P6KE51CA STMicroelectronics TVS Diode (Bi-directional) (Diodes, Axial Diameter Horizontal Mounting) In Stock
P6KE51CA is an STMicroelectronics bidirectional transient voltage suppressor (TVS) diode rated at 600 W peak pulse power with a 51 V standoff voltage and 91 V maximum clamping voltage. It provides robust ESD and surge protection for AC and DC power lines. Available in an axial through-hole package for ease of PCB assembly.
- Manufacturer
- STMicroelectronics
- Package
- Diodes, Axial Diameter Horizontal Mounting
- Pin Count
- 2
- Lifecycle
- OBSOLETE
- Datasheet
- P6KE51CA Datasheet PDF
- Category
- TVS Diode (Bi-directional)
- Price
- From $0.0514(MOQ 1)
- Temp Range
- ?°C to 175.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 600 W peak pulse power dissipation at 10/1000 µs waveform for heavy surge handling
- 51 V nominal breakdown voltage (48.5–53.6 V range) for 48 V line protection
- Bidirectional configuration for AC or dual-polarity DC circuit protection
- 91 V maximum clamping voltage, limiting transient stress on downstream components
- Low diode capacitance from 375 pF enabling use in moderate-frequency signal lines
- Silicon TVS technology for fast sub-nanosecond response to transient events
Applications
P6KE51CA is used to protect 48 V power supply rails, industrial control I/O ports, and telecom line interfaces from ESD events and lightning-induced surges. Its bidirectional clamping and 600 W peak pulse capability make it suitable for motor drive inputs, solar inverter protection circuits, and signal line surge suppressors.
Specifications
| YTEOL | 0 |
| Breakdown Voltage-Max | 53.6V |
| Breakdown Voltage-Min | 48.5V |
| Breakdown Voltage-Nom | 51V |
| Case Connection | ISOLATED |
| Clamping Voltage-Max | 91V |
| Configuration | SINGLE, 1 CHANNEL |
| Diode Capacitance-Min | 375pF |
| Diode Element Material | SILICON |
| Diode Type | TRANS VOLTAGE SUPPRESSOR DIODE |
| JESD-30 Code | O-PALF-W2 |
| 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 | UL RECOGNIZED |
| Rep Pk Reverse Voltage-Max | 43.6V |
| Reverse Current-Max | 5 µA |
| Reverse Test Voltage | 43.6V |
| Surface Mount | NO |
| Technology | AVALANCHE |
| 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
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How much peak pulse energy can P6KE51CA absorb in a 10/1000 µs surge waveform?
P6KE51CA is rated for 600 W peak pulse power dissipation using the standard 10/1000 µs waveform, allowing it to absorb transient surges on 48 V rails without permanent degradation under single-pulse conditions.
At what voltage will P6KE51CA clamp a transient to protect downstream ICs on a 48 V bus?
The maximum clamping voltage of P6KE51CA is 91 V at the rated peak pulse current, so components on the 48 V bus see no more than 91 V during a protected transient event, keeping them within typical absolute maximum ratings.
Is P6KE51CA suitable for AC signal line protection, given its bidirectional rating?
Yes. The CA suffix denotes a bidirectional TVS, meaning the 51 V nominal breakdown applies in both polarities, making P6KE51CA appropriate for AC-coupled signal lines, relay coil flyback suppression, and dual-rail power buses.
How does the 375 pF minimum capacitance of P6KE51CA affect its use on high-frequency signal lines?
At 375 pF the device introduces noticeable capacitive loading above a few MHz. P6KE51CA is best suited for DC power lines or low-frequency control signals below 1 MHz; higher-frequency signal lines should use lower-capacitance TVS alternatives.
Related Guides
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
ADAQ7768-1 Design Guide for Precision Vibration and Dynamic Signal Measurement
Design ADAQ7768-1 precision data acquisition channels for vibration and dynamic sensing with the right bandwidth, reference, clock, and layout choices.
Jun 30, 2026
AD5204BRZ10 Design Guide for SPI-Controlled Gain and Offset Calibration
Design AD5204BRZ10 digital potentiometer calibration loops with bounded trim span, safe wiper current, clean SPI routing, and reliable startup codes.
Jun 30, 2026
Why Buy from FindMyChip
About STMicroelectronics
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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.1100 | $0.11 |
| 100+ | $0.0988 | $9.88 |
| 250+ | $0.0961 | $24.03 |
| 500+ | $0.0750 | $37.50 |
| 1000+ | $0.0605 | $60.50 |
| 3000+ | $0.0514 | $154.20 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”