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Vishay General Semiconductor - Diodes Division 1.5KE30CAHE3/51
- Part No.:
- 1.5KE30CAHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE30CAHE3/51.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,082
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Product details
Overview
1.5KE30CAHE3/51 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 30 V breakdown voltage (VBR = 28.5–31.5 V at 1 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 41.4 V at 36.2 A, AEC-Q101 qualification, and RoHS-compliant HE3 packaging - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5KE30CAHE3/51 datasheet, 1.5KE30CAHE3/51 pinout, 1.5KE30CAHE3/51 application, or 1.5KE30CAHE3/51 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, bi-directional clamping behavior, thermal derating curves, and direct alternative options for ESD/lightning surge protection design.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical VBR, VC, and IPPM specifications in forward and reverse directions. Its glass-passivated junction enables sub-nanosecond response time (<1 ns) and low incremental surge resistance - critical for protecting MOSFET gates and MCU I/O against fast-rising transients from inductive switching or ESD.
The device is rated for 175 °C maximum junction temperature and exhibits a temperature coefficient of +0.097 %/°C for VBR. Thermal resistance is 15.4 °C/W (junction-to-lead), supporting reliable operation under repetitive surge conditions when mounted on PCB copper pours or leads per JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 28.5 V / 31.5 V at 1 mA - defines precise clamping onset threshold for bidirectional surge events |
| VWM | 25.6 V - maximum continuous working voltage before leakage exceeds 1 µA; sets safe operating margin below VBR |
| VC @ IPPM | 41.4 V at 36.2 A - peak clamped voltage during 1500 W transient; determines protected circuit's maximum stress level |
| PPPM | 1500 W (10/1000 µs waveform) - single-pulse energy handling capacity for lightning or load-dump surges |
| IPPM | 36.2 A - peak surge current capability; directly constrains PCB trace width and fuse selection |
| TJ max. | 175 °C - enables use in under-hood automotive environments without derating penalties up to ambient 125 °C |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), molded epoxy body with matte tin-plated leads; dimensions: 5.3 mm × 5.3 mm × 9.5 mm (L × W × H), lead spacing 7.2 mm, weight 0.968 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bi-directional terminals | No polarity marking; symmetrical conduction allows placement without orientation check in AC or floating lines |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5 %) and long-term leakage stability under humidity/temperature stress |
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV line-to-line) surge immunity without external series impedance |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS sensor modules per stress test requirements |
| UL 94 V-0 molding compound | Meets flammability safety standards for enclosed industrial and transportation equipment enclosures |
| JESD 201 Class 2 whisker resistance | HE3 suffix confirms mitigation of tin whisker growth - critical for high-reliability 15+ year deployments |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and jump-start transients in 12 V/24 V vehicle systems. IC Role / Device Role: Bi-directional clamping element placed across differential signal pair or supply rail to shunt surge energy to ground. Use Value: Limits voltage excursion to ≤41.4 V during 36.2 A transients, preserving integrity of 3.3 V/5 V MCU I/O and analog front-ends. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive kickback from solenoids, contactors, and motor starters. IC Role / Device Role: Primary overvoltage clamp on 24 V DC input channels, mounted adjacent to connector entry point. Use Value: Absorbs 1500 W pulses without degradation, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity standards. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-side surge suppression on Ethernet PHY power rails and RS-485 data lines in outdoor telecom cabinets. IC Role / Device Role: Bidirectional TVS bridging VCC–GND and differential data pairs to suppress common-mode and differential-mode transients. Use Value: Sub-1 ns response ensures clamping occurs before sensitive PHY ICs experience latch-up or gate oxide rupture. |
Use Scenario: Input-stage transient protection in wall-mounted AC/DC adapters for smart home devices subjected to mains-borne surges. IC Role / Device Role: Clamp placed after bridge rectifier but before bulk capacitor to limit voltage spikes during brownouts or lightning-induced grid disturbances. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), preventing failure during repeated line-switching events. |
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), smaller SMB package (3.5 mm × 3.5 mm), VC = 53.3 V at 11.2 A | Better suited for space-constrained consumer electronics; insufficient for automotive load-dump per ISO 7637-2 Pulse 5a | Select when board area is critical and surge energy is ≤600 W; verify layout thermal relief for SMB footprint |
| 1.5KE33CA | Higher VBR (31.4–34.7 V), same 1.5KE package, VC = 45.7 V at 32.8 A | Provides larger margin above 25.6 V VWM; preferred where system nominal voltage may drift near 30 V | Choose for 3.3 V rail protection with tighter VBR/VWM ratio or when higher clamping voltage is acceptable for downstream component ratings |
Compared with 1.5KE30CAHE3/51, SMBJ33CA trades peak power and ruggedness for compactness, while 1.5KE33CA offers higher standoff and clamping voltages within identical mechanical and thermal constraints - enabling fine-tuned trade-offs between protection margin, board space, and surge severity.
Availability
1.5KE30CAHE3/51 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter designs requiring stable component supply, AEC-Q101 validation, and 1500 W surge resilience.
Supply support for 1.5KE30CAHE3/51 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, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE family was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against lightning, ESD, and inductive switching is mandatory.
FAQ
What is the breakdown voltage range of the 1.5KE30CAHE3/51?
The 1.5KE30CAHE3/51 has a guaranteed breakdown voltage (VBR) range of 28.5 V to 31.5 V at a test current of 1 mA, measured in both directions due to its bi-directional construction. This tight ±5 % tolerance ensures consistent clamping behavior across production lots and temperature ranges from –55 °C to +175 °C.
Is the 1.5KE30CAHE3/51 suitable for automotive applications?
Yes, the 1.5KE30CAHE3/51 carries AEC-Q101 qualification (per note 2 in the Vishay datasheet), confirming it meets stress test requirements for automotive use including temperature cycling, high-temperature reverse bias, and ESD. Its 175 °C max junction temperature and HE3 whisker-resistant plating further validate suitability for under-hood and chassis-mounted systems.
What does the "HE3" suffix indicate in 1.5KE30CAHE3/51?
The "HE3" suffix denotes RoHS-compliant construction with JESD 201 Class 2 whisker resistance - exceeding standard tin-lead plating requirements for long-life reliability. It also signifies AEC-Q101 qualification for the specific revision (A), distinguishing it from commercial-grade E3 variants that lack automotive validation.
How does the 1.5KE30CAHE3/51 compare to uni-directional TVS diodes like 1.5KE30AHE3/51?
The 1.5KE30CAHE3/51 is bi-directional (CA suffix), providing symmetrical clamping in both polarities with no cathode marking, making it ideal for AC lines or floating differential signals. In contrast, 1.5KE30AHE3/51 is uni-directional, featuring a cathode band and only clamps in reverse bias - requiring correct orientation and unsuitable for bipolar waveforms.
What is the clamping voltage of the 1.5KE30CAHE3/51 at its rated peak pulse current?
At its rated peak pulse current (IPPM) of 36.2 A (10/1000 µs waveform), the 1.5KE30CAHE3/51 clamps to a maximum voltage of 41.4 V. This value is measured under standardized surge conditions and represents the upper bound of voltage seen by downstream circuitry during worst-case transient events.
1.5KE30CAHE3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 36.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE30CAHE3/51 FAQ
1.How can I place an order for 1.5KE30CAHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE30CAHE3/51 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 1.5KE30CAHE3/51 reliable?
The price and inventory of 1.5KE30CAHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE30CAHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE30CAHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE30CAHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE30CAHE3/51?
1.5KE30CAHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE30CAHE3/51 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 1.5KE30CAHE3/51?
For technical support, including 1.5KE30CAHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE30CAHE3/51 requirements.
6.How does Aetrix verify that 1.5KE30CAHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE30CAHE3/51 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 1.5KE30CAHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE30CAHE3/51?
All 1.5KE30CAHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE30CAHE3/51, 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 1.5KE30CAHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE30CAHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE30CAHE3/51 Tags
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