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

Vishay General Semiconductor - Diodes Division 5KP33A-E3/73

Name: 5KP33A-E3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: 5KP33A-E3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 5KP33A-E3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: P600, Axial

Datasheet:: 5KP33A-E3/73.pdf

Description:: TVS DIODE 33VWM 53.3VC P600

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Product details

Overview

5KP33A-E3/73 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 a 33 V stand-off voltage (V_WM), 36.7–40.6 V breakdown voltage (V_BR at 5.0 mA), 53.3 V clamping voltage (V_C) at 93.8 A peak pulse current, and 5000 W peak pulse power (10/1000 μs). It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor interfaces in automotive power supplies.

For engineers reviewing the 5KP33A-E3/73 datasheet, 5KP33A-E3/73 pinout, 5KP33A-E3/73 application, or 5KP33A-E3/73 equivalent, key selection criteria include clamping voltage margin relative to protected device's absolute maximum rating, unidirectional polarity compatibility with DC-biased lines, thermal derating above 25 °C, and P600 PCB footprint and soldering requirements per JESD 22-B106.

Technical Context

This TVS diode operates as a voltage-clamped crowbar element-triggering into low-impedance conduction when reverse voltage exceeds V_BR, limiting transient energy to downstream circuitry. Its glass-passivated P600 junction enables fast response (<1 ns), low incremental surge resistance, and stable clamping under repetitive 0.01% duty cycle surges.

Designed for DC power rail protection, it replaces discrete crowbar circuits by absorbing up to 5000 W of transient energy without latch-up. The 33 V V_WM supports nominal 24 V systems with 20 % tolerance margin, while its 175 °C max junction temperature and AEC-Q101 qualification confirm suitability for under-hood automotive environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	33 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system overvoltage threshold for protection activation.
V_BR (min/max)	36.7 V / 40.6 V at 5.0 mA - Confirmed breakdown range ensures reliable triggering across process variation and temperature.
V_C @ I_PPM	53.3 V at 93.8 A - Clamping voltage defines worst-case stress on protected ICs during 10/1000 μs transients.
P_PPM	5000 W - Peak pulse power rating determines survivability against ISO 7637-2 Pulse 5a/b or IEC 61000-4-5 Level 4 surges.
I_FSM	600 A - 8.3 ms half-sine surge current rating validates robustness against inrush or short-circuit fault currents.
T_J max	175 °C - Enables operation in high-temperature automotive engine compartments without thermal shutdown.
Polarity	Unidirectional - Requires correct orientation on DC lines; cathode marked by band, anode connected to ground or lower potential.

Pinout & Package

Package: P600 molded epoxy case with matte tin-plated leads; UL 94 V-0 rated; RoHS-compliant (E3 suffix); 0.375" (9.5 mm) body length; lead spacing matches standard through-hole mounting.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Low-side connection point	Connected to ground or return path; conducts during reverse transient to shunt current away from load.
Cathode	High-side connection point	Marked by color band; connects to protected line (e.g., 24 V rail); reverse-biased during normal operation.

Key Features

Feature	Design Value
5000 W peak pulse power (10/1000 μs)	Enables single-device protection against severe automotive load dump and inductive switching events without cascaded stages.
AEC-Q101 qualified	Validates reliability for automotive powertrain and chassis applications including engine control units and ADAS sensor modules.
Low clamping ratio (V_C/V_BR ≈ 1.35)	Minimizes voltage overshoot during clamping, reducing risk of damage to 33 V-rated components downstream.
P600 glass-passivated junction	Delivers stable leakage (<2 μA at V_WM) and repeatable V_BR over lifetime, critical for long-term field reliability.
Solder dip rated 275 °C for 10 s	Supports wave soldering and rework without junction degradation or bond wire failure.

Applications

Automotive Power Supply Protection	Industrial PLC I/O Protection
Use Scenario: Protecting 24 V CAN bus power rails and microcontroller supply inputs from load dump transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between 24 V rail and chassis ground to clamp transients above 33 V. Use Value: Limits peak voltage to ≤53.3 V during 100 A surges, preventing latch-up or gate oxide rupture in protected MCU and transceiver ICs.	Use Scenario: Safeguarding analog input channels of programmable logic controllers against ESD and field-wiring induced surges. IC Role / Device Role / Timing Role: Front-end transient suppressor on 24 V sensor excitation lines feeding 16-bit ADCs and isolation amplifiers. Use Value: Clamps fast-rising transients within <1 ns, preserving signal integrity and avoiding ADC saturation or digital error flags.
DC Motor Drive Gate Protection	Telecom Power Shelf Surge Suppression
Use Scenario: Shielding high-side N-channel MOSFET gate drivers from inductive kickback during H-bridge commutation. IC Role / Device Role / Timing Role: TVS placed between gate driver output and MOSFET gate to clamp negative-going spikes below -0.7 V and positive spikes above 33 V. Use Value: Prevents gate oxide breakdown and unintended turn-on due to dv/dt coupling, extending MOSFET lifetime in 48 V motor drives.	Use Scenario: Secondary-side surge suppression on +48 V telecom rectifier outputs feeding base station RF modules. IC Role / Device Role / Timing Role: Standoff-rated TVS on 48 V distribution bus to absorb residual surges after primary MOV-based protection. Use Value: Provides precise 53.3 V clamping to protect sensitive RF front-end ICs with 50 V absolute maximum ratings, meeting GR-1089-CORE Level 4.

Automotive Power Supply Protection

Industrial PLC I/O Protection

Use Scenario: Protecting 24 V CAN bus power rails and microcontroller supply inputs from load dump transients per ISO 7637-2.

IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between 24 V rail and chassis ground to clamp transients above 33 V.

Use Value: Limits peak voltage to ≤53.3 V during 100 A surges, preventing latch-up or gate oxide rupture in protected MCU and transceiver ICs.

Use Scenario: Safeguarding analog input channels of programmable logic controllers against ESD and field-wiring induced surges.

IC Role / Device Role / Timing Role: Front-end transient suppressor on 24 V sensor excitation lines feeding 16-bit ADCs and isolation amplifiers.

Use Value: Clamps fast-rising transients within <1 ns, preserving signal integrity and avoiding ADC saturation or digital error flags.

DC Motor Drive Gate Protection

Telecom Power Shelf Surge Suppression

Use Scenario: Shielding high-side N-channel MOSFET gate drivers from inductive kickback during H-bridge commutation.

IC Role / Device Role / Timing Role: TVS placed between gate driver output and MOSFET gate to clamp negative-going spikes below -0.7 V and positive spikes above 33 V.

Use Value: Prevents gate oxide breakdown and unintended turn-on due to dv/dt coupling, extending MOSFET lifetime in 48 V motor drives.

Use Scenario: Secondary-side surge suppression on +48 V telecom rectifier outputs feeding base station RF modules.

IC Role / Device Role / Timing Role: Standoff-rated TVS on 48 V distribution bus to absorb residual surges after primary MOV-based protection.

Use Value: Provides precise 53.3 V clamping to protect sensitive RF front-end ICs with 50 V absolute maximum ratings, meeting GR-1089-CORE Level 4.

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 SMAJ33A	400 W P_PPM, SMA package, 53.3 V V_C at 7.5 A - lower power handling, surface-mount only.	Targeted at low-energy board-level ESD; unsuitable for load dump or high-current inductive transients.	Select when space-constrained PCB layout requires SMT and surge energy is limited to IEC 61000-4-2/4-5 Level 2.
ON Semiconductor 1.5KE33A	1500 W P_PPM, DO-201 package, 53.3 V V_C at 28.2 A - lower peak power, axial-leaded, higher thermal resistance.	Used in cost-sensitive consumer power adapters; lacks AEC-Q101 qualification and automotive thermal margin.	Choose for non-automotive industrial applications where 5000 W capability is not required and lead-forming flexibility is needed.

Compared with SMAJ33A and 1.5KE33A, the 5KP33A-E3/73 delivers 3.3× and 3.3× higher peak pulse power respectively, maintains AEC-Q101 compliance for automotive use, and offers superior thermal dissipation via the P600 package-making it the only option validated for sustained 24 V load dump protection.

Availability

5KP33A-E3/73 is available at Aetrix Electronics and suitable for automotive power supply protection, industrial PLC I/O conditioning, DC motor drive gate protection, and telecom power shelf surge suppression requiring stable component supply across extended production lifecycles.

Supply support for 5KP33A-E3/73 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 reliability, power efficiency, and automotive-grade qualification.

The 5KP series was engineered specifically for high-energy transient suppression in automotive and industrial DC power systems-delivering 5 kW pulse capability in rugged P600 packaging to replace legacy crowbar circuits and simplify system-level surge protection design.

FAQ

What is the clamping voltage of the 5KP33A-E3/73 under a 10/1000 μs surge?

The 5KP33A-E3/73 has a maximum clamping voltage (V_C) of 53.3 V when subjected to its rated peak pulse current of 93.8 A using a 10/1000 μs waveform. This value is measured per JEDEC standards and represents the worst-case voltage seen by downstream components during transient suppression. The 5KP33A-E3/73 achieves this clamping performance while maintaining unidirectional polarity and P600 package thermal robustness.

Is the 5KP33A-E3/73 suitable for automotive applications?

Yes, the 5KP33A-E3/73 is AEC-Q101 qualified and explicitly designed for automotive environments, including under-hood power supply protection. Its 175 °C maximum junction temperature, glass-passivated P600 junction, and 5000 W peak pulse rating meet ISO 7637-2 load dump requirements. The 5KP33A-E3/73 is commonly deployed in engine control units, body control modules, and ADAS sensor power rails.

How does the 5KP33A-E3/73 differ from the 1.5KE33A in practical design use?

The 5KP33A-E3/73 provides 5000 W peak pulse power versus 1500 W for the 1.5KE33A, enabling protection against severe automotive load dump events that the 1.5KE33A cannot survive. The 5KP33A-E3/73 uses a P600 package with lower thermal resistance and is AEC-Q101 qualified, whereas the 1.5KE33A uses a DO-201 package and lacks automotive qualification. In practice, the 5KP33A-E3/73 replaces crowbar circuits; the 1.5KE33A serves general-purpose board-level protection.

What is the meaning of the "E3/73" suffix in 5KP33A-E3/73?

The "E3" suffix indicates RoHS-compliant, commercial-grade construction with JESD 201 Class 1A whisker resistance; "73" denotes the preferred packaging code-73 = 800-piece tape-and-reel on 13-inch diameter reel. This differs from "HE3", which denotes AEC-Q101 qualification. The 5KP33A-E3/73 is RoHS-compliant and suitable for commercial and industrial applications where AEC-Q101 is not mandated.

Can the 5KP33A-E3/73 be used in bidirectional configurations?

No, the 5KP33A-E3/73 is unidirectional only, as confirmed in the Vishay datasheet. It conducts only when reverse-biased beyond V_BR; forward conduction follows standard diode behavior (V_F = 3.5 V at 100 A). For AC or bipolar transient protection, a separate bidirectional TVS (e.g., 5KP33CA) or back-to-back unidirectional configuration is required. Using the 5KP33A-E3/73 in bidirectional roles risks failure during positive transients.

5KP33A-E3/73 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Package/Case:: P600, Axial

Series:: TransZorb®

Packaging:: Cut Tape (CT)

Product Status:: Active

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 33V

Voltage - Breakdown (Min):: 36.7V

Voltage - Clamping (Max) @ Ipp:: 53.3V

Current - Peak Pulse (10/1000µs):: 93.8A

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

5KP33A-E3/73 FAQ

1.How can I place an order for 5KP33A-E3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for 5KP33A-E3/73 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 5KP33A-E3/73 reliable?

The price and inventory of 5KP33A-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KP33A-E3/73 is usually 5 days.

3.What payment methods are accepted for 5KP33A-E3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KP33A-E3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 5KP33A-E3/73?

5KP33A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 5KP33A-E3/73 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 5KP33A-E3/73?

For technical support, including 5KP33A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KP33A-E3/73 requirements.

6.How does Aetrix verify that 5KP33A-E3/73 is sourced from the original manufacturer or authorized distributors?

All 5KP33A-E3/73 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 5KP33A-E3/73 meets industry standards.

7.What is the process for return or replacement of 5KP33A-E3/73?

All 5KP33A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 5KP33A-E3/73, 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 5KP33A-E3/73 part is unused and in its original packaging.

Return procedure for 5KP33A-E3/73:

1.Submit a request within 90 days.

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

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