AMMSZ5258A-HF Equivalent & Substitute Parts

Part Overview

The AMMSZ5258A-HF is a surface mount Zener diode manufactured by Comchip Technology, rated at 36 V nominal Zener voltage with 500 mW maximum power dissipation. This component operates across the automotive temperature range (-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 part is currently in active production status with 971 units in stock. Equivalent substitute parts are identified based on matching electrical specifications and mechanical compatibility to support procurement flexibility, inventory management, and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	36	V
Tolerance	±2	%
Power - Max	500	mW
Impedance (Max)	70	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 27 V
Voltage - Forward (Max) @ If	900	mV @ 10 mA
Operating Temperature Range	-50 to 150	°C (TJ)
Package / Case	SOD-123	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the AMMSZ5258A-HF is determined by strict equivalence across the following critical parameters:

Zener Voltage (Vz): 36 V nominal with ±2% tolerance
Power Rating: 500 mW maximum dissipation
Impedance (Zzt): 70 Ohms maximum
Reverse Leakage Current: 100 nA @ 27 V
Forward Voltage: 900 mV maximum @ 10 mA
Operating Temperature Range: -50°C to 150°C (TJ)
Package: SOD-123 surface mount
Compliance: ROHS3 compliant, MSL 1

The identified substitute part MMSZ5258A_R1_00001 (Panjit International Inc.) meets all specified electrical and mechanical parameters. This part maintains identical functional performance within the defined tolerance bands and operates across the same temperature envelope. Both parts are classified as active products with established supply availability.

Parameter Comparison

Parameter	AMMSZ5258A-HF (Comchip)	MMSZ5258A_R1_00001 (Panjit)	Match Status
Voltage - Zener (Nom)	36 V	36 V	Equivalent
Tolerance	±2%	±2%	Equivalent
Power - Max	500 mW	500 mW	Equivalent
Impedance (Max)	70 Ohms	70 Ohms	Equivalent
Current - Reverse Leakage @ Vr	100 nA @ 27 V	100 nA @ 27 V	Equivalent
Voltage - Forward (Max) @ If	900 mV @ 10 mA	Not specified in substitute data	Primary part specified
Operating Temperature Range	-50°C to 150°C (TJ)	-50°C to 150°C (TJ)	Equivalent
Package / Case	SOD-123	SOD-123	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

Primary Part: AMMSZ5258A-HF

The AMMSZ5258A-HF is recommended as the primary selection for applications requiring automotive-grade qualification. This part carries AEC-Q101 certification, which is mandatory for automotive electronic systems. The part is actively produced by Comchip Technology with 971 units currently in inventory.

Substitute Part: MMSZ5258A_R1_00001

The MMSZ5258A_R1_00001 (Panjit International Inc.) is a direct electrical and mechanical equivalent suitable for applications where supply constraints on the primary part occur. This substitute maintains all critical electrical parameters and operates within the same temperature envelope. The part is ROHS3 compliant and carries REACH Unaffected status. Current inventory availability is 4058 units.

Both parts are classified as active products with established manufacturing processes. Selection between these parts should be based on procurement availability, supply chain requirements, and inventory management objectives. No functional performance difference exists between the two parts within the specified parameter ranges.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5258A_R1_00001 be used as a direct replacement for AMMSZ5258A-HF in automotive applications?

A: The MMSZ5258A_R1_00001 is electrically and mechanically equivalent to the AMMSZ5258A-HF across all specified parameters. However, the primary part carries explicit AEC-Q101 automotive qualification. Use of the substitute part in automotive applications requires confirmation that the application does not mandate AEC-Q101 certification as a design requirement.

Q: Are there any package or mounting differences between these parts?

A: Both parts use identical SOD-123 surface mount packaging. No modifications to PCB layout, footprint, or assembly processes are required when substituting between these parts.

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

A: The ±2% tolerance on Zener voltage indicates that the actual Zener voltage will fall within the range of 35.28 V to 36.72 V. Both the primary and substitute parts maintain this tolerance band, ensuring consistent voltage regulation performance across the specified operating range.

Q: How do the reverse leakage current specifications affect circuit design?

A: Both parts specify 100 nA maximum reverse leakage current at 27 V. This parameter is critical for applications requiring low standby current or high impedance paths. The identical specification ensures equivalent circuit behavior in voltage regulation and transient protection applications.

Q: What does MSL 1 (Unlimited) mean for component handling?

A: Moisture Sensitivity Level 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. Both parts carry this classification, eliminating any moisture-related constraints on inventory management or component procurement timing.

Q: Are there compliance or regulatory differences between these parts?

A: Both parts are ROHS3 compliant. The substitute part carries additional REACH Unaffected status. No regulatory barriers exist to using either part in compliant applications. The primary difference is the automotive qualification status of the AMMSZ5258A-HF.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message