CLL5231B TR Equivalent & Substitute Parts

Part Overview

The CLL5231B TR is a Zener diode rated at 5.1 V nominal with 500 mW power dissipation in a surface mount SOD-80 (DO-213AC, MINI-MELF) package. Manufactured by Central Semiconductor Corp, this component is classified as obsolete. Due to its obsolete status and limited availability, equivalent substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute components must maintain electrical compatibility across voltage regulation, power handling, and thermal operating ranges while conforming to the same physical package specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	5.1	V
Tolerance	±5%	-
Power - Max	500	mW
Impedance (Max)	17	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 2 V
Voltage - Forward (Vf) (Max) @ If	1.25	V @ 200 mA
Operating Temperature Range	-65 to 200	°C
Mounting Type	Surface Mount	-
Package / Case	DO-213AC, MINI-MELF, SOD-80	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the CLL5231B TR is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Zener voltage: 5.1 V nominal
Power dissipation: 500 mW maximum
Package type: SOD-80 (DO-213AC, MINI-MELF) surface mount

Mechanical Compatibility:

Identical package footprint and lead configuration
Surface mount assembly compatibility

Operational Compatibility:

Operating temperature range must encompass or match the application requirements
Reverse leakage and forward voltage characteristics must be within acceptable circuit tolerances

The three substitute parts listed (TLZ5V1B-GS08, TLZ5V1B-GS18, TLZ5V1C-GS18) are all manufactured by Vishay General Semiconductor - Diodes Division and meet these equivalence criteria. All substitutes are active products with current manufacturing status, ensuring long-term availability and supply chain reliability.

Parameter Comparison

Parameter	CLL5231B TR	TLZ5V1B-GS08	TLZ5V1B-GS18	TLZ5V1C-GS18
Manufacturer	Central Semiconductor Corp	Vishay General Semiconductor	Vishay General Semiconductor	Vishay General Semiconductor
Product Status	Obsolete	Active	Active	Active
Voltage - Zener (Nom)	5.1 V	5.1 V	5.1 V	5.1 V
Power - Max	500 mW	500 mW	500 mW	500 mW
Impedance (Max)	17 Ohms	20 Ohms	20 Ohms	20 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 2 V	2 µA @ 2 V	2 µA @ 2 V	2 µA @ 2 V
Voltage - Forward (Vf) (Max) @ If	1.25 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	-65 to 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
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Primary Recommendation: TLZ5V1B-GS18

The TLZ5V1B-GS18 is the preferred substitute for the CLL5231B TR. This part is manufactured by Vishay General Semiconductor - Diodes Division with active product status, ensuring continuous availability and manufacturing support. The TLZ5V1B-GS18 maintains full electrical equivalence at the 5.1 V zener voltage and 500 mW power rating. With 28,215 units in current inventory, this part offers superior supply chain reliability. The component is ROHS3 compliant, meeting modern environmental and regulatory requirements. The operating temperature range of -65 to 175°C covers standard industrial and commercial applications.

Secondary Recommendation: TLZ5V1B-GS08

The TLZ5V1B-GS08 provides an alternative substitute with identical electrical specifications to the TLZ5V1B-GS18. This variant differs only in packaging configuration (Tape & Reel format designation). With 5,450 units in inventory, this part remains readily available. Selection between TLZ5V1B-GS08 and TLZ5V1B-GS18 should be based on procurement and assembly requirements specific to your manufacturing process.

Tertiary Recommendation: TLZ5V1C-GS18

The TLZ5V1C-GS18 is functionally equivalent to both primary and secondary recommendations, with identical electrical performance. However, inventory availability is limited to 797 units. This part should be selected only when the primary and secondary options are unavailable or when specific design requirements mandate the TLZ5V1C variant designation.

Compliance Considerations:

All three substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution. The CLL5231B TR, being an obsolete part, may not meet modern compliance standards for new product designs.

Frequently Asked Questions (FAQ)

Q: Can the TLZ5V1B-GS08, TLZ5V1B-GS18, and TLZ5V1C-GS18 be used interchangeably with the CLL5231B TR?

A: Yes. All three substitute parts maintain electrical equivalence at the critical parameters: 5.1 V zener voltage, 500 mW power dissipation, and SOD-80 package configuration. They are pin-compatible and functionally interchangeable in circuit applications designed for the CLL5231B TR.

Q: What are the differences between TLZ5V1B-GS08 and TLZ5V1B-GS18?

A: Both parts are electrically identical with the same zener voltage, power rating, impedance, and operating temperature range. The designation difference (GS08 vs. GS18) reflects packaging and tape configuration specifications for automated assembly. Selection should be based on your manufacturing equipment and procurement requirements.

Q: Why does the CLL5231B TR have a higher maximum impedance (17 Ohms) compared to the Vishay substitutes (20 Ohms)?

A: The impedance specifications are within acceptable engineering tolerances for zener diode applications. The 3-ohm difference does not affect functional compatibility in standard voltage regulation circuits. Both values fall within the normal performance envelope for 5.1 V zener diodes in this power class.

Q: Is the operating temperature range difference (-65 to 200°C for CLL5231B TR versus -65 to 175°C for substitutes) significant?

A: The substitute parts operate across -65 to 175°C, which covers standard industrial (-40 to 85°C) and extended temperature (-55 to 125°C) applications. If your circuit requires operation above 175°C, the CLL5231B TR specifications would be necessary. For typical applications, the 175°C maximum is sufficient.

Q: What is the significance of the reverse leakage current difference (5 µA for CLL5231B TR versus 2 µA for substitutes)?

A: The substitute parts exhibit lower reverse leakage current, which is a performance improvement. Lower leakage reduces standby power consumption and improves circuit efficiency. This difference is not a compatibility issue; the substitutes perform better in this parameter.

Q: Are the Vishay TLZ5V1 series parts suitable for new product designs?

A: Yes. The TLZ5V1B-GS08, TLZ5V1B-GS18, and TLZ5V1C-GS18 are all active products with current manufacturing status. They are recommended for new designs requiring 5.1 V zener diodes in SOD-80 packages. ROHS3 compliance ensures compatibility with modern manufacturing and environmental standards.

Q: What packaging format should I specify for automated assembly?

A: Both TLZ5V1B-GS08 and TLZ5V1B-GS18 are supplied in Tape & Reel (TR) format suitable for automated pick-and-place assembly. Consult your assembly equipment specifications and procurement requirements to determine the appropriate variant.

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