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Vishay General Semiconductor - Diodes Division 1.5KE440CA-E3/73
- Part No.:
- 1.5KE440CA-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE440CA-E3/73.pdf
- Description:
- TVS DIODE 376VWM 602VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,313
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Product details
Overview
1.5KE440CA-E3/73 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 440 V standoff voltage (VWM), 418–462 V breakdown voltage (VBR) at 1 mA, 602 V maximum clamping voltage (VC) at 2.5 A peak pulse current (IPPM), and 1500 W peak pulse power rating with 10/1000 μs waveform - deployed in industrial power supplies and telecom line interfaces.
For engineers reviewing the 1.5KE440CA-E3/73 datasheet, 1.5KE440CA-E3/73 pinout, 1.5KE440CA-E3/73 application, or 1.5KE440CA-E3/73 equivalent, this part serves as a RoHS-compliant, commercial-grade bidirectional TVS optimized for lightning-induced transients and inductive switching surges in DC bus and AC front-end protection circuits.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 μA leakage at 376 V), then transitions to low-impedance conduction within <1 ns when transient voltage exceeds VBR. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance.
The 1.5KE440CA-E3/73 is rated for -55 °C to +175 °C operating junction temperature, supports 10/1000 μs surge waveforms up to 1500 W, and exhibits a temperature coefficient of VBR at +0.110 %/°C - enabling predictable clamping behavior across thermal extremes in unregulated power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 376 V - maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 418–462 V at 1 mA - precise avalanche initiation range; ensures consistent turn-on across production lots |
| VC (Clamping Voltage) | 602 V at IPPM = 2.5 A - peak voltage seen by protected circuit during full-rated surge; determines downstream component stress |
| PPPM (Peak Pulse Power) | 1500 W (10/1000 μs) - energy-handling capacity for standardized lightning/surge events per IEC 61000-4-5 |
| ID (Reverse Leakage) | 1.0 μA max at VWM - negligible standby power loss and minimal impact on high-impedance sensing nodes |
| TJ max | +175 °C - enables use in high-temperature environments such as enclosed power converters or automotive under-hood locations |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with matte tin-plated leads, UL 94 V-0 molded epoxy body |
Pinout & Package
1.5KE440CA-E3/73 uses the standard DO-201AD (Case Style 1.5KE) axial-leaded package. No polarity marking is present on bidirectional variants; both terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Either terminal conducts during positive or negative overvoltage events; no cathode band marking required |
| Leads (matte tin plated) | PCB interface and thermal path | Solderable per J-STD-002/JESD 22-B102; supports 275 °C solder dip (10 s max); contributes to RθJL = 15.4 °C/W thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating DC lines without polarity concerns |
| 1500 W peak pulse power | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial equipment |
| Sub-nanosecond response time | Clamps transients before sensitive ICs experience overstress - critical for protecting MOSFET gates and microcontroller I/O |
| Glass-passivated junction | Ensures long-term stability of VBR and low parameter drift over temperature and lifetime |
| RoHS-compliant E3 suffix | Meets JEDEC JESD201 Class 1A whisker resistance; suitable for commercial-grade high-reliability applications |
Applications
| AC Power Input Protection | DC Bus Surge Suppression |
|---|---|
Use Scenario: Protecting AC-DC converter inputs against lightning-induced surges on 230 VAC mains lines. IC Role / Device Role: Shunt clamping element placed across live-neutral or live-ground to divert >1 kV transients. Use Value: Limits let-through voltage to ≤602 V, preventing damage to bridge rectifiers and primary-side controllers. |
Use Scenario: Safeguarding 400 V DC bus in solar inverters from switching transients generated by IGBT modules. IC Role / Device Role: Parallel-connected TVS absorbing repetitive inductive kickback energy during PWM commutation. Use Value: Withstands 1500 W pulses at 0.01% duty cycle, maintaining bus integrity without derating at 75 °C ambient. |
| Telecom Line Interface | Industrial Sensor Signal Conditioning |
Use Scenario: Shielding RS-485 transceivers connected to outdoor field wiring exposed to induced surges. IC Role / Device Role: Bidirectional clamp on differential pair (A/B lines) referenced to local ground. Use Value: Symmetric clamping preserves common-mode rejection while limiting differential overvoltage to safe levels for ISO 8482-compliant receivers. |
Use Scenario: Protecting 4–20 mA current loop inputs in PLC analog modules from accidental 24 VDC miswiring or ESD events. IC Role / Device Role: Low-leakage (≤1 μA) shunt device placed across input terminals upstream of precision op-amp circuitry. Use Value: Prevents latch-up or input stage damage without introducing offset error or loading error in high-impedance sensing paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ440CA | Lower PPPM (600 W), smaller SMB package (surface-mount), higher VC (648 V at 2.3 A) | Preferred for space-constrained PCBs; unsuitable for 1500 W surge events | Select when board area is limited and surge threat level is ≤Level 3 per IEC 61000-4-5 |
| 1.5KE440A | Unidirectional variant; same VBR/VC/PPPM but requires correct polarity placement and adds cathode marking | Applicable only where circuit topology enforces defined polarity (e.g., DC output rails) | Choose only if system grounding scheme mandates unidirectional clamping and layout accommodates polarity orientation |
Compared with SMBJ440CA and 1.5KE440A, the 1.5KE440CA-E3/73 uniquely delivers 1500 W bidirectional surge handling in an axial-leaded through-hole package - making it the sole option among these three for high-energy, polarity-agnostic protection in legacy or high-reliability industrial power designs.
Availability
1.5KE440CA-E3/73 is available at Aetrix Electronics and suitable for industrial power supplies, telecom infrastructure equipment, and renewable energy inverters requiring stable component supply and long-term obsolescence management.
Supply support for 1.5KE440CA-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, rectifiers, and protection devices with emphasis on reliability, ruggedness, and application-specific validation.
The 1.5KE series was engineered for high-energy transient suppression in harsh electrical environments - targeting industrial automation, power conversion, and infrastructure systems where failure tolerance and surge survivability are mission-critical.
FAQ
What is the clamping voltage of the 1.5KE440CA-E3/73 under full-rated surge conditions?
The 1.5KE440CA-E3/73 has a maximum clamping voltage (VC) of 602 V when subjected to its rated peak pulse current of 2.5 A using a 10/1000 μs waveform. This value is measured per JEDEC standards and represents the highest voltage the protected circuit will experience during a full 1500 W transient event. The 1.5KE440CA-E3/73 maintains this clamping performance consistently due to its glass-passivated junction and low incremental surge resistance.
Is the 1.5KE440CA-E3/73 suitable for AC line protection?
Yes, the 1.5KE440CA-E3/73 is explicitly designed for bidirectional operation and is commonly used across AC mains inputs - for example, across L-N or L-G in 230 VAC systems - to suppress lightning-induced surges and switching transients. Its 376 V standoff voltage provides adequate margin above peak AC line voltage (≈325 V), and its symmetrical clamping ensures protection during both positive and negative half-cycles. The 1.5KE440CA-E3/73 meets key requirements for IEC 61000-4-5 Level 4 testing.
Does the 1.5KE440CA-E3/73 have AEC-Q101 qualification?
No, the 1.5KE440CA-E3/73 is a commercial-grade part with E3 suffix (RoHS compliant) and is not AEC-Q101 qualified. Per Vishay documentation, AEC-Q101 qualification applies only to 1.5KE6.8CAHE3_B through 1.5KE220CAHE3_B variants. The 1.5KE440CA-E3/73 falls outside that qualified range and is intended for industrial, telecom, and general-purpose applications where automotive-grade stress testing is not required.
How does the 1.5KE440CA-E3/73 compare to unidirectional versions like 1.5KE440A?
The 1.5KE440CA-E3/73 differs from 1.5KE440A solely in polarity configuration: "CA" denotes bidirectional operation with no cathode marking, while "A" indicates unidirectional with cathode band. Both share identical VBR (418–462 V), VC (602 V), PPPM (1500 W), and package. The 1.5KE440CA-E3/73 eliminates polarity-dependent layout constraints and simplifies design for floating or AC-coupled nodes - a key advantage in telecom and sensor interface applications where signal symmetry matters.
What is the thermal resistance of the 1.5KE440CA-E3/73, and how does it affect power dissipation?
The 1.5KE440CA-E3/73 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W and junction-to-ambient resistance (RθJA) of 75 °C/W. Under continuous DC conditions, its 6.5 W power dissipation rating assumes TL = 75 °C on the leads (per Fig. 5). In transient operation, thermal mass absorbs short pulses, but repeated surges require attention to lead length and copper pour - the 1.5KE440CA-E3/73 relies on lead conduction for heat transfer, not PCB pads. Proper lead trimming and mounting maintain thermal performance.
1.5KE440CA-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):
- 376V
- Voltage - Breakdown (Min):
- 418V
- Voltage - Clamping (Max) @ Ipp:
- 602V
- Current - Peak Pulse (10/1000µs):
- 2.5A
- 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
1.5KE440CA-E3/73 FAQ
1.How can I place an order for 1.5KE440CA-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE440CA-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 1.5KE440CA-E3/73 reliable?
The price and inventory of 1.5KE440CA-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 1.5KE440CA-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE440CA-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE440CA-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE440CA-E3/73?
1.5KE440CA-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE440CA-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 1.5KE440CA-E3/73?
For technical support, including 1.5KE440CA-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE440CA-E3/73 requirements.
6.How does Aetrix verify that 1.5KE440CA-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE440CA-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 1.5KE440CA-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE440CA-E3/73?
All 1.5KE440CA-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE440CA-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 1.5KE440CA-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE440CA-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE440CA-E3/73 Tags
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