TISP4150F3LM Equivalent & Substitute Parts

Part Overview

The TISP4150F3LM is a 120V off-state thyristor transient voltage suppressor manufactured by Bourns Inc., designed for surge protection applications requiring peak pulse current handling of 120 A at 8/20µs pulse width. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The part is packaged in TO-226-2 (TO-92-2) configuration for through-hole mounting applications.

Substiute Parts

TISP4150F3LM

Bourns Inc.In Stock: 1239TISP4150F3LM Datasheet

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P1300EAL

Littelfuse Inc.In Stock: 20403P1300EAL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TISP4150F3LM is determined by the following critical parameters:

• Voltage Rating Match: Off-state voltage must be 120V; breakover voltage tolerance within specified range
• Current Handling Capability: Peak pulse current (8/20µs) must meet or exceed 120A requirement
• Package Compatibility: TO-226-2 or TO-92-2 through-hole configuration required for mechanical and electrical fit
• Hold Current: Must maintain 150mA hold current specification
• Single Element Configuration: One-element thyristor design

The P1300EAL from Littelfuse Inc. meets these substitution criteria with compatible voltage ratings, superior current handling (150A peak pulse), matching package configuration, and identical hold current specification.

Parameter Comparison

Engineering Selection Recommendations

The P1300EAL is a qualified substitute for the obsolete TISP4150F3LM based on the following engineering criteria:

Voltage Compatibility: Both devices maintain 120V off-state voltage specification. The P1300EAL breakover voltage of 160V versus 150V represents a 10V increase, which remains within acceptable thyristor design tolerances for surge protection applications.

Current Performance: The P1300EAL provides 150A peak pulse current (8/20µs), exceeding the TISP4150F3LM requirement of 120A. This enhanced capability provides additional margin for transient suppression without compromising circuit protection.

Package and Mounting: Identical TO-226-2 and TO-92-2 through-hole packaging ensures direct mechanical and electrical compatibility without PCB redesign.

Compliance Status: The P1300EAL holds active product status with ROHS3 compliance, addressing regulatory requirements for new production. The TISP4150F3LM obsolete status necessitates transition to an actively manufactured equivalent.

Hold Current Specification: Both devices maintain identical 150mA hold current, ensuring consistent circuit behavior during transient suppression events.

Frequently Asked Questions (FAQ)

Q: Can the P1300EAL directly replace the TISP4150F3LM without circuit modification?

A: Yes. Both devices share identical off-state voltage (120V), hold current (150mA), and TO-226-2/TO-92-2 package configuration. The P1300EAL's higher peak pulse current (150A vs. 120A) and slightly elevated breakover voltage (160V vs. 150V) are compatible with applications designed for the TISP4150F3LM.

Q: What is the significance of the 10V breakover voltage difference?

A: The P1300EAL breakover voltage of 160V versus the TISP4150F3LM's 150V represents a 6.7% increase. This difference remains within normal thyristor design variation and does not affect substitution validity for surge protection circuits.

Q: Are there packaging considerations for through-hole mounting?

A: Both the TISP4150F3LM and P1300EAL use identical TO-226-2 and TO-92-2 through-hole packages. No PCB layout or mounting modifications are required for substitution.

Q: Why is the P1300EAL rated for higher peak pulse current?

A: The P1300EAL (150A) provides enhanced current handling compared to the TISP4150F3LM (120A). This represents improved device design and manufacturing capability from Littelfuse, offering additional transient suppression margin without introducing compatibility issues.

Q: What compliance advantages does the P1300EAL offer?

A: The P1300EAL is ROHS3 compliant and maintains active product status, ensuring long-term availability and regulatory compliance for new designs. The TISP4150F3LM's obsolete status and RoHS non-compliance make the P1300EAL the appropriate choice for current production.