CLL5246B TR PBFREE Zener Diode 16V 500mW Equivalent & Substitute Parts

Part Overview

The CLL5246B TR PBFREE is a 16 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 Active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified based on matching electrical specifications including nominal zener voltage, power dissipation rating, and package configuration. Alternative components from Vishay General Semiconductor - Diodes Division provide equivalent functional performance within the specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	16	V
Tolerance	±5%	-
Power - Max	500	mW
Impedance (Max)	17	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 12 V
Voltage - Forward (Vf) (Max) @ If	1.25	V @ 200 mA
Operating Temperature Range	-65 to 200	°C
Package / Case	DO-213AC, MINI-MELF, SOD-80	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the CLL5246B TR PBFREE is determined by the following critical parameters:

Primary Matching Criteria:

Nominal zener voltage: 16 V
Maximum power dissipation: 500 mW
Package type: SOD-80 (DO-213AC, MINI-MELF)
Mounting configuration: Surface Mount
RoHS3 compliance status

Secondary Compatibility Parameters:

Voltage tolerance (±5% or tighter)
Impedance characteristics (Zzt)
Reverse leakage current specifications
Forward voltage characteristics
Operating temperature range overlap

All identified substitute parts maintain the core electrical specifications (16 V nominal, 500 mW power rating) and physical package compatibility. Variations in impedance, tolerance grades, and temperature ratings reflect different application requirements within automotive and industrial segments.

Parameter Comparison

Parameter	CLL5246B TR PBFREE	TLZ16A-GS08	TZM5246B-GS08	TZMB16-GS08	TZMB16-GS18	TZMC16-GS08	TZMC16-GS18
Manufacturer	Central Semiconductor Corp	Vishay General Semiconductor	Vishay General Semiconductor	Vishay General Semiconductor	Vishay General Semiconductor	Vishay General Semiconductor	Vishay General Semiconductor
Voltage - Zener (Nom)	16 V	16 V	16 V	16 V	16 V	16 V	16 V
Tolerance	±5%	-	±5%	±2%	±2%	±5%	±5%
Power - Max	500 mW	500 mW	500 mW	500 mW	500 mW	500 mW	500 mW
Impedance (Max)	17 Ohms	18 Ohms	17 Ohms	40 Ohms	40 Ohms	40 Ohms	40 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 12 V	40 nA @ 14.1 V	100 nA @ 12 V	100 nA @ 12 V	100 nA @ 12 V	100 nA @ 12 V	100 nA @ 12 V
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 200 mA	1.5 V @ 200 mA	1.1 V @ 200 mA	1.5 V @ 200 mA	1.5 V @ 200 mA	1.5 V @ 200 mA	1.5 V @ 200 mA
Operating Temperature Range	-65 to 200°C	-65 to 175°C	175°C	175°C	175°C	175°C	-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	DO-213AC, MINI-MELF, SOD-80
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Direct Functional Equivalents (Highest Compatibility):

TZM5246B-GS08 and TZMC16-GS08 provide the closest electrical match to CLL5246B TR PBFREE, maintaining identical impedance (17 Ohms and 40 Ohms respectively), ±5% tolerance, and 100 nA reverse leakage specifications. Both are RoHS3 compliant and REACH unaffected. TZM5246B-GS08 offers superior forward voltage performance (1.1 V vs. 1.25 V @ 200 mA).

Automotive-Grade Alternatives:

TZMB16-GS08, TZMB16-GS18, TZMC16-GS08, and TZMC16-GS18 incorporate AEC-Q101 automotive qualification and Automotive grade designation. These components feature ±2% or ±5% tolerance with 40 Ohms impedance. TZMC16-GS18 provides the largest inventory availability (729,800 pcs) and extended temperature range (-65 to 175°C).

General-Purpose Substitute:

TLZ16A-GS08 from Vishay TLZ series operates within compatible parameters with 18 Ohms impedance and superior reverse leakage performance (40 nA @ 14.1 V). Operating temperature range extends to -65 to 175°C. This option suits applications where lower leakage current is beneficial.

Compliance Verification:

All substitute parts maintain RoHS3 compliance, REACH unaffected status, and Moisture Sensitivity Level 1 (Unlimited). Selection should account for application-specific temperature requirements, as CLL5246B TR PBFREE supports -65 to 200°C operation, while most Vishay alternatives are rated to 175°C maximum.

Frequently Asked Questions (FAQ)

Q: Can TZMC16-GS18 directly replace CLL5246B TR PBFREE in all applications?

A: TZMC16-GS18 maintains electrical equivalence at 16 V nominal, 500 mW power rating, and SOD-80 package. However, the operating temperature range differs: CLL5246B TR PBFREE supports -65 to 200°C, while TZMC16-GS18 is rated -65 to 175°C. Applications requiring operation above 175°C require the original part or verification of thermal requirements.

Q: What is the significance of impedance variation between 17 Ohms and 40 Ohms?

A: Impedance (Zzt) affects dynamic response characteristics in transient suppression and voltage regulation circuits. Lower impedance (17 Ohms) provides faster response to voltage transients. Higher impedance (40 Ohms) is typical of automotive-grade components. Selection depends on circuit requirements; both values are acceptable for standard zener diode applications at 16 V, 500 mW.

Q: Are all substitute parts available in identical packaging configurations?

A: All listed substitutes use SOD-80 (DO-213AC, MINI-MELF) package for surface mount assembly. Packaging variants differ: CLL5246B TR PBFREE and most Vishay parts are supplied in Tape & Reel (TR). TZMB16-GS08 is available in Cut Tape (CT) & Digi-Reel®, and TZMC16-GS18 in Cut Tape (CT). Verify packaging compatibility with assembly equipment before procurement.

Q: What is the difference between ±5% and ±2% tolerance specifications?

A: Tolerance defines the acceptable deviation from nominal 16 V zener voltage. ±5% tolerance allows 15.2 V to 16.8 V operation range. ±2% tolerance restricts range to 15.68 V to 16.32 V. Applications requiring tighter voltage regulation benefit from ±2% parts (TZMB16-GS08, TZMB16-GS18). Standard applications accept ±5% tolerance.

Q: Why do some substitutes have incomplete operating temperature specifications?

A: TZM5246B-GS08 lists only maximum temperature (175°C) without minimum specification in provided data. This represents incomplete datasheet information. For applications requiring full temperature range confirmation, contact manufacturer documentation or request complete specifications from component suppliers.

Q: Is automotive qualification (AEC-Q101) required for non-automotive applications?

A: AEC-Q101 qualification indicates automotive-grade reliability testing and is not mandatory for industrial or consumer applications. However, automotive-qualified parts (TZMB16-GS08, TZMB16-GS18, TZMC16-GS08, TZMC16-GS18) provide additional quality assurance. Selection based on application requirements rather than qualification status.

Q: How does reverse leakage current affect circuit performance?

A: Reverse leakage current (specified at 100 nA @ 12 V for most parts, 40 nA @ 14.1 V for TLZ16A-GS08) represents DC current flow in reverse bias condition. Lower leakage reduces standby power consumption and improves voltage regulation stability. TLZ16A-GS08 with 40 nA leakage suits low-power applications; standard 100 nA leakage is acceptable for most circuits.

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