My Inquiry
My Account
onsemi 1.5KE22ARL4
- Part No.:
- 1.5KE22ARL4
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1.5KE22ARL4.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,515
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE22ARL4 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 18.8 V working peak reverse voltage (VRWM), 22 V nominal breakdown voltage (VBR), 33.2 V maximum clamping voltage (VC) at 45 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 1.5KE22ARL4 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 1 ms pulse, 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 (20.9–23.1 V at 1 mA test current). Its Surmetic axial-leaded plastic package (Case 41A) provides thermal resistance of 20°C/W junction-to-lead and supports 260°C soldering at 10 s duration.
Clamping performance is defined per non-repetitive 1 ms exponential pulse (Figure 5), with peak power derated above 25°C ambient and lead temperature >75°C. It meets Class 3 ESD immunity (>16 kV HBM) and UL 497B certification for isolated loop protection - critical for analog front-ends and fieldbus interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 18.8 V - maximum continuous reverse operating voltage; must exceed system DC rail (e.g., 15 V or 18 V supplies) to avoid leakage-induced power loss |
| VBR @ IT = 1 mA | 20.9–23.1 V - breakdown threshold range; ensures reliable turn-on before protected circuit exceeds safe voltage limits |
| VC @ IPP = 45 A | 33.2 V - clamped voltage during 1 ms surge; defines worst-case overvoltage seen by downstream ICs |
| PPK | 1500 W - peak pulse power handling; validates robustness against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges |
| IR @ VRWM | 5 μA max - ultra-low reverse leakage; prevents measurable current draw in standby or battery-backed systems |
| Response Time | <1 ns - enables suppression before fast-edge transients (e.g., relay bounce, MOSFET switching noise) propagate into signal paths |
| UL Recognition | UL 497B QVGQ2 - certified for use in isolated communication loops (e.g., RS-485, CAN, Profibus) requiring safety-rated surge protection |
Pinout & Package
1.5KE22ARL4 uses an axial-leaded Surmetic plastic package (Case 41A), with cathode identified by a polarity band. Leads are tin-plated, solderable, and rated for 260°C for 10 seconds at 1/16 inch from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground-reference terminal | Connected to system ground or low-side return path; establishes reference for clamping action |
| Cathode | Protected-line terminal | Connected to line being protected (e.g., +15 V rail); conducts surge current to ground when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Supports IEC 61000-4-5 4 kV surge testing without degradation, enabling single-device protection for 24 V industrial buses |
| UL 497B certification | Validates suitability for safety-critical isolated loop circuits - eliminates need for additional certification effort in medical or process control designs |
| Class 3 ESD immunity | Withstands >16 kV human-body-model discharge, protecting against handling and operational electrostatic events in factory environments |
| Low zener impedance | Ensures stable clamping across varying surge currents - critical for consistent protection of precision ADCs and op-amps |
| Pb-free axial package | Complies with RoHS Directive 2011/65/EU; compatible with standard wave and reflow soldering processes without lead contamination risk |
Applications
| Industrial Power Supply Input Protection | RS-485 Communication Line Protection |
|---|---|
Use Scenario: 24 V DC input stage of PLC power module exposed to load dump and inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between +24 V rail and chassis ground, activated within <1 ns upon overvoltage detection. Use Value: Limits transient voltage to ≤33.2 V, preventing damage to upstream DC-DC controller ICs rated for 36 V absolute maximum. | Use Scenario: Differential pair (A/B) of industrial RS-485 transceiver connected to long cable runs in factory automation. IC Role / Device Role / Timing Role: Paired TVS devices (one per line) referenced to signal ground, suppressing common-mode surges induced by nearby motor drives. Use Value: UL 497B recognition ensures compliance with isolation barrier requirements, avoiding certification delays in safety-certified equipment. |
| Medical Equipment AC/DC Adapter Interface | Automotive Aftermarket Diagnostic Port (OBD-II) |
Use Scenario: Secondary-side output of medical-grade AC/DC adapter supplying 12 V to patient-monitoring sensors. IC Role / Device Role / Timing Role: Standoff TVS on 12 V output rail, absorbing ESD events from user-accessible connectors and board-level coupling. Use Value: 5 μA max leakage at 18.8 V VRWM avoids battery drain in portable units; Class 3 ESD rating covers clinical handling conditions. | Use Scenario: OBD-II data link connector exposed to vehicle battery transients and jump-start spikes in aftermarket scan tools. IC Role / Device Role / Timing Role: Bidirectional protection implemented using two 1.5KE22ARL4 devices (anode-to-anode) on CAN_H/CAN_L lines. Use Value: 1500 W surge rating withstands ISO 7637-2 Pulse 1/2/5a events; axial package allows manual repair and high-reliability through-hole mounting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | Surface-mount SMB package; 600 W PPK; 35.5 V VC @ 24.7 A IPP | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 without parallel staging | Select when board space is constrained and surge threat level is ≤2 kV; requires PCB layout revision |
| 1.5KE22A | Same electrical specs and Case 41A package; differs only in packaging - bulk box (500 pcs) vs. tape-and-reel (1500 pcs) | No functional or application difference; identical placement, soldering, and protection behavior | Select for prototyping or low-volume builds where reel feeding is unnecessary |
Compared with SMBJ22A, 1.5KE22ARL4 delivers 2.5× higher surge power and proven UL 497B compliance for isolated loops; versus 1.5KE22A, it offers identical protection performance with automated assembly compatibility via tape-and-reel delivery.
Availability
1.5KE22ARL4 is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 communication interfaces, medical AC/DC adapters, and automotive diagnostic ports requiring stable component supply and full regulatory traceability.
Supply support for 1.5KE22ARL4 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 logic solutions for automotive, industrial, cloud computing, and medical markets.
The 1.5KExxA Series belongs to ON Semiconductor's Mosorb transient voltage suppressor family, engineered specifically for high-reliability, high-power clamping in harsh electromagnetic environments - targeting industrial controls, telecom infrastructure, and safety-critical power systems.
FAQ
What is the clamping voltage of the 1.5KE22ARL4 under a 1 ms surge event?
The 1.5KE22ARL4 has a maximum clamping voltage (VC) of 33.2 V when subjected to its rated peak pulse current of 45 A under a 1 ms exponential waveform (per Figure 5 in the datasheet). This value represents the highest voltage the device allows across its terminals during surge conduction - a critical parameter for ensuring downstream ICs remain within their absolute maximum voltage ratings. The 1.5KE22ARL4 maintains this clamping performance consistently across its qualified temperature range (−65°C to +175°C).
Does the 1.5KE22ARL4 meet UL 497B certification?
Yes, the 1.5KE22ARL4 is UL 497B recognized (File #E210057, category QVGQ2) for isolated loop circuit protection. This certification confirms successful completion of tests including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge validation - making it suitable for safety-compliant designs such as RS-485, CAN, and Profibus interfaces where galvanic isolation integrity must be maintained during surge events. The 1.5KE22ARL4 carries this rating as part of the full 1.5KE6.8A–1.5KE250A series.
What is the working peak reverse voltage (VRWM) of the 1.5KE22ARL4, and why does it matter?
The 1.5KE22ARL4 has a VRWM of 18.8 V - the maximum continuous DC or repetitive peak reverse voltage it can block without significant leakage. This parameter is essential for proper selection: VRWM must be ≥ the normal operating voltage of the protected line (e.g., 15 V or 18 V rails) to prevent excessive standby current, yet low enough to ensure timely clamping before damage occurs. Exceeding VRWM risks thermal runaway; undershooting wastes clamping margin. The 1.5KE22ARL4's 18.8 V VRWM makes it ideal for 24 V systems with derating or 15–18 V regulated outputs.
Can the 1.5KE22ARL4 be used in bidirectional configurations?
The 1.5KE22ARL4 is a unidirectional TVS diode and is not inherently bidirectional. However, it can be configured for bidirectional protection by connecting two devices in series opposing (anode-to-anode), which creates symmetrical clamping for both positive and negative transients - commonly applied on differential buses like CAN or RS-485. In such arrangements, each 1.5KE22ARL4 handles one polarity, preserving its 33.2 V clamping performance per direction. This approach avoids the higher capacitance and lower surge rating typical of dedicated bidirectional TVS devices.
What is the maximum reverse leakage current of the 1.5KE22ARL4 at its VRWM?
The 1.5KE22ARL4 specifies a maximum reverse leakage current (IR) of 5 μA at its working peak reverse voltage of 18.8 V and TA = 25°C. This ultra-low leakage ensures minimal power loss in always-on or battery-powered systems, and avoids false triggering or voltage droop in high-impedance sensing nodes. Leakage remains well below 50 μA even at +125°C, supporting reliable operation in industrial temperature environments without compromising efficiency or signal integrity.
1.5KE22ARL4 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):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 49A
- 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
1.5KE22ARL4 FAQ
1.How can I place an order for 1.5KE22ARL4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE22ARL4 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 1.5KE22ARL4 reliable?
The price and inventory of 1.5KE22ARL4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE22ARL4 is usually 5 days.
3.What payment methods are accepted for 1.5KE22ARL4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE22ARL4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE22ARL4?
1.5KE22ARL4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE22ARL4 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 1.5KE22ARL4?
For technical support, including 1.5KE22ARL4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE22ARL4 requirements.
6.How does Aetrix verify that 1.5KE22ARL4 is sourced from the original manufacturer or authorized distributors?
All 1.5KE22ARL4 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 1.5KE22ARL4 meets industry standards.
7.What is the process for return or replacement of 1.5KE22ARL4?
All 1.5KE22ARL4 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE22ARL4, 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 1.5KE22ARL4 part is unused and in its original packaging.
Return procedure for 1.5KE22ARL4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE22ARL4 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
