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Taiwan Semiconductor Corporation 1V5KE51CA
- Part No.:
- 1V5KE51CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1V5KE51CA.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:3,003
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Product details
Overview
1V5KE51CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-201 package, designed for high-energy surge protection in power and signal lines. It features a 48.5–53.6 V breakdown voltage (VBR), 43.6 V reverse stand-off voltage (VRWM), 1500 W peak pulse power (1 ms), 70.1 V clamping voltage at 21.4 A, and <1 µA leakage above 10 V. It protects automotive power supplies and industrial I/O interfaces against ESD and lightning-induced transients.
For engineers reviewing the 1V5KE51CA datasheet, 1V5KE51CA pinout, 1V5KE51CA application, or 1V5KE51CA equivalent, key selection criteria include verified bidirectional clamping performance, DO-201 mechanical compatibility, 175°C junction temperature rating, low incremental surge resistance, and compliance with IEC 61000-4-2/4-4/4-5 immunity standards.
Technical Context
The 1V5KE51CA operates as a silicon avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to transient overvoltages. Its symmetrical bidirectional structure ensures identical clamping behavior in both polarities, supporting AC line and differential bus protection without polarity concerns.
It delivers 1500 W peak pulse power per JEDEC standard (10/1000 µs waveform) and maintains stable clamping up to 175°C junction temperature. The device exhibits low dynamic impedance (incremental surge resistance) and typical reverse leakage <1 µA at 10 V above VRWM, ensuring minimal standby power loss in protected circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V - guaranteed avalanche conduction onset across production lot; defines minimum overvoltage threshold before clamping begins |
| VRWM | 43.6 V - maximum continuous reverse operating voltage; circuit must stay below this to avoid leakage or degradation |
| VC @ IPPM | 70.1 V at 21.4 A - clamped voltage during full 1500 W surge; determines maximum stress on downstream ICs |
| PPPM | 1500 W (1 ms) - peak transient energy absorption capability; validates suitability for IEC 61000-4-5 Level 4 (4 kV/2 Ω) |
| IR @ VRWM | <1 µA - negligible standby current; avoids loading of high-impedance sensor or reference circuits |
| TJ max | 175 °C - enables operation in under-hood automotive or enclosed industrial enclosures without derating |
| Package | DO-201 - industry-standard axial leaded package with 0.090 g mass; compatible with wave soldering and manual rework |
Pinout & Package
Package: DO-201 - axial-leaded, molded epoxy case with cathode band marking (for unidirectional variants); bidirectional 1V5KE51CA has no polarity marking and functions identically in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts surge current when voltage at this terminal falls ≥VBR below cathode; symmetric with cathode in bidirectional mode |
| Cathode | Transient current entry (positive half-cycle) | Conducts surge current when voltage at this terminal rises ≥VBR above anode; identical clamping behavior to anode due to bipolar construction |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term reliability and stable VBR under thermal cycling and humidity exposure |
| 1500 W peak pulse power (1 ms) | Validates robustness against 4 kV IEC 61000-4-5 combination wave surges in industrial power inputs |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., EFT bursts), improving protection margin |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental compliance requirements for automotive and industrial end equipment |
| Fast response time (<1 ns) | Clamps transients before sensitive logic or analog circuitry sustains damage |
Applications
| Industrial PLC Analog Input Protection | Automotive Body Control Module Power Bus |
|---|---|
Use Scenario: 4–20 mA current loop input exposed to field wiring surges in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to clamp ±2 kV EFT and ±1 kV surge events. Use Value: Prevents op-amp and ADC damage while maintaining <1 µA leakage to preserve loop accuracy and calibration stability. | Use Scenario: 12 V battery-supplied microcontroller power rail subject to load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main VCC rail upstream of LDO regulators. Use Value: Limits rail voltage to ≤70.1 V during 1500 W surges, protecting 3.3 V/5 V logic and CAN transceivers without crowbar action. |
| Telecom DSL Line Interface Protection | Smart Meter AC Mains Surge Suppression |
Use Scenario: Twisted-pair DSL line interface connected to outdoor copper plant vulnerable to induced lightning. IC Role / Device Role / Timing Role: Differential-mode TVS pair (two 1V5KE51CA) across tip/ring to suppress common-mode surges. Use Value: Symmetric 48.5–53.6 V breakdown ensures balanced clamping, preserving DSL signal integrity up to 30 MHz. | Use Scenario: 230 VAC input stage of utility smart meter subjected to 6 kV/0.5 Ω surge per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary clamping device after MOV, absorbing residual energy and limiting let-through voltage. Use Value: 70.1 V clamping voltage enables use of lower-voltage-rated bridge rectifiers and bulk capacitors, reducing BOM cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA (Bourns) | Same VRWM/VBR/VC specs but in SMB (DO-214AA) surface-mount package; 600 W PPPM | Lower power rating limits use to sub-2 kV IEC 61000-4-5 applications; requires PCB layout change | Select when space-constrained designs prioritize SMT assembly over surge robustness |
| 1N6288 (ON Semiconductor) | Identical DO-201 package, same VBR (48.5–53.6 V), but rated at 1.5 kW with 70 V VC; RoHS compliant | Functionally interchangeable in all 1V5KE51CA applications; minor VC variance (±0.1 V) has no system impact | Preferred for second-source assurance where Taiwan Semiconductor supply continuity is constrained |
Compared with SMBJ51CA and 1N6288, the 1V5KE51CA offers the highest surge power handling in axial-leaded form factor, making it optimal for high-reliability industrial and automotive replacements where through-hole mounting and 1500 W immunity are mandatory.
Availability
1V5KE51CA is available at Aetrix Electronics and suitable for industrial PLC analog inputs, automotive body control module power rails, telecom DSL line interfaces, and smart meter AC mains surge suppression requiring stable component supply and long-lifecycle support.
Supply support for 1V5KE51CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial and automotive markets.
The 1V5KExxCA series targets high-energy transient protection in harsh environments, with design focus on stable clamping, high-temperature operation, and mechanical ruggedness for under-hood and factory-floor deployment.
FAQ
What is the clamping voltage of the 1V5KE51CA under a 1500 W surge?
The 1V5KE51CA clamps to 70.1 V at its peak pulse current of 21.4 A, corresponding to the standardized 10/1000 µs waveform and 1500 W peak power. This value is measured and guaranteed per JEDEC test conditions and defines the maximum voltage imposed on protected circuitry during worst-case surge events.
Is the 1V5KE51CA unidirectional or bidirectional?
The "CA" suffix in 1V5KE51CA explicitly denotes bidirectional construction. Unlike unidirectional variants (e.g., 1V5KE51A), the 1V5KE51CA provides symmetrical clamping in both polarities, making it suitable for AC lines, differential buses, and applications where voltage polarity reversal is possible.
What package type does the 1V5KE51CA use, and is it lead-free?
The 1V5KE51CA uses the DO-201 axial-leaded package with pure tin-plated leads, fully compliant with J-STD-002 solderability requirements. It is RoHS-compliant and halogen-free per IEC 61249-2-21, with no lead content and full exemption documentation available upon request.
Can the 1V5KE51CA replace the 1N6288 in existing designs?
Yes - the 1V5KE51CA and 1N6288 share identical electrical specifications (VBR, VRWM, VC, PPPM) and DO-201 packaging. Both meet 1500 W surge rating and 175°C TJ max, enabling direct drop-in replacement without layout or firmware changes in legacy 1N6288 designs.
What is the maximum reverse leakage current for the 1V5KE51CA at its rated VRWM?
At its reverse stand-off voltage of 43.6 V, the 1V5KE51CA exhibits ≤1 µA typical reverse leakage current at 25°C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and avoids unnecessary power drain in battery-backed systems.
1V5KE51CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AD, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 21.4A
- 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:
- DO-201AD
1V5KE51CA FAQ
1.How can I place an order for 1V5KE51CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1V5KE51CA 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 1V5KE51CA reliable?
The price and inventory of 1V5KE51CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1V5KE51CA is usually 5 days.
3.What payment methods are accepted for 1V5KE51CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1V5KE51CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1V5KE51CA?
1V5KE51CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1V5KE51CA 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 1V5KE51CA?
For technical support, including 1V5KE51CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1V5KE51CA requirements.
6.How does Aetrix verify that 1V5KE51CA is sourced from the original manufacturer or authorized distributors?
All 1V5KE51CA 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 1V5KE51CA meets industry standards.
7.What is the process for return or replacement of 1V5KE51CA?
All 1V5KE51CA units undergo pre-shipment inspection (PSI). If there is an issue with 1V5KE51CA, 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 1V5KE51CA part is unused and in its original packaging.
Return procedure for 1V5KE51CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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