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onsemi 1.5KE12ARL4
- Part No.:
- 1.5KE12ARL4
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1.5KE12ARL4.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,395
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Product details
Overview
1.5KE12ARL4 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 10.2 V working peak reverse voltage (VRWM), 12 V nominal breakdown voltage (VBR), 16.7 V maximum clamping voltage (VC) at 90 A peak pulse current (IPP), and sub-1 ns response time - deployed in power supplies, industrial controls, and medical equipment input stages.
For engineers reviewing the 1.5KE12ARL4 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to protected IC VDD, VRWM alignment with DC bus voltage, surge current capability under 1 ms pulses, and UL 497B recognition for isolated loop circuit compliance.
Technical Context
This device operates as a silicon avalanche diode in reverse-biased mode, entering controlled breakdown when transient voltage exceeds VBR (11.4–12.6 V at 1 mA). Its low dynamic impedance (<1 Ω typical near VBR) ensures stable clamping during 8.3 ms half-sine surges up to 90 A without thermal runaway.
Designed for axial-lead mounting in CASE 41A (Surmetic) plastic package, it delivers 1500 W peak power per 1 ms pulse at TL ≤ 25°C, with thermal resistance RJL = 20°C/W and operating junction temperature range of −65°C to +175°C - enabling robust performance in high-reliability industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 1 ms pulse - sustains single high-energy transients without failure |
| Working Peak Reverse Voltage (VRWM) | 10.2 V - maximum continuous DC or peak AC voltage before leakage exceeds 5 µA |
| Breakdown Voltage (VBR) | 11.4–12.6 V @ 1 mA - precise avalanche onset threshold for predictable clamping initiation |
| Clamping Voltage (VC) | 16.7 V @ 90 A IPP - limits transient voltage seen by downstream circuitry during worst-case surge |
| Response Time | <1 ns - enables suppression before most ICs experience latch-up or gate oxide damage |
| ESD Rating | Class 3 (>16 kV HBM) - meets IEC 61000-4-2 Level 4 for system-level ESD immunity |
| UL Recognition | UL 497B (QVGQ2) - certified for isolated loop circuit protection in telecom and industrial interfaces |
Pinout & Package
1.5KE12ARL4 uses an axial-leaded CASE 41A plastic package (Surmetic) with cathode indicated by a colored band. Leads are tin-plated, solderable at 260°C for 10 seconds at 1/16″ from case. Mounting position is unrestricted.
| 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., DC input, signal trace); polarity band identifies this pin |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W surge rating | Handles 8.3 ms half-sine surges up to 90 A without degradation - suitable for IEC 61000-4-5 Level 4 (4 kV/2 Ω) |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on protected ICs - critical for 12 V rail systems with tight VMAX margins |
| Sub-1 ns response | Activates before propagation delay of most interface ICs - prevents pre-clamp damage in high-speed lines |
| Pb-free axial package (RL4 suffix) | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level not applicable (non-MOS) |
| UL 497B certification | Validated for use in primary-side isolated circuits including PoE injectors and RS-485 field wiring |
Applications
| Industrial Power Supply Input Protection | Medical Equipment ESD Shielding |
|---|---|
Use Scenario: 12 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input terminals to clamp transients before they reach upstream rectifier and downstream DC-DC controller. Use Value: 16.7 V clamping voltage ensures <1 V overvoltage margin relative to 15 V-rated input capacitors and 12 V-rated controller ICs. |
Use Scenario: Patient-connected analog front-end (AFE) inputs in ECG monitor subjected to human-body-model ESD events. IC Role / Device Role / Timing Role: First-line protection element shunting ESD current away from precision op-amps and ADC inputs. Use Value: Class 3 HBM rating (>16 kV) and <1 ns response prevent latch-up in rail-to-rail input amplifiers operating at ±5 V. |
| Telecom Isolated Loop Interface | Automotive Body Control Module (BCM) Inputs |
Use Scenario: 24 V isolated RS-485 transceiver bus line in building automation system with long cable runs. IC Role / Device Role / Timing Role: UL 497B-certified TVS installed at physical layer interface to meet safety isolation requirements while suppressing induced surges. Use Value: Recognized under UL 497B QVGQ2 confirms suitability for secondary-circuit protection in SELV/PELV systems. |
Use Scenario: 12 V sensor input (e.g., door switch, rain sensor) in BCM exposed to ISO 7637-2 pulse 1 and pulse 3a transients. IC Role / Device Role / Timing Role: Primary transient suppressor on low-voltage digital input traces routed through vehicle harnesses. Use Value: 1500 W rating withstands 100 V/50 Ω pulse 1 (−100 V, 50 ms) with minimal voltage overshoot due to low dynamic impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | 600 W rating, SMC package, 13.3 V VC @ 43.5 A IPP | Lower surge capacity; suited for PCB space-constrained designs where 1500 W is not required | Select SMBJ12A only if peak transient energy is ≤600 W and board layout favors surface-mount |
| 1.5KE12A | Identical electrical specs but in bulk box packaging (AG suffix), no tape-and-reel | No functional difference; differs only in logistics format and lead finish consistency | Choose 1.5KE12A for manual assembly or low-volume prototyping where reel handling is unnecessary |
Compared with SMBJ12A and 1.5KE12A, the 1.5KE12ARL4 provides identical clamping performance and surge rating in Pb-free tape-and-reel format optimized for automated SMT placement - making it the preferred choice for high-volume production requiring RoHS compliance and consistent lead finish.
Availability
1.5KE12ARL4 is available at Aetrix Electronics and suitable for industrial power supply input protection, medical equipment ESD shielding, telecom isolated loop interface, and automotive body control module inputs requiring stable component supply and full traceability.
Supply support for 1.5KE12ARL4 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, sensors, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The 1.5KE12ARL4 belongs to the 1.5KE series of Mosorb™ TVS diodes - engineered specifically for high-power transient suppression in harsh environments where reliability, UL recognition, and repeatable clamping performance are mandatory.
FAQ
What is the maximum clamping voltage of the 1.5KE12ARL4 under standard test conditions?
The 1.5KE12ARL4 has a maximum clamping voltage (VC) of 16.7 V when subjected to its rated peak pulse current of 90 A (1 ms exponential decay waveform per Figure 5). This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during worst-case transient events - critical for ensuring compatibility with 12 V system rails and associated IC voltage tolerances.
Is the 1.5KE12ARL4 RoHS compliant and what does the "RL4" suffix indicate?
Yes, the 1.5KE12ARL4 is RoHS compliant. The "RL4" suffix denotes a Pb-free axial leaded package in tape-and-reel format (1500 units per reel), conforming to JEDEC standards and ON Semiconductor's Surmetic molding process. Lead finish is matte tin, qualified per J-STD-002 and J-STD-003, with no exemption required under Directive 2011/65/EU.
Does the 1.5KE12ARL4 have UL recognition and for which standard?
Yes, the 1.5KE12ARL4 carries UL 497B recognition under file #E210057, category QVGQ2, specifically for isolated loop circuit protection. This certification covers dielectric withstand, endurance conditioning, and strike voltage breakdown testing - confirming suitability for use in telecom interfaces, PoE-powered devices, and other safety-isolated applications where regulatory approval is mandatory.
How does the 1.5KE12ARL4 differ from the 1.5KE12A variant?
The 1.5KE12ARL4 and 1.5KE12A share identical electrical specifications, package dimensions (CASE 41A), and thermal characteristics. The sole difference is packaging: 1.5KE12ARL4 is supplied in Pb-free tape-and-reel (1500 units), while 1.5KE12A is in bulk box (500 units) with identical lead finish. Both meet the same UL 497B and RoHS requirements.
What is the working peak reverse voltage (VRWM) of the 1.5KE12ARL4 and why is it important for circuit design?
The 1.5KE12ARL4 has a VRWM of 10.2 V - the maximum continuous DC or peak AC voltage at which reverse leakage remains ≤5 µA. This parameter is essential for selecting appropriate standoff voltage: VRWM must exceed the normal operating voltage of the protected line (e.g., 12 V rail) to avoid conduction during steady-state operation, while remaining low enough to ensure timely clamping during transients.
1.5KE12ARL4 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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 90A
- 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
1.5KE12ARL4 FAQ
1.How can I place an order for 1.5KE12ARL4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE12ARL4 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 1.5KE12ARL4 reliable?
The price and inventory of 1.5KE12ARL4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE12ARL4 is usually 5 days.
3.What payment methods are accepted for 1.5KE12ARL4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE12ARL4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE12ARL4?
1.5KE12ARL4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE12ARL4 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 1.5KE12ARL4?
For technical support, including 1.5KE12ARL4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE12ARL4 requirements.
6.How does Aetrix verify that 1.5KE12ARL4 is sourced from the original manufacturer or authorized distributors?
All 1.5KE12ARL4 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 1.5KE12ARL4 meets industry standards.
7.What is the process for return or replacement of 1.5KE12ARL4?
All 1.5KE12ARL4 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE12ARL4, 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 1.5KE12ARL4 part is unused and in its original packaging.
Return procedure for 1.5KE12ARL4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE12ARL4 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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DESD5V0U1BA-7
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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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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