My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBG28A-M3/5B
- Part No.:
- SMBG28A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG28A-M3/5B.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,779
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBG28A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, with 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 45.4 V clamping voltage (VC) at 13.2 A peak pulse current, and 600 W peak pulse power rating under 10/1000 μs waveform - used for protecting MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial control systems.
For engineers reviewing the SMBG28A-M3/5B datasheet, SMBG28A-M3/5B pinout, SMBG28A-M3/5B application, or SMBG28A-M3/5B equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), 150 °C max junction temperature, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a clamping-type TVS diode, leveraging an avalanche breakdown mechanism to limit transient overvoltages across protected circuits. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 μA at VWM), while its low incremental surge resistance enables effective energy diversion during fast-rising ESD or load-switching events.
The SMBG28A-M3/5B is rated for repetitive 10/1000 μs surges at 0.01 % duty cycle and supports peak forward surge current of 100 A (8.3 ms half-sine), making it suitable for high-energy transient suppression in DC power rails and I/O interfaces where thermal management relies on PCB copper pad area per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - defines guaranteed avalanche initiation range for design margining |
| VC @ IPPM | 45.4 V at 13.2 A - clamped voltage seen by protected circuit during full-rated 600 W transient |
| PPPM | 600 W - peak pulse power handling capability with 10/1000 μs waveform, derated above 25 °C |
| IFSM | 100 A - single half-sine surge current rating (8.3 ms), critical for inductive load switch protection |
| TJ max | 150 °C - maximum junction temperature, enabling operation in under-hood automotive environments |
| Package | SMBG (DO-215AA) - low-profile surface-mount outline with 0.235" × 0.255" footprint and MSL Level 1 moisture sensitivity |
Pinout & Package
SMBG28A-M3/5B uses the SMBG (DO-215AA) package: molded plastic case with matte tin-plated leads, 0.235" × 0.255" body size, 0.030" lead thickness, and cathode band marking on the anode-side terminal. Mounting requires 5.0 mm × 5.0 mm copper pads per terminal for thermal and surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage event |
| Anode | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Halogen-free & RoHS compliant (M3) | Meets JESD201 Class 2 whisker resistance and global environmental compliance without brominated flame retardants |
| 600 W peak pulse power (10/1000 μs) | Supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surge events in 12 V/24 V systems |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage stress on downstream silicon while maintaining fast response (<1 ns typical) |
| MSL Level 1 (260 °C peak reflow) | Enables standard lead-free SMT assembly without pre-baking or special handling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump transients on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp spikes up to 35 V. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤45.4 V, preventing latch-up or permanent damage per ISO 16750-2. | Use Scenario: Protecting analog output lines of pressure sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Clamping inductive kickback from solenoid drivers sharing common ground with sensor signal paths. Use Value: Maintains signal integrity by limiting transient coupling to <100 mV overshoot at sensor ADC input, verified per IEC 61000-4-4 EFT testing. |
| DC Motor Drive Gate Protection | Telecom Power Supply Input Stage |
Use Scenario: Safeguarding high-side N-channel MOSFET gate drivers in brushed DC motor controllers. IC Role / Device Role / Timing Role: Placed across gate-source terminals to absorb Miller-induced voltage spikes during fast switching. Use Value: Prevents gate oxide rupture by clamping VGS transients to ≤45.4 V, supporting 20 kHz PWM without degradation over 10,000 cycles. | Use Scenario: Front-end surge suppression on 48 V telecom rectifier outputs feeding base station backplanes. IC Role / Device Role / Timing Role: Primary clamping element upstream of bulk capacitors and DC/DC converters. Use Value: Absorbs 600 W surges per IEC 61000-4-5 Level 4 (4 kV line-earth), reducing secondary protector stress and extending system MTBF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG28A-E3/5B | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3) | Acceptable for industrial use where halogen-free requirement is not mandated | Select SMBG28A-E3/5B if material compliance allows standard RoHS without halogen restriction |
| SMBG28AHM3/5B | Identical specs plus AEC-Q101 qualification (HM3 = halogen-free + AEC-Q101) | Required for automotive safety-critical modules needing full qualification evidence | Choose SMBG28AHM3/5B when automotive OEM PPAP documentation and stress test reports are mandatory |
Compared with SMBG28A-M3/5B, SMBG28A-E3/5B lacks halogen-free certification but offers identical surge performance, while SMBG28AHM3/5B adds formal AEC-Q101 validation-making it preferable for Tier 1 automotive designs where qualification traceability is contractually required.
Availability
SMBG28A-M3/5B is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and DC motor drive gate protection requiring stable component supply, consistent halogen-free compliance, and AEC-Q101-aligned reliability.
Supply support for SMBG28A-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 high-reliability, automotive-qualified, and industry-standard solutions.
The SMBG series was developed for surface-mount transient suppression in space-constrained, high-surge environments - targeting automotive, industrial, and telecom applications where robustness, repeatability, and standardized packaging are essential.
FAQ
What is the clamping voltage of SMBG28A-M3/5B at its rated peak pulse current?
The SMBG28A-M3/5B has a maximum clamping voltage (VC) of 45.4 V at 13.2 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during full-rated transient events. The SMBG28A-M3/5B maintains this clamping performance across its specified operating temperature range.
Is SMBG28A-M3/5B suitable for automotive applications?
Yes, SMBG28A-M3/5B is halogen-free and RoHS compliant, and belongs to the AEC-Q101-qualified SMBG family - though the specific M3 suffix denotes industrial-grade qualification. For full automotive qualification, SMBG28AHM3/5B (with HM3 suffix) is the designated AEC-Q101 variant. Engineers must verify OEM requirements before deploying SMBG28A-M3/5B in safety-critical vehicle subsystems.
What does the "M3" suffix mean in SMBG28A-M3/5B?
The "M3" suffix in SMBG28A-M3/5B indicates halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, intended for industrial-grade applications. It distinguishes the part from E3 (RoHS only) and HM3 (AEC-Q101 + halogen-free) variants. The "5B" denotes 13-inch tape-and-reel packaging with 3200 units per reel - critical for SMT line feed consistency.
How does SMBG28A-M3/5B differ from SMBG28A-E3/5B?
SMBG28A-M3/5B and SMBG28A-E3/5B share identical electrical characteristics and package dimensions, but differ in material composition: M3 is halogen-free and meets JESD201 Class 2 whisker resistance, whereas E3 is RoHS-compliant without halogen restrictions. Both are industrial-grade; neither carries AEC-Q101 certification unless marked with HE3 or HM3 suffixes.
What PCB layout guidance applies to SMBG28A-M3/5B for optimal surge performance?
For optimal surge performance, SMBG28A-M3/5B must be mounted on minimum 5.0 mm × 5.0 mm copper pads per terminal, as specified in the Vishay datasheet. Trace inductance between the TVS and protected node should be minimized, and ground connections must be low-impedance. Thermal relief patterns are discouraged; solid copper pours improve both surge dissipation and long-term reliability under repetitive transients.
SMBG28A-M3/5B 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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 13.2A
- 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)
SMBG28A-M3/5B FAQ
1.How can I place an order for SMBG28A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG28A-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 SMBG28A-M3/5B reliable?
The price and inventory of SMBG28A-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 SMBG28A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBG28A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG28A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG28A-M3/5B?
SMBG28A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG28A-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 SMBG28A-M3/5B?
For technical support, including SMBG28A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG28A-M3/5B requirements.
6.How does Aetrix verify that SMBG28A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG28A-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 SMBG28A-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBG28A-M3/5B?
All SMBG28A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG28A-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 SMBG28A-M3/5B part is unused and in its original packaging.
Return procedure for SMBG28A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG28A-M3/5B 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 …
