NP1300SAMCT3G Equivalent & Substitute Parts

Part Overview

The NP1300SAMCT3G is a 120V off-state, 150A peak pulse (8/20µs) TVS thyristor manufactured by onsemi in DO-214AA (SMB) surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part functions as a transient voltage suppressor for circuit protection applications requiring thyristor-based clamping at 120V breakover voltage.

Substiute Parts

NP1300SAMCT3G

onsemiIn Stock: 764NP1300SAMCT3G Datasheet

Current PartRFQ

SMTPA120

STMicroelectronicsIn Stock: 10386SMTPA120 Datasheet

DirectRFQ

P1300SCMCLRP

Littelfuse Inc.In Stock: 1705P1300SCMCLRP Datasheet

SimilarRFQ

TB1300M-13

Diodes IncorporatedIn Stock: 749TB1300M-13 Datasheet

SimilarRFQ

TB1300M-13-F

Diodes IncorporatedIn Stock: 4287TB1300M-13-F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the NP1300SAMCT3G is determined by the following critical parameters:

• Voltage - Breakover: 160V (fixed requirement)
• Voltage - Off State: 120V (fixed requirement)
• Current - Hold (Ih): 150mA (fixed requirement)
• Package / Case: DO-214AA, SMB (fixed requirement)
• Mounting Type: Surface Mount (fixed requirement)

Substitute parts are grouped into two categories based on current handling capacity:

Direct Equivalent (150A class): Parts matching the 150A peak pulse (8/20µs) specification of the original component.

Higher Current Capacity (250A–400A class): Parts exceeding the original 150A specification, suitable for applications requiring enhanced transient suppression capability while maintaining identical voltage parameters and package form factor.

Parameter Comparison

Engineering Selection Recommendations

SMTPA120 (STMicroelectronics) is the direct equivalent replacement for NP1300SAMCT3G. It maintains identical voltage specifications (160V breakover, 120V off-state) and current ratings (150A peak pulse at 8/20µs, 50A at 10/1000µs). The part is active in production, ROHS3 compliant, and available in high inventory (10,300 pcs). Capacitance is slightly elevated at 30pF versus 23pF, which is acceptable for most transient suppression applications.

TB1300M-13-F (Diodes Incorporated) provides a higher current capacity option at 250A peak pulse (8/20µs) while maintaining all voltage parameters. This part is active, ROHS3 compliant, and offers increased transient handling margin. Capacitance is 90pF, which may affect high-frequency circuit behavior.

P1300SCMCLRP (Littelfuse) offers the highest current capacity at 400A peak pulse (8/20µs). This part is active and ROHS3 compliant but introduces the largest capacitance deviation at 60pF and elevated on-state voltage at 5V. Selection of this part should be based on application requirements for enhanced current suppression capability.

Frequently Asked Questions (FAQ)

Q: Can SMTPA120 directly replace NP1300SAMCT3G in existing designs?

A: Yes. SMTPA120 maintains identical voltage specifications and current ratings. The 7pF capacitance increase (30pF vs. 23pF) is within acceptable tolerance for most transient suppression circuits. No design modifications are required.

Q: What is the difference between the substitute parts in terms of current handling?

A: NP1300SAMCT3G and SMTPA120 both handle 150A peak pulse (8/20µs). TB1300M-13-F handles 250A, and P1300SCMCLRP handles 400A. Higher current ratings provide greater transient suppression margin but increase capacitance, which may affect circuit performance at higher frequencies.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use DO-214AA (SMB) surface mount package, ensuring mechanical and thermal compatibility with existing PCB layouts.

Q: Which substitute part should I select for new designs?

A: SMTPA120 is recommended for direct replacement applications. It is active in production, ROHS3 compliant, and offers the closest electrical match to the original part. Higher current alternatives (TB1300M-13-F or P1300SCMCLRP) should be selected only if application requirements demand increased transient suppression capability.

Q: What is the impact of capacitance differences among substitute parts?

A: Capacitance variations (23pF to 90pF) affect high-frequency circuit behavior and signal integrity. SMTPA120 (30pF) introduces minimal deviation. TB1300M-13-F (90pF) and P1300SCMCLRP (60pF) may require circuit validation in applications with strict frequency response requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. SMTPA120, TB1300M-13-F, and P1300SCMCLRP are all ROHS3 compliant. The original NP1300SAMCT3G compliance status is not specified.