CZRF52C30-HF Equivalent & Substitute Parts

Part Overview

The CZRF52C30-HF is a 30 V Zener diode manufactured by Comchip Technology, rated for 200 mW power dissipation with ±5% voltage tolerance. This surface mount component in 1005/SOD-323F package is classified as Active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain discontinuity, or design flexibility needs.

Substiute Parts

CZRF52C30-HF

Comchip TechnologyIn Stock: 876CZRF52C30-HF Datasheet

Current PartRFQ

BZT52C30S-TP

Micro Commercial CoIn Stock: 1710BZT52C30S-TP Datasheet

MFR RecommendedRFQ

BZX84J-B30,115

Nexperia USA Inc.In Stock: 21407BZX84J-B30,115 Datasheet

MFR RecommendedRFQ

BZX84J-C30,115

Nexperia USA Inc.In Stock: 4255BZX84J-C30,115 Datasheet

MFR RecommendedRFQ

D3Z30BF-7

Diodes IncorporatedIn Stock: 3818D3Z30BF-7 Datasheet

MFR RecommendedRFQ

TDZ30J,115

Nexperia USA Inc.In Stock: 3993TDZ30J,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria applied strictly to the provided parameters:

Primary Substitution Criteria:

• Zener voltage (Vz) nominal value: 30 V (tolerance range ±3% to ±7% acceptable)
• Power rating: minimum 200 mW (higher ratings acceptable for thermal margin)
• Impedance (Zzt): maximum 80 Ohms (lower values acceptable)
• Reverse leakage current: maximum 100 nA (lower values acceptable)
• Forward voltage: maximum 900 mV @ 10 mA (higher ratings acceptable if within specified test conditions)
• Operating temperature range: minimum -55°C to 125°C (extended ranges acceptable)
• Mounting type: Surface Mount (required)
• Package compatibility: SOD-323F or equivalent mechanical footprint (1005/SOD-323F)
• Compliance: RoHS3 Compliant (required)

Substitute Parts Identified:

1. BZT52C30S-TP (Micro Commercial Co) – Meets all primary criteria with ±7% tolerance and 200 mW rating
2. BZX84J-B30,115 (Nexperia USA Inc.) – Exceeds power rating (550 mW), tighter tolerance (±2%), automotive grade
3. BZX84J-C30,115 (Nexperia USA Inc.) – Exceeds power rating (550 mW), matches tolerance (±5%), automotive grade
4. D3Z30BF-7 (Diodes Incorporated) – Nominal voltage 29.94 V (within tolerance), 400 mW rating, ±3% tolerance
5. TDZ30J,115 (Nexperia USA Inc.) – Exact 30 V nominal, 500 mW rating, ±2% tolerance, automotive grade

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Minimal Design Impact):

• BZT52C30S-TP: Identical power rating (200 mW) and impedance (80 Ω). Extended temperature range (-65°C to 150°C) provides additional operational margin. Tolerance widens to ±7%, acceptable for non-critical voltage reference applications. No design changes required.

Higher Power Capability (Thermal Margin Enhancement):

• BZX84J-C30,115: Matches original tolerance (±5%) with 550 mW power rating (2.75× original). Tighter impedance (40 Ω) improves voltage regulation. AEC-Q101 automotive qualification provides additional reliability assurance. Suitable for designs requiring thermal headroom or automotive-grade reliability.
• BZX84J-B30,115: Tightest tolerance (±2%) with 550 mW rating. AEC-Q101 qualified. Recommended for precision voltage reference circuits where tolerance and stability are critical.

Moderate Power Upgrade:

• TDZ30J,115: 500 mW rating with ±2% tolerance and AEC-Q101 qualification. Maintains original lower temperature limit (-55°C minimum). Optimal for automotive applications requiring both thermal margin and voltage precision.

Alternative Voltage Nominal:

• D3Z30BF-7: Nominal voltage 29.94 V (within ±3% tolerance band of 30 V specification). 400 mW power rating provides intermediate thermal capability. Suitable only when exact 30 V nominal is not required and circuit design accommodates ±3% voltage variation.

All substitute parts maintain:

• RoHS3 compliance
• Surface mount configuration
• SOD-323F package compatibility
• Active product status

Frequently Asked Questions (FAQ)

Q1: Can BZT52C30S-TP replace CZRF52C30-HF in all applications?

A: Yes, for applications where the original 200 mW power rating and ±5% tolerance are specified. BZT52C30S-TP provides identical electrical performance with extended temperature range (-65°C to 150°C vs. -55°C to 125°C). The ±7% tolerance is wider but remains within acceptable limits for general voltage regulation. No circuit modifications required.

Q2: Why do some substitutes have higher power ratings (550 mW vs. 200 mW)?

A: Higher power ratings provide thermal margin and allow the component to operate at lower junction temperatures under the same current load, improving long-term reliability and voltage stability. These parts are backward-compatible with 200 mW designs. The higher rating does not increase power consumption; it only increases the maximum allowable dissipation.

Q3: What is the significance of AEC-Q101 qualification on BZX84J and TDZ30J parts?

A: AEC-Q101 is an automotive industry qualification standard requiring enhanced reliability testing, including thermal cycling, moisture resistance, and long-term stability verification. These parts are suitable for automotive and mission-critical applications. Non-automotive designs may use these parts without penalty; the qualification represents additional assurance.

Q4: Is D3Z30BF-7 with 29.94 V nominal voltage acceptable as a substitute?

A: D3Z30BF-7 is acceptable only in applications where the circuit design tolerates ±3% voltage variation from the nominal 30 V specification. The 29.94 V nominal falls within the ±5% tolerance band of the original part but represents a lower nominal point. Verify circuit performance at this voltage before substitution.

Q5: Are all substitute parts available in Tape & Reel (TR) packaging?

A: Yes, all identified substitute parts are supplied in Tape & Reel packaging suitable for automated assembly. Package case designations (SOD-323, SOD-323F, SC-76, SC-90) are mechanically compatible with the original 1005/SOD-323F footprint for surface mount PCB assembly.

Q6: What is the difference between SOD-323 and SOD-323F packages?

A: Both are surface mount packages with identical mechanical footprints and electrical performance. SOD-323F includes a flat lead design for improved solder joint reliability. The packages are interchangeable on standard PCB layouts. Verify with assembly equipment specifications if package variant matters for your production process.

Q7: Can I use BZX84J-B30,115 instead of BZX84J-C30,115?

A: Yes. Both parts are electrically identical except for tolerance: BZX84J-B30,115 has ±2% tolerance while BZX84J-C30,115 has ±5%. BZX84J-B30,115 provides tighter voltage regulation at the cost of potentially higher component cost. Select based on circuit tolerance requirements.

Q8: What is the reverse leakage current specification and why does it vary?

A: Reverse leakage current (Ir) is the small current flowing through the diode when reverse-biased. Lower values indicate better diode quality and lower power loss. Variations (50 nA vs. 100 nA) reflect different manufacturing processes. Both values are acceptable for standard applications; lower leakage improves efficiency in precision circuits.

Q9: Are all substitute parts RoHS3 compliant?

A: Yes, all identified substitute parts carry RoHS3 compliance certification, matching the original CZRF52C30-HF. All parts are also REACH Unaffected and classified as EAR99 for export control purposes.

Q10: Which substitute part should I select for a new design?

A: For new designs without automotive requirements, BZT52C30S-TP provides the most direct equivalent with identical electrical ratings and extended temperature range. For designs requiring enhanced reliability or automotive qualification, BZX84J-C30,115 or TDZ30J,115 are recommended. For precision voltage reference circuits, BZX84J-B30,115 with ±2% tolerance is optimal.