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Vishay General Semiconductor - Diodes Division 1.5KE24-E3/73
- Part No.:
- 1.5KE24-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE24-E3/73.pdf
- Description:
- TVS DIODE 19.4VWM 34.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,739
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Product details
Overview
1.5KE24-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 24 V breakdown voltage (VBR = 22.8–25.2 V at 1 mA), 20.5 V maximum working voltage (VWM), 33.2 V clamping voltage (VC) at 45.2 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates from –55 °C to +175 °C junction temperature - deployed in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1.5KE24-E3/73 datasheet, 1.5KE24-E3/73 pinout, 1.5KE24-E3/73 application, or 1.5KE24-E3/73 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping performance under surge conditions, thermal derating guidance, and validated alternative parts for ESD/lightning transient suppression in high-reliability embedded systems.
Technical Context
The 1.5KE24-E3/73 uses a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its unidirectional polarity enables cathode-grounded placement on positive-rail protection paths, with a 3.5 V forward voltage (VF) at 100 A surge current and 200 A non-repetitive IFSM rating.
It complies with JEDEC DO-201AD mechanical standards and supports RoHS-compliant commercial-grade operation (E3 suffix). The device is not AEC-Q101 qualified - only HE3-suffix variants (e.g., 1.5KE24AHE3_B) meet automotive qualification requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V at 1 mA - defines precise voltage threshold where clamping initiates |
| VWM | 20.5 V - maximum continuous DC or RMS voltage the device blocks without leakage |
| VC @ IPPM | 33.2 V at 45.2 A - peak clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPPM | 1500 W - peak transient power absorption capability per single 1 ms pulse |
| IFSM | 200 A - withstands 8.3 ms half-sine surge without failure, critical for inductive switch-off events |
| TJ max | +175 °C - enables operation in under-hood automotive or high-ambient industrial environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, informs heatsinking needs for repetitive surges |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with matte tin-plated leads. Dimensions: 5.3 mm diameter × 9.5 mm length; lead spacing 7.2 mm; weight 0.968 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive-side connection in unidirectional configuration | Connected to protected line (e.g., +12 V rail); current flows anode-to-cathode during forward conduction |
| Cathode | Ground-reference terminal with color band marking | Connected to system ground; reverse-biased during normal operation; conducts during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| 1500 W peak pulse power (10/1000 µs) | Protects against ISO 7637-2 Pulse 1/2a/5a transients and IEC 61000-4-5 Level 3 surges |
| Clamping ratio (VC/VBR) ≈ 1.46 | Minimizes overvoltage margin while maintaining robust surge margin - balances protection and component stress |
| Response time < 1 ns | Engages before sensitive ICs experience damaging voltage overshoot during ESD or lightning-induced spikes |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance and J-STD-002 solderability standards |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role: Primary shunt TVS placed between battery rail and ground, upstream of DC/DC converters. Use Value: Clamps transients to ≤33.2 V, preventing damage to 36 V-rated input stages of PMICs and microcontrollers. | Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) of pressure sensors exposed to field wiring surges. IC Role / Device Role: Unidirectional TVS connected across output and return, referenced to local ground. Use Value: Limits induced voltage to <33.2 V during 1 kV/500 A IEC 61000-4-5 coupling events, preserving ADC front-end integrity. |
| Consumer Power Adapter Output Protection | Telecom DSL Line Interface Protection |
Use Scenario: Secondary-side overvoltage suppression on 24 V SMPS outputs powering routers or PoE injectors. IC Role / Device Role: Standoff-rated TVS absorbing flyback spikes and external surge coupling via shared ground planes. Use Value: Maintains VWM = 20.5 V margin above nominal 24 V, enabling reliable hold-up during brownouts while blocking false triggering. | Use Scenario: Protecting ADSL line drivers from lightning-induced common-mode surges on twisted-pair copper lines. IC Role / Device Role: Paired unidirectional 1.5KE24-E3/73 devices (one per line) referenced to telecom ground. Use Value: Delivers sub-35 V clamping within 1 ns, meeting GR-1089-CORE Level 3 surge immunity without adding series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ24A | DO-214AC (SMA) package; lower PPPM = 400 W; VC = 38.9 V @ 10.3 A | Suitable for space-constrained PCBs but requires parallel devices for 1500 W-level surge handling | Select when board area is limited and surge energy is ≤400 W; verify layout thermal relief for repeated events |
| ON Semiconductor 1.5SMC24A | DO-214AB (SMC) package; identical PPPM = 1500 W; VC = 35.5 V @ 42.3 A; higher VBR tolerance (5%) vs. Vishay's (5.3%) | Direct drop-in replacement in SMC footprint; slightly higher clamping increases downstream voltage stress | Choose for SMC-compatible designs needing same power rating; confirm 35.5 V clamp meets system OV threshold |
Compared with 1.5KE24-E3/73, SMAJ24A offers smaller size but reduced surge capacity, while 1.5SMC24A matches power rating in a surface-mount package with marginally higher clamping - both require footprint redesign and revalidation of thermal and electrical margins.
Availability
1.5KE24-E3/73 is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial sensor interfaces, consumer power adapter outputs, and telecom line driver protection requiring stable component supply and traceable sourcing.
Supply support for 1.5KE24-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 and ruggedness.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and wide temperature operation are mandatory.
FAQ
What is the breakdown voltage range of the 1.5KE24-E3/73?
The 1.5KE24-E3/73 has a guaranteed breakdown voltage (VBR) range of 22.8 V to 25.2 V at a test current of 1 mA, measured per JEDEC standard. This tight 5.3% tolerance ensures predictable clamping onset across production lots and temperature extremes, making the 1.5KE24-E3/73 suitable for precision overvoltage protection where margin control is critical.
Is the 1.5KE24-E3/73 AEC-Q101 qualified?
No, the 1.5KE24-E3/73 is a commercial-grade part with RoHS-compliant E3 suffix. AEC-Q101 qualification applies only to HE3-suffix variants such as 1.5KE24AHE3_B. For automotive applications requiring AEC-Q101 compliance, engineers must specify the HE3 version - the 1.5KE24-E3/73 itself does not carry that qualification and should not be used in safety-critical vehicle subsystems without additional validation.
What is the clamping voltage of the 1.5KE24-E3/73 under surge conditions?
The 1.5KE24-E3/73 clamps to a maximum of 33.2 V when subjected to its rated peak pulse current of 45.2 A (10/1000 µs waveform). This VC value is measured at the device terminals and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events - a key parameter used to verify compatibility with downstream IC absolute maximum ratings.
Can the 1.5KE24-E3/73 be used in bidirectional configurations?
No, the 1.5KE24-E3/73 is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional variants use the "CA" suffix (e.g., 1.5KE24CA). Using the 1.5KE24-E3/73 in AC or floating-line applications would result in forward conduction during negative half-cycles - potentially causing failure. Always match polarity: select 1.5KE24CA for bidirectional protection needs.
What is the maximum operating temperature for the 1.5KE24-E3/73?
The 1.5KE24-E3/73 has a maximum junction temperature (TJ) rating of +175 °C and a storage temperature range of –55 °C to +175 °C. This wide thermal envelope allows deployment in under-hood automotive locations, industrial motor drives, and outdoor telecom enclosures - provided PCB layout provides adequate thermal relief and power derating curves (Fig. 5 in datasheet 88301) are followed for elevated ambient conditions.
1.5KE24-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 19.4V
- Voltage - Breakdown (Min):
- 21.6V
- Voltage - Clamping (Max) @ Ipp:
- 34.7V
- Current - Peak Pulse (10/1000µs):
- 43.2A
- 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
1.5KE24-E3/73 FAQ
1.How can I place an order for 1.5KE24-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE24-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 1.5KE24-E3/73 reliable?
The price and inventory of 1.5KE24-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 1.5KE24-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE24-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE24-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE24-E3/73?
1.5KE24-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE24-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 1.5KE24-E3/73?
For technical support, including 1.5KE24-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE24-E3/73 requirements.
6.How does Aetrix verify that 1.5KE24-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE24-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 1.5KE24-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE24-E3/73?
All 1.5KE24-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE24-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 1.5KE24-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE24-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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