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Taiwan Semiconductor Corporation 1.5KE51CA B0G
- Part No.:
- 1.5KE51CA B0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE51CA B0G.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:4,977
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Product details
Overview
1.5KE51CA B0G from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 51V, working stand-off voltage 41.3V, clamping voltage 70.1V at 22A peak impulse current, and junction temperature rating up to +175°C - used for ISO 7637-2 Pulse 1/2a/2b/3a/3b protection in automotive power line interfaces.
For engineers reviewing the 1.5KE51CA B0G datasheet, 1.5KE51CA B0G pinout, 1.5KE51CA B0G application, or 1.5KE51CA B0G equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, DO-201 mechanical data, AEC-Q101 qualification status, and real-world EFT/inductive-switching protection use cases.
Technical Context
The 1.5KE51CA B0G is a bidirectional TVS diode designed for high-energy transient suppression on DC power rails and signal lines. It exhibits low dynamic impedance and sub-nanosecond response time (<1ps for unidirectional, 5ns for bidirectional), enabling effective clamping of fast transients such as ESD and load dump spikes.
Its electrical behavior is defined by symmetric breakdown characteristics in both directions (VBR min/max = 48.5V/53.6V at IT = 1mA), maximum clamping voltage VC = 70.1V at IPP = 22A, and leakage current <1μA at VWM = 41.3V - all specified per ANSI/IEEE C62.35 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1mA | 48.5V min / 53.6V max - defines precise voltage threshold where avalanche conduction begins in both directions |
| VWM | 41.3V - maximum continuous reverse operating voltage before significant leakage occurs |
| VC @ IPP = 22A | 70.1V - clamped voltage during 10/1000μs surge, limiting downstream circuit stress |
| PPK | 1500W - peak pulse power handling capability under standardized surge waveform |
| IPP | 22A - maximum non-repetitive peak impulse current it can safely divert |
| Junction Temp Range | –55°C to +175°C - supports operation in under-hood automotive environments |
| Leakage @ VWM | <1μA - ensures minimal standby power loss and no interference with low-power circuits |
Pinout & Package
DO-201 axial-leaded package with cathode band marking; two-terminal device with symmetrical bidirectional conduction - no polarity-sensitive orientation required in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (reversible) | Bidirectional avalanche junction | Either lead serves as anode or cathode depending on transient polarity - enables single-device protection of AC or floating DC lines |
| Case | Non-conductive molded body | UL 94V-0 rated epoxy housing provides mechanical robustness and flame resistance |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of differential or floating nodes without external polarity management |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT) immunity requirements |
| Low clamping ratio (VC/VBR) | ~1.45 - tight voltage margin between breakdown and clamping improves system-level overvoltage margin |
| Halogen-free construction | Complies with IEC 61249-2-21, supporting RoHS and environmental compliance programs |
Applications
| Automotive Power Line Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12V/24V battery-fed ECUs from load dump and jump-start surges per ISO 7637-2 Pulse 5a/5b. IC Role / Device Role / Timing Role: Primary front-end transient shunt placed directly across input terminals before DC-DC converter. Use Value: Clamps 10/1000μs surges to ≤70.1V, preventing damage to upstream regulators and microcontrollers rated for 40V absolute max. | Use Scenario: Safeguarding 24V digital input modules against inductive kickback from solenoid/relay coils. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to absorb reverse EMF energy during coil de-energization. Use Value: Withstands 22A peak impulse current and maintains <1μA leakage at 41.3V, preserving signal integrity during normal operation. |
| LED Driver Surge Suppression | RS-485 Transceiver Bus Protection |
Use Scenario: Shielding constant-current LED drivers from EFT bursts and lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Parallel-connected TVS on driver output to clamp transients before they reach LED string or current-sense circuitry. Use Value: Sub-5ns response time ensures clamping activation before sensitive analog feedback paths are disrupted. | Use Scenario: Protecting half-duplex RS-485 transceivers (e.g., SN65HVD230) on industrial fieldbus networks exposed to ground potential differences. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential bus lines (A/B) to suppress common-mode surges without affecting DC bias. Use Value: Symmetric VBR (48.5–53.6V) ensures balanced clamping on both polarities, maintaining signal eye integrity during EMC testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | Lower PPK (600W), smaller SMB package, VC = 87.1V @ 6.9A | Not suitable for 1500W ISO 7637-2 Pulse 5a; limited to lower-energy EFT/ESD scenarios | Select when board space is constrained and surge energy is ≤600W |
| 1.5SMC51CA | Same 1500W rating but SMC package (surface-mount), VC = 70.1V @ 22A, identical electrical specs | Requires rework of through-hole footprint; better thermal performance with PCB copper pour | Choose for automated assembly and improved thermal dissipation in dense layouts |
Compared with 1.5KE51CA B0G, SMBJ51CA offers compact size but reduced surge capacity, while 1.5SMC51CA matches its 1500W/70.1V performance in surface-mount form - making the latter a direct functional alternative where DO-201's axial leads are not required.
Availability
1.5KE51CA B0G is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O conditioning, LED driver surge hardening, and RS-485 bus protection requiring stable component supply across extended production lifecycles.
Supply support for 1.5KE51CA B0G 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer applications.
The 1.5KE series was developed specifically for high-reliability transient suppression in harsh environments, with AEC-Q101 qualification and ISO 7637-2 compliance built into its design architecture from wafer to final test.
FAQ
What does the 'CA' suffix indicate in 1.5KE51CA B0G?
The 'CA' suffix in 1.5KE51CA B0G denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, unlike unidirectional variants ending in 'A'. This allows it to protect AC-coupled or floating DC circuits without polarity concerns, and is explicitly confirmed in the datasheet for types 1.5KE6.8 through 1.5KE440. The 1.5KE51CA B0G therefore functions identically in either orientation across the protected line.
Is 1.5KE51CA B0G AEC-Q101 qualified?
Yes, 1.5KE51CA B0G is AEC-Q101 qualified, as stated in the "FEATURES" section of the official Taiwan Semiconductor datasheet (Version O2104). This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD - confirming suitability for automotive powertrain and chassis applications where reliability under thermal and electrical stress is critical. The 'B0G' suffix aligns with TSC's standard packaging code for qualified DO-201 devices.
What is the clamping voltage of 1.5KE51CA B0G at its rated surge current?
The clamping voltage of 1.5KE51CA B0G is 70.1V measured at IPP = 22A under the standard 10/1000μs double-exponential surge waveform. This value is specified in the Electrical Specifications table on page 3 of the Taiwan Semiconductor datasheet and represents the maximum voltage seen across the device during worst-case transient events - a key parameter for ensuring downstream ICs remain within their absolute maximum ratings.
How does 1.5KE51CA B0G differ from the unidirectional 1.5KE51A?
The 1.5KE51CA B0G is bidirectional with symmetrical breakdown (48.5–53.6V in both directions), while 1.5KE51A is unidirectional and conducts only in reverse bias. The CA version has no cathode marking requirement and may be mounted without orientation concern; the A version requires correct polarity placement. Both share identical VWM (41.3V), PPK (1500W), and thermal ratings, but only the CA variant meets requirements for AC or differential-line protection.
What package type and lead finish does 1.5KE51CA B0G use?
1.5KE51CA B0G uses the DO-201 axial-leaded package with pure tin-plated leads compliant with J-STD-002 solderability requirements. Its mechanical outline conforms to JEDEC DO-201 standards, and the molding compound meets UL 94V-0 flammability rating. The device weighs approximately 0.090g and passes JESD201 Class 2 whisker testing - confirming long-term interconnect reliability in vibration-prone environments like automotive under-hood installations.
1.5KE51CA B0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- 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):
- 22A
- 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-201
1.5KE51CA B0G FAQ
1.How can I place an order for 1.5KE51CA B0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE51CA B0G 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 1.5KE51CA B0G reliable?
The price and inventory of 1.5KE51CA B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE51CA B0G is usually 5 days.
3.What payment methods are accepted for 1.5KE51CA B0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE51CA B0G transactions.
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4.How is shipping managed for 1.5KE51CA B0G?
1.5KE51CA B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE51CA B0G 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 1.5KE51CA B0G?
For technical support, including 1.5KE51CA B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE51CA B0G requirements.
6.How does Aetrix verify that 1.5KE51CA B0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE51CA B0G 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 1.5KE51CA B0G meets industry standards.
7.What is the process for return or replacement of 1.5KE51CA B0G?
All 1.5KE51CA B0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE51CA B0G, 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 1.5KE51CA B0G part is unused and in its original packaging.
Return procedure for 1.5KE51CA B0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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