AMMSZ5256A-HF Equivalent & Substitute Parts

Part Overview

The AMMSZ5256A-HF is a surface mount silicon zener diode manufactured by Comchip Technology, rated for 30 V nominal zener voltage with 500 mW maximum power dissipation. This component operates across the automotive temperature range of -50°C to 150°C and carries AEC-Q101 qualification, making it suitable for automotive and industrial applications requiring voltage regulation and transient protection.

The AMMSZ5256A-HF maintains Active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent substitute parts are identified based on matching electrical specifications and mechanical compatibility to ensure direct functional replacement in circuit designs.

Substiute Parts

AMMSZ5256A-HF

Comchip TechnologyIn Stock: 829AMMSZ5256A-HF Datasheet

Current PartRFQ

MMSZ5256A_R1_00001

Panjit International Inc.In Stock: 3672MMSZ5256A_R1_00001 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AMMSZ5256A-HF are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Zener voltage (Vz): 30 V nominal
• Power rating: 500 mW maximum
• Voltage tolerance: ±2%
• Impedance (Zzt): 49 Ohms maximum
• Reverse leakage current: 100 nA @ 23 V
• Forward voltage: 900 mV maximum @ 10 mA
• Operating temperature range: -50°C to 150°C
• Package type: SOD-123 surface mount
• RoHS compliance: ROHS3

The MMSZ5256A_R1_00001 manufactured by Panjit International Inc. meets all specified electrical parameters and mechanical requirements, enabling direct substitution in applications requiring 30 V zener regulation with 500 mW power handling capability.

Parameter Comparison

Engineering Selection Recommendations

The MMSZ5256A_R1_00001 from Panjit International Inc. is a direct electrical and mechanical equivalent to the AMMSZ5256A-HF. Both components share identical zener voltage, power rating, impedance, leakage current, and operating temperature specifications. Both maintain ROHS3 compliance and unlimited moisture sensitivity classification.

Selection between these parts should be based on:

Availability and Lead Time: The MMSZ5256A_R1_00001 currently maintains higher inventory (3632 pcs) compared to the AMMSZ5256A-HF (812 pcs), providing supply chain flexibility.

Automotive Qualification: The AMMSZ5256A-HF carries explicit AEC-Q101 automotive qualification. Applications requiring documented automotive-grade components should specify the Comchip part number. The Panjit substitute does not list AEC-Q101 qualification in the provided data.

Regulatory Compliance: Both parts satisfy ROHS3 and EAR99 export classification requirements. The Panjit part includes documented REACH Unaffected status.

Manufacturing Continuity: Both parts maintain Active product status, ensuring continued availability for production and field service applications.

Frequently Asked Questions (FAQ)

Q: Can the MMSZ5256A_R1_00001 replace the AMMSZ5256A-HF in automotive applications?

A: The MMSZ5256A_R1_00001 matches all electrical and mechanical specifications required for 30 V zener regulation. However, the AMMSZ5256A-HF carries explicit AEC-Q101 automotive qualification. Applications requiring documented automotive-grade certification should use the Comchip part. For non-automotive or applications where AEC-Q101 is not contractually mandated, the Panjit part provides electrical equivalence.

Q: Are the SOD-123 packages physically identical?

A: Both the AMMSZ5256A-HF and MMSZ5256A_R1_00001 use SOD-123 surface mount packaging. This package type is standardized, enabling direct PCB footprint compatibility without layout modifications.

Q: What is the significance of the ±2% tolerance specification?

A: The ±2% tolerance indicates that the zener voltage will remain within 29.4 V to 30.6 V across the specified operating temperature range and under rated conditions. Both parts maintain this tolerance, ensuring equivalent voltage regulation performance in circuit applications.

Q: Does the 49 Ohm impedance specification affect circuit performance?

A: The 49 Ohm maximum impedance (Zzt) defines the dynamic resistance of the zener diode during regulation. Both parts specify identical impedance, ensuring equivalent transient response and voltage ripple characteristics in protection and regulation circuits.

Q: What does MSL 1 (Unlimited) moisture sensitivity mean?

A: MSL 1 indicates the component requires no special moisture control during storage, handling, or assembly. Both parts carry this classification, eliminating moisture-related reliability concerns in standard manufacturing environments.

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

A: The MMSZ5256A_R1_00001 provides direct electrical substitution for the AMMSZ5256A-HF based on matching zener voltage, power rating, impedance, leakage current, and operating temperature specifications. No circuit modifications are required. PCB footprints remain compatible due to identical SOD-123 packaging.