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Vishay General Semiconductor - Diodes Division SMBJ90A-M3/5B
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- Part No.:
- SMBJ90A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ90A-M3/5B.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,592
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Product details
Overview
SMBJ90A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features 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 (10/1000 μs waveform). It is used to protect MOSFET gates, sensor interfaces, and industrial I/O circuits against lightning-induced surges and inductive switching transients.
For engineers reviewing the SMBJ90A-M3/5B datasheet, SMBJ90A-M3/5B pinout, SMBJ90A-M3/5B application, or SMBJ90A-M3/5B equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under standardized surge waveforms, and precise mechanical footprint data for PCB layout validation and reliability-driven circuit protection design.
Technical Context
The SMBJ90A-M3/5B operates as a unidirectional avalanche diode with cathode-banded polarity, leveraging glass-passivated junction technology for stable breakdown and low leakage (<1.0 μA at VWM). Its 100 °C/W junction-to-ambient thermal resistance (RθJA) requires careful pad layout per Vishay's recommended 0.2" × 0.2" copper pads for rated 600 W pulse handling.
It responds to transients in <1 ps and maintains clamping within ±5% over its operating temperature range (–55 °C to +150 °C). The device is halogen-free, RoHS-compliant, and qualified to JESD201 Class 2 whisker resistance - but not AEC-Q101 (that requires HE3/HM3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 90 V - Maximum continuous reverse voltage before significant leakage; sets upper limit for normal operation without conduction. |
| VBR (Breakdown Voltage) | 100–111 V at 1 mA - Guaranteed avalanche initiation range; ensures reliable triggering above system operating voltage. |
| VC (Clamping Voltage) | 146 V at 4.1 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; defines protection margin. |
| IPPM (Peak Pulse Current) | 4.1 A - Maximum non-repetitive surge current the device safely clamps; derived from 600 W rating and VC. |
| PPPM (Peak Pulse Power) | 600 W - Surge energy-handling capability under standard 10/1000 μs waveform; enables robust protection in industrial environments. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in high-ambient industrial enclosures with limited airflow. |
| Package | SMB (DO-214AA) - 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), molded plastic case with matte tin-plated leads. Cathode identified by a band on the body; anode is unmarked end. Meets UL 94 V-0 flammability rating and J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VWM exceeded; must be routed with low-inductance path to GND plane. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return; forms clamping loop with cathode; polarity-critical for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on 24 V industrial buses. |
| 146 V clamping at 4.1 A | Limits stress on downstream 150 V-rated MOSFETs or op-amps, preserving long-term reliability under repeated transients. |
| Low leakage (<1.0 μA at 90 V) | Prevents measurable power loss or bias shift in high-impedance sensor front-ends or battery-powered systems. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| Halogen-free & RoHS-compliant (M3 suffix) | Fulfills environmental compliance for global industrial and telecom equipment without compromising surge performance. |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module (BCM) Power Input |
|---|---|
|
Use Scenario: Protecting 24 V DC input terminals of programmable logic controllers against load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp positive-going surges up to 600 W. Use Value: Prevents damage to upstream DC-DC converters and microcontroller power rails during 12 V/24 V vehicle system transients. |
Use Scenario: Safeguarding 12 V supply inputs of BCM modules exposed to ISO 7637-2 Pulse 1 and Pulse 3a/b. IC Role / Device Role / Timing Role: Standoff-clamp TVS on main power feed, triggered only during overvoltage events >90 V. Use Value: Maintains functional safety integrity by limiting voltage excursions to ≤146 V, below critical semiconductor breakdown thresholds. |
| Telecom Remote Radio Unit (RRU) DC Feeds | Factory Automation Sensor Signal Lines |
|
Use Scenario: Protecting −48 V DC power inputs of outdoor wireless base station RRUs from lightning-induced surges on tower-mounted feeds. IC Role / Device Role / Timing Role: Reverse-polarity connected unidirectional TVS (cathode to −48 V rail) to clamp negative transients to ground. Use Value: Ensures uninterrupted operation during Category C2/C3 surge events while meeting Telcordia GR-1089 immunity requirements. |
Use Scenario: Shielding analog 4–20 mA current loop inputs of industrial pressure/temperature sensors from ESD and cable-coupled noise. IC Role / Device Role / Timing Role: Low-leakage TVS across signal and return lines to shunt sub-100 ns ESD pulses before reaching precision ADC front-end. Use Value: Preserves measurement accuracy by preventing latch-up or parametric drift in instrumentation amplifiers during field maintenance events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A-E3/5B | Same electrical specs; RoHS-compliant but contains brominated flame retardants (non-halogen-free). | Acceptable where halogen-free requirement is not mandated (e.g., non-EU commercial equipment). | Select when cost sensitivity outweighs halogen-free compliance; identical footprint and assembly process. |
| SMBJ90CA-M3/5B | Bidirectional variant; symmetric VBR = 100–111 V; same VC = 146 V but clamps both polarities. | Required for AC-coupled or floating signal lines subject to bipolar transients (e.g., RS-485, CAN bus). | Choose only if bidirectional protection is needed; not a drop-in replacement due to polarity and circuit topology implications. |
Compared with SMBJ90A-M3/5B, the E3 variant trades halogen-free status for lower cost without altering surge performance, while the 90CA variant adds bidirectional clamping at the expense of requiring revised grounding strategy and layout review - neither is pin-compatible without system-level redesign.
Availability
SMBJ90A-M3/5B is available at Aetrix Electronics and suitable for industrial PLCs, telecom power supplies, automotive body control modules, and factory automation sensor interfaces requiring stable component supply and consistent surge immunity performance across production batches.
Supply support for SMBJ90A-M3/5B 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, power efficiency, and automotive-grade qualification.
The SMBJ series was engineered for high-energy transient suppression in harsh industrial and transportation environments, delivering repeatable clamping performance under repetitive surge stress and wide temperature extremes.
FAQ
What is the clamping voltage of SMBJ90A-M3/5B at its rated peak pulse current?
The SMBJ90A-M3/5B has a maximum clamping voltage (VC) of 146 V when subjected to its specified peak pulse current of 4.1 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ90A-M3/5B maintains this clamping performance across its full operating temperature range from –55 °C to +150 °C.
Is SMBJ90A-M3/5B suitable for automotive applications requiring AEC-Q101 qualification?
No, SMBJ90A-M3/5B is not AEC-Q101 qualified. It carries the M3 suffix indicating halogen-free and RoHS compliance, but lacks automotive qualification. For AEC-Q101 compliance, Vishay specifies the HM3 suffix (e.g., SMBJ90A-HM3/5B), which undergoes additional stress testing including temperature cycling, humidity bias, and accelerated life validation. Engineers must select the HM3 variant explicitly for automotive body electronics or infotainment power rails.
How does the SMBJ90A-M3/5B differ from the SMBJ90CA-M3/5B in circuit implementation?
The SMBJ90A-M3/5B is unidirectional and must be installed with cathode toward the protected line (e.g., 90 V rail) and anode to ground, whereas the SMBJ90CA-M3/5B is bidirectional and symmetrical - it clamps both positive and negative transients without polarity dependency. This means SMBJ90A-M3/5B cannot replace SMBJ90CA-M3/5B in AC-coupled or floating differential lines like RS-485 without risking failure during negative surges. The SMBJ90A-M3/5B is intended for DC rail protection only.
What is the thermal resistance and recommended PCB layout for SMBJ90A-M3/5B to achieve full 600 W rating?
The SMBJ90A-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, achievable only when mounted on Vishay's recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Smaller pads increase thermal impedance, derating pulse power significantly - e.g., at 75 °C ambient, full 600 W is only sustainable for <0.01% duty cycle. The SMBJ90A-M3/5B datasheet Fig. 2 provides exact derating curves based on initial junction temperature.
Does SMBJ90A-M3/5B meet UL 497B recognition for telecom surge protection?
Yes, SMBJ90A-M3/5B is UL Recognized under file E136766 for protector classification per UL 497B, covering both unidirectional and bidirectional variants in the SMBJ family. This recognition validates its use in telecom interface protection circuits, including T1/E1 line cards and remote radio unit DC feeds, provided layout adheres to UL-specified creepage/clearance distances and grounding practices outlined in the certification documentation.
SMBJ90A-M3/5B 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:
- 1
- Bidirectional Channels:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ90A-M3/5B FAQ
1.How can I place an order for SMBJ90A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ90A-M3/5B 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 SMBJ90A-M3/5B reliable?
The price and inventory of SMBJ90A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ90A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ90A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ90A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ90A-M3/5B?
SMBJ90A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ90A-M3/5B 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 SMBJ90A-M3/5B?
For technical support, including SMBJ90A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ90A-M3/5B requirements.
6.How does Aetrix verify that SMBJ90A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ90A-M3/5B 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 SMBJ90A-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ90A-M3/5B?
All SMBJ90A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ90A-M3/5B, 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 SMBJ90A-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ90A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ90A-M3/5B Tags
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