My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ8.5D-M3/I
;;2.jpg)
- Part No.:
- SMBJ8.5D-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.5D-M3/I.pdf
- Description:
- TVS DIODE 8.5VWM 14.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,423
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ8.5D-M3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, with 8.5 V stand-off voltage (VWM), 9.57–10.3 V breakdown voltage (VBR) at 1 mA, 14.3 V clamping voltage (VC) at 15 A peak pulse current, and 600 W peak pulse power rating per 10/1000 μs waveform - used for protecting MOSFETs and ICs against inductive switching transients in industrial power supplies.
For engineers reviewing the SMBJ8.5D-M3/I datasheet, SMBJ8.5D-M3/I pinout, SMBJ8.5D-M3/I application, or SMBJ8.5D-M3/I equivalent, key selection criteria include unidirectional polarity, ±3.5 % VBR tolerance, 0.5 μA max reverse leakage at VWM, M3 halogen-free RoHS-compliant industrial-grade construction, and J-STD-020 MSL Level 1 reflow compatibility.
Technical Context
This TVS diode operates as a clamping-type overvoltage protection device, triggered when reverse voltage exceeds its specified breakdown range. It exhibits fast response time (<1 ns), low incremental surge resistance, and stable clamping performance under repetitive 10/1000 μs transients at 0.01 % duty cycle.
Designed for PCB-level surge suppression, SMBJ8.5D-M3/I functions in series with sensitive downstream components, diverting transient energy to ground while maintaining <14.3 V across the protected node during a 15 A surge. Its thermal resistance (RθJA = 125 °C/W on minimum pad layout) supports operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 9.57 V / 10.3 V at 1 mA - tight ±3.5 % tolerance ensures predictable turn-on threshold |
| VC @ IPPM | 14.3 V at 15 A - clamping voltage limits stress on protected ICs during surge events |
| PPPM | 600 W - peak pulse power handling capability with standard 10/1000 μs waveform |
| ID @ VWM | 0.5 μA max - ultra-low leakage preserves signal integrity and battery life in standby |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated assembly and IPC-7351B standards |
| Operating TJ | −55 °C to +150 °C - wide temperature range supports industrial and automotive under-hood environments |
Pinout & Package
Two-terminal unidirectional TVS diode in SMB (DO-214AA) package; cathode indicated by molded band on case. Matte tin-plated leads meet J-STD-002 solderability and JESD 22-B102 whisker resistance (Class 2). Molding compound complies with UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Connected to protected circuit's low-side reference (e.g., GND or return path) | Completes conduction path during reverse transient; must be routed with low-inductance trace to earth ground |
| Cathode (banded end) | Connected to protected line (e.g., VCC, signal, or power rail) | Defines unidirectional blocking direction; clamps positive transients to cathode potential |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise coordination with system overvoltage thresholds without margin stacking |
| 600 W PPPM (10/1000 μs) | Handles common IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) on 12 V rails without degradation |
| MSL Level 1 (260 °C peak) | Supports single-pass lead-free reflow without preconditioning or baking |
| M3 suffix compliance | Guarantees halogen-free, RoHS-compliant, industrial-grade reliability per JESD 201 Class 2 |
| Low RINC | Minimizes voltage overshoot during fast-rising transients (e.g., relay coil flyback) |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and logic inputs against flyback voltage from solenoid and relay coils in PLC output stages. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between driver output and ground, activated within <1 ns of overvoltage event. Use Value: Limits gate-source voltage to ≤14.3 V during 15 A inductive kick, preventing MOSFET avalanche failure and ensuring >100,000-cycle reliability. | Use Scenario: Input line protection for LIN bus transceivers and microcontroller I/O pins exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply rail upstream of LDO, clamping transients before they reach sensitive analog front-ends. Use Value: Maintains 8.5 V nominal rail integrity while suppressing 100 V/50 ms load dump spikes to safe levels per ISO 7637-2 Pulse 5a. |
| Telecom Power Rectifiers | Consumer Appliance Control Boards |
Use Scenario: Secondary-side surge protection on DC outputs of AC/DC adapters powering base station RF modules. IC Role / Device Role / Timing Role: Unidirectional TVS mounted directly at rectifier output capacitor, shunting surge energy before it propagates to downstream DC-DC converters. Use Value: Prevents latch-up in buck controller ICs by limiting transient overshoot to <14.3 V during 600 W surge events. | Use Scenario: Overvoltage safeguard for microcontroller reset lines and sensor interface circuits in washing machine main control units. IC Role / Device Role / Timing Role: Low-leakage (0.5 μA) TVS on 3.3 V or 5 V logic rails, providing fail-safe immunity to ESD and board-level coupling. Use Value: Eliminates false resets and sensor data corruption during 8 kV contact ESD events per IEC 61000-4-2, with no impact on quiescent current budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5A-M3/I | Bidirectional variant; same VWM (8.5 V), symmetric clamping in both polarities | Required where AC-coupled signals or dual-polarity transients (e.g., RS-485) need protection | Select SMBJ8.5A-M3/I only if bidirectional clamping is explicitly required; SMBJ8.5D-M3/I offers lower leakage and tighter VBR tolerance for DC rails |
| SMCJ8.5A-M3/I | Larger SMC (DO-214AB) package; same electrical specs but higher 1500 W PPPM rating | Suitable for higher-energy surge environments (e.g., outdoor telecom enclosures) requiring extended surge lifetime | Choose SMCJ8.5A-M3/I when system-level testing requires >600 W margin; SMBJ8.5D-M3/I optimizes board space and cost for standard industrial IEC 61000-4-5 compliance |
Compared with SMBJ8.5A-M3/I and SMCJ8.5A-M3/I, SMBJ8.5D-M3/I delivers optimal balance of precision clamping (±3.5 % VBR), compact SMB footprint, and industrial-grade M3 qualification - making it the preferred choice for space-constrained DC power rail protection where unidirectional transients dominate.
Availability
SMBJ8.5D-M3/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power rectifiers requiring stable component supply, long-term lifecycle support, and full traceability.
Supply support for SMBJ8.5D-M3/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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust, standardized transient suppression in surface-mount power and signal line protection across consumer, computing, and industrial systems.
FAQ
What is the clamping voltage of SMBJ8.5D-M3/I and how is it measured?
The SMBJ8.5D-M3/I has a maximum clamping voltage (VC) of 14.3 V, measured at a peak pulse current (IPPM) of 15 A using the standardized 10/1000 μs double-exponential waveform. This value reflects the actual voltage seen across the device terminals during surge conduction and is critical for ensuring downstream ICs remain within their absolute maximum ratings.
Does SMBJ8.5D-M3/I support lead-free reflow soldering?
Yes, SMBJ8.5D-M3/I meets J-STD-020 MSL Level 1 with a maximum peak reflow temperature of 260 °C, enabling compatibility with standard lead-free (SnAgCu) reflow profiles without preconditioning or baking. Its matte tin-plated terminations also comply with J-STD-002 for solderability assurance.
How does the M3 suffix affect SMBJ8.5D-M3/I's compliance and reliability?
The M3 suffix on SMBJ8.5D-M3/I certifies halogen-free, RoHS-compliant construction, industrial-grade temperature rating (−55 °C to +150 °C), and JESD 201 Class 2 whisker resistance. It confirms suitability for high-reliability applications where long-term stability and regulatory compliance are mandatory - distinct from commercial-grade variants.
Can SMBJ8.5D-M3/I be used in bidirectional signal line protection?
No - SMBJ8.5D-M3/I is strictly unidirectional, with polarity defined by the cathode band. For bidirectional protection (e.g., on AC-coupled or differential lines), use the SMBJ8.5CD-M3/I variant, which provides symmetrical clamping in both directions and omits the cathode marking.
What is the thermal resistance of SMBJ8.5D-M3/I and how does it impact power derating?
SMBJ8.5D-M3/I has a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W when mounted on the minimum recommended PCB pad layout. This value determines steady-state power dissipation limits: at 25 °C ambient, max continuous power is 1.0 W; derating begins above 25 °C at 8 mW/°C, reaching zero at 150 °C junction temperature.
SMBJ8.5D-M3/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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.57V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 42.2A
- 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)
SMBJ8.5D-M3/I FAQ
1.How can I place an order for SMBJ8.5D-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.5D-M3/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 SMBJ8.5D-M3/I reliable?
The price and inventory of SMBJ8.5D-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.5D-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ8.5D-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.5D-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.5D-M3/I?
SMBJ8.5D-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.5D-M3/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 SMBJ8.5D-M3/I?
For technical support, including SMBJ8.5D-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.5D-M3/I requirements.
6.How does Aetrix verify that SMBJ8.5D-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ8.5D-M3/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 SMBJ8.5D-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ8.5D-M3/I?
All SMBJ8.5D-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.5D-M3/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 SMBJ8.5D-M3/I part is unused and in its original packaging.
Return procedure for SMBJ8.5D-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.5D-M3/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
