My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE33CA-E3/73
- Part No.:
- 1.5KE33CA-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE33CA-E3/73.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,524
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE33CA-E3/73 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 33 V breakdown voltage (VBR = 31.4–34.7 V at 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 45.7 V at 32.8 A, and operates across –55 °C to +175 °C. It is widely deployed in automotive sensor interfaces and industrial I/O protection circuits.
For engineers reviewing the 1.5KE33CA-E3/73 datasheet, 1.5KE33CA-E3/73 pinout, 1.5KE33CA-E3/73 application, or 1.5KE33CA-E3/73 equivalent, this device delivers verified bidirectional surge suppression with low clamping ratio, glass-passivated junction reliability, and RoHS-compliant matte tin leads - critical for ESD and lightning transient hardening in high-reliability embedded systems.
Technical Context
This TVS diode uses a silicon avalanche junction structure optimized for fast response (<1 ns) and low incremental surge resistance. Its bidirectional configuration enables symmetrical clamping on both polarities without external polarity management, making it suitable for AC-coupled or floating signal paths.
It complies with JEDEC standards for transient suppression and supports repetitive 10/1000 µs waveform surges at 0.01% duty cycle. Thermal performance is characterized by RθJA = 75 °C/W and RθJL = 15.4 °C/W, enabling direct PCB-mount operation without heatsinking under typical transient duty profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1.0 mA - defines precise clamping onset threshold for bidirectional transients |
| VWM | 28.2 V - maximum continuous working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 45.7 V at 32.8 A - actual clamped voltage during 1500 W surge, determining protected circuit stress level |
| PPPM | 1500 W - peak transient power handling capability per 10/1000 µs waveform, defining surge energy capacity |
| Junction Temp Range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments |
| Leakage Current | ≤1.0 µA at VWM - ensures minimal standby power loss and signal integrity in high-impedance nodes |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 rated epoxy body |
Pinout & Package
1.5KE33CA-E3/73 is housed in a DO-201AD (Case Style 1.5KE) axial-leaded package with no polarity marking - consistent with its bidirectional function. Leads are matte tin plated, solderable per J-STD-002 and JESD 22-B102, and qualified to JESD 201 Class 1A whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminals | No functional distinction - either lead connects to protected line; identical clamping behavior in both directions |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-line) without derating in standard layouts |
| Clamping ratio (VC/VBR) ≈ 1.45 | Minimizes voltage overshoot during transients, reducing stress on downstream MOSFETs and ICs |
| Response time <1 ns | Acts before most semiconductor failure mechanisms initiate, providing true pre-failure protection |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance requirements without performance trade-offs |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal/power pins to limit transient excursions below IC absolute maximum ratings. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V interface ICs during 100 V/100 ms load dump events. |
Use Scenario: Safeguarding 24 V DC digital input modules against field-wiring induced surges and relay coil flyback in factory automation cabinets. IC Role / Device Role / Timing Role: Primary surge shunt element located at terminal block entry point, upstream of optocoupler or Schmitt trigger input stage. Use Value: Maintains system uptime by absorbing >1000 surges at 1500 W without degradation, eliminating false triggers and input failures. |
| Telecom Line Interface Protection | Consumer Appliance Motor Control Board |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs from lightning-induced surges on outdoor cabling in building management systems. IC Role / Device Role / Timing Role: First-line transient suppressor on differential pair, operating symmetrically to preserve common-mode rejection. Use Value: Clamps 6 kV/3 kA surges (per IEC 61000-4-5) to <50 V, preserving data integrity and preventing transceiver latch-up. |
Use Scenario: Suppressing commutation spikes from universal motor brushes and triac-driven fans in smart home appliances. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals and triac snubber nodes to divert inductive kickback energy. Use Value: Extends triac and microcontroller lifetime by limiting dv/dt and peak voltage stress during frequent on/off cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Lower PPPM (600 W), SMC package (surface-mount), tighter VBR tolerance (5%) | Preferred for space-constrained PCBs; less suited for high-energy industrial surges | Select when board area is limited and surge threat level is ≤IEC 61000-4-5 Level 3 |
| 1.5SMC33CA | Same PPPM (1500 W), SMC package, identical VBR range, but higher leakage (5 µA at VWM) | Better for automated assembly; slightly higher standby current may affect ultra-low-power sensor nodes | Choose for reflow-compatible designs where axial leads are incompatible with production flow |
Compared with 1.5KE33CA-E3/73, SMBJ33CA offers compactness at reduced surge margin, while 1.5SMC33CA matches power rating but trades off leakage and thermal path - making 1.5KE33CA-E3/73 optimal for through-hole, high-reliability, high-energy transient suppression where lead-to-lead thermal dissipation matters.
Availability
1.5KE33CA-E3/73 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input conditioning, and telecom line interface protection requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE33CA-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 high-reliability diodes, rectifiers, and protection devices for demanding industrial and automotive applications.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, emphasizing rugged packaging, repeatable clamping, and wide temperature operation - targeting applications where failure is not an option.
FAQ
What is the breakdown voltage tolerance for 1.5KE33CA-E3/73?
The 1.5KE33CA-E3/73 has a specified breakdown voltage range of 31.4 V to 34.7 V at 1.0 mA test current, yielding a ±5.2% tolerance. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for protecting 3.3 V and 5 V logic interfaces without premature conduction.
Is 1.5KE33CA-E3/73 suitable for automotive applications?
Yes, 1.5KE33CA-E3/73 is widely used in automotive applications including sensor protection and infotainment power rails. While the E3 suffix denotes commercial-grade qualification, its –55 °C to +175 °C operating range, glass-passivated junction, and 1500 W surge capability meet core requirements for under-dash and engine bay deployments - though AEC-Q101 variants (e.g., 1.5KE33CAHE3_B) are required for formal qualification.
How does the clamping voltage of 1.5KE33CA-E3/73 compare to its breakdown voltage?
The 1.5KE33CA-E3/73 clamps at 45.7 V when subjected to its full 32.8 A peak pulse current (10/1000 µs), resulting in a clamping ratio of ~1.45 relative to its nominal 33 V breakdown. This ratio reflects low incremental surge resistance and ensures protected circuits experience minimal overvoltage - well below the 50–55 V absolute maximum ratings of most 3.3 V/5 V interface ICs.
What is the maximum reverse leakage current for 1.5KE33CA-E3/73 at rated standoff voltage?
At its maximum working voltage (VWM) of 28.2 V, the 1.5KE33CA-E3/73 exhibits ≤1.0 µA reverse leakage current at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor bias networks and minimizes standby power draw in battery-operated equipment - a key advantage over higher-leakage alternatives like 1.5SMC33CA.
Can 1.5KE33CA-E3/73 be used in parallel for higher surge current handling?
Yes, multiple 1.5KE33CA-E3/73 devices can be paralleled to increase total peak pulse current capacity, provided matched units are used and layout symmetry ensures equal current sharing. However, due to minor VBR variation (±5.2%), derating by ≥20% is recommended - e.g., two units provide ~58 A total IPPM rather than 65.6 A - to avoid current hogging and thermal runaway.
1.5KE33CA-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 32.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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:
- 1.5KE
1.5KE33CA-E3/73 FAQ
1.How can I place an order for 1.5KE33CA-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE33CA-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 1.5KE33CA-E3/73 reliable?
The price and inventory of 1.5KE33CA-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 1.5KE33CA-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE33CA-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE33CA-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE33CA-E3/73?
1.5KE33CA-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE33CA-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 1.5KE33CA-E3/73?
For technical support, including 1.5KE33CA-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE33CA-E3/73 requirements.
6.How does Aetrix verify that 1.5KE33CA-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE33CA-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 1.5KE33CA-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE33CA-E3/73?
All 1.5KE33CA-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE33CA-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 1.5KE33CA-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE33CA-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE33CA-E3/73 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
