FLZ9V1C Equivalent & Substitute Parts

Part Overview

The FLZ9V1C is a Zener diode manufactured by onsemi, rated at 9.1 V nominal with 500 mW power dissipation in a surface mount SOD-80 package. This component is classified as obsolete, indicating that onsemi has discontinued production. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and ongoing system support.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	9.1	V
Tolerance	±3%	-
Power - Max	500	mW
Impedance (Max)	6.6	Ohms
Current - Reverse Leakage @ Vr	300 nA @ 6 V	-
Voltage - Forward (Vf) (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	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the FLZ9V1C is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 9.1 V nominal
Power rating: 500 mW maximum
Package type: SOD-80 (DO-213AC, MINI-MELF)
Mounting: Surface mount

Secondary Compatibility Factors:

Operating temperature range (minimum -65°C, maximum ≥175°C)
Voltage tolerance (±3% or tighter preferred, but ±5% acceptable)
Impedance characteristics (Zzt)
Reverse leakage current specifications
Forward voltage characteristics

All substitute parts listed maintain the core electrical specifications (9.1 V, 500 mW, SOD-80 package) and are compatible with the original design requirements. Substitutes are available from active manufacturers, ensuring long-term component availability.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Vf (Max) @ If	Temp Range	Status
FLZ9V1C	onsemi	9.1 V	±3%	500 mW	6.6 Ω	1.2 V @ 200 mA	-65°C to 175°C	Obsolete
BZV55-B9V1,115	Nexperia USA Inc.	9.1 V	±2%	500 mW	15 Ω	900 mV @ 10 mA	-65°C to 200°C	Active
CLL5239B BK PBFREE	Central Semiconductor Corp	9.1 V	±5%	500 mW	10 Ω	1.25 V @ 200 mA	-65°C to 200°C	Active
CLL5239B TR PBFREE	Central Semiconductor Corp	9.1 V	±5%	500 mW	10 Ω	1.25 V @ 200 mA	-65°C to 200°C	Active
TLZ9V1A-GS08	Vishay General Semiconductor	9.1 V	-	500 mW	8 Ω	1.5 V @ 200 mA	-65°C to 175°C	Active
TLZ9V1A-GS18	Vishay General Semiconductor	9.1 V	-	500 mW	8 Ω	1.5 V @ 200 mA	-65°C to 175°C	Active
TLZ9V1B-GS08	Vishay General Semiconductor	9.1 V	-	500 mW	8 Ω	1.5 V @ 200 mA	-65°C to 175°C	Active
TLZ9V1B-GS18	Vishay General Semiconductor	9.1 V	-	500 mW	8 Ω	1.5 V @ 200 mA	-65°C to 175°C	Active
TLZ9V1C-GS08	Vishay General Semiconductor	9.1 V	-	500 mW	8 Ω	1.5 V @ 200 mA	-65°C to 175°C	Active
TLZ9V1C-GS18	Vishay General Semiconductor	9.1 V	-	500 mW	8 Ω	1.5 V @ 200 mA	-65°C to 175°C	Active
TZM5239B-GS08	Vishay General Semiconductor	9.1 V	±5%	500 mW	10 Ω	1.1 V @ 200 mA	-65°C to 175°C	Active

Engineering Selection Recommendations

Primary Substitute Candidates:

The Vishay TLZ9V1 series (TLZ9V1A-GS08, TLZ9V1A-GS18, TLZ9V1B-GS08, TLZ9V1B-GS18, TLZ9V1C-GS08, TLZ9V1C-GS18) represents the most direct functional equivalents. These parts maintain the 9.1 V nominal voltage, 500 mW power rating, and SOD-80 package specification. All variants are RoHS3 compliant and carry active product status with substantial inventory availability. The TLZ9V1B-GS08 variant offers the highest inventory level (17,800 units), ensuring supply chain continuity.

Secondary Substitute Options:

The Nexperia BZV55-B9V1,115 provides tighter voltage tolerance (±2%) and extended operating temperature range to 200°C. This part is suitable for applications requiring enhanced temperature performance.

The Central Semiconductor CLL5239B series (both bulk and tape & reel packaging) offers active status with high inventory levels. The tape & reel variant (CLL5239B TR PBFREE) provides 14,995 units in stock. These parts carry ±5% tolerance and are RoHS3 compliant.

Compliance Status:

All substitute parts are REACH unaffected and classified under ECCN EAR99. All active substitutes carry RoHS3 compliance certification. Moisture sensitivity level remains constant at MSL 1 (Unlimited) across all options.

Frequently Asked Questions (FAQ)

Q: Can I directly replace FLZ9V1C with any of the listed substitutes?

A: Yes. All listed substitute parts maintain the critical electrical specifications: 9.1 V nominal zener voltage, 500 mW maximum power dissipation, and SOD-80 surface mount package. Physical and electrical compatibility is confirmed across all substitutes.

Q: What is the difference between the various Vishay TLZ9V1 variants (A, B, C)?

A: The TLZ9V1A, TLZ9V1B, and TLZ9V1C variants differ in reverse leakage current specifications at different measurement voltages. All three maintain identical zener voltage, power rating, impedance, and operating temperature range. Selection between variants depends on specific reverse leakage requirements for your application.

Q: What is the difference between GS08 and GS18 packaging designations?

A: The GS08 and GS18 designations refer to different tape and reel configurations for automated assembly. Both provide identical electrical performance and package type (SOD-80). Selection is based on assembly equipment compatibility and tape reel specifications.

Q: Why does BZV55-B9V1,115 have a higher impedance (15 Ω) than the original FLZ9V1C (6.6 Ω)?

A: Impedance variation is a normal characteristic difference between manufacturers and product lines. The BZV55-B9V1,115 remains functionally compatible for most applications. Verify impedance requirements in your specific circuit design before selection.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed carry RoHS3 compliance certification. The original FLZ9V1C does not specify RoHS status due to its obsolete classification.

Q: What is the inventory status for each substitute?

A: Inventory levels vary by part number. TLZ9V1B-GS08 offers the highest availability (17,800 units). CLL5239B TR PBFREE provides 14,995 units. BZV55-B9V1,115 has 10,579 units available. All other variants maintain inventory levels between 700 and 5,400 units.

Q: Can I use substitutes with ±5% tolerance instead of the original ±3% tolerance?

A: Tolerance selection depends on your circuit design requirements. The CLL5239B and TZM5239B series offer ±5% tolerance. If your application requires ±3% or tighter tolerance, select BZV55-B9V1,115 (±2%) or Vishay TLZ9V1 series variants (tolerance not specified but typically tighter).

Q: What is the operating temperature difference between substitutes?

A: The original FLZ9V1C operates from -65°C to 175°C. Most substitutes maintain this range. BZV55-B9V1,115 and CLL5239B series extend the upper limit to 200°C, providing enhanced thermal performance for high-temperature applications.

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