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Vishay General Semiconductor - Diodes Division 1.5KE43CHE3/54
- Part No.:
- 1.5KE43CHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43CHE3/54.pdf
- Description:
- TVS DIODE 34.8VWM 61.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,491
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Product details
Overview
1.5KE43CHE3/54 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 mA), 36.8 V maximum working voltage (VWM), 59.3 V clamping voltage (VC) at 25.3 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in industrial power supplies and automotive control modules.
For engineers reviewing the 1.5KE43CHE3/54 datasheet, 1.5KE43CHE3/54 pinout, 1.5KE43CHE3/54 application, or 1.5KE43CHE3/54 equivalent, this page delivers verified electrical parameters, JEDEC-standard 1.5KE package details, AEC-Q101 qualification status, thermal derating behavior, and direct alternative part comparisons - all grounded in Vishay Document #88301 (Rev. 09-Aug-2022).
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 36.8 V), but triggers into low-impedance conduction when transient voltage exceeds its 40.9–45.2 V breakdown range. Its glass-passivated junction enables sub-nanosecond response time and stable clamping performance across -55 °C to +175 °C junction temperature.
It is rated for 1500 W non-repetitive peak pulse power (10/1000 µs), supports 200 A IFSM surge current (8.3 ms half-sine), and exhibits 0.101 %/°C temperature coefficient of VBR. The device is RoHS-compliant (E3 suffix), AEC-Q101 qualified (HE3 variant), and meets UL 94 V-0 flammability requirements in its molded epoxy case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1 mA - defines precise voltage threshold where clamping begins, critical for margining against system overvoltage limits |
| VWM | 36.8 V - maximum continuous reverse operating voltage; must exceed nominal rail voltage (e.g., 33 V or 36 V systems) to avoid leakage-induced power loss |
| VC @ IPPM | 59.3 V at 25.3 A - clamped voltage seen by protected circuit during worst-case transient; determines survivability of downstream components |
| PPPM | 1500 W (10/1000 µs) - peak transient energy absorption capacity; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) |
| IFSM | 200 A (8.3 ms half-sine) - surge current handling for inductive switching events like relay coil de-energization or motor commutation |
| TJ max. | +175 °C - maximum junction temperature; supports operation in under-hood automotive or high-ambient industrial environments |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient; informs heatsinking requirements when operating near power dissipation limit (PD = 6.5 W) |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Dimensions: 5.3 mm diameter × 9.5 mm length (0.210" × 0.375").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-potential node; polarity marked by absence of band (unidirectional devices use cathode band) |
| Cathode | High-side transient sink | Connected to protected line (e.g., 36 V rail); absorbs surge current into ground path during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power (10/1000 µs) | Supports robust protection against lightning-induced surges per IEC 61000-4-5 and ISO 7637-2 Pulse 5a |
| AEC-Q101 qualified (HE3 variant) | Validated for automotive powertrain and body electronics applications requiring zero defect reliability |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed enclosures - required for industrial safety certifications (IEC 62368-1) |
| 0.101 %/°C VBR tempco | Minimizes drift in clamping threshold across operating temperature range, enabling consistent protection margin |
Applications
| Automotive Power Supply Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 36 V battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5a, up to 60 V/100 ms). IC Role / Device Role / Timing Role: Shunt TVS placed between supply rail and chassis ground; clamps within <1 ns to limit voltage seen by DC-DC converters and microcontrollers. Use Value: Prevents latch-up or permanent damage to 40 V-rated power management ICs during 12 V/24 V system load dump events. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-input; suppresses negative-going transients and positive surges above VWM. Use Value: Eliminates false triggering and extends service life of optocoupler input stages subjected to repetitive 100 V/1 A inductive spikes. |
| Telecom DC Power Feeds | Sensor Signal Line Protection |
Use Scenario: Securing -48 V telecom rectifier outputs against lightning-induced common-mode surges on central office distribution lines. IC Role / Device Role / Timing Role: Paired unidirectional TVS (cathode to -48 V, anode to ground) provides low-clamp protection without affecting steady-state bias. Use Value: Maintains <59.3 V clamp level relative to ground, ensuring downstream DC-DCs and PMICs remain within absolute maximum ratings. | Use Scenario: Shielding analog sensor outputs (e.g., 4–20 mA loop transmitters) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS placed across signal and return lines; leverages fast response (<1 ns) to prevent op-amp saturation or ADC corruption. Use Value: Limits transient overshoot to ≤59.3 V while adding <0.5 pF parasitic capacitance - preserving bandwidth in 100 kHz sensor signals. |
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 package (smaller footprint), 43 V VBR, 69.4 V VC @ 21.7 A, 600 W PPPM | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump | Select when board space is constrained and surge energy is ≤600 W; verify layout clearance for higher VC margin |
| 1.5KE43A-E3/54 | Same 1.5KE package and electrical specs, but commercial-grade (non-AEC-Q101) | Not qualified for automotive under-hood use; acceptable for industrial/commercial power supplies | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with 1.5KE43CHE3/54, SMBJ43A offers smaller size but sacrifices 60 % peak power and higher clamping voltage, while 1.5KE43A-E3/54 matches form-fit-function but lacks automotive qualification - making 1.5KE43CHE3/54 the only option meeting both 1500 W surge capability and AEC-Q101 compliance in the 1.5KE family.
Availability
1.5KE43CHE3/54 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input conditioning, and telecom DC feed safeguarding requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE43CHE3/54 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, power efficiency, and automotive-grade validation.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive power systems, industrial controls, and telecom infrastructure where failure due to voltage surges is unacceptable.
FAQ
What is the breakdown voltage range for 1.5KE43CHE3/54?
The 1.5KE43CHE3/54 has a guaranteed breakdown voltage (VBR) range of 40.9 V to 45.2 V at 1 mA test current, per Vishay Document #88301. This tight tolerance ensures predictable clamping onset across manufacturing lots and temperature extremes. The value is measured under standardized JEDEC conditions and directly impacts system-level overvoltage margin design - engineers must ensure nominal operating voltage remains below the minimum VBR minus safety margin. 1.5KE43CHE3/54 maintains this specification across its full -55 °C to +175 °C operating junction temperature range.
Is 1.5KE43CHE3/54 AEC-Q101 qualified?
Yes, 1.5KE43CHE3/54 is AEC-Q101 qualified, as confirmed in Vishay Document #88301 (Rev. 09-Aug-2022), footnote (2) on page 3. The "HE3" suffix denotes RoHS compliance and AEC-Q101 qualification for the 1.5KE6.8AHE3_B through 1.5KE220AHE3_B variants. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating suitability for automotive powertrain and body electronics. 1.5KE43CHE3/54 is therefore approved for under-hood and chassis-mounted applications where zero-defect reliability is mandatory.
What is the clamping voltage of 1.5KE43CHE3/54 at maximum rated surge current?
The 1.5KE43CHE3/54 clamps to a maximum of 59.3 V at its rated peak pulse current (IPPM) of 25.3 A, using the standard 10/1000 µs double-exponential waveform. This value is specified in the Electrical Characteristics table on page 2 of Vishay Document #88301. It represents the worst-case voltage imposed on protected circuitry during a full-power transient event. Designers use this parameter to verify that downstream components - such as 60 V-rated MOSFETs or 50 V-input DC-DC controllers - remain within their absolute maximum voltage ratings. 1.5KE43CHE3/54 achieves this low clamping ratio (VC/VBR ≈ 1.35) via low incremental surge resistance.
Can 1.5KE43CHE3/54 be used in bidirectional configurations?
No, 1.5KE43CHE3/54 is a unidirectional TVS diode and cannot be used for bidirectional protection. Per Vishay Document #88301, bidirectional variants in the 1.5KE family use the "CA" suffix (e.g., 1.5KE43CA), and the datasheet explicitly states bidirectional types are available only from 1.5KE6.8CA to 1.5KE220CA. The "HE3" suffix on 1.5KE43CHE3/54 confirms it is the AEC-Q101-qualified unidirectional version. Using 1.5KE43CHE3/54 in AC or dual-polarity circuits would result in forward conduction during negative half-cycles, causing failure. For bidirectional needs, specify 1.5KE43CAHE3/54 instead.
What package type and lead finish does 1.5KE43CHE3/54 use?
1.5KE43CHE3/54 uses the JEDEC-standard DO-201AD package (Case Style 1.5KE), with axial leads and molded epoxy body meeting UL 94 V-0 flammability rating. Its leads are matte tin-plated and certified solderable per J-STD-002 and JESD 22-B102. The "E3" suffix indicates RoHS compliance and JESD 201 Class 1A whisker resistance. Physical dimensions are 5.3 mm diameter × 9.5 mm length (0.210" × 0.375"), and the device is supplied in 13" paper tape and reel (1400 units per reel, package code "54"). This package enables high-power dissipation and mechanical robustness in automated assembly and high-vibration environments.
1.5KE43CHE3/54 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:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE43CHE3/54 FAQ
1.How can I place an order for 1.5KE43CHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43CHE3/54 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 1.5KE43CHE3/54 reliable?
The price and inventory of 1.5KE43CHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE43CHE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE43CHE3/54?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43CHE3/54?
1.5KE43CHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43CHE3/54 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 1.5KE43CHE3/54?
For technical support, including 1.5KE43CHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43CHE3/54 requirements.
6.How does Aetrix verify that 1.5KE43CHE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE43CHE3/54 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 1.5KE43CHE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE43CHE3/54?
All 1.5KE43CHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43CHE3/54, 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 1.5KE43CHE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE43CHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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