Product Overview
A 130 Volt Line Varistor Wearing the LA-Series Numbers
Condition
New old stock (NOS), unused. The photographed sample is a black coated disc on two long radial leads, printed in white on one face with Zenamic, Z130LA10A and 5 K. The printing is crisp and fully legible in the photos. The leads are bright metal at full untrimmed length, with no solder, no bends and no cut marks. No marking is visible on the reverse face in these photos. Three pieces are on the shelf and the photographed one is representative of that stock; it is sold each, so the buyer receives one varistor.
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Product Overview
This is a radial leaded metal oxide varistor (MOV), the part you put across an AC line so a surge lands on the varistor instead of on everything behind it. The body is printed Zenamic with the ordering number Z130LA10A, and Z130LA10A is a direct cross of the V130LA10A from the LA series originally published by General Electric, then Harris Semiconductor, and today by Littelfuse. The two numbers agree on every published figure we could compare: 130 V AC RMS maximum continuous operating voltage, 170 V DC, varistor voltage 200 V nominal at 1 mA with a 185 V to 225 V window, maximum clamping voltage 340 V, peak surge current 4500 A on an 8/20 microsecond pulse, 38 joules of energy absorption and typical capacitance around 1000 pF. Those ratings are the published CKE and HVCA figures for Z130LA10A, corroborated against the Littelfuse LA datasheet for the V130LA10A cross, not measurements we took. Against an inch rule the coated body measures approximately 0.65 inch, about 16.5 mm across, which is what a 14 mm disc looks like under a coating; the 14 mm size class belongs to the LA-series cross, and no disc diameter is published for the Z number itself. The third line of printing reads 5 K. We can only report that it is marked 5 K - it is not a resistance, a tolerance or a rating that we can place.
Key Features
- Radial leaded metal oxide varistor, printed Zenamic Z130LA10A on the body
- 130 V AC RMS maximum continuous operating voltage, 170 V DC
- Varistor voltage 200 V nominal at 1 mA, 185 V to 225 V
- Maximum clamping voltage 340 V
- Peak surge current 4500 A, 8/20 microsecond pulse
- Energy rating 38 joules, typical capacitance 1000 pF
- Direct cross-reference for the GE / Harris / Littelfuse V130LA10A
- Unused NOS, long untrimmed radial leads, sold each
Applications
- A repair tech rebuilding the input section of a 120 V AC line powered supply and wanting the surge clamp back in place before power-up.
- A restorer bringing a piece of older line-powered test gear back to service, matching an original LA-series varistor by its published numbers rather than guessing at a modern substitute.
- A controls builder adding transient protection across the incoming line of a small panel or motor starter.
- A bench experimenter who needs one or two 130 V AC class MOVs for a prototype and does not want a bag of a hundred.
Frequently Asked Questions
What does Z130LA10A cross to?
V130LA10A, the LA-series radial leaded varistor that General Electric started, Harris Semiconductor carried, and Littelfuse publishes today. The part number grammar matches straight across: 130 is the AC RMS voltage rating, LA is the line-voltage radial series, 10 is the energy and size class, A is the revision. Every published rating we could compare between the two numbers agrees.
Is Zenamic the same company as CKE or Semitec?
Not established, and we will not pretend otherwise. The body says Zenamic. CKE, Inc. publishes the Z130LA10A part number and HVCA distributes that documentation. Semitec also uses the Zenamic name for metal oxide varistors, but on a completely different ZnnD numbering that does not include this part. We found no source tying the three together, so we quote the published Z130LA10A figures and leave the corporate question open.
What does the 5 K on the body mean?
Not confirmed. It is the third printed line under the part number and its meaning is not established. We report it as marked 5 K and nothing more.
What is not confirmed on this part?
Lead spacing, lead diameter, body thickness, operating temperature range, response time, UL or CSA file numbers and the derating curve are not published for the Z number. Verify against the datasheet before use.
Why buy a varistor or two here instead of a strip of a hundred somewhere else?
Because three are on the shelf and you can take the exact count your board needs. One clamp for a repair, a spare beside it, or all three for a small run - you are not buying a minimum lot of a hundred to put one part back across an AC line, and you are not waiting on a reel to be cut. Shipping is $8 flat rate, free once your order passes $28, and orders leave our Idaho warehouse the same or next business day.
Every varistor is a part that spends its whole working life doing nothing, and gets exactly one chance to be spectacular. Wire this one across the line and hope you never find out how good it is.
