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onsemi 1.5KE16ARL4
- Part No.:
- 1.5KE16ARL4
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
1.5KE16ARL4.pdf
- Description:
- TVS 1500W 16V UNIDIRECT AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:16,500
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Product details
Overview
1.5KE16ARL4 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 13.6 V working peak reverse voltage (VRWM), 16 V breakdown voltage (VBR) at 1 mA test current, 22.5 V maximum clamping voltage (VC) at 67 A peak pulse current, and sub-1 ns response time. It is used in power supply input stages, industrial control I/O ports, and telecom line interfaces.
For engineers reviewing the 1.5KE16ARL4 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to protected IC VDD, VRWM compatibility with DC operating voltage, surge current handling (67 A @ 1 ms), UL 497B recognition for isolated loop circuits, and axial lead (Case 41A) mounting suitability for through-hole PCB designs.
Technical Context
The 1.5KE16ARL4 operates as a silicon avalanche diode in reverse-biased mode, entering conduction when transient voltage exceeds its specified VBR (15.2–16.8 V). Its low dynamic impedance (<1 Ω typical near VC) ensures stable clamping under high di/dt conditions. The device complies with UL 497B for isolated loop circuit protection and meets Class 3 ESD immunity (>16 kV HBM).
It is rated for non-repetitive 1500 W peak pulse power (1 ms, 10/1000 µs waveform), with thermal resistance RJL = 20 °C/W and steady-state power dissipation of 5.0 W at TL ≤ 75 °C. Lead temperature must not exceed 260 °C during soldering (10 s, 1/16″ from case).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 1 ms - withstands high-energy transients without failure |
| Working Peak Reverse Voltage (VRWM) | 13.6 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Breakdown Voltage (VBR) | 15.2–16.8 V @ 1 mA - precise avalanche onset threshold for predictable protection timing |
| Clamping Voltage (VC) | 22.5 V @ 67 A - limits transient voltage seen by downstream circuitry |
| Leakage Current (IR) | <5 µA @ 13.6 V - negligible standby power loss and signal interference |
| Response Time | <1 ns - fast enough to protect CMOS/MOS inputs before damage occurs |
| ESD Rating | Class 3 (>16 kV HBM) - exceeds IEC 61000-4-2 Level 4 requirements |
Pinout & Package
1.5KE16ARL4 uses an axial-leaded Surmetic plastic package (Case 41A), with cathode identified by a polarity band. Leads are tin-plated, solderable, and rated for 260 °C (10 s, 1/16″ from case).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node in clamping configuration |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., VIN, signal line); polarity band marks this terminal |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Validated for isolated loop circuit protection - enables use in safety-critical telecom and industrial isolation barriers |
| Pb-Free Axial Package | RoHS-compliant Case 41A construction - supports lead-free assembly without requalification |
| Low Clamping Ratio (VC/VBR) | ~1.41 (22.5 V / 16 V) - tight voltage margin preserves headroom for protected IC absolute maximum ratings |
| High Surge Current Capacity | 67 A peak pulse current - handles IEC 61000-4-5 Level 4 (4 kV, 2 Ω source) surges with margin |
| Thermal Robustness | RJL = 20 °C/W - enables reliable operation in ambient temperatures up to +175 °C junction |
Applications
| Industrial Power Supply Input Protection | Medical Equipment Signal Line Protection |
|---|---|
Use Scenario: 24 V DC industrial power rail exposed to load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input terminals to clamp positive transients before they reach DC/DC converters and microcontrollers. Use Value: 22.5 V clamping voltage prevents overvoltage stress on 24 V-rated input-stage MOSFETs and LDOs while surviving 67 A surge events. | Use Scenario: Analog sensor interface lines (e.g., thermocouple, pressure transducer) in hospital-grade monitors. IC Role / Device Role / Timing Role: Low-leakage (≤5 µA) TVS mounted directly at connector entry to suppress ESD and EFT without distorting mV-level signals. Use Value: Sub-1 ns response and <5 µA leakage preserve signal integrity and meet IEC 60601-1-2 ESD immunity requirements. |
| Telecom Isolated Loop Interface | PLC Digital I/O Protection |
Use Scenario: 48 V DC-powered RS-485 or current-loop (20 mA) communication lines in base stations. IC Role / Device Role / Timing Role: UL 497B-recognized TVS installed on primary side of isolation barrier to absorb common-mode surges before galvanic isolation components. Use Value: UL certification validates compliance for telecom infrastructure; 13.6 V VRWM matches typical loop bias voltages. | Use Scenario: 24 V digital input modules in programmable logic controllers subject to field wiring faults and inductive kick. IC Role / Device Role / Timing Role: Through-hole TVS mounted at terminal block to shunt surge energy away from optocoupler input stages and series current-limiting resistors. Use Value: Axial lead (Case 41A) allows robust mechanical mounting near connectors; 1500 W rating handles repetitive 24 V system transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16A | Surface-mount SMB package; 1500 W rating; VRWM = 13.6 V; VC = 24.4 V @ 61.5 A | Requires PCB redesign for SMT layout; lower clamping margin than 1.5KE16ARL4 | Select when board space is constrained and automated assembly is required |
| 1N6276A | Same die and electrical specs; axial lead, bulk-packaged (500 units/box) instead of tape-and-reel | No functional difference; differs only in packaging format and reel orientation | Select when manual or semi-automated placement is used and reel feeding is unnecessary |
Compared with SMBJ16A and 1N6276A, the 1.5KE16ARL4 offers identical electrical performance to 1N6276A but in Pb-free tape-and-reel format optimized for high-volume pick-and-place, while providing a lower clamping voltage (22.5 V vs. 24.4 V) than SMBJ16A-critical for protecting 16 V-tolerant interfaces.
Availability
1.5KE16ARL4 is available at Aetrix Electronics and suitable for industrial power supplies, medical instrumentation, telecom infrastructure, and PLC I/O modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5KE16ARL4 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 onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The 1.5KE16ARL4 belongs to the 1.5KE Series Mosorb TVS family, engineered for high-reliability, high-surge-capacity overvoltage protection in harsh industrial and communications environments where axial-leaded robustness and UL-certified performance are mandatory.
FAQ
What is the clamping voltage of the 1.5KE16ARL4 and how is it measured?
The 1.5KE16ARL4 has a maximum clamping voltage (VC) of 22.5 V, measured at a peak pulse current (IPP) of 67 A with a 1 ms exponential waveform (10/1000 µs). This value represents the highest voltage the device allows across its terminals during a standardized surge event, ensuring downstream components remain within safe operating limits. The 1.5KE16ARL4's VC is confirmed per ON Semiconductor's official datasheet revision 13.
Is the 1.5KE16ARL4 RoHS compliant and what does the 'RL4' suffix indicate?
Yes, the 1.5KE16ARL4 is RoHS compliant and Pb-free. The 'RL4' suffix denotes a Pb-free axial-leaded package supplied in tape-and-reel format (1500 units per reel), with lead finish and dimensions conforming to ON Semiconductor's Case 41A specification. This packaging enables automated surface-mount assembly despite the part being through-hole compatible.
Does the 1.5KE16ARL4 have UL recognition and for which standard?
Yes, the 1.5KE16ARL4 carries UL Recognition under UL 497B for isolated loop circuit protection (File #E210057, QVGQ2 category). This certification covers surge endurance, dielectric withstand, and flammability testing-validating its use in safety-critical telecom and industrial isolation applications where regulatory compliance is mandatory.
What is the maximum working peak reverse voltage (VRWM) for the 1.5KE16ARL4 and why is it important?
The 1.5KE16ARL4 has a VRWM of 13.6 V-the highest continuous DC or peak AC voltage it can block without significant leakage. Selecting a VRWM ≥ the circuit's normal operating voltage prevents false triggering while maintaining sufficient margin below VBR (15.2–16.8 V). For a 12 V system, this 13.6 V VRWM ensures reliable standby operation and robust transient response.
Can the 1.5KE16ARL4 be used in bidirectional configurations?
No, the 1.5KE16ARL4 is strictly unidirectional and must be oriented with cathode toward the protected line and anode to ground. Bidirectional protection requires either two 1.5KE16ARL4 devices in series opposition or a dedicated bidirectional TVS such as 1.5KE16CA. Using a single 1.5KE16ARL4 in reverse polarity will not suppress negative transients.
1.5KE16ARL4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- -
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
1.5KE16ARL4 FAQ
1.How can I place an order for 1.5KE16ARL4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE16ARL4 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 1.5KE16ARL4 reliable?
The price and inventory of 1.5KE16ARL4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE16ARL4 is usually 5 days.
3.What payment methods are accepted for 1.5KE16ARL4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE16ARL4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE16ARL4?
1.5KE16ARL4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE16ARL4 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 1.5KE16ARL4?
For technical support, including 1.5KE16ARL4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE16ARL4 requirements.
6.How does Aetrix verify that 1.5KE16ARL4 is sourced from the original manufacturer or authorized distributors?
All 1.5KE16ARL4 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 1.5KE16ARL4 meets industry standards.
7.What is the process for return or replacement of 1.5KE16ARL4?
All 1.5KE16ARL4 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE16ARL4, 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 1.5KE16ARL4 part is unused and in its original packaging.
Return procedure for 1.5KE16ARL4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE16ARL4 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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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
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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