1SMA4758 Zener Diode Equivalent & Substitute Parts

Part Overview

The 1SMA4758 is a 56 V, 1 W Zener diode manufactured by SMC Diode Solutions in surface mount SMA (DO-214AC) packaging. This component is designed for voltage regulation and transient protection applications requiring a nominal Zener voltage of 56 V with ±5% tolerance. The part is currently in active production status with 891 pieces available in new original inventory. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, supply chain considerations, or design flexibility within the same functional category.

Substiute Parts

1SMA4758

SMC Diode SolutionsIn Stock: 9821SMA4758 Datasheet

Current PartRFQ

1SMA4758-GT3

SMC Diode SolutionsIn Stock: 1394001SMA4758-GT3 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1SMA4758 are identified based on strict electrical and mechanical parameter equivalence. The substitution criteria are:

Electrical Parameters (Must Match):

• Voltage - Zener (Nom): 56 V
• Tolerance: ±5%
• Power - Max: 1 W
• Impedance (Max): 110 Ohms
• Current - Reverse Leakage @ Vr: 5 µA @ 42.6 V
• Voltage - Forward (Vf) (Max) @ If: 1.2 V @ 200 mA
• Operating Temperature Range: -65°C to 150°C

Mechanical Parameters (Must Match):

• Mounting Type: Surface Mount
• Package / Case: DO-214AC, SMA

Compliance Parameters (Must Match):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes within the Zener diode category.

Parameter Comparison

Engineering Selection Recommendations

The 1SMA4758-GT3 is a direct parametric equivalent to the 1SMA4758. Both parts are manufactured by SMC Diode Solutions and share identical electrical specifications, mechanical packaging, and compliance certifications. Both components are active products with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Selection between these parts is based on availability and supply chain requirements. The 1SMA4758-GT3 maintains significantly higher inventory levels (139,310 pieces) compared to the 1SMA4758 (891 pieces), making it suitable for applications where extended lead times or supply continuity is a consideration. No electrical or mechanical redesign is required when substituting between these parts.

Frequently Asked Questions (FAQ)

Q: Can the 1SMA4758-GT3 be used as a direct replacement for the 1SMA4758?

A: Yes. The 1SMA4758-GT3 is a parametric equivalent with identical electrical specifications, including 56 V nominal Zener voltage, 1 W maximum power dissipation, ±5% tolerance, and identical forward voltage characteristics. Both parts use the same DO-214AC (SMA) surface mount package and share identical compliance certifications.

Q: Are there any differences in the physical package between these parts?

A: No. Both the 1SMA4758 and 1SMA4758-GT3 use the DO-214AC surface mount package, commonly referred to as SMA. They are mechanically interchangeable on printed circuit boards designed for this package type.

Q: What is the operating temperature range for these Zener diodes?

A: Both parts operate across the temperature range of -65°C to 150°C, providing consistent Zener voltage regulation and leakage characteristics throughout this range.

Q: Do both parts meet RoHS compliance requirements?

A: Yes. Both the 1SMA4758 and 1SMA4758-GT3 are ROHS3 compliant and carry an unlimited moisture sensitivity level (MSL 1), suitable for standard PCB assembly and storage conditions.

Q: What is the maximum reverse leakage current specification?

A: Both parts specify a maximum reverse leakage current of 5 µA measured at 42.6 V, ensuring low standby current consumption in voltage regulation applications.

Q: Can these parts be used interchangeably in high-frequency applications?

A: The impedance specification of 110 Ohms (Max) applies to both parts. Application suitability depends on circuit design requirements and frequency of operation, which are determined by the specific application circuit topology.