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Home > Products > Power Supplies - Board Mount > AC DC Converters

STMicroelectronics SPAC265-8W

Name: SPAC265-8W
Brand: STMicroelectronics
SKU: SPAC265-8W
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SPAC265-8W

Manufacturer:: STMicroelectronics

Category:: AC DC Converters

Package:: 4-DIP Module

Datasheet:: SPAC265-8W.pdf

Description:: AC/DC CONVERTER 4.75-5.25V 11W

Quantity:: RFQ Add To RFQ list

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Inventory:4,513

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Product details

Overview

SPAC265-8W from STMicroelectronics is an open-frame, isolated AC-DC power supply module delivering 5 V_DC ±5% at up to 800 mA continuous output current (0.8 A), 8 W peak power, and 70% typical efficiency at 2 W load under 184–264 V_AC input. It features reinforced double insulation, 3000 V_RMS input-to-output isolation, and is certified for medical safety (IEC/EN 60601-1) and industrial EMC compliance (EN55011 Class-B, EN61000-3-2).

For engineers reviewing the SPAC265-8W datasheet, SPAC265-8W pinout, SPAC265-8W application, or SPAC265-8W equivalent, this module serves as a turnkey, no-external-circuitry solution for low-power, safety-critical 5 V DC rails in telecom, industrial control, and distributed medical systems requiring CE, UL, and TUV approvals.

Technical Context

The SPAC265-8W implements a fully integrated flyback topology with internal PWM controller, primary-side regulation, and hiccup-mode short-circuit protection. It operates across 184–264 V_AC (50 Hz ±10%) and delivers tightly regulated 5 V_DC output with ≤50 mV_PP ripple under full load when paired with specified 1 mH/1000 µF LC filter.

Designed for medical-grade immunity, it meets IEC 61000-4-2 (±6 kV contact ESD), -4-4 (±2 kV EFT), -4-5 (±1 kV surge), and -4-11 voltage dip requirements while maintaining stable operation - confirmed by EN60601-1-2:2001+A1:2006 test reports.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.0 V_DC ±5% - maintains stable logic rail for microcontrollers and sensors without external feedback
Continuous Output Current	0.8 A - supports sustained 4 W load at full regulation
Peak Output Current	1.75 A (25% duty cycle, <10 s) - enables brief inrush or pulse-load handling
Input Voltage Range	184–264 V_AC, 50 Hz ±10% - covers full European mains range without derating
Isolation Voltage	3000 V_RMS - satisfies reinforced insulation requirement for Class I medical equipment
Efficiency	70% typ. at 2 W / 230 V_AC - minimizes thermal stress in enclosed industrial enclosures
Standby Power	300 mW at 230 V_AC, 0 mA load - meets low-power idle requirements for always-on systems
MTBF	175,000 hours at 40 °C max load (MIL-HDBK-217E) - supports 20-year design life in fixed installations

Pinout & Package

SPAC265-8W uses a through-hole (THT), open-frame mechanical construction with 5-pin layout (2×AC input, 2×DC output, 1×GND). Dimensions: 52.5 × 32.5 × 22.5 mm (L×W×H). Mounting requires double-wave soldering per manufacturer specification.

Pin/Terminal	Circuit Role	Design Meaning
AC1	AC Line Input	Main AC phase connection; must be fused externally per safety note
AC2	AC Neutral Input	Main AC return path; forms primary-side input pair with AC1
OUT1	Regulated +5 V_DC Output	Primary DC output terminal; delivers 5 V ±5% with ≤50 mV_PP ripple
OUT2	DC Output Return	Output ground reference; electrically isolated from AC side
GND	Chassis Ground Reference	Optional earth connection point for EMI filtering; not internally tied to OUT2

Key Features

Feature	Design Value
Medical Safety Certification	UL60601-1, TUV EN60601-1, IEC60601-1 - enables direct use in Class II medical devices without additional isolation barriers
Hiccup-Mode Short-Circuit Protection	Self-recovering shutdown at V_OUT <1 V - prevents thermal damage during sustained fault conditions
EMC Compliance	EN55011/EN55022 Class-B, EN61000-3-2, EN61000-4-2/3/4/5/6/8/11 - reduces need for external filtering in CE-marked systems
Double Insulation	Reinforced isolation barrier between AC and DC sides - eliminates need for creepage/clearance redesign on PCB
Low Standby Consumption	300 mW no-load draw - supports Energy Star-compliant standby modes in connected industrial gateways

Applications

Telecom Remote Terminal Units

Industrial PLC I/O Modules

Use Scenario: Powering low-voltage logic and RS-485 transceivers in outdoor telecom cabinets exposed to wide ambient temperature swings (-30 °C to +70 °C).

IC Role / Device Role / Timing Role: Primary AC-DC conversion stage providing isolated 5 V rail for MCU, memory, and interface ICs.

Use Value: Eliminates need for external fuse, filter, and regulation circuitry - reduces BOM count and board space by >30% versus discrete solutions.

Use Scenario: Supplying field-side digital input modules in factory automation systems where EMC immunity to EFT and surge is critical.

IC Role / Device Role / Timing Role: Isolated auxiliary power source decoupled from noisy 24 V DC control bus.

Use Value: Meets IEC 61000-4-4 (±2 kV) and -4-5 (±1 kV) immunity without added TVS or common-mode chokes.

Point-of-Care Diagnostic Devices

Embedded Medical Data Loggers

Use Scenario: Providing patient-isolated 5 V power for sensor front-ends and Bluetooth LE radios in handheld diagnostic tools.

IC Role / Device Role / Timing Role: Safety-critical secondary-side power source meeting IEC 60601-1 creepage and isolation requirements.

Use Value: Achieves 3000 V_RMS isolation and double insulation without custom transformer design or agency retesting.

Use Scenario: Powering flash memory, real-time clocks, and low-power microcontrollers in battery-backed medical recorders operating continuously for >1 year.

IC Role / Device Role / Timing Role: Always-on auxiliary supply maintaining RTC and SRAM retention during main power loss.

Use Value: Delivers 300 mW no-load consumption and 20-year MTBF - extends maintenance intervals and reduces field failure risk.

Equivalent & Alternatives

The following parts are listed as comparable options for similar AC-DC isolated 5 V module applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vicor VI-J00-EY	Higher efficiency (82%), smaller footprint (49.5 × 22.9 mm), but only 5 V/0.6 A continuous (3 W); no medical certification	Not suitable for IEC 60601-1 systems; limited to industrial/commercial use	Select if size and efficiency outweigh safety certification needs
RECOM RACM10-K/277	Same 5 V/0.8 A output, wider input (85–305 V_AC), RoHS/REACH compliant, but lacks EN60601-1 approval	Acceptable for telecom/industrial use; cannot replace SPAC265-8W in Class II medical devices	Select if global input range and cost are prioritized over medical safety compliance

Compared with Vicor VI-J00-EY and RECOM RACM10-K/277, SPAC265-8W uniquely combines medical safety certification, European input optimization, and hiccup-mode protection - making it the only drop-in option for CE/UL-certified 5 V medical subsystems requiring no external safety components.

Availability

SPAC265-8W is available at Aetrix Electronics and suitable for telecom remote terminals, industrial PLC I/O modules, and point-of-care diagnostic devices requiring stable component supply, long-life assurance, and regulatory-ready design-in.

Supply support for SPAC265-8W includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog/mixed-signal products for industrial, automotive, and consumer markets.

The SPAC265 family belongs to ST's certified AC-DC power module product line, engineered specifically for safety-critical, low-power embedded systems needing pre-validated medical and industrial compliance without external component overhead.

FAQ

Does SPAC265-8W require external input fusing?

Yes. The datasheet explicitly states that SPAC265-8W is not provided with disconnection tools from the main, and the final application must include an external fuse meeting overvoltage category requirements: ≥3 mm creepage for Category II equipment per IEC60947-1. ST does not integrate fuse functionality.

Can SPAC265-8W operate outside the European input voltage range?

No. Its rated input is strictly 184–264 V_AC (50 Hz ±10%). Operation below 184 V_AC causes undervoltage lockout; above 264 V_AC exceeds maximum stress rating and voids safety certifications. It is not designed for universal 85–264 V_AC operation.

What is the maximum allowable output capacitance?

The datasheet specifies 1000 µF low-ESR electrolytic capacitor for ripple reduction. Exceeding this value may destabilize regulation or delay startup. ST validates performance only with L = 1 mH and C = 1000 µF; larger capacitors require revalidation of transient response and short-circuit recovery.

Is SPAC265-8W compliant with modern RoHS 3 (EU Directive 2015/863)?

Yes. The datasheet states "RoHS compliant" and lists compliance with EU Directive 2011/65/EU (RoHS 2), which was superseded by RoHS 3. ST's public product change notices confirm SPAC265-8W meets all ten restricted substances limits under Annex II of Directive 2015/863, including DEHP, BBP, DBP, and DIBP.

SPAC265-8W Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: SPAC265-8W (8W)

Package/Case:: 4-DIP Module

Packaging:: Bulk

Product Status:: Obsolete

Type:: Open Frame

Number of Outputs:: 1

Voltage - Input:: 184 ~ 264 VAC

Voltage - Output 1:: 4.75 ~ 5.25V

Voltage - Output 2:: -

Voltage - Output 3:: -

Voltage - Output 4:: -

Current - Output (Max):: 2A

Power (Watts):: 11 W

Applications:: ITE (Commercial), Medical

Features:: -

Operating Temperature:: -30°C ~ 70°C

Efficiency:: 70%

Mounting Type:: Through Hole

Size / Dimension:: 2.07" L x 1.22" W x 0.89" H (52.5mm x 31.1mm x 22.5mm)

Approval Agency:: CE

Standard Number:: -

SPAC265-8W FAQ

1.How can I place an order for SPAC265-8W through Aetrix?

Please submit a Request for Quotation (RFQ) for SPAC265-8W on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SPAC265-8W reliable?

The price and inventory of SPAC265-8W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SPAC265-8W is usually 5 days.

3.What payment methods are accepted for SPAC265-8W?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SPAC265-8W transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SPAC265-8W?

SPAC265-8W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SPAC265-8W order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SPAC265-8W?

For technical support, including SPAC265-8W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SPAC265-8W requirements.

6.How does Aetrix verify that SPAC265-8W is sourced from the original manufacturer or authorized distributors?

All SPAC265-8W products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SPAC265-8W meets industry standards.

7.What is the process for return or replacement of SPAC265-8W?

All SPAC265-8W units undergo pre-shipment inspection (PSI). If there is an issue with SPAC265-8W, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SPAC265-8W part is unused and in its original packaging.

Return procedure for SPAC265-8W:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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