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Vishay General Semiconductor - Diodes Division 1.5KE24CHE3/73
- Part No.:
- 1.5KE24CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE24CHE3/73.pdf
- Description:
- TVS DIODE 19.4VWM 34.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,244
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Product details
Overview
1.5KE24CHE3/73 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 24 V breakdown voltage (VBR = 22.8–25.2 V at IT = 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 33.2 V at 45.2 A, and operates across –55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against inductive switching transients and ESD in industrial and automotive power supplies.
For engineers reviewing the 1.5KE24CHE3/73 datasheet, 1.5KE24CHE3/73 pinout, 1.5KE24CHE3/73 application, or 1.5KE24CHE3/73 equivalent, this part delivers verified transient suppression performance with RoHS-compliant matte tin-plated leads, JEDEC-standard 1.5KE package, and AEC-Q101 qualification (HE3 suffix variant), supporting robust design validation in high-reliability embedded systems.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast clamping response (<1 ns) and low incremental surge resistance. Its unidirectional polarity enables integration into DC-biased circuits where reverse conduction must be blocked until breakdown occurs.
The device meets UL 94 V-0 flammability requirements, supports solder dip up to 275 °C for 10 s, and exhibits a thermal resistance of RθJL = 15.4 °C/W (junction-to-lead), enabling effective heat dissipation in leaded PCB layouts without heatsinks under pulsed conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V at 1.0 mA - defines precise voltage threshold at which clamping initiates under standardized test current |
| VWM | 20.5 V - maximum continuous working voltage before leakage exceeds 1.0 µA, setting safe DC bias limit |
| VC @ IPPM | 33.2 V at 45.2 A - clamped voltage during 1500 W transient, directly limiting stress on downstream components |
| PPPM | 1500 W (10/1000 µs waveform) - peak surge energy handling capacity for lightning or inductive kick events |
| IFSM | 200 A (8.3 ms half-sine) - surge current rating for unidirectional forward conduction during rare fault conditions |
| Junction Temp Range | –55 °C to +175 °C - enables operation in under-hood automotive or industrial environments without derating |
| Leakage @ VWM | 1.0 µA max - ensures negligible standby power loss and minimal interference in high-impedance sensing paths |
Pinout & Package
Package: JEDEC-standard Case Style 1.5KE - molded epoxy body with matte tin-plated axial leads, UL 94 V-0 rated, 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) body diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of protected circuit; conducts only during forward surge events |
| Cathode | Reverse-biased terminal (marked with color band) | Connected to higher-potential rail; blocks normal operation but avalanches at VBR to shunt transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power | Handles severe transients such as ISO 7637-2 Pulse 5a (load dump) without degradation in automotive 12 V systems |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47 |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected MOSFETs |
| RoHS-compliant & whisker-tested | E3 suffix meets JESD201 Class 1A; HE3 meets Class 2 - eliminates field failures due to tin whisker growth in high-reliability assemblies |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Primary clamping element placed between battery rail and input filter capacitor, responding within <1 ns to suppress >100 V spikes. Use Value: Limits voltage seen by downstream DC/DC converters and microcontrollers to ≤33.2 V, preventing catastrophic failure during alternator disconnection events. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output line and ground, blocking reverse leakage while clamping positive transients. Use Value: Maintains signal integrity below 20.5 V operating range while suppressing ±8 kV contact ESD per IEC 61000-4-2 without affecting 4–20 mA loop accuracy. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding Ethernet PHY power inputs against lightning-induced surges on PoE-enabled infrastructure equipment. IC Role / Device Role / Timing Role: Front-end TVS on 48 V DC input, coordinated with MOVs and gas discharge tubes in multi-stage protection architecture. Use Value: Absorbs first 1500 W of surge energy with sub-34 V clamping, allowing secondary protection to handle residual energy and extend system MTBF. |
Use Scenario: Overvoltage protection on AC/DC adapter primary-side rectified bus (e.g., after bridge rectifier, before bulk capacitor). IC Role / Device Role / Timing Role: Unidirectional clamp referenced to ground, triggered by line-voltage spikes or transformer ringing. Use Value: Prevents bulk capacitor overvoltage and controller IC latch-up during brownout recovery or mains transients, meeting UL 1449 Type 2 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | DO-214AA package (SMB), 600 W PPPM, VC = 38.9 V @ 15.4 A, lower surge current rating | Surface-mount layout; suited for space-constrained consumer electronics, not axial-leaded industrial modules | Select SMBJ24A when board real estate is limited and peak surge energy is ≤600 W; verify thermal relief for sustained duty cycles. |
| 1.5KE24A-E3/54 | Same 1.5KE package and electrical specs, but commercial-grade (non-AEC-Q101), E3 suffix only (no HE3 qualification) | Acceptable for non-automotive industrial or telecom use where extended temperature validation and automotive qualification are not required | Choose 1.5KE24A-E3/54 for cost-sensitive designs outside automotive OEM or Tier 1 supply chains; no change in footprint or schematic. |
Compared with 1.5KE24CHE3/73, SMBJ24A offers smaller size but reduced surge capability and no AEC-Q101 validation, while 1.5KE24A-E3/54 matches form/fit/function but lacks automotive qualification-making the HE3/73 variant essential for validated reliability in harsh environments.
Availability
1.5KE24CHE3/73 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface protection, and telecom line card surge suppression requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1.5KE24CHE3/73 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5KE series was engineered for high-energy transient suppression in demanding DC power and signal line applications, targeting automotive, industrial, and telecommunications markets where robustness and long-term stability are critical.
FAQ
What is the breakdown voltage tolerance for 1.5KE24CHE3/73?
The 1.5KE24CHE3/73 has a specified breakdown voltage range of 22.8 V to 25.2 V at a test current of 1.0 mA, corresponding to a ±5% tolerance around the nominal 24 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports reliable coordination with downstream overvoltage protection thresholds in systems using the 1.5KE24CHE3/73.
Is 1.5KE24CHE3/73 suitable for bidirectional transient protection?
No, 1.5KE24CHE3/73 is a unidirectional TVS diode, indicated by the "A" suffix (not "CA"). It conducts only in reverse breakdown and blocks forward current beyond its low forward voltage (~3.5 V at 100 A). For bidirectional protection, Vishay offers variants like 1.5KE24CAHE3/73; using 1.5KE24CHE3/73 in AC-coupled or floating applications would leave positive transients unprotected.
What does the "HE3/73" suffix mean in 1.5KE24CHE3/73?
The "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance; "73" is Vishay's internal packaging code indicating 7-inch reel, 1400 units per reel, in 13" diameter paper tape. This distinguishes it from commercial-grade E3 variants and confirms compliance with automotive reliability standards required for deployment in 1.5KE24CHE3/73-based designs.
How does the clamping voltage of 1.5KE24CHE3/73 compare to its breakdown voltage?
The 1.5KE24CHE3/73 clamps at 33.2 V when subjected to its maximum rated peak pulse current of 45.2 A (10/1000 µs waveform), resulting in a clamping ratio (VC/VBR) of approximately 1.46. This low ratio reflects efficient energy diversion and ensures protected devices experience minimal overvoltage margin above the 24 V nominal rating-critical for safeguarding 24 V-rated ICs and MOSFETs in systems using the 1.5KE24CHE3/73.
Can 1.5KE24CHE3/73 be used in parallel for higher surge capacity?
While TVS diodes like the 1.5KE24CHE3/73 can be paralleled to increase total peak pulse power, mismatched VBR tolerances may cause uneven current sharing and premature failure of one device. Vishay recommends using a single 1.5KE24CHE3/73 for up to 1500 W or selecting a higher-rated part (e.g., 3.0KE24A) instead of paralleling-unless matched units with binning data and derated layout are employed in the 1.5KE24CHE3/73 implementation.
1.5KE24CHE3/73 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE24CHE3/73 FAQ
1.How can I place an order for 1.5KE24CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE24CHE3/73 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 1.5KE24CHE3/73 reliable?
The price and inventory of 1.5KE24CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE24CHE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE24CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE24CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE24CHE3/73?
1.5KE24CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE24CHE3/73 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 1.5KE24CHE3/73?
For technical support, including 1.5KE24CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE24CHE3/73 requirements.
6.How does Aetrix verify that 1.5KE24CHE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE24CHE3/73 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 1.5KE24CHE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE24CHE3/73?
All 1.5KE24CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE24CHE3/73, 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 1.5KE24CHE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE24CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE24CHE3/73 Tags
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