AMMSZ5246A-HF Zener Diode Equivalent & Substitute Parts

Part Overview

The AMMSZ5246A-HF is a 16 V, 500 mW surface mount zener diode manufactured by Comchip Technology in SOD-123 package. This component is classified as an automotive-grade diode with AEC-Q101 qualification and is actively produced. The part is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across manufacturers. Alternative sources for this zener diode are necessary to support supply chain flexibility, inventory availability, and procurement optimization while maintaining identical functional performance.

Substiute Parts

AMMSZ5246A-HF

Comchip TechnologyIn Stock: 1019AMMSZ5246A-HF Datasheet

Current PartRFQ

MMSZ5246A-AU_R1_000A1

Panjit International Inc.In Stock: 9690MMSZ5246A-AU_R1_000A1 Datasheet

Parametric EquivalentRFQ

MMSZ5246A_R1_00001

Panjit International Inc.In Stock: 12001MMSZ5246A_R1_00001 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AMMSZ5246A-HF are qualified based on strict equivalence of the following electrical and mechanical parameters:

• Zener voltage: 16 V nominal
• Tolerance: ±2%
• Maximum power dissipation: 500 mW
• Maximum impedance: 17 Ohms
• Reverse leakage current: 100 nA @ 12 V
• Forward voltage: 900 mV maximum @ 10 mA
• Operating temperature range: -50°C to 150°C
• Package type: SOD-123 surface mount
• Automotive grade classification
• AEC-Q101 qualification
• ROHS3 compliance
• MSL 1 rating

All identified substitute parts maintain these parameters without deviation. Substitution is valid only when all parameters remain within specified tolerances and all certifications are retained.

Parameter Comparison

Engineering Selection Recommendations

MMSZ5246A-AU_R1_000A1 (Panjit International Inc.)

This substitute maintains full parametric equivalence with the AMMSZ5246A-HF. Both parts carry automotive grade classification and AEC-Q101 qualification. ROHS3 compliance and MSL 1 rating are identical. All critical electrical parameters—zener voltage, tolerance, power rating, impedance, and reverse leakage—are matched. This part is suitable for direct substitution in automotive applications requiring AEC-Q101 certified components.

MMSZ5246A_R1_00001 (Panjit International Inc.)

This substitute matches all core electrical parameters and packaging specifications. ROHS3 compliance and MSL 1 rating are maintained. However, automotive grade classification and AEC-Q101 qualification are not specified for this variant. This part is suitable for applications where automotive qualification is not a requirement. Electrical performance is equivalent to the main part across all specified parameters.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5246A-AU_R1_000A1 replace AMMSZ5246A-HF in automotive applications?

A: Yes. Both parts are automotive-grade, AEC-Q101 qualified, and maintain identical electrical parameters including 16 V zener voltage, 500 mW power rating, ±2% tolerance, and 17 Ohms maximum impedance. Package type (SOD-123 surface mount) and operating temperature range (-50°C to 150°C) are identical.

Q: What is the difference between the two Panjit substitute parts?

A: MMSZ5246A-AU_R1_000A1 carries automotive grade and AEC-Q101 qualification. MMSZ5246A_R1_00001 does not specify these certifications. Both maintain identical electrical parameters and SOD-123 packaging. Selection depends on whether automotive qualification is required for the application.

Q: Are all three parts interchangeable in terms of PCB footprint?

A: Yes. All three parts use SOD-123 surface mount package with identical mechanical dimensions and land pattern requirements. No PCB redesign is necessary when substituting between these parts.

Q: What parameters determine substitution validity for this zener diode?

A: Substitution is valid when the following parameters are maintained: 16 V nominal zener voltage, ±2% tolerance, 500 mW maximum power, 17 Ohms maximum impedance, 100 nA reverse leakage @ 12 V, -50°C to 150°C operating temperature, and SOD-123 surface mount package. Compliance certifications (ROHS3, MSL 1) must also be retained.

Q: Can MMSZ5246A_R1_00001 be used in applications requiring AEC-Q101 certification?

A: No. MMSZ5246A_R1_00001 does not specify AEC-Q101 qualification. For applications requiring automotive qualification, use AMMSZ5246A-HF or MMSZ5246A-AU_R1_000A1.

Q: Are there any differences in reverse leakage current specifications?

A: All three parts specify 100 nA reverse leakage current @ 12 V. This parameter is identical across all options.

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

A: All three parts carry MSL 1 rating, indicating unlimited shelf life under standard storage conditions. No special moisture control measures are required during handling or storage.