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Vishay General Semiconductor - Diodes Division SMBJ90CAHM3_B/I
- Part No.:
- SMBJ90CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ90CAHM3_B/I.pdf
- Description:
- 600W,90V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,048
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Product details
Overview
SMBJ90CAHM3_B/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 90 V standoff voltage (VWM), 100 V minimum breakdown voltage (VBR), 146 V maximum clamping voltage (VC) at 4.1 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and telecom interface circuits.
For engineers reviewing the SMBJ90CAHM3_B/I datasheet, SMBJ90CAHM3_B/I pinout, SMBJ90CAHM3_B/I application, or SMBJ90CAHM3_B/I equivalent, key selection criteria include bidirectional clamping symmetry, low thermal resistance (RθJL = 20 °C/W), AEC-Q101 qualification status, and halogen-free RoHS compliance per Vishay HM3 suffix - critical for automotive-grade ESD/surge resilience in harsh environments.
Technical Context
This device operates as a voltage-clamped shunt protector: during transients exceeding VWM (90 V), it avalanches symmetrically in both directions to clamp voltage at ≤146 V while diverting surge current up to 4.1 A (10/1000 µs). Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), with low incremental surge resistance enabling precise energy handling without thermal runaway.
Designed for surface-mount assembly on standard PCB copper pads (0.2" × 0.2"), SMBJ90CAHM3_B/I delivers repeatable performance across -55 °C to +150 °C junction temperature range. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification - meeting automotive reliability requirements for under-hood and infotainment power rail protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC working margin for protected circuitry. |
| VBR (min) | 100 V - guaranteed minimum breakdown voltage at 1 mA test current; ensures consistent avalanche turn-on threshold. |
| VC (max) | 146 V - maximum clamped voltage at 4.1 A IPPM (10/1000 µs); determines worst-case overvoltage stress on downstream ICs. |
| PPPM | 600 W - peak pulse power dissipation capability; supports high-energy transients like ISO 7637-2 Pulse 1/2a/5a in automotive systems. |
| RθJL | 20 °C/W - junction-to-lead thermal resistance; enables effective heat transfer to PCB traces without external heatsink. |
| TJ max. | +150 °C - maximum junction temperature rating; allows operation in high-ambient environments such as engine control units. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals function as interchangeable anode/cathode pair for AC-coupled or floating signal line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Interchangeable terminal; conducts in either direction when voltage exceeds ±VBR - eliminates orientation concerns during layout and assembly. |
| Terminal 2 | Anode / Cathode (bidirectional) | Interchangeable terminal; forms symmetrical clamping path with Terminal 1 - essential for protecting differential buses or ungrounded sensors. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential pairs, or floating power domains without polarity constraints. |
| AEC-Q101 qualified | Validated for automotive applications including powertrain and body electronics - supports PPAP documentation and long-term reliability requirements. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance mandates for global OEMs and Tier 1 suppliers; eliminates brominated flame retardants in molding compound. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy surges from inductive switching (e.g., relay coils, solenoids) and lightning-induced transients in industrial controls. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage overshoot during suppression - preserves margin for 100 V-rated MOSFETs and gate drivers in motor inverters. |
Applications
| Industrial Motor Drives | Automotive Infotainment Power Rails |
|---|---|
|
Use Scenario: Protection of 90 V DC bus against switching spikes from IGBT gate drivers and regenerative braking feedback. IC Role / Device Role / Timing Role: Shunt TVS diode placed across bus input capacitor to clamp transients within 1 ns before they reach DC-DC converters and MCU power supplies. Use Value: Prevents latch-up or permanent damage to 100 V-rated buck controllers by limiting surge voltage to ≤146 V at 4.1 A peak current. |
Use Scenario: Surge suppression on 12 V supply lines feeding USB-C PD controllers and HDMI transceivers in head units. IC Role / Device Role / Timing Role: Bidirectional clamping element connected between VBUS and GND to absorb ISO 10605 ESD and load dump energy. Use Value: Maintains system uptime during 30 kV contact ESD events and meets CISPR 25 Class 5 radiated emissions limits via controlled clamping. |
| Telecom Ethernet PHY Interfaces | Smart Grid Sensor Nodes |
|
Use Scenario: Transient protection on 10/100BASE-TX transformer center taps exposed to induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Symmetric TVS pair (one per differential line) referenced to chassis ground to suppress common-mode transients without distorting signal integrity. Use Value: Preserves 100 Mbps data integrity by limiting clamping overshoot to <150 V while maintaining <0.5 pF junction capacitance at zero bias. |
Use Scenario: Overvoltage hardening of RS-485 transceivers and current-sense amplifiers in outdoor smart metering modules. IC Role / Device Role / Timing Role: Bidirectional shunt protector on VCC and signal lines to withstand 1 kV/µs fast-rising surges per IEC 61000-4-5 Level 3. Use Value: Extends field lifetime beyond 15 years by preventing cumulative degradation of analog front-end components under repeated surge exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CAHE3_B/I | Same electrical specs and SMB package, but uses standard RoHS-compliant (E3) molding compound - not halogen-free. | Lacks halogen-free certification required by some EU automotive OEMs; suitable for commercial/industrial use where HM3 is not mandated. | Select SMBJ90CAHE3_B/I only if halogen-free compliance is not contractually required and cost optimization is prioritized. |
| SMCJ90CAHM3_A/I | Same VWM (90 V) and bidirectional function, but in larger SMC (DO-214AB) package with 1500 W PPPM rating and higher IPPM (9.2 A). | Occupies more PCB area but provides higher surge margin for applications subject to repeated lightning strikes or severe load dump. | Choose SMCJ90CAHM3_A/I when system-level testing reveals insufficient margin with 600 W rating - especially in utility substation interfaces. |
Compared with SMBJ90CAHM3_B/I, SMBJ90CAHE3_B/I trades halogen-free compliance for lower cost in non-automotive settings, while SMCJ90CAHM3_A/I upgrades surge capacity at the expense of footprint - making SMBJ90CAHM3_B/I optimal for space-constrained AEC-Q101–mandated designs needing balanced performance and compliance.
Availability
SMBJ90CAHM3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive infotainment systems, and telecom Ethernet PHY interfaces requiring stable component supply with full traceability and lifecycle continuity.
Supply support for SMBJ90CAHM3_B/I 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, and protection devices with emphasis on reliability, precision, and application-specific validation.
The SMBJ series targets board-level transient suppression in automotive, industrial, and telecom systems - engineered for rapid response, repeatable clamping, and compliance with AEC-Q101, UL 497B, and IEC 61000-4-2/5 standards.
FAQ
What is the clamping voltage of SMBJ90CAHM3_B/I at its rated peak pulse current?
The SMBJ90CAHM3_B/I has a maximum clamping voltage (VC) of 146 V at 4.1 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ90CAHM3_B/I maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C), ensuring consistent protection in demanding environments.
Is SMBJ90CAHM3_B/I suitable for automotive applications?
Yes, SMBJ90CAHM3_B/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction - meeting stringent automotive reliability and environmental requirements. It is validated for use in engine control units, body electronics, and infotainment systems where sustained operation at +150 °C junction temperature and resistance to repetitive surge stress are mandatory. The SMBJ90CAHM3_B/I undergoes accelerated life testing per AEC-Q101 protocols to ensure long-term field reliability.
How does the bidirectional design of SMBJ90CAHM3_B/I affect PCB layout?
The SMBJ90CAHM3_B/I has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. This simplifies PCB layout for AC-coupled lines, differential buses (e.g., RS-485), or floating sensor interfaces where ground reference is undefined. Engineers can place the SMBJ90CAHM3_B/I without verifying anode/cathode alignment - reducing assembly errors and enabling symmetric routing that preserves signal integrity in high-speed or noise-sensitive circuits.
What is the thermal resistance from junction to lead (RθJL) for SMBJ90CAHM3_B/I?
The SMBJ90CAHM3_B/I has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, measured under standard mounting conditions. This low value enables efficient heat conduction from the silicon die directly into PCB copper traces or thermal pads, supporting reliable operation at full 600 W pulse power without external heatsinking. When designing layouts for SMBJ90CAHM3_B/I, using ≥0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal maximizes this thermal advantage and prevents localized overheating during repetitive surge events.
Does SMBJ90CAHM3_B/I meet UL recognition standards?
Yes, SMBJ90CAHM3_B/I is Underwriters Laboratories (UL) recognized under file number E136766 for both unidirectional and bidirectional configurations, complying with UL 497B for primary protectors. This certification validates its safety performance in telecommunications and industrial equipment where regulatory approval is required for market access. The UL recognition applies specifically to the SMBJ90CAHM3_B/I device configuration - confirming its suitability for use in UL-listed end products without additional system-level requalification.
SMBJ90CAHM3_B/I 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):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 4.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ90CAHM3_B/I FAQ
1.How can I place an order for SMBJ90CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ90CAHM3_B/I 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 SMBJ90CAHM3_B/I reliable?
The price and inventory of SMBJ90CAHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ90CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ90CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ90CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ90CAHM3_B/I?
SMBJ90CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ90CAHM3_B/I 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 SMBJ90CAHM3_B/I?
For technical support, including SMBJ90CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ90CAHM3_B/I requirements.
6.How does Aetrix verify that SMBJ90CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ90CAHM3_B/I 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 SMBJ90CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ90CAHM3_B/I?
All SMBJ90CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ90CAHM3_B/I, 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 SMBJ90CAHM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ90CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ90CAHM3_B/I Tags
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