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Diodes Incorporated SMBJ12A-13-F
- Part No.:
- SMBJ12A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ12A-13-F.pdf
- Description:
- TVS DIODE 12VWM 19.9VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:176,094
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Product details
Overview
SMBJ12A-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with 12V reverse standoff voltage, 13.3V minimum breakdown voltage, 19.9V maximum clamping voltage at 30.2A peak pulse current, and SMB package. It protects DC power rails and I/O lines in industrial control systems against ESD, lightning-induced surges, and inductive switching transients.
For engineers reviewing the SMBJ12A-13-F datasheet, SMBJ12A-13-F pinout, SMBJ12A-13-F application, or SMBJ12A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current capability under 8.3ms waveform, thermal derating above +25°C, and RoHS-compliant lead-free plating for reflow compatibility.
Technical Context
This TVS operates as a voltage-clamped shunt protector: when reverse voltage exceeds VRWM = 12V, it remains high-impedance until VBR ≥ 13.3V triggers avalanche conduction, limiting downstream voltage to ≤19.9V at IPP = 30.2A. Its glass-passivated die ensures stable breakdown characteristics across temperature.
Designed for single-pulse surge suppression per IEC 61000-4-5 (10/1000μs) and IEC 61000-4-2 (ESD), it delivers 600W peak pulse power with 4.8W/°C derating above +25°C ambient and supports steady-state dissipation of 5.0W at TL = +75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - Sustains single 8.3ms half-sine surge without failure; defines maximum energy absorption capability. |
| Reverse Standoff Voltage | 12.0V - Maximum continuous DC or RMS voltage before significant leakage; sets operating rail compatibility. |
| Breakdown Voltage | 13.3–15.3V @ 1.0mA - Confirmed avalanche initiation range; ensures reliable turn-on before protected circuit damage. |
| Clamping Voltage | 19.9V @ 30.2A - Maximum voltage seen by downstream IC during specified surge; determines safe margin over IC absolute max rating. |
| Peak Pulse Current | 30.2A - Peak current handled at VC = 19.9V; correlates directly with IEC 61000-4-5 Level 3 (1kV/2Ω) survivability. |
| Operating Temperature | −55°C to +150°C - Validated junction temperature range; enables use in automotive engine compartments and industrial enclosures. |
| Leakage Current | ≤5.0μA @ 12V - Low off-state current minimizes standby power loss and avoids false triggering in high-impedance circuits. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case rated UL 94V-0, 0.1g weight, matte tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-to-cathode polarity reference | Identifies cathode terminal for unidirectional operation; must connect to protected line, anode to ground. |
| Anode | Reference node / return path | Connected to system ground or low-impedance return; completes clamping path during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse power | Enables robust protection against high-energy surges (e.g., 1kV/2Ω IEC 61000-4-5) without thermal runaway. |
| Glass-passivated die construction | Ensures stable, repeatable breakdown voltage and long-term reliability under repeated surge stress. |
| Lead-free, RoHS-compliant finish | Supports Pb-free reflow profiles (JEDEC J-STD-020) and meets global environmental compliance requirements. |
| UL 94V-0 flammability rating | Confirms flame-retardant encapsulation suitable for safety-critical industrial and building automation equipment. |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 24V digital input channels in programmable logic controllers from field-wiring induced surges and contact bounce. IC Role / Device Role / Timing Role: Shunt clamping device placed between input terminal and ground, activated within nanoseconds upon overvoltage detection. Use Value: Limits transient voltage to ≤19.9V, preserving integrity of 3.3V/5V level-shifters and microcontroller GPIOs rated for 20V absolute max. |
Use Scenario: Safeguarding LIN bus transceivers and sensor supply lines in body electronics modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Fast-response voltage clamp on 12V supply rail and LIN signal line, triggered before transceiver damage threshold. Use Value: Withstands 30.2A peak current at 19.9V clamping, meeting ISO 7637-2 Pulse 1 (−150V/2Ω) immunity requirements. |
| Power Over Ethernet (PoE) PSE Interface | Smart Meter Communication Port |
Use Scenario: Secondary surge protection on PoE power sourcing equipment (PSE) output pairs prior to magnetics and DC-DC conversion. IC Role / Device Role / Timing Role: Parallel-connected TVS on each 48V pair, clamping fast-rising common-mode transients from cable coupling. Use Value: 600W rating handles combined differential + common-mode surges up to 10/1000μs waveform without degradation. |
Use Scenario: Protecting RS-485 and M-Bus communication ports in utility smart meters installed in outdoor electrical cabinets. IC Role / Device Role / Timing Role: Line-to-ground TVS on differential data lines, activated during lightning-induced ground potential rise events. Use Value: −55°C to +150°C operating range ensures functionality during extreme ambient conditions encountered in meter enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA-13-F | Bi-directional version with symmetric ±12V standoff and same 19.9V clamping; higher capacitance due to dual-junction structure. | Required for AC-coupled or bidirectional signal lines (e.g., RS-485, CAN); unsuitable for DC rail protection where polarity matters. | Select only if protecting balanced differential signals or AC power inputs; avoid for unidirectional DC rails. |
| SMAJ12A-13-F | Lower 400W peak power rating, identical 12V VRWM and 19.9V VC, but reduced 20.5A IPP; SMA package has lower thermal mass. | Acceptable for lower-energy threats (e.g., IEC 61000-4-2 ESD only); insufficient for IEC 61000-4-5 Level 3+ surges. | Choose when cost or board space is critical and surge threat level is confirmed ≤400W; verify thermal design margin. |
Compared with SMBJ12CA-13-F and SMAJ12A-13-F, SMBJ12A-13-F provides optimal balance of 600W surge capacity, unidirectional DC rail compatibility, and SMB footprint-making it preferred for industrial 24V systems where polarity-defined clamping and high-energy immunity are mandatory.
Availability
SMBJ12A-13-F is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and Power over Ethernet (PoE) PSE interfaces requiring stable component supply, consistent parametric performance, and full traceability.
Supply support for SMBJ12A-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, specializing in high-reliability protection, power management, and signal integrity solutions for industrial, computing, and automotive markets.
SMBJ12A-13-F belongs to Diodes' SMBJ series of surface-mount TVS diodes, engineered specifically for high-power transient suppression in harsh environments where robustness, consistency, and regulatory compliance are non-negotiable.
FAQ
What is the maximum clamping voltage of SMBJ12A-13-F at its rated peak pulse current?
The maximum clamping voltage is 19.9V at 30.2A peak pulse current (IPP) under 8.3ms single half-sine waveform conditions. This value is measured per JEDEC standards and guarantees that downstream components experience no more than 19.9V during a defined surge event, provided layout minimizes parasitic inductance.
Can SMBJ12A-13-F be used in bidirectional signal lines like RS-485?
No-SMBJ12A-13-F is unidirectional and will conduct only when cathode is positive relative to anode. For RS-485 or other bidirectional lines, the bi-directional variant SMBJ12CA-13-F must be used, as it clamps symmetrically for both polarities of transient voltage.
How does thermal derating affect SMBJ12A-13-F's surge capability above +25°C ambient?
Its peak pulse power derates linearly at 4.8W/°C above +25°C. At +75°C ambient, maximum allowable peak pulse power drops to 360W (600W − 4.8W × 50°C), reducing sustainable IPP proportionally-requiring design verification for high-temperature deployments.
Is SMBJ12A-13-F compatible with lead-free reflow soldering processes?
Yes-it features matte tin-plated terminals qualified to MIL-STD-202 Method 208 and rated for standard Pb-free reflow profiles (peak temperature ≤260°C). Its UL 94V-0 mold compound withstands multiple reflow cycles without delamination or parameter shift.
SMBJ12A-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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 30.2A
- 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
SMBJ12A-13-F FAQ
1.How can I place an order for SMBJ12A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ12A-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 SMBJ12A-13-F reliable?
The price and inventory of SMBJ12A-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 SMBJ12A-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ12A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ12A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ12A-13-F?
SMBJ12A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ12A-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 SMBJ12A-13-F?
For technical support, including SMBJ12A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ12A-13-F requirements.
6.How does Aetrix verify that SMBJ12A-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ12A-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 SMBJ12A-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ12A-13-F?
All SMBJ12A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ12A-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 SMBJ12A-13-F part is unused and in its original packaging.
Return procedure for SMBJ12A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ12A-13-F Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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