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Diodes Incorporated SMBJ48A-13-F
- Part No.:
- SMBJ48A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48A-13-F.pdf
- Description:
- TVS DIODE 48VWM 77.4VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:33,770
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Product details
Overview
SMBJ48A-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with 48V reverse standoff voltage, 53.3V minimum breakdown voltage at 1mA, 77.4V maximum clamping voltage at 7.7A peak pulse current, and SMB package. It protects DC power rails in industrial motor drives against IEC 61000-4-5 surge events.
For engineers reviewing the SMBJ48A-13-F datasheet, SMBJ48A-13-F pinout, SMBJ48A-13-F application, or SMBJ48A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current capability under 8.3ms half-sine waveform, thermal derating above +25°C, and RoHS-compliant matte tin plating for lead-free reflow compatibility.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal bias (VRWM = 48V), leakage remains ≤5μA; during transients exceeding VBR (min 53.3V), it avalanches to clamp at ≤77.4V while conducting up to 7.7A. Its glass-passivated junction ensures stable breakdown and low capacitance (≈100pF at 1MHz, zero bias).
The device uses a single PN junction in SMB plastic case rated UL 94V-0, with cathode band polarity marking. Thermal resistance from junction-to-lead is optimized for 5.0W steady-state dissipation at TL = +75°C, and pulse derating follows linear 4.8W/°C above +25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 8.3ms surge without failure per IEC 61000-4-5 Level 4 |
| Reverse Standoff Voltage | 48V - maximum continuous DC voltage before significant leakage begins |
| Breakdown Voltage | 53.3–61.3V @ 1mA - defines precise avalanche initiation threshold for clamping onset |
| Clamping Voltage | 77.4V @ 7.7A - maximum voltage seen by downstream circuit during specified surge |
| Leakage Current | ≤5μA @ 48V - ensures minimal power loss and signal integrity on standby rails |
| Junction Temperature Range | −55°C to +150°C - supports operation in automotive engine bays and industrial enclosures |
| Package | SMB - standardized surface-mount footprint compatible with automated PCB assembly |
Pinout & Package
Package: SMB (Surface Mount Body), molded plastic case per JEDEC DO-214AA, UL 94V-0 flammability rating, 0.1g weight, matte tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line; conducts surge current to ground when voltage exceeds VBR |
| Anode | Reference node | Typically tied to system ground or low-impedance return path for clamping loop closure |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse power | Enables robust protection against high-energy surges (e.g., 4kV/2Ω IEC 61000-4-5) |
| Glass passivated die | Ensures stable VBR tolerance and long-term reliability under thermal cycling |
| Lead-free & RoHS compliant | Meets global environmental regulations and supports Pb-free reflow profiles (JEDEC J-STD-020) |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on protected 48V-rated components like gate drivers or CAN transceivers |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: 48V DC bus in variable-frequency drives exposed to switching transients and lightning-induced surges. IC Role / Device Role: Unidirectional shunt TVS placed across input capacitor to clamp positive-going transients. Use Value: Limits bus overvoltage to 77.4V, preventing damage to 100V-rated MOSFETs and isolated gate drivers. | Use Scenario: Secondary-side 48V output rail in telecom rectifiers subject to load dump and hot-swap events. IC Role / Device Role: Primary overvoltage clamp protecting DC-DC controllers and PMBus monitoring ICs. Use Value: Maintains rail integrity below 80V during 10A/10ms surges, avoiding brownout resets in management ASICs. |
| Automotive Body Control Modules | Factory Automation I/O Modules |
Use Scenario: 48V auxiliary power distribution in 48V mild-hybrid ECUs connected to LIN/CAN networks. IC Role / Device Role: Line-side TVS on power entry to suppress coupled transients from solenoid actuation. Use Value: Clamps induced spikes to <78V, preserving signal integrity of 5V logic supplies derived from the 48V rail. | Use Scenario: Digital input conditioning circuits receiving 24–48V dry-contact signals in PLC backplanes. IC Role / Device Role: Input-stage protector on optocoupler front-end to absorb field-wiring ESD and inductive kickback. Use Value: Absorbs >600W pulses without degradation, enabling >100,000-cycle reliability in harsh factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48AHE3/52 (Vishay) | Same 48V VRWM, 77.4V VC, but AEC-Q200 qualified and tighter VBR tolerance (5% vs. Diodes' 12%) | Required for automotive-grade designs needing qualification evidence | Select when AEC-Q200 compliance is mandatory; otherwise Diodes part offers cost advantage |
| P6SMB48A (ON Semiconductor) | Identical electrical specs and SMB package, but legacy marking and longer lead time (12+ weeks) | Suitable for legacy BOM refresh where cross-reference is documented | Prefer for continuity in existing designs; avoid for new designs due to supply constraints |
Compared with SMBJ48AHE3/52 and P6SMB48A, the SMBJ48A-13-F delivers identical clamping performance at lower cost and shorter lead time, with full RoHS/Green compliance-making it optimal for industrial and telecom applications where AEC-Q200 is not required.
Availability
SMBJ48A-13-F is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and factory automation I/O modules requiring stable component supply and consistent surge immunity performance.
Supply support for SMBJ48A-13-F 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 the Americas.
The SMBJ series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for high-reliability DC rail protection in industrial, telecom, and automotive systems where fast response, low clamping, and robust surge handling are critical.
FAQ
What is the maximum clamping voltage of SMBJ48A-13-F at its rated peak pulse current?
The maximum clamping voltage is 77.4V at 7.7A peak pulse current (IPP), measured using an 8.3ms single half-sine waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (−55°C to +150°C) and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMBJ48A-13-F unidirectional or bidirectional, and how is polarity identified?
SMBJ48A-13-F is unidirectional, indicated by the absence of "C" in the part number (e.g., SMBJ48CA would be bidirectional). Polarity is marked by a cathode band at one end of the SMB package; this banded terminal must be connected to the line being protected, while the anode connects to ground or the reference node.
What is the thermal derating behavior above +25°C ambient temperature?
Above +25°C, the peak pulse power derates linearly at 4.8W/°C, and steady-state power dissipation derates from 5.0W at TL = +75°C. The junction-to-lead thermal resistance is fixed, so board layout-especially copper area under the pad-directly impacts actual thermal performance during repetitive surges.
Does SMBJ48A-13-F meet halogen-free and antimony-free "Green" requirements?
Yes. SMBJ48A-13-F is certified halogen- and antimony-free per Diodes Incorporated's Green definition: <900ppm bromine, <900ppm chlorine (total Br + Cl <1500ppm), and <1000ppm antimony compounds. This is verified in the device's material declaration and aligns with IPC-1752 standards.
SMBJ48A-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 7.7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
SMBJ48A-13-F FAQ
1.How can I place an order for SMBJ48A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48A-13-F 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 SMBJ48A-13-F reliable?
The price and inventory of SMBJ48A-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ48A-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ48A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48A-13-F?
SMBJ48A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48A-13-F 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 SMBJ48A-13-F?
For technical support, including SMBJ48A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48A-13-F requirements.
6.How does Aetrix verify that SMBJ48A-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ48A-13-F 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 SMBJ48A-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ48A-13-F?
All SMBJ48A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48A-13-F, 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 SMBJ48A-13-F part is unused and in its original packaging.
Return procedure for SMBJ48A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48A-13-F Tags
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