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onsemi 1.5KE47ARL4
- Part No.:
- 1.5KE47ARL4
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1.5KE47ARL4.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,531
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Product details
Overview
1.5KE47ARL4 from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against ESD, lightning surges, and inductive switching transients. It features a 40.2 V working peak reverse voltage (VRWM), 47 V breakdown voltage (VBR) at 1 mA test current, and clamps to ≤64.8 V at 23.2 A peak pulse current (IPP), making it suitable for DC power rail protection in industrial power supplies and communication interfaces.
For engineers reviewing the 1.5KE47ARL4 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to protected IC VMAX, VRWM compatibility with system operating voltage, surge current capability under 1 ms pulses, and UL 497B recognition for isolated loop circuit compliance.
Technical Context
This axial-leaded TVS operates as a voltage-clamped shunt device: when reverse voltage exceeds VBR (~47 V), it avalanches into low-impedance conduction, diverting surge current away from downstream components. Its <1 ns response time ensures suppression before transient energy damages CMOS or MOS inputs.
Thermal design relies on junction-to-lead resistance (RJL = 20 °C/W) and derated steady-state power (5.0 W at TL ≤ 75 °C). The Surmetic plastic case (Case 41A) enables reliable soldering at 260 °C for 10 seconds at 1/16″ from case, supporting automated assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 1 ms - sustains single high-energy transients without failure |
| Working Peak Reverse Voltage (VRWM) | 40.2 V - maximum continuous DC or peak AC voltage the device blocks without leakage |
| Breakdown Voltage (VBR) | 44.7–49.4 V @ 1 mA - precise avalanche onset threshold for predictable clamping |
| Clamping Voltage (VC) | ≤64.8 V @ IPP = 23.2 A - maximum voltage seen by protected circuit during worst-case surge |
| Leakage Current (IR) | <5 µA @ 40.2 V - negligible standby power loss and signal integrity impact |
| ESD Rating | Class 3 (>16 kV HBM) - withstands human-body model discharges common in handling and operation |
| UL Recognition | UL 497B QVGQ2 - certified for use in isolated loop circuit protection per safety standard |
Pinout & Package
1.5KE47ARL4 uses an axial-leaded Surmetic plastic package (Case 41A), with cathode indicated by a polarity band. Leads are tin-plated copper, corrosion-resistant, and solderable per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lowest potential node in clamping configuration |
| Cathode | High-side connection point | Connected to protected line (e.g., +12 V rail); polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | Typically <1 ns - limits voltage overshoot before clamping engages |
| Low zener impedance | Dynamic impedance <1 Ω near VBR - ensures tight clamping with minimal voltage rise under surge |
| Pb-free axial packaging | RoHS-compliant Surmetic Case 41A - supports lead-free reflow and wave soldering processes |
| High surge reliability | Rated for ≥1000 non-repetitive 1 ms pulses at full PPK - validated for long-term field durability |
| UL 497B certification | Recognized for isolated loop protection - eliminates need for separate safety qualification in telecom/power systems |
Applications
| Industrial Power Supply Protection | RS-485 Communication Interface |
|---|---|
Use Scenario: Protecting +24 V DC input rails in programmable logic controllers (PLCs) against load dump and inductive kickback. IC Role / Device Role / Timing Role: Shunt clamping TVS placed between rail and chassis ground, activated within nanoseconds of overvoltage event. Use Value: Limits rail voltage to ≤64.8 V, preventing damage to upstream DC-DC converters and downstream microcontrollers rated for 36 V max. |
Use Scenario: Safeguarding RS-485 transceivers (e.g., MAX1487) in factory automation networks exposed to cable ESD and ground potential differences. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; unidirectional 1.5KE47ARL4 used on VCC line only, while separate TVS handles differential lines. Use Value: Clamps VCC surges to safe level before they couple into transceiver supply pins, avoiding latch-up or permanent damage. |
| Medical Equipment Power Input | Point-of-Sale Terminal Power Entry |
Use Scenario: Securing 48 V auxiliary power inputs in diagnostic imaging devices subject to hospital-grade surge testing (IEC 61000-4-5 Level 4). IC Role / Device Role / Timing Role: Primary overvoltage clamp on main DC input, coordinated with upstream fuse and filter inductors. Use Value: Absorbs 1500 W surge energy without degradation, maintaining immunity across product lifetime per IEC 60601-1 requirements. |
Use Scenario: Protecting 12 V DC power entry in retail POS terminals connected to shared building wiring prone to lightning-induced transients. IC Role / Device Role / Timing Role: First-line defense on bulk input, placed immediately after connector before DC-DC regulation stage. Use Value: UL 497B recognition validates suitability for safety-critical power entry circuits in commercial equipment certifications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | Lower peak power (600 W), smaller SMC package (surface-mount), lower clamping voltage (69.4 V @ 8.7 A) | Better suited for PCB space-constrained designs; requires layout optimization for thermal dissipation | Select when board area is limited and surge duty is less severe than industrial 1500 W requirement |
| 1.5KE47A | Identical electrical specs but in bulk box packaging (500 units/box) instead of tape-and-reel (1500/T&R); same Case 41A axial construction | No functional difference; choice driven by production volume and assembly method (manual vs. auto-placement) | Choose 1.5KE47A for prototyping or low-volume hand-soldered builds; 1.5KE47ARL4 for high-volume automated assembly |
Compared with SMBJ43A, 1.5KE47ARL4 delivers 2.5× higher surge energy handling in a through-hole package ideal for high-reliability power inputs; compared with 1.5KE47A, it offers identical protection performance with optimized logistics for pick-and-place manufacturing.
Availability
1.5KE47ARL4 is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 communication interfaces, and medical equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5KE47ARL4 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
ON Semiconductor (now part of onsemi) is a global semiconductor manufacturer specializing in power management, analog, sensor, and discrete solutions for automotive, industrial, cloud, and IoT applications.
The 1.5KE47ARL4 belongs to the 1.5KE series of Mosorb™ TVS diodes, engineered specifically for high-energy transient suppression in harsh industrial and communications environments where reliability and safety certification are critical.
FAQ
What is the clamping voltage of the 1.5KE47ARL4 under maximum surge conditions?
The 1.5KE47ARL4 clamps to a maximum of 64.8 V when subjected to its rated peak pulse current of 23.2 A (1 ms exponential waveform). This value is measured per Figure 5 in the datasheet and represents the highest voltage the protected circuit will experience during a worst-case transient, ensuring compatibility with 36 V or 48 V system components.
Is the 1.5KE47ARL4 RoHS compliant and lead-free?
Yes, the 1.5KE47ARL4 is a Pb-free device in ON Semiconductor's Surmetic axial package (Case 41A), meeting RoHS Directive 2011/65/EU. The "G" suffix in the full orderable part number (1.5KE47ARL4G) explicitly denotes Pb-free construction, and the leads are tin-plated for compatibility with lead-free soldering processes up to 260 °C.
Can the 1.5KE47ARL4 be used for bidirectional transient protection?
No, the 1.5KE47ARL4 is a unidirectional TVS diode and must be used with correct polarity: cathode to the protected line, anode to ground. For bidirectional protection (e.g., data lines), a dedicated bidirectional TVS like SMAJ43CA or separate back-to-back unidirectional devices would be required - the 1.5KE47ARL4 does not conduct in forward bias beyond its 3.5 V forward voltage limit.
What is the maximum steady-state power dissipation rating for the 1.5KE47ARL4?
The 1.5KE47ARL4 has a steady-state power dissipation rating of 5.0 W at lead temperature (TL) ≤ 75 °C, with derating of 20 mW/°C above that temperature. This rating applies only to continuous DC or low-frequency AC stress - the device is intended for transient suppression, not sustained power dissipation.
Does the 1.5KE47ARL4 have UL recognition for safety-critical applications?
Yes, the 1.5KE47ARL4 carries UL 497B recognition (File #E210057, category QVGQ2) for isolated loop circuit protection. This certification covers tests including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance - confirming its suitability for safety-rated telecom and industrial power systems.
1.5KE47ARL4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-201AD, Axial
- Series:
- Mosorb™
- 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:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1.5KE47ARL4 FAQ
1.How can I place an order for 1.5KE47ARL4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE47ARL4 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 1.5KE47ARL4 reliable?
The price and inventory of 1.5KE47ARL4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE47ARL4 is usually 5 days.
3.What payment methods are accepted for 1.5KE47ARL4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE47ARL4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE47ARL4?
1.5KE47ARL4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE47ARL4 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 1.5KE47ARL4?
For technical support, including 1.5KE47ARL4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE47ARL4 requirements.
6.How does Aetrix verify that 1.5KE47ARL4 is sourced from the original manufacturer or authorized distributors?
All 1.5KE47ARL4 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 1.5KE47ARL4 meets industry standards.
7.What is the process for return or replacement of 1.5KE47ARL4?
All 1.5KE47ARL4 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE47ARL4, 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 1.5KE47ARL4 part is unused and in its original packaging.
Return procedure for 1.5KE47ARL4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE47ARL4 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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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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