Equivalent & Substitute Parts for DZ2405100L

Part Overview

The DZ2405100L is a Zener diode manufactured by Panasonic Electronic Components, rated at 5.1 V nominal voltage with 2 W maximum power dissipation. This surface mount component is designed for voltage regulation and protection applications in electronic circuits. The part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines. Substitute parts must maintain compatibility across voltage regulation, power handling, mounting type, and package specifications.

Substiute Parts

DZ2405100L

Panasonic Electronic ComponentsIn Stock: 123194DZ2405100L Datasheet

Current PartRFQ

KDZVTFTR5.1B

Rohm SemiconductorIn Stock: 10359KDZVTFTR5.1B Datasheet

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KDZVTR5.1B

Rohm SemiconductorIn Stock: 24988KDZVTR5.1B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the DZ2405100L is determined by the following critical parameters:

Voltage Regulation Capability: The nominal Zener voltage (Vz) and tolerance band establish the voltage reference function. The DZ2405100L operates at 5.1 V ±5%, defining the acceptable voltage window for circuit operation.

Power Dissipation Rating: Maximum power (Pmax) of 2 W determines thermal handling capacity and circuit current limits. Substitute parts must support equivalent or greater power ratings to maintain safe operation.

Reverse Leakage Characteristics: Current leakage at specified reverse voltage (20 µA @ 1 V) affects circuit standby current and precision regulation performance.

Surface Mount Compatibility: Mounting type and package form factor (SOD-128) ensure mechanical and electrical compatibility with printed circuit board layouts and assembly processes.

Regulatory Compliance: RoHS and moisture sensitivity specifications confirm environmental and manufacturing process compatibility.

The substitute parts KDZVTR5.1B and KDZVTFTR5.1B are identified as functional alternatives based on matching reverse leakage characteristics, surface mount configuration, and active product status. However, these substitutes operate at 5.4 V nominal voltage with reduced maximum power rating (1 W), requiring circuit-level evaluation for voltage tolerance and thermal margin compatibility.

Parameter Comparison

Engineering Selection Recommendations

KDZVTR5.1B and KDZVTFTR5.1B Substitution Considerations

Both Rohm Semiconductor alternatives maintain active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. The reverse leakage specification (20 µA @ 1 V) matches the original DZ2405100L, preserving circuit standby current characteristics.

Voltage Differential: The substitute parts operate at 5.4 V nominal voltage compared to the DZ2405100L at 5.1 V. This 0.3 V offset (approximately 5.9% higher) falls within typical circuit tolerance margins for 5 V regulated systems but requires validation against specific application voltage thresholds.

Power Rating Reduction: The substitute parts are rated at 1 W maximum power, representing a 50% reduction from the original 2 W specification. Applications requiring sustained power dissipation above 1 W must employ alternative components or circuit modifications to limit current.

Package Form Factor: The substitute parts use SOD-123F packaging, differing from the original SOD-128 package. Physical dimensions and land pattern compatibility with existing printed circuit board layouts must be confirmed prior to implementation.

KDZVTFTR5.1B Automotive Qualification: This variant includes AEC-Q101 automotive qualification and extended operating temperature rating (150°C TJ), providing enhanced reliability for automotive and industrial applications.

Frequently Asked Questions (FAQ)

Q: Can KDZVTR5.1B or KDZVTFTR5.1B be used as direct replacements for DZ2405100L?

A: Both parts share identical reverse leakage characteristics and surface mount configuration. However, the 0.3 V voltage difference and 50% reduction in power rating require circuit-level compatibility assessment. Direct substitution is not guaranteed without application-specific validation.

Q: What is the significance of the voltage difference between 5.1 V and 5.4 V?

A: The DZ2405100L operates at 5.1 V ±5% (4.845 V to 5.355 V tolerance band), while the substitute parts operate at 5.4 V. The 5.4 V nominal voltage exceeds the upper tolerance limit of the original specification. Applications with strict voltage regulation requirements must evaluate circuit performance at the higher voltage level.

Q: Why do the substitute parts have lower power ratings?

A: The KDZVTR5.1B and KDZVTFTR5.1B are rated at 1 W maximum power, compared to 2 W for the DZ2405100L. This reflects different thermal design and package capabilities. Circuits designed for 2 W dissipation must either reduce operating current or select alternative components with higher power ratings.

Q: Are there package compatibility issues between SOD-128 and SOD-123F?

A: Yes. SOD-128 and SOD-123F are distinct package outlines with different physical dimensions and land patterns. Printed circuit board layouts designed for SOD-128 components require modification to accommodate SOD-123F packages. Footprint conversion or board redesign may be necessary.

Q: What is the difference between KDZVTR5.1B and KDZVTFTR5.1B?

A: Both parts share the same electrical specifications (5.4 V, 1 W, 20 µA reverse leakage). KDZVTFTR5.1B includes AEC-Q101 automotive qualification and is specified for 150°C operating temperature. KDZVTR5.1B does not include automotive qualification. Selection depends on application requirements and environmental operating conditions.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both KDZVTR5.1B and KDZVTFTR5.1B are ROHS3 compliant, meeting current environmental and regulatory requirements. The original DZ2405100L is RoHS compliant, ensuring regulatory continuity across substitution.

Q: What is the moisture sensitivity level for the substitute parts?

A: Both substitute parts are rated MSL 1 (Unlimited), matching the original DZ2405100L specification. This indicates minimal moisture sensitivity and no special storage or handling requirements.