My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBG8.5A-M3/52
- Part No.:
- SMBG8.5A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG8.5A-M3/52.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,090
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBG8.5A-M3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA, 14.4 V maximum clamping voltage (VC) at 20 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMBG8.5A-M3/52 datasheet, SMBG8.5A-M3/52 pinout, SMBG8.5A-M3/52 application, or SMBG8.5A-M3/52 equivalent, key selection criteria include verified clamping performance under 20 A surge, halogen-free RoHS compliance (M3 suffix), AEC-Q101 qualification, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its 14.4 V clamping voltage at 20 A ensures reliable protection of 3.3 V and 5 V logic interfaces without overstressing downstream ICs.
The SMBG8.5A-M3/52 is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and delivers 100 A non-repetitive forward surge current capability - enabling use in high-energy transients induced by inductive load switching in automotive power distribution systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse working voltage before clamping begins; sets threshold for protection of 8 V nominal supply rails. |
| VBR (min/max) | 9.44 V / 10.4 V at 1 mA - Confirmed breakdown range ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM | 14.4 V at 20 A - Clamping voltage during 10/1000 μs surge; limits stress on protected 3.3 V/5 V ICs within safe SOA margins. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform at 0.01 % duty cycle; supports repetitive surge events in motor control circuits. |
| IFSM | 100 A - Non-repetitive 8.3 ms half-sine surge rating; qualifies for protection against load dump and alternator transients. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and sealed industrial enclosures. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs heatsinking requirements for sustained surge duty. |
Pinout & Package
Package: SMBG (DO-215AA) - surface-mount, low-profile, halogen-free, RoHS-compliant package with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Protected circuit side (anode connected to ground or lower potential) | Reverse-biased during normal operation; conducts only during overvoltage to clamp to VC and shunt surge energy to reference plane. |
| Anode (unmarked end) | Reference/return path (typically system ground or common rail) | Provides low-impedance return path for surge current; must be routed with minimal inductance to maintain clamping integrity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for ECU, ADAS, and body control modules. |
| Halogen-free & RoHS compliant (M3 suffix) | Meets IEC 61249-2-21 and JEDEC J-STD-20E; eliminates brominated flame retardants while maintaining UL 94 V-0 flammability rating. |
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against ISO 7637-2 Pulse 1, 2a, and 5a transients without cascaded TVS stages. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Indicates high surge current handling efficiency and minimal voltage overshoot during fast transients - critical for protecting low-voltage microcontrollers. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk during assembly. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
|
Use Scenario: Protection of 12 V battery-fed power rails in engine control units against load dump and alternator surges. IC Role / Device Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps transients up to 14.4 V at 20 A, preventing damage to 36 V-rated input stages while maintaining <100 ns response. |
Use Scenario: ESD and surge protection on analog output lines (e.g., 4–20 mA current loop) of pressure sensors in factory automation. IC Role / Device Role: Low-capacitance TVS mounted directly at connector interface to suppress IEC 61000-4-2/4-5 events. Use Value: 14.4 V clamping ensures sensor ICs remain within absolute maximum ratings during 1 kV/30 A surge events. |
| Consumer USB Power Ports | Telecom Base Station Control Lines |
|
Use Scenario: Overvoltage protection on 5 V VBUS line of USB Type-A ports in smart home hubs. IC Role / Device Role: Standoff-rated TVS placed upstream of USB power switch to absorb hot-plug and cable-induced spikes. Use Value: 8.5 V VWM allows clean 5 V operation while clamping >12 V transients - avoids false triggering during brownout conditions. |
Use Scenario: Transient suppression on RS-485 control lines connecting baseband unit to remote radio heads. IC Role / Device Role: Unidirectional TVS referenced to local ground, guarding PHY transceivers against lightning-induced surges. Use Value: 600 W PPPM rating sustains repeated 10/1000 μs surges per IEC 61000-4-5 Level 4 without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG8.5A-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3). | Acceptable for industrial non-automotive designs where halogen-free requirement is absent. | Select SMBG8.5A-E3/52 when halogen-free material is not mandated and cost optimization is prioritized. |
| SMBG8.5AHM3/52 | Identical electrical and mechanical specs; adds AEC-Q101 qualification (HM3 suffix denotes AEC-Q101 + halogen-free). | Required for automotive safety-critical subsystems requiring full AEC-Q101 documentation and traceability. | Choose SMBG8.5AHM3/52 when functional safety compliance (e.g., ISO 26262 ASIL-B support) is mandatory. |
Compared with SMBG8.5A-M3/52, the E3 variant offers identical protection performance without halogen-free assurance, while the HM3 variant adds formal AEC-Q101 certification - making SMBG8.5A-M3/52 the optimal balance of automotive-grade reliability, halogen-free compliance, and cost for Tier 2/3 automotive and high-reliability industrial applications.
Availability
SMBG8.5A-M3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and consumer USB power protection requiring stable component supply, halogen-free compliance, and AEC-Q101-qualified reliability.
Supply support for SMBG8.5A-M3/52 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 high-reliability, automotive-qualified components.
The SMBG series was engineered for surface-mount transient suppression in space-constrained, high-surge environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 validation and robust 600 W pulse handling.
FAQ
What is the clamping voltage of SMBG8.5A-M3/52 at its rated peak pulse current?
The SMBG8.5A-M3/52 has a maximum clamping voltage (VC) of 14.4 V at 20 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream 3.3 V and 5 V ICs. The SMBG8.5A-M3/52 maintains this clamping performance across its specified operating temperature range.
Is SMBG8.5A-M3/52 suitable for automotive applications?
Yes, SMBG8.5A-M3/52 is AEC-Q101 qualified and rated for -55 °C to +150 °C junction temperature, making it suitable for under-hood and cabin automotive applications. Its 100 A IFSM rating and 600 W PPPM support protection against load dump and ISO 7637-2 transients. The M3 suffix confirms halogen-free construction required by many Tier 1 automotive OEMs. SMBG8.5A-M3/52 meets these requirements without derating.
How does the M3 suffix differ from E3 in SMBG8.5A-M3/52?
The M3 suffix indicates halogen-free, RoHS-compliant construction meeting IEC 61249-2-21, whereas E3 is RoHS-compliant but contains halogenated flame retardants. Both share identical electrical specifications, package (SMBG/DO-215AA), and thermal characteristics. SMBG8.5A-M3/52 is preferred for environmentally regulated markets and automotive supply chains requiring halogen-free declarations. The SMBG8.5A-M3/52 datasheet confirms full equivalence except for material composition.
What is the thermal resistance of SMBG8.5A-M3/52, and how does it affect layout?
SMBG8.5A-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's outline drawing. To maintain safe junction temperatures during repetitive surges, PCB layout must provide adequate copper area and avoid thermal bottlenecks - especially critical in enclosed automotive modules. SMBG8.5A-M3/52 thermal performance is validated under these conditions.
Does SMBG8.5A-M3/52 have polarity marking, and how is it oriented in circuit?
Yes, SMBG8.5A-M3/52 is unidirectional and marked with a cathode band on the SMBG (DO-215AA) package. During normal operation, the cathode connects to the protected line (e.g., 12 V rail), and the anode connects to ground or the lower-potential reference. This orientation ensures reverse-biased operation until overvoltage occurs, at which point the SMBG8.5A-M3/52 conducts and clamps the line to ≤14.4 V. Incorrect polarity would prevent proper protection.
SMBG8.5A-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- 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):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 41.7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG8.5A-M3/52 FAQ
1.How can I place an order for SMBG8.5A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG8.5A-M3/52 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 SMBG8.5A-M3/52 reliable?
The price and inventory of SMBG8.5A-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG8.5A-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG8.5A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG8.5A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG8.5A-M3/52?
SMBG8.5A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG8.5A-M3/52 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 SMBG8.5A-M3/52?
For technical support, including SMBG8.5A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG8.5A-M3/52 requirements.
6.How does Aetrix verify that SMBG8.5A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG8.5A-M3/52 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 SMBG8.5A-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG8.5A-M3/52?
All SMBG8.5A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG8.5A-M3/52, 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 SMBG8.5A-M3/52 part is unused and in its original packaging.
Return procedure for SMBG8.5A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG8.5A-M3/52 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 …
