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Diodes Incorporated SMBJ30CA-13-F
- Part No.:
- SMBJ30CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30CA-13-F.pdf
- Description:
- TVS DIODE 30VWM 48.4VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:57,933
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Product details
Overview
SMBJ30CA-13-F from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in SMB package, rated for 600W peak pulse power, 30V reverse standoff voltage (VRWM), 48.4V max clamping voltage at 12.4A IPP, and operating from –55°C to +150°C. It protects DC power rails and data lines in industrial motor drives against ESD and lightning-induced surges.
For engineers reviewing the SMBJ30CA-13-F datasheet, SMBJ30CA-13-F pinout, SMBJ30CA-13-F application, or SMBJ30CA-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, unidirectional vs. bi-directional configuration for AC-coupled signals, thermal derating above +25°C, and compliance with IEC 61000-4-2/4-5 surge immunity requirements.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling protection of AC signal paths and differential buses without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<5 µA at VRWM).
The device uses a single silicon die with symmetrical avalanche structure, delivering identical clamping behavior in positive and negative directions. It responds to transients within <1 ns and sustains 100 A non-repetitive forward surge current under 8.3 ms half-sine waveform conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W - Sustains 8/20 µs surge events up to this energy level without failure |
| Reverse Standoff Voltage (VRWM) | 30.0 V - Maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 33.3–38.3 V @ 1.0 mA - Confirmed avalanche initiation range for reliable triggering |
| Max Clamping Voltage (VC) | 48.4 V @ 12.4 A IPP - Upper voltage limit seen by downstream circuit during worst-case surge |
| Peak Pulse Current (IPP) | 12.4 A - Maximum transient current the device safely clamps at specified VC |
| Operating Temperature | –55°C to +150°C - Validated junction temperature range for automotive under-hood and industrial control environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with UL 94V-0 flammability rating; terminals feature matte tin plating, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (Bi-directional) | Transient conduction path | No polarity marking; symmetrical terminals conduct equally in both directions during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 (4 kV line-to-line, 2 Ω source impedance) surges |
| Glass-passivated die construction | Ensures long-term stability of breakdown voltage and leakage current over temperature and life cycle |
| Bi-directional configuration | Supports AC-coupled interfaces (e.g., RS-485, CAN, audio lines) without external polarity management |
| RoHS-compliant & halogen-free | Meets IPC-1752A material declaration requirements and EU environmental directives for industrial OEMs |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24V DC power input stage against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converter input. Use Value: Limits transient voltage to ≤48.4 V, preventing damage to 36V-rated input capacitors and controller ICs. |
Use Scenario: Surge suppression on LIN bus lines exposed to battery transients and ESD events. IC Role / Device Role / Timing Role: Bi-directional shunt protector between LIN signal and ground. Use Value: Maintains signal integrity below 48.4 V during 100 A/8.3 ms surges while adding <1 pF parasitic capacitance. |
| RS-485 Communication Ports | Smart Energy Meters |
Use Scenario: Transient protection on differential A/B lines of isolated RS-485 transceivers in utility substations. IC Role / Device Role / Timing Role: Symmetrical clamp across A-GND and B-GND, referenced to local ground plane. Use Value: Prevents latch-up in transceiver ICs during 4 kV EFT bursts while preserving common-mode noise rejection. |
Use Scenario: Input protection for 3-phase metering ICs connected to 100–240 VAC mains via step-down transformer. IC Role / Device Role / Timing Role: Secondary-side TVS on rectified DC rail feeding metrology ASIC. Use Value: Absorbs coupling transients from primary-side surges, maintaining <1% error in active energy measurement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A-13-F | Unidirectional; 30V VRWM, same clamping (48.4 V), but conducts only in reverse direction | Requires correct polarity placement; unsuitable for AC or bidirectional signal lines | Select when protecting DC rails with known polarity and space-constrained layouts |
| SMAJ30CA | Same electrical specs but SMA package (smaller footprint, lower power: 400W peak) | Lower surge handling capacity; not suitable for IEC 61000-4-5 Level 4 | Choose only for cost-sensitive, low-energy applications where PCB area is critical |
Compared with SMBJ30A-13-F, SMBJ30CA-13-F enables polarity-agnostic layout and AC signal protection; versus SMAJ30CA, it delivers 50% higher surge energy absorption in the same functional voltage class, supporting stricter industrial immunity standards.
Availability
SMBJ30CA-13-F is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, RS-485 communication ports, and smart energy meters requiring stable component supply and full compliance with IEC 61000-4-2/4-5.
Supply support for SMBJ30CA-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 North America.
This device belongs to Diodes' SMBJ series of high-power surface-mount TVS diodes, engineered specifically for industrial-grade surge immunity in harsh electromagnetic environments where reliability and repeatable clamping performance are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ30CA-13-F at its rated peak pulse current?
The maximum clamping voltage (VC) is 48.4 V at a peak pulse current (IPP) of 12.4 A, measured using the 10/1000 µs double-exponential waveform per IEC 61000-4-5. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and is guaranteed across the full operating temperature range.
How does SMBJ30CA-13-F differ from unidirectional SMBJ30A-13-F in layout and system integration?
SMBJ30CA-13-F has no cathode band marking and functions identically in both voltage polarities, eliminating orientation constraints during placement and enabling use on AC-coupled or differential signal lines. In contrast, SMBJ30A-13-F requires strict anode/cathode alignment and will not clamp positive transients, making it unsuitable for bidirectional interfaces like RS-485 or LIN without additional components.
Can SMBJ30CA-13-F be used to protect a 24V automotive CAN bus line?
Yes - its 30V VRWM provides adequate margin above 24V nominal bus voltage, and its bi-directional operation handles both dominant (0V) and recessive (5V) state transients. With 48.4V clamping, it prevents CAN transceiver damage during ISO 7637-2 Pulse 1/2/5a events, provided series impedance limits peak current to ≤12.4 A at the device location.
What is the thermal derating behavior of SMBJ30CA-13-F above +25°C ambient?
Its peak pulse power derates linearly at 4.8 W/°C above +25°C ambient, meaning at +75°C ambient, maximum usable peak pulse power drops to 360 W. This derating applies to single-pulse events; for repetitive surges, average power must remain below 5.0 W at lead temperature TL = +75°C, per steady-state dissipation rating.
SMBJ30CA-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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- 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
SMBJ30CA-13-F FAQ
1.How can I place an order for SMBJ30CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30CA-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 SMBJ30CA-13-F reliable?
The price and inventory of SMBJ30CA-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 SMBJ30CA-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ30CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30CA-13-F?
SMBJ30CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30CA-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 SMBJ30CA-13-F?
For technical support, including SMBJ30CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30CA-13-F requirements.
6.How does Aetrix verify that SMBJ30CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ30CA-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 SMBJ30CA-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ30CA-13-F?
All SMBJ30CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30CA-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 SMBJ30CA-13-F part is unused and in its original packaging.
Return procedure for SMBJ30CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30CA-13-F Tags
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