Regulatory Compliance Guide

UL 969 & CSA C22.2 Label Standards Explained

The definitive engineering reference for Underwriters Laboratories (UL 969) Marking & Labeling Systems. Understand PGJI2 vs PGDQ2 category codes, testing parameters, and certified Brady material combinations under UL Files MH17154 and MH64936.

UL 969 Marking and Labeling Systems Certified Rating Plate on Circuit Board

Figure 1: UL 969 recognized permanent rating plate label with UL Mark and 2D barcode after environmental chamber weathering and wave solder reflow.Permanent Polyester B-423 / B-483A

1. What is the UL 969 Standard?

UL 969 (standard for Marking and Labeling Systems) governs the durability, legibility, and permanence of labels used for critical safety warnings, serial plates, electrical ratings, and hazard notices on manufactured equipment. In Canada, the equivalent testing standard is CSA C22.2 No. 0.15.

Unlike standard consumer stickers, a UL 969 certified label is evaluated as a complete system comprising:

1. Substrate / Surface

Stainless steel, aluminum, powder-coated steel, ABS, polypropylene

2. Face Stock & Adhesive

Specific Brady B-number (e.g. B-423, B-483A, B-427)

3. Thermal Ribbon

Specific tested ribbon (e.g. Series R6000HF, R4300)

Critical Engineering Rule: UL recognition is void if an unapproved ribbon is substituted. To maintain UL compliance on your product, you must print the recognized Brady B-number with its corresponding tested ribbon series.

2. UL 969 CCN Category Codes (PGJI2 vs PGDQ2)

UL classifies marking materials under distinct Category Control Numbers (CCNs):

PGJI2 / PGJI8 — Printing Materials (Blank Thermal Labels)Component Recognition

Covers blank label stock intended for secondary thermal transfer printing by the end user or OEM. Brady materials listed under File MH17154 and MH64936 are recognized under PGJI2.

PGDQ2 / PGDQ8 — Marking and Labeling Systems (Finished Labels)Pre-Printed Labels

Covers completely finished, pre-printed labels manufactured by an authorized printing facility and shipped ready to apply.

3. Top UL 969 Recognized Brady Materials Matrix

Material	UL File #	CSA File #	Recognized Ribbon	UL Temp Range	Approved Test Surfaces
B-423 Permanent Gloss White Polyester	MH17154	File 041833	R6000HF, R4400	-40°C to 120°C	Stainless steel, smooth aluminum, ABS, acrylic
B-483A Ultra-Aggressive High-Tack Polyester	MH17154	File 041833	R6000HF, R4900	-40°C to 120°C	Powder-coated steel, textured polycarbonates, polypropylene (LSE)
B-427 Self-Laminating Vinyl Wire Wraps	MH64936	Accepted	R4300	-40°C to 70°C	PVC wire jackets, XLPE, Teflon, cross-linked cabling
B-499A Conformable Nylon Cloth	MH17154	Accepted	R4300, R4900	-40°C to 90°C	Curved wires, terminal blocks, rough cast metal
B-593 Raised Panel Legend Plates	MH17154	Accepted	R6000HF	-20°C to 100°C	Painted electrical enclosures, switchboard doors
B-652 High-Temp Polyimide (300°C)	MH17154	Accepted	R6000HF	-40°C to 300°C	FR-4 circuit boards, ceramic modules, solder wave
B-428 Metallized Silver Polyester	MH17154	File 041833	R4300, R6000HF	-40°C to 120°C	Cast aluminum, stamped steel, machine tool housings