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Diodes Incorporated 1.5KE47A-T
- Part No.:
- 1.5KE47A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE47A-T.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:8,715
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Product details
Overview
1.5KE47A-T from Diodes Incorporated is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 40.2V reverse standoff voltage, 44.7V minimum breakdown voltage at 1mA test current, 64.8V maximum clamping voltage at 23.2A peak pulse current, and operates across -55°C to +175°C.
For engineers reviewing the 1.5KE47A-T datasheet, 1.5KE47A-T pinout, 1.5KE47A-T application, or 1.5KE47A-T equivalent, key selection criteria include clamping voltage margin relative to protected IC VMAX, peak pulse current capability under IEC 61000-4-5 surge waveforms, thermal derating above +25°C ambient, and compatibility with axial-leaded PCB layouts requiring RoHS-compliant tin-finish leads.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ps) and stable clamping performance under repetitive 1.0ms exponential current pulses. Its construction enables low leakage (<5.0 µA at 40.2V) and predictable voltage temperature coefficient (+0.101%/°C).
The device is rated for 1500W peak pulse power dissipation (tP = 1.0 ms), 5.0W steady-state power at 75°C lead temperature, and withstands 200A non-repetitive forward surge current (8.3 ms half-sine). It complies with RoHS 3 (2015/863/EU) and is halogen/antimony-free per Diodes' "Green" definition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W - Sustains single 1.0 ms 8/20 µs surge events without failure |
| Reverse Standoff Voltage | 40.2 V - Maximum continuous DC voltage before significant leakage begins |
| Breakdown Voltage | 44.7 V min @ 1 mA - Confirmed avalanche onset threshold for reliable triggering |
| Clamping Voltage | 64.8 V max @ 23.2 A - Limits downstream voltage during full-rated surge |
| Leakage Current | 5.0 µA max @ 40.2 V - Ensures minimal standby power loss in always-on systems |
| Operating Temperature | -55°C to +175°C - Supports under-hood automotive, industrial motor control, and outdoor power supply designs |
Pinout & Package
Package: DO-201 axial-leaded through-hole package with transfer-molded epoxy body (UL 94V-0), 1.12 g typical weight, and tin-finished leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Current exit point during forward conduction; marked with band | Connected to protected line; conducts when line voltage exceeds VRWM + VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Ensures long-term stability of breakdown voltage and leakage under thermal cycling and humidity stress |
| 1500W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4 kV line-to-line, 2 kV line-to-ground) surge immunity requirements |
| Fast response time | Sub-nanosecond junction response protects sensitive logic and analog inputs before damage occurs |
| RoHS 3 & "Green" compliant | Contains <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - satisfies automotive and EU environmental mandates |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Lines |
|---|---|
Use Scenario: 24V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary shunt clamping element placed between +24V rail and chassis ground. Use Value: Clamps surges up to 64.8V to prevent damage to upstream rectifier and downstream DC-DC controllers rated for 45V absolute maximum. |
Use Scenario: Protection of CAN_H/CAN_L differential pair in vehicle door module against ESD and battery disconnect transients. IC Role / Device Role / Timing Role: Unidirectional TVS on each line referenced to ground; used alongside common-mode choke. Use Value: Maintains CAN signal integrity by limiting voltage excursions to <65V while adding <0.5 pF parasitic capacitance. |
| Telecom AC-DC Adapter Secondary Side | Renewable Energy Inverter DC Link Monitoring |
Use Scenario: Output overvoltage protection on 12V/5V isolated secondary windings of wall-mount telecom adapter. IC Role / Device Role / Timing Role: Fail-safe crowbar element triggered only during sustained overvoltage or regulator fault. Use Value: Withstands repeated 1500W surges without parameter drift, enabling 10-year field reliability in Class II equipment. |
Use Scenario: Voltage monitoring circuit protection in solar string inverter DC link (400–800V nominal). IC Role / Device Role / Timing Role: Secondary-level clamp for auxiliary sensing rails derived from high-voltage bus via resistive divider. Use Value: Provides precise 40.2V standoff to avoid false trips during normal bus ripple, while clamping fast transients from IGBT switching noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | DO-214AA package; 43V standoff; 69.4V clamping @ 21.7A; 600W rating | Surface-mount footprint; lower power handling; higher thermal resistance | Select when board space is constrained and surge energy is ≤600W (e.g., consumer USB-C PD adapters) |
| 1.5SMC47A | SMA package; same 40.2V standoff; 64.8V clamping @ 23.2A; 1500W rating; same DO-201 pinout but smaller body | Same electrical specs but smaller 2.5g package; tighter mounting clearance required | Choose for legacy DO-201-compatible designs where axial lead length must be minimized (e.g., dense industrial backplanes) |
Compared with SMBJ43A and 1.5SMC47A, the 1.5KE47A-T delivers identical clamping performance at full 1500W rating in a robust axial-leaded form factor optimized for manual assembly, high-reliability thermal paths, and mechanical strain relief in vibration-prone environments.
Availability
1.5KE47A-T is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom adapters, and renewable energy inverters requiring stable component supply with traceable sourcing and long-lifecycle support.
Supply support for 1.5KE47A-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, with design, manufacturing, and sales operations across Asia, the Americas, and Europe.
The 1.5KE series targets high-energy transient suppression in harsh-environment applications including automotive, industrial automation, and infrastructure power systems, emphasizing rugged packaging, wide temperature operation, and compliance with international environmental standards.
FAQ
What is the difference between 1.5KE47A-T and 1.5KE47CA-T?
The 1.5KE47A-T is unidirectional with cathode band marking and conducts only in reverse avalanche mode; the 1.5KE47CA-T is bidirectional, lacks cathode marking, and clamps symmetrically for AC-coupled or floating signal lines. Both share identical 40.2V standoff and 64.8V clamping specs but differ in polarity behavior and marking convention.
Can 1.5KE47A-T be used in place of a 43V TVS in an existing design?
No - its 40.2V standoff and 44.7V minimum breakdown require verification against the protected circuit's maximum operating voltage and tolerance stack-up. Substituting without recalculating clamping margin risks premature conduction or insufficient protection during 43V-rated transients.
Is 1.5KE47A-T qualified to AEC-Q101 for automotive use?
No - while Diodes offers AEC-Q101-qualified TVS variants (e.g., P4SMA series), the 1.5KE47A-T is not AEC-Q101 certified. Automotive designs requiring PPAP or IATF 16949 traceability must use explicitly qualified alternatives or contact Diodes for custom qualification pathways.
What is the thermal resistance from junction to leads for 1.5KE47A-T?
Per DS21503 Rev. 12, the junction-to-lead thermal resistance (RθJL) is 15°C/W when mounted with 9.5 mm lead lengths at TL = 75°C. This value assumes standard axial mounting with no heatsinking; PCB copper area or lead bending significantly affects actual thermal performance.
1.5KE47A-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:
- 1
- Bidirectional Channels:
- -
- 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
1.5KE47A-T FAQ
1.How can I place an order for 1.5KE47A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE47A-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 1.5KE47A-T reliable?
The price and inventory of 1.5KE47A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE47A-T is usually 5 days.
3.What payment methods are accepted for 1.5KE47A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE47A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE47A-T?
1.5KE47A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE47A-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 1.5KE47A-T?
For technical support, including 1.5KE47A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE47A-T requirements.
6.How does Aetrix verify that 1.5KE47A-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE47A-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 1.5KE47A-T meets industry standards.
7.What is the process for return or replacement of 1.5KE47A-T?
All 1.5KE47A-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE47A-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 1.5KE47A-T part is unused and in its original packaging.
Return procedure for 1.5KE47A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE47A-T Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
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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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DESD5V0U1BB-7
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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D5V0L1B2WS-7
Diodes Incorporated
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