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Vishay General Semiconductor - Diodes Division 1.5KE43HE3/73
- Part No.:
- 1.5KE43HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43HE3/73.pdf
- Description:
- TVS DIODE 34.8VWM 61.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,776
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Product details
Overview
1.5KE43HE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power rails and signal lines. It features a 43 V breakdown voltage (VBR = 40.9–45.2 V at 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 59.3 V at 25.3 A, and operates across –55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients in industrial and automotive systems.
For engineers reviewing the 1.5KE43HE3/73 datasheet, 1.5KE43HE3/73 pinout, 1.5KE43HE3/73 application, or 1.5KE43HE3/73 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJL = 15.4 °C/W), JEDEC 1.5KE package dimensions, and real-world use context - all confirmed from Vishay's official Document Number 88301 (Rev. 09-Aug-2022).
Technical Context
This unidirectional TVS diode employs a glass-passivated silicon junction optimized for fast clamping response (<1 ns) and low incremental surge resistance. Its 1500 W peak pulse power rating is defined under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, and it maintains stable performance up to TJ = 175 °C.
The device exhibits a maximum reverse leakage current of 1.0 µA at its 36.8 V stand-off voltage (VWM), and its forward voltage is 3.5 V at 100 A - consistent with the 1.5KE220A and lower family members. Thermal design is supported by RθJA = 75 °C/W and RθJL = 15.4 °C/W values, enabling reliable operation on PCBs with moderate copper area or lead-mounted heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1.0 mA - defines precise voltage threshold where clamping begins; critical for matching system overvoltage tolerance margins. |
| VWM | 36.8 V - maximum continuous reverse operating voltage; ensures no conduction during normal operation. |
| VC @ IPPM | 59.3 V at 25.3 A - clamped voltage seen by protected circuit during worst-case transient; determines stress on downstream components. |
| PPPM | 1500 W - peak pulse power handling capability under 10/1000 µs waveform; enables protection against high-energy surges like ISO 7637-2 Pulse 5a. |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine); supports robustness against accidental polarity reversal events. |
| TJ range | –55 °C to +175 °C - wide operating junction temperature range suitable for under-hood automotive and industrial environments. |
| RθJL | 15.4 °C/W - low junction-to-lead thermal resistance; allows effective heat transfer through leads without requiring large copper pads. |
Pinout & Package
Package: JEDEC 1.5KE molded epoxy case (Case Style 1.5KE), axial-leaded, RoHS-compliant, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse voltage reference | Connected to lower-potential side of protected line; reverse-biased during clamping event. |
| Cathode | Clamping node / surge return path | Marked with color band; ties to higher-potential rail or ground; carries full transient current during suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable breakdown characteristics and long-term reliability under repeated surge stress. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| 1500 W peak pulse power (10/1000 µs) | Provides margin against high-energy transients such as load dump (ISO 16750-2) and inductive kickback in motor drivers. |
| Clamping response time < 1 ns | Protects sensitive CMOS inputs and gate drivers before voltage overshoot damages oxide layers or triggers latch-up. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., EFT/burst), improving clamping precision. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients per ISO 16750-2. IC Role / Device Role: Primary overvoltage clamp placed between power input and DC-DC converter input stage. Use Value: Clamps to 59.3 V at 25.3 A, limiting stress on downstream regulators while surviving 200 A surge events. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role: Low-capacitance TVS placed at connector interface before signal conditioning amplifier. Use Value: Sub-1 ns response prevents latch-up in op-amps; 1.0 µA leakage at 36.8 V avoids signal offset errors. |
| Telecom Line Surge Protection | MOSFET Gate Driver Protection |
Use Scenario: Safeguarding Ethernet PHY power pins and auxiliary bias rails against lightning-induced surges on outdoor telecom equipment. IC Role / Device Role: Secondary-level TVS on isolated DC supply rails feeding PHY ICs and magnetics. Use Value: 1500 W rating handles 10/700 µs telecom surge waveforms; 175 °C max TJ supports sealed enclosure operation. |
Use Scenario: Preventing gate oxide failure in high-side N-channel MOSFETs driven by microcontrollers in motor control inverters. IC Role / Device Role: Unidirectional TVS tied between gate and source, referenced to driver IC ground. Use Value: 3.5 V forward voltage at 100 A ensures safe turn-on during fault recovery; cathode marking simplifies layout verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | DO-214AA (SMB) package, 600 W PPPM, same VBR range (40.9–45.2 V), lower IPPM (13.9 A), higher VC (69.4 V) | Lower power handling limits use to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 Pulse 5a. | Select SMBJ43A only when board space constraints prohibit axial 1.5KE and surge energy is limited to ≤600 W. |
| 1.5KE43A-E3/54 | Same 1.5KE package and electrical specs, but commercial-grade (non-AEC-Q101), E3 suffix only (no HE3), 1400 pcs/reel vs. 73 pcs/tape-and-reel | Lacks automotive qualification; not approved for under-hood or safety-critical modules requiring AEC-Q101 traceability. | Choose 1.5KE43A-E3/54 for cost-sensitive consumer or industrial applications where AEC-Q101 is not mandated. |
Compared with 1.5KE43HE3/73, SMBJ43A trades off surge capacity and clamping performance for compact surface-mount packaging, while 1.5KE43A-E3/54 retains identical protection capability but omits automotive qualification and uses different packaging - making 1.5KE43HE3/73 the sole choice for AEC-Q101-compliant, high-energy transient protection in constrained tape-and-reel logistics.
Availability
1.5KE43HE3/73 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom line surge suppression, and MOSFET gate driver safeguarding requiring stable component supply across extended production lifecycles.
Supply support for 1.5KE43HE3/73 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, TVS devices, and optoelectronics with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - delivering 1500 W pulse capability, AEC-Q101 compliance, and ruggedized packaging for automotive, industrial, and infrastructure applications.
FAQ
What is the breakdown voltage tolerance for 1.5KE43HE3/73?
The 1.5KE43HE3/73 has a specified breakdown voltage range of 40.9 V to 45.2 V at 1.0 mA test current, representing ±5% tolerance around the nominal 43 V rating. This tight VBR window ensures predictable clamping onset and compatibility with system-level overvoltage thresholds defined in standards like ISO 16750-2. The value is measured per ANSI/IEEE C62.35 and confirmed in Vishay Document 88301.
Is 1.5KE43HE3/73 AEC-Q101 qualified?
Yes, 1.5KE43HE3/73 is AEC-Q101 qualified - explicitly stated in Vishay's documentation (Document 88301, Note 2 on page 3) for the HE3_B revision suffix. This qualification covers temperature cycling, high-temperature reverse bias (HTRB), and ESD testing, making 1.5KE43HE3/73 suitable for automotive applications including engine control units, body electronics, and ADAS subsystems.
What does the "HE3/73" suffix mean in 1.5KE43HE3/73?
The "HE3" portion indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; "/73" denotes a 73-piece tape-and-reel packaging option (vs. /54 for 1400-piece reels). This configuration supports low-volume prototyping and automated assembly of high-reliability automotive boards where traceability and qualification are mandatory.
How does the clamping voltage of 1.5KE43HE3/73 compare to its breakdown voltage?
The 1.5KE43HE3/73 clamps to 59.3 V at its rated peak pulse current of 25.3 A, which is approximately 37% above its minimum breakdown voltage (40.9 V). This VC–VBR margin reflects the device's low dynamic impedance and ensures protected circuits experience minimal overvoltage during surge events - critical for preserving gate oxides in MOSFETs and input stages of precision analog ICs.
Can 1.5KE43HE3/73 be used in bidirectional configurations?
No, 1.5KE43HE3/73 is a unidirectional TVS diode - its part number lacks the "CA" suffix required for bidirectional variants (e.g., 1.5KE43CA). Bidirectional types are only offered from 1.5KE6.8CA to 1.5KE220CA per Vishay's datasheet. Using 1.5KE43HE3/73 in AC or floating applications would result in forward conduction during negative half-cycles, potentially causing failure.
1.5KE43HE3/73 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):
- 34.8V
- Voltage - Breakdown (Min):
- 38.7V
- Voltage - Clamping (Max) @ Ipp:
- 61.9V
- Current - Peak Pulse (10/1000µs):
- 24.2A
- 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
1.5KE43HE3/73 FAQ
1.How can I place an order for 1.5KE43HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43HE3/73 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 1.5KE43HE3/73 reliable?
The price and inventory of 1.5KE43HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE43HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE43HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43HE3/73?
1.5KE43HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43HE3/73 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 1.5KE43HE3/73?
For technical support, including 1.5KE43HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43HE3/73 requirements.
6.How does Aetrix verify that 1.5KE43HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE43HE3/73 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 1.5KE43HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE43HE3/73?
All 1.5KE43HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43HE3/73, 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 1.5KE43HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE43HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE43HE3/73 Tags
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