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Vishay General Semiconductor - Diodes Division 1.5KE43-E3/54
- Part No.:
- 1.5KE43-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43-E3/54.pdf
- Description:
- TVS DIODE 34.8VWM 61.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,066
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Product details
Overview
1.5KE43-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of 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 capability with a 10/1000 µs waveform - used in automotive power supply inputs, industrial sensor interfaces, and telecom line protection.
For engineers reviewing the 1.5KE43-E3/54 datasheet, 1.5KE43-E3/54 pinout, 1.5KE43-E3/54 application, or 1.5KE43-E3/54 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping performance under surge conditions, thermal derating behavior, and direct alternatives for ESD/lightning transient suppression in 24 V and 48 V systems.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds its breakdown threshold (VBR), it avalanches rapidly (<1 ns response) to divert surge current away from downstream ICs or MOSFETs. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and low incremental surge resistance, critical for repeatable clamping across temperature.
The device is rated for 175 °C maximum junction temperature and exhibits a +0.101 %/°C temperature coefficient of VBR, enabling predictable performance in automotive under-hood environments. Its 1500 W pulse rating applies only with ≤0.01 % duty cycle - validated per JEDEC-standard 10/1000 µs waveform testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1 mA - defines precise avalanche onset window for reliable triggering without false trips |
| VWM | 36.8 V - maximum continuous DC operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 59.3 V at 25.3 A - clamping voltage during 10/1000 µs surge; limits stress on protected 48 V logic or gate drivers |
| PPPM | 1500 W - peak pulse power handling for single-event transients like ISO 7637-2 Pulse 1/2b or IEC 61000-4-5 |
| TJ max | +175 °C - enables use in high-temperature engine control units and industrial motor drives |
| RθJL | 15.4 °C/W - low junction-to-lead thermal resistance supports sustained surge dissipation without heatsinking |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-voltage rail; forms shunt path during reverse overvoltage |
| Cathode | Protected line input | Connected to line being protected (e.g., 24 V supply); color band identifies polarity |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA at VWM) over 10+ year field life |
| 1500 W peak pulse power (10/1000 µs) | Withstands automotive load dump surges (ISO 16750-2) and telecom lightning strikes (IEC 61000-4-5 Level 4) |
| Sub-nanosecond response time | Clamps within <1 ns - faster than MOVs or polymer-based protectors, preserving signal integrity |
| AEC-Q101 qualification (HE3 variants) | Validated for automotive electronics; not applicable to E3/54 - commercial-grade version |
| UL 94 V-0 molding compound | Self-extinguishing epoxy meets fire-safety requirements for enclosed industrial enclosures |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V supply input of an engine control module (ECM) against load dump transients up to 120 V. IC Role / Device Role / Timing Role: Shunt TVS diode placed between VIN and GND; clamps excess energy before it reaches DC-DC converter input stage. Use Value: Limits peak voltage seen by downstream regulator to ≤59.3 V, preventing overvoltage failure of 60 V-rated input capacitors and MOSFETs. | Use Scenario: Safeguarding analog output (4–20 mA) loop of a pressure sensor exposed to ESD and cable-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS connected across sensor output and return; absorbs fast transients without affecting DC accuracy. Use Value: Maintains signal fidelity with <1 µA leakage at 36.8 V, while clamping 25 A surges to <60 V - preserving 24 V loop compliance. |
| Telecom DC Power Feeding Protection | Consumer Power Adapter Output Clamping |
Use Scenario: Securing -48 V DC feed line in passive optical network (PON) equipment against lightning-induced surges. IC Role / Device Role / Timing Role: Reverse-biased TVS on negative rail; conducts only during overvoltage events, remaining invisible during normal operation. Use Value: Withstands 1500 W pulses without degradation, ensuring multi-year reliability in outdoor cabinets per GR-1089-CORE. | Use Scenario: Adding secondary overvoltage protection at USB-C PD adapter output to prevent damage from feedback loop faults. IC Role / Device Role / Timing Role: Final-stage TVS on regulated 20 V output; acts as fail-safe clamp if primary regulation fails. Use Value: Clamps faulted output to ≤59.3 V within nanoseconds - protecting connected devices beyond USB PD specification limits. |
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), lower PPPM = 600 W, same VBR range (40.9–45.2 V) | Preferred for space-constrained PCBs; insufficient for ISO 7637-2 Pulse 5a (load dump) | Select SMBJ43A only when board area is critical and surge energy is limited to IEC 61000-4-2/4-4 level |
| 1.5KE43AHE3_B | Identical electrical specs, but AEC-Q101 qualified and RoHS-compliant HE3 suffix; same DO-201AD package | Required for automotive production; E3/54 is commercial grade only | Choose 1.5KE43AHE3_B for Tier 1 automotive designs; 1.5KE43-E3/54 suits industrial/commercial cost-sensitive builds |
Compared with 1.5KE43-E3/54, SMBJ43A trades 60 % lower surge capacity for 40 % smaller footprint, while 1.5KE43AHE3_B provides identical protection with automotive qualification - making the original ideal for non-automotive 1500 W surge applications where cost and legacy compatibility matter.
Availability
1.5KE43-E3/54 is available at Aetrix Electronics and suitable for automotive power inputs, industrial sensor interfaces, telecom DC feeding, and consumer power adapter outputs requiring stable component supply and long-term obsolescence management.
Supply support for 1.5KE43-E3/54 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, rectifiers, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting ISO 7637-2, IEC 61000-4-5, and GR-1089-CORE compliance in automotive, industrial, and telecom infrastructure.
FAQ
What is the maximum clamping voltage of the 1.5KE43-E3/54 under a 10/1000 µs surge?
The 1.5KE43-E3/54 clamps to a maximum of 59.3 V at its rated peak pulse current of 25.3 A (10/1000 µs waveform). This value is measured per JEDEC standard test conditions and represents the upper limit of voltage imposed on protected circuitry during a full-power transient event. Engineers must ensure downstream components tolerate this clamping level - especially 60 V-rated MOSFETs or regulators - and verify layout parasitics do not elevate actual clamping due to inductance.
Is the 1.5KE43-E3/54 RoHS compliant and lead-free?
Yes, the 1.5KE43-E3/54 is RoHS compliant and lead-free. The "E3" suffix explicitly denotes Vishay's commercial-grade, RoHS-compliant variant with matte tin-plated leads meeting J-STD-002 solderability requirements. It also passes JESD 201 Class 1A whisker testing, confirming long-term reliability in thermal cycling environments without tin whisker growth risk.
Does the 1.5KE43-E3/54 have AEC-Q101 qualification?
No, the 1.5KE43-E3/54 does not carry AEC-Q101 qualification. It is a commercial-grade part. For automotive applications requiring qualification, the functionally identical 1.5KE43AHE3_B variant is available - which includes full AEC-Q101 stress testing and is marked with the HE3 suffix and revision code (e.g., "B"). Always verify qualification status via the full part number and Vishay's official datasheet.
What is the standoff voltage (VWM) of the 1.5KE43-E3/54, and why does it matter?
The 1.5KE43-E3/54 has a maximum working voltage (VWM) of 36.8 V - the highest DC or RMS voltage that can be continuously applied without exceeding 1 µA leakage current. This parameter ensures the device remains non-conductive during normal operation, avoiding power loss or false triggering. It must exceed the system's maximum steady-state voltage (e.g., 32 V for a 24 V nominal bus) while leaving margin below VBR to accommodate tolerance and temperature drift.
Can the 1.5KE43-E3/54 be used in bidirectional configurations?
No, the 1.5KE43-E3/54 is a unidirectional TVS diode. Bidirectional versions require the "CA" suffix (e.g., 1.5KE43CA), which internally connects two diodes in series opposition. Using a unidirectional part like 1.5KE43-E3/54 in AC or floating applications risks forward conduction and failure. For bidirectional protection at ~43 V, specify 1.5KE43CA - noting its VWM is 36.8 V and VC is higher (≈67 V) due to dual-junction architecture.
1.5KE43-E3/54 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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE43-E3/54 FAQ
1.How can I place an order for 1.5KE43-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43-E3/54 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 1.5KE43-E3/54 reliable?
The price and inventory of 1.5KE43-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE43-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE43-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43-E3/54?
1.5KE43-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43-E3/54 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 1.5KE43-E3/54?
For technical support, including 1.5KE43-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43-E3/54 requirements.
6.How does Aetrix verify that 1.5KE43-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE43-E3/54 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 1.5KE43-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE43-E3/54?
All 1.5KE43-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43-E3/54, 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 1.5KE43-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE43-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE43-E3/54 Tags
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