MMSZ5263C-E3-08 Equivalent & Substitute Parts

Part Overview

The MMSZ5263C-E3-08 is a 56 V, 500 mW Zener diode manufactured by Vishay General Semiconductor - Diodes Division in SOD-123 surface mount packaging. This component is classified as an active product and is currently in stock with 1011 units available. The device operates across a temperature range of -55°C to 150°C and maintains ±2% voltage tolerance, making it suitable for precision voltage regulation and protection applications.

Equivalent and substitute parts are identified to address supply chain continuity, inventory availability, and application-specific requirements such as automotive qualification or alternative packaging formats. The substitutes listed maintain electrical compatibility while offering variations in product status, packaging configuration, and tolerance specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	56	V
Power - Maximum	500	mW
Tolerance	±2%	—
Impedance (Maximum)	150	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 43 V
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SOD-123	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the MMSZ5263C-E3-08 is determined by the following critical parameters:

Primary Electrical Compatibility Criteria:

Zener voltage: 56 V nominal
Maximum power dissipation: 500 mW
Package type: SOD-123 surface mount
Reverse leakage current: 100 nA @ 43 V
Impedance: 150 Ohms maximum

Secondary Compatibility Factors:

Operating temperature range: -55°C to 150°C minimum
RoHS3 compliance
Moisture sensitivity level: 1 (Unlimited)

Allowable Variations:

Voltage tolerance: ±2% to ±5% (tighter tolerance is backward compatible)
Packaging format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel®
Product status: Active or Obsolete (both acceptable for electrical equivalence)
Automotive qualification: Optional enhancement (AEC-Q101)

Substitute parts must maintain all primary electrical parameters and package specifications. Variations in tolerance, packaging format, and qualification status do not affect functional interchangeability in the circuit application.

Parameter Comparison

Parameter	MMSZ5263C-E3-08 (Main)	MMSZ5263C-HE3-08 (Substitute)	MMSZ5263B-7-F (Substitute)
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Diodes Incorporated
Voltage - Zener (Nom)	56 V	56 V	56 V
Tolerance	±2%	±2%	±5%
Power - Max	500 mW	500 mW	500 mW
Impedance (Max)	150 Ohms	150 Ohms	150 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 43 V	100 nA @ 43 V	100 nA @ 43 V
Operating Temperature	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C
Package / Case	SOD-123	SOD-123	SOD-123
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Packaging Format	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)
Product Status	Active	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Automotive Qualification	—	AEC-Q101	—

Engineering Selection Recommendations

MMSZ5263C-E3-08 (Primary Selection)

This part is the specified component with active product status and immediate availability (1011 units in stock). It provides ±2% voltage tolerance and Tape & Reel packaging suitable for high-volume automated assembly. Selection of this part is appropriate when the original specification is maintained and supply is confirmed.

MMSZ5263C-HE3-08 (Vishay Equivalent)

This substitute maintains identical electrical parameters and ±2% tolerance specification. It carries AEC-Q101 automotive qualification, making it suitable for applications requiring automotive-grade components. The part is listed as obsolete; however, 3537 units are currently in stock. The Cut Tape & Digi-Reel® packaging format differs from the main part but remains compatible with standard pick-and-place assembly equipment. This substitute is appropriate when automotive qualification is required or when Cut Tape packaging is acceptable.

MMSZ5263B-7-F (Diodes Incorporated Equivalent)

This substitute is manufactured by Diodes Incorporated and maintains all critical electrical parameters. The tolerance specification is ±5%, which is wider than the main part's ±2% tolerance. The operating temperature range extends to -65°C (compared to -55°C minimum), providing enhanced low-temperature performance. This part is active with 6974 units in stock and is packaged in Tape & Reel format. Selection of this part is appropriate when tolerance relaxation to ±5% is acceptable and when supply from an alternative manufacturer is preferred or required.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5263C-HE3-08 be used as a direct replacement for MMSZ5263C-E3-08?

A: Yes. Both parts maintain identical zener voltage (56 V), power rating (500 mW), impedance (150 Ohms), and voltage tolerance (±2%). The primary difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel) and product status (Obsolete versus Active). Electrical performance in the circuit is equivalent.

Q: What is the impact of using MMSZ5263B-7-F with ±5% tolerance instead of ±2%?

A: The ±5% tolerance specification allows for greater variation in the zener voltage around the 56 V nominal value. In applications where precise voltage regulation is critical, this wider tolerance may affect circuit performance. In applications with tolerance margins, the ±5% specification is functionally acceptable. The decision depends on circuit design requirements.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three parts use the SOD-123 surface mount package, which defines identical physical dimensions and land pattern requirements. PCB layout and assembly processes require no modification when substituting between these parts.

Q: Does the AEC-Q101 qualification on MMSZ5263C-HE3-08 affect its use in non-automotive applications?

A: No. AEC-Q101 qualification indicates that the part meets automotive industry reliability standards. This qualification does not restrict use in non-automotive applications; it only confirms that the part meets additional quality and reliability criteria. The part is fully compatible with general-purpose applications.

Q: What is the significance of the extended temperature range (-65°C to 150°C) on MMSZ5263B-7-F?

A: The extended low-temperature limit of -65°C (versus -55°C on the main part) provides additional operational margin in cold environments. For applications operating within the -55°C to 150°C range, both parts perform identically. The extended range on MMSZ5263B-7-F offers additional capability without penalty in standard temperature applications.

Q: Can packaging format (Tape & Reel versus Cut Tape & Digi-Reel®) affect assembly compatibility?

A: Packaging format affects supply chain logistics and feeder compatibility with specific assembly equipment. Both formats are compatible with standard surface mount assembly processes. Selection between formats depends on production equipment capabilities and supply chain preferences, not on electrical or functional compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All three parts (MMSZ5263C-E3-08, MMSZ5263C-HE3-08, and MMSZ5263B-7-F) are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling requirements during storage or assembly.

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