My Inquiry
My Account
onsemi P6KE51ARL
- Part No.:
- P6KE51ARL
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- T-18, Axial
- Datasheet:
-
P6KE51ARL.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,102
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P6KE51ARL from ON Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in axial-leaded Surmetic-40 package, designed for parallel clamping of high-energy transients. It delivers 600 W peak pulse power at 1 ms, clamps to 70.1 V at 8.6 A peak pulse current, and features <1 ns response time with 43.6 V working peak reverse voltage - deployed in industrial power supplies and communication interfaces.
For engineers reviewing the P6KE51ARL datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system DC bus voltage, VC margin below IC absolute maximum ratings, surge current capability per IEC 61000-4-5 Level 4, and UL 497B recognition for isolated loop protection.
Technical Context
The P6KE51ARL operates as a silicon avalanche diode, triggered when reverse voltage exceeds its 48.5–53.6 V breakdown range (VBR @ IT = 1 mA). Its clamping action limits transient-induced overvoltage to ≤70.1 V under 8.6 A IPP, with thermal resistance of 20 °C/W enabling reliable power dissipation in leaded-mount configurations.
Designed for non-repetitive surge suppression, it complies with UL 497B for isolated loop circuit protection and exhibits <5 µA leakage above 10 V. Its 1 ns typical response time and low temperature coefficient (0.102 %/°C) ensure stable clamping across operating temperatures from −55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W @ 1 ms - sustains single high-energy surges without failure per Figure 4 waveform |
| Working Peak Reverse Voltage (VRWM) | 43.6 V - maximum continuous reverse voltage before significant leakage; sets minimum system operating voltage compatibility |
| Clamping Voltage (VC) | 70.1 V @ 8.6 A IPP - maximum voltage seen by protected circuit during worst-case surge |
| Breakdown Voltage (VBR) | 48.5–53.6 V @ 1 mA - defines precise avalanche onset threshold for design margining |
| Leakage Current (IR) | <5 µA @ 43.6 V - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| Response Time | <1 ns - enables effective suppression of fast-rising ESD and lightning-induced transients |
| UL Recognition | UL 497B (File #E210057) - certified for use in isolated loop telecom and industrial interface protection |
Pinout & Package
Surmetic-40 axial-leaded plastic package (Case 017AA), cathode indicated by polarity band. Leads are solderable per 260 °C / 10 s at 1/16″ from case. Mounting position unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node; completes clamping path during reverse surge |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., DC input, data line); carries full surge current into ground via anode |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse rating | Supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge testing without degradation |
| UL 497B certification | Validated for safety-critical isolated loop protection in telecom and process control systems |
| ESD robustness | Class 3 HBM (>16 kV) - withstands handling and board-level ESD events pre-deployment |
| Low temperature coefficient | 0.102 %/°C - maintains consistent clamping voltage across industrial temperature range |
| Pb-free option available | P6KE51ARLG variant meets RoHS and JEDEC J-STD-020 reflow requirements |
Applications
| Industrial Power Supply Input Protection | RS-485/422 Data Line Clamping |
|---|---|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between input rail and chassis ground to clamp positive surges. Use Value: Limits transient voltage to 70.1 V, protecting downstream DC-DC controllers rated for 75 V absolute max. |
Use Scenario: Full-duplex RS-485 transceiver in factory automation network subjected to cable discharge events. IC Role / Device Role / Timing Role: Cathode tied to A/B differential lines, anode to local ground - clamps common-mode surges on bus conductors. Use Value: Prevents latch-up in SN65HVD7x-series transceivers by holding line voltage within ±12 V common-mode range. |
| Medical Equipment AC/DC Adapter Interface | Point-of-Sale Terminal Power Entry |
Use Scenario: Secondary-side 24 V output of medical-grade AC/DC adapter connected to patient-monitor sensor module. IC Role / Device Role / Timing Role: TVS on 24 V supply rail to absorb coupling from nearby MRI RF pulses or ESD discharge. Use Value: Ensures <5 µA leakage preserves low-power sleep mode current budget while suppressing sub-10 ns transients. |
Use Scenario: 12 V input of retail POS terminal with external power brick, subject to hot-plug and lightning-induced surges. IC Role / Device Role / Timing Role: Primary-line TVS on DC jack input, coordinated with fuse and common-mode choke. Use Value: UL 497B listing satisfies UL 60950-1 Annex G requirements for secondary circuit surge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A | Surface-mount SMB package (vs. axial P6KE51ARL); same 51 V VBR range but lower 600 W rating derated at higher ambient temps | Requires PCB redesign; better suited for automated SMT assembly and space-constrained designs | Select SMBJ51A when board real estate is limited and thermal management uses copper pour rather than lead conduction |
| 1.5KE51A | Higher 1500 W peak power rating; larger DO-201AE package; 73.5 V clamping vs. P6KE51ARL's 70.1 V | Used where higher surge margin is required (e.g., outdoor telecom cabinets), but adds mechanical bulk and cost | Choose 1.5KE51A only if system-level testing confirms need for >600 W headroom and layout accommodates larger body |
Compared with SMBJ51A and 1.5KE51A, the P6KE51ARL offers optimal balance of axial-leaded serviceability, UL 497B compliance, and tight 70.1 V clamping - making it preferred for field-serviceable industrial power entry modules and legacy through-hole designs requiring certified loop protection.
Availability
P6KE51ARL is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 communication interfaces, and medical equipment power entry points requiring stable component supply and long-term obsolescence management.
Supply support for P6KE51ARL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
ON Semiconductor (now onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The P6KE51ARL belongs to the P6KE6.8A Series of axial-leaded transient voltage suppressors, engineered specifically for cost-sensitive, high-reliability surge protection in industrial and communications infrastructure where UL recognition and proven surge endurance are mandatory.
FAQ
What is the clamping voltage of the P6KE51ARL and how is it measured?
The P6KE51ARL has a maximum clamping voltage (VC) of 70.1 V, measured at a peak pulse current (IPP) of 8.6 A using the 1 ms exponential waveform defined in Figure 4 of the datasheet. This value represents the highest voltage the device allows across its terminals during a standardized surge event, ensuring downstream components remain within safe operating limits. The P6KE51ARL achieves this clamping performance consistently across its specified temperature range.
Does the P6KE51ARL meet UL safety standards for circuit protection?
Yes, the P6KE51ARL is UL Recognized under standard UL 497B (File #E210057) for isolated loop circuit protection. This certification covers dielectric withstand, endurance conditioning, and strike voltage breakdown testing - confirming suitability for telecom, process control, and other safety-critical applications. The P6KE51ARL shares this UL listing with the full P6KE6.8A–P6KE200A series, unlike many competing TVS diodes with partial or no UL coverage.
What is the difference between P6KE51ARL and P6KE51AG?
The P6KE51ARL is supplied in tape-and-reel packaging (4000 units per reel), while the P6KE51AG is packaged in 1000-unit boxes with axial leads. Both share identical electrical specifications, Surmetic-40 package dimensions, and Pb-free construction. The "RL" suffix denotes reel format optimized for automated assembly, whereas "G" indicates Pb-free compliance in bulk packaging - the P6KE51ARL itself is also Pb-free per onsemi's documentation.
Can the P6KE51ARL be used for bidirectional transient suppression?
No, the P6KE51ARL is a unidirectional TVS diode and must be used with correct polarity: cathode to the protected line, anode to ground. It does not suppress positive transients on the anode side. For bidirectional protection, a separate device such as P6KE51CA or a dedicated bidirectional TVS array is required. Using the P6KE51ARL in reverse orientation risks permanent damage due to forward conduction during normal operation.
What is the thermal resistance and steady-state power rating of the P6KE51ARL?
The P6KE51ARL has a junction-to-lead thermal resistance (RJL) of 20 °C/W and a steady-state power dissipation (PD) of 5.0 W at TL ≤ 25 °C with 3/8″ lead length. Power derates linearly above 50 °C at 50 mW/°C. This thermal profile supports reliable operation in through-hole mounted industrial environments where heat is conducted primarily through leads rather than PCB copper, distinguishing it from surface-mount alternatives with different thermal paths.
P6KE51ARL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- T-18, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 8.6A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
P6KE51ARL FAQ
1.How can I place an order for P6KE51ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE51ARL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for P6KE51ARL reliable?
The price and inventory of P6KE51ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE51ARL is usually 5 days.
3.What payment methods are accepted for P6KE51ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE51ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE51ARL?
P6KE51ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE51ARL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for P6KE51ARL?
For technical support, including P6KE51ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE51ARL requirements.
6.How does Aetrix verify that P6KE51ARL is sourced from the original manufacturer or authorized distributors?
All P6KE51ARL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that P6KE51ARL meets industry standards.
7.What is the process for return or replacement of P6KE51ARL?
All P6KE51ARL units undergo pre-shipment inspection (PSI). If there is an issue with P6KE51ARL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The P6KE51ARL part is unused and in its original packaging.
Return procedure for P6KE51ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE51ARL Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
