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Diodes Incorporated SMBJ40A-13-F
- Part No.:
- SMBJ40A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ40A-13-F.pdf
- Description:
- TVS DIODE 40VWM 64.5VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:183,566
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Product details
Overview
SMBJ40A-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with 40V reverse standoff voltage, 44.4V minimum breakdown voltage at 1mA, 64.5V maximum clamping voltage at 9.3A peak pulse current, and SMB package. It protects DC power rails and signal lines in industrial motor drives against ESD and lightning-induced surges.
For engineers reviewing the SMBJ40A-13-F datasheet, SMBJ40A-13-F pinout, SMBJ40A-13-F application, or SMBJ40A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current capability under 8.3ms waveform, thermal derating above +25°C, and RoHS-compliant matte tin lead finish for lead-free reflow compatibility.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: it remains high-impedance below 40V VRWM, then avalanches sharply at ≥44.4V VBR to divert surge current away from downstream circuitry. Its glass-passivated die ensures stable leakage (<5μA at VRWM) and repeatable breakdown behavior across temperature.
The device uses a single-junction silicon avalanche structure optimized for fast response (<1ns typical), low dynamic impedance, and robust 600W non-repetitive pulse handling per JEDEC-standard 10/1000μs waveform. Thermal performance is defined by 4.8W/°C derating above +25°C ambient and 5.0W steady-state dissipation at TL = +75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 10/1000μs transients without failure, critical for IEC 61000-4-5 Level 4 compliance |
| Reverse Standoff Voltage | 40V - maximum continuous DC or RMS voltage before significant leakage; sets upper limit for protected line voltage |
| Breakdown Voltage | 44.4V min @ 1mA - guaranteed avalanche onset threshold; defines minimum overvoltage triggering point |
| Clamping Voltage | 64.5V max @ 9.3A - maximum voltage seen by protected circuit during full-rated surge; determines required IC overvoltage margin |
| Peak Pulse Current | 9.3A @ 10/1000μs - surge current handling capacity; correlates directly with energy absorption (≈½ × VC × IPP × t) |
| Leakage Current | 5.0μA max @ 40V - ensures minimal standby power loss and no interference with high-impedance sensing nodes |
| Operating Temperature | –55°C to +150°C - supports deployment in automotive engine bays, industrial PLCs, and outdoor power electronics |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with UL 94V-0 flammability rating, 0.1g weight, and matte tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-to-cathode polarity reference | Identifies cathode terminal for unidirectional operation; must connect to higher-potential side of protected line |
| Anode | Return path to ground or lower-potential rail | Completes clamping path during surge; layout must minimize inductance to preserve clamping speed |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse power | Enables protection against severe transients including IEC 61000-4-5 4kV open-circuit tests without degradation |
| Glass-passivated die construction | Ensures long-term parameter stability and resistance to humidity-induced parametric shift in harsh environments |
| Lead-free, RoHS-compliant finish | Supports Pb-free reflow profiles (peak ≤260°C) and eliminates regulatory barriers for global industrial shipments |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on protected ICs-critical for 3.3V/5V logic interfacing with 40V supply rails |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to SMT assembly, reducing manufacturing cost and process complexity |
Applications
| Industrial Motor Drives | DC Power Supply Inputs |
|---|---|
Use Scenario: Protection of gate drivers and current-sense amplifiers against inductive kickback from IGBTs/MOSFETs during switching. IC Role / Device Role / Timing Role: Shunt clamping element placed across DC bus or control signal lines to clamp voltage spikes within safe operating area of protected ICs. Use Value: Limits transient voltage to ≤64.5V, preventing latch-up or oxide breakdown in 40V-tolerant analog front-ends and isolated gate drivers. |
Use Scenario: Surge suppression on 48V telecom or industrial power inputs exposed to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC-DC converters and PMICs to prevent input-stage damage. Use Value: Absorbs up to 600W for 10/1000μs pulses while maintaining <5μA leakage at nominal 40V rail, preserving efficiency. |
| Automotive Body Control Modules | Industrial PLC Digital I/O |
Use Scenario: ESD and load-dump protection on LIN bus transceivers and microcontroller GPIOs in under-hood modules. IC Role / Device Role / Timing Role: Fast-response shunt protector tied between LIN line and chassis ground to clamp ±30kV HBM ESD events. Use Value: Sub-1ns response time and 64.5V clamping ensure transceiver survival during ISO 10605 testing without signal distortion. |
Use Scenario: Input protection for 24V digital input cards receiving signals from field sensors and switches. IC Role / Device Role / Timing Role: Standoff device blocking normal 24V operation while clamping induced surges from relay coil flyback or cable coupling. Use Value: 40V VRWM provides 6V margin above 24V nominal, while 9.3A IPP handles repetitive 100A/10ms transients common in factory automation. |
Availability
SMBJ40A-13-F is available at Aetrix Electronics and suitable for industrial motor drives, DC power supply inputs, and automotive body control modules requiring stable component supply with full traceability and lifecycle management.
Supply support for SMBJ40A-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 and automotive markets.
The SMBJ series is designed specifically for robust transient suppression in harsh-environment applications, emphasizing stable clamping performance, low leakage, and AEC-Q200 readiness across voltage grades.
FAQ
What is the difference between SMBJ40A-13-F and SMBJ40CA-13-F?
SMBJ40A-13-F is unidirectional with cathode band marking and conducts only in reverse avalanche mode; SMBJ40CA-13-F is bidirectional, symmetrical, and clamps both positive and negative transients without polarity dependence. The "C" suffix explicitly denotes bidirectional configuration per Diodes Inc. datasheet DS19002 Rev. 20-2.
Can SMBJ40A-13-F be used in place of P6SMB40A?
Yes-both are 40V unidirectional 600W SMB-packaged TVS diodes with identical electrical specs (VRWM = 40V, VBR min = 44.4V, VC max = 64.5V, IPP = 9.3A) and mechanical dimensions. P6SMB40A is a legacy part number from other manufacturers; SMBJ40A-13-F meets or exceeds its performance with enhanced RoHS and green compliance.
What is the thermal resistance junction-to-lead (RθJL) for SMBJ40A-13-F?
RθJL is not specified in DS19002, but steady-state power dissipation is rated at 5.0W at TL = +75°C. Derating follows 4.8W/°C above +25°C ambient, implying effective RθJL ≈ 20.8°C/W when referenced to lead temperature-consistent with SMB package thermal characteristics observed in similar Diodes Inc. TVS devices.
Is SMBJ40A-13-F suitable for protecting USB or Ethernet data lines?
No-it is not optimized for high-speed data lines due to typical junction capacitance >100pF (per Fig. 2 in DS19002), which would severely attenuate signal integrity. It is intended for power rail and low-frequency signal protection only; dedicated low-capacitance TVS arrays like D24M5-01SO or SP1003 should be used for USB/Ethernet.
SMBJ40A-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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- 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
SMBJ40A-13-F FAQ
1.How can I place an order for SMBJ40A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ40A-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 SMBJ40A-13-F reliable?
The price and inventory of SMBJ40A-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 SMBJ40A-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ40A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ40A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ40A-13-F?
SMBJ40A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ40A-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 SMBJ40A-13-F?
For technical support, including SMBJ40A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ40A-13-F requirements.
6.How does Aetrix verify that SMBJ40A-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ40A-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 SMBJ40A-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ40A-13-F?
All SMBJ40A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ40A-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 SMBJ40A-13-F part is unused and in its original packaging.
Return procedure for SMBJ40A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ40A-13-F Tags
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