1W Zener Diodes, 1N47 Series and Assortment Kits
Collection scope: browse nominally 1 W Zener diode listings for voltage-reference and reverse-breakdown applications, especially 1N4727A–1N4764A / 1N47-series voltage selections and assorted kits. Most single-grade choices are advertised as axial through-hole parts, while some listings offer LL41 or SMA surface-mount choices. The collection also includes listings whose titles conflict on DO-35 versus DO-41 or 0.5 W versus 1 W. Treat “1W” as the collection's shopping theme, not a verified rating for every selected product.
What you can choose
- Single-voltage axial packs: common 1N47-family options include 1N4728A 3.3 V, 1N4733A 5.1 V, 1N4742A 12 V and 1N4751A 30 V. Separate listings include higher nominal-voltage selections such as 51, 56, 62, 68 and 75 V, and one menu reaches 100 V. A title listing several voltages is not a mixed pack when its variants select one grade. Pack sizes in this collection include 5, 10, 20, 50, 100 and larger quantity options; check the selected variant.
- Multi-value kits: selections include 7-value packs, 10 values × 20 pieces (200 total), 14 values × 10 (140), 15 values × 10 (150), 25 values × 10 (250), 30 values × 10 (300) and 30 values × 20 (600). A three-option kit listing changes both voltage range and total: 10 grades from 3.3–7.5 V, 14 from 3.3–24 V, or 25 from 3–33 V. Totals are across grades, not per voltage; check the actual grade list and count before ordering.
- Package alternatives: some options are marked DO-41 axial, others DO-35 in their titles, ZM47 / LL41 glass SMD, SML4733A or 1SMA47 in SMA. These are different assembly formats even at the same nominal voltage. One kit title mixes “1/2W” and “1W,” and a BZX55C assortment names a 0.5 W family; verify those separately rather than assuming 1 W capability.
Engineering and purchasing checklist
- Define the desired reverse-breakdown reference or limiting function and choose the exact nominal grade and suffix from the selected option. The nominal Zener voltage is specified at a test current, not a guaranteed output at every load.
- Compare the chosen part's datasheet for tolerance, test current, dynamic impedance, leakage, current range, maximum dissipation and temperature derating. Calculate worst-case current and power over supply, load and ambient limits; a listed 1 W value does not mean 1 W is safe under all board or lead conditions.
- Confirm axial body dimensions and lead spacing, or the LL41/SMA land pattern and cathode marking. Do not substitute DO-35, DO-41, LL41 and SMA solely by voltage.
- Put the exact part number, voltage, suffix, package, pack quantity and per-grade kit contents on the BOM. Imported descriptions sometimes assign voltages to current fields or disagree with the title; such entries are not independent evidence of ratings or certification.
Frequently asked questions
Are 1N4733A 5.1 V and 1N4742A 12 V interchangeable?
No. They are distinct nominal breakdown grades. Match the exact grade, test conditions and tolerance to the design.
Does “1W Zener diode” mean every item here is a 1 W DO-41 part?
No. Some listings specify DO-35, LL41, SMA or a conflicting 0.5 W description. Confirm the chosen device and datasheet before qualifying power or footprint.
Is a 600-piece 30-value kit 600 pieces of each grade?
No. The listed 30 × 20 format totals 600 across the voltage selections. Verify the actual grade list and counts for the chosen product.
Will a 12 V Zener directly regulate a supply to exactly 12 V?
No. Breakdown voltage depends on specified current, tolerance and temperature. A complete circuit must be designed and checked against the selected part's operating limits.
