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Vishay General Semiconductor - Diodes Division 1.5KE36HE3/73
- Part No.:
- 1.5KE36HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE36HE3/73.pdf
- Description:
- TVS DIODE 29.1VWM 52VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,979
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Product details
Overview
1.5KE36HE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails and signal lines. It features a 34.2 V minimum breakdown voltage (VBR), 30.8 V maximum stand-off voltage (VWM), 49.9 V clamping voltage (VC) at 30.1 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability - deployed in power supply input stages and sensor interface protection.
For engineers reviewing the 1.5KE36HE3/73 datasheet, 1.5KE36HE3/73 pinout, 1.5KE36HE3/73 application, or 1.5KE36HE3/73 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package mechanical data, clamping performance under standardized surge waveforms, thermal derating behavior, and direct-fit alternatives for industrial and automotive ESD/surge protection design-in.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, delivering bidirectional-capable clamping action only when configured as a CA variant - the 1.5KE36HE3/73 is unidirectional, with cathode marked by a color band. Its response time is ≤1 ns, enabling protection of fast-switching MOSFETs and ICs against lightning-induced transients per IEC 61000-4-5 (8/20 µs) and ISO 7637-2 (pulse 1/2a/3a).
It exhibits low incremental surge resistance and stable temperature coefficient of VBR (0.099 %/°C), ensuring predictable clamping across -55 °C to +175 °C operating junction range. The 1.5KE36HE3/73 uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets JESD 201 Class 2 whisker resistance due to its HE3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 34.2 V / 37.8 V at 1.0 mA test current - defines reliable avalanche initiation threshold for overvoltage detection |
| VWM | 30.8 V maximum - ensures no conduction during normal 24 V or 28 V DC system operation |
| VC @ IPPM | 49.9 V at 30.1 A - limits transient voltage seen by downstream ICs to safe levels during 10/1000 µs surges |
| PPPM | 1500 W - sustains high-energy transients without failure, critical for automotive load-dump immunity |
| Junction Temp Range | -55 °C to +175 °C - supports under-hood and industrial ambient conditions without derating loss |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - industry-standard axial-leaded through-hole package with 0.375" lead length |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
Pinout & Package
Package: JEDEC DO-201AD molded epoxy case with matte tin-plated axial leads; body diameter 0.210–0.285", length 0.375", lead diameter 0.038–0.042". Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes clamping loop during reverse-biased transient events |
| Cathode | High-side connection point | Marked with color band; connected to protected line (e.g., 24 V rail); conducts avalanche current to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics over lifetime and temperature cycling |
| 1500 W peak pulse power (10/1000 µs) | Handles automotive load dump pulses (ISO 16750-2) without degradation |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive use with zero defects in accelerated reliability testing |
| 0.099 %/°C VBR tempco | Minimizes clamping voltage drift across wide temperature ranges in engine control units |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth in high-reliability assemblies requiring long-term stability |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from ISO 16750-2 load dump transients up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges before they reach LDOs or microcontrollers. Use Value: Limits peak voltage to ≤49.9 V at 30.1 A, preventing latch-up or gate oxide damage in downstream semiconductors. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and inductive switching noise on factory floor wiring. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt fast transients (<1 ns response) before reaching ADC front-end or op-amp buffers. Use Value: Maintains signal integrity by clamping ±8 kV contact ESD (IEC 61000-4-2) with sub-50 V overshoot, avoiding measurement offset or reset. |
| Telecom Line Surge Suppression | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding PoE-powered equipment inputs against lightning-induced surges on outdoor Ethernet cables. IC Role / Device Role / Timing Role: Primary-stage TVS on DC input side of PD controller, coordinated with secondary-stage MOVs. Use Value: Absorbs 1500 W surge energy (10/1000 µs) without thermal runaway, preserving isolation barrier integrity. | Use Scenario: Overvoltage protection on AC/DC adapter secondary-side 12–24 V outputs exposed to user-insertion faults. IC Role / Device Role / Timing Role: Unidirectional clamping device placed after rectifier but before bulk capacitor to suppress output overvoltage events. Use Value: Prevents catastrophic failure of downstream USB-PD controllers or charging ICs during open-load or feedback fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | DO-214AA package (SMB), lower PPPM = 600 W, same VWM/VC profile | Suitable for space-constrained PCBs where axial leads are impractical; limited to lower-energy transients | Select SMBJ36A when board real estate is constrained and surge threat level is ≤600 W (e.g., consumer USB ports) |
| 1.5KE36CA | Bidirectional variant, identical VBR/VC/PPPM, no polarity marking | Required for AC-coupled or floating signal lines where voltage polarity reverses (e.g., RS-485, CAN bus) | Choose 1.5KE36CA only when protecting bidirectional signals; 1.5KE36HE3/73 is not interchangeable due to unidirectional polarity |
Compared with SMBJ36A, the 1.5KE36HE3/73 delivers 2.5× higher surge power handling and superior thermal dissipation via axial leads, while 1.5KE36CA enables symmetrical clamping but lacks AEC-Q101 qualification and requires different layout routing for non-polarized placement.
Availability
1.5KE36HE3/73 is available at Aetrix Electronics and suitable for automotive ECU designs, industrial PLC I/O modules, telecom power interfaces, and consumer power adapter input stages requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1.5KE36HE3/73 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against lightning, load dump, and ESD is non-negotiable.
FAQ
What is the clamping voltage of the 1.5KE36HE3/73 under a 10/1000 µs surge?
The 1.5KE36HE3/73 clamps to a maximum of 49.9 V at 30.1 A peak pulse current under the standardized 10/1000 µs waveform. This value is measured per JEDEC test conditions and reflects worst-case voltage seen by protected circuitry during surge events. The 1.5KE36HE3/73 maintains this clamping performance across its full operating temperature range (-55 °C to +175 °C) due to its low VBR temperature coefficient of 0.099 %/°C.
Is the 1.5KE36HE3/73 suitable for automotive applications?
Yes, the 1.5KE36HE3/73 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its construction - glass-passivated junction, matte tin-plated leads, and JEDEC DO-201AD package - meets stress test requirements for high-temperature bias, humidity, and thermal cycling. The 1.5KE36HE3/73 is commonly used in engine control units, body control modules, and ADAS power supplies to withstand ISO 16750-2 load dump and ISO 7637-2 transient pulses.
How does the HE3 suffix differ from the standard E3 suffix on the 1.5KE36HE3/73?
The HE3 suffix on the 1.5KE36HE3/73 indicates compliance with JESD 201 Class 2 whisker resistance testing, whereas standard E3 meets Class 1A. This distinction ensures enhanced long-term reliability in high-reliability applications where tin whisker growth could cause latent shorts. Both versions are RoHS-compliant, but only HE3 is AEC-Q101 qualified - a requirement for automotive deployment of the 1.5KE36HE3/73.
Can the 1.5KE36HE3/73 be used in bidirectional signal protection?
No, the 1.5KE36HE3/73 is a unidirectional TVS diode and must be installed with correct polarity - cathode toward the protected line. For bidirectional protection (e.g., RS-485, CAN, AC lines), the 1.5KE36CA variant is required. Using the 1.5KE36HE3/73 in reverse-biased configurations will not provide clamping and may fail catastrophically under positive transients on the anode side.
What is the maximum operating temperature for the 1.5KE36HE3/73 junction?
The 1.5KE36HE3/73 has a maximum junction temperature (TJ) rating of +175 °C, with a storage temperature range of -55 °C to +175 °C. Its thermal resistance from junction to lead (RθJL) is 15.4 °C/W, enabling effective heat transfer to PCB copper or chassis when mounted with proper lead length (0.375"). Derating begins above 25 °C ambient, following the curve in Figure 2 of the Vishay datasheet 88301 - the 1.5KE36HE3/73 retains full 1500 W pulse capability only at TJ ≤ 25 °C.
1.5KE36HE3/73 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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 29.1V
- Voltage - Breakdown (Min):
- 32.4V
- Voltage - Clamping (Max) @ Ipp:
- 52V
- Current - Peak Pulse (10/1000µs):
- 28.8A
- 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
1.5KE36HE3/73 FAQ
1.How can I place an order for 1.5KE36HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE36HE3/73 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 1.5KE36HE3/73 reliable?
The price and inventory of 1.5KE36HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE36HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE36HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE36HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE36HE3/73?
1.5KE36HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE36HE3/73 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 1.5KE36HE3/73?
For technical support, including 1.5KE36HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE36HE3/73 requirements.
6.How does Aetrix verify that 1.5KE36HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE36HE3/73 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 1.5KE36HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE36HE3/73?
All 1.5KE36HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE36HE3/73, 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 1.5KE36HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE36HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE36HE3/73 Tags
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