MMSZ4698T1 Zener Diode Equivalent & Substitute Parts

Part Overview

The MMSZ4698T1 is an 11 V, 500 mW Zener diode manufactured by onsemi in SOD-123 surface mount packaging. This component is classified as obsolete, indicating discontinued production status. The part operates across a temperature range of -55°C to 120°C with ±5% voltage tolerance and exhibits reverse leakage current of 50 nA at 8.4 V. Due to its obsolete status, equivalent and substitute parts are necessary for ongoing design support, production continuity, and system maintenance applications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	11	V
Tolerance	±5	%
Power - Max	500	mW
Current - Reverse Leakage @ Vr	50 nA @ 8.4 V	nA
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	mV
Operating Temperature	-55°C ~ 120°C	°C
Mounting Type	Surface Mount	—
Package / Case	SOD-123	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution of the MMSZ4698T1 is determined by the following critical parameters: nominal Zener voltage (11 V), voltage tolerance (±5%), maximum power dissipation capability, reverse leakage current characteristics, forward voltage drop, operating temperature range, and package form factor.

Substitute parts are grouped into two categories:

Direct Equivalents maintain identical electrical specifications and package type (SOD-123), differing only in manufacturer, product status, or packaging format (tube versus tape & reel).

Similar Alternatives share the same nominal Zener voltage (11 V) and tolerance (±5%) but differ in one or more of the following: maximum power rating, package type (SOD-123F or SOD-323), reverse leakage current, forward voltage characteristics, or operating temperature range. These parts are suitable for applications where the specific parameter differences do not conflict with circuit requirements.

Parameter Comparison

Parameter	MMSZ4698T1	MMSZ4698T1G	MMSZ4698-TP	BZT52H-C11,115	PZU11BA,115
Manufacturer	onsemi	onsemi	Micro Commercial Co	Nexperia USA Inc.	Nexperia USA Inc.
Voltage - Zener (Nom)	11 V	11 V	11 V	11 V	11 V
Tolerance	±5%	±5%	±5%	±5%	±5%
Power - Max	500 mW	500 mW	500 mW	375 mW	320 mW
Current - Reverse Leakage @ Vr	50 nA @ 8.4 V	50 nA @ 8.4 V	50 nA @ 8.4 V	100 nA @ 8 V	100 nA @ 8 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	950 mV @ 10 mA	900 mV @ 10 mA	1.1 V @ 100 mA
Operating Temperature	-55°C ~ 120°C	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C
Package / Case	SOD-123	SOD-123	SOD-123	SOD-123F	SOD-323
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MMSZ4698T1G is the primary direct equivalent. This onsemi part maintains identical electrical specifications (11 V, 500 mW, ±5% tolerance, 50 nA reverse leakage) and SOD-123 package form factor. The extended operating temperature range (-55°C to 150°C versus -55°C to 120°C) provides additional thermal margin. ROHS3 compliance status addresses regulatory requirements absent in the obsolete MMSZ4698T1. This part is recommended for direct replacement in existing designs with no circuit modifications required.

MMSZ4698-TP is a direct equivalent manufactured by Micro Commercial Co. Electrical specifications match the original part identically. Forward voltage is specified at 950 mV versus 900 mV, representing a 50 mV maximum difference within acceptable engineering tolerance. Extended temperature range and ROHS3 compliance are provided. This part is suitable for applications where manufacturer diversification is acceptable.

BZT52H-C11,115 is a similar alternative with reduced power rating (375 mW versus 500 mW). This part is appropriate for applications where power dissipation does not exceed 375 mW. The SOD-123F package differs from SOD-123, requiring PCB layout verification. Automotive qualification (AEC-Q101) and extended temperature range (-65°C to 150°C) provide additional environmental robustness. Reverse leakage current is doubled (100 nA), which may impact precision applications.

PZU11BA,115 is a similar alternative with the lowest power rating (320 mW) and smallest package (SOD-323). This part is suitable only for low-power applications. The forward voltage specification at 1.1 V @ 100 mA differs significantly from the original part's 900 mV @ 10 mA, reflecting different measurement conditions. Package change requires PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can MMSZ4698T1G directly replace MMSZ4698T1 without circuit modifications?

A: Yes. MMSZ4698T1G maintains identical electrical specifications (11 V nominal, 500 mW power, ±5% tolerance, 50 nA reverse leakage) and SOD-123 package form factor. The extended operating temperature range provides additional margin. No circuit modifications are required.

Q: What is the primary difference between MMSZ4698T1 and MMSZ4698-TP?

A: Both parts share identical nominal specifications. The manufacturer differs (onsemi versus Micro Commercial Co). Forward voltage is specified at 950 mV for MMSZ4698-TP versus 900 mV for MMSZ4698T1, a 50 mV maximum difference. Both operate across -55°C to 150°C and are ROHS3 compliant.

Q: Can BZT52H-C11,115 be used in place of MMSZ4698T1?

A: BZT52H-C11,115 is suitable only if circuit power dissipation does not exceed 375 mW. The original part is rated for 500 mW. The package differs (SOD-123F versus SOD-123), requiring PCB layout verification. Reverse leakage current is doubled (100 nA versus 50 nA). Applications requiring the full 500 mW rating or lower leakage current should not use this substitute.

Q: What are the package differences between SOD-123, SOD-123F, and SOD-323?

A: SOD-123 and SOD-123F are similar form factors with minor dimensional differences; SOD-123F is slightly larger. SOD-323 is significantly smaller. Package changes require PCB footprint redesign and layout verification. Thermal performance may differ due to package size variations.

Q: Is MMSZ4698T1 suitable for new designs?

A: No. MMSZ4698T1 is classified as obsolete. New designs should specify MMSZ4698T1G or MMSZ4698-TP, both of which are active products with ROHS3 compliance and extended temperature ranges.

Q: How does reverse leakage current affect circuit performance?

A: Reverse leakage current determines the Zener diode's off-state behavior. MMSZ4698T1, MMSZ4698T1G, and MMSZ4698-TP specify 50 nA at 8.4 V. BZT52H-C11,115 and PZU11BA,115 specify 100 nA at 8 V. Higher leakage current increases power consumption in standby conditions and may affect precision voltage regulation circuits. Applications sensitive to leakage should use parts with lower specified values.

Q: Can PZU11BA,115 be used in high-power applications?

A: No. PZU11BA,115 is rated for 320 mW maximum power dissipation, the lowest among all listed parts. This part is suitable only for low-power applications. Applications requiring 500 mW dissipation capability must use MMSZ4698T1G or MMSZ4698-TP.

Q: What does ROHS3 compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. MMSZ4698T1 is RoHS non-compliant. All substitute parts listed are ROHS3 compliant, meeting current regulatory requirements for commercial and industrial applications.

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