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TZX12X-TAP Equivalent & Substitute Parts
Part Overview
The TZX12X-TAP is an active-status Zener diode manufactured by Vishay General Semiconductor - Diodes Division, rated at 11.74 V nominal Zener voltage with 500 mW maximum power dissipation. This through-hole component is packaged in DO-35 (DO-204AH) axial configuration and supplied in Tape & Box format. The device is qualified to AEC-Q101 automotive standards and maintains ROHS3 compliance.
Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the critical parameters that define functional interchangeability within this Zener diode category.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Zener (Nom) | 11.74 | V |
| Power - Max | 500 | mW |
| Tolerance | ±2.51% | % |
| Impedance (Max) | 35 | Ohms |
| Mounting Type | Through Hole | — |
| Package / Case | DO-35, Axial | — |
| Operating Temperature (Max) | 175 | °C |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitution eligibility for Zener diodes is determined by matching the following critical parameters:
- Zener Voltage (Nominal): 11.74 V
- Maximum Power Dissipation: 500 mW
- Package Type: DO-35 axial through-hole
- Impedance (Maximum): 35 Ohms
- Regulatory Compliance: ROHS3 and REACH status
The NZX12X,133 manufactured by Nexperia USA Inc. satisfies all substitution criteria. Both devices operate at identical nominal Zener voltage and power rating, utilize the same DO-35 axial package configuration, and maintain equivalent maximum impedance specifications. Both components are ROHS3 compliant and REACH unaffected, ensuring regulatory alignment.
Parameter Comparison
| Parameter | TZX12X-TAP (Vishay) | NZX12X,133 (Nexperia) | Unit |
|---|---|---|---|
| Voltage - Zener (Nom) | 11.74 | 11.74 | V |
| Tolerance | ±2.51% | ±2% | % |
| Power - Max | 500 | 500 | mW |
| Impedance (Max) | 35 | 35 | Ohms |
| Voltage - Forward (Vf) (Max) @ If | 1.5 @ 200 mA | 1.5 @ 200 mA | V @ mA |
| Mounting Type | Through Hole | Through Hole | — |
| Package / Case | DO-35, Axial | DO-35, Axial | — |
| Operating Temperature (Max) | 175 | 175 | °C |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | — |
| REACH Status | REACH Unaffected | REACH Unaffected | — |
| Product Status | Active | Active | — |
Engineering Selection Recommendations
Both the TZX12X-TAP and NZX12X,133 are active-status components with full regulatory compliance. Selection between these devices is based on availability, packaging format preference, and supply chain requirements.
The TZX12X-TAP is supplied in Tape & Box format, while the NZX12X,133 is supplied in Cut Tape format. Both formats are standard for through-hole component distribution and do not affect electrical performance or mechanical compatibility.
The NZX12X,133 exhibits tighter Zener voltage tolerance (±2% versus ±2.51%), which may provide improved voltage regulation precision in applications requiring stricter tolerance control. Both devices maintain identical maximum impedance and forward voltage characteristics.
Current inventory levels indicate 10,513 units of NZX12X,133 available compared to 822 units of TZX12X-TAP, which may influence procurement decisions based on project volume and lead time requirements.
Frequently Asked Questions (FAQ)
Q: Can the NZX12X,133 be used as a direct replacement for the TZX12X-TAP?
A: Yes. Both devices share identical nominal Zener voltage (11.74 V), maximum power rating (500 mW), impedance specification (35 Ohms maximum), and DO-35 axial package configuration. Electrical performance and mechanical fit are equivalent.
Q: What is the difference in packaging between these two parts?
A: The TZX12X-TAP is supplied in Tape & Box format, while the NZX12X,133 is supplied in Cut Tape format. Both are standard distribution methods for through-hole axial components and do not affect circuit performance or board assembly compatibility.
Q: Does the tighter tolerance of the NZX12X,133 (±2% vs ±2.51%) affect substitution eligibility?
A: No. Tighter tolerance represents an improvement in specification and does not prevent substitution. The NZX12X,133 will perform within the voltage range required by circuits designed for the TZX12X-TAP.
Q: Are both parts automotive-qualified?
A: The TZX12X-TAP carries AEC-Q101 automotive qualification. The NZX12X,133 specifications provided do not include automotive qualification notation. Automotive applications requiring AEC-Q101 certification should verify qualification status with the manufacturer before substitution.
Q: What is the operating temperature range for each device?
A: The TZX12X-TAP specifies a maximum junction temperature of 175°C. The NZX12X,133 specifies an operating temperature range of -55°C to 175°C. Both devices operate at the same maximum temperature; the NZX12X,133 additionally defines the minimum operating temperature.
Q: Are there any regulatory compliance differences?
A: Both devices are ROHS3 compliant and REACH unaffected. Regulatory status is equivalent, and substitution does not introduce compliance concerns.
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