AMMSZ5239A-HF Zener Diode Equivalent & Substitute Parts

Part Overview

The AMMSZ5239A-HF is an automotive-grade Zener diode manufactured by Comchip Technology, rated at 9.1 V nominal with 500 mW power dissipation in a surface mount SOD-123 package. This component is designed for voltage regulation and protection applications in automotive and industrial circuits. The part maintains Active product status with full AEC-Q101 automotive qualification and ROHS3 compliance.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, design flexibility, or manufacturing availability. Substitutes must maintain identical or functionally equivalent parameters across voltage rating, power rating, package type, and operating temperature range.

Substiute Parts

AMMSZ5239A-HF

Comchip TechnologyIn Stock: 858AMMSZ5239A-HF Datasheet

Current PartRFQ

MMSZ5239A_R1_00001

Panjit International Inc.In Stock: 4101MMSZ5239A_R1_00001 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AMMSZ5239A-HF is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Zener voltage rating: 9.1 V nominal
• Tolerance: ±1.98%
• Maximum power dissipation: 500 mW
• Maximum impedance: 10 Ohms
• Reverse leakage current: 3 µA @ 6.5 V
• Forward voltage: 900 mV @ 10 mA
• Operating temperature range: -50°C to 150°C (TJ)
• Package type: SOD-123 surface mount
• Mounting configuration: Surface mount

Compliance Requirements:

• RoHS3 compliance
• Moisture Sensitivity Level 1 (Unlimited)
• Active product status

The substitute part MMSZ5239A_R1_00001 manufactured by Panjit International Inc. meets all primary substitution criteria and maintains full electrical and mechanical compatibility with the AMMSZ5239A-HF.

Parameter Comparison

Engineering Selection Recommendations

MMSZ5239A_R1_00001 (Panjit International Inc.) is a direct parametric equivalent to the AMMSZ5239A-HF. Selection between these parts is based on the following factors:

Availability and Inventory: The MMSZ5239A_R1_00001 maintains higher inventory levels (4059 Pcs) compared to the AMMSZ5239A-HF (777 Pcs), providing improved supply chain flexibility for high-volume production requirements.

Compliance and Certification: Both parts maintain Active product status, ROHS3 compliance, and identical moisture sensitivity ratings. The MMSZ5239A_R1_00001 includes documented REACH Unaffected status, providing additional regulatory transparency for European market applications.

Electrical Performance: All critical electrical parameters are identical across both parts, including zener voltage, tolerance, power rating, impedance, reverse leakage, and operating temperature range. Direct substitution in existing circuit designs requires no parameter adjustment or circuit redesign.

Package and Mounting: Both parts utilize identical SOD-123 surface mount packaging, ensuring mechanical compatibility with existing PCB layouts and assembly processes without modification to footprints or reflow profiles.

Automotive Grade Consideration: The AMMSZ5239A-HF carries explicit AEC-Q101 automotive qualification. The MMSZ5239A_R1_00001 does not specify AEC-Q101 qualification in the provided data. For applications requiring automotive-grade certification, the AMMSZ5239A-HF remains the specified choice. For non-automotive applications or where automotive qualification is not contractually mandated, the MMSZ5239A_R1_00001 provides equivalent electrical performance.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5239A_R1_00001 be used as a direct replacement for AMMSZ5239A-HF in automotive applications?

A: The MMSZ5239A_R1_00001 provides identical electrical performance and package compatibility. However, the AMMSZ5239A-HF carries explicit AEC-Q101 automotive qualification while the MMSZ5239A_R1_00001 does not specify this certification in available documentation. For applications requiring automotive-grade components, verify AEC-Q101 compliance requirements with the design specification before substitution.

Q: Are there any differences in the SOD-123 package between these parts?

A: Both parts utilize SOD-123 surface mount packaging with identical mechanical specifications. PCB footprints, reflow profiles, and assembly processes are directly compatible without modification.

Q: What is the significance of the ±1.98% tolerance specification?

A: The ±1.98% tolerance defines the acceptable deviation of the zener voltage from the 9.1 V nominal rating. Both parts maintain this identical tolerance, ensuring equivalent voltage regulation performance across the specified operating range.

Q: How do the reverse leakage current specifications compare?

A: Both parts specify 3 µA maximum reverse leakage current measured at 6.5 V. This parameter is critical for applications requiring low standby current or high impedance bias conditions. Equivalence is confirmed.

Q: What does Moisture Sensitivity Level 1 (Unlimited) mean for storage and handling?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions. Both parts can be stored and handled under standard industrial conditions without special desiccant packaging or time-limited shelf life constraints.

Q: Is the REACH Unaffected status of MMSZ5239A_R1_00001 significant?

A: REACH Unaffected status indicates the component is not subject to REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) regulatory requirements. This provides additional regulatory clarity for European market applications. The AMMSZ5239A-HF does not specify REACH status in the provided data.

Q: Can these parts be used interchangeably in the same circuit without testing?

A: Both parts meet identical electrical specifications for zener voltage, power rating, impedance, leakage current, and operating temperature. Direct substitution in existing circuit designs is supported by parametric equivalence. Automotive qualification differences noted above remain the only functional distinction.