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Vishay General Semiconductor - Diodes Division 5KP18HE3/73
- Part No.:
- 5KP18HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- P600, Axial
- Datasheet:
-
5KP18HE3/73.pdf
- Description:
- TVS DIODE 18VWM 32.2VC P600
- Quantity:
- Payment:
- Shipping:
Inventory:9,098
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Product details
Overview
5KP18HE3/73 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 5000 W peak pulse power (10/1000 µs), 18 V stand-off voltage (VWM), 20.0–22.1 V breakdown voltage (VBR at 50 mA), and clamps to ≤29.2 V at 171 A peak pulse current - used in automotive power supply output protection and industrial sensor interface circuits.
For engineers reviewing the 5KP18HE3/73 datasheet, 5KP18HE3/73 pinout, 5KP18HE3/73 application, or 5KP18HE3/73 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, P600 mechanical dimensions, clamping performance under IPPM, and direct alternatives for overvoltage protection design-in.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its VBR range (20.0–22.1 V). Its P600 glass-passivated junction enables low incremental surge resistance and sub-nanosecond response time to transients induced by inductive switching or ESD events.
Rated for 175 °C maximum junction temperature and qualified to AEC-Q101, the 5KP18HE3/73 supports automotive-grade reliability with 2.0 µA max reverse leakage at 18 V and 8.0 W steady-state power dissipation on infinite heatsink at TL = 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (min/max) | 20.0 V / 22.1 V at 50 mA - Breakdown threshold range; ensures consistent turn-on across production lots. |
| IPPM | 171 A (10/1000 µs) - Peak surge current it safely shunts without failure; determines minimum fuse/breaker coordination. |
| VC | 29.2 V - Clamped voltage at IPPM; must remain below protected IC's absolute maximum rating. |
| PPPM | 5000 W - Peak pulse power handling capability; validates suitability for lightning surge (IEC 61000-4-5 Level 4). |
| TJ max | 175 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive electronics per stress test requirements (HTOL, TC, HAST, etc.). |
Pinout & Package
Package: P600 molded epoxy case with matte tin-plated leads; RoHS-compliant, UL 94 V-0 rated; cathode indicated by color band. Dimensions: 9.5 mm × 8.6 mm × 1.32 mm (L × W × H), lead spacing 9.1 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., ground or return); conducts during positive transients in uni-directional mode. |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., +12 V rail); avalanches when voltage exceeds VBR, diverting surge to anode. |
Key Features
| Feature | Design Value |
|---|---|
| 5000 W peak pulse power (10/1000 µs) | Enables single-device protection against severe surges like ISO 7637-2 Pulse 5a without external crowbar circuitry. |
| AEC-Q101 qualification | Validates long-term reliability in automotive power modules, infotainment systems, and body control units. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream MOSFETs or regulators during clamping event. |
| 175 °C junction rating | Supports placement near heat-generating components (e.g., DC/DC converters) without thermal derating penalties. |
| Uni-directional polarity only | Simplifies layout vs. bi-directional parts; eliminates need for series blocking diode in DC applications. |
Applications
| Automotive Power Supply Output Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5a) and alternator overshoot. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 20 V. Use Value: Limits rail voltage to ≤29.2 V during 171 A transients, preventing damage to microcontrollers and CAN transceivers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: TVS connected between sensor output line and local ground to absorb ESD and inductive kickback. Use Value: Clamps fast transients (<1 ns rise time) while adding <100 pF capacitance - no signal integrity impact on 0–10 kHz sensor bandwidth. |
| Switching Power Supply Overvoltage Crowbar Replacement | Telecom DC Feeder Line Surge Suppression |
Use Scenario: Replacing SCR-based crowbar circuits in 48 V telecom rectifiers to reduce component count and improve reset behavior. IC Role / Device Role / Timing Role: TVS installed across output capacitor to trigger controlled shutdown via monitoring circuit upon overvoltage. Use Value: Withstands repeated 5000 W pulses without degradation, enabling automatic recovery after fuse replacement - unlike destructive crowbars. |
Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras) from lightning-induced surges on 48 V DC feeder lines. IC Role / Device Role / Timing Role: Primary-level TVS on input stage, coordinated with secondary-side GDTs and MOVs per IEC 61000-4-5. Use Value: 5000 W rating meets Level 4 (4 kV/2 kA) surge immunity; AEC-Q101 grade ensures field longevity in outdoor enclosures. |
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 | Lower PPPM (400 W), SMC package (smaller footprint), same VWM (18 V), higher VC (29.2 V → 32.4 V). | Not suitable for ISO 7637-2 Pulse 5a; limited to IEC 61000-4-2 ESD and minor inductive spikes. | Select when board space is constrained and surge energy is ≤400 W. |
| ON Semiconductor 1.5KE18A | Same PPPM (5000 W), DO-201 package (larger thermal mass but axial leads), VWM = 18 V, VC = 27.7 V. | Requires through-hole mounting; less suitable for automated SMT assembly than P600's gull-wing leads. | Select when legacy DO-201 compatibility or higher surge repetition tolerance is required. |
Compared with SMAJ18A and 1.5KE18A, the 5KP18HE3/73 offers AEC-Q101 qualification and P600 surface-mount compatibility - making it optimal for new automotive and industrial designs requiring high-reliability, high-power SMT TVS protection without layout redesign.
Availability
5KP18HE3/73 is available at Aetrix Electronics and suitable for automotive power module protection, industrial sensor interface hardening, and telecom DC feeder surge suppression requiring stable component supply across multi-year production cycles.
Supply support for 5KP18HE3/73 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 protection devices with emphasis on high-reliability, high-power, and automotive-qualified solutions.
The 5KP series was engineered specifically for high-energy transient suppression in automotive and industrial power systems - delivering robust clamping performance where traditional TVS arrays or MOVs lack precision or longevity.
FAQ
What is the clamping voltage of the 5KP18HE3/73 at its rated peak pulse current?
The 5KP18HE3/73 clamps to a maximum of 29.2 V when subjected to its rated 171 A peak pulse current (10/1000 µs waveform). This value is measured per JEDEC standards and guarantees that protected downstream circuitry remains within safe voltage limits during surge events. The clamping voltage is critical for ensuring compatibility with 3.3 V or 5 V logic interfaces when used with appropriate series impedance.
Is the 5KP18HE3/73 suitable for bidirectional transient protection?
No, the 5KP18HE3/73 is a unidirectional TVS diode and is not rated for bidirectional operation. Its electrical characteristics - including breakdown voltage and clamping behavior - are specified only for reverse-bias (cathode-positive) conditions. For AC or dual-polarity signal lines, a separate bi-directional part such as the 5KP18CA must be selected; using the 5KP18HE3/73 in reverse polarity risks permanent failure.
Does the 5KP18HE3/73 require a heatsink for continuous power dissipation?
The 5KP18HE3/73 has a steady-state power dissipation rating of 8.0 W only when mounted on an infinite heatsink at lead temperature (TL) = 75 °C. In typical PCB applications without dedicated heatsinking, its DC power handling is limited to ~1.5 W due to thermal resistance. It is intended for transient (not continuous) power dissipation; sustained overvoltage conditions will exceed thermal limits and cause failure.
How does the AEC-Q101 qualification of the 5KP18HE3/73 impact its use in automotive designs?
The AEC-Q101 qualification of the 5KP18HE3/73 confirms compliance with accelerated stress tests covering high-temperature operating life, temperature cycling, and humidity bias HAST - ensuring reliability in under-hood and cabin environments. This allows direct use in automotive power distribution modules, ADAS camera supplies, and infotainment systems without additional qualification testing by the end customer.
What is the meaning of the 'HE3' suffix in 5KP18HE3/73?
The 'HE3' suffix in 5KP18HE3/73 indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It distinguishes this variant from commercial-grade 'E3' versions (e.g., 5KP18AE3/73), which meet RoHS but lack automotive qualification. The '/73' denotes packaging in 13" paper tape and reel, standard for SMT placement.
5KP18HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- P600, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 32.2V
- Current - Peak Pulse (10/1000µs):
- 155A
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- P600
5KP18HE3/73 FAQ
1.How can I place an order for 5KP18HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KP18HE3/73 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 5KP18HE3/73 reliable?
The price and inventory of 5KP18HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KP18HE3/73 is usually 5 days.
3.What payment methods are accepted for 5KP18HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KP18HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KP18HE3/73?
5KP18HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KP18HE3/73 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 5KP18HE3/73?
For technical support, including 5KP18HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KP18HE3/73 requirements.
6.How does Aetrix verify that 5KP18HE3/73 is sourced from the original manufacturer or authorized distributors?
All 5KP18HE3/73 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 5KP18HE3/73 meets industry standards.
7.What is the process for return or replacement of 5KP18HE3/73?
All 5KP18HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 5KP18HE3/73, 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 5KP18HE3/73 part is unused and in its original packaging.
Return procedure for 5KP18HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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