P4SMA8.2CA Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The P4SMA8.2CA is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection in surface-mount applications. This component operates with a reverse standoff voltage of 7.02V and provides clamping at 12.1V with peak pulse current handling of 33.9A. The part is Active status and widely stocked (23,950 pcs available). Substitute parts are identified based on matching electrical performance parameters, package compatibility, and thermal operating ranges within the DO-214AC (SMA) form factor.

Substiute Parts

P4SMA8.2CA

Littelfuse Inc.In Stock: 24034P4SMA8.2CA Datasheet

Current PartRFQ

SMAJ6.0CA

Good-Ark SemiconductorIn Stock: 55479SMAJ6.0CA Datasheet

MFR RecommendedRFQ

SMAJ6.5CA

MDDIn Stock: 7328SMAJ6.5CA Datasheet

MFR RecommendedRFQ

SMAJ7.0CA

MDDIn Stock: 10183SMAJ7.0CA Datasheet

MFR RecommendedRFQ

SMAJ7.0CA-13-F

Diodes IncorporatedIn Stock: 104190SMAJ7.0CA-13-F Datasheet

MFR RecommendedRFQ

SMAJ7.0CA-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 55736SMAJ7.0CA-E3/61 Datasheet

MFR RecommendedRFQ

SMAJ7.0CA-TP

Micro Commercial CoIn Stock: 7322SMAJ7.0CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4SMA8.2CA are grouped based on electrical parameter compatibility within the TVS diode category. The primary substitution criteria are:

• Package Compatibility: All substitutes use DO-214AC (SMA) surface-mount package
• Voltage Range: Reverse standoff voltage between 6.0V and 7.0V; clamping voltage between 10.3V and 12.1V
• Current Handling: Peak pulse current between 33.3A and 38.8A at 10/1000µs pulse width
• Power Dissipation: 400W peak pulse power rating
• Thermal Performance: Operating temperature range minimum of -50°C to -65°C lower bound; maximum of 150°C or higher
• Compliance: ROHS3 compliant, MSL 1 (Unlimited), REACH Unaffected

Substitutes are organized into two functional groups: direct electrical equivalents (matching 7V standoff voltage) and near-equivalent alternatives (6.0V to 6.5V standoff voltage) that provide comparable transient protection within acceptable voltage tolerance bands.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance with MSL 1 (Unlimited) moisture sensitivity rating, ensuring long-term availability and environmental regulatory alignment with the P4SMA8.2CA.

Direct Electrical Equivalents (7.0V Standoff Voltage): SMAJ7.0CA, SMAJ7.0CA-13-F, SMAJ7.0CA-E3/61, and SMAJ7.0CA-TP provide the closest electrical match to the P4SMA8.2CA with 7.0V reverse standoff voltage and 12.0V clamping voltage. These parts are suitable for applications requiring voltage protection characteristics identical to the original specification. SMAJ7.0CA-E3/61 (Vishay) and SMAJ7.0CA-TP (Micro Commercial Co) support extended temperature ranges (-55°C minimum and -55°C to 175°C respectively), offering enhanced thermal performance for demanding environments.

Near-Equivalent Alternatives (6.0V to 6.5V Standoff Voltage): SMAJ6.0CA and SMAJ6.5CA provide lower reverse standoff voltages (6.0V and 6.5V respectively) with correspondingly lower clamping voltages (10.3V and 11.2V). These parts are suitable for applications where lower voltage thresholds are acceptable or preferred. SMAJ6.0CA offers the highest peak pulse current capability (38.8A) among all substitutes.

Frequently Asked Questions (FAQ)

Q: Can SMAJ6.0CA or SMAJ6.5CA be used as direct replacements for P4SMA8.2CA?

A: SMAJ6.0CA and SMAJ6.5CA are functional substitutes within the TVS diode category but operate at lower voltage thresholds. SMAJ6.0CA triggers at 6.0V standoff (versus 7.02V for P4SMA8.2CA) and clamps at 10.3V (versus 12.1V). SMAJ6.5CA triggers at 6.5V and clamps at 11.2V. These parts are suitable only for applications where lower protection thresholds are acceptable. Verify circuit voltage requirements before selection.

Q: Are all substitute parts pin-compatible with P4SMA8.2CA?

A: Yes. All substitute parts use the DO-214AC (SMA) surface-mount package with identical pin configuration and footprint. No PCB layout modifications are required for mechanical compatibility.

Q: What is the difference between SMAJ7.0CA variants (standard, -13-F, -E3/61, -TP)?

A: All SMAJ7.0CA variants share identical electrical specifications (7.0V standoff, 12.0V clamping, 33.3A peak pulse current, 400W power). Differences exist in manufacturer (MDD, Diodes Incorporated, Vishay, Micro Commercial Co), operating temperature ranges, and packaging designations. SMAJ7.0CA-TP supports the widest temperature range (-55°C to 175°C). Select based on thermal requirements and supplier availability.

Q: Does the P4SMA8.2CA have a wider operating temperature range than the substitutes?

A: Yes. P4SMA8.2CA operates from -65°C to 150°C (TJ), providing a 10°C lower minimum temperature bound compared to most substitutes. SMAJ7.0CA-13-F, SMAJ7.0CA-E3/61, and SMAJ7.0CA-TP match or exceed the upper temperature limit. For applications requiring -65°C minimum operation, P4SMA8.2CA is the only option among the listed parts.

Q: Are all parts REACH compliant?

A: Yes. All listed parts carry REACH Unaffected status, indicating compliance with REACH regulations. All parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity, suitable for standard manufacturing and storage conditions.

Q: Which substitute offers the highest peak pulse current capability?

A: SMAJ6.0CA provides the highest peak pulse current at 38.8A (10/1000µs), compared to 33.9A for P4SMA8.2CA. This higher current capacity may provide additional margin in high-transient environments, though all parts maintain 400W peak pulse power dissipation.