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Vishay General Semiconductor - Diodes Division 1.5KE30AHE3/51
- Part No.:
- 1.5KE30AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE30AHE3/51.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,334
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Product details
Overview
1.5KE30AHE3/51 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 30 V breakdown voltage (VBR = 28.5–31.5 V at 1.0 mA), 41.4 V maximum clamping voltage at 36.2 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs waveform), and AEC-Q101 qualification for automotive-grade reliability - deployed in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1.5KE30AHE3/51 datasheet, 1.5KE30AHE3/51 pinout, 1.5KE30AHE3/51 application, or 1.5KE30AHE3/51 equivalent, this page delivers verified electrical parameters, JEDEC-standard 1.5KE package details, clamping performance under surge conditions, thermal derating guidance, and validated alternative parts for design continuity and sourcing flexibility.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse-biased voltage exceeds its breakdown threshold (28.5–31.5 V), it avalanches rapidly (<1 ns response) to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable VBR tolerance and low leakage (≤1.0 µA at 25.6 V stand-off).
Rated for 1500 W peak pulse power (10/1000 µs), it sustains 36.2 A IPPM with 41.4 V clamping, exhibits 0.097 %/°C VBR temperature coefficient, and supports 200 A non-repetitive forward surge (8.3 ms half-sine). Thermal resistance is 15.4 °C/W junction-to-lead, enabling effective heat dissipation through PCB copper pours or lead frames.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 28.5 V / 31.5 V at 1.0 mA - defines precise avalanche initiation window for predictable clamping onset |
| VWM | 25.6 V - maximum continuous reverse working voltage; ensures no conduction during normal operation |
| VC @ IPPM | 41.4 V at 36.2 A - clamping voltage under full 1500 W surge; determines protected circuit's maximum stress level |
| IPPM | 36.2 A - peak pulse current capability with 10/1000 µs waveform; sets minimum trace width and fuse coordination |
| PPPM | 1500 W - standardized surge energy handling capacity; validates suitability for IEC 61000-4-5 Level 4 compliance |
| TJ max | 175 °C - maximum junction temperature; enables operation in under-hood automotive environments |
| AEC-Q101 | Qualified - confirms reliability for automotive electronics per stress-test requirements (HTOL, TCT, etc.) |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; carries surge current during forward conduction events |
| Cathode | Reverse-biased clamping terminal | Marked with color band; connected to higher-potential rail; conducts avalanche current during overvoltage transients |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %), low leakage (<1 µA), and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Validates robustness against severe transients like load dump (ISO 7637-2 Pulse 5a) and EFT bursts |
| AEC-Q101 qualification | Confirms suitability for automotive powertrain, body control, and ADAS modules without additional qualification effort |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ISO 16750-2), improving protection margin |
| RoHS-compliant HE3 suffix | Indicates AEC-Q101 qualification and JESD 201 Class 2 whisker resistance - critical for high-reliability solder joints |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients (up to +120 V, 400 ms) and jump-start spikes. IC Role / Device Role / Timing Role: Uni-directional shunt TVS placed between VBAT and GND, clamping within nanoseconds to limit voltage seen by LDOs and microcontrollers. Use Value: Maintains system uptime by preventing latch-up or gate oxide damage in downstream PMICs and MCUs during harsh automotive transients. |
Use Scenario: Safeguarding 4–20 mA current-loop sensors in factory automation against induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Placed across sensor output terminals to clamp common-mode transients before they reach analog front-end op-amps or ADCs. Use Value: Preserves measurement integrity and avoids false triggers by limiting transient-induced offset shifts to <10 mV at the input stage. |
| Telecom DC Power Feeds | Consumer Device USB Port Protection |
Use Scenario: Securing -48 V telecom rectifier outputs against switching surges and accidental AC cross-connect events. IC Role / Device Role / Timing Role: Reverse-connected across DC bus to absorb negative-going transients while blocking steady-state -48 V bias. Use Value: Prevents catastrophic failure of downstream DC/DC converters and FET drivers during field-installation faults. |
Use Scenario: Adding secondary overvoltage protection on VBUS lines of USB-C host ports exposed to hot-plug and adapter mismatch events. IC Role / Device Role / Timing Role: Positioned upstream of USB PD controllers to clamp fast 100 V+ transients before they propagate into silicon. Use Value: Extends product lifetime by eliminating latent damage to USB PHYs and Type-C CC logic from repeated low-energy surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A | Lower PPPM (600 W), smaller SMB package (vs. DO-201AD), 43.5 V VC @ 13.7 A | Targeted at space-constrained consumer electronics; insufficient for automotive load dump | Select when board area is critical and surge energy is ≤600 W (e.g., USB, HDMI interfaces) |
| 1.5KE30CA | Bi-directional variant; same VBR, VC, and PPPM; unmarked leads (no polarity) | Required for AC-coupled or bidirectional signal lines (e.g., RS-485, CAN bus) where polarity reversal occurs | Choose only when protecting symmetric signals or systems with undefined voltage polarity during fault conditions |
Compared with 1.5KE30AHE3/51, SMBJ30A trades surge capacity for compactness, making it unsuitable for automotive or industrial mains-level transients; 1.5KE30CA provides identical clamping performance but lacks polarity marking, necessitating redesign for uni-directional DC rail use.
Availability
1.5KE30AHE3/51 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom DC feeds, and consumer USB port protection requiring stable component supply and AEC-Q101 assurance.
Supply support for 1.5KE30AHE3/51 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5KE series was engineered for high-energy transient suppression in demanding environments - delivering consistent clamping, AEC-Q101 validation, and robust thermal performance for automotive, industrial, and telecom infrastructure.
FAQ
What is the breakdown voltage range of the 1.5KE30AHE3/51?
The 1.5KE30AHE3/51 has a guaranteed breakdown voltage (VBR) range of 28.5 V to 31.5 V at a test current of 1.0 mA, measured per JEDEC standard. This tight ±5 % tolerance ensures predictable clamping behavior across temperature and production lots, directly supporting compliance with ISO 16750-2 overvoltage immunity requirements in automotive designs using the 1.5KE30AHE3/51.
Is the 1.5KE30AHE3/51 suitable for automotive applications?
Yes - the 1.5KE30AHE3/51 carries AEC-Q101 qualification (per note 2 in the Vishay datasheet), confirming it meets stress-test requirements for automotive electronics including HTOL, temperature cycling, and mechanical shock. Its 175 °C max junction temperature, glass-passivated junction, and HE3 suffix (JESD 201 Class 2 whisker resistance) make the 1.5KE30AHE3/51 appropriate for under-hood and body-control module deployments.
What is the maximum clamping voltage of the 1.5KE30AHE3/51 under surge conditions?
The 1.5KE30AHE3/51 clamps to a maximum of 41.4 V when subjected to its rated peak pulse current of 36.2 A (10/1000 µs waveform). This value - specified as VC in the Electrical Characteristics table - defines the upper voltage limit imposed on protected circuits during worst-case transients, enabling accurate selection of downstream ICs' absolute maximum ratings relative to the 1.5KE30AHE3/51's performance.
How does the 1.5KE30AHE3/51 differ from the 1.5KE30CA variant?
The 1.5KE30AHE3/51 is uni-directional with cathode marked by a band; the 1.5KE30CA is bi-directional with no polarity marking and identical VBR, VC, and PPPM. The 1.5KE30AHE3/51 blocks forward current above ~3.5 V, while the 1.5KE30CA clamps in both directions - making the 1.5KE30AHE3/51 ideal for DC rails and the 1.5KE30CA required for AC or bidirectional data lines like RS-485.
What package type does the 1.5KE30AHE3/51 use, and what are its key mechanical properties?
The 1.5KE30AHE3/51 uses the JEDEC DO-201AD package (Case Style 1.5KE): axial-leaded, molded epoxy body meeting UL 94 V-0 flammability rating, with matte tin-plated leads solderable per J-STD-002. Its thermal resistance is 15.4 °C/W (junction-to-lead), and it supports solder dip at 275 °C for 10 s - all confirmed in the Vishay 88301 datasheet for the 1.5KE30AHE3/51.
1.5KE30AHE3/51 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:
- 1
- Bidirectional Channels:
- -
- 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
1.5KE30AHE3/51 FAQ
1.How can I place an order for 1.5KE30AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE30AHE3/51 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 1.5KE30AHE3/51 reliable?
The price and inventory of 1.5KE30AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE30AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE30AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE30AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE30AHE3/51?
1.5KE30AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE30AHE3/51 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 1.5KE30AHE3/51?
For technical support, including 1.5KE30AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE30AHE3/51 requirements.
6.How does Aetrix verify that 1.5KE30AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE30AHE3/51 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 1.5KE30AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE30AHE3/51?
All 1.5KE30AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE30AHE3/51, 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 1.5KE30AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE30AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE30AHE3/51 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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