My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE350CA-E3/51
- Part No.:
- 1.5KE350CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE350CA-E3/51.pdf
- Description:
- TVS DIODE 300VWM 482VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,071
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE350CA-E3/51 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 350 V standoff voltage (VWM), 333–368 V breakdown voltage (VBR) at 1 mA, 482 V clamping voltage (VC) at 3.1 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform. It is used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom line cards.
For engineers reviewing the 1.5KE350CA-E3/51 datasheet, 1.5KE350CA-E3/51 pinout, 1.5KE350CA-E3/51 application, or 1.5KE350CA-E3/51 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, JEDEC 1.5KE package details, thermal derating curves, and direct alternative part comparisons - all aligned with Vishay Document #88301 (Rev. 09-Aug-2022).
Technical Context
This TVS diode operates symmetrically in both directions due to its CA suffix designation, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at VWM), while the 10/1000 μs pulse rating reflects standardized surge immunity testing per R.E.A. and ANSI/IEEE C62.35.
Clamping performance is defined by VC = 482 V at IPPM = 3.1 A, with incremental surge resistance derived from ΔVC/ΔIPPM slope analysis. Thermal limits include TJ(max) = 175 °C and RθJL = 15.4 °C/W, supporting lead-mounted dissipation up to 6.5 W at TL = 75 °C - critical for sustained transient events in enclosed industrial enclosures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 300 V - maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 333–368 V at IT = 1 mA - precise voltage range where avalanche conduction initiates reliably under transient stress |
| VC (Clamping Voltage) | 482 V at IPPM = 3.1 A - peak voltage seen by protected circuit during full-rated 1500 W surge, limiting stress on downstream components |
| PPPM (Peak Pulse Power) | 1500 W - energy-handling capacity for 10/1000 μs waveform, enabling robust lightning and EFT protection per IEC 61000-4-5 |
| TJ(max) | 175 °C - maximum junction temperature allowing operation in high-ambient environments such as base station power modules |
| RθJL | 15.4 °C/W - thermal resistance from junction to lead, enabling accurate PCB trace heat sinking design for sustained surge duty |
| Leakage ID | <1 μA at VWM - negligible standby current ensuring no impact on high-impedance sensor bias networks |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body meeting UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Acts as cathode during positive transients; no polarity marking - symmetrical conduction path |
| Cathode | Transient current entry (bidirectional) | Acts as anode during negative transients; identical electrical behavior to anode terminal |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature, eliminating parameter drift in automotive under-hood applications |
| 1500 W peak pulse power (10/1000 μs) | Meets Level 4 IEC 61000-4-5 surge immunity for AC mains inputs and telecom line interfaces |
| Response time ≤1 ns | Clamps transients before sensitive logic or analog circuits experience overvoltage damage |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising surges (e.g., ESD or inductive kickback), improving protection fidelity |
| UL 94 V-0 molding compound | Prevents flame propagation in safety-critical power supply enclosures and industrial control panels |
Applications
| Industrial Motor Drive DC Bus Protection | Telecom Line Card Surge Protection |
|---|---|
Use Scenario: Protecting IGBT gate drivers and bus voltage monitors from switching-induced transients in 400 V DC bus systems. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across DC bus rails to shunt inductive energy during IGBT turn-off. Use Value: Limits transient voltage to ≤482 V, preventing gate oxide rupture in 600 V-class IGBTs and maintaining system uptime in factory automation. |
Use Scenario: Safeguarding Ethernet PHY interfaces and line interface units (LIUs) against lightning-induced surges on T1/E1 trunk lines. IC Role / Device Role / Timing Role: Primary-level TVS placed at connector entry point to absorb >1 kV common-mode surges before signal conditioning circuitry. Use Value: Withstands 1500 W pulses without degradation, enabling compliance with GR-1089-CORE and ITU-T K.20 standards. |
| Automotive Body Control Module (BCM) Power Input | Renewable Energy Inverter DC Link Monitoring |
Use Scenario: Protecting 12 V power inputs in BCMs from load dump and jump-start transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Bidirectional suppressor mounted directly at fuse box input to clamp 120 V/200 ms transients. Use Value: VWM = 300 V provides ample margin above 12 V nominal, while 175 °C TJ(max) supports under-hood mounting near engine compartments. |
Use Scenario: Shielding isolated voltage sensors monitoring 600–1000 V DC links in solar inverters from grid-switching transients. IC Role / Device Role / Timing Role: High-VBR TVS placed across differential sensing inputs to prevent saturation of precision op-amps and ADC front-ends. Use Value: Tight VBR tolerance (±5.3%) ensures predictable clamping onset, preserving measurement accuracy during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ350CA | Same VWM (300 V), lower PPPM (400 W), DO-214AC package (smaller footprint, higher thermal resistance) | Suitable for space-constrained PCBs but requires parallel devices for 1500 W handling; not rated for 175 °C operation | Select when board area is critical and surge duty is infrequent; verify thermal margin with RθJA = 110 °C/W |
| ON Semiconductor 1.5SMC350CA | Identical VWM/VBR/VC specs, same 1500 W rating, but SMC (DO-214AB) package with higher RθJL (20 °C/W) | Better suited for reflow-soldered designs; less effective in lead-mounted high-power dissipation scenarios | Prefer for automated assembly lines; avoid in lead-soldered high-temperature ambient deployments |
Compared with 1.5KE350CA-E3/51, SMAJ350CA trades power handling and thermal robustness for compactness, while 1.5SMC350CA maintains equivalent electrical performance but shifts thermal management burden to PCB layout - making the original 1.5KE best for lead-mounted, high-reliability industrial surge suppression.
Availability
1.5KE350CA-E3/51 is available at Aetrix Electronics and suitable for industrial motor drives, telecom line cards, automotive body control modules, and renewable energy inverters requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE350CA-E3/51 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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The 1.5KE series was engineered specifically for high-energy transient suppression in power electronics, emphasizing rugged packaging, repeatable clamping, and extended temperature operation - targeting applications where failure is not an option.
FAQ
What is the clamping voltage of the 1.5KE350CA-E3/51 under full-rated surge conditions?
The 1.5KE350CA-E3/51 clamps to 482 V at its peak pulse current of 3.1 A (10/1000 μs waveform), as specified in Vishay Document #88301. This value represents the maximum voltage imposed on protected circuitry during a full 1500 W transient event - critical for validating voltage margins of downstream MOSFETs and controllers. The 1.5KE350CA-E3/51 achieves this with minimal overshoot due to its low incremental surge resistance.
Is the 1.5KE350CA-E3/51 RoHS compliant and qualified for automotive use?
Yes, the 1.5KE350CA-E3/51 carries the "E3" suffix, confirming RoHS compliance per EU Directive 2011/65/EU and JESD 201 Class 1A whisker resistance. However, it is commercial-grade only - AEC-Q101 qualification applies only to variants with "HE3" suffix (e.g., 1.5KE350CAHE3_B), which are not identical to the 1.5KE350CA-E3/51. The 1.5KE350CA-E3/51 remains suitable for non-automotive industrial and telecom applications.
How does the bidirectional nature of the 1.5KE350CA-E3/51 affect its placement in AC-coupled circuits?
The 1.5KE350CA-E3/51 has no polarity marking and conducts identically in both directions, making it ideal for protecting balanced or floating nodes - such as RS-485 differential pairs or transformer-coupled Ethernet interfaces. Unlike unidirectional TVS diodes, it eliminates orientation errors during assembly and ensures symmetrical clamping regardless of transient polarity. This behavior is intrinsic to the 1.5KE350CA-E3/51's internal structure and confirmed in Vishay's bidirectional test methodology.
What is the maximum operating temperature and thermal resistance of the 1.5KE350CA-E3/51?
The 1.5KE350CA-E3/51 has a maximum junction temperature (TJ) of 175 °C and a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W. These values enable reliable operation in high-ambient environments like power supply enclosures or outdoor telecom cabinets. Derating begins above TA = 25 °C per Figure 2 in Vishay Document #88301, and the 1.5KE350CA-E3/51 must be mounted with ≥0.375" (9.5 mm) lead length for rated 6.5 W dissipation.
Can the 1.5KE350CA-E3/51 be used in parallel to increase surge current handling?
Yes, the 1.5KE350CA-E3/51 may be paralleled to increase total peak pulse current capacity, provided matched VBR tolerances (±5.3%) and symmetrical PCB layout minimize current imbalance. Vishay explicitly states in Application Notes that TVS diodes in this family "can be used in series or parallel to increase the peak power ratings." However, derating of total power by ≥20% is recommended to account for parametric spread - a practice validated for the 1.5KE350CA-E3/51 in multi-device configurations.
1.5KE350CA-E3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 300V
- Voltage - Breakdown (Min):
- 333V
- Voltage - Clamping (Max) @ Ipp:
- 482V
- Current - Peak Pulse (10/1000µs):
- 3.1A
- 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
1.5KE350CA-E3/51 FAQ
1.How can I place an order for 1.5KE350CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE350CA-E3/51 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 1.5KE350CA-E3/51 reliable?
The price and inventory of 1.5KE350CA-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE350CA-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE350CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE350CA-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE350CA-E3/51?
1.5KE350CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE350CA-E3/51 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 1.5KE350CA-E3/51?
For technical support, including 1.5KE350CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE350CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE350CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE350CA-E3/51 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 1.5KE350CA-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE350CA-E3/51?
All 1.5KE350CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE350CA-E3/51, 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 1.5KE350CA-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE350CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE350CA-E3/51 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
