A REVIEW, NOT AN AUTOMATIC EQUIVALENCE CLAIM
Match the interface, not just the appearance.
The same nominal pitch or a successful mechanical fit does not prove compatibility. The complete current path, insulation system, footprint, mating interface and ordered configuration still need confirmation.
Candidate for direct fit
Key mechanical, mating and electrical requirements appear aligned, subject to drawing and sample approval.
Functional alternative
The connection function may be suitable, but one or more interfaces or specifications differ and need review.
Redesign required
PCB footprint, mating part, housing or installation details prevent a drop-in substitution.
Not enough evidence
Missing drawings, ratings or interface dimensions stay unresolved instead of being guessed from appearance.
HOW TO IDENTIFY A PCB TERMINAL BLOCK
Seven steps from an unknown part to a checkable replacement request.
Complete the steps in order when the model is unreadable. If an exact part number is available, use the same sequence to verify that its current drawing and ordered configuration match the installed interface.
- 01
Record every marking before cleaning or removal
Photograph the complete housing, logo, printed series, suffix, position marking and any board or equipment label. Keep an uncertain character visible instead of silently correcting it.
OUTPUT: Candidate manufacturer, series and full-code evidenceSearch the current model directory → - 02
Identify the part’s function in the assembly
Separate a removable plug from its PCB header, a direct PCB screw or spring block, and a barrier-style equipment terminal. Photograph both halves when the part mates.
OUTPUT: Connection family and counterpart roleCompare connection families → - 03
Count positions, rows and contact intervals
Record the complete position count, row count and any skipped or keyed position. A five-position row contains four center-to-center intervals for pitch calculation.
OUTPUT: Position, row and interval countReview the 5.0 vs 5.08 mm example → - 04
Measure pitch across several contacts
Measure from the center of the first contact to the center of the last, then divide by positions minus one. Do not measure the outside housing width as pitch.
OUTPUT: Nominal pitch candidates and measured center spanCalculate the measured pitch → - 05
Document the PCB and mating interface
Capture pin rows, pin size, hole pattern, solder orientation, housing envelope, wire entry, flange, latch, keying and polarization. Include the installed enclosure and tool-access limits.
OUTPUT: Footprint, envelope and mating evidenceCompare current technical drawings → - 06
Record the production conductor and application
Name solid, stranded or ferruled wire, conductor range, strip or torque process, required current and voltage, target market and operating conditions from controlled requirements.
OUTPUT: Wiring, electrical and document requirementsPrepare the complete RFQ checklist → - 07
Compare the exact drawing and approve a sample
Classify the result as a direct-fit candidate, functional alternative, redesign or insufficient evidence. Keep every difference open until the drawing, mating pair and production-intent sample are reviewed.
OUTPUT: Candidate, differences and next sample actionUse the sample approval checklist →
STRUCTURED MATCHING REQUEST
Turn the existing part into a checkable RFQ.
Fill in what you know. Unknown fields stay explicit, so a candidate is not mistaken for a confirmed replacement.
MATCHING MATRIX
Six checks before a candidate becomes a sample.
Send evidence for each row. If a value is unknown, label it unknown instead of filling it from a visually similar product.
Exact model, manufacturer, suffix and revision
Housing marking, BOM or original drawing
Plug, header, PCB block, barrier or spring connection
Full assembly and application photos
Pitch, positions, pin layout, housing, latch and flange
Caliper measurements and PCB footprint
Conductor type, wire range, strip length and entry direction
Wire specification and installation view
Required current, voltage and applicable operating conditions
Equipment specification and exact product data
Target market, requested documents and final ordered configuration
Current certificates or document requirements
PHOTO & DRAWING CHECKLIST
Show the interfaces that a product photo can hide.
- 01
Front view with the complete position count and any printed markings.
- 02
Side view showing wire-entry, screw or spring mechanism and housing profile.
- 03
Pin or PCB view showing pitch, row layout, flange and orientation.
- 04
For pluggable parts, both mating halves, keying, latch and polarization details.
- 05
Original drawing, PCB footprint, BOM line or equipment specification if available.
WHY IDENTIFICATION USES ATTRIBUTES, DRAWINGS AND COUNTERPARTS
Official product systems keep each layer of evidence separate.
These manufacturer examples support the identification sequence. Their product values are not copied to a YIHENTRA model or treated as proof of interchangeability.
CURRENT PRODUCT REFERENCES
Search 53 listed models before opening a custom review.
Search the current catalog by printed model or pitch. If there is no exact result, return here with the closest reference and unresolved differences.
BUYER FAQ
Terminal block replacement questions.
Can a terminal block be cross-referenced from a photo alone?
A photo can narrow the family, but it does not prove pitch, PCB footprint, mating geometry, conductor acceptance, ratings or approvals. Measurements, drawings and a sample are normally needed before substitution approval.
Is the same pitch enough for a direct replacement?
No. Position count, total span, pin layout, housing, wire entry, plug/header interface, latch, flange and electrical requirements must also be checked.
What if the original model number is unreadable?
Enter unknown and send clear front, side, pin or PCB, wire-entry and marking photos. Measure the contact-center span across several positions and include the PCB footprint when possible.
Does YIHENTRA guarantee that a suggested model is interchangeable?
No automatic interchangeability is claimed. A candidate remains subject to exact specification review, drawing comparison, mating-pair confirmation and physical sample approval.
Can I attach a drawing or photos through this form?
The builder opens a prepared email or WhatsApp message. Attach the files in your email or WhatsApp application before sending; the website itself does not upload or store them.