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Vishay General Semiconductor - Diodes Division 1.5KE51CHE3/73
- Part No.:
- 1.5KE51CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE51CHE3/73.pdf
- Description:
- TVS DIODE 41.3VWM 73.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,303
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Product details
Overview
1.5KE51CHE3/73 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 51 V breakdown voltage (VBR = 48.5–53.6 V at 1 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 70.1 V at 21.4 A, 6.5 W steady-state power dissipation, and operates from –55 °C to +175 °C junction temperature.
For engineers reviewing the 1.5KE51CHE3/73 datasheet, 1.5KE51CHE3/73 pinout, 1.5KE51CHE3/73 application, or 1.5KE51CHE3/73 equivalent, this device is selected for robust surge immunity in automotive power supplies, industrial sensor interfaces, and telecom line protection where fast clamping (<1 ns), low incremental surge resistance, and AEC-Q101 qualification (HE3 suffix) are critical.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for high-energy transient suppression. Its unidirectional polarity enables cathode-referenced clamping on positive-going surges, with a maximum reverse standoff voltage (VWM) of 43.6 V and leakage current ≤1.0 µA at that voltage.
The device delivers 21.4 A peak pulse current (IPPM) under 10/1000 µs waveform, clamping to 70.1 V - a 37 % overvoltage margin above VWM. Thermal resistance is 15.4 °C/W (junction-to-lead), supporting reliable operation up to 175 °C junction temperature without heatsinking in moderate-duty applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - defines precise clamping onset threshold for design margining |
| VWM | 43.6 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 70.1 V at 21.4 A - actual clamped voltage during 1500 W transient, limiting downstream stress |
| PPPM | 1500 W - peak surge power handling capability per 10/1000 µs standard waveform |
| TJ max. | +175 °C - enables use in under-hood automotive and high-temperature industrial environments |
| RθJL | 15.4 °C/W - low thermal resistance allows direct PCB trace conduction for heat dissipation |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package, 0.375" lead length, RoHS-compliant matte tin plating |
Pinout & Package
1.5KE51CHE3/73 is housed in a DO-201AD (Case Style 1.5KE) axial-leaded package with cathode indicated by a color band. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102. The package meets UL 94 V-0 flammability rating and supports solder dip at 275 °C for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; forms clamping path during positive transients |
| Cathode | High-side surge input terminal | Connected to protected line; conducts when voltage exceeds VBR, shunting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5 %) and long-term reliability under repeated surge stress |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges on 50 Ω source impedance without degradation |
| AEC-Q101 qualified (HE3) | Validated for automotive powertrain and body electronics per stress test requirements including HTGB, HTRB, and TCT |
| Clamping response time <1 ns | Protects sensitive ICs (e.g., CAN transceivers, microcontrollers) before damage thresholds are exceeded |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, inductive kickback) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary clamping element placed between power input and upstream fuse, conducting surges to chassis ground within nanoseconds. Use Value: Limits voltage to ≤70.1 V during 1500 W transients, preventing latch-up or gate oxide rupture in MCU and PMIC components. | Use Scenario: Shielding 4–20 mA current loop inputs in PLC analog modules from field-induced lightning surges. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-signal line, absorbing positive polarity transients only. Use Value: Maintains signal integrity with <1.0 µA leakage at 43.6 V, ensuring minimal offset error in precision current measurement circuits. |
| Telecom Line Surge Protection | DC-DC Converter Input Stage |
Use Scenario: Safeguarding PoE-powered Ethernet ports against induced surges on twisted-pair cables per IEC 61000-4-5. IC Role / Device Role / Timing Role: Front-end TVS on PSE side, placed before DC-DC isolation stage to clamp common-mode transients. Use Value: Fast sub-nanosecond response prevents propagation of high-dV/dt events into isolated secondary-side circuitry. | Use Scenario: Protecting buck converter input capacitors and MOSFETs from voltage spikes caused by hot-plug events or cable inductance. IC Role / Device Role / Timing Role: Clamp diode across input terminals, activated only when input voltage exceeds 43.6 V, diverting energy to ground. Use Value: Enables use of lower-voltage-rated input capacitors (e.g., 50 V instead of 63 V), reducing BOM cost and footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A | DO-214AA package (SMB), 600 W PPPM, same VBR range (48.5–53.6 V), higher leakage (5 µA at VWM) | Surface-mount alternative for space-constrained designs; lower surge rating limits use to Level 3 IEC 61000-4-5 | Select SMBJ51A when board real estate is limited and peak surge energy does not exceed 600 W. |
| 1.5KE51A-E3/54 | Same DO-201AD package and electrical specs, but commercial-grade (non-AEC-Q101), E3 suffix only (no HE3) | Approved for industrial/commercial use only; not validated for automotive temperature cycling or humidity testing | Choose 1.5KE51A-E3/54 for cost-sensitive non-automotive applications where AEC-Q101 is not required. |
Compared with 1.5KE51CHE3/73, SMBJ51A trades surge capacity and mounting method for compactness, while 1.5KE51A-E3/54 retains identical form and function but omits automotive qualification - making the HE3 variant essential for Tier 1 automotive supply chain compliance.
Availability
1.5KE51CHE3/73 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor conditioning, and telecom infrastructure requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for 1.5KE51CHE3/73 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 family was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated.
FAQ
What is the breakdown voltage tolerance for 1.5KE51CHE3/73?
The 1.5KE51CHE3/73 has a specified breakdown voltage (VBR) range of 48.5 V to 53.6 V at 1 mA test current, representing a ±5 % tolerance around the nominal 51 V rating. This tight tolerance ensures predictable clamping behavior across production lots and supports accurate system-level overvoltage margin analysis in designs using the 1.5KE51CHE3/73.
Is 1.5KE51CHE3/73 suitable for bidirectional surge protection?
No, 1.5KE51CHE3/73 is a unidirectional TVS diode - it clamps only positive-going transients relative to its cathode. For bidirectional protection, Vishay offers variants with "CA" suffix (e.g., 1.5KE51CA), which have symmetrical clamping in both polarities. Using 1.5KE51CHE3/73 in bidirectional applications would leave negative transients unprotected and may cause forward conduction damage.
What does the "HE3" suffix indicate in 1.5KE51CHE3/73?
The "HE3" suffix in 1.5KE51CHE3/73 denotes RoHS-compliant construction plus AEC-Q101 qualification, including stress testing for high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). This makes the 1.5KE51CHE3/73 acceptable for automotive powertrain and body electronics, unlike standard E3-suffix parts.
Can 1.5KE51CHE3/73 be used in parallel to increase surge current handling?
While multiple 1.5KE51CHE3/73 units can be paralleled, mismatched VBR tolerances (±5 %) may cause uneven current sharing and premature failure of one device. For higher surge ratings, Vishay recommends selecting a single higher-power TVS (e.g., 3KP51A) rather than paralleling 1.5KE51CHE3/73 units unless matched-bin devices and current-sharing resistors are employed.
What is the maximum allowable lead temperature during soldering for 1.5KE51CHE3/73?
The 1.5KE51CHE3/73 supports solder dip at a maximum temperature of 275 °C for up to 10 seconds per JESD 22-B106. Reflow profiles must comply with JEDEC J-STD-020, and hand-soldering should avoid prolonged localized heating beyond 350 °C to prevent internal bond wire damage or passivation layer degradation in the 1.5KE51CHE3/73.
1.5KE51CHE3/73 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):
- 41.3V
- Voltage - Breakdown (Min):
- 45.9V
- Voltage - Clamping (Max) @ Ipp:
- 73.5V
- Current - Peak Pulse (10/1000µs):
- 20.4A
- 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
1.5KE51CHE3/73 FAQ
1.How can I place an order for 1.5KE51CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE51CHE3/73 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 1.5KE51CHE3/73 reliable?
The price and inventory of 1.5KE51CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE51CHE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE51CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE51CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE51CHE3/73?
1.5KE51CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE51CHE3/73 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 1.5KE51CHE3/73?
For technical support, including 1.5KE51CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE51CHE3/73 requirements.
6.How does Aetrix verify that 1.5KE51CHE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE51CHE3/73 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 1.5KE51CHE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE51CHE3/73?
All 1.5KE51CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE51CHE3/73, 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 1.5KE51CHE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE51CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE51CHE3/73 Tags
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Toshiba Semiconductor and Storage
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