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Diodes Incorporated SMBJ30A-13-F
- Part No.:
- SMBJ30A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30A-13-F.pdf
- Description:
- TVS DIODE 30VWM 48.4VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:183,477
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Product details
Overview
SMBJ30A-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with 30V reverse standoff voltage, 33.3V minimum breakdown voltage at 1mA, 48.4V maximum clamping voltage at 12.4A peak pulse current, and SMB package. It protects DC power rails and signal lines in industrial power supplies, automotive body electronics, and telecom interface circuits against ESD and lightning-induced surges.
For engineers reviewing the SMBJ30A-13-F datasheet, SMBJ30A-13-F pinout, SMBJ30A-13-F application, or SMBJ30A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current capability under IEC 61000-4-5 waveform, thermal derating above +25°C, and unidirectional polarity alignment with DC-biased lines.
Technical Context
This TVS operates as a voltage-clamped shunt protector: when transient voltage exceeds VRWM (30V), it avalanches at VBR ≥33.3V and clamps to ≤48.4V at IPP = 12.4A using a glass-passivated silicon junction. Its 600W peak pulse power rating applies to non-repetitive 10/1000μs waveform per REA standard.
Thermal performance is defined by 4.8W/°C derating above +25°C ambient and 5.0W steady-state dissipation at TL = +75°C. Operating junction temperature spans –55°C to +150°C, supporting under-hood automotive and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - Sustains single 10/1000μs surge without failure; defines maximum energy absorption capacity. |
| Reverse Standoff Voltage | 30V - Maximum continuous DC or RMS voltage applied without significant leakage; sets operating voltage ceiling. |
| Breakdown Voltage | 33.3–38.3V @ 1mA - Voltage at which avalanche conduction begins; ensures reliable triggering before protected circuit damage. |
| Clamping Voltage | 48.4V @ 12.4A - Maximum voltage seen by downstream circuit during rated surge; determines protection margin for 3.3V/5V/24V systems. |
| Peak Pulse Current | 12.4A - Peak current handled at VC; correlates directly to IEC 61000-4-5 Level 3 (1kV/2Ω) surge compliance. |
| Junction Temperature Range | –55°C to +150°C - Validated operational range for harsh-environment deployment including engine control units and outdoor base stations. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with UL 94V-0 flammability rating, 0.1g mass, matte tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode Band (Marked End) | Anode Reference / Polarity Indicator | Identifies cathode terminal; must connect to higher-potential side of protected line in unidirectional configuration. |
| Anode (Unmarked End) | Current Sink Path | Provides low-impedance path to ground during overvoltage event; requires low-inductance PCB trace routing. |
Key Features
| Feature | Design Value |
|---|---|
| 600W Peak Pulse Power | Enables robust protection against IEC 61000-4-5 1kV/2Ω surges without derating in compact SMB footprint. |
| Glass Passivated Die | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| Lead-Free & Halogen-Free | Meets RoHS 2 and JEDEC J-STD-020 Level 1 moisture sensitivity requirements for lead-free reflow assembly. |
| Low Clamping Ratio (VC/VBR) | 1.45 typical - Minimizes overvoltage stress on downstream ICs while maintaining fast response time (<1ps). |
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 transients. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between VIN and GND, triggered within nanoseconds of overvoltage onset. Use Value: Limits rail voltage to ≤48.4V during 12.4A surge, preventing damage to buck converter controller and gate drivers. |
Use Scenario: LIN bus transceiver power line in door module subjected to ISO 7637-2 Pulse 1 and Pulse 2a transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VBAT supply pin, coordinated with local ceramic decoupling. Use Value: Maintains transceiver operation below its absolute maximum rating (40V) during 100V/50ms load dump events. |
| Telecom Interface Surge Protection | DC Motor Drive Feedback Line |
Use Scenario: RS-485 transceiver VCC supply in outdoor network switch exposed to induced lightning surges. IC Role / Device Role / Timing Role: Secondary-level protection after gas discharge tube (GDT), clamping residual energy before regulator input. Use Value: Reduces clamped voltage from >100V (GDT alone) to 48.4V, enabling use of lower-voltage-rated LDOs. |
Use Scenario: Hall-effect sensor supply line in BLDC motor controller experiencing commutation-induced voltage spikes. IC Role / Device Role / Timing Role: Localized clamp adjacent to sensor IC, minimizing trace inductance to preserve response speed. Use Value: Prevents sensor latch-up by limiting transient excursion to 48.4V, well below 50V absolute max rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA-13-F | Bi-directional version with symmetric ±30V standoff; same VC (48.4V) and PPK (600W). | Required for AC-coupled or bidirectional signal lines (e.g., USB D+/D–, CAN H/L); unsuitable for DC-biased rails. | Select only when protecting balanced differential pairs or AC signals where polarity reversal occurs. |
| SMCJ30A-13-F | Same electrical specs but larger SMC (DO-214AB) package; 1500W peak power rating; 0.25g mass. | Used where higher surge endurance is needed (e.g., front-end AC/DC inputs); requires larger PCB area and thermal relief. | Choose when system-level testing shows 600W insufficient for worst-case IEC 61000-4-5 combination wave events. |
Compared with SMBJ30CA-13-F, the unidirectional SMBJ30A-13-F offers tighter leakage control and avoids unnecessary capacitance on DC rails; versus SMCJ30A-13-F, it trades surge margin for space-constrained board layouts in secondary-side protection zones.
Availability
SMBJ30A-13-F is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and telecom interface circuits requiring stable component supply across extended production lifecycles.
Supply support for SMBJ30A-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and protection applications.
SMBJ series TVS diodes are engineered for high-reliability transient suppression in automotive, industrial, and communications infrastructure, emphasizing low clamping ratio, stable parametric drift, and AEC-Q101 qualification readiness.
FAQ
What is the maximum allowable PCB trace length between SMBJ30A-13-F and the protected IC?
Trace inductance directly impacts clamping effectiveness. For optimal performance, keep total anode-to-ground and cathode-to-rail traces under 5mm each. Longer paths increase VPEAK = L·di/dt, potentially exceeding downstream IC ratings even with low VC. Use wide, short copper pours and place the device adjacent to the connector or IC pin.
Does SMBJ30A-13-F require derating in reflow soldering profiles?
No derating is required during reflow: the device is qualified for lead-free soldering per JEDEC J-STD-020 Level 1 (MSL 1), with peak temperature tolerance up to 260°C for 30 seconds. Its glass passivation and matte tin plating ensure intermetallic stability and wetting performance without parametric shift.
How does SMBJ30A-13-F perform under repeated surge stress?
It is rated for non-repetitive pulses only: maximum 4 pulses per minute at 25°C ambient. Repeated surges cause cumulative junction heating; thermal derating to 4.8W/°C above 25°C must be applied. For repetitive threat environments, consider active crowbar circuits or hybrid TVS-thyristor solutions.
Can SMBJ30A-13-F be used in parallel for higher current handling?
Parallel connection is not recommended due to VBR mismatch (±5% tolerance), causing current imbalance and premature failure of the lower-VBR unit. For >12.4A peak current, select a single higher-rated device like SMCJ30A-13-F or verify matched-bin pairing with <0.1V VBR spread under actual test conditions.
SMBJ30A-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):
- 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
SMBJ30A-13-F FAQ
1.How can I place an order for SMBJ30A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30A-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 SMBJ30A-13-F reliable?
The price and inventory of SMBJ30A-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 SMBJ30A-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ30A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30A-13-F?
SMBJ30A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30A-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 SMBJ30A-13-F?
For technical support, including SMBJ30A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30A-13-F requirements.
6.How does Aetrix verify that SMBJ30A-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ30A-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 SMBJ30A-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ30A-13-F?
All SMBJ30A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30A-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 SMBJ30A-13-F part is unused and in its original packaging.
Return procedure for SMBJ30A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30A-13-F Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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