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Diodes Incorporated MSB08M-13
- Part No.:
- MSB08M-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SMD, Flat Leads
- Datasheet:
-
MSB08M-13.pdf
- Description:
- BRIDGE RECT 1P 1KV 800MA 4-MSB
- Quantity:
- Payment:
- Shipping:
Inventory:9,645
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Product details
Overview
MSB08M from Diodes Incorporated is a glass passivated surface-mount bridge rectifier rated for 1000 V peak repetitive reverse voltage, 0.8 A average output current at TC = +120°C, and 1.05 V forward voltage at 0.8 A. It performs full-wave AC-to-DC rectification in compact SMT power supplies for LED lighting and battery chargers.
For engineers reviewing the MSB08M datasheet, MSB08M pinout, MSB08M application, or MSB08M equivalent, key selection criteria include its 1000 V VRRM rating, thermal resistance (RθJC = 12 °C/W), 30 A non-repetitive surge capability, and MSB package compatibility with automated assembly.
Technical Context
This discrete bridge rectifier integrates four diodes in a single-phase full-wave configuration with glass-passivated junctions for enhanced reliability under transient stress. Its internal schematic shows standard bridge topology with marked polarity and designated AC input terminals (Pins 2 & 4) and DC output terminals (Pin 1 = +, Pin 3 = –).
Designed for high-voltage, low-current SMPS front ends, it supports operation from –55°C to +150°C and exhibits 10 pF typical junction capacitance at 4 V reverse bias and 1 MHz - critical for EMI-sensitive switch-mode applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - Withstands peak reverse voltage in AC line inputs up to 700 V RMS without breakdown |
| IO (at TC = +120°C) | 0.8 A - Continuous DC output current when case temperature is maintained at 120°C |
| VF (at IF = 0.8 A) | 1.05 V - Forward conduction loss directly impacts efficiency and thermal rise in compact adapters |
| IFSM (8.3 ms) | 30 A - Handles inrush surges during cold-start of capacitive-input SMPS without failure |
| RθJC | 12 °C/W - Enables direct thermal coupling to PCB copper for effective heat dissipation in space-constrained layouts |
| CT (at VR = 4 V, f = 1 MHz) | 10 pF - Low junction capacitance minimizes switching noise and improves EMI performance |
| IR (at VR = 1000 V, TA = +25°C) | 5 µA - Low leakage preserves no-load efficiency and prevents unintended discharge in standby mode |
Pinout & Package
Package: MSB - Surface-mount, 4-pin, compact molded plastic body (4.5 × 5.0 × 1.2 mm), UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | DC Output Anode (+) | Positive DC output terminal; connects to bulk capacitor positive rail in bridge configuration |
| Pin 2 | AC Input (1) | One AC input terminal; tied to transformer secondary or AC line input in full-wave rectification |
| Pin 3 | DC Output Cathode (–) | Negative DC output terminal; common return path for rectified output current |
| Pin 4 | AC Input (2) | Second AC input terminal; completes AC input pair with Pin 2 for full-wave operation |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die construction | Improves long-term reliability under humidity and thermal cycling vs. epoxy-passivated alternatives |
| Compact thin-profile MSB package | Enables high-density PCB layouts in slim LED drivers and wall-wart adapters |
| Lead-free, RoHS-compliant finish | Meets global environmental compliance requirements without compromising solderability or thermal performance |
| Halogen- and antimony-free "Green" material | Contains <900 ppm Br, <900 ppm Cl, and <1000 ppm Sb - satisfies stringent eco-regulatory mandates |
Applications
| LED Lighting Power Supplies | Battery Chargers |
|---|---|
Use Scenario: AC-input offline LED driver for residential/commercial luminaires with universal 90–264 VAC input. IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting AC line to pulsating DC prior to PFC and DC-DC stages. Use Value: 1000 V VRRM ensures margin against line transients; low VF reduces conduction loss in thermally limited enclosures. | Use Scenario: Compact USB-C PD or multi-chemistry battery charger with AC/DC front-end. IC Role / Device Role / Timing Role: Primary-side rectification element delivering unregulated DC bus to downstream controller ICs. Use Value: MSB package footprint enables miniaturized PCBs; 30 A IFSM withstands repeated plug-in surges. |
| Office Equipment Adapters | Home Appliance Power Modules |
Use Scenario: External AC adapter powering printers, monitors, or VoIP phones with strict size constraints. IC Role / Device Role / Timing Role: Surface-mount bridge rectifier in low-noise, low-leakage AC/DC conversion stage. Use Value: 5 µA IR at 1000 V minimizes standby power draw; RθJC = 12 °C/W supports passive cooling. | Use Scenario: Integrated power supply in smart washing machines, microwaves, or HVAC controllers. IC Role / Device Role / Timing Role: Robust front-end rectifier handling wide input voltage ranges and industrial-grade thermal cycling. Use Value: –55°C to +150°C operating range ensures reliability across ambient extremes; glass passivation resists moisture ingress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ABS10A | Higher IO (1.0 A), same VRRM (1000 V), slightly larger ABS package (4.9 × 4.2 × 2.3 mm) | Better thermal headroom for higher-power adapters; requires revised PCB pad layout | Select ABS10A when >0.8 A continuous current or improved thermal margin is required |
| GBU4K | Same IO (0.8 A), higher VRRM (800 V → 1000 V), GBU through-hole package (18.5 × 13.5 × 4.5 mm) | Not SMT-compatible; used where manual assembly or mechanical robustness outweighs size constraints | Choose GBU4K only if through-hole mounting is mandated and board space is not limiting |
Compared with ABS10A and GBU4K, MSB08M offers the smallest footprint among 1000 V-rated bridge rectifiers but requires careful thermal management due to its low RθJC and compact MSB package - ideal for ultra-thin consumer power supplies where volume is prioritized over derated current headroom.
Availability
MSB08M is available at Aetrix Electronics and suitable for LED lighting power supplies, battery chargers, and office equipment adapters requiring stable component supply and RoHS-compliant SMT rectification.
Supply support for MSB08M 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The MSB series belongs to Diodes' high-voltage bridge rectifier product line, engineered specifically for space-constrained, high-efficiency AC/DC conversion in consumer and industrial power supplies.
FAQ
Is MSB08M still in active production?
No - MSB08M is officially obsolete per Diodes' datasheet (Rev. 6-4, March 2022). It has been discontinued and replaced by ABS10A for new designs. Aetrix Electronics maintains limited legacy stock for repair and continuity support but does not recommend it for new product introductions.
What is the maximum recommended PCB copper area for thermal relief?
Per datasheet Note 5, a 20 mm × 20 mm, 1 oz copper pad per pin achieves the specified RθJA of 80 °C/W. For optimal thermal performance, extend copper pours under Pins 1 and 3 (DC outputs) and connect them to internal ground/power planes using multiple thermal vias.
Can MSB08M be used in automotive applications?
No - MSB08M is not AEC-Q200 qualified and lacks PPAP documentation. Diodes explicitly states that automotive use requires contacting their representative for AEC-qualified alternatives. Its –55°C to +150°C rating alone does not satisfy automotive qualification requirements.
How is polarity marked on the MSB08M package?
Polarity is marked on the top surface: a green dot or "+" symbol adjacent to Pin 1 identifies the DC anode (+) output. The cathode (–) is Pin 3. The AC input pins (2 and 4) are unmarked but positioned diagonally opposite Pin 1 and Pin 3 per the official MSB outline drawing.
MSB08M-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-SMD, Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 1 kV
- Current - Average Rectified (Io):
- 800 mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.05 V @ 800 mA
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1000 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-MSB
MSB08M-13 FAQ
1.How can I place an order for MSB08M-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for MSB08M-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 MSB08M-13 reliable?
The price and inventory of MSB08M-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSB08M-13 is usually 5 days.
3.What payment methods are accepted for MSB08M-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSB08M-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSB08M-13?
MSB08M-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSB08M-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 MSB08M-13?
For technical support, including MSB08M-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSB08M-13 requirements.
6.How does Aetrix verify that MSB08M-13 is sourced from the original manufacturer or authorized distributors?
All MSB08M-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 MSB08M-13 meets industry standards.
7.What is the process for return or replacement of MSB08M-13?
All MSB08M-13 units undergo pre-shipment inspection (PSI). If there is an issue with MSB08M-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 MSB08M-13 part is unused and in its original packaging.
Return procedure for MSB08M-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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