My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE33CAHE3_B/C
- Part No.:
- 1.5KE33CAHE3_B/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE33CAHE3_B/C.pdf
- Description:
- 1.5KW,33V 5%,BIDIR,AXIAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,800
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE33CAHE3_B/C from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 33 V breakdown voltage (VBR = 31.4–34.7 V at 1 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 junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges in automotive and industrial power supplies.
For engineers reviewing the 1.5KE33CAHE3_B/C datasheet, 1.5KE33CAHE3_B/C pinout, 1.5KE33CAHE3_B/C application, or 1.5KE33CAHE3_B/C equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJL = 15.4 °C/W), RoHS-compliant HE3 packaging, and real-world clamping behavior under standardized 10/1000 µs surge conditions.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its symmetrical clamping characteristic ensures identical protection in both polarities, with VC = 45.7 V at IPPM = 32.8 A and VWM = 28.2 V - enabling reliable standoff without leakage-induced bias shift in AC-coupled or floating signal paths.
The device is rated for 1500 W peak pulse power per JEDEC-standard 10/1000 µs waveform, derated linearly above 25 °C ambient per Fig. 2, and supports repetitive surge duty cycles up to 0.01 %. Its RθJA = 75 °C/W and RθJL = 15.4 °C/W values confirm suitability for lead-mounted PCB layouts without heatsinking in moderate-power applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - defines precise voltage threshold where clamping initiates, critical for matching system overvoltage tolerance margins |
| VWM | 28.2 V - maximum continuous reverse working voltage; ensures no conduction during normal operation in 24 V DC systems |
| VC @ IPPM | 45.7 V at 32.8 A - clamped voltage seen by protected circuit during full-rated 1500 W surge, directly limiting stress on downstream components |
| PPPM | 1500 W (10/1000 µs) - peak transient energy absorption capacity, validated per REA and ANSI/IEEE C62.35 standards |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with matte tin-plated leads, UL 94 V-0 molded epoxy body |
| AEC-Q101 | Qualified (HE3 suffix) - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
1.5KE33CAHE3_B/C uses the standard DO-201AD axial package (Case Style 1.5KE), with no polarity marking for bidirectional operation. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and qualified to JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path terminal | No functional distinction between leads; connects across protected line and ground (or differential pair) without orientation dependency |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5 %) and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse rating (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out with low-inductance grounding |
| AEC-Q101 qualification (HE3) | Validated for automotive powertrain and body electronics requiring zero-defect field performance over 15-year service life |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes let-through voltage during surge events, reducing stress on 3.3 V/5 V logic interfaces and gate drivers |
| RoHS-compliant HE3 packaging | Meets JESD 201 Class 2 whisker resistance and UL 94 V-0 flammability for safety-critical industrial control systems |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary clamping element placed between power rail and chassis ground, responding within <1 ns to suppress >100 V spikes. Use Value: Limits rail voltage to ≤45.7 V during 32.8 A surges, preventing latch-up or oxide breakdown in MCU power domains. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules from ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional shunt protector on differential or single-ended signal lines, operating symmetrically across ±28.2 V common-mode range. Use Value: Maintains signal integrity below 45.7 V clamping level while drawing <1 µA leakage at 28.2 V, avoiding DC offset errors. |
| Telecom Line Surge Protection | AC-DC Converter Input Protection |
Use Scenario: Safeguarding Ethernet PHY front-ends and PoE injectors against lightning-induced surges on outdoor cabling per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary-level TVS mounted at RJ45 connector interface, coordinated with GDT primary protection. Use Value: Clamps induced common-mode transients to 45.7 V before they reach magnetics or PHY IC, preserving IEEE 802.3 compliance. |
Use Scenario: Protecting bridge rectifier inputs and bulk capacitor terminals in industrial SMPS against AC mains transients (e.g., switching surges, lightning). IC Role / Device Role / Timing Role: Bidirectional clamp across AC input lines (L–N or L/N–PE), absorbing energy without polarity constraints. Use Value: Withstands 1500 W pulses without degradation, enabling robust design for EN 61000-4-4/5 compliance in harsh environments. |
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 | DO-214AA package (SMB), lower PPPM = 600 W, VC = 53.3 V @ 11.3 A | Compact surface-mount alternative for space-constrained designs; not AEC-Q101 qualified in standard grade | Select SMBJ33CA only if board area is limited and surge requirements are ≤600 W; verify layout inductance does not degrade clamping performance. |
| 1.5SMC33CA | DO-214AB package (SMC), PPPM = 1500 W, VC = 53.3 V @ 28.3 A, same VBR range | Surface-mount drop-in replacement with identical power rating but higher clamping voltage and no AEC-Q101 option | Choose 1.5SMC33CA for automated assembly where axial leads are incompatible; accept 7.6 V higher clamping versus 1.5KE33CAHE3_B/C. |
Compared with 1.5KE33CAHE3_B/C, SMBJ33CA offers smaller footprint but reduced surge capacity and no automotive qualification, while 1.5SMC33CA matches power rating but increases clamping voltage by 7.6 V and lacks AEC-Q101 validation - making 1.5KE33CAHE3_B/C the preferred choice for high-reliability, high-energy, automotive-grade protection.
Availability
1.5KE33CAHE3_B/C is available at Aetrix Electronics and suitable for automotive power supply protection, industrial sensor interface hardening, and telecom line surge suppression requiring stable component supply, long-lifecycle support, and AEC-Q101 traceability.
Supply support for 1.5KE33CAHE3_B/C 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5KE series is engineered for high-energy transient suppression in demanding environments, targeting automotive, industrial, and telecom applications where robustness against lightning, ESD, and inductive switching surges is mission-critical.
FAQ
What is the breakdown voltage tolerance for 1.5KE33CAHE3_B/C?
The 1.5KE33CAHE3_B/C has a guaranteed breakdown voltage range of 31.4 V to 34.7 V at 1 mA test current, representing a ±5 % tolerance around the nominal 33 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for coordinating with downstream overvoltage protection thresholds in systems like automotive ECUs and industrial PLCs. The specification is verified per JEDEC test methods in the official Vishay datasheet 88301.
Is 1.5KE33CAHE3_B/C suitable for automotive applications?
Yes, 1.5KE33CAHE3_B/C is AEC-Q101 qualified (confirmed by HE3 suffix and Vishay documentation), making it suitable for automotive powertrain, body electronics, and infotainment systems. It meets rigorous stress tests including temperature cycling, high-temperature reverse bias, and ESD, and is rated for operation from –55 °C to +175 °C. Its 1500 W surge capability supports ISO 7637-2 Pulse 5a load dump protection in 12 V/24 V vehicle networks.
How does the clamping voltage of 1.5KE33CAHE3_B/C compare to its breakdown voltage?
The 1.5KE33CAHE3_B/C clamps at 45.7 V when subjected to its full-rated 32.8 A peak pulse current (10/1000 µs), resulting in a clamping ratio (VC/VBR) of approximately 1.45. This low ratio reflects efficient energy diversion with minimal let-through voltage - essential for protecting 3.3 V or 5 V logic rails and MOSFET gates. The value is measured under standardized conditions and remains stable across temperature due to the device's low VBR temperature coefficient (0.098 %/°C).
What package type does 1.5KE33CAHE3_B/C use, and what are its mechanical features?
1.5KE33CAHE3_B/C uses the axial-leaded DO-201AD package (Case Style 1.5KE), featuring a UL 94 V-0 compliant molded epoxy body, glass-passivated silicon junction, and matte tin-plated leads qualified to JESD 201 Class 2 for whisker resistance. Lead length is specified at 0.375" (9.5 mm), and the package supports soldering at 275 °C for up to 10 seconds per JESD 22-B106. Its robust construction enables manual or wave-solder assembly in high-reliability industrial and automotive assemblies.
Can 1.5KE33CAHE3_B/C be used in bidirectional AC signal lines?
Yes, 1.5KE33CAHE3_B/C is explicitly designed for bidirectional applications, with identical electrical characteristics in both polarities - confirmed by the "CA" suffix and data sheet notes stating "electrical characteristics apply in both directions." It is commonly deployed across AC-coupled sensor lines, telecom interfaces, and AC mains inputs where polarity reversal or common-mode transients occur. Its 28.2 V stand-off voltage allows safe operation on ±24 V or 36 VPK AC signals without leakage-induced distortion.
1.5KE33CAHE3_B/C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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):
- 34A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE33CAHE3_B/C FAQ
1.How can I place an order for 1.5KE33CAHE3_B/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE33CAHE3_B/C 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 1.5KE33CAHE3_B/C reliable?
The price and inventory of 1.5KE33CAHE3_B/C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE33CAHE3_B/C is usually 5 days.
3.What payment methods are accepted for 1.5KE33CAHE3_B/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE33CAHE3_B/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE33CAHE3_B/C?
1.5KE33CAHE3_B/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE33CAHE3_B/C 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 1.5KE33CAHE3_B/C?
For technical support, including 1.5KE33CAHE3_B/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE33CAHE3_B/C requirements.
6.How does Aetrix verify that 1.5KE33CAHE3_B/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE33CAHE3_B/C 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 1.5KE33CAHE3_B/C meets industry standards.
7.What is the process for return or replacement of 1.5KE33CAHE3_B/C?
All 1.5KE33CAHE3_B/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE33CAHE3_B/C, 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 1.5KE33CAHE3_B/C part is unused and in its original packaging.
Return procedure for 1.5KE33CAHE3_B/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE33CAHE3_B/C 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
