ZMM5241B-7 Equivalent & Substitute Parts

Part Overview

The ZMM5241B-7 is a Zener diode rated at 11 V, 500 mW with ±5% tolerance, manufactured by Diodes Incorporated in Mini MELF surface mount packaging. This component is classified as obsolete, indicating that direct replacements from the original manufacturer are no longer in active production. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this zener diode specification.

Substiute Parts

ZMM5241B-7

Diodes IncorporatedIn Stock: 5510ZMM5241B-7 Datasheet

Current PartRFQ

MMSZ5241B-7-F

Diodes IncorporatedIn Stock: 32260MMSZ5241B-7-F Datasheet

MFR RecommendedRFQ

1N5241BUR-1

Microchip TechnologyIn Stock: 11101N5241BUR-1 Datasheet

MFR RecommendedRFQ

BZV55C11

Taiwan Semiconductor CorporationIn Stock: 846BZV55C11 Datasheet

MFR RecommendedRFQ

CDLL5241

Microchip TechnologyIn Stock: 1134CDLL5241 Datasheet

MFR RecommendedRFQ

CDLL5241A

Microchip TechnologyIn Stock: 1095CDLL5241A Datasheet

MFR RecommendedRFQ

CDLL5241B

Microchip TechnologyIn Stock: 1177CDLL5241B Datasheet

MFR RecommendedRFQ

TZMC11-M-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1090TZMC11-M-18 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ZMM5241B-7 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Zener (Nominal): 11 V
• Power - Maximum: 500 mW
• Tolerance: ±5% (primary specification)
• Mounting Type: Surface Mount
• Operating Temperature Range: -65°C to 175°C minimum

Package Compatibility: Substitutes must accommodate the Mini MELF surface mount package form factor (DO-213AC, SOD-80) or equivalent surface mount packages that maintain PCB layout compatibility.

Acceptable Variations:

• Impedance (Maximum) may vary within 20–22 Ohms range
• Reverse leakage current specifications may differ while maintaining functional equivalence
• Forward voltage characteristics may vary based on package type and manufacturer design
• Tolerance may be tighter (±5%) but not looser than the original specification

Substitute parts are grouped by package type and active product status to facilitate practical component selection.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Recommended for Direct Replacement):

MMSZ5241B-7-F (Diodes Incorporated) is the preferred substitute when package transition is acceptable. This part maintains identical electrical specifications (11 V, 500 mW, ±5%) and RoHS3 compliance. The SOD-123 package is a standard surface mount form factor with widespread PCB design support. Operating temperature range is -65°C to 150°C, which covers most industrial applications but does not extend to the full 175°C upper limit of the original part. This part is in active production with high inventory availability (32,200 units).

Package-Matched Substitute (Same Form Factor):

BZV55C11 (Taiwan Semiconductor Corporation) and TZMC11-M-18 (Vishay) both maintain the Mini MELF (DO-213AC, SOD-80) package form factor identical to the ZMM5241B-7. Both parts meet the 11 V, 500 mW, ±5% electrical specification and support the full -65°C to 175°C operating temperature range. BZV55C11 is RoHS3 compliant with active product status. TZMC11-M-18 includes AEC-Q101 automotive qualification and is suitable for automotive-grade applications. Both parts have lower reverse leakage current (100 nA) compared to the original specification (2 µA), which represents improved performance.

Alternative Substitutes (Different Package):

1N5241BUR-1 (Microchip Technology) provides electrical equivalence in the DO-213AA package with full temperature range support (-65°C to 175°C). This part is not RoHS3 compliant and has lower inventory availability (1,093 units).

CDLL5241B (Microchip Technology) matches electrical specifications in the DO-213AB MELF package with ±5% tolerance and full temperature range. This part is not RoHS3 compliant but offers active product status.

Compliance Considerations:

For applications requiring RoHS3 compliance, select from MMSZ5241B-7-F, BZV55C11, or TZMC11-M-18. For applications requiring full -65°C to 175°C temperature range with package flexibility, BZV55C11 or TZMC11-M-18 are optimal. For automotive applications, TZMC11-M-18 with AEC-Q101 qualification is specified.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5241B-7-F be used as a direct replacement for ZMM5241B-7?

A: MMSZ5241B-7-F is electrically equivalent with identical voltage (11 V), power (500 mW), and tolerance (±5%) specifications. The primary difference is the package type: SOD-123 versus Mini MELF. PCB layout modification is required to accommodate the different package footprint. Operating temperature range is -65°C to 150°C, which is adequate for most applications but does not extend to 175°C. This part is in active production and is the manufacturer-recommended substitute.

Q: What is the difference between BZV55C11 and TZMC11-M-18?

A: Both parts maintain the Mini MELF package form factor and meet the 11 V, 500 mW, ±5% specification. TZMC11-M-18 includes AEC-Q101 automotive qualification and is designated for automotive-grade applications. BZV55C11 is a general-purpose industrial zener diode. Both parts have identical electrical performance and support the full -65°C to 175°C operating temperature range. Selection depends on application requirements: automotive applications require TZMC11-M-18; general industrial applications may use either part.

Q: Why do some substitutes have lower reverse leakage current?

A: Reverse leakage current specifications vary based on manufacturer design and process technology. BZV55C11 and TZMC11-M-18 specify 100 nanoamperes at 8.2 V, compared to 2 microamperes at 8.4 V for the original part. Lower leakage current represents improved performance and does not affect functional compatibility. Applications designed for the original 2 µA specification will operate correctly with parts exhibiting lower leakage.

Q: Can I use CDLL5241 series parts as substitutes?

A: CDLL5241, CDLL5241A, and CDLL5241B are functionally equivalent in the DO-213AB MELF package. These parts differ in tolerance: CDLL5241 (±20%), CDLL5241A (±10%), and CDLL5241B (±5%). For direct replacement of the ZMM5241B-7, use CDLL5241B to maintain ±5% tolerance. These parts are not RoHS3 compliant. PCB layout modification is required due to package differences.

Q: What is the impact of operating temperature range differences?

A: The ZMM5241B-7 supports -65°C to 175°C. MMSZ5241B-7-F supports -65°C to 150°C. For applications operating above 150°C, MMSZ5241B-7-F is not suitable. BZV55C11 and TZMC11-M-18 support the full -65°C to 175°C range and are appropriate for high-temperature applications. Verify application temperature requirements before selecting a substitute.

Q: Are all substitute parts RoHS3 compliant?

A: No. MMSZ5241B-7-F, BZV55C11, and TZMC11-M-18 are RoHS3 compliant. 1N5241BUR-1, CDLL5241, CDLL5241A, and CDLL5241B are not RoHS3 compliant. For applications requiring RoHS3 compliance, select only from the compliant parts listed above.

Q: What package considerations apply when selecting a substitute?

A: The ZMM5241B-7 uses Mini MELF (DO-213AC, SOD-80) packaging. BZV55C11 and TZMC11-M-18 maintain this package form factor and require no PCB layout changes. MMSZ5241B-7-F uses SOD-123 packaging, requiring PCB footprint modification. CDLL5241 series uses DO-213AB MELF packaging, also requiring layout changes. Verify PCB design compatibility and available board space before selecting a substitute with a different package type.