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onsemi 1.5KE20ARL4G
- Part No.:
- 1.5KE20ARL4G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1.5KE20ARL4G.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:13,500
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Product details
Overview
1.5KE20ARL4G 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 17.1 V working peak reverse voltage (VRWM), 20 V nominal breakdown voltage (VBR), 27.7 V maximum clamping voltage (VC) at 54 A peak pulse current (IPP), and sub-1 ns response time - deployed in power supplies, industrial controls, and medical equipment.
For engineers reviewing the 1.5KE20ARL4G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, VRWM compatibility with DC bus voltage, surge current handling under IEC 61000-4-5 waveforms, and axial-leaded Surmetic package thermal performance under sustained transient stress.
Technical Context
This device operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (~20 V), it avalanches into low-impedance conduction to divert transient energy away from downstream circuitry. Its 1500 W peak power rating applies to a standardized 1 ms non-repetitive 8.3 ms half-sine waveform per Figure 5, with derating above 25°C ambient or 75°C lead temperature.
Clamping behavior is defined by dynamic impedance (Zdynamic ≈ 0.5 Ω typical near VBR), enabling rapid voltage limiting during fast transients. The device exhibits <5 µA leakage at VRWM and a +0.09 %/°C VBR temperature coefficient - critical for stable protection across industrial temperature ranges (−65°C to +175°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 1 ms - handles IEC 61000-4-5 Level 4 surges (4 kV line-to-line) without failure |
| Working Peak Reverse Voltage (VRWM) | 17.1 V - must be ≥ continuous DC operating voltage to avoid leakage-induced heating |
| Breakdown Voltage (VBR) | 20 V (min–max: 19–21 V @ 1 mA) - defines precise avalanche onset threshold |
| Clamping Voltage (VC) | 27.7 V @ 54 A IPP - maximum voltage seen by protected load during worst-case transient |
| Leakage Current (IR) | <5 µA @ 17.1 V - ensures negligible standby power loss and signal integrity in high-impedance circuits |
| Response Time | <1 ns - limits voltage overshoot before clamping engages, critical for protecting fast CMOS/MOS interfaces |
| ESD Rating | Class 3 (>16 kV HBM) - meets IEC 61000-4-2 Level 4 for system-level ESD immunity |
Pinout & Package
1.5KE20ARL4G 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. Mounting position is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance reference plane; carries full IPP during clamping |
| Cathode | Protected circuit connection point | Connected to line being protected (e.g., +12 V rail); voltage referenced to anode during avalanche |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Qualified for isolated loop circuit protection - enables use in telecom and safety-critical industrial interfaces without additional certification effort |
| Pb-Free Axial Package | RoHS-compliant Surmetic Case 41A - supports automated through-hole assembly and eliminates lead-based solder compatibility concerns |
| Low Zener Impedance | Dynamic impedance ~0.5 Ω near VBR - minimizes voltage rise during high di/dt transients, improving clamping precision |
| High Surge Capability | Rated for 200 A forward surge (IFSM) - withstands repetitive inrush currents in AC/DC front-end applications |
Applications
| Industrial Power Supply Input Protection | Medical Equipment ESD Shielding |
|---|---|
Use Scenario: Protecting AC/DC converter input stages from lightning-induced surges on 24 V DC distribution lines in factory automation systems. IC Role / Device Role / Timing Role: Shunt TVS diode placed directly across input terminals, clamping transients before they reach rectifier bridge and bulk capacitor. Use Value: Limits voltage to ≤27.7 V during 54 A surges, preventing overvoltage damage to 35 V-rated electrolytic capacitors and MOSFET gate oxides. | Use Scenario: Safeguarding patient-connected analog front-ends (e.g., ECG leads) against electrostatic discharge during handling or cable contact. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at connector interface, referenced to isolated chassis ground to absorb HBM-type discharges. Use Value: Withstands >16 kV HBM per IEC 61000-4-2 while adding <1 pF capacitance - preserves signal fidelity in sub-100 µV biopotential measurements. |
| Programmable Logic Controller I/O Protection | Telecom Line Interface Surge Suppression |
Use Scenario: Securing 24 V digital input channels on PLC modules exposed to relay coil back-EMF and field wiring transients. IC Role / Device Role / Timing Role: TVS connected between input terminal and common return, activated only during overvoltage events exceeding 17.1 V. Use Value: Clamps induced spikes within 1 ns, preventing false triggering of optocouplers and latch-up in microcontroller GPIOs. | Use Scenario: Protecting RS-485 transceivers on building management system field buses from induced surges on long outdoor runs. IC Role / Device Role / Timing Role: Unidirectional TVS placed on differential pair (A/B lines), referenced to local ground plane per UL 497B isolated loop requirements. Use Value: UL 497B recognition validates compliance for telecom infrastructure; 1500 W rating covers IEC 61000-4-5 combination wave (10/700 µs) threats. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | Surface-mount SMB package; lower 600 W peak power; 20 V VBR; 32.4 V VC @ 18.5 A | Designed for PCB space-constrained designs; not suitable for same surge energy levels as 1.5KE20ARL4G | Select SMBJ20A only when board area is limited and peak surge current remains ≤18.5 A |
| 1.5KE20A | Same electrical specs and axial package but supplied in 500-unit boxes (not tape-and-reel); identical VRWM, VBR, VC, and IPP | No functional difference; differs only in packaging format and logistics handling | Choose 1.5KE20A for manual prototyping or low-volume production where tape-and-reel is unnecessary |
Compared with SMBJ20A and 1.5KE20A, the 1.5KE20ARL4G offers superior surge handling (54 A vs. 18.5 A) in a Pb-free tape-and-reel format optimized for high-volume automated assembly - making it the preferred choice for industrial power supply and PLC manufacturing where reliability under repeated transients is critical.
Availability
1.5KE20ARL4G is available at Aetrix Electronics and suitable for industrial power supplies, programmable logic controllers, medical diagnostic equipment, and telecom infrastructure requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE20ARL4G 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 manufacturer specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The 1.5KE20ARL4G belongs to the Mosorb 1.5KE series - engineered specifically for high-energy transient suppression in harsh industrial environments, with emphasis on robustness, UL certification, and axial-leaded thermal reliability.
FAQ
What is the clamping voltage of the 1.5KE20ARL4G under maximum surge conditions?
The 1.5KE20ARL4G has a maximum clamping voltage (VC) of 27.7 V when subjected to its rated peak pulse current of 54 A, measured using the standard 1 ms exponential waveform. This value ensures protected circuits remain below critical overvoltage thresholds during real-world transients such as lightning-induced surges or inductive load switching. The 1.5KE20ARL4G maintains this clamping performance across its full operating temperature range.
Is the 1.5KE20ARL4G RoHS compliant and lead-free?
Yes, the 1.5KE20ARL4G is a Pb-free device packaged in ON Semiconductor's Surmetic axial leaded housing (Case 41A). The "G" suffix explicitly denotes RoHS compliance, and the part meets JEDEC J-STD-020 moisture sensitivity level 1 requirements. Lead finish is matte tin, compatible with standard SnPb and lead-free soldering processes up to 260°C for 10 seconds.
How does the 1.5KE20ARL4G differ from the 1.5KE20A variant?
The 1.5KE20ARL4G and 1.5KE20A share identical electrical specifications, thermal characteristics, and mechanical dimensions. Their sole difference lies in packaging: the 1.5KE20ARL4G is supplied in 1500-unit tape-and-reel format optimized for automated SMT placement, whereas the 1.5KE20A comes in 500-unit boxes for manual or low-volume assembly. Both are Pb-free and UL 497B recognized.
Can the 1.5KE20ARL4G be used in bidirectional protection circuits?
No - the 1.5KE20ARL4G is a unidirectional TVS diode, designed only for clamping positive transients relative to its cathode. For bidirectional (AC or symmetrical) surge protection, a dedicated bidirectional device such as the 1.5KE20CA or SMAJ20CA must be used. Using the 1.5KE20ARL4G in reverse-biased configurations risks permanent damage due to lack of reverse avalanche capability.
What is the thermal resistance junction-to-lead for the 1.5KE20ARL4G?
The 1.5KE20ARL4G has a thermal resistance of 20°C/W from junction to lead (RJL), measured with 3/8″ lead length at TL ≤ 75°C. This value enables direct thermal modeling of power dissipation during repetitive transients and informs heatsinking decisions when used in high-duty-cycle applications. Derating begins above 75°C lead temperature at 20 mW/°C.
1.5KE20ARL4G 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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 54A
- 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
1.5KE20ARL4G FAQ
1.How can I place an order for 1.5KE20ARL4G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE20ARL4G 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 1.5KE20ARL4G reliable?
The price and inventory of 1.5KE20ARL4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE20ARL4G is usually 5 days.
3.What payment methods are accepted for 1.5KE20ARL4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE20ARL4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE20ARL4G?
1.5KE20ARL4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE20ARL4G 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 1.5KE20ARL4G?
For technical support, including 1.5KE20ARL4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE20ARL4G requirements.
6.How does Aetrix verify that 1.5KE20ARL4G is sourced from the original manufacturer or authorized distributors?
All 1.5KE20ARL4G 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 1.5KE20ARL4G meets industry standards.
7.What is the process for return or replacement of 1.5KE20ARL4G?
All 1.5KE20ARL4G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE20ARL4G, 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 1.5KE20ARL4G part is unused and in its original packaging.
Return procedure for 1.5KE20ARL4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE20ARL4G Tags
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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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