TISP4290F3LM Equivalent & Substitute Parts

Part Overview

The TISP4290F3LM is a 220V 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 identification of suitable substitute parts essential for ongoing design support and procurement planning. The part operates with a 290V breakover voltage and 3V on-state voltage, providing reliable transient suppression in through-hole mounting configurations.

Substiute Parts

TISP4290F3LM

Bourns Inc.In Stock: 1073TISP4290F3LM Datasheet

Current PartRFQ

P2600EAL

Littelfuse Inc.In Stock: 2353P2600EAL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TISP4290F3LM is determined by the following critical parameters:

• Voltage Rating Match: Off-state voltage of 220V is the primary selection criterion. Substitute parts must maintain identical off-state voltage to ensure proper circuit protection thresholds.
• Breakover Voltage Compatibility: The 290V breakover voltage establishes the trigger point for transient suppression. Substitute parts with breakover voltages within the operational range of the protected circuit are acceptable.
• Peak Pulse Current Capability: The 120A peak pulse current (8/20µs) defines the maximum transient energy the device can safely dissipate. Substitute parts must meet or exceed this specification.
• Package and Mounting: The TO-226-2 package with through-hole mounting is required for direct board-level compatibility without redesign.
• On-State Voltage and Hold Current: These parameters ensure proper device operation during transient events and recovery characteristics.

The P2600EAL from Littelfuse Inc. qualifies as a substitute based on matching off-state voltage, compatible breakover voltage, superior peak pulse current rating, and identical package configuration.

Parameter Comparison

Engineering Selection Recommendations

The P2600EAL represents a direct functional substitute for the obsolete TISP4290F3LM. Key selection factors include:

Product Status: The TISP4290F3LM is obsolete, whereas the P2600EAL is active and in production. This ensures long-term availability and supply chain continuity for new designs and ongoing production requirements.

Electrical Compatibility: The P2600EAL maintains the critical 220V off-state voltage specification and provides enhanced peak pulse current capability (150A versus 120A), offering improved transient suppression margin. The 10V increase in breakover voltage (300V versus 290V) remains within acceptable operational parameters for most circuit applications.

Regulatory Compliance: The P2600EAL is ROHS3 compliant, whereas the TISP4290F3LM is non-compliant. For applications subject to RoHS regulations, the P2600EAL is the required selection.

Package Compatibility: Both devices utilize identical TO-226-2 through-hole packaging, enabling direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the P2600EAL directly replace the TISP4290F3LM without circuit modifications?

A: Yes. Both devices share identical off-state voltage (220V), compatible breakover voltage (290V vs. 300V), and identical package configuration (TO-226-2). The P2600EAL's higher peak pulse current rating (150A vs. 120A) provides enhanced protection capability without requiring circuit redesign.

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

A: The TISP4290F3LM has a 290V breakover voltage while the P2600EAL has 300V. This 10V difference represents a 3.4% variation and remains within typical circuit tolerance margins for transient suppression applications. Both devices trigger protection at voltages above their respective breakover thresholds.

Q: Why is the P2600EAL's on-state voltage 1V higher than the TISP4290F3LM?

A: The P2600EAL exhibits a 4V on-state voltage compared to the TISP4290F3LM's 3V. This 1V difference is within normal device variation for thyristor-based TVS components and does not impact circuit functionality or protection performance in standard applications.

Q: Does the lower capacitance of the P2600EAL (35pF vs. 44pF) affect substitution suitability?

A: No. The lower capacitance of the P2600EAL is advantageous for high-frequency circuit applications, as it reduces parasitic effects. This represents an improvement over the original part specification.

Q: Is RoHS compliance a factor in selecting between these parts?

A: Yes. The TISP4290F3LM is RoHS non-compliant, while the P2600EAL is ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the P2600EAL is the mandatory selection.

Q: Are there any package or mounting differences between these devices?

A: No. Both the TISP4290F3LM and P2600EAL use TO-226-2 through-hole packaging with identical pin configurations, allowing direct substitution on existing printed circuit boards.