CLL4687 BK Equivalent & Substitute Parts

Part Overview

The CLL4687 BK is a Zener diode manufactured by Central Semiconductor Corp, rated at 4.3 V nominal with 500 mW power dissipation in a SOD-80 (DO-213AC, 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. Substitute parts must maintain electrical compatibility across voltage regulation, power handling, and thermal operating ranges while accommodating available packaging options.

Key Parameters

Parameter	CLL4687 BK	Unit
Voltage - Zener (Nom)	4.3	V
Tolerance	±5%	-
Power - Max	500	mW
Current - Reverse Leakage @ Vr	4 µA @ 2 V	-
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 100 mA	-
Operating Temperature	-65°C ~ 200°C	-
Mounting Type	Surface Mount	-
Package / Case	SOD-80, DO-213AC, MINI-MELF	-

Substitute Part Grouping Explanation

Substitution of the CLL4687 BK is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - Zener (Nom): 4.3 V
Power - Max: 500 mW
Mounting Type: Surface Mount
Package / Case: SOD-80 (DO-213AC, MINI-MELF) or compatible surface mount package

Acceptable Variations:

Tolerance: ±5% or tighter (±2%)
Operating Temperature: Minimum -65°C to maximum ≥150°C
Forward Voltage (Vf): ≤1.5 V @ ≥100 mA
Reverse Leakage Current: ≤5 µA

Substitute parts are grouped into two categories:

Category 1: SOD-80 Package (Direct Package Match) Parts maintaining the SOD-80 (MINI-MELF) package format with identical electrical specifications. These include TLZ4V3-GS08, TLZ4V3-GS18, TZM5229B-GS08, TZM5229B-GS18, and TZMB4V3-GS08.

Category 2: Alternative Surface Mount Package (SOD-123) The CMHZ4687 BK provides electrical equivalence in an alternative surface mount package (SOD-123) with reduced maximum operating temperature (150°C vs. 200°C).

Parameter Comparison

Parameter	CLL4687 BK	CMHZ4687 BK	TLZ4V3-GS08	TLZ4V3-GS18	TZM5229B-GS08	TZM5229B-GS18	TZMB4V3-GS08
Manufacturer	Central Semiconductor Corp	Central Semiconductor Corp	Vishay	Vishay	Vishay	Vishay	Vishay
Voltage - Zener (Nom)	4.3 V	4.3 V	4.3 V	4.3 V	4.3 V	4.3 V	4.3 V
Tolerance	±5%	±5%	-	-	±5%	±5%	±2%
Power - Max	500 mW	500 mW	500 mW	500 mW	500 mW	500 mW	500 mW
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 100 mA	1.5 V @ 100 mA	1.5 V @ 200 mA	1.5 V @ 200 mA	1.1 V @ 200 mA	1.1 V @ 200 mA	1.5 V @ 200 mA
Operating Temperature	-65°C ~ 200°C	-65°C ~ 150°C	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C
Package / Case	SOD-80	SOD-123	SOD-80	SOD-80	SOD-80	SOD-80	SOD-80
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	-	-	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Qualification	-	-	-	-	-	-	AEC-Q101

Engineering Selection Recommendations

For Direct SOD-80 Package Replacement (Preferred):

The TZM5229B-GS08 and TZM5229B-GS18 are recommended as primary substitutes. Both parts maintain the SOD-80 package format, deliver 4.3 V nominal zener voltage with ±5% tolerance, and support 500 mW power dissipation. These Vishay components are active products with ROHS3 compliance and REACH unaffected status. The TZM5229B series offers improved forward voltage characteristics (1.1 V @ 200 mA) compared to the original specification, reducing power dissipation in forward-biased applications.

The TLZ4V3-GS08 and TLZ4V3-GS18 provide equivalent electrical performance in the SOD-80 package with active product status and ROHS3 compliance. Operating temperature range extends to 175°C, which is acceptable for most applications requiring the original 200°C maximum rating.

The TZMB4V3-GS08 is suitable for automotive applications requiring AEC-Q101 qualification. This part features tighter tolerance (±2%), lower reverse leakage current (1 µA @ 1 V), and automotive-grade qualification, making it appropriate for regulated automotive environments.

For Alternative Package Requirement (SOD-123):

The CMHZ4687 BK provides electrical equivalence in SOD-123 surface mount packaging. This part is active and maintains 4.3 V nominal voltage with ±5% tolerance and 500 mW power rating. The maximum operating temperature is 150°C, which represents a reduction from the original 200°C specification and must be evaluated against application thermal requirements.

Product Status Consideration:

All recommended substitutes are active products, ensuring long-term availability and supply chain continuity. The original CLL4687 BK is obsolete and should not be specified for new designs.

Frequently Asked Questions (FAQ)

Q: Can the CLL4687 BK be directly replaced with any of the substitute parts?

A: Yes, for applications using the SOD-80 package. The TZM5229B-GS08, TZM5229B-GS18, TLZ4V3-GS08, and TLZ4V3-GS18 are direct electrical and mechanical equivalents. The CMHZ4687 BK is electrically equivalent but uses the SOD-123 package, requiring PCB layout modification. The TZMB4V3-GS08 is suitable for automotive applications with AEC-Q101 requirements.

Q: What is the primary difference between SOD-80 and SOD-123 packages?

A: SOD-80 (MINI-MELF) and SOD-123 are both surface mount packages but differ in physical dimensions and footprint. SOD-80 is larger than SOD-123. Substitution between these packages requires PCB redesign. The CLL4687 BK uses SOD-80; the CMHZ4687 BK uses SOD-123.

Q: Are all substitute parts RoHS compliant?

A: Yes. All active substitute parts (CMHZ4687 BK, TLZ4V3-GS08, TLZ4V3-GS18, TZM5229B-GS08, TZM5229B-GS18, and TZMB4V3-GS08) are ROHS3 compliant and REACH unaffected.

Q: What is the significance of the ±2% tolerance in the TZMB4V3-GS08?

A: The TZMB4V3-GS08 offers tighter tolerance (±2%) compared to the original CLL4687 BK (±5%). This provides more precise zener voltage regulation, beneficial in applications requiring strict voltage control. The tighter tolerance is an improvement over the original specification.

Q: Can the TZMB4V3-GS08 be used in non-automotive applications?

A: Yes. The TZMB4V3-GS08 is qualified to AEC-Q101 automotive standards but is suitable for any application. Its automotive qualification indicates enhanced reliability and quality assurance, making it appropriate for general industrial and consumer applications as well.

Q: What is the impact of reduced operating temperature range in the CMHZ4687 BK?

A: The CMHZ4687 BK maximum operating temperature is 150°C compared to the original 200°C. Applications operating above 150°C junction temperature require alternative substitutes (TLZ4V3 or TZM5229B series, rated to 175°C). For applications with maximum junction temperatures below 150°C, the CMHZ4687 BK is fully compatible.

Q: Are the TZM5229B-GS08 and TZM5229B-GS18 interchangeable?

A: Yes. Both parts are electrically identical with 4.3 V nominal voltage, ±5% tolerance, and 500 mW power rating in SOD-80 packaging. The designation suffix (-GS08 vs. -GS18) indicates different tape and reel configurations for automated assembly. Selection depends on packaging and supply chain requirements, not electrical performance.

Q: What does "Impedance (Max) (Zzt)" indicate in the substitute parts?

A: Impedance (Zzt) is the dynamic impedance of the zener diode in the reverse-biased region. Lower impedance values (TZM5229B series at 22 Ohms) indicate better voltage regulation characteristics compared to higher impedance values (TZMB4V3-GS08 at 90 Ohms). This parameter affects voltage stability under load variations.

Q: Is the forward voltage difference between substitutes significant?

A: The TZM5229B series offers lower forward voltage (1.1 V @ 200 mA) compared to the original specification (1.5 V @ 100 mA). This represents improved efficiency in forward-biased operation, reducing power dissipation. For applications where the diode operates primarily in reverse bias (zener regulation mode), this difference is not significant.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message