MMSZ5249C-G3-08 Equivalent & Substitute Parts

Part Overview

The MMSZ5249C-G3-08 is a 19 V, 500 mW Zener diode manufactured by Vishay General Semiconductor - Diodes Division in SOD-123 surface mount package. This component is classified as an active product and is RoHS3 compliant. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage applications in electronic circuits. Alternative part numbers may be required due to inventory availability, packaging format preferences, or specific tolerance and performance requirements in system design.

Substiute Parts

MMSZ5249C-G3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 1011MMSZ5249C-G3-08 Datasheet

Current PartRFQ

MMSZ5249C-E3-18

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

Parametric EquivalentRFQ

MMSZ4706T1G

onsemiIn Stock: 8002MMSZ4706T1G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of Zener diodes is determined by equivalence in the following critical parameters: nominal Zener voltage (Vz), maximum power dissipation rating (Pmax), package type, and mounting technology. All substitute parts listed maintain the 19 V nominal Zener voltage and 500 mW power rating required for functional compatibility. The SOD-123 surface mount package is consistent across all parts, ensuring mechanical and thermal compatibility on printed circuit boards.

Tolerance variations and reverse leakage specifications are secondary parameters that may differ between substitutes. These differences do not prevent functional substitution but should be evaluated based on circuit requirements for voltage regulation accuracy and leakage current performance.

Packaging format (Tape & Reel versus Cut Tape & Digi-Reel) represents a logistical distinction that does not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

MMSZ5249C-E3-18 is a parametric equivalent to the MMSZ5249C-G3-08. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications: 19 V nominal Zener voltage, ±2% tolerance, 500 mW power rating, 23 Ohms maximum impedance, and 100 nA reverse leakage current. The primary distinction is packaging format: MMSZ5249C-E3-08 is supplied in Cut Tape & Digi-Reel format rather than Tape & Reel. Both are active products with ROHS3 compliance and MSL 1 rating. Selection between these two is based on procurement and assembly line requirements.

MMSZ4706T1G is a manufacturer-recommended substitute produced by onsemi. This part maintains the 19 V nominal Zener voltage and 500 mW power rating in SOD-123 package. Key differences include: tolerance specification of ±5% (versus ±2%), reverse leakage current of 50 nA @ 14.4 V (versus 100 nA @ 14 V), and impedance specification not provided. The MMSZ4706T1G is suitable for applications where the wider tolerance and lower leakage current are acceptable. This part is also active, ROHS3 compliant, and MSL 1 rated.

All three parts are suitable for surface mount assembly and operate across the -55°C to 150°C temperature range. Selection should be based on circuit tolerance requirements, leakage current specifications, and packaging availability.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5249C-E3-18 be used as a direct replacement for MMSZ5249C-G3-08?

A: Yes. Both parts are electrically identical with 19 V nominal Zener voltage, ±2% tolerance, 500 mW power rating, and identical impedance and leakage specifications. The difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel). Electrical and mechanical compatibility is complete.

Q: What are the limitations of using MMSZ4706T1G as a substitute?

A: The MMSZ4706T1G has a ±5% tolerance specification compared to ±2% for the MMSZ5249C-G3-08. This wider tolerance may affect voltage regulation accuracy in precision applications. Additionally, reverse leakage current is specified at a different measurement point (14.4 V versus 14 V). Impedance is not specified for the MMSZ4706T1G. Evaluate circuit requirements for voltage accuracy and leakage performance before selection.

Q: Are all three parts RoHS compliant?

A: Yes. MMSZ5249C-G3-08, MMSZ5249C-E3-18, and MMSZ4706T1G are all ROHS3 compliant and REACH unaffected. All parts have Moisture Sensitivity Level 1 (Unlimited).

Q: Do these parts require different PCB footprints?

A: No. All three parts use the SOD-123 surface mount package, which specifies identical mechanical dimensions and pin configuration. PCB footprints are interchangeable.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging?

A: Tape & Reel (TR) is continuous reel packaging for automated pick-and-place assembly. Cut Tape & Digi-Reel is pre-cut tape format suitable for smaller quantity assembly or manual handling. Both formats contain the same component; the difference is logistical and does not affect electrical performance.

Q: Which substitute should be selected for high-precision voltage regulation?

A: MMSZ5249C-E3-18 is recommended for applications requiring high precision. It maintains the ±2% tolerance of the original MMSZ5249C-G3-08. The MMSZ4706T1G, with ±5% tolerance, is suitable for applications with less stringent voltage accuracy requirements.

Q: Are there temperature range differences between the substitutes?

A: No. All three parts operate across the identical temperature range of -55°C to 150°C.