CLL4684 BK Zener Diode Equivalent & Substitute Parts

Part Overview

The CLL4684 BK is a 3.3 V, 500 mW surface mount zener diode manufactured by Central Semiconductor Corp in SOD-80 (DO-213AC, MINI-MELF) package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production requirements. The part operates across a temperature range of -65°C to 200°C with ±5% voltage tolerance and is suitable for voltage regulation and protection applications in electronic circuits.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	3.3	V
Tolerance	±5%	—
Power - Maximum	500	mW
Current - Reverse Leakage @ Vr	7.5 µA @ 1.5 V	—
Voltage - Forward (Max) @ If	1.5 V @ 100 mA	—
Operating Temperature Range	-65°C to 200°C	—
Mounting Type	Surface Mount	—
Package / Case	SOD-80 (DO-213AC, MINI-MELF)	—

Substitute Part Grouping Explanation

Substitution of the CLL4684 BK is determined by the following critical parameters:

Primary Substitution Criteria:

Zener voltage: 3.3 V nominal
Power dissipation: 500 mW maximum
Voltage tolerance: ±5% or tighter
Package type: SOD-80 (DO-213AC, MINI-MELF) or functionally equivalent surface mount package
Mounting type: Surface mount
Operating temperature range: Minimum -65°C to 150°C or higher

Secondary Compatibility Factors:

Reverse leakage current characteristics
Forward voltage characteristics
RoHS and REACH compliance status
Product status (active preferred for new designs)

Substitute parts are grouped into two categories: direct package equivalents (SOD-80 MiniMELF) and alternative package options (SOD-123). All listed substitutes maintain the 3.3 V zener voltage and 500 mW power rating specifications.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Package	Operating Temp	Product Status	Compliance
CLL4684 BK	Central Semiconductor Corp	3.3 V	±5%	500 mW	SOD-80	-65°C to 200°C	Obsolete	—
CMHZ4684 BK	Central Semiconductor Corp	3.3 V	±5%	500 mW	SOD-123	-65°C to 150°C	Active	REACH Unaffected
TZMB3V3-GS08	Vishay General Semiconductor	3.3 V	±2%	500 mW	SOD-80	-65°C to 175°C	Active	AEC-Q101, ROHS3, REACH Unaffected
TZMB3V3-GS18	Vishay General Semiconductor	3.3 V	±2%	500 mW	SOD-80	-65°C to 175°C	Active	AEC-Q101, ROHS3, REACH Unaffected
TZMC3V3-GS08	Vishay General Semiconductor	3.3 V	±5%	500 mW	SOD-80	-65°C to 175°C	Active	AEC-Q101, ROHS3, REACH Unaffected
TZMC3V3-GS18	Vishay General Semiconductor	3.3 V	±5%	500 mW	SOD-80	-65°C to 175°C	Active	AEC-Q101, ROHS3, REACH Unaffected

Engineering Selection Recommendations

Direct Package Equivalents (SOD-80 MiniMELF):

The Vishay General Semiconductor TZMB3V3-GS08 and TZMB3V3-GS18 provide direct package compatibility with the CLL4684 BK in SOD-80 format. Both parts are active products with AEC-Q101 automotive qualification and ROHS3 compliance. The TZMB series offers improved voltage tolerance (±2% versus ±5%) and lower reverse leakage current (2 µA @ 1 V versus 7.5 µA @ 1.5 V). Operating temperature range extends to 175°C, which is lower than the original part's 200°C maximum but suitable for most applications.

The Vishay TZMC3V3-GS08 and TZMC3V3-GS18 maintain the original ±5% voltage tolerance specification while providing the same package format, active product status, and automotive qualification. These parts are functionally equivalent to the CLL4684 BK with enhanced compliance certifications.

Alternative Package Option (SOD-123):

The Central Semiconductor CMHZ4684 BK provides an active alternative in SOD-123 package format. This part maintains identical electrical specifications (3.3 V, ±5%, 500 mW) and is manufactured by the same supplier as the original part. Package selection between SOD-80 and SOD-123 depends on circuit board layout and design requirements. The operating temperature range is -65°C to 150°C, which is lower than the original specification.

Compliance and Qualification:

All Vishay substitute parts carry AEC-Q101 automotive qualification and ROHS3 compliance, making them suitable for automotive and industrial applications. The Central Semiconductor CMHZ4684 BK is REACH compliant. Selection should prioritize active products with current manufacturing status for long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can TZMB3V3-GS08 and TZMB3V3-GS18 be used interchangeably with CLL4684 BK?

A: Yes. Both parts share identical zener voltage (3.3 V), power rating (500 mW), and SOD-80 package format. The TZMB series offers tighter voltage tolerance (±2%) and lower reverse leakage current. Operating temperature range is -65°C to 175°C, which covers most applications requiring the original -65°C to 200°C range except extreme high-temperature scenarios.

Q: What is the difference between TZMC3V3-GS08 and TZMB3V3-GS08?

A: Both are Vishay products in SOD-80 package with 3.3 V, 500 mW specifications. TZMC3V3-GS08 maintains ±5% voltage tolerance matching the original CLL4684 BK. TZMB3V3-GS08 provides tighter ±2% tolerance and lower reverse leakage current. Selection depends on tolerance requirements for the specific application.

Q: Why is CMHZ4684 BK in SOD-123 package instead of SOD-80?

A: CMHZ4684 BK is an active product from Central Semiconductor Corp with identical electrical specifications to CLL4684 BK but in SOD-123 package format. SOD-123 is a smaller surface mount package suitable for space-constrained designs. Package selection is determined by circuit board layout and design constraints rather than electrical performance.

Q: Are all substitute parts RoHS and REACH compliant?

A: All Vishay substitute parts (TZMB3V3-GS08, TZMB3V3-GS18, TZMC3V3-GS08, TZMC3V3-GS18) are ROHS3 compliant and REACH unaffected. The Central Semiconductor CMHZ4684 BK is REACH compliant. Compliance status should be verified against specific regulatory requirements for the end application.

Q: What is the significance of the -GS08 and -GS18 suffixes in Vishay part numbers?

A: The suffix indicates packaging format. -GS08 denotes Cut Tape (CT) and Digi-Reel packaging, while -GS18 denotes Tape & Reel (TR) packaging. Both formats contain identical components; the difference is in supply format for manufacturing and assembly processes.

Q: Can CLL4684 BK be used in applications requiring AEC-Q101 qualification?

A: No. The CLL4684 BK does not carry AEC-Q101 automotive qualification. For automotive applications requiring AEC-Q101 compliance, use TZMB3V3-GS08, TZMB3V3-GS18, TZMC3V3-GS08, or TZMC3V3-GS18 from Vishay General Semiconductor.

Q: What is the maximum operating temperature difference between CLL4684 BK and its substitutes?

A: The CLL4684 BK operates to 200°C maximum junction temperature. Vishay substitutes operate to 175°C maximum. For applications requiring operation above 175°C, the original CLL4684 BK specification must be maintained if available, or alternative components with higher temperature ratings must be evaluated.

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