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Description
XB4BV8B3Main Range of product Harmony XB4 Product or component type Pilot light Device short name XB4 Bezel material Chromium plated metal Fixing collar material Zamak Head type Standard Mounting diameter 22 mm Sale per indivisible quantity 1 Shape of signaling unit head Round Cap operator or lens colour Green Operator additional information With plain lens Light source Protected LED Bulb base Integral LED Light block supply Via transformer 1. 2 VA 24 V Light
Main
| Range of product | Harmony XB4 |
| Product or component type | Pilot light |
| Device short name | XB4 |
| Bezel material | Chromium plated metal |
| Fixing collar material | Zamak |
| Head type | Standard |
| Mounting diameter | 22 mm |
| Sale per indivisible quantity | 1 |
| Shape of signaling unit head | Round |
| Cap/operator or lens colour | Green |
| Operator additional information | With plain lens |
| Light source | Protected LED |
| Bulb base | Integral LED |
| Light block supply | Via transformer 1.2 VA 24 V |
| Light source colour | Green |
| [Us] rated supply voltage | 440...460 V AC at 60 Hz |
Complementary
| CAD overall width | 40 mm |
| CAD overall height | 47 mm |
| CAD overall depth | 90 mm |
| Net weight | 0.172 kg |
| Resistance to high pressure washer | 7000000 Pa at 55 °C, distance : 0.1 m |
| Connections - terminals | Screw clamp terminals, <= 2 x 1.5 mm² with cable end conforming to EN/IEC 60947-1 Screw clamp terminals, 1 x 0.22...2 x 2.5 mm² without cable end conforming to EN/IEC 60947-1 |
| [Ui] rated insulation voltage | 600 V (pollution degree 3) conforming to EN/IEC 60947-1 |
| Signalling type | Steady |
| Supply voltage limits | 441…459 V AC |
| Service life | 100000 h at rated voltage and 25 °C |
| Surge withstand | 1 kV conforming to IEC 61000-4-5 |
| Device presentation | Complete product |
Environment
| Protective treatment | TH |
| Ambient air temperature for storage | -40…70 °C |
| Ambient air temperature for operation | -40…70 °C |
| Electrical shock protection class | Class I conforming to IEC 60536 |
| IP degree of protection | IP66 conforming to IEC 60529 IP67 IP69 IP69K |
| NEMA degree of protection | NEMA 13 NEMA 4X |
| IK degree of protection | IK06 conforming to IEC 50102 |
| Standards | EN/IEC 60947-5-1 EN/IEC 60947-5-5 UL 508 EN/IEC 60947-5-4 EN/IEC 60947-1 CSA C22.2 No 14 JIS C8201-5-1 JIS C8201-1 |
| Product certifications | UL listed CSA |
| Vibration resistance | 2 gn (f= 12…500 Hz) conforming to IEC 60068-2-6 |
| Shock resistance | 15 gn (duration = 11 ms) for half sine wave acceleration conforming to IEC 60068-2-27 |
| Resistance to fast transients | 2 kV conforming to IEC 61000-4-4 |
| Resistance to electromagnetic fields | 10 V/m conforming to IEC 61000-4-3 |
| Resistance to electrostatic discharge | 6 kV on contact (on metal parts) conforming to IEC 61000-4-2 8 kV in free air (in insulating parts) conforming to IEC 61000-4-2 |
| Electromagnetic emission | Class B conforming to IEC 55011 |
Offer Sustainability
| Sustainable offer status | Green Premium product |
| REACh Regulation | REACh Declaration |
| EU RoHS Directive | Pro-active compliance (Product out of EU RoHS legal scope) EU RoHS Declaration |
| Mercury free | Yes |
| RoHS exemption information | Yes |
| China RoHS Regulation | China RoHS declaration |
| Environmental Disclosure | Product Environmental Profile |
| Circularity Profile | End of Life Information |
| WEEE | The product must be disposed on European Union markets following specific waste collection and never end up in rubbish bins |
Contractual warranty
| Warranty | 18 months |
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- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
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4.8 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 5
A very good study book
Format: Paperback
A very good study book for NCLEX. It is to the point making it easy to understand. I used it in addition to Mark K notes and audio and passed my NCLEX in the first try, and i did only minimum questions. I never used anything else to study.
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Reviewed in the United States on March 8, 2026
★★★★★ 5
Great Book for Studying to Take the NCLEX
Format: Paperback
Excellent!
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Easy to study and understand
Format: Paperback
This book is easy to read and i tend to recall information better after reading it. It breaks down topics and focused on the important information or a must to know for NCLEX. I will recommend this book to anyone taking NCLEX.
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Reviewed in the United States on January 9, 2026
★★★★★ 4
Great book!
Format: Paperback, Format: Paperback
I am still in nursing school- but I like to try read and gain knowledge ahead of time. I do this so that with upcoming semesters, the concepts are not completely foreign to me and I’m not blindsided by new topics. I have been following a lot of the YouTube videos with Mark and Dr. Sharon and have found them very educational even while in nursing school. I purchased this book and I really am happy with it. I was hoping it would have offer more info in it , maybe some more facts here and there but it’s basically an answer bank. It does have some small facts but they are not in depth at all- just mainly recall information. It really is based off just past memory from your education. For me personally, I find this book pretty useful to have if you feel confident in all topics- and plan to go for your NCLEX..however, if you’re still a bit rusty on some topics, you won’t really be able to rely solely on this book to brush up on information- not in a manner of depth (which I guess is the point). I think applying his lectures, listening to their YouTube videos and applying this book would make the ultimate go-to. The book alone is wonderful- but it’s simply just answer banks to help recall the info. Which is great if you’re looking for strictly recall.
I was fortunate enough to find his lectures on Reddit along with some of the “yellow pages” from other students. I can apply that with this book and be confident in upcoming tests , as his lectures are incredible.
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Reviewed in the United States on April 28, 2026
★★★★★ 5
The Blue Book
Format: Paperback
I am sooooooo happy I bought this book!! It breaks down nursing into easy understandable language. Certain things I was struggling with like ABG’s and acid base balance, this book makes it easy to understand. Thank you Mark Klimek!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026