TISP4070M3LM Equivalent & Substitute Parts

Part Overview

The TISP4070M3LM is a 58V off-state thyristor transient voltage suppressor manufactured by Bourns Inc., designed for through-hole mounting in TO-226-2 and TO-92-2 packages. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part delivers 220 A peak pulse current (8/20µs) with a 70V breakover voltage and 3V on-state voltage, suitable for transient suppression applications requiring high current handling capacity.

Substiute Parts

TISP4070M3LM

Bourns Inc.In Stock: 1149TISP4070M3LM Datasheet

Current PartRFQ

P0640EAL

LittelfuseIn Stock: 20354P0640EAL Datasheet

SimilarRFQ

P0640EBL

Littelfuse Inc.In Stock: 2055P0640EBL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TISP4070M3LM is determined by the following critical parameters:

• Off-State Voltage: Must be 58V to maintain circuit protection thresholds
• Breakover Voltage: Acceptable range 70V to 77V, allowing for minor voltage tolerance variations
• On-State Voltage: Range 3V to 4V acceptable for forward conduction characteristics
• Peak Pulse Current (8/20µs): Minimum 150A required; higher ratings (220A, 250A) provide enhanced transient suppression capability
• Package Compatibility: TO-226-2 or TO-92-2 required for mechanical and electrical interchangeability
• Mounting Type: Through-hole configuration mandatory for PCB integration compatibility
• Hold Current (Ih): 150mA specification consistent across all candidates

The substitute parts P0640EAL and P0640EBL, both manufactured by Littelfuse Inc. under the SIDACtor® series, meet these substitution criteria while offering active product status and improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

P0640EAL Selection: This substitute provides 150A peak pulse current (8/20µs), representing a 32% reduction from the original TISP4070M3LM specification. P0640EAL is suitable for applications where transient suppression requirements do not demand the full 220A capacity. The part carries active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

P0640EBL Selection: This substitute provides 250A peak pulse current (8/20µs), exceeding the original TISP4070M3LM specification by 14%. P0640EBL is appropriate for applications requiring enhanced transient suppression margin or where future design upgrades may demand higher current handling. The part carries active product status and ROHS3 compliance.

Both Littelfuse substitutes feature identical off-state voltage (58V) and hold current (150mA) specifications, ensuring functional compatibility. The 7V increase in breakover voltage (70V to 77V) represents acceptable tolerance variation within thyristor device characteristics. Both parts are available in active production status, providing supply chain continuity superior to the obsolete TISP4070M3LM.

Frequently Asked Questions (FAQ)

Q: Can P0640EAL replace TISP4070M3LM in all applications?

A: P0640EAL is functionally compatible where peak pulse current requirements do not exceed 150A (8/20µs). Applications designed for the full 220A capacity of TISP4070M3LM require evaluation to confirm 150A sufficiency. Off-state voltage, breakover voltage, and package compatibility are equivalent.

Q: What is the impact of the 7V breakover voltage difference between TISP4070M3LM (70V) and the Littelfuse substitutes (77V)?

A: The 7V increase represents normal device tolerance variation within thyristor specifications. Both voltage levels maintain the 58V off-state protection threshold. Circuit designs must confirm that the 77V breakover point does not conflict with system overvoltage protection requirements.

Q: Are P0640EAL and P0640EBL interchangeable with each other?

A: Both parts share identical off-state voltage (58V), breakover voltage (77V), on-state voltage (4V), hold current (150mA), and package specifications (TO-226-2, TO-92-2). They differ only in peak pulse current rating: P0640EAL at 150A and P0640EBL at 250A. Selection depends on application current requirements.

Q: Does the 60pF capacitance of Littelfuse substitutes versus 120pF of TISP4070M3LM affect circuit performance?

A: Capacitance differences must be evaluated within specific circuit context. The 50% reduction in capacitance may affect high-frequency transient response characteristics. Circuit simulation or testing is necessary to confirm performance equivalence in frequency-sensitive applications.

Q: Are the Littelfuse SIDACtor® parts suitable for new designs?

A: Both P0640EAL and P0640EBL carry active product status and ROHS3 compliance, making them appropriate for new design implementations. The obsolete status of TISP4070M3LM supports transition to these active alternatives for long-term supply chain stability.

Q: What is the difference between TO-226-2 and TO-92-2 package designations?

A: Both designations refer to the same physical through-hole package configuration used by all three parts. TO-226-2 and TO-92-2 (TO-226AC) are equivalent package identifiers for this component category.