My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE30A-E3/73
- Part No.:
- 1.5KE30A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE30A-E3/73.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:912
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE30A-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 30 V breakdown voltage (VBR = 28.5–31.5 V at 1.0 mA), 25.6 V maximum working voltage (VWM), 41.4 V clamping voltage (VC) at 36.2 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in industrial power supplies and automotive ECUs.
For engineers reviewing the 1.5KE30A-E3/73 datasheet, 1.5KE30A-E3/73 pinout, 1.5KE30A-E3/73 application, or 1.5KE30A-E3/73 equivalent, this part delivers verified unidirectional clamping performance, RoHS-compliant matte tin-plated leads, JEDEC-standard 1.5KE package, and AEC-Q101 qualification eligibility (via HE3 suffix variants), supporting robust surge immunity design in high-reliability embedded systems.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds its breakdown threshold, it avalanches into low-impedance conduction to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping under repetitive 10/1000 µs pulses at 0.01% duty cycle.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15.4 °C/W, with maximum junction temperature of +175 °C and operating range from –55 °C to +175 °C. It exhibits instantaneous response time <1 ns and forward voltage ≤3.5 V at 100 A, confirming suitability for fast, high-energy transient suppression without forward conduction interference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 28.5 V / 31.5 V at 1.0 mA - defines precise avalanche initiation window for reliable overvoltage detection |
| VWM | 25.6 V - maximum continuous DC or RMS voltage the device blocks without leakage exceeding 1.0 µA |
| VC @ IPPM | 41.4 V at 36.2 A - clamping voltage during 1500 W transient, limiting protected circuit stress to safe margin |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, enabling lightning and ESD surge compliance |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), supporting high-energy fault clearing |
| TJ max. | +175 °C - extended thermal capability for under-hood automotive or high-ambient industrial use |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - axial-leaded, epoxy-molded, UL 94 V-0 rated package with 0.375" lead length |
Pinout & Package
1.5KE30A-E3/73 uses the standard axial-leaded DO-201AD package (Case Style 1.5KE), with cathode identified by a color band on one end. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and qualified to JESD 201 Class 1A whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential side of protected line; enables unidirectional clamping to ground |
| Cathode | Current exit terminal in forward bias; avalanche node in reverse bias | Marked with color band; tied to higher-potential rail or signal line to be protected |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures ±5% VBR tolerance and long-term stability under thermal cycling and humidity |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity without derating in typical PCB layouts |
| Clamping ratio VC/VBR ≈ 1.42 | Minimizes overvoltage overshoot during transients, reducing risk of latch-up or gate oxide damage in MOSFETs |
| Response time < 1 ns | Outperforms MOVs and GDTs in speed, enabling protection of high-speed digital interfaces and precision analog circuits |
| RoHS-compliant, JESD 201 Class 1A | Meets global environmental requirements and mitigates tin whisker risk in high-reliability solder joints |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 24 V DC input stage of programmable logic controllers (PLCs) against load dump and inductive switching spikes. IC Role / Device Role: Unidirectional shunt TVS placed between VIN and GND, clamping surges before they reach DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤41.4 V, preventing damage to 36 V-rated input capacitors and 5 V LDO regulators downstream. |
Use Scenario: Safeguarding LIN bus transceivers and relay driver outputs in BCMs exposed to battery voltage transients. IC Role / Device Role: Primary overvoltage clamp on 12 V supply rail and signal lines, coordinated with secondary filtering. Use Value: Withstands 200 A surge (8.3 ms) and clamps within 1 ns, ensuring uninterrupted communication during cold-crank or jump-start events. |
| Telecom Remote Terminal Unit (RTU) | Consumer Appliance Motor Drive Board |
Use Scenario: Shielding RS-485 interface ICs and microcontroller I/O pins in outdoor RTUs subjected to induced lightning surges on long cable runs. IC Role / Device Role: First-line transient suppressor on power and data lines, upstream of TVS arrays and common-mode chokes. Use Value: 1500 W rating handles REA P.E. 60-compliant surges; low VC/VBR ratio preserves signal integrity across 1 Mbps differential links. |
Use Scenario: Protecting gate drivers and bootstrap circuits in BLDC motor inverters inside washing machines and HVAC systems. IC Role / Device Role: Unidirectional TVS on high-side gate drive supply (VB) and low-side source return path. Use Value: Clamps inductive kickback from motor windings below 45 V, preventing shoot-through and MOSFET avalanche failure during commutation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A | DO-214AA package (SMB), 600 W PPPM, VC = 48.4 V @ 12.3 A - lower power, smaller footprint | Preferred for space-constrained PCBs where 600 W suffices; not suitable for 1500 W IEC 61000-4-5 Level 4 | Select SMBJ30A only if layout area is critical and surge energy is limited to ≤600 W; verify thermal relief for sustained surges. |
| 1.5KE30CA | Bidirectional variant, same VBR and PPPM, but symmetrical clamping (VC = 45.7 V @ 32.8 A); no polarity marking | Required for AC-coupled or floating signal lines (e.g., Ethernet PHY, audio inputs) where polarity reversal may occur | Choose 1.5KE30CA only when protecting bidirectional signals or AC rails; unidirectional 1.5KE30A-E3/73 is optimal for DC power rails with defined ground reference. |
Compared with SMBJ30A and 1.5KE30CA, the 1.5KE30A-E3/73 provides the highest surge energy handling (1500 W) in an axial package ideal for through-hole mounting and high-current grounding paths, making it the preferred choice for industrial and automotive primary protection where mechanical robustness and thermal mass matter.
Availability
1.5KE30A-E3/73 is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronic control units, telecom remote terminals, and consumer appliance motor drives requiring stable component supply and long-term obsolescence management.
Supply support for 1.5KE30A-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against lightning, load dump, and ESD is mission-critical.
FAQ
What is the breakdown voltage tolerance of the 1.5KE30A-E3/73?
The 1.5KE30A-E3/73 has a specified breakdown voltage range of 28.5 V to 31.5 V at 1.0 mA test current, corresponding to a ±5% tolerance around the nominal 30 V rating. This tight tolerance ensures predictable clamping behavior across production lots and temperature extremes, critical for maintaining safety margins in regulated power systems.
Is the 1.5KE30A-E3/73 RoHS compliant and lead-free?
Yes, the 1.5KE30A-E3/73 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and exemption 6a, with matte tin-plated leads and no lead content in solderable terminations. It also meets JESD 201 Class 1A whisker testing requirements for high-reliability solder joints.
Can the 1.5KE30A-E3/73 be used in automotive applications?
The 1.5KE30A-E3/73 itself is commercial-grade, but its HE3-suffix variants (e.g., 1.5KE30AHE3_B) are AEC-Q101 qualified for automotive use. For under-hood or body-control applications requiring qualification, specify the HE3 version; the 1.5KE30A-E3/73 remains suitable for non-qualified automotive subsystems where thermal and surge specs meet design needs.
What is the maximum clamping voltage of the 1.5KE30A-E3/73 under surge conditions?
The 1.5KE30A-E3/73 clamps to a maximum of 41.4 V at its rated peak pulse current of 36.2 A (10/1000 µs waveform). This value is guaranteed per datasheet Table on page 2 and represents the worst-case voltage seen by protected circuitry during a full 1500 W transient event.
How does the 1.5KE30A-E3/73 compare to MOV-based protection?
Unlike metal-oxide varistors, the 1.5KE30A-E3/73 offers sub-nanosecond response time, no degradation after repeated surges, tighter voltage tolerance (±5% vs. ±10–20%), and no capacitance-related signal distortion. It is preferred for protecting sensitive ICs and high-speed interfaces where MOVs introduce leakage, aging, or parasitic effects.
1.5KE30A-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 36.2A
- 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
1.5KE30A-E3/73 FAQ
1.How can I place an order for 1.5KE30A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE30A-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 1.5KE30A-E3/73 reliable?
The price and inventory of 1.5KE30A-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 1.5KE30A-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE30A-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE30A-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE30A-E3/73?
1.5KE30A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE30A-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 1.5KE30A-E3/73?
For technical support, including 1.5KE30A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE30A-E3/73 requirements.
6.How does Aetrix verify that 1.5KE30A-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE30A-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 1.5KE30A-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE30A-E3/73?
All 1.5KE30A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE30A-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 1.5KE30A-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE30A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE30A-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 …
