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BK19 Series

Product catalog summary

Overview: The BK19 Series is an ultra-low profile and narrow width hybrid FPC to board connector designed for compact enclosures. It features a 0.3mm pitch, 0.5mm stacking height, and 1.2mm width.

Key Features:

Space-saving Design: The BK19 Series offers a single-row configuration with a 0.3mm pitch, reducing space by 36.8% compared to conventional double-row products.
Robust Design: Fully armored housing prevents damage from mating misalignment.
High Extraction Force: Dimpled contact lock design ensures secure connections.
Superior Mating Performance: Metal guide ribs and a tactile click confirm complete mating.
High Contact Reliability: Two-point contact design for power and signal contacts.
Halogen-Free: Complies with IEC 61249-2-21 standards.

Product Specifications:

Rated Current: Signal Contact: 0.3A, Power Contact: 5A
Rated Voltage: 30V AC/DC
Operating Temperature: -55 to +85°C
Contact Resistance: Signal Contact: 30mΩ Max, Power Contact: 10mΩ Max
Insulation Resistance: 50MΩ Min
Withstanding Voltage: 100V AC for 1 min

Usage Precautions:

Soldering: Peak temperature of 250°C, with specific preheat and reflow conditions.
Manual Soldering: Iron temperature at 340 ± 10°C for up to 3 seconds.
Cleaning: Not recommended due to potential performance impact.
Handling: Ensure proper alignment and support to avoid damage.

Connector Handling Precautions:

Mating: Align connectors correctly using guide ribs and ensure complete mating.
Un-Mating: Remove perpendicularly or diagonally in the pitch direction to avoid stress on contacts.

Additional Considerations: Specifications are subject to change for improvements. For high-reliability applications, contact Hirose for assurance.

Catalog excerpts

Open the catalog to page 1

BK19 Series / 0.3mm Pitch, 0.5mm Stacking Height, 1.2mm Width, Ultra-Low Profile and Narrow Width Hybrid FPC to Board Connector The BK19 Series is engineered for ultra-compact pitch, width, and height, enabling greater design flexibility for compact enclosures. ■ BK19 Series : Single-Row, P=0.3mm, 6pos. Oct.1.2026 Copyright 2026 HIROSE ELECTRIC CO., LTD. All Rights Reserved. ■ Conventional Product : Double-Row, P=0.35mm, 12pos. Fully armored design helps prevent housing damage caused by mating misalignment. < Conventional Designs > No Metal Covering on Housing Housing Partially Covered with Metal...

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BK19 Series / 0.3mm Pitch, 0.5mm Stacking Height, 1.2mm Width, Ultra-Low Profile and Narrow Width Hybrid FPC to Board Connector 4. Superior Mating Performance Oct.1.2026 Copyright 2026 HIROSE ELECTRIC CO., LTD. All Rights Reserved. Wide self-alignment range with metal guide ribs ensures smooth mating (±0.3 mm in pitch direction, ±0.3 mm in width direction). In addition, a clear tactile click from the unique locking contact design confirms complete mating. Metal Guide Ribs Effectively uses dead space to expand self-alignment range when mating 5. High Contact Reliability The two-point contact design...

Open the catalog to page 3

ms BK19 Series / 0.3mm Pitch, 0.5mm Stacking Height, 1.2mm Width, Ultra-Low Profile and Narrow Width Hybrid FPC to Board Connector Oct.1.2026 Copyright 2026 HIROSE ELECTRIC CO., LTD. All Rights Reserved. Note 1 : Includes temperature rise caused by current flow. Note 2 : Range identified without condensation. Note 3 : The term “storage” refers to long-term-storage of unused items before they are mounted on the PCB. Operating temperature / humidity range applies to the product in a temporary storage state such as non-powered after mounting on the PCB during transportation, etc. Materials / Finish...

Open the catalog to page 4

BK19 Series / 0.3 mm Pitch, 0.5 mm Stacking Height, 1.2mm Width, Ultra-Low Profile and Narrow Width Hybrid FPC to Board Connector H15 Oct.1.2026 Copyright 2026 HIROSE ELECTRIC CO., LTD. All Rights Reserved. • Recommended PCB Layout • Recommended Metal Mask Dimensions (Mask Thickness : 0.08mm)

Open the catalog to page 5

Open the catalog to page 6

BK19 Series / 0.3 mm Pitch, 0.5 mm Stacking Height, 1.2mm Width, Ultra-Low Profile and Narrow Width Hybrid FPC to Board Connector H15 Usage Precautions Oct.1.2026 Copyright 2026 HIROSE ELECTRIC CO., LTD. All Rights Reserved. 1. Recommended Solder Temperature Profile 1. Peak Temperature : Maximum of 250°C 2. Heated Section : 220C Min., within 60 seconds 3. Preheated Section : 150 to 180C, 90 to 120 seconds 4. Number of Reflow Cycles : Maximum of 2 cycles Note 1 : The temperature is the surface temperature of the PCB in the vicinity of the connector lead part. Note 2 : When using nitrogen reflow...

Open the catalog to page 7

BK19 Series / 0.3mm Pitch, 0.5mm Stacking Height, 1.2mm Width, Ultra-Low Profile and Narrow Width Hybrid FPC to Board Connector Connector Handling Precautions 【Connector Mating Precautions】 1. Align the connectors to the correct mating position. The connector has guide ribs on the receptacle to ensure proper alignment. Align the plug with the guide ribs before mating. Oct.1.2026 Copyright 2026 HIROSE ELECTRIC CO., LTD. All Rights Reserved. Metal cover guide (Outside) 2. Lower the connector into position. When the connector reaches the correct position, it will naturally drop into place, indicated...

Open the catalog to page 8

BK19 Series / 0.3mm Pitch, 0.5mm Stacking Height, 1.2mm Width, Ultra-Low Profile and Narrow Width Hybrid FPC to Board Connector 【Connector Un- Mating Precautions】 Oct.1.2026 Copyright 2026 HIROSE ELECTRIC CO., LTD. All Rights Reserved. 1. Remove the connector by pulling perpendicular to the mounting surface. This is the recommended unmating method. However, for high-pin-count connectors or very thin FPCs, unmating in this direction may require additional care. 2. If perpendicular removal is difficult, unmate diagonally in the pitch direction. Do not remove the connector in the width direction,...

Open the catalog to page 9

BK19 Series / 0.3mm Pitch, 0.5mm Stacking Height, 1.2mm Width, Ultra-Low Profile and Narrow Width Hybrid FPC to Board Connector While Taking into Consideration Oct.1.2026 Copyright 2026 HIROSE ELECTRIC CO., LTD. All Rights Reserved. Specifications mentioned in this catalog are reference values. When considering to order or use this product, please review the Drawing and Product Specifications sheets. Use an appropriate cable when using the connector in combination with cables. If considering usage of a non- specified cable, please contact your sales representative. If assembly process is done...

Open the catalog to page 10

BK19 Series

BK19 Series

Catalog excerpts

All Hirose Electric Europe B.V. catalogs and technical brochures