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Vishay General Semiconductor - Diodes Division 5KP26A-E3/51
- Part No.:
- 5KP26A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- P600, Axial
- Datasheet:
-
5KP26A-E3/51.pdf
- Description:
- TVS DIODE 26VWM 42.1VC P600
- Quantity:
- Payment:
- Shipping:
Inventory:2,083
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Product details
Overview
5KP26A-E3/51 from Vishay General Semiconductor is a unidirectional TransZORB® transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal paths. It features a 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 5.0 mA, 42.1 V maximum clamping voltage at 119 A peak pulse current, and 5000 W peak pulse power capability with 10/1000 μs waveform - deployed to safeguard MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the 5KP26A-E3/51 datasheet, 5KP26A-E3/51 pinout, 5KP26A-E3/51 application, or 5KP26A-E3/51 equivalent, this page delivers verified electrical specs, P600 package details, clamping performance under surge stress, AEC-Q101 qualification status, and direct alternatives for overvoltage protection design-in.
Technical Context
This TVS diode operates as a unidirectional shunt protector: it remains high-impedance below 26 V (VWM), triggers avalanche conduction at ≥28.9 V (VBR), and clamps transients to ≤42.1 V (VC) while passing up to 119 A (IPPM) in a 10/1000 μs pulse. Its P600 glass-passivated junction enables low incremental surge resistance and sub-nanosecond response time.
Rated for -55 °C to +175 °C junction temperature, it supports robust operation in under-hood automotive environments and industrial motor drives. The device is RoHS-compliant (E3 suffix), meets JESD 201 Class 1A whisker test, and is qualified to AEC-Q101 - confirming suitability for automotive-grade reliability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26.0 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC bias margin. |
| VBR (min/max) | 28.9 V / 31.9 V at 5.0 mA - Avalanche breakdown range; ensures reliable turn-on within tight tolerance for predictable clamping onset. |
| VC @ IPPM | 42.1 V at 119 A - Clamped voltage during 10/1000 μs surge; determines protected circuit's maximum transient exposure level. |
| PPPM | 5000 W - Peak pulse power handling; enables survival of high-energy lightning-induced or inductive-switching surges. |
| IFSM | 600 A - Non-repetitive forward surge current rating; supports crowbar-style fault clearing without bond-wire failure. |
| TJ max. | +175 °C - Maximum junction temperature; allows operation in high-ambient environments like engine control units. |
| Polarity | Unidirectional - Cathode-banded configuration; protects against positive-going transients only; requires correct orientation in series with load. |
Pinout & Package
Package: P600 molded epoxy case with matte tin-plated leads; UL 94 V-0 rated; 9.5 mm body length; lead spacing 9.1 mm; RoHS-compliant (E3 suffix); cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to system ground or low-side return path; enables clamping of positive transients to reference plane. |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., 24 V rail); color band identifies this terminal for correct PCB placement. |
Key Features
| Feature | Design Value |
|---|---|
| 5000 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V systems without degradation. |
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS power rails. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream silicon; critical for protecting 30 V-rated MOSFETs and gate drivers. |
| P600 glass-passivated junction | Ensures stable VBR over lifetime and temperature; eliminates risk of passivation layer delamination under thermal cycling. |
| 10/1000 μs waveform compliance | Matches industry-standard surge test profile for industrial and telecom equipment immunity validation. |
Applications
| Automotive Power Rail Protection | Industrial DC Motor Drive Input |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load-dump transients (ISO 7637-2 Pulse 5a, up to 120 V/100 ms). IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed across input terminals to clamp voltage before reaching LDOs and microcontrollers. Use Value: Limits peak rail voltage to 42.1 V during 119 A surge, preventing latch-up or oxide breakdown in 30 V-rated power management ICs. |
Use Scenario: Safeguarding rectified DC bus of 3-phase inverters against inductive kickback from contactor switching or motor stall events. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing energy from stored magnetic field collapse in motor windings. Use Value: Dissipates 5000 W peak pulse without failure, enabling fuse coordination and avoiding catastrophic short-circuit faults. |
| Telecom Power Supply Output | Consumer Appliance Control Board |
Use Scenario: Secondary-side overvoltage suppression on 48 V PoE-powered switch fabric modules exposed to Ethernet cable ESD and surge coupling. IC Role / Device Role / Timing Role: Final-stage clamping device after DC/DC converter, guarding PHY ICs and Ethernet magnetics. Use Value: Clamps fast-rising transients (<1 ns response) to ≤42.1 V, preserving integrity of 50 V-rated Ethernet controller I/O pins. |
Use Scenario: Input protection for microcontroller-based washing machine mainboard subjected to relay coil back-EMF and mains-borne noise. IC Role / Device Role / Timing Role: Unidirectional TVS on 12 V logic supply rail upstream of voltage regulators and optocouplers. Use Value: Withstands repetitive 600 A half-sine surges per IEC 61000-4-4, ensuring long-term reliability without parameter drift. |
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 SMAJ26A | Same VWM (26 V), lower PPPM (400 W), DO-214AC package (smaller footprint, lower thermal mass) | Suitable for low-energy consumer electronics; insufficient for ISO 7637-2 load dump or industrial motor drive surges | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4 Level 2. |
| ON Semiconductor 1.5KE27A | Similar VWM (27 V), same P600 package, but lower PPPM (1500 W) and higher VC (45.7 V at 33 A) | Acceptable for basic industrial controls but fails to meet 5000 W requirement for automotive or heavy-duty motor applications | Choose only if cost sensitivity outweighs need for full 5 kW surge margin and tighter clamping. |
Compared with SMAJ26A and 1.5KE27A, the 5KP26A-E3/51 delivers 3.3× higher peak power handling and 3.6× lower clamping voltage per watt than 1.5KE27A, making it the sole option among the three qualified for AEC-Q101 and capable of surviving automotive load-dump events without derating.
Availability
5KP26A-E3/51 is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive protection, telecom power supply hardening, and appliance control board surge resilience requiring stable component supply across multi-year production cycles.
Supply support for 5KP26A-E3/51 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, TVS devices, and power MOSFETs with emphasis on reliability, ruggedness, and automotive-grade qualification.
The 5KP series was engineered specifically for high-power transient suppression in harsh environments - targeting automotive load-dump protection, industrial motor drive inputs, and telecom power rail hardening where 5 kW surge capability and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of the 5KP26A-E3/51 under maximum surge conditions?
The 5KP26A-E3/51 exhibits a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 119 A using the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring compatibility with 30 V-rated downstream components. The 5KP26A-E3/51 maintains this clamping performance across its full operating temperature range.
Is the 5KP26A-E3/51 suitable for automotive applications?
Yes, the 5KP26A-E3/51 is AEC-Q101 qualified and explicitly designed for automotive use cases including engine control units, body control modules, and ADAS power supplies. Its -55 °C to +175 °C operating junction temperature range, robust P600 package, and ability to withstand ISO 7637-2 Pulse 5a load-dump transients confirm its suitability. The E3 suffix also certifies RoHS compliance and JESD 201 Class 1A whisker resistance - both required for modern automotive manufacturing.
How does the 5KP26A-E3/51 differ from bidirectional TVS diodes?
The 5KP26A-E3/51 is unidirectional, meaning it conducts only during positive voltage excursions relative to its cathode - ideal for DC power line protection where polarity is fixed. Bidirectional variants (e.g., 5KP26CA) protect against both polarities but exhibit higher leakage and reduced VWM margin. For 24 V automotive or industrial DC systems, the unidirectional 5KP26A-E3/51 provides tighter clamping, lower capacitance, and better DC blocking - making it the preferred choice unless AC or reversible signal lines require symmetrical protection.
What is the thermal derating behavior of the 5KP26A-E3/51 above 25 °C ambient?
The 5KP26A-E3/51 follows a linear derating curve from 100 % power at 25 °C to 0 % at 175 °C junction temperature. At 75 °C lead temperature (TL), its steady-state power dissipation drops to 8.0 W - consistent with its PD rating. Engineers must calculate junction temperature rise using RθJA (provided in Fig. 5 of the datasheet) and ensure heatsinking or layout allowances prevent TJ from exceeding 175 °C during sustained surge recovery or repeated transient events.
Can the 5KP26A-E3/51 replace older 1.5KE-series TVS diodes in existing designs?
The 5KP26A-E3/51 is not a drop-in replacement for 1.5KE26A due to differences in peak pulse power (5000 W vs. 1500 W), clamping voltage (42.1 V vs. 45.7 V), and surge current rating (119 A vs. 33 A). While both use P600 packaging and share similar VWM, upgrading to 5KP26A-E3/51 requires verification of PCB thermal relief, fuse coordination, and system-level surge test compliance - especially in automotive or industrial applications where the higher energy rating introduces new thermal and coordination considerations. The 5KP26A-E3/51 should be treated as a performance upgrade, not a direct substitute.
5KP26A-E3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- P600, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 119A
- 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
5KP26A-E3/51 FAQ
1.How can I place an order for 5KP26A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KP26A-E3/51 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 5KP26A-E3/51 reliable?
The price and inventory of 5KP26A-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KP26A-E3/51 is usually 5 days.
3.What payment methods are accepted for 5KP26A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KP26A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KP26A-E3/51?
5KP26A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KP26A-E3/51 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 5KP26A-E3/51?
For technical support, including 5KP26A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KP26A-E3/51 requirements.
6.How does Aetrix verify that 5KP26A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 5KP26A-E3/51 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 5KP26A-E3/51 meets industry standards.
7.What is the process for return or replacement of 5KP26A-E3/51?
All 5KP26A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 5KP26A-E3/51, 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 5KP26A-E3/51 part is unused and in its original packaging.
Return procedure for 5KP26A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KP26A-E3/51 Tags
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