China ODM Module Manufacturers Suppliers Factory - Custom Service

Your Professional Module Manufacturer!

For over 20 years, STHL Technology has been a trusted EMS partner, providing custom PCB and PCBA solutions to industries worldwide — including industrial automation, automotive, medical devices, telecommunications, renewable energy, and consumer electronics.

We guide clients through the entire product lifecycle: Component sourcing, PCB design, rapid prototyping, small batch trial runs, seamless scaling to high-volume PCBA production, strict quality control, final assembly, logistics, and after-sales support — delivering reliable electronics manufacturing solutions with proven quality and global reach.

RFM69-ST
The RFM69-ST is a Sub 1GHz RF transceiver module operating on 433, 868, and 915 MHz ISM bands. It supports 2(G)FSK, MSK, and OOK modulation with data rates up to 300 Kbps, combines –120 dBm receiver
RFM69HC-ST
The RFM69HC-ST is a Sub 1GHz RF transceiver module for 315, 433, 868, and 915 MHz ISM bands. It supports 2(G)FSK, MSK, and OOK modulation with data rates up to 300 Kbps. The module combines –120 dBm
HM‑BT4531-ST
The HM BT4531-ST is a Bluetooth 5.3 Low Energy (BLE) module engineered for short range wireless communication with high efficiency, low power consumption, and stable connectivity. Featuring a 32 bit
HM‑BT4502-ST
The HM BT4502-ST is a Bluetooth 5.0 Low Energy pass through module designed for short range wireless communication with stable connectivity, low power consumption, and compact integration. Built on
RFM95C-ST
The RFM95C-ST is a LoRa/FSK transceiver module engineered for Sub 1GHz wireless communication across the 137–1020 MHz band. With –138 dBm sensitivity, 18.3 dBm transmit power, and low power
RFM98P-ST
The RFM98P-ST is a high power LoRa/FSK transceiver module engineered for long range Sub 1GHz communication. Operating across the 137–1020 MHz band, it combines +20 dBm transmit power with –139 dBm
HM‑TRLR‑S-ST
The HM TRLR S-ST is a high performance LoRa transparent transmission module designed for Sub 1GHz wireless communication. Supporting 433 / 470 / 868 / 915 MHz bands, it combines 20 dBm transmit power
RFM6601-ST
The RFM6601-ST is a compact LoRaWAN module built on the ASR6601 SoC, engineered for Sub 1GHz wireless communication across 433.92 / 470 / 868 / 915 MHz bands. It combines 22 dBm transmit power with
HM‑MT7201-ST
The HM MT7201-ST is a compact Matter over Wi Fi communication module designed for 2.4 GHz wireless connectivity. It integrates Wi Fi 802.11 b/g/n and Bluetooth Low Energy (BLE), powered by a 32 bit
HM‑MT2401B-ST
The HM MT2401B-ST is a Matter over Thread wireless communication module designed for 2.4 GHz IoT connectivity. Powered by the EFR32MG24 RF SoC with an embedded ARM Cortex M33 core, it integrates 1536
HM-WF8720-ST
The HM WF8720-ST is a compact Wi Fi and Bluetooth dual protocol module designed for 2.4 GHz wireless communication. Built on the Realtek Ameba Z II platform, it supports 802.11n Wi Fi and Bluetooth
RFM75C‑S3-ST
The RFM75C S3-ST is a 2.4 GHz ISM band transceiver module designed for short range wireless communication in consumer electronics, smart devices, and industrial IoT systems. Supporting air data rates

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Why Choose Us

Advanced Manufacturing Capability

Our facility covers 10,000㎡ and is equipped with 7 high-speed SMT lines and 2 functional testing lines, with a daily capacity of 14 million placements, capable of handling both small batches and large-scale production.

Flexible Production & Quality Control

We offer rapid prototyping, small-batch trial runs, and seamless scaling from samples to mass production. Our full-process quality tracking system (MES + IPQC + QA) ensures precise monitoring at every stage of production.

Rich Industry Experience & Certifications

With over 20 years of experience, we are certified in ISO9001 (quality management), ISO14001 (environmental management), ISO13485 (medical compliance), and IATF16949 (automotive compliance), ensuring compliance with industry standards and high-quality manufacturing.

Global Delivery & Trust

Serving customers in over 60 countries, with long-term partners like Littelfuse, Corsair, and Schneider Electric. We maintain a 98.7% on-time delivery rate, supported by secure inventory and trusted supplier partnerships to meet customer needs efficiently.

Types Of Module

The Module produced by our company mainly include the following types:

RFM75P-ST

The RFM75P-ST is a 2.4 GHz ISM band transceiver module designed for short range wireless communication in consumer electronics, smart devices, and industrial IoT systems. Supporting burst data rates up to 2 Mbps, it combines 28 dBm transmit power with –107 dBm sensitivity, ensuring robust connectivity even in interference prone environments. Its 18 × 33 × 2.2 mm SMT package and SPI interface make it fully compatible with automated EMS/PCBA production lines, enabling efficient high volume manufacturing.

Specification	Value
Frequency Range	2400 – 2483.5 MHz
Operating Voltage	1.9 – 3.6 V
Modulation	(G)FSK
Max Data Rate	2 Mbps (burst mode)
Transmit Current	180 mA
Receive Current	21 mA
Sensitivity	–107 dBm
Transmit Power	28 dBm
Dimensions	18 × 33 × 2.2 mm
Interface	SPI
Compliance	RoHS / REACH certified

PCBA Integration Advantages

SMT Compatibility

Standard 18 × 33 mm package supports automated pick‑and‑place and lead‑free reflow soldering.

Peripheral Integration

SPI interface simplifies PCB layout and firmware development.

RF Layout Optimization

Reserved antenna zones and impedance‑matched traces ensure stable wireless performance.

Power Considerations

Tx current of 180 mA requires careful PCB power design; Rx current of 21 mA supports efficient standby operation.

Mass Production Ready

Fully compatible with SMT/PCBA processes, compliant with RoHS and REACH standards.

Application Fields

Computer peripherals – Wireless keyboards, mice, and accessories.

Wireless game controllers – Stable low‑latency connectivity.

Wireless speakers and audio devices – Short‑range streaming.

Remote controls – Consumer electronics and industrial systems.

Home automation – Smart lighting, switches, and appliances.

Toys and entertainment devices – Interactive wireless play.

The module's high transmit power and strong sensitivity make it suitable for dense RF environments, ensuring reliable communication across diverse applications.

HM-WF8720-ST

The HM WF8720-ST is a compact Wi Fi and Bluetooth dual protocol module designed for 2.4 GHz wireless communication. Built on the Realtek Ameba Z II platform, it supports 802.11n Wi Fi and Bluetooth Low Energy (BLE), enabling seamless connectivity for smart appliances, automation systems, and IoT devices. With 15 dBm transmit power, –74 dBm sensitivity, and 3.3 V operating voltage, the module ensures stable performance and efficient integration. Its 15 × 20.5 mm SMT package and UART interface make it fully compatible with EMS/PCBA mass production lines, supporting scalable, high volume manufacturing.

Specification	Value
Frequency Range	2412 – 2484 MHz (2.4 GHz)
Operating Voltage	3.3 V
Communication Modes	Wi-Fi / BLE
UART Baud Rate	115.2 Kbps
Air Data Rate	Wi-Fi: 65 Mbps / BLE: 1 Mbps
Transmit Current	218 mA
Receive Current	70 mA
Sleep Current	30 µA
Sensitivity	–74 dBm
Transmit Power	15 dBm
Dimensions	15 × 20.5 mm
Interface	UART
Compliance	RoHS / REACH certified

PCBA Integration Advantages

SMT Compatibility

Standard 15 × 20.5 mm package supports automated pick‑and‑place and lead‑free reflow soldering.

Peripheral Integration

UART interface simplifies PCB design and system integration.

RF Layout Optimization

Impedance‑matched antenna traces and reserved RF zones ensure stable wireless performance.

Power Efficiency

Sleep current of 30 µA supports battery‑powered IoT devices.

Mass Production Ready

Fully compatible with SMT/PCBA processes, compliant with RoHS and REACH standards.

Application Fields

Smart appliances – Connected household devices.
Home automation – Lighting, sockets, switches.
Smart plugs and lamps – Remote monitoring and control.
Mesh networking – Multi‑node connectivity.
Industrial wireless control – Automation and monitoring.
Baby monitors & IP cameras – Stable video transmission.
Sensor networks – Environmental and security monitoring.
Wearable electronics – Compact wireless solutions.
Wireless positioning systems – Location sensing and asset tracking.
Security ID tags – Authentication and monitoring.

The module's dual‑protocol capability makes it ideal for IoT deployments requiring Wi‑Fi connectivity with BLE pairing functionality, ensuring interoperability across diverse applications.

Packaging & Shipping

Packing

1. High quality shockproof packaging. Inside: Red or white blister+card board; Outside:carton.

2. Depends on Customer's require, STHL PCBA offfer economical fast forwarder.

Shipping&Payment terms

1. You can choose any express companies you have with your account, or our account, for heavier packages, seaway shipping is also available.

2. Payment terms

By T/T bank ( wire transfer, the most popular way)
By Western Union
By Paypal (especially for samples)
By Cash

Our Certificates

FAQ

Q: Do you support small batch prototyping?

A: Yes. We provide flexible prototyping services for bare PCBs, PCBA, modules, and full box build assemblies, tailored to your project requirements.

Q: What is your minimum order quantity (MOQ)?

A: There is no MOQ. We support one piece prototypes and scale seamlessly to mid and high volume production. Unit cost decreases significantly as order quantities increase.

Q: Can STHL provide one stop EMS solutions?

A: Yes. We deliver end to end EMS services including component sourcing, PCB design, DFM analysis, prototyping, small and large batch PCBA assembly, quality inspection and testing, plus CNC machining, injection molding, and cable assembly for complete box build projects.

Q: What are your lead times for samples and mass production?

A: Standard samples: scheduled within 3 days, delivered in 10–15 days. Mass production: as fast as 15 days. Urgent samples: 72 hour expedited channel (subject to design pre review).

Q: Do you support rush orders?

A: Yes. We reserve 20% production capacity (one SMT line + 50 flexible staff) for expedited orders, handling up to 60,000 additional boards per month.

Q: How do you ensure PCBA quality and reliability?

A: We apply a three tier quality assurance system:
IQC: 100% incoming inspection for ICs, BGAs, and critical components.
In process inspection: SPI, flying probe first article test, AOI, X Ray, ICT, FCT, conformal coating.
Outgoing inspection: OQC plus MES integration, IPQC stations, and QA systems to ensure batch consistency.

Q: Which countries or regions have you served?

A: Our services cover more than 60 countries, with 75% of customers based in Europe and North America. We deliver EMS solutions across industrial automation, automotive electronics, medical devices, communications, renewable energy, wearables, smart home, and UAV industries.

Q: Which component packages and manufacturing capabilities do you support? What is the minimum size?

A: We support mainstream SMT and advanced IC packages with mature miniaturization and high density design capabilities:
Passive components: Down to 01005 (0.4 mm × 0.2 mm), plus 0201, 0402, 0603, etc.
IC packages: QFP, QFN, BGA (pitch down to 0.3 mm), CSP, LGA.
Odd form components: Connectors, shields, sensors, and other non standard parts.
Process capability: Line width/spacing down to 3 mil/3 mil; BGA solder joints inspected by X Ray for voids and reliability.

As one of the leading module manufacturers and suppliers in China, we also support custom service and OEM&ODM service. We warmly welcome you to buy cost-efficient module from our factory. Contact us for more details.