TISP4240M3LM Equivalent & Substitute Parts

Part Overview

The TISP4240M3LM is a 180V off-state thyristor-based transient voltage suppressor manufactured by Bourns Inc., designed for surge protection applications requiring high peak pulse current handling. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

TISP4240M3LM

Bourns Inc.In Stock: 1003TISP4240M3LM Datasheet

Current PartRFQ

P1500EBL

Littelfuse Inc.In Stock: 20213P1500EBL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TISP4240M3LM is determined by the following critical parameters:

• Voltage Rating Compatibility: Off-state voltage and breakover voltage must support the application's transient suppression requirements
• Current Handling Capacity: Peak pulse current ratings (8/20µs and 10/1000µs) must meet or exceed circuit protection demands
• Hold Current: Minimum holding current ensures reliable thyristor latching behavior
• Package Compatibility: Through-hole TO-226-2 / TO-92-2 package maintains mechanical and electrical interface compatibility
• Capacitance: Parasitic capacitance affects high-frequency circuit performance

The P1500EBL from Littelfuse Inc. operates within the allowed parameter ranges for this product category and maintains identical package specifications.

Parameter Comparison

Engineering Selection Recommendations

The TISP4240M3LM is classified as obsolete. The P1500EBL (SIDACtor® series) from Littelfuse Inc. is an active product with ROHS3 compliance, providing improved regulatory status compared to the non-compliant original component. Both devices share identical package specifications and hold current ratings, enabling direct mechanical and electrical interface compatibility in through-hole applications.

The P1500EBL demonstrates higher peak pulse current capacity (250A vs. 220A at 8/20µs) and superior current handling at 10/1000µs pulse duration (80A vs. 50A), providing enhanced protection margins in transient suppression circuits.

Frequently Asked Questions (FAQ)

Q: Can the P1500EBL directly replace the TISP4240M3LM in existing designs?

A: Both components use identical TO-226-2 / TO-92-2 through-hole packages and share the same 150mA hold current specification. Mechanical mounting is directly compatible. Electrical compatibility depends on circuit voltage and current requirements; verify that the P1500EBL's lower off-state voltage (140V vs. 180V) and breakover voltage (180V vs. 240V) are acceptable for your application.

Q: What are the key electrical differences between these parts?

A: The P1500EBL operates at lower voltage thresholds (140V off-state, 180V breakover) compared to the TISP4240M3LM (180V off-state, 240V breakover). The P1500EBL provides higher peak pulse current capacity (250A vs. 220A at 8/20µs). On-state voltage is slightly higher (4V vs. 3V). Capacitance and hold current are identical.

Q: Does package compatibility guarantee functional equivalence?

A: No. Identical packaging ensures mechanical fit and pin compatibility, but electrical parameters must be verified against circuit requirements. The voltage ratings and current handling specifications must be suitable for the intended transient suppression application.

Q: What is the regulatory status difference?

A: The TISP4240M3LM is RoHS non-compliant and obsolete. The P1500EBL is ROHS3 compliant and maintains active product status, providing improved long-term availability and regulatory alignment.