SMA5C12-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The SMA5C12-TP is a 12 V, 3 W Zener diode manufactured by Micro Commercial Co in the DO-214AC (SMA) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement needs. The substitute part identified maintains the same nominal voltage rating, power dissipation capability, and package form factor while offering improved availability through active product status.

Substiute Parts

SMA5C12-TP

Micro Commercial CoIn Stock: 1086SMA5C12-TP Datasheet

Current PartRFQ

3SMAJ5927B-TP

Micro Commercial CoIn Stock: 20023SMAJ5927B-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMA5C12-TP with the 3SMAJ5927B-TP is based on the following critical parameters that must remain constant or within acceptable tolerances:

Primary Matching Criteria:

• Nominal Zener voltage: 12 V (both parts)
• Maximum power dissipation: 3 W (both parts)
• Package form factor: DO-214AC (SMA) surface mount (both parts)
• RoHS3 compliance: Both parts meet this requirement
• Moisture sensitivity level: MSL 1 (Unlimited) for both parts

Secondary Compatibility Factors:

• Operating temperature range compatibility
• Voltage tolerance specifications
• Forward voltage characteristics
• Reverse leakage current specifications

The 3SMAJ5927B-TP is an active product offering superior availability compared to the obsolete SMA5C12-TP while maintaining electrical and mechanical compatibility within the specified parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

The 3SMAJ5927B-TP is a direct substitute for the SMA5C12-TP based on the following engineering criteria:

Compliance and Regulatory Status: Both parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage protocols. The substitute part maintains REACH Unaffected status, providing additional regulatory assurance.

Product Availability: The SMA5C12-TP is classified as obsolete, creating supply chain risk. The 3SMAJ5927B-TP is an active product with 1990 pieces in stock, providing reliable procurement for current and future production requirements.

Electrical Compatibility: Both parts share identical nominal Zener voltage (12 V) and maximum power dissipation (3 W). The substitute exhibits tighter voltage tolerance (±5% versus ±5.42%), lower impedance (6.5 Ohms versus 9 Ohms), and improved reverse leakage characteristics (1 µA versus 500 nA at 9.1 V). These differences represent performance improvements rather than incompatibilities.

Mechanical and Thermal Compatibility: Both parts utilize the DO-214AC (SMA) surface mount package, ensuring identical PCB footprint and assembly compatibility. The substitute part operates across a slightly narrower temperature range (-55°C to 150°C versus -65°C to 150°C), which remains suitable for standard industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can the 3SMAJ5927B-TP directly replace the SMA5C12-TP in existing designs?

A: Yes. Both parts share the same nominal Zener voltage (12 V), maximum power rating (3 W), and DO-214AC (SMA) package form factor. The substitute part is electrically and mechanically compatible for direct substitution.

Q: What are the differences in electrical performance between these parts?

A: The 3SMAJ5927B-TP exhibits tighter voltage tolerance (±5% versus ±5.42%), lower impedance (6.5 Ohms versus 9 Ohms), and lower reverse leakage current (1 µA versus 500 nA at 9.1 V). These represent performance improvements. The forward voltage at 200 mA is slightly higher (1.5 V versus 1.2 V), which may require circuit evaluation in forward-biased applications.

Q: Are there package or mounting differences?

A: No. Both parts use the DO-214AC (SMA) surface mount package. PCB footprints, reflow profiles, and assembly processes remain identical.

Q: Does the operating temperature range difference affect compatibility?

A: The substitute part operates from -55°C to 150°C compared to -65°C to 150°C for the main part. For applications requiring operation below -55°C, the original part specification must be maintained. For standard industrial and commercial temperature ranges, the substitute is fully compatible.

Q: What is the significance of the product status change from obsolete to active?

A: The obsolete status of the SMA5C12-TP indicates discontinued manufacturing and limited availability. The active status of the 3SMAJ5927B-TP ensures ongoing production, reliable procurement, and long-term supply chain stability.

Q: Are both parts RoHS compliant?

A: Yes. Both the SMA5C12-TP and 3SMAJ5927B-TP are ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and use.