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Diodes Incorporated SMBJ7.5CA-13-F
- Part No.:
- SMBJ7.5CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CA-13-F.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:59,049
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Product details
Overview
SMBJ7.5CA-13-F from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in SMB package, designed for overvoltage protection of sensitive electronics. It features 7.5 V reverse standoff voltage (VRWM), 8.33–9.58 V breakdown voltage (VBR) at 1.0 mA test current, 12.9 V max clamping voltage (VC) at 46.5 A peak pulse current, and 600 W peak pulse power dissipation. It is used in DC power input lines of industrial controllers to absorb ESD and lightning-induced surges.
For engineers reviewing the SMBJ7.5CA-13-F datasheet, SMBJ7.5CA-13-F pinout, SMBJ7.5CA-13-F application, or SMBJ7.5CA-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, unidirectional vs. bi-directional polarity requirements for AC-coupled or floating signal paths, and thermal derating above +25°C ambient.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling protection of AC signals, differential buses, or floating supply rails without polarity constraints. Its glass-passivated junction ensures stable leakage and robust surge handling under repeated transients.
The device complies with IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) standards when applied with appropriate PCB layout and series impedance. Clamping begins near VRWM and fully engages within nanoseconds, limiting voltage overshoot during 8.3 ms half-sine surges up to 46.5 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W - sustains single 8.3 ms surge events without failure under defined test conditions |
| Reverse Standoff Voltage | 7.5 V - maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage | 8.33–9.58 V @ 1.0 mA - guaranteed conduction onset range, critical for timing margin against protected circuit's absolute maximum rating |
| Clamping Voltage | 12.9 V @ 46.5 A - maximum voltage seen by downstream circuit during specified surge, defining protection window |
| Leakage Current | 100 µA @ 7.5 V - low standby loss essential for battery-powered or high-impedance sensing nodes |
| Package | SMB - surface-mount outline with 5.00–5.59 mm body length, compatible with standard reflow profiles and IPC-7351B footprints |
Pinout & Package
Two-terminal SMB package: Cathode band omitted (bi-directional); terminals are non-polarized and interchangeable. Case material is UL 94V-0 molded plastic; weight ≈ 0.1 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Bi-directional conduction allows identical surge suppression for positive or negative polarity transients; no orientation required during placement |
| Case | Thermal mass / mechanical anchor | Molded plastic body provides mechanical stability and contributes to thermal dissipation via PCB copper area; no electrical connection |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 24 V industrial lines without derating |
| Glass-passivated die | Ensures stable VBR and low IR over temperature and lifetime, critical for long-term reliability in unattended equipment |
| Bi-directional configuration | Eliminates polarity-checking during assembly and supports AC-coupled interfaces like RS-485 or CAN bus stubs |
| RoHS-compliant & halogen-free | Meets IPC-1752A material declaration requirements for automotive and medical OEMs requiring full substance traceability |
Applications
| Industrial PLC I/O Protection | RS-485 Transceiver Protection |
|---|---|
Use Scenario: 24 V DC input channels on programmable logic controller backplanes exposed to field-wiring induced surges. IC Role / Device Role: Primary overvoltage clamp placed between terminal block and input conditioning circuitry. Use Value: Limits transient voltage to ≤12.9 V, preserving integrity of 16-bit ADC front-end and optocoupler isolation barrier. | Use Scenario: Half-duplex RS-485 data lines connecting factory-floor sensors to gateway nodes in noisy motor-control environments. IC Role / Device Role: Bi-directional TVS shunting common-mode surges on A/B differential pair before transceiver ESD structure. Use Value: Prevents latch-up in SN65HVD72 transceivers during 4 kV contact ESD events per IEC 61000-4-2. |
| Smart Meter Power Input | Automotive Body Control Module |
Use Scenario: Mains-derived 12 V auxiliary supply input in ANSI C12.20-certified electricity meters subject to utility grid switching transients. IC Role / Device Role: First-line surge suppression ahead of buck converter and real-time clock backup circuitry. Use Value: Maintains <100 µA leakage at 7.5 V, avoiding battery drain in >10-year meter deployments. | Use Scenario: LIN bus physical layer interface in door module ECUs exposed to load dump and jump-start transients. IC Role / Device Role: Secondary protection element parallel to primary TVS, sharing surge energy to extend system-level immunity. Use Value: Withstands 100 A 8.3 ms surge per ISO 7637-2 Pulse 5a when combined with upstream 1206-mounted TVS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5A-13-F | Uni-directional; cathode-marked; 100 µA IR @ VRWM vs. 100 µA for bi-directional variant | Requires correct polarity alignment; unsuitable for AC or floating nodes | Select only when protecting unidirectional DC rails with known polarity and space-constrained layouts |
| SMAJ7.5CA | Same electrical specs but SMA package; 400 W PPK rating; 0.05 g weight | Lower surge capacity; reduced thermal mass limits repetitive surge duty cycle | Choose for cost-sensitive consumer designs where 400 W suffices and board space is tighter than SMB footprint |
Compared with SMBJ7.5A-13-F, the bi-directional version eliminates polarity risk in differential or AC-coupled circuits; compared with SMAJ7.5CA, it delivers 50% higher surge energy handling and superior thermal stability in industrial ambient conditions.
Availability
SMBJ7.5CA-13-F is available at Aetrix Electronics and suitable for industrial automation, building management systems, and smart energy metering requiring stable component supply and long-lifecycle support.
Supply support for SMBJ7.5CA-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 US.
The SMBJ series targets high-reliability transient suppression in harsh environments, emphasizing stable clamping performance, low leakage, and compliance with industrial surge immunity standards.
FAQ
What is the difference between SMBJ7.5CA-13-F and SMBJ7.5A-13-F?
SMBJ7.5CA-13-F is bi-directional (no polarity marking), while SMBJ7.5A-13-F is uni-directional with a cathode band. The 'C' suffix indicates symmetrical clamping for AC or floating circuits; the uni-directional version requires correct anode/cathode orientation and only protects against reverse-polarity transients.
Can SMBJ7.5CA-13-F be used on a 5 V USB port?
No - its 7.5 V VRWM exceeds typical 5.5 V absolute maximum ratings of USB PHY ICs. Clamping begins at ≥8.33 V, risking damage during ESD events. For USB 2.0, use a 5.0 V rated TVS like SMBJ5.0CA-13-F with lower VC and tighter VBR tolerance.
What is the maximum operating temperature for continuous operation?
The device supports continuous operation from –55°C to +150°C junction temperature. At ambient temperatures above +25°C, derate peak pulse power by 4.8 W/°C and steady-state power using Fig. 6 in DS19002; maximum lead temperature is +75°C for 5.0 W average dissipation.
Does SMBJ7.5CA-13-F meet automotive AEC-Q200 requirements?
No - it is qualified for commercial temperature range (–55°C to +150°C) but not AEC-Q200 stress-tested. For automotive applications, consider Diodes' AEC-Q200-qualified P4SMAJ7.5CA or SMAJ7.5CA-Q, which undergo extended temperature cycling and humidity testing.
SMBJ7.5CA-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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 46.5A
- 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
SMBJ7.5CA-13-F FAQ
1.How can I place an order for SMBJ7.5CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CA-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 SMBJ7.5CA-13-F reliable?
The price and inventory of SMBJ7.5CA-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 SMBJ7.5CA-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CA-13-F?
SMBJ7.5CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CA-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 SMBJ7.5CA-13-F?
For technical support, including SMBJ7.5CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CA-13-F requirements.
6.How does Aetrix verify that SMBJ7.5CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CA-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 SMBJ7.5CA-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CA-13-F?
All SMBJ7.5CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CA-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 SMBJ7.5CA-13-F part is unused and in its original packaging.
Return procedure for SMBJ7.5CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CA-13-F Tags
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ESD9B5.0ST5G
onsemi
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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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Diodes Incorporated
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Diodes Incorporated
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