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Questions tagged [clearance]

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Clearance denotes the shortest distance between two conductive parts as measured through the air.

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I was tasked to do a preliminary study, to check if we can add relays for a 320Vdc distribution board (inside a subsea robot). Space is quite limited, and therefore feasibility will (partly) depend on ...
Sandro's user avatar
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I'm defining a clearance rule in Altium PCB. The desired result is to have a 0.1 mm clearance between GND polygon GND_L and Keep-Out layer element created by "Create Primitives From Board Shape.&...
AKTanara's user avatar
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I'm designing a circuit which has to meet the standard IEC 61010-1. It has a transient voltage limitation at the input, so I can calculate my clearances according to section K.3.2. The surge ...
c-a's user avatar
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I'm trying to figure out where to find standards regarding the minimum distance between conductors on a PCB that will be hi-potted. The hi-pot test gradually increases over 10 seconds up to 4.7k VDC ...
Devon Crites's user avatar
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This table shows PCB clearance requirements, and I'm wondering if for B1, we can use these standards as long as the traces are covered with coating on the PCB? For top and bottom layers that are close ...
이성규's user avatar
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I am currently designing a PCB for a 60W converter and facing challenges in setting appropriate trace clearances. To maximize power density, I need to minimize clearance distances as much as possible, ...
이성규's user avatar
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I need to purchase the relevant standard, but don't want to spend money purchasing the wrong standard. Can PCB creepage and clearance guidance for 1.5kVDC be found using IPC-2221C? Is that the ...
rsw015's user avatar
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I'm trying to make Altium ignore the silk screen when it checks the component boundaries. I would like to use the 'Component pushing'->'Avoid' but it doesn't let me place components close enough if ...
Arni's user avatar
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For the design of a buck converter which is the minimum clearance I have to comply for the switching node? Do I need to look at the maximum voltage of the switching node and from there use IPC 222-1?
Mirko Maffioletti's user avatar
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I am currently designing a device which is intended to communicate with different devices over RS232. The communication targets are mainly network switches from different manufacturers. The distance ...
Viermusketiere's user avatar
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In an Altium pcb I need to implement this clearance scheme: default clearance: 0.15mm Nets belonging to "HV" class, on internal layers: 0.2mm Nets belonging to "HV" class, on ...
Isacco's user avatar
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The need for this rule is to have a proper clearance for a selective solder nozzle. When a selective solder machine puts solder on a TH pin, the nozzle is at the center of the pad. I need to make sure ...
Experiment-626's user avatar
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I'm designing a flyback power supply for medium LED (10 W) which powered from mains voltage (90-240 Vac). I followed the rules regarding clearance and creepage DIN EN 60664-1 (VDE 0110-1) for my ...
FrancisS's user avatar
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I am designing a PCB for a three-phase system and considering using the Xinya XY2500 4-pin pluggable terminal connector (pitch 5.08 mm, rated 15A @ 300V) to connect R (Phase 1), Y (Phase 2), B (Phase ...
Shubham's user avatar
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I'm designing a DC low voltage system ( 1000VDC) with immersion cooling. I have been referring to EN 60664-1 to size clearance and creepage distance, but this standard is ok for air only. Is there any ...
PatAll's user avatar
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I need to set the DRC rules for a BGA component. That's because JLCPCB have unique capabilities for BGA packages. In this case I need to have a unique clearance for my BGA component. I want to have ...
euraad's user avatar
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I have almost finished my first 4-layer PCB design using Signal(Top)-Ground-Power-Signal(Bottom) stack-up and have some questions before sending it to production. Due to the very tight space on the ...
Semih's user avatar
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How does one decide if a particular isolation is required to meet creepage/clearance? Do all insulators have to conform to the creepage/clearance requirement? In my design, I have a receiver circuit ...
Cyclone1's user avatar
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I have settled on this component for our spin dials: https://www.digikey.com/en/products/detail/cts-electrocomponents/292V1X24A/12091626 Problem is, in fusion pcb my pads nearly touch, while the holes ...
Wes Ellgass's user avatar
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I'm designing a PCB in Altium Designer. I've defined Clearance Rules for certain nets. When I run the DRC (Design Rule Check) I get errors that the Clearance between the Keepout and the Pad doesn't ...
codeofandrin's user avatar
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Say you need to comply with a creepage distance but you can't do it under a specific pollution degree. I had 2 scenarios where I had mixed pollution degrees: The creepage distance is almost enough ...
HatimB's user avatar
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Are there any standard component clearance guidelines/rules/best practices (for SMD parts)? Or does one have to talk to the EMS every time for all the components' clearance? For example how close can ...
mr dude's user avatar
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I am looking to have a PCB produced for a personal project of mine. I have to use very thin traces and tight clearances to escape pads on a BGA chip on my board. I was looking at the capabilities of ...
elialm's user avatar
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My issue: Because of wave and selective soldering techniques, I need an 8mm clearance for an SMD pad to a TH pad that is on the opposite side of a placed TH part. Here is the scenario to better ...
Experiment-626's user avatar
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In my project, I have several rules set for creepage. I get 12 violations on this rule, but always between the polygon and a pad or via. This is strange because the polygon is drawn by Altium ...
hgerrebrands's user avatar
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The spec for the HCPL3700M (AC voltage detection IC) lists an "External Clearance" of ≥7.4mm. Is this saying that no component or exposed trace should be within 7.4mm on any side of the chip?...
user272901's user avatar
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I am getting a clearance error on the Sullins connector PPTC191LFBN-RC. I got the EDA models from Octopart. On including this model in my design I am getting a solder pad clearance error on both the ...
Soham Chakraborty's user avatar
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I tried to solve these errors using blind and buried vias, but the errors persist. I want when I repour the poly, it creates a clearance between the vias and poly. Or another solutions for the error. ...
Vladimir Villamizar's user avatar
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6 votes
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I'd like to keep the option between components with slightly different footprints. In this particular case it's tactile switches with either 6.5mm or 8mm distance between legs. It looks ok to me but I'...
sui's user avatar
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I have a polygon reaching to the outside of the board. There I want to place mousebites for the panel, but when they are placed, there is a clearance generated around the holes that I don't want: ...
Kreatronik's user avatar
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1 answer
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This is a 1kV SMPS design and it is considered a PRIMARY CIRCUIT by UL because it connects directly to 120V AC MAINS. It does not expose its 1kV output directly to the user, but uses the voltage ...
Derek Tables's user avatar
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7 votes
3 answers
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I am working on a project for LED control with MCU and LED drivers. I have an input voltage of 24 V and a DCDC converter to 3.3 V for the MCU. Each LED controller will have an output current of 1 A. I ...
Urban's user avatar
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What are typical clearance settings for a filled zone (GND) on a PCB with 3.3V and 12V voltages? Is 0.25mm enough?
TWT's user avatar
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I have a small (24 x 15 mm) PCB for a custom connector. It is intended for low voltage (< 48 VDC) applications, but I am interested in measuring it in order to provide customers a reasonable ...
JYelton's user avatar
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I'm currently designing a power supply with high isolation between primary and secondary sides and have to comply to standard distances on clearance and creepage. My question is regarding creepage, I ...
anzorein's user avatar
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3 votes
4 answers
2k views

I'm new to Altium and want to measure distance between two pads' solder-mask clearance using Reports-->Measure. I tried activating solder-mask layer only and then tried to measure like regular ...
Ashutosh Jha's user avatar
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1 answer
2k views

I am a student and I want to design a PCB. I am using Altium Designer 22. I selected 0.5 mm for the clearance constraint rule, but I got an error. If I select 0.3 mm I still get the same error. How ...
Aiakon's user avatar
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1 answer
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My PCB has to meet EN 61010 safety standard and i had a question regarding creepage and clearance values. Has anyone got any experience applying this standard and when the creepage and clearance ...
Noj911's user avatar
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1 answer
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In my project I need to control 2 relays from ESP-12E, I have isolated AC & DC side in my PCB design by 4mm PCB Material : FR4, with general Silkscreen coating (green polymer coated) According to ...
saurabh kandalkar's user avatar
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2 answers
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I have PCB design where there are two pads the may be shorted (manually in assembly) or left as is, depending on the product model. The through hole circular pad is actually for a terminal block. I ...
Shadow's user avatar
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3 votes
1 answer
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Our PCB manufacturer specifies that there should be a minimum clearance between holes of 0.5mm when nets are different. I am getting a lot of errors when I have thermal pads with embedded vias closer ...
TripleAntigen's user avatar
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1 answer
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Below are two pictures. The first picture is from IPC-2221. I made the second picture. Which categories do the L1, L2, L3 and L4 clearances in the second picture belong to in the first picture at 310 ...
johny adv's user avatar
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2 votes
1 answer
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How many mm should the clearance be between the A and B pads in the picture below? And clearance between C pad and D pad? And clearance between E pad and F track? And clearance between F track and G ...
johny adv's user avatar
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1 answer
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I am designing a PCB to switch high voltage (440VAC) from a microcontroller. In this project, the 440VAC voltage is galvanically isolated from the microcontroller circuit. I am using an opto-coupler ...
SKGadi's user avatar
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I am having some difficulty regarding the interpretation of 61010-1:2010 with regards to spacings. I think this is more of high level question/s at this point. Summary of Problem Scenario I am placing ...
Steevo's user avatar
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1 vote
1 answer
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I’m looking to mount SMT pogo pins on a PCB. The connectors will see a maximum working voltage of 120VDC between any two pins, but only when connected to their corresponding female header. If the ...
cdubs's user avatar
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179 views

With IEC 60664-1 you require clearance between phase and earth. But if you have a resistor voltage divider between phase and earth do you need the same clearance between the pads of the resistors? Or ...
MMmmm's user avatar
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1 vote
2 answers
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I was wondering about digital isolators. I have some temperature sensors installed inside the windings of a 6.6kV motor. I would like for my system to not be completely destroyed in case of a short. ...
N. Berg's user avatar
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I'm royally confused! I have Altium 20.x.x on one PC. I do a PCB design on this PC and I have no issues. I port that same project to Altium 21.1.1 and suddenly I have major clearance issues when I go ...
BBridges's user avatar
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I am laying out a 2-layer PCB that has only through hole components, and I need it to be as small as possible. I was wondering how small I can set the clearance rule between the components? When I ...
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