1SMA4748 Zener Diode Equivalent & Substitute Parts

Part Overview

The 1SMA4748 is an active-status zener diode manufactured by SMC Diode Solutions, rated for 22 V nominal zener voltage with 1 W maximum power dissipation. This surface mount component in SMA (DO-214AC) package is designed for voltage regulation and protection applications in electronic circuits. Substitute parts are identified when equivalent electrical parameters and mechanical compatibility are maintained across the specified operating range.

Substiute Parts

1SMA4748

SMC Diode SolutionsIn Stock: 153141SMA4748 Datasheet

Current PartRFQ

SMAJ4748A-TP

Micro Commercial CoIn Stock: 3330SMAJ4748A-TP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1SMA4748 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Zener voltage: 22 V nominal
• Tolerance: ±5%
• Maximum power dissipation: 1 W
• Maximum impedance: 23 Ohms
• Reverse leakage current: 5 µA @ 16.7 V
• Forward voltage: 1.2 V maximum
• Operating temperature range: -65°C to 150°C

Mechanical Equivalence Criteria:

• Package type: DO-214AC (SMA)
• Mounting type: Surface Mount
• Tape & Reel packaging format

The substitute part SMAJ4748A-TP, manufactured by Micro Commercial Co, meets all specified electrical and mechanical parameters for direct substitution in the 1SMA4748 application.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: 1SMA4748 The 1SMA4748 from SMC Diode Solutions is the specified component with active product status and ROHS3 compliance. Current inventory of 15,278 pieces supports immediate procurement.

Substitute Selection: SMAJ4748A-TP The SMAJ4748A-TP from Micro Commercial Co provides full electrical and mechanical equivalence with identical zener voltage, power rating, impedance, and operating temperature specifications. This substitute maintains ROHS3 compliance and MSL Level 1 rating. Inventory availability is 3,313 pieces. This part is suitable for direct replacement in applications where the 1SMA4748 is specified.

Both components are classified as active products with equivalent regulatory compliance status (ROHS3, EAR99 ECCN classification, and identical HTSUS coding).

Frequently Asked Questions (FAQ)

Q: Can SMAJ4748A-TP be used as a direct replacement for 1SMA4748? A: Yes. The SMAJ4748A-TP meets all electrical parameters (22 V zener voltage, ±5% tolerance, 1 W power rating, 23 Ohms maximum impedance) and mechanical specifications (DO-214AC SMA package, surface mount) required for direct substitution.

Q: Are there differences in forward voltage specifications between these parts? A: The 1SMA4748 specifies forward voltage at 200 mA, while SMAJ4748A-TP specifies it at 100 mA. Both maintain the 1.2 V maximum rating. This difference in test current does not affect substitution compatibility.

Q: Do both parts have identical moisture sensitivity ratings? A: Yes. Both the 1SMA4748 and SMAJ4748A-TP are rated MSL Level 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Are the RoHS compliance statuses equivalent? A: Yes. Both parts are ROHS3 compliant. The 1SMA4748 is REACH Affected, while SMAJ4748A-TP is REACH Unaffected. Both meet the same RoHS3 environmental standards.

Q: What is the operating temperature range for both parts? A: Both the 1SMA4748 and SMAJ4748A-TP operate across the identical temperature range of -65°C to 150°C.

Q: Are the package dimensions identical between these zener diodes? A: Both components use the DO-214AC (SMA) package format, ensuring mechanical compatibility in surface mount applications.