My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE400A-E3/73
- Part No.:
- 1.5KE400A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE400A-E3/73.pdf
- Description:
- TVS DIODE 342VWM 548VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,522
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE400A-E3/73 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 380 V to 420 V breakdown voltage (VBR), 342 V maximum standoff voltage (VWM), 548 V clamping voltage at peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates across -55 °C to +175 °C junction temperature. It protects MOSFETs and ICs against lightning-induced transients in industrial power supplies.
For engineers reviewing the 1.5KE400A-E3/73 datasheet, 1.5KE400A-E3/73 pinout, 1.5KE400A-E3/73 application, or 1.5KE400A-E3/73 equivalent, key selection criteria include clamping voltage margin vs. protected device's absolute maximum rating, thermal derating above 25 °C ambient, unidirectional polarity confirmation via cathode band marking, and compatibility with JEDEC 1.5KE package soldering profiles (275 °C, 10 s max).
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs waveform test condition, with peak pulse current (IPPM) of 2.7 A and clamping voltage (VC) of 548 V under that stress.
Thermal performance is characterized by RθJA = 75 °C/W and RθJL = 15.4 °C/W, enabling reliable operation up to TJ = 175 °C. The device exhibits a VF = 5.0 V at 100 A forward surge, consistent with the 1.5KE250A–540A series specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 380 V / 420 V - Ensures reliable conduction onset above normal operating voltage while avoiding false triggering |
| VWM | 342 V - Maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 548 V - Clamped voltage during 1500 W transient limits stress on downstream components |
| IPPM | 2.7 A - Peak pulse current supported under 10/1000 µs waveform without failure |
| PPPM | 1500 W - Single-pulse surge energy handling capacity per IEEE C62.35 standard |
| TJ range | -55 °C to +175 °C - Enables deployment in under-hood automotive and industrial environments |
| Package | JEDEC DO-201AD (1.5KE) - Standard axial-leaded through-hole package with 9.5 mm lead length |
Pinout & Package
1.5KE400A-E3/73 uses the JEDEC-standard DO-201AD (Case Style 1.5KE) axial-leaded package. The cathode is marked by a color band on one end; the opposite end is anode. Leads are matte tin-plated and compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point in forward bias; connected to system ground or low-side reference | Must be tied to lowest potential node in protected circuit to enable proper clamping path |
| Cathode (banded end) | Current exit point in forward bias; connected to line being protected | Reverse-biased during normal operation; conducts only when line voltage exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| 1500 W peak pulse power (10/1000 µs) | Handles high-energy surges common in AC mains, motor drives, and telecom line interfaces |
| Clamping voltage ≤ 548 V at 2.7 A | Provides ≥15% margin below typical 600 V MOSFET drain-source breakdown ratings |
| Response time < 1 ns | Acts before induced transients can damage sensitive gate oxides or logic inputs |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance and UL 94 V-0 flammability requirements |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protects DC-DC converter input stages from load dump and alternator ripple transients in 24 V systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp positive-going spikes. Use Value: Limits transient voltage to 548 V, safeguarding 600 V-rated MOSFETs and reducing need for oversized input capacitors. |
Use Scenario: Shields LIN bus transceivers and microcontroller I/O pins from ESD and switching noise in door modules. IC Role / Device Role / Timing Role: Standoff voltage (342 V) ensures no conduction during normal 12 V operation; clamps sub-µs ESD events. Use Value: Sub-1 ns response prevents latch-up in 3.3 V/5 V logic, meeting ISO 10605 Level 4 (30 kV air discharge) requirements. |
| Telecom Line Interface | Renewable Energy Inverter DC Link |
Use Scenario: Guards RS-485 transceivers on outdoor base station backhaul links exposed to induced lightning surges. IC Role / Device Role / Timing Role: Connected across differential pair (A–B) and ground to suppress common-mode transients. Use Value: 1500 W rating handles multi-kA induced currents per ITU-T K.20/K.21 guidelines without degradation. |
Use Scenario: Installed across PV string inputs of solar inverters to absorb switching transients from contactor bounce and MPPT ripple. IC Role / Device Role / Timing Role: Unidirectional placement from DC+ to ground absorbs positive polarity surges generated by rapid current interruption. Use Value: 175 °C max junction temperature supports operation in sealed, high-ambient enclosures without forced cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ400A | DO-214AC (SMA) package; lower PPPM = 400 W; VC = 592 V at 2.1 A | Suitable for space-constrained PCBs but requires parallel devices for 1500 W capability | Select when board area is critical and surge duty cycle is low; verify thermal dissipation in SMA footprint |
| ON Semiconductor 1.5SMC400A | DO-214AB (SMC) package; same PPPM = 1500 W; VC = 574 V at 2.6 A; higher VF = 5.5 V | Better suited for surface-mount assembly; slightly higher clamping increases stress on protected devices | Choose for automated SMT production; confirm layout accommodates 7.1 mm x 6.2 mm SMC body and thermal relief |
Compared with 1.5KE400A-E3/73, the SMAJ400A trades surge capacity for compactness, while the 1.5SMC400A maintains power rating but raises clamping voltage by 26 V-requiring tighter margin analysis against downstream component ratings.
Availability
1.5KE400A-E3/73 is available at Aetrix Electronics and suitable for industrial power supplies, automotive BCMs, telecom line interfaces, and renewable energy inverters requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1.5KE400A-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, power handling, and automotive qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting applications where robustness, repeatable clamping, and wide temperature operation are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5KE400A-E3/73?
The 1.5KE400A-E3/73 has a specified breakdown voltage (VBR) range of 380 V minimum to 420 V maximum at 1.0 mA test current. This ±5% tolerance ensures predictable turn-on behavior across production lots while maintaining sufficient margin above its 342 V standoff voltage to prevent nuisance conduction during normal operation.
Is 1.5KE400A-E3/73 RoHS compliant and qualified for automotive use?
Yes, the 1.5KE400A-E3/73 carries the E3 suffix, indicating 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 HE3-suffix variants (e.g., 1.5KE400AHE3_B), not the E3/73 version.
How does the clamping voltage of 1.5KE400A-E3/73 compare to its breakdown voltage?
The 1.5KE400A-E3/73 clamps at 548 V under 10/1000 µs surge conditions, which is approximately 30% above its nominal 400 V breakdown rating. This overvoltage margin reflects the device's incremental resistance during high-current conduction and must be verified against the absolute maximum voltage rating of the protected IC or MOSFET.
Can 1.5KE400A-E3/73 be used in bidirectional configurations?
No-1.5KE400A-E3/73 is strictly unidirectional. Bidirectional variants in the 1.5KE family are designated with a "CA" suffix (e.g., 1.5KE220CA) and are only available up to 220 V VBR. For 400 V bidirectional protection, alternate families such as SMAJ400CA or custom solutions must be considered.
What is the maximum allowable lead temperature during soldering for 1.5KE400A-E3/73?
The 1.5KE400A-E3/73 supports solder dip at 275 °C maximum for 10 seconds, per JESD 22-B106. Reflow profiles must comply with JEDEC J-STD-020 moisture sensitivity level (MSL) requirements; though not moisture-sensitive, thermal shock from excessive dwell time or ramp rates may compromise the glass passivation layer.
1.5KE400A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 342V
- Voltage - Breakdown (Min):
- 380V
- Voltage - Clamping (Max) @ Ipp:
- 548V
- Current - Peak Pulse (10/1000µs):
- 2.7A
- 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
1.5KE400A-E3/73 FAQ
1.How can I place an order for 1.5KE400A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE400A-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 1.5KE400A-E3/73 reliable?
The price and inventory of 1.5KE400A-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 1.5KE400A-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE400A-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE400A-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE400A-E3/73?
1.5KE400A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE400A-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 1.5KE400A-E3/73?
For technical support, including 1.5KE400A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE400A-E3/73 requirements.
6.How does Aetrix verify that 1.5KE400A-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE400A-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 1.5KE400A-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE400A-E3/73?
All 1.5KE400A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE400A-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 1.5KE400A-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE400A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE400A-E3/73 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 …
