P1302SALRP Equivalent & Substitute Parts

Part Overview

The P1302SALRP is a Transient Voltage Suppressor (TVS) thyristor manufactured by Littelfuse, designed for surge protection applications requiring 120V off-state voltage rating and 150A peak pulse current handling. This component operates in the TwinChip™ series and is classified as Active product status. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter range, enabling procurement flexibility and supply chain continuity.

Substiute Parts

P1302SALRP

LittelfuseIn Stock: 987P1302SALRP Datasheet

Current PartRFQ

SMTPA120

STMicroelectronicsIn Stock: 10386SMTPA120 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P1302SALRP with the SMTPA120 is based on equivalence across the following critical parameters:

• Voltage Rating: Both parts maintain 120V off-state voltage and 160V breakover voltage
• Peak Pulse Current (8/20µs): Both rated at 150A, meeting primary surge suppression requirement
• Package Compatibility: Both use DO-214AA (SMB) surface mount package
• Compliance: Both are ROHS3 compliant with REACH Unaffected status
• Product Status: Both are Active products with current manufacturing support

Variations in secondary parameters (Current - Peak Pulse 10/1000µs, Current - Hold, Capacitance, Number of Elements) do not preclude substitution when the primary electrical and mechanical specifications align.

Parameter Comparison

Engineering Selection Recommendations

Selection between P1302SALRP and SMTPA120 is determined by availability, lead time, and cost considerations, as both parts meet the specified electrical and mechanical requirements for 120V TVS thyristor applications in DO-214AA packaging.

Both components maintain Active product status with current manufacturing support and full ROHS3 compliance, ensuring long-term supply chain viability. The SMTPA120 offers higher inventory availability (10,300 pcs vs. 891 pcs), which may influence procurement decisions for high-volume applications.

The difference in element count (2 vs. 1) and secondary current parameters (Ih: 120mA vs. 150mA; 10/1000µs: 45A vs. 50A) does not affect substitution eligibility when the primary surge suppression specification (150A at 8/20µs) is the controlling design requirement.

Frequently Asked Questions (FAQ)

Q: Can SMTPA120 directly replace P1302SALRP in existing designs?

A: Yes. Both parts share identical voltage ratings (120V off-state, 160V breakover), identical peak pulse current rating (150A at 8/20µs), and identical DO-214AA SMB package. No PCB layout or footprint changes are required.

Q: What is the significance of the different element count (2 vs. 1)?

A: The P1302SALRP uses a dual-element (TwinChip™) configuration while SMTPA120 uses a single-element design. Both achieve the specified 150A peak pulse current rating. The element count difference does not affect electrical performance when the primary surge suppression requirement is met.

Q: Are there differences in hold current that affect circuit operation?

A: The P1302SALRP specifies 120mA hold current while SMTPA120 specifies 150mA. Both values are within acceptable ranges for TVS thyristor applications. The higher hold current of SMTPA120 provides additional margin in latching behavior.

Q: Do both parts meet the same compliance standards?

A: Yes. Both P1302SALRP and SMTPA120 are ROHS3 compliant, REACH Unaffected, and classified as Moisture Sensitivity Level 1 (Unlimited). Both carry EAR99 ECCN classification and identical HTSUS codes.

Q: Which part should be selected for new designs?

A: Selection is based on procurement factors. SMTPA120 offers significantly higher inventory availability and is suitable for applications where supply chain flexibility is prioritized. P1302SALRP remains appropriate for designs already qualified to the Littelfuse TwinChip™ series.