MMSZ4706-TP Zener Diode 19V 500mW Equivalent & Substitute Parts

Part Overview

The MMSZ4706-TP is a 19V 500mW Zener diode manufactured by Micro Commercial Co in SOD-123 surface mount packaging. This component is classified as an active product with full RoHS3 compliance and unlimited moisture sensitivity rating. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage applications in electronic circuits. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers while preserving circuit functionality.

Substiute Parts

MMSZ4706-TP

Micro Commercial CoIn Stock: 134117MMSZ4706-TP Datasheet

Current PartRFQ

MMSZ4706T1G

onsemiIn Stock: 8002MMSZ4706T1G Datasheet

SimilarRFQ

MMSZ5249C-E3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 6225MMSZ5249C-E3-18 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MMSZ4706-TP is determined by the following critical parameters:

Primary Substitution Criteria:

• Zener voltage: 19V nominal
• Maximum power dissipation: 500mW
• Package type: SOD-123 surface mount
• Operating temperature range: -55°C to 150°C minimum
• RoHS3 compliance status
• Moisture sensitivity level: 1 (Unlimited)

Secondary Compatibility Factors:

• Tolerance specification (±5% or tighter)
• Reverse leakage current characteristics
• Forward voltage drop specifications
• Regulatory compliance (REACH Unaffected, EAR99 classification)

Parts meeting all primary criteria and maintaining equivalent or superior secondary characteristics are classified as direct substitutes. Packaging format variations (Tape & Reel versus Cut Tape) do not affect electrical substitutability but may impact procurement and assembly workflows.

Parameter Comparison

Engineering Selection Recommendations

MMSZ4706T1G (onsemi) is a direct electrical substitute for the MMSZ4706-TP. Both components share identical base product numbering, zener voltage, power rating, tolerance, and reverse leakage specifications. The onsemi variant demonstrates a lower forward voltage drop (900 mV versus 950 mV at 10 mA), which represents improved efficiency characteristics. Both parts maintain full RoHS3 compliance, REACH Unaffected status, and unlimited moisture sensitivity rating. Packaging format is Tape & Reel for both variants, ensuring compatibility with standard surface mount assembly processes.

MMSZ5249C-E3-18 (Vishay) is an electrical substitute with enhanced tolerance specification. This component maintains the 19V nominal zener voltage and 500mW power rating within the required SOD-123 package. The Vishay part offers ±2% tolerance compared to the ±5% specification of the primary part, providing tighter voltage regulation characteristics. Reverse leakage current is specified at 100 nA @ 14V, which is higher than the 50 nA @ 14.4V specification of the primary part. Packaging format is Cut Tape & Digi-Reel, which differs from the Tape & Reel format of the primary part. Full RoHS3 compliance and REACH Unaffected status are maintained. This substitute is suitable for applications requiring improved voltage tolerance performance.

All three components are active products with current manufacturing status and established supply availability.

Frequently Asked Questions (FAQ)

Q: Can MMSZ4706T1G be used as a direct replacement for MMSZ4706-TP in production assembly?

A: Yes. Both components share identical electrical specifications for zener voltage (19V), power rating (500mW), tolerance (±5%), and reverse leakage current (50 nA @ 14.4V). Both are packaged in SOD-123 surface mount format with Tape & Reel delivery. The onsemi variant exhibits lower forward voltage drop, which is a performance advantage. No circuit redesign or assembly process modification is required.

Q: What is the difference between MMSZ5249C-E3-18 and MMSZ4706-TP?

A: The primary electrical difference is tolerance specification. MMSZ5249C-E3-18 provides ±2% tolerance versus ±5% for MMSZ4706-TP, resulting in tighter zener voltage regulation. Reverse leakage current is higher at 100 nA @ 14V compared to 50 nA @ 14.4V. Packaging format differs: MMSZ5249C-E3-18 uses Cut Tape & Digi-Reel delivery versus Tape & Reel for the primary part. Both maintain identical zener voltage (19V), power rating (500mW), and operating temperature range (-55°C to 150°C).

Q: Are there packaging format considerations when substituting these parts?

A: Yes. MMSZ4706-TP and MMSZ4706T1G are supplied in Tape & Reel format, while MMSZ5249C-E3-18 is supplied in Cut Tape & Digi-Reel format. Tape & Reel packaging is optimized for high-volume automated assembly, while Cut Tape format is suitable for lower-volume or manual assembly workflows. Electrical performance is independent of packaging format. Procurement and assembly logistics should account for these delivery format differences.

Q: Do all three parts meet regulatory compliance requirements?

A: Yes. All three components are RoHS3 compliant, REACH Unaffected, and classified under EAR99 export control. All maintain unlimited moisture sensitivity rating (MSL 1). Regulatory compliance is equivalent across all three parts.

Q: Which substitute part should be selected for improved voltage regulation accuracy?

A: MMSZ5249C-E3-18 provides ±2% tolerance compared to ±5% for the primary part, resulting in tighter zener voltage regulation. This component is suitable for applications requiring enhanced voltage reference accuracy. The trade-off is higher reverse leakage current (100 nA @ 14V) and different packaging format (Cut Tape & Digi-Reel).

Q: Can these parts be used interchangeably in existing designs?

A: MMSZ4706-TP and MMSZ4706T1G are fully interchangeable from an electrical and mechanical standpoint. MMSZ5249C-E3-18 is compatible with the same circuit function but exhibits different tolerance and leakage characteristics. Circuit performance impact depends on application sensitivity to zener voltage tolerance and leakage current specifications. Design review is necessary only if application requirements specify tolerance or leakage parameters tighter than ±5% or 50 nA respectively.