To request connector samples from a Chinese manufacturer for a fast, accurate quote, send a complete requirement pack: part number or controlled drawing, pitch, pin count, mated height, application, annual volume band, target timing window, and test or inspection requirements. Incomplete RFQs force suppliers to assume critical dimensions—and those assumptions are a common source of wrong samples and repeated requotes. Treat the sample request as the first quality gate, not as a casual email for “something similar.”
What To Send In The Sample / Quote Request
Provide the following in one package whenever possible:
PN or drawing — manufacturer PN, competitor PN, or controlled outline/mating/PCB drawings
Pitch — e.g. 0.4 mm or 0.5 mm board-to-board, or LVDS series pitch
Pin count — including ground and any power pins
Mated height — from mechanical stack, not a guess
Application — consumer module, multi-board electronics, display link, modules designed for automotive applications, etc.
Annual volume band — forecast ranges help capacity and packaging advice
Target timing window — sample need-by and expected pilot window (without treating informal day counts as commitments)
Test / inspection requirements — which checks you will run on samples
Catalog orientation helps you fill blanks (per catalog): 0.4 mm BTB themes list mated heights 1.5–4.0 mm, pins 30–70, 0.3 A; 0.5 mm BTB lists heights 3.0–5.0 mm, pins 10–80, 0.5 A. Confirm candidates on product pages such as 0.4 mm pitch board-to-board connectors for consumer electronics, 0.5 mm pitch automotive board-to-board connectors, and floating board-to-board connectors.
Common Omissions That Slow Accurate Quotes
Pitch without height, or height without pin map
Photos without revision-controlled drawings
“Same as previous” without stating plating or packaging codes
Missing application environment (temperature, vibration, serviceability)
No inspection plan—so suppliers cannot ship the right sample class
Volume left blank, then surprise ramp expectations later
Cable/LVDS requests without length, shield, or locking style
Drawing and test-data expectations are detailed in what technical drawings and test data matter most before connector procurement. After samples arrive, use what buyers should check before approving connector samples for inspection items, then how to approve connector samples for mass production for sign-off, first article, pilot, and change control.
WCJM Sample Request Process (General Steps Only)
Typical flow—timing depends on requirement clarity, stock versus custom status, and customer approval loops:
Requirement intake — buyer sends PN/drawing pack and application notes via RFQ.
Technical clarification — engineering confirms pitch, height, pin map, plating, and packaging assumptions; deviations returned in writing.
Sample class confirmation — design-intent versus production-intent samples agreed for the decision you need.
Sample preparation and documentation — parts pulled or built with matching drawings/lot identification.
Shipment and follow-up — packing suited to fine terminals; buyer runs inspection and returns disposition.
Next-gate planning — if samples pass, align first article / pilot expectations before volume discussions.
These are general steps, not calendar promises. Factory process context is on manufacturing quality. For LVDS or cable-heavy requests, also review LVDS connectors and state cable construction up front.
Sample Request Information Checklist
| Information | Buyer action | Risk if missing |
|---|---|---|
| PN / drawing | Attach controlled files | Wrong family shipped |
| Pitch & pins | State explicitly | Density mismatch |
| Mated height | From CAD stack | Mechanical clash |
| Application | Environment + use case | Under-tested sample |
| Volume band | Annual / ramp notes | Packaging/capacity misfit |
| Timing window | Sample and pilot intent | Misaligned expectations |
| Test needs | List inspection/electrical items | Incomplete evidence |
| Packaging prefs | Reel/tray/pick-up cap | SMT handling issues |
How To Write A Clean First RFQ Email
Subject lines that include pitch, height, and pin count get routed faster than “need samples.” In the body, list interface type (BTB rigid, floating, LVDS), attach drawings, and state whether you need matched plug/receptacle pairs. Mention nearby interfaces (for example USB Type-C or Ethernet) only if they affect mechanical keep-outs—link those as separate line items rather than mixing requirements.
If you are still choosing between 0.4 mm and 0.5 mm, say so and share constraints; the comparison framework in 0.4 mm vs 0.5 mm pitch board-to-board connectors can guide internal alignment before the RFQ.
Separate Quote Accuracy From Sample Speed Narratives
Buyers often optimize for the fastest sample promise. Accurate quotes come from complete inputs; incomplete packs create fast but wrong samples that burn more calendar time overall. Prefer a supplier who returns written clarifications over one who ships a look-alike without confirming height or plating.
After the first sample disposition, update the RFQ pack with approved revision and inspection results so follow-on quotes and first articles stay aligned. Keep USB or Ethernet interfaces on separate lines if they share the board—see product pages only when those parts are actually in scope, such as USB Type-C connectors for keep-out reviews.
Document who inside your company can change pitch, height, or pin count after samples are requested. Uncontrolled mid-stream changes reset supplier work and undermine the “fast, accurate” goal.
FAQ
What is the single most important attachment?
A revision-controlled drawing (outline, mating, PCB footprint) or an exact PN. Photos alone are not enough for accurate samples.
Should I request samples before sharing volume?
Share at least a volume band. Capacity and packaging advice improve when suppliers understand whether the request is evaluation-only or pre-production.
Design sample or production-intent sample—which should I ask for?
Ask for the class that matches your decision. Fit checks can use design-intent parts; plating and coplanarity decisions usually need production-intent lots.
What if I only know a competitor PN?
Send it with your stack height and process notes. Suppliers can propose alternatives, but you must still approve drawings before freezing copper.
How do sample inspection and mass-production approval connect?
Inspect samples first (dimensions, mating, soldering, electrical), then run process gates (sign-off, first article, pilot, change control) using the two linked articles above.
Request A Quote
Prepare your PN or drawing pack, pitch/height/pin count, application, volume band, timing window, and test requirements, then submit through https://www.wcjmconnect.com/contact. Weicheng will clarify technical assumptions and arrange appropriate samples for engineering review.