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Vishay General Semiconductor - Diodes Division 1.5KE51CHE3/54
- Part No.:
- 1.5KE51CHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE51CHE3/54.pdf
- Description:
- TVS DIODE 41.3VWM 73.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,320
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Product details
Overview
1.5KE51CHE3/54 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, and operates from –55 °C to +175 °C - deployed in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1.5KE51CHE3/54 datasheet, 1.5KE51CHE3/54 pinout, 1.5KE51CHE3/54 application, or 1.5KE51CHE3/54 equivalent, this page delivers verified electrical parameters, JEDEC-standard 1.5KE package details, clamping performance under surge conditions, thermal derating behavior, and RoHS-compliant AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
This device uses a glass-passivated silicon junction to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance, enabling effective suppression of lightning-induced transients and inductive switching spikes. Its unidirectional polarity provides asymmetric clamping with cathode-band marking and supports integration into DC-biased circuits where reverse conduction must be blocked.
The 1.5KE51CHE3/54 is rated for 1500 W peak pulse power per 10/1000 µs waveform at TA = 25 °C, with thermal derating above 25 °C per Fig. 2 and maximum junction temperature of 175 °C. It meets JESD 22-B106 solder dip (275 °C, 10 s) and JESD 201 Class 1A whisker testing (E3 suffix).
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 overvoltage detection |
| VWM | 43.6 V - maximum continuous working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 70.1 V at 21.4 A - actual clamped voltage during 1500 W transient, critical for downstream IC survivability |
| PPPM | 1500 W - peak surge energy handling capability with 10/1000 µs waveform, duty cycle ≤ 0.01 % |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), validates robustness against load dump |
| TJ max. | +175 °C - enables operation in under-hood automotive environments and high-temperature industrial enclosures |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance informs heatsinking requirements for sustained power dissipation |
Pinout & Package
Package: JEDEC-standard Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, RoHS compliant, and qualified to AEC-Q101 (HE3 suffix variant). Dimensions: 5.6 mm × 5.6 mm × 9.5 mm (L × W × H), lead length 9.5 mm (0.375″).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., GND or return path) in unidirectional configuration |
| Cathode | Reverse-biased clamping node | Marked with color band; connects to protected line (e.g., 48 V rail) to clamp positive transients |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity without external series impedance |
| Sub-nanosecond response time | Clamps transients before sensitive ICs (e.g., CAN transceivers, microcontrollers) experience overstress |
| AEC-Q101 qualification (HE3 variant) | Validates suitability for automotive powertrain and body electronics per stress test requirements |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes let-through voltage, reducing risk of latch-up or gate oxide damage in MOSFETs and ICs |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs from load dump and jump-start surges in commercial vehicle systems. IC Role / Device Role / Timing Role: Primary shunt clamping element placed directly across input terminals, responding within <1 ns to divert >20 A transients. Use Value: Limits voltage to ≤70.1 V during 1500 W surges, preventing damage to upstream DC/DC controllers and downstream MCU power domains. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input modules. IC Role / Device Role / Timing Role: Unidirectional TVS on 24 V sensor supply line, blocking reverse conduction while clamping positive spikes induced by relay coil de-energization. Use Value: Maintains signal integrity by holding line voltage below 70.1 V, avoiding ADC saturation and protecting op-amp front-end stages. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Inputs |
Use Scenario: Overvoltage protection on -48 V telecom rectifier outputs exposed to lightning-induced common-mode surges on outdoor cable runs. IC Role / Device Role / Timing Role: Cathode tied to -48 V rail, anode to chassis ground - clamps positive excursions relative to reference plane. Use Value: Withstands 1500 W pulses without degradation, meeting Telcordia GR-1089-CORE Level 3 surge requirements. | Use Scenario: Input-stage protection for BLDC motor drives in smart washing machines subjected to inductive kickback from brushed auxiliary pumps. IC Role / Device Role / Timing Role: Mounted across bridge rectifier output, absorbing 200 A surge currents from pump coil collapse. Use Value: Survives 200 A IFSM events without parametric shift, ensuring long-term reliability in high-cycle consumer applications. |
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 | Lower PPPM (600 W), smaller SMB package (4.5 × 3.9 × 2.3 mm), VC = 82.4 V @ 7.3 A | Not AEC-Q101 qualified; suitable for space-constrained consumer electronics, not automotive under-hood | Select when board area is constrained and surge energy is ≤600 W; verify layout clearance for higher VC. |
| 1.5KE51A-E3/54 | Same electrical specs and 1.5KE package, but commercial-grade (non-AEC-Q101); identical VBR, VC, PPPM | Lacks automotive qualification; used in industrial control panels and telecom infrastructure where AEC-Q101 is not mandated | Choose for cost-sensitive non-automotive designs requiring identical clamping performance and mechanical fit. |
Compared with 1.5KE51CHE3/54, SMBJ51A trades surge capacity and qualification for compactness, while 1.5KE51A-E3/54 retains full electrical and mechanical compatibility but omits AEC-Q101 validation - making the HE3 variant essential for automotive safety-critical power rails.
Availability
1.5KE51CHE3/54 is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial sensor interfaces, telecom DC feeds, and appliance motor drive protection requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE51CHE3/54 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, 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 robustness against lightning, load dump, and inductive switching is mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5KE51CHE3/54?
The 1.5KE51CHE3/54 has a specified breakdown voltage range of 48.5 V to 53.6 V at 1 mA test current, corresponding to ±5.5% tolerance around the nominal 51 V rating. This tight VBR window ensures consistent clamping onset across production lots and supports reliable overvoltage detection in precision power systems.
Is 1.5KE51CHE3/54 suitable for automotive applications?
Yes, 1.5KE51CHE3/54 is AEC-Q101 qualified (denoted by HE3 suffix), validated for automotive use including engine control units, body electronics, and ADAS power supplies. It meets stress tests for temperature cycling, humidity, mechanical shock, and surge robustness required for under-hood and cabin-mounted systems.
What does the "HE3" suffix indicate in 1.5KE51CHE3/54?
The "HE3" suffix in 1.5KE51CHE3/54 indicates RoHS compliance plus AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. The "E3" base denotes commercial-grade RoHS compliance, while "H" signifies automotive qualification - distinguishing it from standard 1.5KE51A-E3/54 which lacks AEC-Q101 validation.
How does 1.5KE51CHE3/54 compare to bidirectional variants like 1.5KE51C?
The 1.5KE51CHE3/54 is unidirectional and features a cathode band for polarity identification; 1.5KE51C is bidirectional with no marking and symmetric clamping in both directions. Bidirectional types are only offered up to 220 V VBR, so 1.5KE51C exists, but 1.5KE51CHE3/54 is selected when DC bias requires reverse-blocking capability.
What is the maximum clamping voltage of 1.5KE51CHE3/54 during a 1500 W transient?
The maximum clamping voltage (VC) of 1.5KE51CHE3/54 is 70.1 V at 21.4 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value represents the highest voltage imposed on the protected circuit during worst-case surge conditions and is critical for verifying safe operating margins of downstream components.
1.5KE51CHE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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
1.5KE51CHE3/54 FAQ
1.How can I place an order for 1.5KE51CHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE51CHE3/54 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 1.5KE51CHE3/54 reliable?
The price and inventory of 1.5KE51CHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE51CHE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE51CHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE51CHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE51CHE3/54?
1.5KE51CHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE51CHE3/54 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 1.5KE51CHE3/54?
For technical support, including 1.5KE51CHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE51CHE3/54 requirements.
6.How does Aetrix verify that 1.5KE51CHE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE51CHE3/54 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 1.5KE51CHE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE51CHE3/54?
All 1.5KE51CHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE51CHE3/54, 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 1.5KE51CHE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE51CHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE51CHE3/54 Tags
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