BZX84W-B27F Equivalent & Substitute Parts

Part Overview

The BZX84W-B27F is an active surface mount Zener diode manufactured by Nexperia USA Inc., designed for voltage regulation and protection applications. This component operates at a nominal Zener voltage of 27 V with a maximum power dissipation of 275 mW in a compact SOT-323 package. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1), making it suitable for standard manufacturing environments. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	27	V
Tolerance	±2%	%
Power - Max	275	mW
Impedance (Max)	80	Ohms
Current - Reverse Leakage @ Vr	50	nA @ 18.9 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	150	°C (TJ)
Package / Case	SC-70, SOT-323	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the BZX84W-B27F is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part BZX84W-B27X is classified as a parametric equivalent based on the following criteria:

Key Substitution Parameters:

Nominal Zener voltage: 27 V (identical)
Tolerance specification: ±2% (identical)
Maximum power dissipation: 275 mW (identical)
Maximum impedance: 80 Ohms (identical)
Reverse leakage current: 50 nA @ 18.9 V (identical)
Forward voltage: 900 mV @ 10 mA (identical)
Operating temperature range: 150°C (TJ) (identical)
Package designation: SOT-323 (identical)
Mounting configuration: Surface Mount (identical)
Series classification: BZX84W (identical)
Compliance status: ROHS3, REACH Unaffected (identical)

Both parts originate from the same manufacturer (Nexperia USA Inc.) and share identical electrical performance characteristics and physical form factor, enabling direct substitution in circuit applications.

Parameter Comparison

Parameter	BZX84W-B27F	BZX84W-B27X	Match
Manufacturer	Nexperia USA Inc.	Nexperia USA Inc.	✓
Category	Diodes, Zener	Diodes, Zener	✓
Series	BZX84W	BZX84W	✓
Voltage - Zener (Nom)	27 V	27 V	✓
Tolerance	±2%	±2%	✓
Power - Max	275 mW	275 mW	✓
Impedance (Max)	80 Ohms	80 Ohms	✓
Current - Reverse Leakage @ Vr	50 nA @ 18.9 V	50 nA @ 18.9 V	✓
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	✓
Operating Temperature	150°C (TJ)	150°C (TJ)	✓
Package / Case	SC-70, SOT-323	SC-70, SOT-323	✓
Mounting Type	Surface Mount	Surface Mount	✓
Supplier Device Package	SOT-323	SOT-323	✓
Product Status	Active	Active	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	✓
REACH Status	REACH Unaffected	REACH Unaffected	✓

Engineering Selection Recommendations

Both the BZX84W-B27F and BZX84W-B27X are active products from Nexperia USA Inc. with identical electrical specifications and mechanical packaging. Selection between these parts should be based on availability and supply chain requirements.

Compliance Considerations:

Both parts are ROHS3 compliant, meeting environmental regulatory requirements
Both parts carry REACH Unaffected status, indicating no restricted substances of concern
Both parts are classified under ECCN EAR99 and HTSUS 8541.10.0050
Both parts maintain MSL 1 (Unlimited) moisture sensitivity rating, requiring no special storage or handling precautions

Inventory Status:

BZX84W-B27F: 1,057 pieces available
BZX84W-B27X: 2,350 pieces available

The BZX84W-B27X offers higher inventory availability while maintaining complete electrical and mechanical equivalence to the BZX84W-B27F.

Frequently Asked Questions (FAQ)

Q: Can BZX84W-B27X be used as a direct replacement for BZX84W-B27F?

A: Yes. Both parts are parametric equivalents with identical Zener voltage (27 V), power rating (275 mW), tolerance (±2%), impedance (80 Ohms), and SOT-323 package configuration. No circuit modifications are required.

Q: Are there any differences in the SOT-323 package between these parts?

A: No. Both parts use the identical SC-70, SOT-323 package designation with surface mount configuration, ensuring mechanical and thermal compatibility in PCB layouts.

Q: Do these parts require different handling or storage procedures?

A: No. Both parts carry MSL 1 (Unlimited) moisture sensitivity rating, indicating identical storage and handling requirements with no special environmental controls needed.

Q: What is the significance of the part number suffix (F vs. X)?

A: The suffix designates different tape and reel configurations or manufacturing batches within the BZX84W-B27 product line. All electrical and mechanical specifications remain identical.

Q: Are both parts ROHS3 compliant?

A: Yes. Both BZX84W-B27F and BZX84W-B27X are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

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

A: Yes. Both parts are active products from the same manufacturer with identical electrical performance, operating temperature range (150°C TJ), and compliance certifications, supporting use in equivalent reliability classifications.

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