CZRF52C27-HF Zener Diode 27V 200mW Equivalent & Substitute Parts

Part Overview

The CZRF52C27-HF is a surface mount zener diode manufactured by Comchip Technology, rated at 27V nominal zener voltage with 200mW maximum power dissipation. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, manufacturing discontinuation, or application-specific requirements such as enhanced power rating, improved tolerance, or automotive qualification.

Substiute Parts

CZRF52C27-HF

Comchip TechnologyIn Stock: 759CZRF52C27-HF Datasheet

Current PartRFQ

BZT52C27S-TP

Micro Commercial CoIn Stock: 3463BZT52C27S-TP Datasheet

MFR RecommendedRFQ

BZX84J-B27,115

Nexperia USA Inc.In Stock: 849BZX84J-B27,115 Datasheet

MFR RecommendedRFQ

BZX84J-C27,115

Nexperia USA Inc.In Stock: 4508BZX84J-C27,115 Datasheet

MFR RecommendedRFQ

BZX84J-C27,135

Nexperia USA Inc.In Stock: 10810BZX84J-C27,135 Datasheet

MFR RecommendedRFQ

TDZ27J,115

Nexperia USA Inc.In Stock: 6401TDZ27J,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the CZRF52C27-HF is based on the following critical parameters:

Primary Matching Criteria:

• Zener voltage: 27V nominal
• Zener voltage tolerance: ±5% or tighter
• Mounting type: Surface Mount
• RoHS3 compliance

Secondary Compatibility Factors:

• Power rating: 200mW minimum (higher ratings acceptable for drop-in replacement)
• Package compatibility: SOD-323F or equivalent mechanical footprint
• Operating temperature range: Minimum -55°C to 125°C overlap required
• Impedance and leakage characteristics within acceptable engineering margins

Substitute Categories:

Category 1: Direct Electrical Equivalents (200mW Class)

• BZT52C27S-TP: Identical 27V/200mW rating with ±7% tolerance, extended temperature range (-65°C to 150°C)

Category 2: Enhanced Performance Substitutes (550mW Class)

• BZX84J-B27,115: 27V/550mW with ±2% tolerance, automotive grade AEC-Q101 qualified
• BZX84J-C27,115: 27V/550mW with ±5% tolerance, automotive grade AEC-Q101 qualified
• BZX84J-C27,135: 27V/550mW with ±5% tolerance, automotive grade AEC-Q101 qualified, highest inventory

Category 3: Intermediate Performance Substitutes (500mW Class)

• TDZ27J,115: 27V/500mW with ±2% tolerance, automotive grade AEC-Q101 qualified, extended temperature range

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Specifications): BZT52C27S-TP is the primary equivalent substitute. It maintains the 27V/200mW rating with matching impedance characteristics. The ±7% tolerance is within acceptable variance for non-critical applications. Extended operating temperature range (-65°C to 150°C) provides additional margin. This part is suitable for applications where the original CZRF52C27-HF specifications are mandatory and no performance enhancement is required.

For Enhanced Reliability Applications: BZX84J-C27,115 or BZX84J-C27,135 are recommended for applications requiring automotive qualification (AEC-Q101). These parts provide 550mW power rating with ±5% tolerance matching the original specification tolerance. Reduced impedance (40Ω vs 80Ω) improves voltage regulation characteristics. Extended temperature range supports harsh environment deployment. BZX84J-C27,135 offers the highest inventory availability (10798 Pcs).

For Precision Applications: BZX84J-B27,115 or TDZ27J,115 provide ±2% tolerance with automotive qualification. TDZ27J,115 offers intermediate 500mW power rating with temperature range overlap at the lower bound (-55°C). BZX84J-B27,115 provides maximum power rating (550mW) with full extended temperature coverage.

Compliance Verification: All substitute parts maintain RoHS3 compliance, REACH unaffected status, and EAR99 ECCN classification. Moisture sensitivity level remains MSL 1 (Unlimited) across all options.

Frequently Asked Questions (FAQ)

Q: Can BZT52C27S-TP be used as a direct drop-in replacement for CZRF52C27-HF?

A: Yes. BZT52C27S-TP maintains identical 27V nominal zener voltage and 200mW power rating. The ±7% tolerance is compatible with ±5% specification. Both use SOD-323F package with equivalent mechanical footprint. Extended temperature range (-65°C to 150°C) encompasses the original operating range (-55°C to 125°C).

Q: What is the advantage of using BZX84J-C27,135 over the original CZRF52C27-HF?

A: BZX84J-C27,135 provides 550mW power rating (2.75× higher than 200mW), ±5% tolerance matching the original, reduced impedance (40Ω vs 80Ω) for improved voltage regulation, automotive AEC-Q101 qualification, and extended temperature range (-65°C to 150°C). These enhancements support more demanding applications while maintaining electrical compatibility.

Q: Are all substitute parts compatible with the same PCB footprint?

A: All substitute parts use SOD-323F or SOD-323 package designations, which share equivalent mechanical dimensions and land patterns. PCB layout compatibility is maintained across all listed substitutes.

Q: Which substitute part has the best availability?

A: BZX84J-C27,135 has the highest inventory at 10798 Pcs. BZX84J-C27,115 provides 4400 Pcs, and TDZ27J,115 offers 6380 Pcs. All three are suitable for high-volume production requirements.

Q: Can I use a 550mW rated part in place of a 200mW rated part?

A: Yes, for drop-in replacement. Higher power rating provides design margin and improved thermal performance. The 27V zener voltage, tolerance, and package compatibility remain the critical matching parameters. Application thermal management must accommodate the substitute component's characteristics.

Q: What is the difference between BZX84J-B27,115 and BZX84J-C27,115?

A: Both are 27V/550mW automotive-qualified zener diodes with identical impedance (40Ω) and temperature range (-65°C to 150°C). The primary difference is tolerance: BZX84J-B27,115 provides ±2% tolerance while BZX84J-C27,115 provides ±5% tolerance. BZX84J-C27,115 offers higher inventory availability.

Q: Is automotive qualification (AEC-Q101) required for my application?

A: AEC-Q101 qualification is required for automotive, industrial, and high-reliability applications. For consumer or general-purpose applications, non-qualified parts such as BZT52C27S-TP are acceptable. Verify application requirements before part selection.