My Inquiry
My Account
STMicroelectronics SPDC400FC12M0.35
- Part No.:
- SPDC400FC12M0.35
- Manufacturer:
- STMicroelectronics
- Category:
- DC DC Converters
- Package:
- Module
- Datasheet:
-
SPDC400FC12M0.35.pdf
- Description:
- DC DC CONVERTER -12V
- Quantity:
- Payment:
- Shipping:
Inventory:3,776
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SPDC400FC12M0.35 from STMicroelectronics is an open-frame, non-isolated DC-DC step-down power module delivering -12 V at 0.35 A (4.0 W) from a wide 100–370 VDC input. It features hiccup-mode short-circuit protection, 80% typical efficiency at full load, no heatsink requirement, and RoHS-compliant construction. It serves as an auxiliary power supply in industrial control panels requiring compact, self-contained negative rail generation.
For engineers reviewing the SPDC400FC12M0.35 datasheet, SPDC400FC12M0.35 pinout, SPDC400FC12M0.35 application, or SPDC400FC12M0.35 equivalent, key selection criteria include its -12 V fixed output polarity, comb-style through-hole termination, open-frame thermal design, hiccup-mode fault response, and compatibility with rectified universal AC inputs.
Technical Context
This module implements a fixed-frequency, current-mode flyback-derived topology optimized for high-input-voltage auxiliary conversion. It integrates switching MOSFET, controller, and transformer into a single encapsulated open-frame assembly with no external components required for regulation or protection.
Input voltage range (100–370 VDC) targets applications using bridge-rectified AC mains; output is fixed at -12 V with ±5% tolerance and 5% peak-to-peak ripple. Thermal design relies on natural convection-no heatsink needed-and supports operation from -10 °C to +85 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 100–370 VDC: Accepts rectified universal AC (85–264 VAC) without pre-regulation |
| Output Voltage | -12 V ±5%: Fixed negative rail suitable for op-amp biasing or gate drive referencing |
| Max Output Current | 0.35 A: Sustains 4.0 W continuous output under natural convection cooling |
| Efficiency | 80% typ. at full load: Minimizes power loss and board-level heat dissipation |
| Short-Circuit Response | Hiccup mode: Cycles on/off during fault to limit average power and enable self-recovery |
| Operating Temp | -10 to +85 °C: Validated for industrial enclosure environments without forced airflow |
| Standby Power | 0.3 W at 320 VDC/0 mA: Reduces energy waste in always-on auxiliary systems |
Pinout & Package
SPDC400FC12M0.35 uses an open-frame mechanical design with comb-style through-hole terminals. Dimensions: 32.5 mm × 22.5 mm × 11.5 mm (L × W × H). Weight: 9 g typical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | L1 | Positive DC input terminal - connects to high-side of rectified input |
| 3 | N1 | Negative DC input terminal - electrically tied to RTN on PCB; forms return path |
| 4 | Polarization Key | Mechanical alignment feature preventing incorrect insertion during assembly |
| 5 & 6 | Connected Internally | Internally joined pair - used as redundant input return or thermal relief pad |
| 10 | RTN | Output voltage return - common reference for -12 V output and input N1 |
| 12 | -12 V | Negative output terminal - delivers regulated -12 V to load |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Full regulation, filtering, and protection integrated - eliminates BOM count and layout risk |
| Open-frame thermal architecture | Relies on PCB copper and ambient convection - avoids heatsink cost, weight, and mounting complexity |
| Non-latching hiccup protection | Auto-restarts after fault clearance - maintains system uptime without manual reset |
| Comb-style through-hole termination | Provides robust mechanical retention and high-current capability for automated assembly |
| RoHS-compliant construction | Meets EU Directive 2011/65/EU - supports global manufacturing and environmental compliance |
Applications
| Industrial PLC I/O Modules | Appliance Control Boards |
|---|---|
Use Scenario: Providing isolated auxiliary bias for analog input conditioning circuits in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Delivers stable -12 V rail to op-amps and ADC reference buffers, enabling bipolar signal acquisition. Use Value: Eliminates need for discrete transformer-based supplies, reducing footprint by >40% and simplifying CE-compliant EMI filtering. | Use Scenario: Powering microcontroller peripherals and display backlight drivers in smart refrigerator main control boards. IC Role / Device Role / Timing Role: Supplies clean negative voltage for LCD contrast control and sensor interface ICs requiring dual-rail operation. Use Value: Enables direct use of rectified AC bus without additional DC-DC stages - cuts BoM cost by $0.85/unit at volume. |
| Telecom Line Card Supervision | Building Automation Sensors |
Use Scenario: Generating auxiliary bias for voltage supervisors and watchdog timers on carrier-grade line cards operating from -48 V DC plant power. IC Role / Device Role / Timing Role: Converts -48 V input to -12 V for precision voltage monitoring ICs with tight threshold tolerances. Use Value: Maintains ±5% output accuracy across -40 °C to +70 °C - ensures reliable brown-out detection over full temperature range. | Use Scenario: Powering RS-485 transceivers and environmental sensors in battery-backed HVAC zone controllers. IC Role / Device Role / Timing Role: Provides low-noise -12 V for differential bus drivers requiring symmetric supply rails. Use Value: Achieves <5% ripple without external LC filter - reduces component count and improves long-term reliability in dusty environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar non-isolated negative-output DC-DC module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vicor VI-BR12 | Isolated, 12 VIN-to--12 VOUT, 0.33 A, requires external input filter | Requires isolation barrier and safety certification; suited for medical/safety-critical systems | Select when galvanic isolation or UL/IEC 60950-1 compliance is mandatory |
| RECOM RxxP2xx | Isolated, -12 VOUT, 0.33 A, 2:1 input range (4.5–9 VDC), not compatible with high-VIN | Designed for low-voltage battery or PoE inputs - cannot replace SPDC400FC12M0.35 in AC-mains-derived designs | Select only for low-input-voltage embedded systems where isolation is required |
Compared with Vicor VI-BR12 and RECOM RxxP2xx, SPDC400FC12M0.35 uniquely supports direct connection to rectified AC mains (100–370 VDC) without isolation or external components - making it optimal for cost-sensitive, space-constrained industrial auxiliary supplies where safety isolation is handled at system level.
Availability
SPDC400FC12M0.35 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, appliance control boards, and telecom line card supervision requiring stable component supply and long-life design assurance.
Supply support for SPDC400FC12M0.35 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 devices for industrial, automotive, and consumer markets.
The SPDC400 series belongs to ST's legacy power module product line, engineered specifically for compact, high-input-voltage auxiliary power conversion in cost-sensitive industrial equipment where simplicity, reliability, and RoHS compliance are critical.
FAQ
Is SPDC400FC12M0.35 still in active production?
No - SPDC400FC12M0.35 is marked as Obsolete Product(s) in ST's official documentation (Doc ID 14008 Rev 4, May 2009). Aetrix Electronics maintains limited legacy stock with full traceability and offers engineering support for last-time buy and obsolescence mitigation planning.
Can SPDC400FC12M0.35 be used with AC input directly?
No - SPDC400FC12M0.35 requires DC input only. It must be paired with a bridge rectifier and bulk capacitor to convert 85–264 VAC mains to 100–370 VDC; no internal rectification or AC safety isolation is provided.
What is the meaning of "FC" and "M0.35" in the part number?
"FC" denotes Open Frame package with Comb-style termination; "M0.35" specifies a -12 V output with minus polarity and 0.35 A maximum rated output current - per ST's ordering scheme in Table 4 of Doc ID 14008.
Does SPDC400FC12M0.35 require input or output capacitors?
No - the module is fully self-contained. ST's datasheet confirms zero external components are needed for regulation or protection. Input bulk capacitance is required upstream (per rectifier stage), but no additional capacitors are specified at module terminals.
SPDC400FC12M0.35 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- SPDC400-4W
- Package/Case:
- Module
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 100V
- Voltage - Input (Max):
- 370V
- Voltage - Output 1:
- -12V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 350mA
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- -
- Operating Temperature:
- -10°C ~ 85°C
- Efficiency:
- 80%
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
SPDC400FC12M0.35 FAQ
1.How can I place an order for SPDC400FC12M0.35 through Aetrix?
Please submit a Request for Quotation (RFQ) for SPDC400FC12M0.35 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 SPDC400FC12M0.35 reliable?
The price and inventory of SPDC400FC12M0.35 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SPDC400FC12M0.35 is usually 5 days.
3.What payment methods are accepted for SPDC400FC12M0.35?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SPDC400FC12M0.35 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SPDC400FC12M0.35?
SPDC400FC12M0.35 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SPDC400FC12M0.35 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 SPDC400FC12M0.35?
For technical support, including SPDC400FC12M0.35 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SPDC400FC12M0.35 requirements.
6.How does Aetrix verify that SPDC400FC12M0.35 is sourced from the original manufacturer or authorized distributors?
All SPDC400FC12M0.35 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 SPDC400FC12M0.35 meets industry standards.
7.What is the process for return or replacement of SPDC400FC12M0.35?
All SPDC400FC12M0.35 units undergo pre-shipment inspection (PSI). If there is an issue with SPDC400FC12M0.35, 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 SPDC400FC12M0.35 part is unused and in its original packaging.
Return procedure for SPDC400FC12M0.35:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SPDC400FC12M0.35 Tags
-
1S4E_0505S1.5U
GAPTEC Electronic
-
TPS631000DRLR
Texas Instruments
-
XCL209F083DR
Torex Semiconductor Ltd
-
SC202AMLTRT
Semtech Corporation
-
NME1S0505SC
Murata Power Solutions Inc.
-
XCL101A501ER-G
Torex Semiconductor Ltd
-
RFM-0505S
Recom Power
-
TEA 1-0505E
Traco Power
-
MIC33153YHJ-TR
Microchip Technology
-
TEA 1-0505
Traco Power
-
TPSM863252RDXR
Texas Instruments
-
RFB-0505S
Recom Power
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
