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Diodes Incorporated S8MCQ-13
- Part No.:
- S8MCQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
S8MCQ-13.pdf
- Description:
- DIODE GEN PURP 1KV 8A SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,865
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Product details
Overview
S8MCQ-13 from Diodes Incorporated is an 8.0A, 1000V glass passivated surface-mount rectifier diode in SMC package, featuring 0.985V forward voltage at 8.0A, 10μA reverse leakage at 25°C, and AEC-Q101 qualification for automotive power conversion systems.
For engineers reviewing the S8MCQ-13 datasheet, S8MCQ-13 pinout, S8MCQ-13 application, or S8MCQ-13 equivalent, this part supports high-reliability DC/DC front-end rectification, EMI-critical AC-DC adapters, and under-hood automotive power supplies where surge immunity and thermal stability are critical.
Technical Context
This device operates as a single-phase, half-wave silicon rectifier with guard ring structure for transient protection. Its 200A non-repetitive surge rating (8.3ms) and 450A peak surge (1.0ms) enable robust operation in line-powered industrial SMPS and automotive alternator output stages.
Thermal resistance is specified at 10°C/W (junction-to-terminal) on a 100.5mm × 102.5mm Cu heatsink, supporting continuous 8.0A conduction at terminal temperature ≤75°C. Reverse recovery time is 2700ns, confirming soft-recovery behavior suitable for moderate-frequency switching applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - Maximum repetitive reverse voltage before breakdown; defines safe blocking capability in 800V AC line applications. |
| IO @ TT=75°C | 8.0 A - Continuous average forward current rating at terminal temperature of 75°C; sets PCB copper area and heatsinking requirements. |
| VF @ IF=8.0A | 0.985 V - Forward voltage drop at rated current; determines conduction loss (7.88W) and thermal design margin. |
| IRM @ 25°C | 10 μA - Peak reverse leakage at 25°C; ensures low standby power loss in high-impedance bias networks. |
| IFSM (8.3ms) | 200 A - Non-repetitive surge current rating; validates robustness against inrush and lightning-induced transients. |
| tRR | 2700 ns - Reverse recovery time; limits switching frequency to ≤100 kHz in hard-switched topologies. |
| RθJT | 10 °C/W - Junction-to-terminal thermal resistance; enables direct heatsink mounting without isolation pads for improved thermal transfer. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with UL 94V-0 flammability rating, matte tin-plated terminals, cathode band polarity marking, and 0.21g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current input | Connected to AC source or transformer secondary; must withstand full surge current and reverse voltage stress. |
| Cathode | Forward current output / reverse blocking node | Connected to bulk capacitor or load; marked by visible band; carries full output current and defines ground reference path. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die construction | Eliminates moisture ingress and surface contamination risks, enabling stable long-term performance in humid or chemically aggressive environments. |
| Guard ring for transient protection | Prevents edge breakdown during voltage surges, improving reliability in unfiltered AC line inputs and motor drive freewheeling paths. |
| AEC-Q101 qualification | Validates operation across -65°C to +150°C with PPAP documentation support, meeting automotive power module and body control unit requirements. |
| Lead-free, halogen-free "Green" construction | Complies with RoHS 3 (2015/863/EU) and IATF 16949 manufacturing standards, eliminating antimony/bromine/chlorine restrictions for global supply chain compliance. |
Applications
| Automotive Alternator Output Rectification | Industrial AC-DC Power Supplies |
|---|---|
Use Scenario: Rectifying three-phase alternator output in 12V/24V vehicle electrical systems with high ambient temperature and vibration exposure. IC Role / Device Role / Timing Role: High-current, high-surge rectifier handling up to 200A short-duration alternator field collapse events. Use Value: AEC-Q101 qualification and 150°C max junction temperature ensure uninterrupted operation under hood temperatures exceeding 105°C. | Use Scenario: Input stage rectification in 500W industrial switch-mode power supplies with universal AC input (85–265VAC). IC Role / Device Role / Timing Role: Primary-side uncontrolled rectifier delivering 8A average DC bus current with minimal conduction loss. Use Value: 0.985V VF at 8A reduces heat generation by ~12% vs. comparable 1.1V diodes, lowering heatsink size and system cost. |
| EMI-Sensitive Medical AC Adapters | Motor Drive Freewheeling Paths |
Use Scenario: Bridge rectification in Class II medical-grade AC/DC adapters where low leakage and low capacitance are required to meet IEC 60601-1 creepage/clearance and EMI limits. IC Role / Device Role / Timing Role: Low-leakage (10μA), low-capacitance (45pF) rectifier minimizing common-mode noise injection into sensitive analog circuits. Use Value: 45pF typical junction capacitance reduces high-frequency coupling into feedback networks, easing EMI filter design. | Use Scenario: Freewheeling diode across brushed DC motor windings in factory automation controllers subject to frequent direction reversal and inductive kickback. IC Role / Device Role / Timing Role: Transient-energy clamping device absorbing 450A (1ms) inductive spikes during PWM commutation. Use Value: 450A 1ms surge rating exceeds typical motor stall currents, preventing catastrophic failure during emergency stops. |
Availability
S8MCQ-13 is available at Aetrix Electronics and suitable for automotive alternator modules, industrial AC-DC power supplies, EMI-sensitive medical adapters, and motor drive freewheeling paths requiring stable component supply and AEC-Q101 traceability.
Supply support for S8MCQ-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and computing markets.
The S8MCQ series belongs to Diodes' high-current, high-voltage rectifier product line, engineered specifically for automotive-grade power conversion and industrial power supply applications demanding AEC-Q101 validation and surge resilience.
FAQ
What is the maximum operating junction temperature for S8MCQ-13?
The S8MCQ-13 has a specified operating junction temperature range of –65°C to +150°C. This wide range supports under-hood automotive use and high-ambient industrial environments. Thermal design must ensure junction temperature remains within this limit using the 10°C/W RθJT value and appropriate heatsinking.
Is S8MCQ-13 compatible with lead-free reflow soldering processes?
Yes. S8MCQ-13 features matte tin-plated terminals and is qualified per J-STD-020 Level 1 moisture sensitivity. It supports standard lead-free reflow profiles (peak 260°C) without degradation, and its UL 94V-0 mold compound withstands repeated thermal cycling.
How does the guard ring structure improve reliability in S8MCQ-13?
The integrated guard ring prevents premature edge breakdown during high dv/dt transients by redistributing electric field stress away from the silicon periphery. This extends device lifetime in applications exposed to line surges, motor commutation spikes, and unclamped inductive loads.
Can S8MCQ-13 replace S8M in existing designs?
S8MCQ-13 offers identical VRRM (1000V), IO (8A), and VF (0.985V) ratings as S8M but adds AEC-Q101 qualification, guard ring, and green material compliance. Pin-compatible and electrically interchangeable, it provides enhanced reliability for automotive and industrial upgrades without layout changes.
S8MCQ-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1000 V
- Current - Average Rectified (Io):
- 8A
- Voltage - Forward (Vf) (Max) @ If:
- 985 mV @ 8 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2.7 µs
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1000 V
- Capacitance @ Vr, F:
- 45pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
- Operating Temperature - Junction:
- -65°C ~ 150°C
S8MCQ-13 FAQ
1.How can I place an order for S8MCQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for S8MCQ-13 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 S8MCQ-13 reliable?
The price and inventory of S8MCQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S8MCQ-13 is usually 5 days.
3.What payment methods are accepted for S8MCQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S8MCQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S8MCQ-13?
S8MCQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S8MCQ-13 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 S8MCQ-13?
For technical support, including S8MCQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S8MCQ-13 requirements.
6.How does Aetrix verify that S8MCQ-13 is sourced from the original manufacturer or authorized distributors?
All S8MCQ-13 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 S8MCQ-13 meets industry standards.
7.What is the process for return or replacement of S8MCQ-13?
All S8MCQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with S8MCQ-13, 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 S8MCQ-13 part is unused and in its original packaging.
Return procedure for S8MCQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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