MMSZ5246B-HF Zener Diode Equivalent & Substitute Parts

Part Overview

The MMSZ5246B-HF is a 16 V, 500 mW Zener diode manufactured by Comchip Technology in SOD-123 surface mount packaging. This component is classified as an active product and is ROHS3 compliant. The device operates across a temperature range of -55°C to 150°C and features a ±5% voltage tolerance with a maximum impedance of 17 Ohms. Substitute parts are identified when equivalent electrical specifications, mechanical packaging, and compliance certifications align with the original component, enabling direct replacement in circuit applications without design modification.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	16	V
Power - Maximum	500	mW
Tolerance	±5	%
Impedance (Maximum)	17	Ohms
Current - Reverse Leakage @ 12 V	100	nA
Operating Temperature Range	-55 to 150	°C
Package / Case	SOD-123	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the MMSZ5246B-HF are identified based on strict electrical and mechanical parameter matching. The substitution criteria include:

Critical Parameters for Substitution:

Zener voltage (Nominal): 16 V
Maximum power dissipation: 500 mW
Voltage tolerance: ±5%
Maximum impedance: 17 Ohms
Reverse leakage current @ 12 V: 100 nA
Operating temperature range: -55°C to 150°C
Package type: SOD-123
Mounting configuration: Surface Mount
RoHS compliance: ROHS3

All identified substitute parts meet these electrical and mechanical specifications. Additional qualifications such as AEC-Q101 automotive certification and REACH compliance status are noted where applicable but do not disqualify parts from substitution eligibility.

Parameter Comparison

Parameter	MMSZ5246B-HF (Comchip)	MMSZ5246B-AU_R1_000A1 (Panjit)	MMSZ5246BHE3-TP (Micro Commercial)	MMSZ5246B_R1_00001 (Panjit)
Voltage - Zener (Nom)	16 V	16 V	16 V	16 V
Power - Max	500 mW	500 mW	500 mW	500 mW
Tolerance	±5%	±5%	±5%	±5%
Impedance (Max)	17 Ohms	17 Ohms	17 Ohms	17 Ohms
Current - Reverse Leakage @ 12 V	100 nA	100 nA	100 nA	100 nA
Operating Temperature	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Package / Case	SOD-123	SOD-123	SOD-123	SOD-123
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All four parts listed—MMSZ5246B-HF, MMSZ5246B-AU_R1_000A1, MMSZ5246BHE3-TP, and MMSZ5246B_R1_00001—are active products with identical electrical specifications and SOD-123 surface mount packaging. Each part is ROHS3 compliant and operates within the same temperature range.

Manufacturer-Specific Considerations:

MMSZ5246B-AU_R1_000A1 (Panjit International Inc.) and MMSZ5246BHE3-TP (Micro Commercial Co) carry AEC-Q101 automotive qualification, indicating compliance with automotive industry reliability standards. MMSZ5246B_R1_00001 (Panjit International Inc.) does not list AEC-Q101 qualification in the provided specifications.

All parts are suitable for direct substitution in applications where the specified electrical and thermal parameters are required. Selection between manufacturers may be based on inventory availability, supply chain considerations, or application-specific qualification requirements.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5246B-AU_R1_000A1 replace MMSZ5246B-HF in all applications?

A: Yes. Both parts share identical electrical specifications (16 V nominal zener voltage, 500 mW power rating, ±5% tolerance, 17 Ohms maximum impedance, 100 nA reverse leakage at 12 V) and operate across the same temperature range (-55°C to 150°C). Both are packaged in SOD-123 surface mount configuration and are ROHS3 compliant. The MMSZ5246B-AU_R1_000A1 includes AEC-Q101 automotive qualification, which the MMSZ5246B-HF does not list.

Q: What is the difference between MMSZ5246BHE3-TP and MMSZ5246B_R1_00001?

A: Both parts meet identical electrical and mechanical specifications. MMSZ5246BHE3-TP is manufactured by Micro Commercial Co and carries AEC-Q101 automotive qualification. MMSZ5246B_R1_00001 is manufactured by Panjit International Inc. and does not list AEC-Q101 qualification in the provided data. Both are ROHS3 compliant and operate across -55°C to 150°C.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All four parts are supplied in Tape & Reel (TR) packaging and feature SOD-123 surface mount case configuration, enabling direct substitution on automated assembly equipment without modification to pick-and-place programs or reflow profiles.

Q: Does the ±5% voltage tolerance apply to all substitute parts?

A: Yes. All listed parts maintain ±5% tolerance on the 16 V nominal zener voltage specification, ensuring consistent voltage regulation performance across the entire substitute part group.

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

A: All parts are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

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