CLL5227B TR Equivalent & Substitute Parts

Part Overview

The CLL5227B TR is a Zener diode rated at 3.6 V, 500 mW, manufactured by Central Semiconductor Corp in SOD-80 (DO-213AC MINI-MELF) surface mount package. This part is classified as obsolete, making substitute components necessary for new designs and ongoing production requirements. The CLL5227B TR operates across a temperature range of -65°C to 200°C with ±5% voltage tolerance and 24 Ohms maximum impedance. Equivalent alternatives are available from Vishay General Semiconductor - Diodes Division with active product status and enhanced compliance certifications.

Key Parameters

Parameter	CLL5227B TR	Unit
Voltage - Zener (Nom)	3.6	V
Tolerance	±5%	-
Power - Max	500	mW
Impedance (Max)	24	Ohms
Current - Reverse Leakage @ Vr	15	µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	1.25	V @ 200 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 CLL5227B TR is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

Zener voltage: 3.6 V nominal
Power dissipation: 500 mW maximum
Package type: SOD-80 (DO-213AC MINI-MELF) surface mount
Mounting configuration: Surface mount

Secondary Compatibility Parameters:

Impedance characteristics (Zzt)
Reverse leakage current specifications
Forward voltage drop characteristics
Operating temperature range coverage

Substitute parts are grouped into two categories based on tolerance and impedance specifications:

Category 1: TLZ Series (Vishay) - Standard Tolerance TLZ3V6-GS08 and TLZ3V6-GS18 provide 3.6 V, 500 mW operation with 60 Ohms impedance and active product status. These parts operate to -65°C to 175°C.

Category 2: TZM Series (Vishay) - Precision & Automotive Grade TZM5227B-GS08, TZM5227B-GS18, TZMC3V6-GS08, TZMB3V6-GS08, and TZMB3V6-GS18 provide enhanced specifications with ±5% or ±2% tolerance, lower reverse leakage, and automotive qualification (AEC-Q101). These parts operate to -65°C to 175°C or 175°C maximum.

All substitute parts maintain SOD-80 package compatibility and surface mount configuration identical to the original CLL5227B TR.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Vf @ 200mA (V)	Ir @ 1V (µA)	Temp Range (°C)	Status	RoHS
CLL5227B TR	Central Semiconductor	3.6	±5%	500	24	1.25	15	-65 to 200	Obsolete	-
TLZ3V6-GS08	Vishay	3.6	-	500	60	1.5	-	-65 to 175	Active	ROHS3
TLZ3V6-GS18	Vishay	3.6	-	500	60	1.5	-	-65 to 175	Active	ROHS3
TLZ3V6A-GS08	Vishay	3.6	-	500	60	1.5	5	-65 to 175	Active	ROHS3
TLZ3V6A-GS18	Vishay	3.6	-	500	60	1.5	5	-65 to 175	Active	ROHS3
TLZ3V6B-GS08	Vishay	3.6	-	500	60	1.5	5	-65 to 175	Active	ROHS3
TZM5227B-GS08	Vishay	3.6	±5%	500	24	1.1	15	-65 to 175	Active	ROHS3
TZM5227B-GS18	Vishay	3.6	±5%	500	24	1.1	15	-65 to 175	Active	ROHS3
TZMC3V6-GS08	Vishay	3.6	±5%	500	90	1.5	2	-65 to 175	Active	ROHS3
TZMB3V6-GS08	Vishay	3.6	±2%	500	90	1.5	2	-65 to 175	Active	ROHS3
TZMB3V6-GS18	Vishay	3.6	±2%	500	90	1.5	2	-65 to 175	Active	ROHS3

Engineering Selection Recommendations

Direct Replacement - Matched Impedance:

TZM5227B-GS08 and TZM5227B-GS18 provide the closest electrical match to CLL5227B TR. Both parts maintain 24 Ohms impedance, ±5% tolerance, 15 µA reverse leakage, and identical 3.6 V / 500 mW ratings. These Vishay parts carry active product status, ROHS3 compliance, and are available in high inventory quantities (22,900 and 623 units respectively). Operating temperature range extends to 175°C maximum, which covers the lower end of the original -65°C to 200°C specification.

Automotive-Grade Alternative:

TZMB3V6-GS08 and TZMB3V6-GS18 offer enhanced specifications with ±2% tolerance, AEC-Q101 automotive qualification, and reduced reverse leakage (2 µA). These parts feature 90 Ohms impedance and are suitable for applications requiring automotive-grade reliability. Inventory availability is substantial (20,100 and 794 units).

Standard Industrial Alternative:

TLZ3V6-GS08 and TLZ3V6-GS18 provide basic functional equivalence with 60 Ohms impedance and active product status. These parts are suitable for general-purpose applications where impedance variation is acceptable. Inventory levels are adequate (1,054 and 927 units).

All substitute parts are packaged in SOD-80 (DO-213AC MINI-MELF) surface mount configuration, ensuring mechanical compatibility with existing PCB layouts designed for CLL5227B TR.

Frequently Asked Questions (FAQ)

Q: Can TZM5227B-GS08 directly replace CLL5227B TR in existing designs?

A: Yes. TZM5227B-GS08 maintains identical electrical specifications: 3.6 V nominal voltage, ±5% tolerance, 500 mW power rating, 24 Ohms impedance, and 15 µA reverse leakage. Both use SOD-80 surface mount packaging. The primary difference is operating temperature range: TZM5227B-GS08 operates to 175°C maximum versus CLL5227B TR's 200°C maximum. Verify application temperature requirements before selection.

Q: What is the difference between TZM5227B and TZMC3V6 series?

A: Both are 3.6 V, 500 mW Zener diodes in SOD-80 packages. TZM5227B-GS08/GS18 feature 24 Ohms impedance and ±5% tolerance, matching the original CLL5227B TR impedance characteristics. TZMC3V6-GS08 features 90 Ohms impedance with ±5% tolerance and lower reverse leakage (2 µA versus 15 µA). Select TZM5227B for impedance-critical applications; select TZMC3V6 for applications requiring lower leakage current.

Q: Are TZMB3V6 parts suitable for non-automotive applications?

A: Yes. TZMB3V6-GS08 and TZMB3V6-GS18 are automotive-qualified (AEC-Q101) but function in any application. These parts offer superior specifications: ±2% tolerance, 2 µA reverse leakage, and 90 Ohms impedance. Use in applications requiring tighter voltage tolerance and lower leakage performance.

Q: What packaging options are available for substitutes?

A: All substitute parts are supplied in SOD-80 (DO-213AC MINI-MELF) surface mount package, identical to CLL5227B TR. Tape & Reel (TR) packaging is standard for all listed alternatives, suitable for automated assembly processes.

Q: How do impedance differences affect circuit performance?

A: Impedance (Zzt) affects dynamic resistance and voltage regulation characteristics. CLL5227B TR and TZM5227B series feature 24 Ohms impedance. TLZ3V6 series feature 60 Ohms; TZMC3V6 and TZMB3V6 series feature 90 Ohms. Higher impedance results in greater voltage variation under load current changes. Select impedance based on circuit regulation requirements and load conditions.

Q: What is the significance of reverse leakage current specifications?

A: Reverse leakage current (Ir) determines standby power consumption and circuit stability. CLL5227B TR specifies 15 µA @ 1 V. TLZ3V6A/B variants specify 5 µA; TZMC3V6 and TZMB3V6 specify 2 µA. Lower leakage reduces power dissipation in standby conditions and improves circuit stability. Select based on application power budget and performance requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All Vishay substitute parts carry ROHS3 compliance certification. CLL5227B TR status is not specified. All parts are REACH unaffected and carry EAR99 ECCN classification.

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