P4SMA160 Equivalent & Substitute Parts Reference

Part Overview

The P4SMA160 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 136V reverse standoff voltage with a 229.95V maximum clamping voltage and 1.9A peak pulse current capability in a surface-mount DO-214AC (SMA) package.

The P4SMA160 is classified as obsolete, which necessitates identification of active equivalent alternatives that maintain electrical and mechanical compatibility. Substitute parts must preserve the core electrical characteristics—reverse standoff voltage, clamping voltage, peak pulse current, and power dissipation—while meeting current manufacturing and compliance standards.

Substiute Parts

P4SMA160

Littelfuse Inc.In Stock: 691P4SMA160 Datasheet

Current PartRFQ

P4SMA160A

Eaton - Electronics DivisionIn Stock: 26328P4SMA160A Datasheet

MFR RecommendedRFQ

P4SMA160A

Eaton - Electronics DivisionIn Stock: 26328P4SMA160A Datasheet

MFR RecommendedRFQ

SMAJP4KE160A-TP

Micro Commercial CoIn Stock: 1068SMAJP4KE160A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4SMA160 are qualified based on strict electrical and mechanical parameter alignment:

Primary Substitution Criteria:

• Reverse standoff voltage: 136V (exact match required)
• Peak pulse current: 1.9A (exact match required)
• Power dissipation: 400W (exact match required)
• Package type: DO-214AC / SMA (exact match required)
• Mounting type: Surface Mount (exact match required)
• Unidirectional configuration: 1 channel (exact match required)

Secondary Compatibility Parameters:

• Clamping voltage tolerance: 219V to 229.95V (acceptable range for circuit protection function)
• Breakdown voltage: 144.4V to 152V (acceptable range within design margin)
• Operating temperature range: Must support minimum -55°C to 150°C overlap

Both identified substitutes—P4SMA160A (Eaton) and SMAJP4KE160A-TP (Micro Commercial Co)—meet all primary criteria and fall within acceptable secondary parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

P4SMA160A (Eaton - Electronics Division): This part is the manufacturer-recommended substitute and maintains identical electrical specifications to the original P4SMA160. It carries active product status with confirmed RoHS compliance and substantial inventory availability (26,300 pcs). The clamping voltage of 219V is within acceptable tolerance for the 229.95V original specification. Operating temperature range (-55 to 150°C) covers the critical upper and lower bounds of typical industrial applications. Packaging in Tape & Reel format supports automated assembly processes.

SMAJP4KE160A-TP (Micro Commercial Co): This alternative meets all primary electrical and mechanical substitution criteria with identical reverse standoff voltage, peak pulse current, and power dissipation. The extended operating temperature range (-55 to 175°C) provides additional thermal margin for high-temperature environments. Clamping voltage (219V) aligns with the Eaton substitute. Bulk packaging format may require manual handling for assembly operations. REACH compliance status indicates no regulatory restrictions for European applications.

Both substitutes are electrically and mechanically compatible with the P4SMA160. Selection between them depends on supply chain availability, packaging requirements, and application-specific temperature operating conditions.

Frequently Asked Questions (FAQ)

Q: Can P4SMA160A directly replace P4SMA160 in existing designs? A: Yes. The P4SMA160A maintains identical reverse standoff voltage (136V), peak pulse current (1.9A), and power dissipation (400W). The clamping voltage difference (219V vs. 229.95V) remains within acceptable circuit protection tolerance. Package type and mounting configuration are identical (DO-214AC, SMA, surface mount).

Q: What is the significance of the clamping voltage difference between P4SMA160 (229.95V) and its substitutes (219V)? A: Clamping voltage represents the maximum voltage across the TVS diode during transient suppression. The 10.95V difference is within typical design margins for overvoltage protection circuits. Both values ensure the protected circuit remains below maximum rated voltage stress during transient events.

Q: Are there temperature range limitations when substituting P4SMA160 with alternatives? A: The P4SMA160 operates from -65 to 150°C. Both substitutes support -55 to 150°C minimum, which covers standard industrial temperature ranges. For applications requiring operation below -55°C, the original P4SMA160 specification should be verified against actual system requirements. The SMAJP4KE160A-TP extends to 175°C, providing additional margin for high-temperature applications.

Q: Does packaging format affect electrical performance? A: No. Both Tape & Reel (P4SMA160A) and Bulk (SMAJP4KE160A-TP) packaging formats contain identical DO-214AC (SMA) components. Packaging differences affect supply chain logistics and assembly automation compatibility, not electrical characteristics.

Q: Are all substitutes RoHS compliant? A: P4SMA160A carries explicit RoHS compliance certification. SMAJP4KE160A-TP lists REACH Unaffected status, indicating no hazardous substance restrictions under REACH regulations. Both are suitable for applications requiring environmental compliance.

Q: What is the difference between "Voltage - Reverse Standoff" and "Voltage - Breakdown"? A: Reverse standoff voltage (136V) is the maximum voltage the TVS diode blocks without conducting. Breakdown voltage (144.4V to 152V) is the threshold at which the diode begins conducting to suppress transients. The difference provides a safety margin for circuit operation.