Who This Checklist Is For

I'm writing this for the person who actually places the order for Harting Han E connectors. Not the engineer who specified them. Not the plant manager who said "get the usual." You're the one comparing quotes, chasing lead times, and reconciling invoices at the end of the quarter.

This checklist covers the five steps I run through before I sign off on any Han E order. It doesn't cover electrical specs — that's for your engineers. It doesn't cover installation — that's on the floor. What it does cover is where the money actually goes.

Total time to run through this: about 45 minutes if you've done it before. A couple of hours if it's your first time and you're starting from a blank spreadsheet.

Step 1: Pin Down the Application Before You Look at a Single Part Number

This sounds obvious. It isn't.

I've lost count of the times a requisition arrived with a part number and nothing else. "We need 200 units of [X]." Okay — but what's it going into? A standard industrial cabinet? An outdoor enclosure? A mobile equipment application? A G310 5G infrastructure build? Each one changes the spec.

And before we go further: if you're asking "what is Han E?" — it's Harting's standard rectangular connector series for industrial environments. It's not their harsh-environment line (that's HPR). It's not their modular line. It's the workhorse series you'll find in most factory automation setups. Knowing which series you actually need is the first cost decision.

Before you do anything else, get answers to these:

  • Environmental rating. IP65 is the baseline. IP67 adds cost. IP69K adds a lot more. IP ratings are defined by IEC 60529 — IP65 means dust-tight and protected against water jets, IP67 means temporary immersion, IP69K means high-pressure high-temperature washdown. Don't pay for IP69K if your connectors live in a dry cabinet.
  • Mating cycles. A fixed installation might see 50 cycles over its life. A test bench might see 50 a week. The contact plating and housing material differ.
  • Cable diameter range. Han E hoods and housings come in specific size ranges. Get this wrong and nothing fits — no matter how good the price was.
  • New build or replacement? Replacements are easier, but only if the original part number was actually correct. I've seen three generations of "the same part" turn out to be three different specs.

Here's the thing: if you don't nail this down now, you'll do it later. The only difference is whether it happens before the purchase order or after the return freight.

Step 2: Break Down the Real Cost Per Connector

The unit price on the quote is fiction until you've seen every line item.

I've tracked connector orders in the same spreadsheet structure for seven years. The pattern never changes: the sticker price is 60-75% of what you actually pay.

Here's what sits on top of the unit price:

  • Crimp tooling. If you're using non-Harting crimp tools, your scrap rate climbs. I've measured it. On a 500-unit run, a $300 investment in the correct tool saved us $1,400 in rework. Not a guess — that's from our Q1 2024 numbers.
  • Setup or minimum order charges. Some distributors waive these. Some bury them. Ask before you assume.
  • Freight. Connectors aren't heavy, but they're bulky. LTL freight for a pallet of Han E housings adds up fast — especially if you're ordering from a distributor that ships from a single warehouse.
  • Inspection labor. If you're not inspecting incoming connectors, you're gambling. A basic sample inspection adds a few labor hours per shipment.
  • Inventory carrying cost. That 5% discount for ordering 1,000 units instead of 200? It's not a discount if half of them sit on a shelf for 18 months. Warehouse space isn't free.

So the actual cost per installed connector is: quote price + tooling + freight + inspection + storage.

I built a simple TCO calculator after getting burned on a "discounted" bulk order in Q3 2023. The bulk discount saved $2,800 on the invoice. We paid $340/month for 14 months in warehouse space to store the surplus. That's $4,760 in storage. The discount was a net loss of $1,960. My CFO noticed. I noticed the CFO noticing.

Step 3: Verify Lead Times From the Source, Not the Reseller

Distributor lead times are estimates. Harting's own lead times are commitments.

I'm not saying you should always buy direct — sometimes the distributor channel is faster or the pricing is better. But when you're planning a production run, you need to know the difference between "12 weeks, probably" and "12 weeks, confirmed."

Harting's Elgin facility handles a significant share of North American orders. Lead times from Elgin depend on whether you're ordering standard catalog items or non-standard configurations. Standard Han E components ship faster. Custom hoods and non-standard cable entries add weeks.

Ask your distributor directly: "Is this item in stock at Harting, or is it being built?" If they don't know, that's your answer.

Our procurement policy now requires written lead time confirmation — not an estimate — before we sign off on anything with a production deadline attached. This came after a Q2 2024 incident where "available in 4 weeks" turned into 11 weeks with no notice. The numbers said go with the distributor offering 12% lower per-unit pricing. My gut said the 6-week lead time was a problem. I went with my gut and paid 8% more per unit through the direct channel. Turns out the cheaper distributor's lead time was based on a container shipment that hadn't cleared customs. The direct channel delivered in 5 weeks. The "cheaper" option would have been 4 weeks late.

Step 4: Cross-Check Part Numbers — Especially the Ones You Didn't Order

Here's a mistake I made twice before I learned: trusting the part number on the requisition.

Someone asks for "2780." Maybe it's a crimp tool. Maybe it's a connector. Maybe it's a cable assembly. The number alone doesn't tell you enough.

You need to verify three things:

  • Is this the current version? Harting has updated catalog numbers over the years. A number that worked in 2019 might be superseded now.
  • Does the description match the application spec from Step 1? A part number that's correct for a static installation might be wrong for a vibration-heavy environment. The number doesn't tell you that — the datasheet does.
  • Is it genuine Harting or a "compatible" alternative? The quote should say. If it doesn't, ask. "Compatible" is not a spec. It's a gamble.

This isn't paranoia. It's math. A wrong part number costs you the part price plus return freight plus the delay. I've seen a single digit error add two weeks to a project timeline. Not ideal. Expensive, actually.

The most frustrating part of connector sourcing: the same issues recurring despite clear specifications. You'd think a written part number would eliminate ambiguity. It doesn't. I've seen the same "out of stock" message show up three quarters in a row for the same item — and every time, the distributor's system said it was available.

Step 5: Run the TCO Numbers Before You Commit

Here's the formula I use:

(Unit price × quantity) + tooling + freight + inspection labor + storage cost − scrap recovery = real cost

Then divide by the number of units you'll actually install in the next 12 months.

That last part is key. If you're buying 500 connectors but you'll only install 300 this year, you're not comparing unit prices — you're comparing unit prices plus the cost of carrying inventory.

Run this before you approve any purchase order over $2,000. It takes 10 minutes. It's saved me from at least a dozen bad decisions — and at least twice, it confirmed that the higher unit price was actually the better deal.

Two Mistakes Most Buyers Make

They trust the quote. Quotes have expiration dates. Quotes have assumptions ("does not include customs clearance"). Quotes have fine print. Read all of it before you sign. I'm not a legal expert, so I won't pretend to interpret contract language — but I can tell you that the phrase "estimated shipping" has cost me more money than any other three words in procurement.

They skip the sample stage. Before a bulk order, buy two or three units and inspect them yourself. Check the housing fit. Check the contact alignment. Check the cable entry clearance. It's a small cost that catches big problems. We added this to our procurement policy in 2023. It has caught two bad batches since then.

Look, I'm not an electrical engineer. I can't speak to signal integrity or contact resistance specs — that's outside my lane. What I can tell you, from a procurement perspective, is that the cost difference between "the cheapest option" and "the right option" usually shows up six months later in a budget line item labeled "rework." That's not a line item I like explaining to my CFO.

So before you sign off on the next Han E order, run the five steps above. The checklist isn't perfect — nothing in procurement is. But it's better than trusting the quote. And cheaper than trusting your gut alone.

For telecom planning, the article should be read with protocol context in mind: 3GPP TS 38.xxx for radio behavior, IEEE 802.3bt for high-power PoE, ITU-T G.652.D for optical fiber assumptions, insertion loss in dB for link budget, and PIM in dBc for passive RF quality.