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Diodes Incorporated SMBJ51CA-13-F
- Part No.:
- SMBJ51CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ51CA-13-F.pdf
- Description:
- TVS DIODE 51VWM 82.4VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:133,459
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Product details
Overview
SMBJ51CA-13-F from Diodes Incorporated is a bi-directional 600W surface-mount transient voltage suppressor (TVS) diode with 51V reverse standoff voltage, 82.4V max clamping voltage at 7.3A peak pulse current, and SMB package. It protects DC power rails and data lines in industrial motor drives, PoE-powered devices, and automotive body electronics against ESD, lightning-induced surges, and inductive switching transients.
For engineers reviewing the SMBJ51CA-13-F datasheet, SMBJ51CA-13-F pinout, SMBJ51CA-13-F application, or SMBJ51CA-13-F equivalent, key selection criteria include clamping voltage margin relative to system operating voltage, peak pulse current capability under 8.3ms half-sine waveform, thermal derating above +25°C, and bi-directional symmetry for AC-coupled signal line protection.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds 51V standoff, it avalanches into low-impedance conduction, limiting downstream voltage to ≤82.4V. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<5μA at 51V).
The device handles non-repetitive 8.3ms half-sine surges up to 7.3A while maintaining clamping performance across -55°C to +150°C junction temperature. Its SMB package supports automated SMT assembly and provides 4.8W/°C thermal derating above +25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 8.3ms surge without failure; defines maximum energy absorption capacity |
| Reverse Standoff Voltage | 51V - maximum continuous DC or RMS voltage before clamping initiates; sets operating voltage ceiling |
| Max Clamping Voltage | 82.4V @ 7.3A - limits transient voltage seen by protected ICs; must be below downstream component absolute max rating |
| Breakdown Voltage | 56.7–65.2V @ 1mA - tight VBR window ensures consistent turn-on threshold across production lots |
| Leakage Current | ≤5μA @ 51V - negligible standby power loss and minimal impact on high-impedance sensing circuits |
| Package | SMB - standardized surface-mount outline (5.59mm × 4.57mm × 2.21mm); compatible with IPC-7351B footprint |
| Operating Temp | -55°C to +150°C - enables use in under-hood automotive, industrial PLC, and outdoor telecom equipment |
Pinout & Package
Bi-directional SMBJ51CA-13-F has two symmetrical terminals in the SMB package: no polarity marking, no cathode band. Both terminals function identically as bidirectional surge paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Either terminal conducts avalanche current during positive or negative overvoltage events; no directional bias required |
| Case (exposed pad) | Thermal conduction path | Not electrically connected; serves only mechanical mounting and heat dissipation to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 (4kV surge) on 24V/48V industrial buses |
| Glass-passivated die | Ensures long-term parameter stability and low parametric drift under thermal cycling and humidity stress |
| Bi-directional configuration | Supports AC signal lines (RS-485, CAN, Ethernet PHY), audio interfaces, and dual-rail power inputs without polarity concerns |
| RoHS-compliant & halogen-free | Fulfills EU RoHS 2 and JEDEC J-STD-709 requirements for green electronics manufacturing and end-of-life recycling |
Applications
| Industrial Motor Drives | Power over Ethernet (PoE) |
|---|---|
Use Scenario: Protection of 48V DC bus and gate driver control signals against inductive kickback from BLDC motor commutation. IC Role / Device Role / Timing Role: Shunt TVS placed directly across bus input and near gate driver ICs to clamp transients within 1ns response time. Use Value: Prevents latch-up or permanent damage to MOSFET drivers and microcontrollers during rapid load dump events. |
Use Scenario: Surge suppression on IEEE 802.3af/at PSE/PD interface where 44–57V DC power and data coexist on same pair. IC Role / Device Role / Timing Role: Bi-directional clamping element on data+ and data− lines to absorb common-mode surges without disrupting DC bias. Use Value: Maintains signal integrity during lightning-induced surges while preserving PoE classification and power negotiation. |
| Automotive Body Control Modules | Industrial PLC Analog I/O |
Use Scenario: Protection of LIN bus transceivers and LED driver outputs exposed to load dump (ISO 7637-2 Pulse 5a) in door modules and lighting ECUs. IC Role / Device Role / Timing Role: Primary front-end TVS on supply rail and LIN signal line, placed before local LDO regulators. Use Value: Limits voltage excursion to <85V during 12V system load dump, keeping downstream 5V logic within safe operating area. |
Use Scenario: Guarding 4–20mA current loop inputs and ±10V analog outputs in programmable logic controllers subjected to field wiring faults. IC Role / Device Role / Timing Role: Bidirectional clamping device across differential analog inputs to suppress EFT bursts (IEC 61000-4-4) and cable discharge events. Use Value: Prevents ADC saturation and op-amp output latch-up while maintaining <0.1% gain error under repeated 2kV EFT exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA from Vishay (SMBJ51CA-E3/5AT) | Identical 51V standoff, 82.4V clamping, and 600W rating; ±5% VBR tolerance vs. Diodes' ±3.5% typical spread | Same SMB footprint and bi-directional function; slightly higher IR (10μA max vs. 5μA) at VRWM | Preferred where Vishay's AEC-Q200 qualified variants are mandated for automotive qualification programs |
| P6SMB51CA from ON Semiconductor | Same electrical specs and SMB package; 1000W peak power option available (P6SMBJ series), but standard P6SMB51CA rated at 600W | Compatible pinout and thermal profile; different date code marking and tape/reel packaging (2500 vs. 3000 per reel) | Select when existing BOM uses ON Semi's P6SMBx family and sourcing continuity with legacy designs is prioritized |
Compared with SMBJ51CA-13-F, Vishay's SMBJ51CA offers broader qualification coverage for automotive, while ON Semi's P6SMB51CA provides tighter alignment with legacy P6SMB design-in history-both require verification of clamping consistency under actual board-level surge waveforms.
Availability
SMBJ51CA-13-F is available at Aetrix Electronics and suitable for industrial motor drives, Power over Ethernet systems, and automotive body control modules requiring stable component supply and full traceability through J-STD-020 moisture sensitivity level 1 handling.
Supply support for SMBJ51CA-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 centers across Asia and manufacturing in China, Taiwan, and the U.S.
This SMBJ series targets board-level ESD and surge protection in cost-sensitive, high-volume applications including industrial automation, computing peripherals, and automotive subsystems-designed for reliability under harsh thermal and electrical stress.
FAQ
What is the difference between SMBJ51CA-13-F and SMBJ51A-13-F?
SMBJ51CA-13-F is bi-directional (denoted by "C"), meaning it clamps both positive and negative transients symmetrically-ideal for AC-coupled lines like RS-485 or Ethernet. SMBJ51A-13-F is uni-directional, with a cathode band marking and asymmetric clamping; it conducts only during reverse-biased overvoltage, making it suitable for DC rail protection where polarity is fixed.
Can SMBJ51CA-13-F be used in place of a 5V TVS for USB port protection?
No-SMBJ51CA-13-F has a 51V standoff and 82.4V clamping voltage, far exceeding the 5.5V absolute maximum rating of USB transceivers. Using it would allow destructive overvoltage to reach connected ICs. For USB 2.0/3.0, a 5.0V-rated TVS like SMBJ5.0CA with ≤15V clamping is required to ensure proper protection margin.
Does this device require a heatsink for 600W pulse handling?
No external heatsink is needed for single-pulse operation-the 600W rating applies to non-repetitive 8.3ms surges. The SMB package relies on PCB copper area for thermal dissipation during pulse events. However, steady-state power dissipation is limited to 5.0W at TL = +75°C, so continuous DC power handling remains low and does not involve the 600W rating.
How does the "-13-F" suffix affect solderability and reliability?
The "-13-F" suffix indicates 3,000-unit tape-and-reel packaging with lead-free (matte tin) plating compliant with RoHS and JEDEC J-STD-020 Level 1 moisture sensitivity. This ensures compatibility with standard reflow profiles (peak 260°C), eliminates post-solder cleaning, and guarantees solder joint integrity without voiding or dewetting under IPC-A-610 Class 2 requirements.
SMBJ51CA-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 7.3A
- 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
SMBJ51CA-13-F FAQ
1.How can I place an order for SMBJ51CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ51CA-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 SMBJ51CA-13-F reliable?
The price and inventory of SMBJ51CA-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 SMBJ51CA-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ51CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ51CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ51CA-13-F?
SMBJ51CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ51CA-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 SMBJ51CA-13-F?
For technical support, including SMBJ51CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ51CA-13-F requirements.
6.How does Aetrix verify that SMBJ51CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ51CA-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 SMBJ51CA-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ51CA-13-F?
All SMBJ51CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ51CA-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 SMBJ51CA-13-F part is unused and in its original packaging.
Return procedure for SMBJ51CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ51CA-13-F Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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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