CLL4687 TR Equivalent & Substitute Parts

Part Overview

The CLL4687 TR is a Zener diode rated at 4.3 V nominal with 500 mW power dissipation, manufactured by Central Semiconductor Corp in the SOD-80 (DO-213AC, MINI-MELF) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement.

Zener diodes in this voltage and power class are used for voltage regulation, overvoltage protection, and reference applications in electronic circuits. The transition from the obsolete CLL4687 TR to active alternatives requires verification of electrical parameter compatibility and package equivalence.

Key Parameters

Parameter	CLL4687 TR	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 to 200	°C
Mounting Type	Surface Mount	-
Package / Case	DO-213AC, MINI-MELF, SOD-80	-
Product Status	Obsolete	-

Substitute Part Grouping Explanation

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

Primary Matching Criteria:

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

Secondary Compatibility Factors:

Tolerance: ±5% or tighter
Operating Temperature Range: Minimum -65°C to +175°C or higher
Voltage - Forward (Vf): Maximum 1.5 V or lower at specified current
Current - Reverse Leakage: Specified at rated voltage

All identified substitute parts meet the primary matching criteria. Variations in impedance, reverse leakage current specifications, and operating temperature upper limits exist among substitutes and are documented in the parameter comparison table.

Parameter Comparison

Parameter	CLL4687 TR	TLZ4V3-GS08	TLZ4V3-GS18	TZM5229B-GS08	TZM5229B-GS18	TZMB4V3-GS08	Unit
Voltage - Zener (Nom)	4.3	4.3	4.3	4.3	4.3	4.3	V
Tolerance	±5%	-	-	±5%	±5%	±2%	-
Power - Max	500	500	500	500	500	500	mW
Impedance (Max) (Zzt)	-	40	40	22	22	90	Ohms
Voltage - Forward (Vf) (Max) @ If	1.5 @ 100 mA	1.5 @ 200 mA	1.5 @ 200 mA	1.1 @ 200 mA	1.1 @ 200 mA	1.5 @ 200 mA	V @ mA
Operating Temperature	-65 to 200	-65 to 175	-65 to 175	-65 to 175	-65 to 175	-65 to 175	°C
Package / Case	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	-
Product Status	Obsolete	Active	Active	Active	Active	Active	-
RoHS Status	-	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	-
Qualification	-	-	-	-	-	AEC-Q101	-

Engineering Selection Recommendations

For General Applications:

TLZ4V3-GS08 and TLZ4V3-GS18 are direct functional equivalents with active product status. Both parts maintain the 4.3 V nominal voltage and 500 mW power rating with identical forward voltage characteristics. The primary distinction between these two variants is packaging configuration (GS08 and GS18 denote different tape reel specifications). Both are ROHS3 compliant and carry unlimited moisture sensitivity level (MSL 1).

For Applications Requiring Tighter Tolerance:

TZMB4V3-GS08 provides ±2% voltage tolerance compared to the ±5% specification of the CLL4687 TR. This part carries AEC-Q101 automotive qualification and is suitable for applications requiring enhanced voltage accuracy. The higher impedance specification (90 Ohms maximum) should be evaluated against circuit requirements.

For Applications with Optimized Leakage Performance:

TZM5229B-GS08 and TZM5229B-GS18 offer lower reverse leakage current (5 µA @ 1 V) and reduced forward voltage (1.1 V @ 200 mA) compared to the original specification. These variants provide improved efficiency in voltage regulation circuits. The lower impedance (22 Ohms maximum) supports applications with tighter load regulation requirements.

All substitute parts are ROHS3 compliant and carry MSL 1 rating. Operating temperature range is reduced to -65°C to +175°C across all substitutes, compared to the original -65°C to +200°C specification. Applications requiring operation above 175°C require design review.

Frequently Asked Questions (FAQ)

Q: Can TLZ4V3-GS08 and TLZ4V3-GS18 be used interchangeably with CLL4687 TR?

A: Yes. Both parts share identical electrical specifications for voltage (4.3 V nominal), power rating (500 mW), forward voltage (1.5 V @ 200 mA), and package configuration (SOD-80). The GS08 and GS18 designations refer to tape reel specifications and do not affect electrical performance. Both are active products with ROHS3 compliance.

Q: What is the difference between TZM5229B variants and TLZ4V3 variants?

A: TZM5229B parts feature lower forward voltage (1.1 V @ 200 mA versus 1.5 V @ 200 mA) and lower impedance (22 Ohms versus 40 Ohms). These characteristics result in improved efficiency and tighter load regulation. Both maintain the 4.3 V nominal voltage and 500 mW power rating. Selection depends on circuit requirements for forward voltage drop and impedance characteristics.

Q: Is TZMB4V3-GS08 suitable for automotive applications?

A: TZMB4V3-GS08 carries AEC-Q101 automotive qualification and ±2% voltage tolerance, making it suitable for automotive-grade applications. This part is recommended when automotive qualification is a design requirement. The tighter tolerance specification supports applications requiring enhanced voltage accuracy.

Q: What is the impact of the reduced operating temperature range on substitute parts?

A: All substitute parts specify a maximum operating temperature of 175°C, compared to the original CLL4687 TR specification of 200°C. Applications requiring operation above 175°C must retain the original part or identify alternative solutions. For applications operating within -65°C to +175°C, substitute parts are fully compatible.

Q: Are all substitute parts available in the same package configuration?

A: Yes. All substitute parts are supplied in DO-213AC, MINI-MELF, SOD-80 package configuration, identical to the CLL4687 TR. Surface mount assembly compatibility is maintained across all substitutes.

Q: What does the GS08 and GS18 designation indicate?

A: GS08 and GS18 designations specify different tape reel configurations for surface mount assembly. GS08 and GS18 represent different reel sizes and tape specifications used in automated pick-and-place equipment. Electrical performance is identical between these variants. Selection is based on assembly equipment compatibility and procurement requirements.

Q: Can TZM5229B-GS08 and TZM5229B-GS18 be used interchangeably?

A: Yes. Both parts are electrically identical. The GS08 and GS18 designations refer only to tape reel specifications. Selection between these variants is determined by assembly equipment requirements and procurement preferences.

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