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Vishay General Semiconductor - Diodes Division 1.5KE43AHE3_B/C
- Part No.:
- 1.5KE43AHE3_B/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43AHE3_B/C.pdf
- Description:
- 1.5KW,43V 5%,UNIDIR,AXIAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,239
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Product details
Overview
1.5KE43AHE3_B/C from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC 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 range - deployed in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1.5KE43AHE3_B/C datasheet, 1.5KE43AHE3_B/C pinout, 1.5KE43AHE3_B/C application, or 1.5KE43AHE3_B/C equivalent, this page delivers verified electrical parameters, thermal derating behavior, AEC-Q101 qualification status, RoHS-compliant packaging details, and real-world use context for ESD and lightning surge hardening in 12 V/24 V systems.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 µs transients. Its 1.5KE package supports 200 A non-repetitive forward surge current (IFSM) and exhibits 0.101 %/°C temperature coefficient of VBR.
Designed for placement directly across protected nodes, it operates with 36.8 V maximum working voltage (VWM) and 1.0 µA max reverse leakage at VWM, enabling reliable hold-off in 36 V nominal systems while triggering fast during line surges exceeding 40.9 V.
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 for avalanche conduction onset |
| VWM | 36.8 V - maximum continuous DC or RMS voltage the device blocks without leakage exceeding 1.0 µA |
| VC @ IPPM | 59.3 V at 25.3 A - clamped voltage seen by downstream circuit during full 1500 W transient |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity per industry-standard waveform |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments |
| Package | Case Style 1.5KE - axial-lead DO-201AD package with matte tin-plated leads, UL 94 V-0 molding |
| AEC-Q101 | Qualified (HE3 suffix) - validated for automotive-grade reliability per stress test requirements |
Pinout & Package
1.5KE43AHE3_B/C uses the standard DO-201AD (Case Style 1.5KE) axial-leaded package. The cathode is marked by a color band on the body; polarity must be observed for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or lower-potential rail; forms return path during clamping |
| Cathode | Protected line input | Connected to the line being protected (e.g., 12 V supply); avalanche initiates here when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling |
| 1500 W peak pulse rating | Handles high-energy transients such as ISO 7637-2 Pulse 5a (load dump) in automotive 12 V systems |
| Sub-nanosecond response | Clamps within <1 ns - faster than MOVs or polymer-based protectors, preserving IC integrity |
| AEC-Q101 qualified (HE3) | Validated for automotive electronics per stress tests including HTGB, HTRB, and TCT |
| RoHS-compliant & JESD 201 Class 2 whisker resistant | Meets global environmental compliance and mitigates tin whisker risk in high-reliability assemblies |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and jump-start surges per ISO 7637-2. IC Role / Device Role: Primary shunt clamp placed between power rail and chassis ground. Use Value: Limits transient voltage to ≤59.3 V, preventing damage to 36 V-rated DC-DC converters and microcontrollers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors exposed to cable-borne EFT and lightning-induced surges. IC Role / Device Role: Low-capacitance shunt protector on 0–5 V or 4–20 mA signal paths. Use Value: Maintains signal fidelity with <1.0 µA leakage at 36.8 V, while clamping 1 kV/µs transients before they reach ADC front-end. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Inputs |
Use Scenario: Overvoltage suppression on -48 V telecom rectifier outputs subject to switching transients and induced surges. IC Role / Device Role: Unidirectional rail clamp referenced to system ground. Use Value: Withstands 200 A non-repetitive surge (IFSM) and provides consistent clamping across –40 °C to +85 °C operating range. | Use Scenario: Input stage protection for BLDC motor controllers in washing machines and HVAC systems. IC Role / Device Role: Back-to-back TVS not required - single unidirectional device suffices for DC bus overvoltage events. Use Value: Enables compact layout with DO-201AD footprint and eliminates need for series impedance in high-current paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | DO-214AA package (SMB), 600 W PPPM, same VBR range (40.9–45.2 V), lower IPPM (13.9 A) | Lower surge capacity; suited for space-constrained PCBs where 1500 W is not required | Select SMBJ43A only if board area is critical and surge threat level is limited to IEC 61000-4-5 Level 3 (0.5 kV/1.0 kV) |
| 1.5KE43CA | Bidirectional variant, same package and PPPM, symmetric VBR (±40.9–45.2 V), no polarity marking | Required for AC-coupled or floating signal lines where voltage reversal occurs | Choose 1.5KE43CA only when protecting differential pairs or AC signals - not a drop-in replacement for unidirectional use |
Compared with SMBJ43A and 1.5KE43CA, the 1.5KE43AHE3_B/C uniquely combines AEC-Q101 qualification, 1500 W capability in an axial package, and commercial+automotive dual-grade availability - making it optimal for high-energy, high-reliability DC rail protection where leaded mounting and proven field performance are prioritized.
Availability
1.5KE43AHE3_B/C is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial sensor interfaces, telecom DC feeds, and consumer appliance motor drive circuits requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE43AHE3_B/C 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 family was engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure due to voltage surges must be eliminated through proven 1500 W clamping performance and AEC-Q101 validation.
FAQ
What is the breakdown voltage tolerance for 1.5KE43AHE3_B/C?
The 1.5KE43AHE3_B/C 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 in 36 V nominal systems and aligns with JEDEC standard 1.5KE series tolerances. The 1.5KE43AHE3_B/C maintains this specification across its full operating temperature range.
Is 1.5KE43AHE3_B/C suitable for automotive applications?
Yes, 1.5KE43AHE3_B/C is AEC-Q101 qualified (denoted by HE3 suffix) and tested per stress requirements including high-temperature reverse bias, temperature cycling, and unbiased highly accelerated stress testing. It is rated for junction temperatures up to +175 °C and used in automotive power modules, body control units, and infotainment power supplies - meeting ISO 7637-2 Pulse 5a load dump immunity requirements when properly mounted with adequate thermal relief.
How does the clamping voltage of 1.5KE43AHE3_B/C compare to its breakdown voltage?
The 1.5KE43AHE3_B/C clamps at 59.3 V when subjected to its full 25.3 A peak pulse current (10/1000 µs), which is approximately 37% above its minimum breakdown voltage of 40.9 V. This incremental clamping voltage (ΔVC = 18.4 V) reflects low dynamic impedance and ensures protected circuits experience minimal overvoltage during surge events - critical for safeguarding 40 V-rated MOSFETs and 3.3 V/5 V logic interfaces downstream of the 1.5KE43AHE3_B/C.
What is the meaning of the "HE3_B/C" suffix in 1.5KE43AHE3_B/C?
The "HE3" indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 tin whisker resistance; "B" denotes the revision code per Vishay's internal change control; "/C" specifies packaging in 13" paper tape and reel (1400 pcs/reel). This full suffix confirms the 1.5KE43AHE3_B/C meets automotive-grade reliability, environmental compliance, and automated assembly requirements - distinct from commercial-only E3 variants.
Can 1.5KE43AHE3_B/C be used in bidirectional signal protection?
No, 1.5KE43AHE3_B/C is strictly unidirectional and must be oriented with cathode toward the protected line. For bidirectional protection (e.g., RS-485, CAN, or AC-coupled analog lines), the 1.5KE43CA variant is required - it features symmetrical breakdown in both polarities and no polarity marking. Using 1.5KE43AHE3_B/C on bidirectional signals risks forward conduction during negative transients and invalidates its clamping specification.
1.5KE43AHE3_B/C 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 26A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE43AHE3_B/C FAQ
1.How can I place an order for 1.5KE43AHE3_B/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43AHE3_B/C 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 1.5KE43AHE3_B/C reliable?
The price and inventory of 1.5KE43AHE3_B/C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE43AHE3_B/C is usually 5 days.
3.What payment methods are accepted for 1.5KE43AHE3_B/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43AHE3_B/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43AHE3_B/C?
1.5KE43AHE3_B/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43AHE3_B/C 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 1.5KE43AHE3_B/C?
For technical support, including 1.5KE43AHE3_B/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43AHE3_B/C requirements.
6.How does Aetrix verify that 1.5KE43AHE3_B/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE43AHE3_B/C 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 1.5KE43AHE3_B/C meets industry standards.
7.What is the process for return or replacement of 1.5KE43AHE3_B/C?
All 1.5KE43AHE3_B/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43AHE3_B/C, 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 1.5KE43AHE3_B/C part is unused and in its original packaging.
Return procedure for 1.5KE43AHE3_B/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE43AHE3_B/C Tags
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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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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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