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Vishay General Semiconductor - Diodes Division P6KE18A/54
- Part No.:
- P6KE18A/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE18A/54.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,349
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Product details
Overview
P6KE18A/54 from Littelfuse is a unidirectional transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 17.1–18.9 V breakdown voltage (VBR), 15.3 V maximum working peak reverse voltage (VWM), and clamps to ≤25.2 V at 23.8 A peak pulse current (IPPM) under 10/1000 µs waveform - protecting sensitive ICs in industrial power supplies, telecom interfaces, and automotive control modules.
For engineers reviewing the P6KE18A/54 datasheet, P6KE18A/54 pinout, P6KE18A/54 application, or P6KE18A/54 equivalent, key selection criteria include its DO-204AC axial package, 600 W peak pulse power rating, low 0.088 %/°C temperature coefficient of VBR, sub-1 ps response time, and UL 497B listing for telecom surge protection.
Technical Context
The P6KE18A/54 uses a glass-passivated junction to achieve stable avalanche breakdown with tight VBR tolerance (±5% typical) and low incremental surge resistance. Its unidirectional polarity enables precise DC rail clamping without reverse conduction during normal operation.
It delivers 600 W peak pulse power per 10/1000 µs waveform at 0.01% duty cycle, with thermal derating above 25°C ambient per Fig. 2 and steady-state power dissipation of 5.0 W at 75°C lead temperature. Clamping performance is validated at IPPM = 23.8 A, where VC ≤ 25.2 V ensures safe voltage limiting for downstream 24 V logic and microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 17.1–18.9 V at 1.0 mA test current - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| Working Peak Reverse Voltage VWM | 15.3 V - maximum continuous DC or RMS voltage the device blocks without leakage exceeding 5 µA |
| Clamping Voltage VC | ≤25.2 V at 23.8 A IPPM - limits transient voltage seen by protected circuitry during 600 W surge events |
| Peak Pulse Power PPPM | 600 W (10/1000 µs waveform) - sustains high-energy transients common in industrial and telecom environments |
| Response Time | <1.0 ps - enables suppression before fast-rising ESD or lightning-induced surges damage silicon |
| Temperature Coefficient | 0.088 %/°C - ensures minimal VBR drift across –55°C to +175°C operating range |
| Leakage Current ID | <5.0 µA at VWM - negligible standby power loss and no false triggering in low-power systems |
Pinout & Package
Package: DO-204AC (JEDEC standard axial-leaded plastic case). Cathode identified by color band on body; anode is unmarked lead. Mountable in any orientation; weight 0.4 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded lead) | Current entry point during forward conduction | Connects to ground or low-side return path; conducts only during fault conditions when VAK > 3.5 V |
| Cathode (banded lead) | Current exit point during avalanche clamping | Connects to protected line; initiates avalanche when reverse voltage exceeds VBR, shunting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| UL 497B listing (E136766) | Validated for telecom interface protection including DSL, POTS, and T1/E1 line cards per industry safety standard |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage margin required for protected ICs - supports tighter design margins for 24 V systems |
| High-temp soldering rated | Survives 265°C/10 s wave soldering per MIL-STD-750 Method 2026 - compatible with standard PCB assembly processes |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: 24 V DC input channels exposed to load dump and inductive switching transients in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on terminal block inputs, placed upstream of TVS arrays and current-limiting resistors. Use Value: Limits transient voltage to ≤25.2 V during 600 W surges, preventing latch-up or gate oxide rupture in isolated RS-485 transceivers and analog front-end ADCs. |
Use Scenario: LIN bus and sensor supply lines subject to ISO 7637-2 Pulse 1/2a/5a transients in vehicle door modules and lighting controllers. IC Role / Device Role / Timing Role: Unidirectional rail protector on 12 V/24 V battery-fed subsystems, coordinated with fuse and polyfuse for fail-safe shutdown. Use Value: Sub-1 ps response ensures clamping before pulse edge reaches MCU GPIO pins, maintaining ASIL-B functional safety integrity. |
| Telecom DSL Line Cards | Medical Power Supply Inputs |
Use Scenario: Protection of ADSL/VDSL line drivers and transformers against lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: First-stage TVS in hybrid protection circuit with gas discharge tube (GDT) and series impedance. Use Value: UL 497B certification confirms compliance with GR-1089-CORE requirements for telecom central office and remote terminal applications. |
Use Scenario: Input stage protection on Class II medical AC/DC adapters handling EN 60601-1 15 kV ESD and 1 kV differential-mode surge tests. IC Role / Device Role / Timing Role: Secondary surge limiter after Y-capacitor and common-mode choke, guarding bridge rectifier and bulk capacitor. Use Value: Low leakage (<5 µA) prevents leakage current accumulation that could exceed 100 µA patient leakage limits in double-insulated designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | DO-214AA surface-mount package; same VBR (17.1–18.9 V), but lower 600 W rating applies to 10/1000 µs with 0.01% duty cycle - identical clamping (VC ≤ 25.2 V at 23.8 A) | Designed for automated SMT assembly; lacks axial leads for through-hole prototyping or high-vibration mechanical retention | Select SMBJ18A for space-constrained PCBs requiring reflow compatibility; retain P6KE18A/54 for manual assembly, serviceability, or legacy through-hole layouts. |
| 1.5KE18A | Same DO-204AC package and electrical specs, but rated for 1500 W peak pulse power (10/1000 µs); higher IPPM = 65.2 A and VC = 27.7 V | Used where higher single-event surge margin is required (e.g., outdoor telecom enclosures), but larger thermal mass increases response latency slightly | Choose 1.5KE18A when system-level testing reveals marginal margin with 600 W rating; P6KE18A/54 remains optimal for cost-sensitive, volume industrial designs meeting IEC 61000-4-5 Level 3. |
Compared with SMBJ18A and 1.5KE18A, P6KE18A/54 offers the lowest cost per unit in axial-leaded form factor while delivering verified 600 W surge capability, UL 497B compliance, and proven field reliability in telecom and industrial deployments - making it the preferred choice for balanced performance, manufacturability, and BOM cost.
Availability
P6KE18A/54 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and telecom DSL line cards requiring stable component supply, long-lifecycle support, and traceable sourcing for safety-critical applications.
Supply support for P6KE18A/54 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
Littelfuse is a global leader in circuit protection, specializing in fuses, TVS diodes, MOVs, and polymer PPTCs for industrial, automotive, and telecom markets.
The P6KE series was engineered for cost-effective, high-reliability transient suppression in commercial and industrial equipment - emphasizing robustness, UL certification, and compatibility with standard PCB assembly processes.
FAQ
What is the maximum clamping voltage of P6KE18A/54 under standard surge conditions?
The P6KE18A/54 clamps to a maximum of 25.2 V when subjected to its rated 23.8 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is measured at TA = 25°C and represents the upper limit of voltage imposed on the protected circuit during a 600 W transient event - critical for ensuring compatibility with 24 V logic and interface ICs downstream of P6KE18A/54.
Is P6KE18A/54 suitable for bidirectional signal line protection?
No, P6KE18A/54 is a unidirectional TVS diode and must not be used on AC or bidirectional data lines such as RS-485 or USB. For those applications, select the bidirectional variant P6KE18CA or P6KE18A/54's counterpart with 'C' or 'CA' suffix. Using P6KE18A/54 on a bidirectional line would result in forward conduction during negative half-cycles, causing malfunction or damage - the cathode band on P6KE18A/54 explicitly indicates its intended DC polarity orientation.
What does the '/54' suffix indicate in P6KE18A/54?
The '/54' suffix in P6KE18A/54 is a manufacturer-specific tape-and-reel packaging code denoting 500-piece reels with EIA-481-D compliant carrier tape. It does not affect electrical specifications, package dimensions, or thermal ratings - P6KE18A/54 performs identically to P6KE18A in all technical respects. The base part number P6KE18A defines the device's electrical behavior, while '/54' identifies the logistics format supplied by Littelfuse.
Can P6KE18A/54 replace P6KE18 in a design?
Yes, P6KE18A/54 is the tighter-tolerance version of P6KE18, with breakdown voltage specified as 17.1–18.9 V (±5%) versus P6KE18's wider 16.2–19.8 V (±10%). Both share identical package, clamping voltage (25.2 V vs. 26.5 V), and surge ratings. P6KE18A/54 provides improved consistency in VBR for designs requiring precise turn-on thresholds - no layout or schematic changes are needed when upgrading from P6KE18 to P6KE18A/54.
What is the operating temperature range for P6KE18A/54?
P6KE18A/54 is rated for junction and storage temperatures from –55°C to +175°C, enabling deployment in harsh environments such as engine compartments, industrial motor drives, and outdoor telecom cabinets. Its glass-passivated junction maintains stable VBR and low leakage across this full range, with a temperature coefficient of only 0.088 %/°C - meaning VBR shifts less than ±1.4 V over the entire span, preserving protection margins for P6KE18A/54 in thermally dynamic systems.
P6KE18A/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 23.8A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
P6KE18A/54 FAQ
1.How can I place an order for P6KE18A/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE18A/54 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 P6KE18A/54 reliable?
The price and inventory of P6KE18A/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE18A/54 is usually 5 days.
3.What payment methods are accepted for P6KE18A/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE18A/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE18A/54?
P6KE18A/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE18A/54 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 P6KE18A/54?
For technical support, including P6KE18A/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE18A/54 requirements.
6.How does Aetrix verify that P6KE18A/54 is sourced from the original manufacturer or authorized distributors?
All P6KE18A/54 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 P6KE18A/54 meets industry standards.
7.What is the process for return or replacement of P6KE18A/54?
All P6KE18A/54 units undergo pre-shipment inspection (PSI). If there is an issue with P6KE18A/54, 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 P6KE18A/54 part is unused and in its original packaging.
Return procedure for P6KE18A/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE18A/54 Tags
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