P1900ME Equivalent & Substitute Parts

Part Overview

The P1900ME is a SIDACtor® Transient Voltage Suppressor (TVS) thyristor manufactured by Littelfuse, designed for overvoltage protection in electronic circuits. This component features a 140V off-state voltage rating with 5 kA peak pulse current capability in a TO-218-3 package. The P1900ME is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

P1900ME

LittelfuseIn Stock: 5294P1900ME Datasheet

Current PartRFQ

P1900MEL

Littelfuse Inc.In Stock: 7628P1900MEL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P1900ME is determined by the following critical parameters:

• Breakover voltage: 220V (fixed across the series)
• Peak pulse current rating: 5 kA (must match for equivalent protection)
• On-state voltage: 4V (must match for circuit performance)
• Hold current: 50 mA (must match for device stability)
• Capacitance: 650 pF (must match for signal integrity)
• Package type: TO-218-3 / TO-218AC (physical and thermal compatibility)
• Mounting configuration: Through Hole (PCB assembly compatibility)

The P1900MEL qualifies as a direct substitute based on matching all critical electrical parameters and package specifications. The primary difference is the off-state voltage rating (155V versus 140V), which represents a higher voltage margin while maintaining identical breakover, on-state, and peak pulse characteristics.

Parameter Comparison

Engineering Selection Recommendations

The P1900MEL is the qualified substitute for the obsolete P1900ME. Both components share identical electrical performance across all critical parameters: breakover voltage, on-state voltage, peak pulse current, hold current, and capacitance. The P1900MEL provides the additional advantage of ROHS3 compliance, addressing regulatory requirements for new designs and manufacturing environments where RoHS compliance is mandated.

The higher off-state voltage rating of the P1900MEL (155V versus 140V) provides increased voltage margin without affecting circuit operation, as the breakover threshold remains constant at 220V. This characteristic makes the P1900MEL suitable for direct replacement in existing P1900ME applications.

Frequently Asked Questions (FAQ)

Q: Can the P1900MEL directly replace the P1900ME in existing designs?

A: Yes. The P1900MEL matches all critical electrical parameters of the P1900ME, including breakover voltage (220V), on-state voltage (4V), peak pulse current (5 kA), hold current (50 mA), and capacitance (650 pF). Both components use identical TO-218-3 packaging and through-hole mounting, ensuring mechanical and thermal compatibility.

Q: What is the significance of the different off-state voltage ratings?

A: The P1900ME has a 140V off-state rating, while the P1900MEL has a 155V rating. Both devices trigger at the same 220V breakover voltage. The higher off-state voltage in the P1900MEL provides additional voltage margin during normal operation without affecting protection performance.

Q: Is the P1900MEL suitable for new product designs?

A: Yes. The P1900MEL carries Active product status and ROHS3 compliance, making it appropriate for new designs. The P1900ME is obsolete and should not be specified for new applications.

Q: Are there packaging differences between these parts?

A: Both the P1900ME and P1900MEL use TO-218-3 / TO-218AC packaging with through-hole mounting. The P1900MEL is supplied in tube packaging, while the P1900ME packaging specification was not provided. Both are compatible with standard PCB assembly processes for through-hole components.

Q: What compliance certifications apply to each part?

A: The P1900ME is RoHS non-compliant. The P1900MEL is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronics manufacturing and distribution.