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onsemi 1.5KE12ARL4G
- Part No.:
- 1.5KE12ARL4G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1.5KE12ARL4G.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:45,074
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Product details
Overview
1.5KE12ARL4G 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 <1 ns response time - deployed in power supplies, industrial controls, and medical equipment.
For engineers reviewing the 1.5KE12ARL4G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin over operating voltage, VC vs. protected IC's absolute maximum rating, surge current capability under IEC 61000-4-5 waveforms, and UL 497B recognition for isolated loop circuit compliance.
Technical Context
This TVS operates as a voltage-clamped shunt device: when reverse voltage exceeds VBR (~11.4–12.6 V), it avalanches into low-impedance conduction to divert transient energy away from downstream circuitry. Its 1500 W peak power rating applies to a non-repetitive 1 ms pulse per Figure 5, with thermal derating above 75°C lead temperature.
Clamping performance is defined by VC = 16.7 V at IPP = 90 A, ensuring robust protection for 12 V rail systems where protected ICs tolerate ≤20 V. The device exhibits low zener impedance and <5 µA leakage above 10 V, enabling minimal standby power impact in always-on applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 10.2 V - Maximum continuous reverse voltage before significant leakage; must exceed system DC/peak operating voltage. |
| VBR @ IT=1 mA | 11.4–12.6 V - Breakdown range defining turn-on threshold; ensures reliable clamping onset near 12 V rail. |
| VC @ IPP=90 A | 16.7 V - Clamped voltage during worst-case surge; must stay below protected IC's absolute max rating. |
| PPK | 1500 W @ 1 ms - Peak surge energy handling per IEC 61000-4-5; supports high-energy transients in industrial environments. |
| Response Time | <1 ns - Enables suppression before transient propagates through PCB traces; critical for protecting fast CMOS/MOS interfaces. |
| ESD Rating | Class 3 (>16 kV HBM) - Meets stringent electrostatic discharge immunity requirements for end-user accessible ports. |
| UL Recognition | UL 497B (QVGQ2) - Certified for isolated loop circuit protection; validates safety compliance in telecom and medical isolation barriers. |
Pinout & Package
1.5KE12ARL4G uses an axial-leaded Surmetic plastic package (Case 41A), with cathode indicated by a polarity band. Leads are tin-plated, solderable at 260°C for 10 seconds at 1/16″ from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink path | Connected to ground or low-impedance return; carries full IPP during clamping event. |
| Cathode | Protected circuit node connection | Connected to line/rail being protected; voltage referenced to anode during avalanche conduction. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Supports high-energy surges per IEC 61000-4-5 Level 4 without degradation - suitable for AC mains input stages and motor drive feedback lines. |
| Clamping ratio VC/VBR ≈ 1.4 | Low overvoltage margin ensures tight protection window - critical for 12 V logic rails with 16 V absolute max ratings. |
| UL 497B certification | Validates use in safety-critical isolated circuits (e.g., PoE injectors, medical sensor front-ends) without additional barrier validation. |
| Pb-free axial package (RL4G) | Complies with RoHS and J-STD-020 reflow profiles; enables direct replacement in legacy through-hole manufacturing lines. |
Applications
| Industrial Power Supply Input Protection | Medical Equipment ESD Shielding |
|---|---|
Use Scenario: Protecting AC-DC converter primary-side rectifier and control ICs from lightning-induced surges on 120/230 VAC inputs. IC Role / Device Role / Timing Role: Shunt clamping element placed across bulk capacitor or bridge rectifier output to clamp transients before they reach PWM controller. Use Value: 16.7 V clamping at 90 A prevents overvoltage damage to 12 V-rated supervisor ICs and gate drivers during 1.2/50 µs surge events. | Use Scenario: Safeguarding USB and analog sensor interfaces on patient monitors exposed to clinical ESD events (>15 kV). IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector entry point to absorb HBM discharges before reaching ADC front-end or microcontroller I/O. Use Value: Class 3 ESD rating and sub-1 ns response ensure signal integrity preservation and eliminate latch-up in precision analog paths. |
| Programmable Logic Controller I/O Protection | Automated Test Equipment Signal Line Guarding |
Use Scenario: Securing 24 V digital input channels in PLC modules against field-wiring transients and relay coil kickback. IC Role / Device Role / Timing Role: Unidirectional TVS connected between input terminal and common rail to clamp negative-going spikes from inductive loads. Use Value: 10.2 V VRWM allows reliable blocking of 24 V DC bias while clamping 1 kV ring waves to safe levels for optocoupler input stages. | Use Scenario: Protecting high-speed digital test channel outputs (e.g., JTAG, SPI) from accidental shorts and board-level ESD during probe contact. IC Role / Device Role / Timing Role: Fast-response TVS integrated into test fixture interface PCB to limit voltage overshoot during signal edge transitions. Use Value: 1500 W surge rating handles repetitive contact bounce energy without parametric shift - maintaining calibration stability over 100k+ test cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | Lower peak power (600 W), SMC package, 12.2 V VRWM, 19.9 V VC @ 30 A | Better suited for space-constrained PCBs; lower surge capacity limits use to secondary-side or low-energy signal lines. | Select SMBJ12A only when board area is constrained and surge threat level is limited to IEC 61000-4-2 Level 4. |
| 1N6267A | Same electrical specs and axial package; JEDEC-registered part number; identical VRWM, VBR, VC, and PPK ratings | No functional or mechanical difference - direct JEDEC-compliant alternative with same UL 497B recognition. | 1N6267A is a functionally identical, JEDEC-standardized version of 1.5KE12ARL4G with identical performance and footprint. |
Compared with SMBJ12A, 1.5KE12ARL4G delivers 2.5× higher surge energy handling for primary-side protection, while 1N6267A offers identical specifications in a JEDEC-mandated marking format - making it ideal for procurement traceability and standards-aligned BOMs.
Availability
1.5KE12ARL4G is available at Aetrix Electronics and suitable for industrial power supplies, medical diagnostic interfaces, programmable logic controllers, and automated test equipment requiring stable component supply and long-term obsolescence management.
Supply support for 1.5KE12ARL4G 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 is a global semiconductor supplier delivering energy-efficient, high-performance silicon solutions for automotive, industrial, cloud computing, and IoT applications.
The 1.5KE12ARL4G belongs to the Mosorb 1500 W TVS family, engineered specifically for high-energy transient suppression in harsh industrial and medical environments where reliability and safety certification are mandatory.
FAQ
What is the clamping voltage of the 1.5KE12ARL4G under maximum rated surge current?
The 1.5KE12ARL4G has a maximum clamping voltage (VC) of 16.7 V when subjected to its rated peak pulse current (IPP) of 90 A, measured using the standard 1 ms exponential waveform per Figure 5. This value is critical for verifying that protected components remain within their absolute maximum voltage ratings during surge events. The 1.5KE12ARL4G maintains this clamping performance across its specified operating temperature range.
Is the 1.5KE12ARL4G RoHS compliant and lead-free?
Yes, the "RL4G" suffix in 1.5KE12ARL4G explicitly denotes a Pb-free axial package compliant with RoHS Directive 2011/65/EU. The device uses tin-plated leads and meets J-STD-020 moisture sensitivity level (MSL) requirements for through-hole reflow. ON Semiconductor confirms full compliance documentation is available upon request for the 1.5KE12ARL4G.
How does the 1.5KE12ARL4G differ from bidirectional TVS diodes?
The 1.5KE12ARL4G is unidirectional and functions only under reverse-bias surge conditions - it blocks forward voltage like a standard diode but clamps reverse transients. Bidirectional variants (e.g., 1.5KE12A) conduct in both directions and are used where AC signals or bipolar transients occur. The 1.5KE12ARL4G is optimal for DC rail protection where polarity is fixed and forward conduction must be prevented.
Can the 1.5KE12ARL4G be used in place of a Zener diode for voltage regulation?
No - the 1.5KE12ARL4G is not designed for continuous voltage regulation. It is optimized for transient suppression with high peak power and low clamping impedance only during short-duration surges. Its leakage current and dynamic impedance are not characterized for steady-state operation, and sustained power dissipation beyond 5 W will cause thermal failure. Use dedicated Zener regulators (e.g., 1N4742A) for DC voltage reference applications.
What is the meaning of the "A" in the 1.5KE12ARL4G part number?
The "A" in 1.5KE12ARL4G indicates the device belongs to ON Semiconductor's preferred product line - signifying enhanced manufacturing consistency, extended lifecycle support, and qualification to stricter internal quality standards. This designation appears in the official ordering matrix and correlates with devices marked as "ON Semiconductor Preferred" in the datasheet's electrical characteristics table.
1.5KE12ARL4G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-201AD, Axial
- Series:
- Mosorb™
- Packaging:
- Bulk
- Product Status:
- Active
- 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
1.5KE12ARL4G FAQ
1.How can I place an order for 1.5KE12ARL4G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE12ARL4G 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 1.5KE12ARL4G reliable?
The price and inventory of 1.5KE12ARL4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE12ARL4G is usually 5 days.
3.What payment methods are accepted for 1.5KE12ARL4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE12ARL4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE12ARL4G?
1.5KE12ARL4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE12ARL4G 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 1.5KE12ARL4G?
For technical support, including 1.5KE12ARL4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE12ARL4G requirements.
6.How does Aetrix verify that 1.5KE12ARL4G is sourced from the original manufacturer or authorized distributors?
All 1.5KE12ARL4G 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 1.5KE12ARL4G meets industry standards.
7.What is the process for return or replacement of 1.5KE12ARL4G?
All 1.5KE12ARL4G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE12ARL4G, 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 1.5KE12ARL4G part is unused and in its original packaging.
Return procedure for 1.5KE12ARL4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE12ARL4G Tags
-
ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
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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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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