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Diodes Incorporated 1.5KE47CA-T
- Part No.:
- 1.5KE47CA-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE47CA-T.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:4,379
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Product details
Overview
1.5KE47CA-T from Diodes Incorporated is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with 40.2V reverse standoff voltage, 44.7–49.4V breakdown range, and 64.8V clamping voltage at 23.2A peak pulse current. It protects DC power rails and signal lines against ESD and lightning-induced surges in industrial power supplies and automotive electronics.
For engineers reviewing the 1.5KE47CA-T datasheet, 1.5KE47CA-T pinout, 1.5KE47CA-T application, or 1.5KE47CA-T equivalent, this page delivers verified electrical parameters, clamping performance under 1.0ms pulse, thermal derating behavior, RoHS-compliant lead finish, and direct substitution guidance for legacy 1.5KE-series TVS diodes.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling surge suppression on AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<5μA at 40.2V) over temperature.
The device uses an avalanche breakdown mechanism to clamp transients within nanoseconds, achieving fast response time and excellent clamping ratio (VC/VBR ≈ 1.45). It is rated for -55°C to +175°C operating junction temperature and complies with IEC 61000-4-2 Level 4 (±15kV contact discharge).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W at 1.0ms 10/1000μs waveform - sustains high-energy surges without failure |
| Reverse Standoff Voltage (VRWM) | 40.2V - maximum continuous DC or RMS voltage before significant leakage |
| Breakdown Voltage (VBR) | 44.7V min / 49.4V max @ 1.0mA - defines reliable avalanche initiation threshold |
| Clamping Voltage (VC) | 64.8V @ 23.2A IPP - limits downstream circuit voltage during surge event |
| Peak Pulse Current (IPP) | 23.2A - maximum non-repetitive surge current the device can safely divert |
| Operating Temperature | -55°C to +175°C - supports under-hood automotive and industrial environments |
| Leakage Current (IR) | ≤5.0μA @ 40.2V - ensures minimal standby power loss in battery-powered systems |
Pinout & Package
Package: DO-201 axial-leaded package with transfer-molded epoxy body (UL 94V-0), 1.12g weight, and tin-finished leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during negative transient | One end of symmetrical junction - no polarity marking required for bidirectional operation |
| Cathode | Current entry point during positive transient | Other end of symmetrical junction - device marked with type number only (no cathode band) |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures long-term parameter stability and resistance to humidity-induced degradation |
| Bidirectional configuration | Enables single-device protection of AC signals, differential buses, or ungrounded circuits |
| 1500W peak pulse rating | Meets IEC 61000-4-5 surge immunity requirements for industrial equipment |
| RoHS-compliant, halogen-free finish | Supports environmental compliance for global OEM production and automotive PPAP submissions |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 48V DC input stage of programmable logic controller (PLC) power supply against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary surge shunt element placed directly across input terminals, clamping voltage to safe level within <1ns. Use Value: Limits input rail excursion to ≤64.8V during 23.2A surge, preventing damage to upstream rectifiers and downstream DC-DC controllers. | Use Scenario: Safeguarding LIN bus transceiver inputs in door module against ESD and battery reversal events. IC Role / Device Role / Timing Role: Bidirectional clamping device connected between LIN line and ground, suppressing ±15kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity by limiting transient voltage to 64.8V while adding <0.5pF capacitance - negligible impact on 20kbps LIN timing. |
| Telecom Line Interface | Renewable Energy Inverter DC Link |
Use Scenario: Protecting RS-485 transceiver terminals in outdoor base station equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS placed after gas discharge tube (GDT), providing low-clamp refinement for residual transients. Use Value: Reduces clamped voltage from >100V (GDT alone) to 64.8V, ensuring transceiver survival under combined 1kV/500A surge test. | Use Scenario: Clamping overvoltage on 600V DC link of solar microinverter during rapid PV string disconnection. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC bus capacitors, absorbing stored inductive energy from gate driver turn-off. Use Value: Absorbs up to 1500W for 1ms, preventing bus voltage overshoot beyond 64.8V and avoiding IGBT desaturation fault. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45CA | 600W rating, SMB package, 45V VRWM, 70V VC @ 8.6A | Lower power handling; suited for PCB space-constrained designs with moderate surge exposure | Select when board area is limited and peak surge energy is ≤600W |
| 1.5SMC47CA | Same 1500W rating and 47V rating, but SMC package (surface-mount), 64.8V VC | No axial leads; requires reflow-compatible layout and eliminates through-hole assembly step | Select for automated SMT production where DO-201 axial insertion is undesirable |
Compared with SMBJ45CA and 1.5SMC47CA, the 1.5KE47CA-T offers identical clamping performance (64.8V) and higher surge robustness than SMBJ45CA, while retaining axial-leaded serviceability and legacy compatibility absent in SMC-packaged alternatives.
Availability
1.5KE47CA-T is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom line interfaces, and renewable energy inverters requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE47CA-T 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal devices, serving industrial, automotive, computing, and consumer markets with high-reliability components.
The 1.5KE series is part of Diodes' transient voltage suppression portfolio, engineered for high-energy surge immunity in harsh environments-designed specifically for load dump, ESD, and lightning surge protection in automotive and industrial power systems.
FAQ
What does the "CA" suffix indicate in 1.5KE47CA-T?
The "CA" suffix denotes a bidirectional configuration: the device provides symmetrical clamping for both positive and negative transients. Unlike unidirectional "A" variants, it has no cathode band marking and is used where polarity is undefined or alternating, such as AC signal lines or differential buses.
Is 1.5KE47CA-T still in active production?
No-1.5KE47CA-T is obsolete and discontinued per Diodes' DS21503 Rev. 12 (May 2023). Aetrix Electronics maintains limited legacy stock for design continuity and offers validated drop-in alternatives including 1.5SMC47CA (SMT) and SMBJ45CA (lower-power SMT), with full parametric and footprint compatibility analysis.
How does its clamping voltage compare to its breakdown voltage?
At 1.0mA test current, VBR is 44.7–49.4V; at 23.2A peak pulse, clamping voltage VC is 64.8V. This 1.45× ratio reflects efficient avalanche conduction-tighter than typical 1.5–1.8× ratios-enabling lower-voltage system protection margins without sacrificing surge capacity.
Can it replace a unidirectional 1.5KE47A-T in existing designs?
Only if circuit topology allows bidirectional clamping. The 1.5KE47CA-T lacks a cathode band and conducts equally in both directions, making it unsuitable where DC bias or polarity-sensitive protection is required (e.g., single-rail DC input). Unidirectional replacement requires verification of grounding scheme and transient polarity assumptions.
1.5KE47CA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 23.2A
- 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
1.5KE47CA-T FAQ
1.How can I place an order for 1.5KE47CA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE47CA-T 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 1.5KE47CA-T reliable?
The price and inventory of 1.5KE47CA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE47CA-T is usually 5 days.
3.What payment methods are accepted for 1.5KE47CA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE47CA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE47CA-T?
1.5KE47CA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE47CA-T 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 1.5KE47CA-T?
For technical support, including 1.5KE47CA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE47CA-T requirements.
6.How does Aetrix verify that 1.5KE47CA-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE47CA-T 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 1.5KE47CA-T meets industry standards.
7.What is the process for return or replacement of 1.5KE47CA-T?
All 1.5KE47CA-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE47CA-T, 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 1.5KE47CA-T part is unused and in its original packaging.
Return procedure for 1.5KE47CA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE47CA-T Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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