SMA5C24-TP Equivalent & Substitute Parts

Part Overview

The SMA5C24-TP is a Zener diode rated at 24 V nominal voltage with 3 W maximum power dissipation in a surface mount DO-214AC (SMA) package. Manufactured by Micro Commercial Co, this component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications. The substitute part identified maintains the same core electrical specifications while offering improved availability and active product status.

Substiute Parts

SMA5C24-TP

Micro Commercial CoIn Stock: 968SMA5C24-TP Datasheet

Current PartRFQ

3SMAJ5934B-TP

Micro Commercial CoIn Stock: 23323SMAJ5934B-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMA5C24-TP with the 3SMAJ5934B-TP is based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Zener voltage: 24 V nominal (both parts)
• Maximum power dissipation: 3 W (both parts)
• Package type: DO-214AC, SMA surface mount (both parts)
• RoHS3 compliance: Both parts meet ROHS3 requirements
• Moisture sensitivity: MSL 1 (Unlimited) for both parts

Tolerance Consideration: The SMA5C24-TP specifies ±5.83% tolerance, while the 3SMAJ5934B-TP specifies ±5% tolerance. The tighter tolerance of the substitute part ensures compatibility within the original part's tolerance band.

Product Status: The substitute part 3SMAJ5934B-TP carries active product status with significantly higher inventory availability (2300 Pcs), compared to the obsolete SMA5C24-TP (870 Pcs).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 3SMAJ5934B-TP

The 3SMAJ5934B-TP is the direct substitute for the obsolete SMA5C24-TP. Selection of this part is supported by the following factors:

1. Electrical Equivalence: Both parts maintain identical 24 V nominal Zener voltage and 3 W maximum power rating, ensuring functional compatibility in circuit applications.

2. Package Compatibility: Identical DO-214AC (SMA) surface mount package enables direct PCB layout compatibility without design modification.

3. Compliance Alignment: Both parts meet ROHS3 requirements and carry MSL 1 (Unlimited) moisture sensitivity classification, maintaining environmental and handling compliance standards.

4. Product Status: The substitute part carries active product status with confirmed inventory availability, eliminating supply chain risk associated with the obsolete main part.

5. Tolerance Specification: The substitute part's ±5% tolerance is tighter than the main part's ±5.83% tolerance, ensuring performance within the original specification band.

Operating Temperature Consideration: The substitute part specifies a minimum operating temperature of -55°C compared to the main part's -65°C. Applications requiring operation below -55°C require verification against actual circuit thermal requirements.

Frequently Asked Questions (FAQ)

Q: Can the 3SMAJ5934B-TP be used as a direct replacement for the SMA5C24-TP in existing designs?

A: Yes. Both parts share identical 24 V Zener voltage, 3 W power rating, and DO-214AC surface mount package. PCB layout and circuit connections require no modification. The substitute part's tighter tolerance (±5%) provides improved voltage regulation compared to the original part's ±5.83% tolerance.

Q: What is the difference in impedance between these parts?

A: The SMA5C24-TP specifies 25 Ohms maximum impedance, while the 3SMAJ5934B-TP specifies 19 Ohms maximum impedance. Lower impedance in the substitute part results in improved transient response and voltage regulation characteristics.

Q: Are there any temperature range limitations when substituting?

A: The substitute part 3SMAJ5934B-TP specifies a minimum operating temperature of -55°C, compared to the main part's -65°C minimum. For applications requiring operation below -55°C, the substitute part's thermal performance must be evaluated against specific circuit requirements.

Q: Do both parts have identical forward voltage characteristics?

A: No. The SMA5C24-TP specifies 1.2 V maximum forward voltage at 200 mA, while the 3SMAJ5934B-TP specifies 1.5 V maximum forward voltage at the same current. This difference is within acceptable limits for Zener diode applications and does not affect substitution compatibility.

Q: What is the reverse leakage current difference?

A: The SMA5C24-TP specifies 500 nA reverse leakage at 18 V, while the 3SMAJ5934B-TP specifies 1 µA reverse leakage at 18.2 V. Both values are within acceptable limits for Zener diode operation and do not impact circuit functionality.

Q: Are packaging and moisture sensitivity identical?

A: Yes. Both parts use DO-214AC (SMA) surface mount packaging and carry MSL 1 (Unlimited) moisture sensitivity classification. Handling, storage, and assembly processes require no modification.

Q: Why is the substitute part listed as active status?

A: The 3SMAJ5934B-TP carries active product status with confirmed ongoing manufacturing and distribution, ensuring long-term component availability. The original SMA5C24-TP is classified as obsolete, indicating discontinued production and limited remaining inventory.