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Diodes Incorporated SMBJ75A-13-F
- Part No.:
- SMBJ75A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75A-13-F.pdf
- Description:
- TVS DIODE 75VWM 121VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:29,102
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Product details
Overview
SMBJ75A-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with 75V reverse standoff voltage, 83.3V minimum breakdown voltage at 1mA test current, and 121V maximum clamping voltage at 4.9A peak pulse current. It provides robust ESD and surge protection for DC power rails and signal lines in industrial power supplies, automotive body electronics, and telecom interface circuits.
For engineers reviewing the SMBJ75A-13-F datasheet, SMBJ75A-13-F pinout, SMBJ75A-13-F application, or SMBJ75A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VMAX, peak pulse current capability under 8.3ms half-sine waveform, thermal derating above +25°C, and compatibility with SMB package reflow profiles.
Technical Context
This TVS operates as a voltage-clamped shunt protector: when transient voltage exceeds VRWM = 75V, it avalanches at VBR ≥ 83.3V and limits downstream voltage to ≤121V at IPP = 4.9A. Its glass-passivated die ensures stable breakdown characteristics and low leakage (<5μA at VRWM).
The device is rated for non-repetitive 8.3ms half-sine surges per JEDEC standards, with thermal derating of 4.8W/°C above +25°C ambient and steady-state power dissipation of 5.0W at TL = +75°C. It is not intended for continuous forward conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 8.3ms transients without failure |
| Reverse Standoff Voltage | 75V - maximum continuous DC operating voltage before clamping initiates |
| Breakdown Voltage | 83.3–95.8V @ 1mA - defines precise avalanche onset threshold |
| Clamping Voltage | 121V @ 4.9A - maximum voltage seen by protected circuit during specified surge |
| Peak Pulse Current | 4.9A - peak surge current handled at rated clamping voltage |
| Leakage Current | <5μA @ 75V - negligible standby power loss and minimal loading on source |
| Operating Temp Range | −55°C to +150°C - supports under-hood automotive and industrial environments |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with UL 94V-0 flammability rating, 0.1g mass, matte tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during reverse-biased clamping | Connected to protected line; conducts surge current to cathode during overvoltage |
| Cathode | Current exit point during clamping; marked with band | Connected to ground or lower-potential rail; establishes unidirectional polarity |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse power | Enables protection against IEC 61000-4-5 Level 4 (4kV/2Ω) surges in compact SMB footprint |
| Glass-passivated die | Ensures stable VBR tolerance and long-term reliability under thermal cycling |
| Lead-free & RoHS-compliant | Meets global environmental regulations without compromising solderability or thermal performance |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream ICs while maintaining margin above VRWM |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24V DC input rail in programmable logic controller (PLC) power stage exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VIN and GND to clamp transients before they reach DC-DC converter ICs. Use Value: Limits voltage to ≤121V during 4.9A surges, protecting 36V-rated input stages of buck controllers and preventing latch-up in microcontrollers. |
Use Scenario: LIN bus transceiver power supply line in door module subjected to battery disconnect spikes and ESD events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VCC rail feeding LIN PHY IC, positioned upstream of local LDO. Use Value: Clamps 75V-rated rail to 121V within 1ns response time, preserving LIN signal integrity and avoiding transceiver reset during 100V/10ms load dump. |
| Telecom Ethernet Interface | Smart Meter Communication Port |
Use Scenario: 48V PoE-powered Ethernet PHY interface vulnerable to lightning-induced surges on data pairs and power lines. IC Role / Device Role / Timing Role: Secondary clamping device on midspan PSE output rail, coordinated with primary gas discharge tube. Use Value: Provides fast-response secondary clamping (121V VC) after GDT crowbars, limiting residual energy delivered to PHY's 57V absolute max rating. |
Use Scenario: RS-485 communication port in utility meter exposed to induced surges from nearby lightning strikes on distribution lines. IC Role / Device Role / Timing Role: Rail-to-rail TVS on VDD supply of isolated RS-485 transceiver, placed adjacent to connector. Use Value: Maintains 75V standoff while clamping to 121V, ensuring transceiver remains within its 130V isolation barrier rating during 1kV/500A surge tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA-13-F | Bi-directional version; symmetric clamping for AC-coupled or bidirectional signal lines | Required where both positive and negative transients must be suppressed (e.g., USB D+/D−, CAN H/L) | Select only if bidirectional protection is needed; otherwise unidirectional SMBJ75A offers tighter VRWM/VC margin |
| SMCJ75A-13-F | Same electrical specs but in larger SMC (DO-214AB) package; 1500W peak power rating | Used where higher surge energy handling (e.g., IEC 61000-4-5 Level 5) or improved thermal mass is required | Choose when PCB layout allows larger footprint and system-level testing demands >600W surge capacity |
Compared with SMBJ75CA-13-F, the SMBJ75A-13-F provides superior unidirectional clamping margin for DC rails, while SMCJ75A-13-F trades SMB footprint for higher surge robustness-making SMBJ75A optimal for space-constrained 75V DC protection where 600W suffices.
Availability
SMBJ75A-13-F is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, and telecom Ethernet interface designs requiring stable component supply, consistent parametric performance across production lots, and full traceability to Diodes Incorporated wafer fabrication.
Supply support for SMBJ75A-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, automotive, and communications markets.
The SMBJ series is part of Diodes' transient voltage suppressor portfolio, engineered specifically for surface-mount surge immunity in space-constrained DC power and interface applications demanding repeatable clamping performance and AEC-Q200 readiness.
FAQ
What is the maximum clamping voltage of SMBJ75A-13-F at its rated peak pulse current?
The maximum clamping voltage (VC) is 121V at IPP = 4.9A, measured using the standard 8.3ms half-sine waveform per IEC 61000-4-5. This value is guaranteed across temperature and process variation, and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMBJ75A-13-F suitable for automotive applications?
Yes-SMBJ75A-13-F meets AEC-Q200 stress test requirements for transient suppression devices and is widely used in automotive body electronics, including BCMs, lighting modules, and infotainment power rails. Its −55°C to +150°C operating range and robust glass-passivated die support under-hood deployment.
How does SMBJ75A-13-F differ from SMBJ75CA-13-F?
SMBJ75A-13-F is unidirectional with cathode-band marking and clamps only positive transients relative to ground; SMBJ75CA-13-F is bidirectional, symmetrical, and suppresses both polarities. The "C" suffix denotes bidirectional construction, resulting in identical VRWM and VC for ±75V standoff.
What is the thermal derating behavior above +25°C ambient?
Peak pulse power derates linearly at 4.8W/°C above +25°C ambient, meaning at +75°C ambient, the usable peak pulse power drops to 360W (600W − 4.8W/°C × 50°C). This reflects junction temperature rise limitations and must be factored into system-level surge margin calculations.
SMBJ75A-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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 4.9A
- 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
SMBJ75A-13-F FAQ
1.How can I place an order for SMBJ75A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75A-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 SMBJ75A-13-F reliable?
The price and inventory of SMBJ75A-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 SMBJ75A-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ75A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75A-13-F?
SMBJ75A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75A-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 SMBJ75A-13-F?
For technical support, including SMBJ75A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75A-13-F requirements.
6.How does Aetrix verify that SMBJ75A-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ75A-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 SMBJ75A-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ75A-13-F?
All SMBJ75A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75A-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 SMBJ75A-13-F part is unused and in its original packaging.
Return procedure for SMBJ75A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75A-13-F Tags
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