1SMA4759 Zener Diode Equivalent & Substitute Parts

Part Overview

The 1SMA4759 is a 62 V, 1 W surface mount zener diode manufactured by SMC Diode Solutions in the DO-214AC (SMA) package. This component is designed for voltage regulation and protection applications requiring a nominal zener voltage of 62 V with ±5% tolerance. The part is currently active in production with 2247 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring identical electrical and mechanical specifications.

Substiute Parts

1SMA4759

SMC Diode SolutionsIn Stock: 22981SMA4759 Datasheet

Current PartRFQ

SML4759-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 2667SML4759-E3/61 Datasheet

Parametric EquivalentRFQ

SML4759A-E3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 2984SML4759A-E3/5A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1SMA4759 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Parameters:

• Voltage - Zener (Nominal): 62 V
• Tolerance: ±5%
• Power - Maximum: 1 W
• Impedance (Maximum): 125 Ohms
• Current - Reverse Leakage @ Vr: 5 µA @ 47.1 V
• Operating Temperature Range: -65°C to 150°C

Mechanical Parameters:

• Mounting Type: Surface Mount
• Package / Case: DO-214AC (SMA)
• Moisture Sensitivity Level: 1 (Unlimited)

All identified substitute parts meet these specifications without deviation. Substitutes are sourced from Vishay General Semiconductor - Diodes Division and maintain identical electrical performance and physical form factor compatibility with the original 1SMA4759.

Parameter Comparison

Engineering Selection Recommendations

All three parts—1SMA4759, SML4759-E3/61, and SML4759A-E3/5A—are active products with identical electrical specifications and mechanical compatibility. Selection between these parts is based on the following factors:

Packaging Format:

• 1SMA4759 and SML4759-E3/61 are supplied in Tape & Reel (TR) format, suitable for high-volume automated assembly operations.
• SML4759A-E3/5A is supplied in Cut Tape (CT) & Digi-Reel® format, providing flexibility for lower-volume or mixed-component procurement.

Regulatory Compliance:

• All parts are ROHS3 compliant and classified under ECCN EAR99.
• 1SMA4759 carries REACH Affected status; SML4759-E3/61 and SML4759A-E3/5A carry REACH Unaffected status.
• Selection should account for supply chain regulatory requirements specific to the end application and destination market.

Inventory Availability:

• 1SMA4759: 2247 units in stock
• SML4759-E3/61: 2593 units in stock
• SML4759A-E3/5A: 2932 units in stock

Frequently Asked Questions (FAQ)

Q: Can SML4759-E3/61 or SML4759A-E3/5A be used as direct replacements for 1SMA4759?

A: Yes. Both Vishay parts meet all electrical and mechanical specifications of the 1SMA4759. They share identical zener voltage (62 V), tolerance (±5%), power rating (1 W), impedance (125 Ohms), reverse leakage current (5 µA @ 47.1 V), operating temperature range (-65°C to 150°C), and package format (DO-214AC/SMA). Direct substitution is supported without circuit modification.

Q: What is the difference between SML4759-E3/61 and SML4759A-E3/5A?

A: The primary difference is packaging format. SML4759-E3/61 is supplied in Tape & Reel (TR) format, while SML4759A-E3/5A is supplied in Cut Tape (CT) & Digi-Reel® format. Both parts are electrically identical and mechanically compatible. Packaging selection depends on assembly process requirements and order volume.

Q: Are there any compliance differences between the main part and substitutes?

A: All parts are ROHS3 compliant and carry EAR99 classification. The 1SMA4759 is REACH Affected, while both Vishay substitutes (SML4759-E3/61 and SML4759A-E3/5A) are REACH Unaffected. Applications subject to REACH regulations may benefit from selecting the Vishay alternatives.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes. All three parts use the same DO-214AC (SMA) surface mount package with identical footprint and land pattern requirements. No PCB layout modifications are necessary when substituting between these parts.

Q: What is the moisture sensitivity level for these parts?

A: All three parts carry Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control requirements. Standard storage conditions are suitable for all parts.

Q: Which part should be selected for new designs?

A: For new designs, either Vishay part (SML4759-E3/61 or SML4759A-E3/5A) is recommended based on packaging requirements and supply chain considerations. Both offer REACH Unaffected status and equivalent electrical performance. Packaging format selection should align with manufacturing process capabilities.