30 V
• Maximum Power Dissipation: 1 W
• Package / Case: DO-214AC (SMA)
• Mounting Type: Surface Mount
• Maximum Impedance: 40 Ohms
• Reverse Leakage Current: 5 µA @ 22.8 V
• Operating Temperature: 150°C

Substitute parts may differ in the following parameters while maintaining functional equivalence:

• Tolerance: ±10% (main part) or ±5% (substitute parts with tighter tolerance)
• Packaging Format: Tape & Reel (TR), Cut Tape (CT), or Digi-Reel®
• Automotive Grade / AEC-Q101 Qualification: Present in main part and one substitute; not present in others

All substitute parts share the same base product number (SML4751) and are manufactured by the same supplier, ensuring design and performance compatibility.

Parameter Comparison

Engineering Selection Recommendations

SML4751-E3/61 is a direct parametric equivalent with identical electrical specifications and automotive-grade tolerance (±10%). This part is supplied in Tape & Reel (TR) packaging, matching the main part format. It does not carry automotive-grade or AEC-Q101 qualification. This substitute is suitable for applications where automotive qualification is not required and standard tolerance is acceptable. Inventory availability is higher (3050 pieces).

SML4751A-E3/61 provides tighter tolerance specification (±5%) compared to the main part (±10%), resulting in improved voltage regulation accuracy. This part is supplied in Cut Tape (CT) and Digi-Reel® packaging formats. It does not carry automotive-grade or AEC-Q101 qualification. This substitute is suitable for applications requiring enhanced voltage accuracy where automotive qualification is not mandatory. Inventory availability is highest (5042 pieces).

SML4751AHE3_A/H is a direct equivalent with tighter tolerance (±5%) and maintains automotive-grade qualification and AEC-Q101 certification, matching the main part's compliance profile. This part is supplied in both Cut Tape (CT) / Digi-Reel® and Tape & Reel (TR) packaging formats. This substitute is suitable for automotive applications and designs requiring AEC-Q101 qualified components with improved voltage tolerance. Inventory availability is 1577 pieces.

All substitute parts maintain identical electrical performance in terms of zener voltage, power dissipation, impedance, leakage current, and operating temperature. Selection should be based on packaging format requirements, tolerance specifications, automotive qualification necessity, and inventory availability.

Frequently Asked Questions (FAQ)

Q: Can SML4751-E3/61 be used as a direct replacement for SML4751HE3_A/I?

A: SML4751-E3/61 is electrically equivalent with identical zener voltage (30 V), power rating (1 W), impedance (40 Ohms), and package (DO-214AC/SMA). Both parts have ±10% tolerance and are supplied in Tape & Reel format. The primary difference is that SML4751-E3/61 does not carry automotive-grade or AEC-Q101 qualification. It is suitable for non-automotive applications or where automotive certification is not required.

Q: What is the difference between SML4751A-E3/61 and SML4751HE3_A/I?

A: SML4751A-E3/61 has tighter tolerance (±5% versus ±10%) and is supplied in Cut Tape (CT) and Digi-Reel® packaging rather than Tape & Reel. All other electrical parameters are identical. SML4751A-E3/61 does not carry automotive-grade or AEC-Q101 qualification. The tighter tolerance provides improved voltage regulation accuracy for applications where this is beneficial.

Q: Is SML4751AHE3_A/H suitable for automotive applications?

A: Yes. SML4751AHE3_A/H carries automotive-grade designation and AEC-Q101 qualification, matching the main part SML4751HE3_A/I. It provides tighter tolerance (±5%) and is available in both Cut Tape (CT) / Digi-Reel® and Tape & Reel (TR) packaging formats. This part is fully qualified for automotive circuit applications.

Q: What packaging formats are available across all substitute parts?

A: SML4751HE3_A/I and SML4751-E3/61 are supplied in Tape & Reel (TR) format. SML4751A-E3/61 is supplied in Cut Tape (CT) and Digi-Reel® format. SML4751AHE3_A/H is available in both Cut Tape (CT) / Digi-Reel® and Tape & Reel (TR) formats. Selection should be based on assembly equipment compatibility and procurement requirements.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All substitute parts (SML4751-E3/61, SML4751A-E3/61, and SML4751AHE3_A/H) are RoHS3 compliant, matching the main part SML4751HE3_A/I. All parts have Moisture Sensitivity Level 1 (Unlimited).

Q: Which substitute part has the highest inventory availability?

A: SML4751A-E3/61 has the highest inventory with 5042 pieces in stock, followed by SML4751-E3/61 with 3050 pieces and SML4751AHE3_A/H with 1577 pieces. The main part SML4751HE3_A/I has 1095 pieces available.