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onsemi 1.5KE43ARL4
- Part No.:
- 1.5KE43ARL4
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1.5KE43ARL4.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,576
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Product details
Overview
1.5KE43ARL4 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 36.8 V working peak reverse voltage (VRWM), 43 V breakdown voltage (VBR) at 1 mA test current, and clamps to 59.3 V at 25.3 A peak pulse current (IPP), making it suitable for DC power rail protection in industrial power supplies and communication interfaces.
For engineers reviewing the 1.5KE43ARL4 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to protected IC VMAX, VRWM alignment with steady-state 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 (~43 V), it avalanches into low-impedance conduction, diverting transient energy away from downstream components. Its <1 ns response time ensures suppression before system-level damage occurs, and its 20 °C/W junction-to-lead thermal resistance supports reliable 1500 W pulse dissipation at TL ≤ 25°C.
The device complies with UL 497B for isolated loop circuit protection and meets Class 3 ESD immunity (>16 kV HBM). Its Surmetic plastic package (Case 41A) provides void-free molding, corrosion-resistant surfaces, and lead solderability at 260°C for 10 seconds - enabling robust through-hole assembly in high-reliability industrial environments.
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 | 36.8 V - maximum continuous DC/peak AC voltage before clamping initiates |
| Breakdown Voltage | 43 V @ 1 mA - precise avalanche onset threshold for predictable clamping |
| Clamping Voltage | 59.3 V @ 25.3 A IPP - maximum voltage seen by protected circuit during worst-case surge |
| Leakage Current | <5 µA @ 36.8 V - negligible standby power loss and signal integrity impact |
| Response Time | <1 ns - enables suppression before fast-rising transients propagate into ICs |
| ESD Rating | Class 3 (>16 kV HBM) - exceeds IEC 61000-4-2 Level 4 for system-level ESD robustness |
Pinout & Package
1.5KE43ARL4 uses an axial-leaded Surmetic plastic package (Case 41A), with cathode identified by a polarity band. Leads are tin-plated copper, rated for 260°C soldering at 1/16 in from case for 10 seconds. Mounting position is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance reference; completes clamping loop during avalanche |
| Cathode | Protected circuit connection point | Connected to line being protected (e.g., +12 V rail); voltage referenced to anode during clamping |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Validated for isolated loop circuit protection - satisfies safety certification requirements without additional external components |
| Low Zener Impedance | Enables tight clamping voltage control across varying surge currents - reduces overvoltage stress on downstream MOSFETs and regulators |
| Pb-Free Axial Package | RoHS-compliant Surmetic Case 41A construction - supports lead-free manufacturing and long-term supply chain compliance |
| High Surge Capability | Rated for 200 A non-repetitive forward surge (8.3 ms half-sine) - handles inrush and fault currents beyond typical TVS duty |
Applications
| Industrial Power Supply Protection | Telecom Line Interface |
|---|---|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and field wiring surges. IC Role / Device Role / Timing Role: Shunt clamping element placed directly across input terminals to limit transient voltage before DC-DC converter input. Use Value: Clamps 1500 W surges to ≤59.3 V, preserving 60 V-rated input capacitors and preventing overvoltage shutdown of primary-side controller. | Use Scenario: RS-485 data line termination in outdoor base station equipment subject to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Unidirectional TVS connected between differential pair and local ground to clamp positive-going line surges. Use Value: Sub-1 ns response prevents data corruption during fast transients; UL 497B rating validates use in telecom safety-isolated circuits. |
| Medical Equipment Input Stage | Automotive Aftermarket Diagnostic Port |
Use Scenario: 24 V auxiliary power input of portable ultrasound unit requiring IEC 60601-1 compliance for surge immunity. IC Role / Device Role / Timing Role: Primary overvoltage protector on main DC input, coordinated with upstream fuse and filter inductors. Use Value: 36.8 V VRWM matches nominal 24 V system with 50% headroom; 59.3 V clamping stays below 63 V max rating of downstream PMIC. | Use Scenario: OBD-II connector power line (pin 16) in vehicle diagnostic tool exposed to battery jump-start spikes and alternator load dump. IC Role / Device Role / Timing Role: Standalone TVS mounted at connector edge to absorb transients before entering microcontroller power domain. Use Value: 1500 W rating withstands ISO 7637-2 Pulse 5a (load dump); axial package allows direct PCB mounting near connector footprint. |
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 | Surface-mount SMB package; 600 W rating; 59.3 V clamping at 10.1 A IPP | Lower surge capacity; requires PCB layout change for SMT assembly | Select when board space is constrained and surge energy is ≤600 W |
| 1N6286AG | Same axial package and electrical specs; Pb-free but supplied in bulk box (500 units), not tape-and-reel | No functional difference; differs only in packaging format and reel compatibility | Select when automated pick-and-place is not required and cost-per-unit is prioritized |
Compared with SMBJ43A, 1.5KE43ARL4 delivers 2.5× higher surge energy handling in identical clamping voltage; compared with 1N6286AG, it offers identical protection performance with tape-and-reel delivery optimized for high-volume SMT production lines.
Availability
1.5KE43ARL4 is available at Aetrix Electronics and suitable for industrial power supplies, telecom infrastructure, medical equipment, and automotive diagnostic systems requiring stable component supply and UL-recognized transient protection.
Supply support for 1.5KE43ARL4 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 power management, analog, sensor, and discrete devices for automotive, industrial, and cloud power applications.
The 1.5KExxA series belongs to ON Semiconductor's Mosorb TVS family, engineered specifically for high-energy transient suppression in harsh environments where reliability, UL recognition, and repeatable clamping performance are critical.
FAQ
What is the clamping voltage of the 1.5KE43ARL4 under maximum surge conditions?
The 1.5KE43ARL4 clamps to 59.3 V at its rated peak pulse current of 25.3 A (1 ms exponential waveform per Figure 5). This value represents the maximum voltage imposed on the protected circuit during worst-case transient events and is measured with leads held at 25°C. The 1.5KE43ARL4 maintains this clamping performance across its specified operating temperature range of −65°C to +175°C, with minor derating above ambient.
Does the 1.5KE43ARL4 meet UL safety standards for industrial applications?
Yes, the 1.5KE43ARL4 carries UL 497B recognition (File #E210057, QVGQ2 category) for isolated loop circuit protection. This certification covers dielectric withstand, endurance conditioning, temperature cycling, and discharge testing - confirming suitability for safety-critical industrial and telecom applications where regulatory compliance is mandatory. The 1.5KE43ARL4 is explicitly included in the UL-recognized 1.5KE6.8A–1.5KE250A family.
How does the 1.5KE43ARL4 differ from the 1.5KE43A variant?
The 1.5KE43ARL4 is identical in electrical and thermal specifications to the 1.5KE43A but is supplied in 1500-unit tape-and-reel packaging optimized for automated assembly. The "RL4" suffix denotes Pb-free axial lead construction with RoHS-compliant plating and tape orientation per ON Semiconductor's BRD8011/D specification. The 1.5KE43A may refer to legacy bulk or box packaging formats without reel compatibility.
Can the 1.5KE43ARL4 be used in bidirectional protection configurations?
No, the 1.5KE43ARL4 is a unidirectional TVS diode and must be used with correct polarity: cathode toward the line being protected, anode to ground. For bidirectional surge suppression (e.g., AC lines or differential data pairs), a dedicated bidirectional device such as the 1.5KE43A (dual-diode configuration) or SMAJ43CA is required. Using 1.5KE43ARL4 in reverse bias beyond its 36.8 V VRWM risks premature conduction and unreliable clamping.
What is the thermal resistance and maximum junction temperature of the 1.5KE43ARL4?
The 1.5KE43ARL4 has a junction-to-lead thermal resistance (RJL) of 20°C/W and an operating junction temperature range of −65°C to +175°C. Its steady-state power dissipation is rated at 5.0 W at TL = 75°C, derating linearly above that temperature. These values enable reliable operation in enclosed industrial enclosures where lead temperature can exceed ambient - critical for sustained surge duty cycles in power supply designs using the 1.5KE43ARL4.
1.5KE43ARL4 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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 25.3A
- 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
1.5KE43ARL4 FAQ
1.How can I place an order for 1.5KE43ARL4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43ARL4 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 1.5KE43ARL4 reliable?
The price and inventory of 1.5KE43ARL4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE43ARL4 is usually 5 days.
3.What payment methods are accepted for 1.5KE43ARL4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43ARL4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43ARL4?
1.5KE43ARL4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43ARL4 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 1.5KE43ARL4?
For technical support, including 1.5KE43ARL4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43ARL4 requirements.
6.How does Aetrix verify that 1.5KE43ARL4 is sourced from the original manufacturer or authorized distributors?
All 1.5KE43ARL4 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 1.5KE43ARL4 meets industry standards.
7.What is the process for return or replacement of 1.5KE43ARL4?
All 1.5KE43ARL4 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43ARL4, 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 1.5KE43ARL4 part is unused and in its original packaging.
Return procedure for 1.5KE43ARL4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE43ARL4 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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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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Diodes Incorporated
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