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Vishay General Semiconductor - Diodes Division 1.5KE30HE3/54
- Part No.:
- 1.5KE30HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE30HE3/54.pdf
- Description:
- TVS DIODE 24.3VWM 43.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,556
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Product details
Overview
1.5KE30HE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection on DC power rails and signal lines. It features a 30 V breakdown voltage (VBR = 28.5–31.5 V at 1.0 mA), 25.6 V maximum working voltage (VWM), 41.4 V clamping voltage (VC) at 36.2 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the 1.5KE30HE3/54 datasheet, 1.5KE30HE3/54 pinout, 1.5KE30HE3/54 application, or 1.5KE30HE3/54 equivalent, this AEC-Q101-qualified TVS offers verified surge immunity for 12 V/24 V systems, low clamping ratio (VC/VWM ≈ 1.62), and RoHS-compliant matte tin-plated leads suitable for J-STD-002 soldering.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, delivering sub-nanosecond response time (<1 ns) to transient overvoltages. Its unidirectional polarity enables cathode-grounded placement for positive-rail protection, and it complies with IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) immunity requirements when applied with proper PCB layout.
The 1.5KE30HE3/54 exhibits 0.097 %/°C temperature coefficient of VBR, 75 °C/W junction-to-ambient thermal resistance, and 15.4 °C/W junction-to-lead resistance - enabling reliable operation up to +175 °C junction temperature under pulsed conditions with derating above 25 °C ambient.
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 threshold for predictable clamping onset |
| VWM | 25.6 V - maximum continuous DC or RMS voltage the device blocks without leakage exceeding 1.0 µA |
| VC @ IPPM | 41.4 V at 36.2 A - clamped voltage during 10/1000 µs surge, limiting downstream component stress |
| PPPM | 1500 W - peak transient power absorption capability, supporting robust protection in automotive load-dump scenarios |
| IFSM | 200 A (8.3 ms half-sine) - surge current handling for unidirectional forward conduction during extreme transients |
| TJ max. | +175 °C - extended junction temperature rating enabling use in under-hood automotive environments |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 molded epoxy body |
Pinout & Package
1.5KE30HE3/54 uses the standard DO-201AD axial package (Case Style 1.5KE) with two terminals: anode and cathode. The cathode is marked by a color band on the body; polarity must be observed for correct unidirectional clamping orientation in circuit design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to protected line (e.g., 12 V rail); conducts only during reverse-transient clamping when cathode is held at higher potential |
| Cathode | Current exit point during clamping | Connected to ground or lower-potential reference; color-band end ensures correct PCB orientation for unidirectional suppression |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD22 standards |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal and humidity stress |
| 1500 W 10/1000 µs pulse rating | Supports protection against ISO 7637-2 Pulse 5a (load dump) in 12 V systems without derating |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving clamping precision for sensitive ICs |
| Matte tin-plated leads | Complies with J-STD-002 and JESD 22-B102 for reliable solder wetting and intermetallic formation |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECU power input subjected to ISO 7637-2 load dump pulses up to 120 V. IC Role / Device Role / Timing Role: Primary clamping element placed between input rail and ground, absorbing surge energy before it reaches DC/DC converter input stage. Use Value: Limits voltage seen by downstream regulator to ≤41.4 V, preventing overvoltage failure while maintaining system uptime during engine cranking events. |
Use Scenario: 4–20 mA current-loop sensor interface exposed to field-induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Unidirectional TVS connected across loop terminals (cathode to +V, anode to return), shunting transients before they reach analog front-end op-amps. Use Value: Clamps induced spikes within 1 ns, preserving signal integrity and avoiding ADC saturation or microcontroller reset due to transient coupling. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Inputs |
Use Scenario: -48 V DC telecom power distribution board encountering lightning-induced surges on outdoor cable runs. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), providing low-clamp, fast-response backup clamping on rectified output. Use Value: Delivers 41.4 V clamping at 36.2 A, ensuring downstream PoE controllers and PHYs remain within absolute maximum ratings during multi-kV surge events. |
Use Scenario: Brushed DC motor driver board in washing machine control module, subject to back-EMF spikes during commutation. IC Role / Device Role / Timing Role: Mounted across H-bridge high-side FET drain-source nodes to clamp inductive kickback during PWM switching transitions. Use Value: Absorbs 1500 W transient peaks without degradation, extending MOSFET lifetime and eliminating need for snubber RC networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A | DO-214AA package (SMB), 30 V VBR, 48.4 V VC @ 24.5 A, 600 W PPPM | Lower peak power and higher clamping voltage; suited for space-constrained PCBs where 1500 W is not required | Select SMBJ30A when board area is limited and surge threat level is below ISO 7637-2 Pulse 5a severity. |
| 1.5KE30A-E3/54 | Same 1.5KE package and electrical specs, but commercial-grade (non-AEC-Q101 qualified) | Lacks automotive qualification testing; acceptable for industrial/commercial power supplies without automotive lifecycle requirements | Choose 1.5KE30A-E3/54 for cost-sensitive non-automotive designs where AEC-Q101 is not mandated. |
Compared with SMBJ30A, the 1.5KE30HE3/54 delivers 2.5× higher peak power and 7.0 V lower clamping voltage - critical for protecting automotive-grade regulators. Against 1.5KE30A-E3/54, it adds AEC-Q101 validation for vibration, thermal cycling, and humidity robustness without changing footprint or electrical behavior.
Availability
1.5KE30HE3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power feed applications requiring stable component supply, long-term manufacturability, and AEC-Q101 compliance.
Supply support for 1.5KE30HE3/54 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 developed for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where failure modes demand proven surge resilience and long-term parametric stability.
FAQ
What is the clamping voltage of the 1.5KE30HE3/54 under full-rated surge current?
The 1.5KE30HE3/54 has a maximum clamping voltage (VC) of 41.4 V at 36.2 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per JEDEC test conditions and represents the upper limit of voltage imposed on protected circuitry during worst-case transient events. Designers must ensure downstream components tolerate this clamped level.
Is the 1.5KE30HE3/54 suitable for bidirectional transient protection?
No, the 1.5KE30HE3/54 is a unidirectional TVS diode, indicated by the "A" suffix and absence of "CA" in its part number. It protects only against positive transients relative to ground. For bidirectional protection (e.g., AC lines or data buses), a part such as 1.5KE30CAHE3/54 would be required - which is not offered in the HE3 variant for this voltage grade.
Does the 1.5KE30HE3/54 require a heatsink for continuous operation?
No heatsink is required for the 1.5KE30HE3/54 under normal operating conditions because it handles only transient energy, not continuous power. Its 6.5 W steady-state power dissipation (PD) applies only under infinite heatsink conditions at TL = 75 °C - relevant only for rare cases of sustained forward conduction. In typical TVS applications, thermal mass of PCB copper suffices.
How does the AEC-Q101 qualification of the 1.5KE30HE3/54 impact its use in automotive designs?
The AEC-Q101 qualification of the 1.5KE30HE3/54 confirms it meets stress-test requirements for automotive under-hood and chassis applications, including temperature cycling (-55 °C to +175 °C), mechanical shock, and humidity bias. This eliminates need for additional qualification testing by Tier 1 suppliers and supports PPAP documentation for production release.
What is the lead finish and solderability specification for the 1.5KE30HE3/54?
The 1.5KE30HE3/54 features matte tin-plated leads compliant with J-STD-002 (solderability) and JESD 22-B102 (surface mount solderability). It passes JESD 201 Class 2 whisker testing and supports wave and reflow soldering per IPC-J-STD-001. Solder dip tolerance is rated at 275 °C for up to 10 seconds.
1.5KE30HE3/54 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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24.3V
- Voltage - Breakdown (Min):
- 27V
- Voltage - Clamping (Max) @ Ipp:
- 43.5V
- Current - Peak Pulse (10/1000µs):
- 34.5A
- 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
1.5KE30HE3/54 FAQ
1.How can I place an order for 1.5KE30HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE30HE3/54 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 1.5KE30HE3/54 reliable?
The price and inventory of 1.5KE30HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE30HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE30HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE30HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE30HE3/54?
1.5KE30HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE30HE3/54 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 1.5KE30HE3/54?
For technical support, including 1.5KE30HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE30HE3/54 requirements.
6.How does Aetrix verify that 1.5KE30HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE30HE3/54 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 1.5KE30HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE30HE3/54?
All 1.5KE30HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE30HE3/54, 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 1.5KE30HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE30HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE30HE3/54 Tags
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