P4SMA8.2A Equivalent & Substitute Parts

Part Overview

The P4SMA8.2A is an active Littelfuse Inc. transient voltage suppressor (TVS) diode in DO-214AC (SMA) surface mount package. This unidirectional zener diode is designed for general-purpose transient voltage suppression applications with a 7.02V reverse standoff voltage and 12.1V maximum clamping voltage. The part is RoHS3 compliant and carries unlimited moisture sensitivity level (MSL 1), making it suitable for standard manufacturing environments. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, manufacturing discontinuation, or design flexibility needs.

Substiute Parts

P4SMA8.2A

Littelfuse Inc.In Stock: 300112P4SMA8.2A Datasheet

Current PartRFQ

SMAJ6.0A

MDDIn Stock: 20420SMAJ6.0A Datasheet

MFR RecommendedRFQ

SMAJ6.5A

MDDIn Stock: 8265SMAJ6.5A Datasheet

MFR RecommendedRFQ

SMAJ7.0A

MDDIn Stock: 105278SMAJ7.0A Datasheet

MFR RecommendedRFQ

SMAJ7.0A-13-F

Diodes IncorporatedIn Stock: 15430SMAJ7.0A-13-F Datasheet

MFR RecommendedRFQ

SMAJ7.0A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 12141SMAJ7.0A-E3/61 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P4SMA8.2A is determined by the following critical parameters:

• Package Compatibility: All substitute parts must use DO-214AC (SMA) surface mount package to ensure PCB footprint and assembly process compatibility.
• Voltage Rating Range: Reverse standoff voltage must fall within the acceptable operating range for the application circuit. Substitute parts with standoff voltages between 6.0V and 7.0V provide functional equivalence with minor voltage characteristic variations.
• Peak Pulse Current: Minimum peak pulse current rating of 33.3A ensures adequate transient suppression capability.
• Power Dissipation: All qualified substitutes maintain 400W peak pulse power rating.
• Temperature Operating Range: Minimum operating temperature of -50°C is acceptable for most industrial applications; the P4SMA8.2A extends to -65°C.
• Compliance & Certifications: RoHS3 compliance and MSL 1 rating are mandatory for manufacturing compatibility.

Four substitute parts meet these criteria with voltage standoff ratings of 6.0V, 6.5V, and 7.0V, representing a controlled voltage tolerance band around the primary part's 7.02V specification.

Parameter Comparison

Engineering Selection Recommendations

All five substitute parts maintain active product status and full RoHS3 compliance with MSL 1 rating, ensuring manufacturing process compatibility with the P4SMA8.2A.

SMAJ7.0A (MDD) and SMAJ7.0A-13-F (Diodes Incorporated) provide the closest electrical match with 7.0V reverse standoff voltage, 12.0V clamping voltage, and 33.3A peak pulse current. These parts are functionally equivalent to the primary part within normal circuit tolerance bands.

SMAJ7.0A-E3/61 (Vishay) offers identical electrical specifications to the SMAJ7.0A variants with extended temperature range to -55°C and is supplied under the TransZorb® series designation.

SMAJ6.5A (MDD) provides a mid-range voltage option at 6.5V standoff with 11.2V clamping voltage and 35.7A peak pulse current, suitable for applications with lower voltage thresholds.

SMAJ6.0A (MDD) operates at 6.0V standoff with 10.3V clamping voltage and the highest peak pulse current rating of 38.8A, appropriate for circuits requiring lower voltage suppression thresholds.

Temperature range consideration: The P4SMA8.2A extends to -65°C; substitute parts from MDD are rated to -50°C minimum, while Diodes Incorporated and Vishay variants reach -55°C.

Frequently Asked Questions (FAQ)

Q: Can SMAJ6.0A or SMAJ6.5A be used in place of P4SMA8.2A?

A: These parts are mechanically compatible (DO-214AC/SMA package) and electrically functional as TVS diodes. However, their lower reverse standoff voltages (6.0V and 6.5V versus 7.02V) result in earlier clamping action. Use only if the application circuit tolerates lower voltage thresholds.

Q: What is the difference between SMAJ7.0A from different manufacturers?

A: MDD, Diodes Incorporated (SMAJ7.0A-13-F), and Vishay (SMAJ7.0A-E3/61) all provide 7.0V standoff voltage with identical electrical performance. Differences exist in minimum operating temperature (-50°C for MDD versus -55°C for Diodes and Vishay) and packaging format (Tape & Reel versus Cut Tape & Digi-Reel).

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance and MSL 1 (unlimited) moisture sensitivity level, matching the primary P4SMA8.2A specifications.

Q: Does package compatibility guarantee direct substitution?

A: Package compatibility (DO-214AC/SMA) ensures PCB footprint and assembly process alignment. Electrical parameter differences, particularly reverse standoff voltage and clamping voltage, must be evaluated against circuit requirements before substitution.

Q: Which substitute offers the best temperature range coverage?

A: SMAJ7.0A-13-F (Diodes Incorporated) and SMAJ7.0A-E3/61 (Vishay) both extend to -55°C minimum operating temperature, compared to -50°C for MDD variants. The primary P4SMA8.2A reaches -65°C for extended low-temperature applications.