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BZX84C5V1-7 Equivalent & Substitute Parts
Part Overview
The BZX84C5V1-7 is a 5.1 V zener diode rated for 300 mW power dissipation in a surface mount SOT-23-3 package, manufactured by Diodes Incorporated. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs. Equivalent parts maintain identical electrical specifications, while substitute parts offer compatible performance within defined parameter tolerances for 5.1 V zener applications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Zener (Nom) | 5.1 | V |
| Tolerance | ±6% | — |
| Power - Max | 300 | mW |
| Impedance (Max) | 60 | Ohms |
| Current - Reverse Leakage @ Vr | 2 | µA @ 2 V |
| Voltage - Forward (Vf) (Max) @ If | 900 | mV @ 10 mA |
| Operating Temperature | -65 to 150 | °C |
| Mounting Type | Surface Mount | — |
| Package / Case | TO-236-3, SC-59, SOT-23-3 | — |
Substitute Part Grouping Explanation
Substitution of the BZX84C5V1-7 is determined by the following critical parameters:
Primary Substitution Criteria:
- Zener voltage: 5.1 V nominal
- Package compatibility: SOT-23-3 / TO-236-3 / SC-59 surface mount
- Operating temperature range: -65°C to 150°C minimum
- Forward voltage: 900 mV maximum @ 10 mA
- Reverse leakage current: 2 µA @ 2 V maximum
Secondary Compatibility Factors:
- Power rating: 300 mW or greater
- Impedance: 60 Ohms maximum
- Tolerance: ±6% or tighter acceptable
Substitute parts are grouped into three categories based on electrical equivalence and manufacturing source: direct manufacturer equivalents from Diodes Incorporated with identical specifications, parametric equivalents with improved tolerance or power ratings from alternative manufacturers, and manufacturer-recommended alternatives with comparable performance characteristics.
Parameter Comparison
| Part Number | Manufacturer | Vz (V) | Tolerance | Power (mW) | Zzt (Ohms) | Vf @ 10mA (mV) | Package | Product Status | RoHS |
|---|---|---|---|---|---|---|---|---|---|
| BZX84C5V1-7 | Diodes Incorporated | 5.1 | ±6% | 300 | 60 | 900 | SOT-23-3 | Discontinued | Non-compliant |
| BZX84C5V1-7-F | Diodes Incorporated | 5.1 | ±6% | 300 | 60 | 900 | SOT-23-3 | Active | ROHS3 Compliant |
| BZX84B5V1-7-F | Diodes Incorporated | 5.1 | ±2% | 300 | 60 | 900 | SOT-23-3 | Active | ROHS3 Compliant |
| BZX84C5V1 TR PBFREE | Central Semiconductor Corp | 5.1 | ±5% | 350 | 60 | 900 | SOT-23-3 | Active | ROHS3 Compliant |
| BZX84-A5V1,215 | Nexperia USA Inc. | 5.1 | ±1% | 250 | 60 | 900 | TO-236AB | Active | ROHS3 Compliant |
| BZX84-A5V1,235 | Nexperia USA Inc. | 5.1 | ±1% | 250 | 60 | 900 | TO-236AB | Active | ROHS3 Compliant |
| BZX84-C5V1,215 | Nexperia USA Inc. | 5.1 | ±5% | 250 | 60 | 900 | TO-236AB | Active | ROHS3 Compliant |
| BZX84-C5V1,235 | NXP USA Inc. | 5.1 | ±5% | 250 | 60 | 900 | SOT-23 | Active | Not specified |
| BZX84B5V1LT1G | onsemi | 5.1 | ±2% | 225 | 60 | 900 | SOT-23-3 | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Equivalent (Recommended Primary Substitute):
BZX84C5V1-7-F from Diodes Incorporated is the direct functional equivalent with identical electrical specifications. This part maintains 5.1 V nominal zener voltage, ±6% tolerance, 300 mW power rating, and SOT-23-3 package compatibility. The primary distinction is product status: BZX84C5V1-7-F is active with ROHS3 compliance, addressing the discontinued status of the original part. This substitution requires no circuit redesign.
Improved Tolerance Alternative:
BZX84B5V1-7-F from Diodes Incorporated provides tighter ±2% tolerance while maintaining identical 5.1 V zener voltage, 300 mW power rating, and SOT-23-3 package. This part is active and ROHS3 compliant. The improved tolerance specification supports applications requiring enhanced voltage regulation precision.
Higher Power Rating Alternative:
BZX84C5V1 TR PBFREE from Central Semiconductor Corp offers 350 mW power rating versus the original 300 mW specification, with 5.1 V zener voltage and SOT-23-3 package compatibility. Tolerance is ±5%, within acceptable range. This part accommodates higher power dissipation requirements in the same package footprint.
Lower Power Alternatives with Improved Tolerance:
BZX84-A5V1,215 and BZX84-A5V1,235 from Nexperia USA Inc. provide ±1% tolerance with 5.1 V zener voltage. Power rating is 250 mW, lower than the original 300 mW specification. These parts are suitable for applications where power dissipation is not a limiting factor and voltage regulation precision is prioritized. Package is TO-236AB, mechanically compatible with SOT-23-3.
Standard Tolerance Alternatives:
BZX84-C5V1,215 and BZX84-C5V1,235 from Nexperia and NXP USA Inc. maintain ±5% tolerance with 5.1 V zener voltage and 250 mW power rating. These parts are active and suitable for general-purpose 5.1 V zener applications with standard tolerance requirements.
Alternative Manufacturer Option:
BZX84B5V1LT1G from onsemi provides ±2% tolerance, 5.1 V zener voltage, and SOT-23-3 package. Power rating is 225 mW. This part is active and ROHS3 compliant, offering an alternative sourcing option with improved tolerance specification.
Frequently Asked Questions (FAQ)
Q: Can BZX84C5V1-7-F be used as a direct replacement for BZX84C5V1-7?
A: Yes. BZX84C5V1-7-F is electrically and mechanically identical to BZX84C5V1-7, with identical 5.1 V zener voltage, ±6% tolerance, 300 mW power rating, and SOT-23-3 package. The primary difference is product status: BZX84C5V1-7-F is active and ROHS3 compliant. No circuit modifications are required.
Q: What is the difference between BZX84C5V1-7-F and BZX84B5V1-7-F?
A: Both parts share identical 5.1 V zener voltage, 300 mW power rating, and SOT-23-3 package. The distinction is tolerance specification: BZX84C5V1-7-F has ±6% tolerance, while BZX84B5V1-7-F has ±2% tolerance. The tighter tolerance of BZX84B5V1-7-F provides improved voltage regulation precision for applications requiring enhanced accuracy.
Q: Are the Nexperia BZX84-A5V1 and BZX84-C5V1 parts compatible with the original BZX84C5V1-7?
A: Nexperia parts maintain 5.1 V zener voltage and SOT-23-3 / TO-236AB package compatibility. However, power rating is reduced to 250 mW compared to the original 300 mW specification. These parts are suitable for applications where power dissipation does not exceed 250 mW. Verify circuit power requirements before substitution.
Q: What is the significance of the TO-236AB package designation versus SOT-23-3?
A: TO-236AB and SOT-23-3 are equivalent package designations for the same three-lead surface mount component. Both refer to the same physical footprint and pin configuration. Parts specified with either designation are mechanically and electrically interchangeable in the same PCB layout.
Q: Can BZX84C5V1 TR PBFREE from Central Semiconductor be used in place of the original part?
A: Yes. BZX84C5V1 TR PBFREE maintains 5.1 V zener voltage and SOT-23-3 package compatibility. The primary advantage is higher 350 mW power rating compared to the original 300 mW specification. Tolerance is ±5%, within acceptable range. This part is suitable for applications requiring higher power dissipation capability.
Q: What does ROHS3 compliance mean for zener diode selection?
A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. The original BZX84C5V1-7 is RoHS non-compliant. All active substitute parts listed are ROHS3 compliant, meeting current environmental and regulatory standards for electronic component manufacturing.
Q: Are there any substitutes with lower power ratings that would still be compatible?
A: Yes. BZX84-A5V1,215, BZX84-A5V1,235, BZX84-C5V1,215, and BZX84B5V1LT1G all have power ratings between 225 mW and 250 mW. These parts are suitable only if circuit power dissipation does not exceed their respective ratings. Verify that the zener diode operates within the specified power envelope before selecting a lower-rated substitute.
Q: What tolerance specification should be selected for voltage regulation applications?
A: Tolerance selection depends on circuit requirements. For general-purpose applications, ±5% or ±6% tolerance is acceptable. For precision voltage regulation, ±2% tolerance (BZX84B5V1-7-F, BZX84B5V1LT1G) or ±1% tolerance (BZX84-A5V1,215, BZX84-A5V1,235) provides improved voltage accuracy. Consult circuit design specifications to determine minimum acceptable tolerance.
Q: Is the impedance specification critical for substitution?
A: All listed substitute parts maintain 60 Ohms maximum impedance, identical to the original BZX84C5V1-7 specification. Impedance affects high-frequency performance and transient response. Since all substitutes share this parameter, impedance is not a differentiating factor in part selection.
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