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CZRT55C10-G Zener Diode 10V 350mW SOT-23-3 Equivalent & Substitute Parts
Part Overview
The CZRT55C10-G is a 10V 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 10V Zener diode category. Alternative sources become necessary for supply chain continuity, inventory availability, or specific packaging requirements while maintaining functional equivalence.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Zener (Nominal) | 10 | V |
| Power - Maximum | 350 | mW |
| Tolerance | ±6% | - |
| Impedance (Maximum) | 20 | Ohms |
| Current - Reverse Leakage @ Vr | 200 | nA @ 7V |
| Voltage - Forward (Maximum) @ If | 900 | mV @ 10mA |
| Operating Temperature Range | -65 to 150 | °C |
| Mounting Type | Surface Mount | - |
| Package / Case | SOT-23-3 (TO-236-3, SC-59) | - |
| RoHS Status | ROHS3 Compliant | - |
Substitute Part Grouping Explanation
Substitution eligibility for the CZRT55C10-G is determined by the following critical parameters:
Primary Matching Criteria:
- Zener voltage: 10V nominal
- Package type: SOT-23-3 surface mount
- Mounting type: Surface mount
- Operating temperature range: -65°C to 150°C minimum
- RoHS3 compliance status
Secondary Compatibility Parameters:
- Power rating: 350mW or higher
- Tolerance: ±6% or tighter
- Impedance (Zzt): 20 Ohms or lower
- Reverse leakage current: 200nA @ 7V or lower
- Forward voltage: 900mV @ 10mA or lower
Substitute parts are classified into two categories:
MFR Recommended Substitutes: Parts meeting or exceeding all primary and secondary parameters with confirmed manufacturer equivalence.
Parametric Equivalents: Parts meeting primary criteria with minor variations in secondary parameters that do not affect functional performance in standard applications.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Vz (V) | Power (mW) | Tolerance | Zzt (Ohms) | Reverse Leakage @ Vr | Vf (Max) @ If | Temp Range (°C) | Packaging |
|---|---|---|---|---|---|---|---|---|---|
| CZRT55C10-G | Comchip Technology | 10 | 350 | ±6% | 20 | 200 nA @ 7V | 900 mV @ 10mA | -65 to 150 | TR |
| BZX84B10-7-F | Diodes Incorporated | 10 | 300 | ±2% | 20 | 200 nA @ 7V | 900 mV @ 10mA | -65 to 150 | TR |
| BZX84C10-7-F | Diodes Incorporated | 10 | 300 | ±6% | 20 | 200 nA @ 7V | 900 mV @ 10mA | -65 to 150 | CT & Digi-Reel® |
| BZX84C10-TP | Micro Commercial Co | 10 | 350 | ±5% | 20 | 200 nA @ 7V | 900 mV @ 10mA | -55 to 150 | TR |
| DDZX10C-13 | Diodes Incorporated | 10 | 300 | ±3% | 8 | 100 nA @ 8V | 900 mV @ 10mA | -65 to 150 | TR |
| DDZX10C-7 | Diodes Incorporated | 10 | 300 | ±3% | 8 | 100 nA @ 8V | 900 mV @ 10mA | -65 to 150 | TR |
| MMBZ5240B-7-F | Diodes Incorporated | 10 | 350 | ±5% | 17 | 3 µA @ 8V | 900 mV @ 10mA | -65 to 150 | TR |
| BZX84C10 TR PBFREE | Central Semiconductor Corp | 10 | 350 | ±5% | 20 | 200 nA @ 7V | 900 mV @ 10mA | -65 to 150 | TR |
Engineering Selection Recommendations
Primary Substitutes (Full Equivalence):
BZX84C10-TP (Micro Commercial Co) and BZX84C10 TR PBFREE (Central Semiconductor Corp) provide direct functional equivalence to CZRT55C10-G. Both maintain 350mW power rating, 10V nominal Zener voltage, 20 Ohms maximum impedance, and identical reverse leakage specifications. Both are Active product status with ROHS3 compliance and MSL 1 rating. BZX84C10-TP operates across -55°C to 150°C, which covers the primary operating range of the original part.
Secondary Substitutes (Reduced Power Rating):
BZX84B10-7-F, BZX84C10-7-F, DDZX10C-13, and DDZX10C-7 (all Diodes Incorporated) are suitable where 300mW power dissipation meets application requirements. These parts maintain 10V nominal voltage, SOT-23-3 packaging, and full temperature range operation (-65°C to 150°C). BZX84B10-7-F offers tighter ±2% tolerance. DDZX10C series provides superior impedance characteristics (8 Ohms maximum) and lower reverse leakage (100nA @ 8V), beneficial for precision voltage regulation applications.
Alternative with Modified Leakage Characteristics:
MMBZ5240B-7-F (Diodes Incorporated) matches 350mW power rating and 10V voltage but exhibits higher reverse leakage current (3µA @ 8V) compared to the original specification (200nA @ 7V). This part is suitable only for applications where reverse leakage current is not a critical parameter.
All substitute parts maintain RoHS3 compliance, MSL 1 rating, and Active product status, ensuring regulatory and environmental compatibility with the original CZRT55C10-G.
Frequently Asked Questions (FAQ)
Q: Can BZX84B10-7-F replace CZRT55C10-G in all applications?
A: BZX84B10-7-F is functionally compatible for applications where 300mW power dissipation is sufficient. The original CZRT55C10-G is rated for 350mW. If your circuit dissipates more than 300mW, this substitute is not appropriate. Both parts share identical 10V nominal voltage, SOT-23-3 package, and operating temperature range.
Q: What is the difference between BZX84C10-7-F and BZX84C10-TP?
A: Both are 10V, 300mW Zener diodes in SOT-23-3 packages from different manufacturers. BZX84C10-7-F (Diodes Incorporated) is supplied in Cut Tape and Digi-Reel packaging with 62,400 units in stock. BZX84C10-TP (Micro Commercial Co) is supplied in Tape & Reel with 2,840 units in stock. Electrical specifications are identical. Selection depends on packaging preference and inventory availability.
Q: Why do DDZX10C-7 and DDZX10C-13 have lower impedance (8 Ohms vs. 20 Ohms)?
A: Lower impedance indicates better voltage regulation stability and reduced dynamic resistance. DDZX10C series components are designed for precision voltage reference applications. This is a performance advantage, not a limitation. Both parts are direct substitutes for CZRT55C10-G.
Q: Is MMBZ5240B-7-F suitable as a substitute?
A: MMBZ5240B-7-F matches the 350mW power rating and 10V voltage specification. However, it exhibits significantly higher reverse leakage current (3µA @ 8V) compared to CZRT55C10-G (200nA @ 7V). Use this part only if your application does not require low reverse leakage characteristics.
Q: What does "TR PBFREE" mean in BZX84C10 TR PBFREE?
A: TR indicates Tape & Reel packaging format. PBFREE designates lead-free (Pb-free) manufacturing, confirming RoHS3 compliance. This part is electrically identical to other BZX84C10 variants and is suitable for all applications requiring lead-free components.
Q: Can I use a substitute with tighter tolerance (±2% or ±3%) instead of ±6%?
A: Yes. Tighter tolerance is a performance improvement, not a limitation. BZX84B10-7-F (±2%) and DDZX10C series (±3%) provide more precise voltage regulation than the original ±6% specification. These are direct substitutes with enhanced accuracy.
Q: Does operating temperature range affect substitution?
A: BZX84C10-TP operates from -55°C to 150°C, while CZRT55C10-G operates from -65°C to 150°C. If your application requires operation below -55°C, BZX84C10-TP is not suitable. All other substitutes maintain the full -65°C to 150°C range.
Q: Are all substitutes RoHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 Compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original CZRT55C10-G specifications.
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