CZRT55C16-G Zener Diode 16V 350mW SOT-23-3 Equivalent & Substitute Parts

Part Overview

The CZRT55C16-G is a 16V Zener diode manufactured by Comchip Technology, rated for 350mW power dissipation in a surface mount SOT-23-3 package. This component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility within the SOT-23-3 package family, enabling design flexibility and supply chain alternatives while maintaining circuit performance.

Substiute Parts

CZRT55C16-G

Comchip TechnologyIn Stock: 929CZRT55C16-G Datasheet

Current PartRFQ

BZX84B16-7-F

Diodes IncorporatedIn Stock: 4141BZX84B16-7-F Datasheet

MFR RecommendedRFQ

BZX84B16Q-7-F

Diodes IncorporatedIn Stock: 2110BZX84B16Q-7-F Datasheet

MFR RecommendedRFQ

BZX84C16-7-F

Diodes IncorporatedIn Stock: 32254BZX84C16-7-F Datasheet

MFR RecommendedRFQ

BZX84C16-TP

Micro Commercial CoIn Stock: 6907BZX84C16-TP Datasheet

MFR RecommendedRFQ

DDZX16-13

Diodes IncorporatedIn Stock: 1014DDZX16-13 Datasheet

MFR RecommendedRFQ

DDZX16-7

Diodes IncorporatedIn Stock: 42256DDZX16-7 Datasheet

MFR RecommendedRFQ

MMBZ5246B-7-F

Diodes IncorporatedIn Stock: 6304MMBZ5246B-7-F Datasheet

MFR RecommendedRFQ

MMBZ5246B-TP

Micro Commercial CoIn Stock: 3712MMBZ5246B-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Primary Matching Criteria:

• Zener voltage: 16V nominal (all substitutes match)
• Package type: SOT-23-3 surface mount (all substitutes match)
• Operating temperature range: -65°C to +150°C minimum (all substitutes meet or exceed)
• RoHS3 compliance: Required (all substitutes compliant)

Secondary Compatibility Parameters:

• Power rating: 300mW to 350mW acceptable (circuit design dependent)
• Tolerance: ±2% to ±6% (tighter tolerance substitutes acceptable)
• Impedance: 17 to 40 Ohms (lower impedance acceptable)
• Reverse leakage: 50 to 100 nA (lower leakage acceptable)

Substitute parts are grouped into two categories: direct equivalents (matching 350mW power rating) and compatible alternatives (300mW rating with equivalent electrical performance).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (350mW Power Rating):

BZX84C16-TP and MMBZ5246B-7-F are direct functional equivalents to CZRT55C16-G, matching the 350mW power dissipation specification. Both are Active status products with ROHS3 compliance. BZX84C16-TP operates from -55°C to +150°C (narrower low-temperature range than original). MMBZ5246B-7-F maintains the full -65°C to +150°C operating range and features lower impedance (17 Ohms vs. 40 Ohms), providing superior high-frequency performance.

Compatible Alternatives (300mW Power Rating):

BZX84B16-7-F, BZX84B16Q-7-F, BZX84C16-7-F, DDZX16-13, and DDZX16-7 are electrically compatible substitutes with 300mW power ratings. These parts are suitable for applications where thermal dissipation is not the limiting factor. BZX84B16-7-F and BZX84B16Q-7-F offer tighter tolerance (±2%) compared to the original ±6%. DDZX16-13 and DDZX16-7 feature significantly lower impedance (18 Ohms) and reduced reverse leakage (50 nA), beneficial for precision voltage regulation circuits.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating. BZX84B16Q-7-F includes AEC-Q101 automotive qualification. Inventory availability ranges from 921 to 42,200 units across substitute options, providing supply chain flexibility.

Frequently Asked Questions (FAQ)

Q: Can I substitute a 300mW rated part for the 350mW CZRT55C16-G?

A: Yes, if circuit thermal analysis confirms that power dissipation does not exceed 300mW under worst-case operating conditions. The 300mW alternatives (BZX84B16-7-F, BZX84C16-7-F, DDZX16-7) are electrically equivalent and maintain identical voltage regulation performance at lower power levels.

Q: What is the difference between BZX84B16-7-F and BZX84C16-7-F?

A: Both are 16V, 300mW Zener diodes in SOT-23-3 packages from Diodes Incorporated. The primary difference is tolerance: BZX84B16-7-F specifies ±2% tolerance, while BZX84C16-7-F specifies ±6% tolerance (matching the original CZRT55C16-G). Selection depends on voltage regulation precision requirements.

Q: Why do DDZX16-13 and DDZX16-7 have lower impedance values?

A: Lower impedance (18 Ohms vs. 40 Ohms) indicates superior dynamic response and reduced output impedance variation across the operating current range. This characteristic benefits precision voltage reference applications and high-frequency filtering circuits.

Q: Are MMBZ5246B-7-F and MMBZ5246B-TP interchangeable?

A: Both parts are electrically identical 16V, 350mW Zener diodes with ±5% tolerance and 17 Ohms impedance. The difference is operating temperature range: MMBZ5246B-7-F operates -65°C to +150°C, while MMBZ5246B-TP operates -55°C to +150°C. Selection depends on minimum operating temperature requirements.

Q: Does BZX84B16Q-7-F automotive qualification affect general-purpose applications?

A: No. AEC-Q101 qualification indicates the part meets automotive reliability standards and is suitable for general-purpose applications. Automotive-qualified parts typically exhibit tighter process control and enhanced reliability margins.

Q: What packaging formats are available for these substitutes?

A: All substitute parts are supplied in SOT-23-3 surface mount packages. Packaging options include Tape & Reel (TR) for automated assembly and Cut Tape (CT) with Digi-Reel® for mixed-volume orders. Verify packaging format with supplier before procurement.