TISP4072F3LM Equivalent & Substitute Parts

Part Overview

The TISP4072F3LM is a 58V off-state thyristor transient voltage suppressor manufactured by Bourns Inc., designed for surge protection applications requiring 120A peak pulse current capability in a TO-226-2 package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates with a 72V breakover voltage and 3V on-state voltage, providing reliable transient suppression in through-hole mounting configurations.

Substiute Parts

TISP4072F3LM

Bourns Inc.In Stock: 1190TISP4072F3LM Datasheet

Current PartRFQ

P0640EAL

LittelfuseIn Stock: 20354P0640EAL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TISP4072F3LM is determined by the following critical parameters:

• Off-State Voltage (58V): Must match exactly to maintain circuit protection thresholds
• Breakover Voltage (72V): Acceptable variance within application-specific surge protection requirements
• On-State Voltage (3V): Determines forward voltage drop during transient suppression
• Peak Pulse Current (8/20µs, 120A): Minimum current handling capability for surge events
• Package Configuration (TO-226-2): Physical and electrical compatibility with existing PCB layouts
• Mounting Type (Through Hole): Mechanical compatibility with board assembly processes

The P0640EAL from Littelfuse meets these substitution criteria with compatible electrical characteristics and identical package specifications.

Parameter Comparison

Engineering Selection Recommendations

The P0640EAL represents a direct functional substitute for the TISP4072F3LM based on matching off-state voltage, identical package configuration, and through-hole mounting compatibility. The substitute part offers superior current handling (150A vs. 120A peak pulse), enhanced product status as an active component, and ROHS3 compliance, eliminating regulatory constraints associated with the obsolete TISP4072F3LM. The slightly elevated breakover voltage (77V vs. 72V) and on-state voltage (4V vs. 3V) remain within acceptable operating margins for transient suppression applications. Both components share identical hold current specifications and comparable capacitance characteristics, ensuring functional equivalence in circuit protection roles.

Frequently Asked Questions (FAQ)

Q: Can the P0640EAL directly replace the TISP4072F3LM in existing designs?

A: Yes. Both components share identical off-state voltage (58V), package configuration (TO-226-2), and mounting type (through hole). The P0640EAL provides equal or superior electrical performance with higher peak pulse current capability.

Q: What is the significance of the breakover voltage difference (72V vs. 77V)?

A: The breakover voltage determines the threshold at which the thyristor enters conduction during transient events. The 5V difference between parts reflects manufacturer-specific design variations. Circuit validation should confirm this variance is acceptable for the intended application.

Q: Does the on-state voltage difference (3V vs. 4V) affect circuit performance?

A: The on-state voltage represents forward voltage drop during active transient suppression. The 1V difference is minor and typically acceptable in surge protection circuits. Application-specific thermal and power dissipation analysis may be required for critical designs.

Q: Why is the P0640EAL rated for higher peak pulse current (150A vs. 120A)?

A: The P0640EAL incorporates enhanced current handling capability, providing additional design margin for transient suppression. This higher rating does not compromise compatibility and may improve circuit reliability.

Q: What is the impact of ROHS3 compliance on substitution?

A: ROHS3 compliance indicates the P0640EAL meets current environmental and regulatory standards, whereas the TISP4072F3LM does not. For applications subject to regulatory requirements, the P0640EAL is the appropriate selection.

Q: Are there inventory or lead-time considerations for substitution?

A: The P0640EAL is an active product with 20,300 units in stock, compared to the obsolete TISP4072F3LM with 1,146 units available. Long-term availability and supply chain stability favor the P0640EAL for new designs and production planning.