FLZ16VC Equivalent & Substitute Parts

Part Overview

The FLZ16VC is a Zener diode manufactured by onsemi, rated at 16.1 V nominal with 500 mW power dissipation in a surface mount SOD-80 (DO-213AC, MINI-MELF) package. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility within the specified voltage, power, and thermal operating ranges while accommodating minor variations in tolerance and impedance characteristics.

Key Parameters

Parameter	FLZ16VC	Unit
Voltage - Zener (Nom)	16.1	V
Tolerance	±3%	-
Power - Max	500	mW
Impedance (Max)	15.2	Ohms
Current - Reverse Leakage @ Vr	133 nA @ 12 V	-
Voltage - Forward (Max) @ If	1.2 V @ 200 mA	-
Operating Temperature Range	-65°C to 175°C	-
Mounting Type	Surface Mount	-
Package / Case	DO-213AC, MINI-MELF, SOD-80	-
Product Status	Obsolete	-

Substitute Part Grouping Explanation

Substitution of the FLZ16VC is determined by the following critical parameters:

Electrical Compatibility Criteria:

Zener voltage nominal rating within 16 V to 16.1 V range
Power dissipation rating of 500 mW
Surface mount package configuration (SOD-80, DO-213AC, MINI-MELF)
Operating temperature range supporting minimum -65°C to 175°C
Reverse leakage current and forward voltage characteristics suitable for circuit operation

Identified Substitute Parts:

The BZV55-B16,115 (NXP USA Inc.) and TZM5246B-GS08 (Vishay General Semiconductor) meet the core electrical and mechanical requirements. Both parts are rated at 16 V nominal (within acceptable tolerance of the 16.1 V specification), feature 500 mW power dissipation, and utilize identical surface mount packaging. Both substitute parts maintain active product status, ensuring ongoing availability and supply chain continuity.

Parameter Comparison

Parameter	FLZ16VC (onsemi)	BZV55-B16,115 (NXP USA Inc.)	TZM5246B-GS08 (Vishay)	Unit
Voltage - Zener (Nom)	16.1	16	16	V
Tolerance	±3%	±2%	±5%	-
Power - Max	500	500	500	mW
Impedance (Max)	15.2	40	17	Ohms
Current - Reverse Leakage @ Vr	133 nA @ 12 V	50 nA @ 11.2 V	100 nA @ 12 V	-
Voltage - Forward (Max) @ If	1.2 V @ 200 mA	900 mV @ 10 mA	1.1 V @ 200 mA	-
Operating Temperature Range	-65°C to 175°C	-65°C to 200°C	-65°C to 175°C	-
Mounting Type	Surface Mount	Surface Mount	Surface Mount	-
Package / Case	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	-
Product Status	Obsolete	Active	Active	-
ECCN	EAR99	EAR99	EAR99	-
HTSUS	8541.10.0050	8541.10.0050	8541.10.0050	-

Engineering Selection Recommendations

BZV55-B16,115 (NXP USA Inc.): This substitute offers the tightest tolerance specification (±2%) and extended upper operating temperature to 200°C. The higher impedance value (40 Ohms maximum) and lower reverse leakage current (50 nA @ 11.2 V) represent measurable differences from the original FLZ16VC. The part maintains active product status with substantial inventory availability (432,441 pieces). Selection is appropriate for applications requiring enhanced temperature margin and tighter voltage regulation.

TZM5246B-GS08 (Vishay General Semiconductor): This substitute provides impedance characteristics (17 Ohms maximum) closely aligned with the FLZ16VC specification and forward voltage performance matching the original part at 200 mA current. The wider tolerance specification (±5%) represents a trade-off against the original ±3% rating. The part maintains active product status with adequate inventory (25,200 pieces) and RoHS3 compliance certification. Selection is appropriate for applications where impedance matching and forward voltage characteristics are critical design parameters.

Both substitute parts satisfy core electrical and mechanical requirements. Selection between them depends on specific circuit requirements regarding impedance, tolerance, and operating temperature margins.

Frequently Asked Questions (FAQ)

Q: Can the BZV55-B16,115 directly replace the FLZ16VC in existing designs?

A: The BZV55-B16,115 is electrically compatible as a direct replacement. Both parts share identical 500 mW power ratings, surface mount SOD-80 packaging, and nominal 16 V zener voltage specification. The BZV55-B16,115 offers superior tolerance (±2% versus ±3%) and extended temperature range (-65°C to 200°C versus -65°C to 175°C). The higher impedance specification (40 Ohms versus 15.2 Ohms) may affect circuit regulation characteristics in applications with variable load conditions.

Q: What are the key differences between the TZM5246B-GS08 and FLZ16VC?

A: The TZM5246B-GS08 maintains nominal 16 V zener voltage, 500 mW power dissipation, and identical surface mount packaging. Impedance specification (17 Ohms) closely matches the FLZ16VC (15.2 Ohms). The primary difference is tolerance specification: TZM5246B-GS08 is rated ±5% compared to FLZ16VC ±3%. Forward voltage performance at 200 mA is equivalent (1.1 V versus 1.2 V). Operating temperature range is identical (-65°C to 175°C).

Q: Are there packaging compatibility concerns when substituting these parts?

A: All three parts utilize identical surface mount packaging: DO-213AC, MINI-MELF, SOD-80. Physical dimensions and land pattern requirements are equivalent. No PCB layout modifications are required for substitution.

Q: How do impedance differences affect circuit performance?

A: Impedance (Zzt) determines the dynamic resistance of the zener diode at operating current. The FLZ16VC specifies 15.2 Ohms maximum impedance. The TZM5246B-GS08 (17 Ohms) represents a 1.8 Ohm increase, producing minimal impact on most applications. The BZV55-B16,115 (40 Ohms maximum) represents a more significant increase, affecting voltage regulation stability under varying load conditions. Applications requiring precise voltage regulation should prioritize the TZM5246B-GS08 or FLZ16VC impedance characteristics.

Q: What is the significance of the ±2% tolerance on the BZV55-B16,115?

A: The BZV55-B16,115 tolerance specification (±2%) is tighter than the FLZ16VC (±3%), meaning the actual zener voltage will remain closer to the nominal 16 V rating across the production population. This provides improved voltage regulation consistency in applications where tight voltage control is required.

Q: Are all substitute parts RoHS compliant?

A: The TZM5246B-GS08 is certified RoHS3 compliant. The FLZ16VC and BZV55-B16,115 specifications provided do not include explicit RoHS certification status. All three parts are REACH unaffected and classified under identical ECCN (EAR99) and HTSUS (8541.10.0050) codes.

Q: Which substitute part should be selected for new designs?

A: Both substitute parts are active products with established supply chains. The BZV55-B16,115 is recommended for applications requiring extended temperature operation (up to 200°C) and tighter voltage tolerance. The TZM5246B-GS08 is recommended for applications where impedance matching with the original FLZ16VC is critical and RoHS3 compliance is required.

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