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Vishay General Semiconductor - Diodes Division 1.5KE43C-E3/73
- Part No.:
- 1.5KE43C-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43C-E3/73.pdf
- Description:
- TVS DIODE 34.8VWM 61.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,474
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Product details
Overview
1.5KE43C-E3/73 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on signal and power lines. It features a 43 V breakdown voltage (VBR = 40.9–45.2 V at IT = 1.0 mA), 36.8 V standoff voltage (VWM), 59.3 V maximum clamping voltage (VC) at 25.3 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates from −55 °C to +175 °C - used in automotive sensor protection and industrial I/O interface surge hardening.
For engineers reviewing the 1.5KE43C-E3/73 datasheet, 1.5KE43C-E3/73 pinout, 1.5KE43C-E3/73 application, or 1.5KE43C-E3/73 equivalent, this part serves as a high-energy, fast-response (≤1 ns), glass-passivated TVS for bidirectional line protection where UL 94 V-0 molded epoxy packaging and JESD22-B106-compliant solderability are required.
Technical Context
This device implements a silicon avalanche junction structure optimized for transient suppression in both polarities, with symmetrical breakdown behavior confirmed per JEDEC-type testing. Its unidirectional counterpart (1.5KE43A) shares identical package, thermal resistance (RθJA = 75 °C/W), and pulse rating but differs in polarity marking and forward conduction path.
The 1.5KE43C-E3/73 is rated for 1500 W peak pulse power under 10/1000 µs waveform with ≤0.01% duty cycle, and exhibits low incremental surge resistance enabling effective clamping during lightning-induced surges (e.g., IEC 61000-4-5 Level 4). It supports AEC-Q101 qualification when ordered with HE3 suffix (not applicable to -E3/73).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1.0 mA - defines reliable turn-on threshold for bidirectional overvoltage events |
| VWM | 36.8 V - maximum continuous working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 59.3 V at 25.3 A - clamped voltage seen by protected circuit during full-rated surge |
| PPPM | 1500 W (10/1000 µs) - energy-handling capacity for transient suppression without failure |
| Junction Temp Range | −55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 compliant |
| Leakage @ VWM | ≤1.0 µA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with matte tin-plated leads; meets J-STD-002/JESD22-B102 solderability and JESD201 Class 1A whisker resistance (E3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative transients; symmetric with cathode in bidirectional operation |
| Cathode | Transient current entry (positive polarity) | Accepts reverse surge current during positive transients; no color band marking for bidirectional types |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repetitive surge stress |
| Bidirectional symmetry | Identical VBR, VC, and IPPM performance in both directions - eliminates polarity concerns in AC or floating-line designs |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 combination wave (1.2/50 µs voltage, 8/20 µs current) up to Level 4 without degradation |
| Fast response time | ≤1 ns clamping activation - protects downstream ICs before voltage overshoot damages gate oxides or ESD-sensitive nodes |
| UL 94 V-0 molding | Self-extinguishing epoxy housing prevents flame propagation in safety-critical enclosures and automotive modules |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and temperature/pressure sensors from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential signal pair or supply rail to shunt surge energy to ground. Use Value: Limits induced transients to ≤59.3 V, preventing latch-up or permanent damage to 3.3 V/5 V sensor front-ends and microcontrollers. | Use Scenario: Safeguarding 4–20 mA current loop inputs against field-wiring induced surges in factory automation systems. IC Role / Device Role / Timing Role: Standoff-connected TVS between signal and return, activated only during >36.8 V excursions. Use Value: Maintains <1.0 µA leakage at 24 V nominal, preserving loop accuracy while clamping 1 kV/500 A transients per IEC 61000-4-5. |
| Telecom Line Card Protection | Consumer Power Adapter EMI Filter |
Use Scenario: Secondary-side surge protection on Ethernet PHY power rails and data lines in PoE-powered switches. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF), fast-acting clamp parallel to DC-DC converter input. Use Value: Prevents 1500 W surges from propagating into isolated DC-DC stages, avoiding secondary-side regulator failure. | Use Scenario: Input-stage transient suppression on AC-DC adapter primary-side rectifier outputs. IC Role / Device Role / Timing Role: Bidirectional clamp across bulk capacitor to absorb switching spikes and lightning surges. Use Value: Withstands repeated 10/1000 µs surges up to 25.3 A without parameter shift, extending adapter lifetime in mains-connected applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | DO-214AA (SMB) package, lower PPPM = 600 W, VC = 69.4 V @ 8.7 A | Surface-mount only; unsuitable for through-hole legacy boards or high-current chassis grounding | Select when board space is constrained and surge energy is ≤600 W; verify layout thermal relief for SMB footprint |
| 1.5SMC43CA | DO-214AB (SMC) package, PPPM = 1500 W, VC = 69.4 V @ 21.5 A, higher RθJA = 110 °C/W | Same power rating but higher clamping voltage and worse thermal performance than 1.5KE43C-E3/73 | Choose only if SMC footprint is mandated; derate power above 75 °C ambient due to inferior thermal resistance |
Compared with SMBJ43CA and 1.5SMC43CA, the 1.5KE43C-E3/73 delivers superior clamping (59.3 V vs. ≥69.4 V), lower thermal resistance (75 vs. ≥110 °C/W), and axial-leaded mechanical robustness - making it preferred for high-reliability through-hole deployments where surge energy and thermal margin are critical.
Availability
1.5KE43C-E3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, telecom line card protection, and consumer power adapter EMI filtering requiring stable component supply across extended temperature ranges and high-surge environments.
Supply support for 1.5KE43C-E3/73 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power handling, and automotive-grade qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting applications demanding ruggedized, axial-leaded TVS devices with proven performance in automotive, industrial, and telecom infrastructure.
FAQ
What is the breakdown voltage tolerance of the 1.5KE43C-E3/73?
The 1.5KE43C-E3/73 has a specified breakdown voltage range of 40.9 V to 45.2 V at test current IT = 1.0 mA, representing ±5% tolerance about the nominal 43 V rating. This tight VBR spread ensures consistent clamping behavior across production lots and supports predictable system-level surge margin design without over-engineering.
Is the 1.5KE43C-E3/73 RoHS compliant and lead-free?
Yes, the 1.5KE43C-E3/73 carries the E3 suffix, indicating full RoHS compliance per Directive 2011/65/EU and lead-free construction. Its matte tin-plated leads meet J-STD-002 and JESD22-B102 solderability standards, and it passes JESD201 Class 1A whisker testing - confirming suitability for modern lead-free reflow and wave soldering processes.
Does the 1.5KE43C-E3/73 require a heatsink for 1500 W pulse handling?
No heatsink is required for single-pulse 1500 W operation, as the 1.5KE43C-E3/73 relies on its thermal mass and short-duration pulse (10/1000 µs) to absorb energy without exceeding TJ(max) = 175 °C. However, repetitive pulsing above 0.01% duty cycle requires thermal derating per Fig. 2 in the datasheet, and sustained power dissipation must remain below PD = 6.5 W.
How does the 1.5KE43C-E3/73 differ from the unidirectional 1.5KE43A-E3/73?
The 1.5KE43C-E3/73 is bidirectional with symmetrical clamping in both polarities and no polarity marking, whereas the 1.5KE43A-E3/73 is unidirectional with a cathode band and conducts forward current only in one direction. Their VBR, VC, and PPPM ratings are identical, but the 1.5KE43A-E3/73 has a specified VF = 3.5 V at 100 A, while the 1.5KE43C-E3/73 does not define forward voltage due to bidirectional symmetry.
Can the 1.5KE43C-E3/73 be used in AEC-Q101 qualified designs?
The 1.5KE43C-E3/73 itself is not AEC-Q101 qualified; qualification applies only to variants with the HE3 suffix (e.g., 1.5KE43CAHE3_B). For automotive applications requiring AEC-Q101, specify the HE3 version - the -E3/73 variant is commercial grade and intended for industrial, telecom, and consumer use where automotive qualification is not mandated.
1.5KE43C-E3/73 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:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE43C-E3/73 FAQ
1.How can I place an order for 1.5KE43C-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43C-E3/73 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 1.5KE43C-E3/73 reliable?
The price and inventory of 1.5KE43C-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE43C-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE43C-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43C-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43C-E3/73?
1.5KE43C-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43C-E3/73 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 1.5KE43C-E3/73?
For technical support, including 1.5KE43C-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43C-E3/73 requirements.
6.How does Aetrix verify that 1.5KE43C-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE43C-E3/73 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 1.5KE43C-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE43C-E3/73?
All 1.5KE43C-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43C-E3/73, 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 1.5KE43C-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE43C-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE43C-E3/73 Tags
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