Part A
5.0SMDJ33CA
Rectron USA
- Lifecycle
- Active
- Stock
- 1980 PCS
- Package
- DO-214AB
- Series
- TVS - Diodes
Replacement verdict
Compatible functional replacement candidate
The 5.0SMDJ33CA is a viable functional replacement candidate for the 5.0SMDJ30CA in most unidirectional TVS applications, sharing the same SMC package, 5000 W peak pulse power rating, and bidirectional configuration. The primary difference is the standoff voltage, which shifts the breakdown and clamping characteristics; designers must verify that the higher standoff and clamping voltages of the 5.0SMDJ33CA remain within the safe operating limits of the protected circuit.
Peak Pulse Power Rating
High match
Package Type
High match
Polarity Configuration
High match
Standoff Voltage
Validation required
Parts at a glance
Part B
5.0SMDJ30CA
Rectron USA
- Lifecycle
- Active
- Stock
- 6597 PCS
- Package
- DO-214AB
- Series
- TVS - Diodes
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 5.0SMDJ30CA | 5.0SMDJ33CA | Why it matters |
|---|---|---|---|
| Reverse Standoff Voltage (Vr) | 30 V | 33 V | Determines the maximum continuous DC voltage the TVS diode can withstand without conducting; must exceed the normal operating voltage of the protected circuit. |
| Breakdown Voltage (Vbr) Min | 33.3 V | 36.7 V | The minimum voltage at which the device begins to conduct; defines the lower edge of the clamping window and must be above the circuit's normal operating voltage. |
| Breakdown Voltage (Vbr) Max | 36.8 V | 40.6 V | The maximum voltage at which breakdown is guaranteed; sets the upper edge of the transition region before full clamping occurs. |
| Clamping Voltage (Vc) at Ipp | 48.4 V | 53.3 V | The peak voltage the protected load sees during a surge event; lower clamping voltage provides better protection for sensitive downstream components. |
| Test Current (It) | 1 mA | 1 mA | The current at which breakdown voltage is specified; ensures consistent measurement conditions for comparing Vbr between devices. |
| Peak Pulse Current (Ipp) | 103.3 A | 93.8 A | Maximum surge current the device can handle for a 10/1000 µs waveform; higher Ipp indicates greater surge absorption capability. |
| Peak Pulse Power (Ppp) | 5000 W | 5000 W | Rated peak power dissipation for a 10/1000 µs pulse; defines the overall surge energy handling class of the TVS diode. |
| Reverse Leakage Current (Ir) | 5 µA | 5 µA | Leakage current at the standoff voltage; lower leakage reduces power loss and avoids false triggering in low-power circuits. |
| Package | SMC (DO-214AB) | SMC (DO-214AB) | Physical footprint and thermal characteristics; identical packages allow direct drop-in replacement without PCB layout changes. |
| Operating Temperature Range | -55 °C to +150 °C | -55 °C to +150 °C | Defines the environmental conditions under which the device maintains its electrical specifications; must cover the application's thermal profile. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 5.0SMDJ33CA | 5.0SMDJ30CA |
|---|---|---|
| Series | 5.0SMDJ | 5.0SMDJ |
| Part Status | Active | Active |
| Type | Zener | Zener |
| Bidirectional Channels | 1 | 1 |
| Voltage - Reverse Standoff (Typ) | 36.7V | 33.3V |
| Voltage - Clamping (Max) @ Ipp | 53.3V | 48.4V |
| Power - Peak Pulse | 5000W (5kW) | 5000W (5kW) |
| Power Line Protection | No | No |
| Applications | General Purpose | General Purpose |
| Operating Temperature | -55°C ~ 150°C (TJ) | -55°C ~ 150°C (TJ) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the 5.0SMDJ30CA and 5.0SMDJ33CA TVS diodes?
The primary difference is the standoff voltage and breakdown voltage. The 5.0SMDJ30CA has a reverse standoff voltage of 30 V, a minimum breakdown voltage of 33.3 V, and a maximum clamping voltage of 48.4 V at 103 A. The 5.0SMDJ33CA has a reverse standoff voltage of 33 V, a minimum breakdown voltage of 36.7 V, and a maximum clamping voltage of 53.3 V at 93.9 A. Both are bidirectional 5000 W peak pulse power TVS diodes in the SMC (DO-214AB) package.
Are the 5.0SMDJ30CA and 5.0SMDJ33CA pin-to-pin compatible?
Yes. Both devices are offered in the same SMC (DO-214AB) surface-mount package with identical footprint and pin configuration. They are bidirectional TVS diodes, so they are not polarity sensitive and can be placed in either orientation on the PCB.
Can the 5.0SMDJ30CA be used as a direct replacement for the 5.0SMDJ33CA?
Not as a direct drop-in replacement without circuit evaluation. The 5.0SMDJ30CA has a lower standoff voltage (30 V vs 33 V) and lower clamping voltage (48.4 V vs 53.3 V), which may provide tighter protection but could conduct at lower transient levels. The 5.0SMDJ33CA offers a higher standoff voltage, making it suitable for circuits with higher normal operating voltages. The designer must verify that the lower standoff voltage of the 5.0SMDJ30CA does not exceed the working voltage of the protected circuit.
What is the peak pulse power rating of these devices?
Both the 5.0SMDJ30CA and 5.0SMDJ33CA are rated for 5000 W peak pulse power dissipation at 10/1000 µs waveform. This rating is specified at a maximum junction temperature of 150 °C with proper heat sinking or PCB layout considerations.
What is the maximum clamping voltage of each device?
The 5.0SMDJ30CA has a maximum clamping voltage of 48.4 V at a peak pulse current of 103 A. The 5.0SMDJ33CA has a maximum clamping voltage of 53.3 V at a peak pulse current of 93.9 A. These values are measured at the 10/1000 µs waveform.
What are the operating junction temperature ranges for these TVS diodes?
Both the 5.0SMDJ30CA and 5.0SMDJ33CA are specified for an operating junction temperature range of -55 °C to +150 °C. This wide temperature range makes them suitable for industrial and automotive applications where extreme temperatures are common.
Are these devices RoHS compliant and halogen-free?
Yes. Both the 5.0SMDJ30CA and 5.0SMDJ33CA are RoHS compliant and halogen-free, as confirmed by manufacturer datasheets and distributor product pages. They meet current environmental and safety regulations for electronic components.
What are the typical applications for the 5.0SMDJ30CA and 5.0SMDJ33CA?
These TVS diodes are typically used for transient voltage suppression in industrial equipment, telecommunications systems, automotive electronics, and consumer electronics. The 5.0SMDJ30CA is often selected for 24 V or 28 V systems, while the 5.0SMDJ33CA is suited for 28 V or 30 V systems, depending on the required standoff voltage margin.