BZX384C56-G3-18 Equivalent & Substitute Parts

Part Overview

The BZX384C56-G3-18 is a Zener diode rated at 56 V nominal voltage with 200 mW maximum power dissipation in a surface mount SOD-323 package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is classified as Active and complies with RoHS3 and REACH standards. Alternative equivalent parts are necessary when the primary part number is unavailable, when different packaging formats are required, or when alternative tolerance specifications better suit application requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	56	V
Power - Max	200	mW
Tolerance	±5%	—
Impedance (Max)	200	Ohms
Current - Reverse Leakage @ Vr	50	nA @ 39.2 V
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SC-76, SOD-323	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BZX384C56-G3-18 is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 56 V (exact match required)
Power - Max: 200 mW (exact match required)
Package / Case: SOD-323 (exact match required)
Mounting Type: Surface Mount (exact match required)
Operating Temperature Range: -55°C to 150°C (exact match required)

Secondary Substitution Criteria:

Tolerance: ±5% or tighter (±2% acceptable as superior specification)
Impedance (Max): 200 Ohms (exact match required)
Current - Reverse Leakage: specifications within acceptable range
RoHS and REACH compliance status

Substitute parts are grouped by packaging format (Tape & Reel versus Cut Tape) and tolerance specification. All listed substitutes maintain identical electrical performance within the specified operating parameters.

Parameter Comparison

Parameter	BZX384C56-G3-18	BZX384B56-E3-08	BZX384C56-E3-08	BZX384C56-HE3-18	BZT52C56S
Manufacturer	Vishay	Vishay	Vishay	Vishay	NextGen Components
Voltage - Zener (Nom)	56 V	56 V	56 V	56 V	56 V
Tolerance	±5%	±2%	±5%	±5%	±5%
Power - Max	200 mW	200 mW	200 mW	200 mW	200 mW
Impedance (Max)	200 Ohms	200 Ohms	200 Ohms	200 Ohms	200 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 39.2 V	50 nA @ 39.2 V	50 nA @ 39.2 V	50 nA @ 39.2 V	100 nA @ 43 V
Operating Temperature	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT)	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

BZX384B56-E3-08 (Vishay): This substitute offers tighter tolerance specification (±2% versus ±5%), providing superior voltage regulation accuracy. Identical electrical and thermal performance. Available in Tape & Reel packaging. Suitable for applications requiring enhanced voltage stability.

BZX384C56-E3-08 (Vishay): Direct parametric equivalent with identical tolerance (±5%), voltage, power rating, and impedance. Available in Tape & Reel packaging with higher inventory availability (19,229 units). Recommended for standard applications where packaging format is not a constraint.

BZX384C56-HE3-18 (Vishay): Automotive-grade equivalent qualified to AEC-Q101 standard. Identical electrical specifications to the primary part. Available in Cut Tape packaging format. Suitable for automotive applications or when Cut Tape packaging is required.

BZT52C56S (NextGen Components): Cross-manufacturer equivalent with identical core electrical specifications. Reverse leakage current specification differs (100 nA @ 43 V versus 50 nA @ 39.2 V). Available in Tape & Reel packaging with substantial inventory (601,069 units). Complies with RoHS standards. Suitable for applications where cross-manufacturer sourcing is acceptable.

All substitute parts maintain Active product status and comply with environmental regulations. Selection should be based on packaging format requirements, tolerance specifications, and supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can BZX384B56-E3-08 be used as a direct replacement for BZX384C56-G3-18?

A: Yes. The BZX384B56-E3-08 is a direct electrical substitute with identical voltage (56 V), power rating (200 mW), impedance (200 Ohms), and operating temperature range (-55°C to 150°C). The tighter tolerance specification (±2%) represents an improvement over the primary part (±5%). Both are surface mount SOD-323 packages in Tape & Reel format.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel packaging supplies components on continuous carrier tape wound on reels, suitable for automated assembly processes. Cut Tape packaging supplies components on cut sections of carrier tape, suitable for manual assembly or smaller production runs. The BZX384C56-HE3-18 is available in Cut Tape format, while the primary part and most substitutes are supplied in Tape & Reel format.

Q: Is BZT52C56S from NextGen Components compatible with the BZX384C56-G3-18?

A: Yes. The BZT52C56S is a parametric equivalent with identical nominal voltage (56 V), power rating (200 mW), tolerance (±5%), impedance (200 Ohms), and operating temperature range (-55°C to 150°C). The reverse leakage current specification differs slightly (100 nA @ 43 V versus 50 nA @ 39.2 V), which does not affect functional compatibility in standard applications.

Q: Why would I choose BZX384C56-HE3-18 over other substitutes?

A: The BZX384C56-HE3-18 is qualified to AEC-Q101 automotive standard and carries automotive-grade designation. Select this part when automotive qualification is required or when Cut Tape packaging format is necessary for your assembly process.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts comply with RoHS standards. The Vishay parts carry ROHS3 compliance designation, and the NextGen Components BZT52C56S carries RoHS compliance designation. All parts are REACH Unaffected.

Q: What tolerance specification should I select?

A: The primary part BZX384C56-G3-18 specifies ±5% tolerance. The BZX384B56-E3-08 offers tighter ±2% tolerance. Select ±2% tolerance when applications require enhanced voltage regulation accuracy. Select ±5% tolerance for standard voltage regulation applications where the wider tolerance is acceptable.

Q: Can I mix different substitute parts in the same assembly?

A: All listed substitutes are electrically equivalent and can be used interchangeably within the same circuit design. However, manufacturing and procurement practices typically specify a single part number per assembly to maintain consistency and traceability.

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