P6KE33CARL STMicroelectronics Diode (Diodes, Axial Diameter Horizontal Mounting) In Stock
The P6KE33CARL is a 600W bidirectional transient voltage suppressor (TVS) diode with a 33V nominal breakdown voltage and a maximum clamping voltage of 59V in a DO-204AC axial package. It protects sensitive circuits from ESD, lightning, and switching transients on 28V supply rails and signal lines. Available worldwide with fast shipping.
- Manufacturer
- STMicroelectronics
- Package
- Diodes, Axial Diameter Horizontal Mounting
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- P6KE33CARL Datasheet PDF
- Category
- Diode
- Temp Range
- -55.0°C to 175.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 600W peak pulse power dissipation handles large transient surge events on 28V–33V protected rails
- Bidirectional (CA) configuration provides symmetric protection for AC signal lines and reverse-polarity conditions
- 33V nominal breakdown voltage with 31.4V to 34.7V range suits 24V and 28V industrial and automotive rail protection
- Maximum 59V clamping voltage limits overstress on downstream components during transient events
- DO-204AC axial package supports through-hole PCB assembly with standard lead spacing for easy hand or wave soldering
Applications
The P6KE33CARL is used to protect 24V and 28V DC supply rails, RS-485 communication lines, and sensor inputs in industrial control systems, automotive electronics, and telecommunications equipment from destructive transient overvoltage events. Its bidirectional configuration makes it well suited for AC-coupled signal paths and reverse-polarity protection scenarios without requiring orientation-specific placement. The UL-recognized device is appropriate for safety-certified equipment where transient protection components must meet recognized component standards.
Specifications
| YTEOL | 6 |
| Additional Feature | UL RECOGNIZED |
| Breakdown Voltage-Max | 34.7V |
| Breakdown Voltage-Min | 31.4V |
| Breakdown Voltage-Nom | 33V |
| Case Connection | ISOLATED |
| Clamping Voltage-Max | 59V |
| Configuration | SINGLE, 1 CHANNEL |
| Diode Capacitance-Min | 500pF |
| Diode Element Material | SILICON |
| Diode Type | TRANS VOLTAGE SUPPRESSOR DIODE |
| JEDEC-95 Code | DO-204AC |
| JESD-30 Code | O-PALF-W2 |
| JESD-609 Code | e3 |
| Non-rep Peak Rev Power Dis-Max | 600W |
| Number of Elements | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | ROUND |
| Package Style | LONG FORM |
| Polarity | BIDIRECTIONAL |
| Power Dissipation-Max | 5W |
| Qualification Status | Not Qualified |
| Reference Standard | IEC-61000-4-2, 4-4, 4-5; MIL-STD-750 |
| Rep Pk Reverse Voltage-Max | 28.2V |
| Reverse Current-Max | 0.5 µA |
| Reverse Test Voltage | 28.2V |
| Surface Mount | NO |
| Technology | AVALANCHE |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | WIRE |
| Terminal Position | AXIAL |
| Package | Diodes, Axial Diameter Horizontal Mounting |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8541.10.00.50 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for P6KE33CARL:
Frequently Asked Questions
What peak surge power can the P6KE33CARL handle and how does that protect a 28V industrial rail?
The P6KE33CARL absorbs 600W of peak pulse power in a standard 10/1000µs waveform, which is more than sufficient to absorb typical 28V industrial rail transients caused by inductive load switching or line coupling. When a surge appears on the 28V rail, the diode clamps the voltage to a maximum of 59V within nanoseconds, preventing that overvoltage from reaching downstream ICs, sensors, or microcontrollers connected to the same bus.
Is the P6KE33CARL unidirectional or bidirectional, and which circuit topologies benefit from the bidirectional CA version?
The P6KE33CARL is a bidirectional (CA) TVS diode, meaning it clamps transients of both polarities symmetrically, making it ideal for AC signal lines, RS-485 differential bus protection, and reverse-polarity scenarios on DC rails. Unidirectional diodes would block only positive transients; the CA version provides equal protection in both directions, which is critical when the protected node can swing above and below the circuit ground reference during normal operation.
What is the breakdown voltage range of the P6KE33CARL and how does this range affect design margin?
The P6KE33CARL has a breakdown voltage range of 31.4V minimum to 34.7V maximum, with a nominal value of 33V at the specified test current. Designers protecting a 28V rail benefit from this range because the minimum 31.4V breakdown guarantees the diode will not conduct during normal 28V operation, while the 59V maximum clamp voltage provides at least 1V of margin below the breakdown voltage of most 60V-rated downstream components, ensuring adequate protection without nuisance triggering.
How does the 500pF minimum capacitance of the P6KE33CARL affect its suitability for high-speed data line protection?
The P6KE33CARL has a minimum diode capacitance of 500pF, which limits its useful bandwidth to roughly a few megahertz — appropriate for low-frequency industrial analog signals, power rails, and RS-485 lines (which typically operate at 10Mbps or less over short distances) but not suitable for protecting USB 3.0, HDMI, or multi-gigabit Ethernet lines. For high-speed digital interfaces above 100Mbps, low-capacitance TVS diodes in the 0.5pF to 5pF range should be selected instead.
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STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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