BZX84W-C11F Equivalent & Substitute Parts

Part Overview

The BZX84W-C11F is an 11 V Zener diode manufactured by Nexperia USA Inc., rated for 275 mW maximum power dissipation in a surface mount SOT-323 package. This component is classified as Active product status and is ROHS3 compliant. Zener diodes of this specification are used in voltage regulation and protection circuits where precise voltage reference or transient suppression is required. Alternative part numbers within the same series may be necessary due to inventory availability, tolerance requirements, or specific application constraints.

Substiute Parts

BZX84W-C11F

Nexperia USA Inc.In Stock: 5124BZX84W-C11F Datasheet

Current PartRFQ

BZX84W-B11X

Nexperia USA Inc.In Stock: 2831BZX84W-B11X Datasheet

Parametric EquivalentRFQ

BZX84W-C11X

Nexperia USA Inc.In Stock: 1215BZX84W-C11X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of Zener diodes within the BZX84W series is determined by electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Parameters for Substitution:

• Zener voltage (Nominal): 11 V (exact match required)
• Power rating: 275 mW (exact match required)
• Package type: SOT-323 (exact match required)
• Mounting type: Surface Mount (exact match required)
• Impedance (Maximum): 20 Ohms (exact match required)
• Reverse leakage current: 100 nA @ 8 V (exact match required)
• Forward voltage: 900 mV @ 10 mA (exact match required)

Variable Parameters Allowing Substitution:

• Tolerance: ±5% or ±2% (tighter tolerance does not restrict substitution)
• Packaging format: Tape & Reel (TR) format is consistent across all parts

The BZX84W-C11F (±5% tolerance) is directly substitutable with BZX84W-C11X (±5% tolerance, different packaging format) and BZX84W-B11X (±2% tolerance, tighter specification). The BZX84W-B11X variant offers improved tolerance performance while maintaining all other electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—BZX84W-C11F, BZX84W-B11X, and BZX84W-C11X—are Active product status components manufactured by Nexperia USA Inc. and meet ROHS3 compliance requirements. Selection between these parts is based on tolerance requirements and inventory availability.

BZX84W-C11F is the primary reference part with ±5% tolerance specification. This part is suitable for general voltage regulation and protection applications where standard tolerance is acceptable.

BZX84W-B11X provides tighter ±2% tolerance while maintaining identical electrical and mechanical specifications. This variant is appropriate for applications requiring improved voltage accuracy and stability. The ±2% tolerance represents a stricter specification that does not compromise compatibility with designs specified for ±5% tolerance.

BZX84W-C11X matches the BZX84W-C11F electrical specifications exactly, with identical ±5% tolerance. This part differs only in packaging format designation and serves as a direct functional equivalent.

All three parts carry identical compliance certifications (ROHS3, REACH Unaffected, MSL 1) and are suitable for direct substitution in surface mount applications requiring 11 V Zener regulation at 275 mW power dissipation.

Frequently Asked Questions (FAQ)

Q: Can BZX84W-B11X replace BZX84W-C11F in existing designs?

A: Yes. The BZX84W-B11X is a direct substitute with identical electrical and mechanical specifications. The ±2% tolerance of the B11X variant is a tighter specification than the ±5% tolerance of the C11F, making it compatible with all applications designed for the C11F.

Q: What is the difference between BZX84W-C11F and BZX84W-C11X?

A: Both parts have identical electrical specifications (11 V, 275 mW, ±5% tolerance) and package type (SOT-323). The designation difference reflects packaging format variation. Both are functionally equivalent for circuit applications.

Q: Are all three parts suitable for the same PCB layout?

A: Yes. All three parts use the identical SOT-323 surface mount package with the same pin configuration, footprint, and mounting requirements. PCB layout and reflow profiles are interchangeable.

Q: Does the ±2% tolerance of BZX84W-B11X affect circuit compatibility?

A: No. The ±2% tolerance is a tighter specification than ±5%, meaning the actual voltage output will be closer to the nominal 11 V value. This improved accuracy does not create incompatibility; it enhances performance in voltage regulation and reference applications.

Q: What compliance certifications apply to all substitute parts?

A: All three parts are ROHS3 compliant, REACH unaffected, and carry Moisture Sensitivity Level 1 (unlimited shelf life). Compliance status is identical across all variants.

Q: Can these parts be used interchangeably in high-temperature applications?

A: Yes. All three parts have identical maximum junction temperature ratings of 150°C and identical thermal characteristics. Operating temperature performance is equivalent across all variants.