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Vishay General Semiconductor - Diodes Division 5KP18A-E3/54
- Part No.:
- 5KP18A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- P600, Axial
- Datasheet:
-
5KP18A-E3/54.pdf
- Description:
- TVS DIODE 18VWM 29.2VC P600
- Quantity:
- Payment:
- Shipping:
Inventory:2,273
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Product details
Overview
5KP18A-E3/54 from Vishay General Semiconductor is a unidirectional TransZORB® transient voltage suppressor (TVS) diode in P600 package, designed for high-energy surge protection on DC power rails and signal lines. It features 18 V stand-off voltage (VWM), 20.0–22.1 V breakdown voltage (VBR) at 5 mA, 5000 W peak pulse power (10/1000 μs), 171 A peak pulse current (IPPM), and clamps transients to ≤29.2 V. It is AEC-Q101 qualified and used in automotive power supply output protection.
For engineers reviewing the 5KP18A-E3/54 datasheet, 5KP18A-E3/54 pinout, 5KP18A-E3/54 application, or 5KP18A-E3/54 equivalent, key selection criteria include clamping voltage vs. protected device tolerance, peak pulse current capability under system-level surge waveforms (e.g., ISO 7637-2 Pulse 5a), thermal derating above 25 °C, and RoHS-compliant lead finish compatibility with J-STD-002 solderability requirements.
Technical Context
The 5KP18A-E3/54 operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (VBR = 20.0–22.1 V). Its glass-passivated P600 junction enables low incremental surge resistance and sub-nanosecond response to transients, critical for protecting downstream MOSFETs and ICs from inductive switching spikes.
It is rated for 5000 W peak pulse power (10/1000 μs), 500 A non-repetitive forward surge current (8.3 ms half-sine), and operates across –55 °C to +175 °C junction temperature. Thermal performance requires adequate PCB copper area or heatsinking due to 8.0 W steady-state power dissipation limit at TL = 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 18.0 V - Maximum continuous reverse voltage before significant leakage; sets minimum operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 20.0–22.1 V at 5 mA - Confirmed avalanche onset range; ensures reliable triggering before protected circuit damage. |
| VC (Clamping Voltage) | ≤29.2 V at IPPM = 171 A - Maximum voltage seen by downstream components during worst-case 10/1000 μs surge. |
| PPPM (Peak Pulse Power) | 5000 W - Sustains 10/1000 μs surges per JEDEC standards; validates robustness against lightning-induced transients. |
| IFSM (Surge Current) | 500 A (8.3 ms half-sine) - Withstands repetitive inrush or fault currents without degradation. |
| TJ max. | +175 °C - Enables operation in under-hood automotive environments and high-temperature industrial enclosures. |
| Polarity | Unidirectional - Cathode marked by color band; blocks forward conduction, clamps only reverse overvoltage events. |
Pinout & Package
Package: P600 molded epoxy case with glass-passivated chip junction; UL 94 V-0 rated; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102; E3 suffix indicates JESD 201 Class 1A whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to ground or low-impedance return plane; must handle full IPPM during clamping. |
| Cathode | Reverse voltage sensing / Clamping node | Connected to protected line (e.g., 12 V rail); color band identifies this terminal; defines VWM and VBR reference. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics applications requiring reliability under thermal cycling, humidity, and vibration stress. |
| 5000 W peak pulse rating (10/1000 μs) | Meets ISO 7637-2 Pulse 5a severity level for 12 V systems; eliminates need for crowbar circuits in SMPS outputs. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream MOSFETs and controllers; improves system-level surge immunity margin. |
| 175 °C maximum junction temperature | Supports placement near heat-generating components (e.g., DC-DC inductors) without thermal derating penalties. |
| P600 mechanical robustness | Withstands 275 °C solder dip (10 s) per JESD 22-B106; compatible with standard reflow and wave soldering processes. |
Applications
| Automotive Power Supply Protection | Industrial DC Rail Surge Suppression |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 16750-2) and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input of PMIC or LDO regulator. Use Value: Clamps transients to ≤29.2 V within nanoseconds, preventing latch-up or gate oxide damage in protected ICs. |
Use Scenario: Safeguarding programmable logic controller (PLC) 24 V DC inputs against field-wiring induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on I/O module power bus, upstream of filtering and regulation stages. Use Value: Absorbs 5000 W pulses without failure, enabling compliance with IEC 61000-4-5 Level 4 (4 kV) testing. |
| Switching Power Supply Output Clamping | Sensor Signal Line Protection |
Use Scenario: Replacing crowbar SCR circuits on flyback converter outputs to reduce component count and improve reset behavior. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across secondary-side rectifier output. Use Value: Limits output overvoltage during short-circuit recovery, allowing fuse/breaker coordination without permanent shutdown. |
Use Scenario: Shielding analog sensor interfaces (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential signal pair (e.g., CAN, LIN, or analog sensor lines). Use Value: Sub-ns response prevents ESD-induced latch-up in front-end op-amps or ADC drivers while maintaining signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ18A | Same 18 V VWM, but lower PPPM (400 W), smaller SMA package (lower thermal mass), higher VC (32.4 V at 12.9 A). | Targeted at board-level ESD/surge where energy is lower; unsuitable for ISO 7637-2 Pulse 5a or load dump. | Select 5KP18A-E3/54 when system-level surge energy exceeds 400 W or thermal management requires P600's copper-mount capability. |
| ON Semiconductor 1.5KE18A | Same 18 V VWM and P600 package, but lower PPPM (1500 W), lower IPPM (83.3 A), and higher VC (29.7 V at 50.5 A). | Valid for basic IEC 61000-4-5 Level 2 (1 kV) but not Level 4; lacks AEC-Q101 qualification. | Choose 5KP18A-E3/54 for automotive-grade reliability, AEC-Q101 compliance, and 5000 W surge handling in harsh environments. |
Compared with SMAJ18A and 1.5KE18A, the 5KP18A-E3/54 delivers 3.3× and 3.3× higher peak pulse power respectively, maintains tighter clamping (29.2 V vs. 32.4 V/29.7 V), and is the only AEC-Q101-qualified option-making it essential for automotive load-dump and industrial 4-kV surge protection.
Availability
5KP18A-E3/54 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and switching power supply output protection requiring stable component supply and long-term lifecycle continuity.
Supply support for 5KP18A-E3/54 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and TVS devices with emphasis on reliability, power handling, and automotive qualification.
The 5KP series was engineered specifically for high-energy transient suppression in automotive and industrial power systems, targeting replacement of crowbar circuits and compliance with ISO 7637-2 and IEC 61000-4-5 standards.
FAQ
What is the clamping voltage of the 5KP18A-E3/54 under maximum surge conditions?
The 5KP18A-E3/54 clamps to a maximum of 29.2 V when subjected to its rated peak pulse current of 171 A (10/1000 μs waveform). This value is measured per JEDEC test conditions and represents the upper limit of voltage imposed on protected circuitry during worst-case transient events. The 5KP18A-E3/54 achieves this with low incremental surge resistance, ensuring minimal overshoot beyond the specified VC.
Is the 5KP18A-E3/54 suitable for automotive applications?
Yes, the 5KP18A-E3/54 is AEC-Q101 qualified and explicitly designed for automotive use cases including load dump protection (ISO 16750-2) and alternator transient suppression. Its 175 °C maximum junction temperature, robust P600 package, and verified performance under thermal cycling make it appropriate for engine control modules, body control units, and infotainment power supplies. The 5KP18A-E3/54 meets automotive reliability and qualification requirements out-of-the-box.
How does the 5KP18A-E3/54 differ from the 5KP18CA variant?
The 5KP18A-E3/54 is unidirectional, while the 5KP18CA is bidirectional-meaning the latter clamps both positive and negative transients and has symmetric VBR. The 5KP18A-E3/54 is intended for DC rail protection where polarity is fixed (e.g., 12 V battery line), offering tighter VBR tolerance and optimized clamping for single-polarity threats. The 5KP18A-E3/54 cannot substitute for 5KP18CA in AC or floating signal line applications.
What is the recommended PCB layout for thermal management of the 5KP18A-E3/54?
For optimal thermal performance, the 5KP18A-E3/54 requires ≥250 mm² of 2-oz copper connected to each lead (anode and cathode), with thermal vias to inner or backside planes. Derating begins above 25 °C ambient, and the 5KP18A-E3/54 reaches its 8.0 W steady-state limit at TL = 75 °C. Mounting directly to a metal chassis or heatsink further extends safe operating area-critical for repeated surge events in industrial motor drives or automotive DC-DC converters.
Does the 5KP18A-E3/54 meet RoHS and lead-free assembly requirements?
Yes, the "E3" suffix in 5KP18A-E3/54 denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads that satisfy J-STD-002 solderability and JESD 201 Class 1A whisker resistance. It supports lead-free reflow profiles up to 260 °C peak and is compatible with standard wave and selective soldering processes. The 5KP18A-E3/54 is fully compliant with EU RoHS Directive 2011/65/EU and related regional environmental regulations.
5KP18A-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- P600, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 171A
- Power - Peak Pulse:
- 5000W (5kW)
- 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:
- P600
5KP18A-E3/54 FAQ
1.How can I place an order for 5KP18A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KP18A-E3/54 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 5KP18A-E3/54 reliable?
The price and inventory of 5KP18A-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KP18A-E3/54 is usually 5 days.
3.What payment methods are accepted for 5KP18A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KP18A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KP18A-E3/54?
5KP18A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KP18A-E3/54 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 5KP18A-E3/54?
For technical support, including 5KP18A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KP18A-E3/54 requirements.
6.How does Aetrix verify that 5KP18A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 5KP18A-E3/54 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 5KP18A-E3/54 meets industry standards.
7.What is the process for return or replacement of 5KP18A-E3/54?
All 5KP18A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 5KP18A-E3/54, 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 5KP18A-E3/54 part is unused and in its original packaging.
Return procedure for 5KP18A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KP18A-E3/54 Tags
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