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onsemi 1.5KE27ARL4
- Part No.:
- 1.5KE27ARL4
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1.5KE27ARL4.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:8,560
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Product details
Overview
1.5KE27ARL4 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 23.1 V working peak reverse voltage (VRWM), 27 V nominal breakdown voltage (VBR), 37.5 V maximum clamping voltage (VC) at 40 A peak pulse current (IPP), and sub-1 ns response time - deployed in power supply input stages, industrial I/O interfaces, and telecom line cards.
For engineers reviewing the 1.5KE27ARL4 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, VRWM alignment with DC bus voltage, surge current capability under 8.3 ms waveform, and UL 497B recognition for isolated loop circuit compliance.
Technical Context
This device operates as a silicon avalanche diode in reverse-biased mode, entering low-impedance conduction when transient voltage exceeds VBR (25.7–28.4 V at 1 mA). Its clamping action limits downstream voltage to ≤37.5 V during 40 A 8.3 ms surges, with thermal resistance of 20 °C/W enabling reliable power dissipation under repetitive stress.
Designed for axial-leaded mounting in CASE 41A (Surmetic) plastic package, it delivers Class 3 ESD immunity (>16 kV HBM), <5 µA leakage above 10 V, and stable temperature coefficient (0.096 %/°C) - supporting robust protection in environments with ambient temperatures from −65 °C to +175 °C.
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 (VRWM) | 23.1 V - sets minimum DC operating voltage threshold before leakage rises |
| Breakdown Voltage (VBR) | 25.7–28.4 V @ 1 mA - defines precise avalanche onset for predictable clamping |
| Clamping Voltage (VC) | 37.5 V @ 40 A IPP - ensures protected ICs see no more than this voltage during surge |
| Response Time | <1 ns - enables suppression before most logic or analog circuits are damaged |
| Leakage Current (IR) | <5 µA @ 23.1 V - minimizes standby power loss and signal path loading |
| ESD Rating | Class 3 (>16 kV HBM) - meets stringent electrostatic discharge immunity requirements |
Pinout & Package
1.5KE27ARL4 is housed in an axial-leaded Surmetic plastic package (CASE 41A), with cathode identified by a polarity band. Leads are tin-plated, solderable at 260 °C for 10 seconds at 1/16 inch from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance reference plane; carries full surge current back to source |
| Cathode | Clamped voltage node | Connected to protected line; maintains voltage ≤37.5 V during 40 A surge events |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Validated for isolated loop circuit protection - satisfies safety-critical telecom and industrial interface standards |
| Pb-Free Axial Lead Package | RoHS-compliant CASE 41A construction with corrosion-resistant finish and controlled lead temperature tolerance |
| Low Zener Impedance | Enables tight clamping with minimal voltage overshoot during fast-rising transients |
| High Surge Capability | Rated for 200 A non-repetitive forward surge (8.3 ms half-sine), supporting robust system-level surge immunity |
Applications
| Industrial PLC I/O Protection | AC/DC Power Supply Input Stage |
|---|---|
Use Scenario: Protecting 24 V DC digital input modules in programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input terminal and common rail to clamp transients before they reach optocoupler or Schmitt trigger inputs. Use Value: Limits voltage to ≤37.5 V during 40 A surges, preserving input stage integrity while maintaining compatibility with 24 V nominal operation and 30 V max ratings. | Use Scenario: Safeguarding bridge rectifier outputs and bulk capacitor charging paths in offline switch-mode power supplies. IC Role / Device Role / Timing Role: Parallel-connected TVS on DC bus to absorb line-to-ground surges and reduce stress on electrolytic capacitors and MOSFETs. Use Value: Clamps 1500 W transients within 1 ns, preventing overvoltage failure of downstream components rated for ≤40 V DC bus operation. |
| Telecom Line Card Interface | Medical Equipment Signal Lines |
Use Scenario: Shielding RS-485 transceivers and isolation transformers on telecom base station line cards from lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional 1.5KE27ARL4 used on powered side (VCC or bias rail) where polarity is fixed. Use Value: UL 497B certification ensures compliance with telecom safety standards for isolated loop protection, reducing design validation effort. | Use Scenario: Guarding analog sensor inputs (e.g., ECG front-end amplifiers) against ESD events during clinical handling or cable coupling. IC Role / Device Role / Timing Role: Low-leakage (<5 µA) TVS placed at connector entry point to shunt human-body-model discharges without affecting baseline signal integrity. Use Value: Sub-1 ns response and Class 3 HBM rating prevent latch-up or parametric shift in precision analog ICs operating near 24 V rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Surface-mount SMB package; 24 V VRWM; 38.9 V VC @ 38.8 A; lower peak power (600 W) | Requires PCB redesign for SMT layout; suited for space-constrained consumer designs, not high-energy industrial surges | Select when board area is limited and surge energy remains below 600 W; verify thermal pad design for sustained dissipation |
| 1.5KE27A | Same electrical specs and CASE 41A package; differs only in packaging format (bulk vs. tape-and-reel) | No functional or layout impact; identical performance and mounting | Choose for manual assembly or low-volume prototyping where reel feeding is unnecessary |
Compared with SMBJ24A and 1.5KE27A, the 1.5KE27ARL4 offers tape-and-reel delivery for automated placement while retaining full 1500 W surge capacity and UL 497B certification - making it optimal for high-reliability industrial production where both throughput and compliance matter.
Availability
1.5KE27ARL4 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, AC/DC power supply input staging, and telecom line card interface applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1.5KE27ARL4 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, sensors, and discrete devices for automotive, industrial, and cloud power applications.
The 1.5KE27ARL4 belongs to the 1.5KE series of Mosorb transient voltage suppressors - engineered specifically for high-energy, high-reliability clamping in harsh industrial and telecom environments where UL recognition and surge endurance are mandatory.
FAQ
What is the clamping voltage of the 1.5KE27ARL4 under maximum surge conditions?
The 1.5KE27ARL4 has a maximum clamping voltage (VC) of 37.5 V when subjected to its rated peak pulse current of 40 A, measured using the standard 8.3 ms half-sine waveform. This value ensures that protected circuits experience no more than 37.5 V during transient events, provided layout inductance is minimized. The 1.5KE27ARL4 achieves this clamping performance with sub-1 ns response time and low dynamic impedance.
Does the 1.5KE27ARL4 meet UL safety standards for circuit protection?
Yes, the 1.5KE27ARL4 is UL Recognized under standard UL 497B for isolated loop circuit protection (File #E210057, QVGQ2 category). This certification covers tests including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance - confirming suitability for safety-critical telecom and industrial interfaces. The 1.5KE27ARL4 shares this recognition with the full 1.5KE6.8A–1.5KE250A family.
What is the difference between 1.5KE27ARL4 and 1.5KE27A?
The 1.5KE27ARL4 and 1.5KE27A share identical electrical specifications, thermal characteristics, and CASE 41A axial package dimensions. Their sole difference is packaging format: 1.5KE27ARL4 is supplied in 1500-unit tape-and-reel for automated assembly, whereas 1.5KE27A is offered in 500-unit bulk boxes. Both are Pb-free and fully interchangeable electrically and mechanically.
Can the 1.5KE27ARL4 be used in bidirectional protection configurations?
No, the 1.5KE27ARL4 is a unidirectional TVS diode and must be used with correct polarity - cathode connected to the line being protected, anode to ground. For bidirectional protection, two 1.5KE27ARL4 devices may be connected in series opposing configuration, but this increases capacitance and requires careful layout. Standard bidirectional alternatives like P6KE27CA are recommended instead.
What is the maximum steady-state power dissipation for the 1.5KE27ARL4 at 75°C lead temperature?
The 1.5KE27ARL4 has a steady-state power dissipation (PD) rating of 5.0 W at TL = 75°C with 3/8-inch lead length. Above 75°C, it derates linearly at 20 mW/°C. This rating applies to continuous DC or low-frequency leakage conditions - not transient suppression. The 1.5KE27ARL4 relies on its 1500 W peak pulse rating for surge handling, not steady-state dissipation.
1.5KE27ARL4 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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 40A
- 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
1.5KE27ARL4 FAQ
1.How can I place an order for 1.5KE27ARL4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE27ARL4 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 1.5KE27ARL4 reliable?
The price and inventory of 1.5KE27ARL4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE27ARL4 is usually 5 days.
3.What payment methods are accepted for 1.5KE27ARL4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE27ARL4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE27ARL4?
1.5KE27ARL4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE27ARL4 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 1.5KE27ARL4?
For technical support, including 1.5KE27ARL4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE27ARL4 requirements.
6.How does Aetrix verify that 1.5KE27ARL4 is sourced from the original manufacturer or authorized distributors?
All 1.5KE27ARL4 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 1.5KE27ARL4 meets industry standards.
7.What is the process for return or replacement of 1.5KE27ARL4?
All 1.5KE27ARL4 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE27ARL4, 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 1.5KE27ARL4 part is unused and in its original packaging.
Return procedure for 1.5KE27ARL4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE27ARL4 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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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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