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Vishay General Semiconductor - Diodes Division SMBJ45CD-M3/H
- Part No.:
- SMBJ45CD-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ45CD-M3/H.pdf
- Description:
- TVS DIODE 45VWM 71.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,489
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Product details
Overview
SMBJ45CD-M3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 45 V stand-off voltage (VWM), 50.8–54.5 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), and clamps to ≤71.6 V at 8.4 A peak surge current - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ45CD-M3/H datasheet, SMBJ45CD-M3/H pinout, SMBJ45CD-M3/H application, or SMBJ45CD-M3/H equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, thermal derating curves, MSL Level 1 reflow compatibility, and RoHS/halogen-free compliance per JESD201 Class 2 whisker testing - all critical for ESD/surge design validation in automotive-grade and industrial control systems.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (50.8–54.5 V), VWM (45 V), and VC (≤71.6 V at IPPM) in either direction. Its low incremental surge resistance and fast response time enable effective suppression of lightning-induced surges and inductive switching transients without polarity sensitivity.
Thermal performance is defined by RθJA = 125 °C/W (on minimum pad) and RθJM = 20 °C/W, supporting operation up to TJ = 150 °C. Power dissipation is rated at 1.0 W at TA = 25 °C and derates linearly above that temperature, with 5.0 W capability when mounted on an infinite heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - maximum continuous reverse operating voltage before significant leakage; defines safe working range for protected circuitry. |
| VBR (min/max) | 50.8 V / 54.5 V at IT = 1 mA - tight ±3.5 % tolerance ensures predictable clamping onset across production lots. |
| VC @ IPPM | ≤71.6 V at 8.4 A - clamping voltage under 600 W 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 600 W - peak transient power handling capacity; validates suitability for IEC 61000-4-5 Level 3/4 surge immunity designs. |
| ID @ VWM | ≤0.5 μA - ultra-low reverse leakage preserves signal integrity and battery life in high-impedance sensor paths. |
| TJ max | 150 °C - maximum junction temperature; supports extended operation in enclosed industrial enclosures or under convection-limited conditions. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C peak reflow), matte tin-plated terminals compliant with J-STD-002 and JESD22-B102. Bidirectional construction has no cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals function identically; bidirectional clamping allows placement without orientation constraints on PCB. |
| Cathode Band (absent) | Polarity indicator | Not present - confirms bidirectional functionality; eliminates risk of incorrect orientation during automated assembly. |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise, repeatable clamping thresholds across temperature and lot variance - critical for compliance with IEC 61000-4-5 margin requirements. |
| 600 W peak pulse power (10/1000 μs) | Validates robustness against lightning surges and inductive kickback in 24 V industrial control buses and PoE-powered devices. |
| MSL Level 1 rating | Supports single-pass lead-free reflow at 260 °C without popcorn or delamination - eliminates pre-bake requirements in high-volume SMT lines. |
| ≤0.5 μA ID at VWM | Minimizes standby current drain in always-on sensor nodes and battery-backed communication modules. |
| Low RθJM = 20 °C/W | Enables efficient heat transfer to PCB copper pads - sustains repetitive surge duty cycles without thermal runaway. |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
Use Scenario: Protecting analog output lines (4–20 mA) and digital I/O of PLC modules from field-wiring induced surges and ground loop transients. IC Role / Device Role: Bidirectional clamping element placed directly at connector entry point before signal conditioning circuitry. Use Value: Clamps 45 V nominal lines to ≤71.6 V during 600 W surges, preserving ADC input stages and isolator ICs without adding polarity-sensitive components. |
Use Scenario: Shielding RS-485/RS-422 differential pairs in base station backhaul equipment exposed to lightning-induced common-mode transients. IC Role / Device Role: Common-mode TVS pair (one per line) referenced to chassis ground, leveraging symmetrical breakdown for balanced suppression. Use Value: Maintains signal integrity under repeated 10/1000 μs surges while meeting GR-1089-CORE telecom immunity requirements due to tight VBR tolerance and low VC. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding LIN bus transceivers and window lift motor drivers against load dump and alternator ripple in 12 V vehicle subsystems. IC Role / Device Role: Bidirectional TVS placed between LIN data line and ground, with VWM aligned to 12 V system nominal and margin for battery transients. Use Value: Withstands 150 °C junction temperature and passes AEC-Q200 stress tests when used with minimum recommended pad layout per Vishay spec. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machine pumps). IC Role / Device Role: Across-the-line TVS on motor terminals to clamp inductive kickback before it reaches MCU GPIOs or H-bridge FETs. Use Value: 600 W rating handles repetitive 100–500 ms motor switch-off events; low leakage avoids false triggering of overvoltage detection circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45CA-E3/52 (Vishay) | Same VWM/VBR/VC specs but M3/H suffix replaced with -E3/52; RoHS-compliant but not halogen-free; MSL Level 1 unchanged. | No difference in surge protection performance; differs only in material compliance and tape/reel packaging format. | Select SMBJ45CD-M3/H when halogen-free and JESD201 Class 2 whisker resistance are required for automotive or medical OEM programs. |
| 1.5SMC47CA (ON Semiconductor) | Same SMB package, 47 V VWM, 52.2–57.7 V VBR, 77 V VC @ 7.7 A; 600 W rating; slightly higher clamping voltage and looser VBR tolerance (±5 %). | Acceptable for non-critical industrial controls where tighter VBR tolerance is not mandated by end-equipment standards. | Choose SMBJ45CD-M3/H over 1.5SMC47CA when design requires ±3.5 % VBR tolerance, lower VC, or guaranteed halogen-free construction. |
Compared with SMBJ45CA-E3/52, SMBJ45CD-M3/H adds halogen-free and whisker-resistant plating; versus 1.5SMC47CA, it delivers tighter VBR control and lower clamping voltage - both advantages for high-reliability industrial and automotive surge protection where margin and consistency are design-critical.
Availability
SMBJ45CD-M3/H is available at Aetrix Electronics and suitable for industrial sensor interface, telecom line protection, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and full compliance documentation including RoHS, REACH, and conflict minerals reporting.
Supply support for SMBJ45CD-M3/H 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMBJ series targets high-energy transient suppression in space-constrained applications, combining high-power capability with tight parametric tolerances and robust thermal performance for industrial, telecom, and automotive environments.
FAQ
What does the "CD" suffix indicate in SMBJ45CD-M3/H?
The "CD" suffix in SMBJ45CD-M3/H denotes a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., SMBJ45D), SMBJ45CD-M3/H provides symmetrical clamping in both polarities - no cathode band marking, identical VBR and VC characteristics regardless of voltage polarity. This makes it ideal for AC-coupled lines, differential buses like RS-485, and applications where polarity reversal cannot be guaranteed during installation or operation.
What is the maximum clamping voltage of SMBJ45CD-M3/H under surge conditions?
The maximum clamping voltage (VC) of SMBJ45CD-M3/H is 71.6 V at its rated peak pulse current (IPPM) of 8.4 A, tested with a 10/1000 μs waveform. This value represents the upper limit of voltage seen by downstream circuitry during a full 600 W transient event. Designers must ensure that the protected IC's absolute maximum ratings exceed 71.6 V to guarantee survivability under worst-case surge conditions.
Is SMBJ45CD-M3/H compatible with lead-free reflow soldering processes?
Yes, SMBJ45CD-M3/H is qualified to MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C. Its matte tin-plated terminals meet J-STD-002 and JESD22-B102 solderability standards, and the molding compound is halogen-free and RoHS-compliant. No pre-bake is required prior to reflow, simplifying manufacturing for high-volume SMT lines.
How does SMBJ45CD-M3/H differ from unidirectional SMBJ45D-M3/H?
SMBJ45CD-M3/H is bidirectional with symmetrical VBR (50.8–54.5 V) and VC (≤71.6 V) in both directions and no cathode band, whereas SMBJ45D-M3/H is unidirectional with cathode-marked polarity and clamps only in reverse bias. The bidirectional version eliminates orientation errors during placement and suits AC or polarity-agnostic signal lines; the unidirectional variant offers slightly lower leakage in DC-biased applications but requires correct polarity alignment.
What thermal derating applies to SMBJ45CD-M3/H above 25 °C ambient?
SMBJ45CD-M3/H power dissipation derates linearly above TA = 25 °C: from 1.0 W at 25 °C to zero at approximately 125 °C (based on RθJA = 125 °C/W). For example, at TA = 75 °C, allowable steady-state power drops to 0.6 W. Derating curves are provided in Figure 5 of Vishay document 87606; for pulsed operation, junction temperature must remain ≤150 °C using thermal impedance data from Figure 6.
SMBJ45CD-M3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50.8V
- Voltage - Clamping (Max) @ Ipp:
- 71.6V
- Current - Peak Pulse (10/1000µs):
- 8.4A
- 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:
- DO-214AA (SMBJ)
SMBJ45CD-M3/H FAQ
1.How can I place an order for SMBJ45CD-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ45CD-M3/H 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 SMBJ45CD-M3/H reliable?
The price and inventory of SMBJ45CD-M3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ45CD-M3/H is usually 5 days.
3.What payment methods are accepted for SMBJ45CD-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ45CD-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ45CD-M3/H?
SMBJ45CD-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ45CD-M3/H 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 SMBJ45CD-M3/H?
For technical support, including SMBJ45CD-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ45CD-M3/H requirements.
6.How does Aetrix verify that SMBJ45CD-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ45CD-M3/H 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 SMBJ45CD-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ45CD-M3/H?
All SMBJ45CD-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ45CD-M3/H, 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 SMBJ45CD-M3/H part is unused and in its original packaging.
Return procedure for SMBJ45CD-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ45CD-M3/H Tags
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ESD9B5.0ST5G
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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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Toshiba Semiconductor and Storage
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Diodes Incorporated
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