BZX84W-C68X Equivalent & Substitute Parts

Part Overview

The BZX84W-C68X is an active Zener diode manufactured by Nexperia USA Inc., designed for voltage regulation and protection applications. This surface mount component operates at a nominal Zener voltage of 68 V with a maximum power dissipation of 275 mW in the SOT-323 package. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1), making it suitable for standard manufacturing environments. Equivalent and substitute parts are identified to provide design flexibility, inventory alternatives, and continuity of supply for applications requiring identical electrical performance within specified tolerance ranges.

Substiute Parts

BZX84W-C68X

Nexperia USA Inc.In Stock: 1055BZX84W-C68X Datasheet

Current PartRFQ

BZX84W-B68F

Nexperia USA Inc.In Stock: 796BZX84W-B68F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BZX84W-C68X are identified based on strict electrical and mechanical parameter matching within the Zener diode category. The substitution criteria are:

Critical Parameters for Substitution:

• Nominal Zener voltage: 68 V (exact match required)
• Maximum power dissipation: 275 mW (exact match required)
• Package type: SOT-323 (exact match required)
• Mounting type: Surface Mount (exact match required)
• Impedance (Max): 240 Ohms (exact match required)
• Reverse leakage current: 50 nA @ 47.6 V (exact match required)
• Forward voltage: 900 mV @ 10 mA (exact match required)
• Operating temperature: 150°C (exact match required)

Tolerance Variation: The BZX84W-C68X carries a ±5% Zener voltage tolerance. Substitute parts may have different tolerance specifications (such as ±2%) while maintaining the same nominal voltage and all other electrical characteristics. Tighter tolerance specifications represent enhanced precision without compromising functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

BZX84W-C68X (Primary Part) The BZX84W-C68X is the primary specification with ±5% Zener voltage tolerance. This part is active, ROHS3 compliant, and carries unlimited moisture sensitivity rating. Selection is appropriate for applications where standard tolerance specifications meet circuit requirements and cost optimization is a priority.

BZX84W-B68F (Substitute Part) The BZX84W-B68F is a direct functional equivalent with identical electrical performance across all critical parameters. The primary distinction is the tighter ±2% Zener voltage tolerance compared to the ±5% tolerance of the primary part. Both parts are manufactured by Nexperia USA Inc., carry active product status, and maintain ROHS3 compliance and unlimited MSL rating. Selection of the BZX84W-B68F is appropriate when circuit design requires enhanced voltage regulation precision or when the primary part is unavailable. The substitute part is electrically and mechanically interchangeable in all applications designed for the BZX84W-C68X.

Frequently Asked Questions (FAQ)

Q: Can the BZX84W-B68F be used as a direct replacement for the BZX84W-C68X?

A: Yes. The BZX84W-B68F is a direct functional equivalent. All critical electrical parameters—nominal Zener voltage, maximum power dissipation, impedance, reverse leakage current, forward voltage, and operating temperature—are identical. The package type (SOT-323) and mounting configuration (surface mount) are identical. The only difference is the Zener voltage tolerance specification (±2% versus ±5%), which represents enhanced precision on the substitute part.

Q: What does the tolerance difference between ±5% and ±2% mean for circuit performance?

A: Tolerance specifications define the acceptable range of Zener voltage variation from the nominal 68 V value. The BZX84W-C68X (±5%) allows voltage variation between 64.6 V and 71.4 V. The BZX84W-B68F (±2%) allows variation between 66.64 V and 69.36 V. The tighter tolerance of the substitute part provides more precise voltage regulation. Applications requiring strict voltage control benefit from the ±2% specification, while applications with broader voltage acceptance ranges function identically with either part.

Q: Are there any package or mounting differences between these parts?

A: No. Both parts use the SC-70 / SOT-323 surface mount package. Footprint, lead spacing, and mounting requirements are identical. No PCB layout modifications are required when substituting between these parts.

Q: Do both parts meet the same compliance and environmental standards?

A: Yes. Both the BZX84W-C68X and BZX84W-B68F are ROHS3 compliant, carry REACH Unaffected status, and have unlimited moisture sensitivity rating (MSL 1). Both parts are classified as active products. Compliance and environmental requirements are identical.

Q: What is the maximum power dissipation for both parts?

A: Both parts have a maximum power dissipation of 275 mW. Circuit designs must ensure that power dissipation does not exceed this limit under any operating condition.

Q: Are these parts suitable for high-temperature applications?

A: Both parts have a maximum operating temperature of 150°C (TJ). Applications operating at or below this temperature are within specification. Thermal management design must ensure the junction temperature does not exceed 150°C.