CLL4688 BK Zener Diode Equivalent & Substitute Parts

Part Overview

The CLL4688 BK is a 4.7 V, 500 mW Zener diode manufactured by Central Semiconductor Corp in SOD-80 (MINI-MELF) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and production continuity. The part operates across a temperature range of -65°C to 200°C with ±5% voltage tolerance and 10 µA reverse leakage current at 3 V.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	4.7	V
Tolerance	±5%	-
Power - Max	500	mW
Current - Reverse Leakage @ Vr	10	µA @ 3 V
Voltage - Forward (Vf) (Max) @ If	1.5	V @ 100 mA
Operating Temperature	-65 to 200	°C
Mounting Type	Surface Mount	-
Package / Case	DO-213AC, MINI-MELF, SOD-80	-

Substitute Part Grouping Explanation

Substitution of the CLL4688 BK is determined by the following critical parameters:

Primary Substitution Criteria:

Zener voltage: 4.7 V nominal
Power dissipation: 500 mW maximum
Package type: SOD-80 (MINI-MELF, DO-213AC)
Mounting configuration: Surface mount

Secondary Compatibility Factors:

Voltage tolerance (±5% or tighter)
Reverse leakage current characteristics
Forward voltage drop
Operating temperature range
Compliance certifications (RoHS, REACH)

Substitute parts are grouped into two categories based on package configuration and product status:

Category 1: SOD-123 Package Alternative The CMHZ4688 BK provides electrical equivalence with identical voltage and power ratings but uses SOD-123 packaging. This part is active and suitable for designs where package footprint change is acceptable.

Category 2: SOD-80 Package Direct Substitutes Parts from Vishay General Semiconductor (TLZ4V7 series, TZM5230B series, TZMB4V7 series, TZMC4V7 series) maintain the original SOD-80 package format with active product status. These parts offer varying tolerance grades, impedance characteristics, and automotive qualifications.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Package	Vf @ If (V @ mA)	Operating Temp (°C)	Product Status
CLL4688 BK	Central Semiconductor	4.7	±5%	500	SOD-80	1.5 @ 100	-65 to 200	Obsolete
CMHZ4688 BK	Central Semiconductor	4.7	±5%	500	SOD-123	1.5 @ 100	-65 to 150	Active
TLZ4V7-GS08	Vishay	4.7	-	500	SOD-80	1.5 @ 200	-65 to 175	Active
TLZ4V7-GS18	Vishay	4.7	-	500	SOD-80	1.5 @ 200	-65 to 175	Active
TLZ4V7A-GS08	Vishay	4.7	-	500	SOD-80	1.5 @ 200	-65 to 175	Active
TLZ4V7A-GS18	Vishay	4.7	-	500	SOD-80	1.5 @ 200	-65 to 175	Active
TZM5230B-GS08	Vishay	4.7	±5%	500	SOD-80	1.1 @ 200	-65 to 175	Active
TZM5230B-GS18	Vishay	4.7	±5%	500	SOD-80	1.1 @ 200	-65 to 175	Active
TZMB4V7-GS08	Vishay	4.7	±2%	500	SOD-80	1.5 @ 200	-65 to 175	Active
TZMB4V7-GS18	Vishay	4.7	±2%	500	SOD-80	1.5 @ 200	-65 to 175	Active
TZMC4V7-GS08	Vishay	4.7	±5%	500	SOD-80	1.5 @ 200	-65 to 175	Active

Engineering Selection Recommendations

For Direct SOD-80 Package Replacement:

The Vishay TZM5230B-GS08 and TZM5230B-GS18 provide the closest electrical match to the CLL4688 BK with identical 4.7 V nominal voltage, ±5% tolerance, and 500 mW power rating in the original SOD-80 package. Both parts are active with RoHS3 compliance and REACH unaffected status. The TZM5230B series exhibits lower forward voltage (1.1 V @ 200 mA) compared to the original specification (1.5 V @ 100 mA), resulting in reduced power dissipation during forward conduction.

The TZMC4V7-GS08 offers automotive-grade qualification (AEC-Q101) with ±5% tolerance and maintains the SOD-80 package. This part is suitable for applications requiring automotive reliability standards.

The TZMB4V7-GS08 and TZMB4V7-GS18 provide tighter ±2% voltage tolerance with automotive qualification, appropriate for precision voltage regulation applications. These parts feature reduced reverse leakage (500 nA @ 1 V) compared to the original (10 µA @ 3 V).

For Package Format Change:

The CMHZ4688 BK from Central Semiconductor maintains electrical equivalence with identical voltage and power specifications but transitions to SOD-123 packaging. This part is active and suitable for new designs where package footprint modification is acceptable. Operating temperature range is reduced to -65°C to 150°C.

Compliance Considerations:

All recommended Vishay substitutes carry RoHS3 compliance and REACH unaffected status. The TZMB4V7 and TZMC4V7 series include AEC-Q101 automotive qualification, appropriate for automotive and industrial applications requiring enhanced reliability documentation.

Frequently Asked Questions (FAQ)

Q: Can the CLL4688 BK be directly replaced with CMHZ4688 BK?

A: Electrical substitution is valid. Both parts share identical 4.7 V nominal voltage, ±5% tolerance, and 500 mW power rating. The primary difference is package format: CLL4688 BK uses SOD-80 while CMHZ4688 BK uses SOD-123. PCB layout modification is required for package change. Operating temperature range differs: CLL4688 BK operates to 200°C while CMHZ4688 BK operates to 150°C.

Q: What is the difference between TLZ4V7 and TZM5230B series?

A: Both series provide 4.7 V nominal voltage in SOD-80 package. TLZ4V7 series does not specify voltage tolerance in the provided data. TZM5230B series specifies ±5% tolerance matching the original CLL4688 BK. TZM5230B exhibits lower forward voltage (1.1 V @ 200 mA) compared to TLZ4V7 (1.5 V @ 200 mA).

Q: Are TZMB4V7 parts suitable for high-precision applications?

A: TZMB4V7-GS08 and TZMB4V7-GS18 provide ±2% voltage tolerance, tighter than the original CLL4688 BK specification of ±5%. These parts include AEC-Q101 automotive qualification and feature reduced reverse leakage current (500 nA @ 1 V). Tighter tolerance and lower leakage characteristics support precision voltage regulation requirements.

Q: What packaging options are available for SOD-80 substitutes?

A: All Vishay SOD-80 substitutes (TLZ4V7, TZM5230B, TZMB4V7, TZMC4V7 series) use identical DO-213AC, MINI-MELF, SOD-80 package format. Packaging variants differ by tape reel configuration (GS08 and GS18 designations indicate different reel sizes) and cut tape options for TZMC4V7-GS08. PCB footprint compatibility is maintained across all SOD-80 package variants.

Q: Which substitute offers the best reverse leakage performance?

A: TZMB4V7-GS08 and TZMB4V7-GS18 specify 500 nA reverse leakage at 1 V, significantly lower than the original CLL4688 BK specification of 10 µA at 3 V. TZM5230B series specifies 5 µA at 2 V. Lower reverse leakage reduces standby current consumption in voltage regulation circuits.

Q: Are all substitute parts RoHS compliant?

A: All Vishay substitute parts (TLZ4V7, TZM5230B, TZMB4V7, TZMC4V7 series) carry RoHS3 compliance designation. CMHZ4688 BK does not specify RoHS status in the provided data. RoHS compliance is required for applications subject to European Union Restriction of Hazardous Substances regulations.

Q: What is the temperature range limitation for substitutes?

A: The original CLL4688 BK operates from -65°C to 200°C. Vishay SOD-80 substitutes operate from -65°C to 175°C, reducing maximum operating temperature by 25°C. CMHZ4688 BK operates from -65°C to 150°C. Applications requiring operation above 175°C cannot use the listed Vishay substitutes.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message