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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Vishay General Semiconductor - Diodes Division 5KP11A-E3/51

Name: 5KP11A-E3/51
Brand: Vishay General Semiconductor - Diodes Division
SKU: 5KP11A-E3/51
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 5KP11A-E3/51

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: P600, Axial

Datasheet:: 5KP11A-E3/51.pdf

Description:: TVS DIODE 11VWM 18.2VC P600

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Product details

Overview

5KP11A-E3/51 from Vishay General Semiconductor is a unidirectional TransZORB® transient voltage suppressor (TVS) diode in P600 package, designed for high-energy surge protection with 5000 W peak pulse power (10/1000 μs), 12.2–13.5 V breakdown voltage (V_BR), and 18.2 V clamping voltage (V_C) at 275 A peak pulse current. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.

For engineers reviewing the 5KP11A-E3/51 datasheet, 5KP11A-E3/51 pinout, 5KP11A-E3/51 application, or 5KP11A-E3/51 equivalent, key selection criteria include unidirectional polarity, 11.0 V stand-off voltage (V_WM), AEC-Q101 qualification, 175 °C max junction temperature, and P600 package thermal performance under repetitive surge conditions.

Technical Context

This TVS diode uses a glass-passivated P600 chip junction optimized for fast response (<1 ns) and low incremental surge resistance to clamp transients induced by inductive load switching or lightning surges. Its unidirectional configuration enables integration into DC power rails where reverse blocking is required.

It operates within -55 °C to +175 °C junction temperature range, supports 500 A non-repetitive forward surge current (I_FSM), and maintains stable clamping performance with 0.086 %/°C V_BR temperature coefficient - critical for thermal stability in engine control units and industrial motor drives.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	11.0 V - maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin for 12 V systems.
V_BR @ I_T=5.0 mA	12.2–13.5 V - measured breakdown range at 5 mA test current; ensures reliable turn-on during overvoltage events.
V_C @ I_PPM=275 A	18.2 V - clamped voltage during 5000 W surge (10/1000 μs); limits downstream device stress below 20 V threshold.
P_PPM	5000 W - peak pulse power rating; sustains high-energy transients without failure in automotive load-dump scenarios.
I_FSM	500 A - 8.3 ms single half-sine surge current rating; withstands repeated inrush and fault currents in power supply outputs.
T_J max.	+175 °C - maximum junction temperature; enables operation in under-hood automotive environments and sealed industrial enclosures.
Polarity	Unidirectional - cathode-banded configuration; blocks reverse voltage while clamping positive transients on DC lines.

Pinout & Package

Package: P600 molded epoxy case with matte tin-plated leads; UL 94 V-0 rated; RoHS-compliant (E3 suffix); 9.5 mm body length; designed for through-hole mounting with 275 °C solder dip tolerance (10 s).

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / surge return path	Connected to system ground or low-side reference; completes clamping loop during transient conduction.
Cathode	Protected line connection / surge input	Connected to protected DC rail (e.g., 12 V battery feed); color band identifies this terminal per JEDEC standard.

Key Features

Feature	Design Value
5000 W peak pulse power (10/1000 μs)	Enables robust protection against ISO 7637-2 Pulse 5a (load dump) in 12 V automotive systems without derating.
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD22 standards.
Low clamping ratio (V_C/V_BR ≈ 1.4)	Minimizes voltage overshoot during clamping - critical for safeguarding 16 V-rated logic ICs and gate drivers.
0.086 %/°C V_BR tempco	Ensures predictable breakdown shift across -40 °C to +150 °C ambient, supporting stable protection in wide-temperature ECUs.
175 °C max junction temperature	Permits direct placement near heat-generating components (e.g., MOSFETs, inductors) without thermal derating penalties.

Applications

Automotive Engine Control Unit (ECU)	Industrial DC Power Supply Output
Use Scenario: Protects microcontroller I/O and CAN transceiver power rails from load-dump transients during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V battery feed and local LDO input to clamp spikes before they reach sensitive logic. Use Value: Clamps 12 V rail to ≤18.2 V during 5000 W surges, preventing latch-up or permanent damage to 5 V/3.3 V regulators and MCU peripherals.	Use Scenario: Shields output stage of 24 V switching power supply from inductive kickback when driving solenoids or relays. IC Role / Device Role / Timing Role: Primary overvoltage clamp on regulated DC output, replacing crowbar circuits to avoid system shutdown. Use Value: Absorbs energy without shorting, allowing fuses to clear faults while maintaining system reset capability after transient clearance.
Telecom Base Station Power Interface	Consumer Appliance Motor Drive Board
Use Scenario: Safeguards 48 V backplane power inputs against lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: First-line transient suppressor on telecom rectifier output, coordinated with upstream GDT and downstream polymer PTC. Use Value: Responds in <1 ns to limit let-through voltage to <25 V, preserving integrity of PMBus controllers and hot-swap FETs.	Use Scenario: Guards BLDC motor controller gate drivers from voltage spikes generated during PWM commutation and brake regeneration. IC Role / Device Role / Timing Role: Localized TVS on 15 V gate drive rail, mounted adjacent to half-bridge driver ICs to minimize loop inductance. Use Value: Limits V_GS overshoot to safe levels (<20 V), preventing unintended turn-on or oxide damage in 20 V-rated MOSFETs.

Automotive Engine Control Unit (ECU)

Industrial DC Power Supply Output

Use Scenario: Protects microcontroller I/O and CAN transceiver power rails from load-dump transients during alternator regulation faults.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V battery feed and local LDO input to clamp spikes before they reach sensitive logic.

Use Value: Clamps 12 V rail to ≤18.2 V during 5000 W surges, preventing latch-up or permanent damage to 5 V/3.3 V regulators and MCU peripherals.

Use Scenario: Shields output stage of 24 V switching power supply from inductive kickback when driving solenoids or relays.

IC Role / Device Role / Timing Role: Primary overvoltage clamp on regulated DC output, replacing crowbar circuits to avoid system shutdown.

Use Value: Absorbs energy without shorting, allowing fuses to clear faults while maintaining system reset capability after transient clearance.

Telecom Base Station Power Interface

Consumer Appliance Motor Drive Board

Use Scenario: Safeguards 48 V backplane power inputs against lightning-induced surges entering via outdoor cabling.

IC Role / Device Role / Timing Role: First-line transient suppressor on telecom rectifier output, coordinated with upstream GDT and downstream polymer PTC.

Use Value: Responds in <1 ns to limit let-through voltage to <25 V, preserving integrity of PMBus controllers and hot-swap FETs.

Use Scenario: Guards BLDC motor controller gate drivers from voltage spikes generated during PWM commutation and brake regeneration.

IC Role / Device Role / Timing Role: Localized TVS on 15 V gate drive rail, mounted adjacent to half-bridge driver ICs to minimize loop inductance.

Use Value: Limits V_GS overshoot to safe levels (<20 V), preventing unintended turn-on or oxide damage in 20 V-rated MOSFETs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ11A-E3/52	Lower peak power (600 W), SMC package, same V_WM/V_BR range but higher V_C (18.2 V → 19.9 V at 32.7 A)	Not suitable for load-dump or high-current surge scenarios; limited to board-level ESD and low-energy transients.	Select only for space-constrained designs where surge energy is ≤100 mJ and PCB layout allows minimal trace inductance.
1.5KE11A	Same V_WM/V_BR, but lower P_PPM (1500 W), DO-201 package, no AEC-Q101 qualification	Lacks automotive qualification and thermal robustness; unsuitable for under-hood or high-reliability industrial use.	Acceptable for cost-sensitive consumer applications with infrequent, low-magnitude transients and ambient T_A < 85 °C.

Compared with SMBJ11A-E3/52 and 1.5KE11A, the 5KP11A-E3/51 delivers 3.3× and 3.3× higher surge power handling respectively, retains AEC-Q101 qualification, and supports sustained thermal dissipation in P600 - making it the only choice for automotive load-dump compliance and industrial 24 V/48 V power rail protection.

Availability

5KP11A-E3/51 is available at Aetrix Electronics and suitable for automotive engine control units, industrial DC power supply outputs, telecom base station interfaces, and consumer appliance motor drive boards requiring stable component supply across extended temperature and high-surge environments.

Supply support for 5KP11A-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, MOSFETs, and protection 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 load-dump immunity, crowbar replacement, and robust DC rail protection where 5000 W surge capability and AEC-Q101 validation are mandatory.

FAQ

What is the clamping voltage of the 5KP11A-E3/51 under full-rated surge current?

The 5KP11A-E3/51 has a maximum clamping voltage (V_C) of 18.2 V when subjected to its rated peak pulse current of 275 A (10/1000 μs waveform). This value is guaranteed per JEDEC test conditions and ensures downstream components see less than 18.2 V during worst-case transients, critical for protecting 20 V-rated gate drivers and regulators. The 5KP11A-E3/51 achieves this with low dynamic impedance and stable thermal response across its operating temperature range.

Is the 5KP11A-E3/51 suitable for automotive applications?

Yes, the 5KP11A-E3/51 is AEC-Q101 qualified and explicitly designed for automotive use, including engine control units and body electronics exposed to load-dump transients (ISO 7637-2 Pulse 5a). Its P600 package provides superior thermal mass, 175 °C junction rating, and validated reliability under temperature cycling and humidity bias - all confirmed per AEC-Q101 test requirements. The 5KP11A-E3/51 meets these standards without derating in typical under-hood environments.

What does the "E3/51" suffix indicate in 5KP11A-E3/51?

The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting J-STD-002 solderability and JESD 201 Class 1A whisker resistance. The "/51" indicates packaging in 51 mm tape-and-reel format (800 pcs/reel), per Vishay's ordering code system. This distinguishes it from /54 (13″ reel) and HE3 (AEC-Q101 qualified) variants. The 5KP11A-E3/51 is not AEC-Q101 certified - that requires the HE3 suffix.

How does the 5KP11A-E3/51 differ from the 5KP11CA variant?

The 5KP11A-E3/51 is unidirectional, while the 5KP11CA is bidirectional - meaning the latter clamps both positive and negative transients and lacks polarity marking. The 5KP11A-E3/51 has a cathode band and is intended for DC rail protection; the 5KP11CA suits AC-coupled or floating signal lines. Their V_BR, V_C, and P_PPM ratings differ slightly due to internal structure, and they are not interchangeable without circuit review. Always verify polarity and application topology before substitution.

Can the 5KP11A-E3/51 be used in parallel for higher surge current handling?

No - the 5KP11A-E3/51 is not characterized or recommended for parallel operation. Mismatched V_BR tolerances (12.2–13.5 V) and dynamic impedance variations cause current imbalance, risking thermal runaway in one device. For higher surge capacity, select a higher-rated part (e.g., 5KP12A or 5KP13A) or use a dedicated multi-chip TVS module. The 5KP11A-E3/51 datasheet specifies single-device operation only, and parallel use voids AEC-Q101 qualification compliance.

5KP11A-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):: 11V

Voltage - Breakdown (Min):: 12.2V

Voltage - Clamping (Max) @ Ipp:: 18.2V

Current - Peak Pulse (10/1000µs):: 275A

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

5KP11A-E3/51 FAQ

1.How can I place an order for 5KP11A-E3/51 through Aetrix?

Please submit a Request for Quotation (RFQ) for 5KP11A-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 5KP11A-E3/51 reliable?

The price and inventory of 5KP11A-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 5KP11A-E3/51 is usually 5 days.

3.What payment methods are accepted for 5KP11A-E3/51?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KP11A-E3/51 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 5KP11A-E3/51?

5KP11A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 5KP11A-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 5KP11A-E3/51?

For technical support, including 5KP11A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KP11A-E3/51 requirements.

6.How does Aetrix verify that 5KP11A-E3/51 is sourced from the original manufacturer or authorized distributors?

All 5KP11A-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 5KP11A-E3/51 meets industry standards.

7.What is the process for return or replacement of 5KP11A-E3/51?

All 5KP11A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 5KP11A-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 5KP11A-E3/51 part is unused and in its original packaging.

Return procedure for 5KP11A-E3/51:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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