My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBG48A-M3/5B
- Part No.:
- SMBG48A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG48A-M3/5B.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,802
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBG48A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR) at 1 mA, 77.4 V maximum clamping voltage (VC) at 7.8 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMBG48A-M3/5B datasheet, SMBG48A-M3/5B pinout, SMBG48A-M3/5B application, or SMBG48A-M3/5B equivalent, key selection criteria include verified clamping performance under 10/1000 μs surge, AEC-Q101 qualification for automotive use, halogen-free RoHS compliance (M3 suffix), and SMBG (DO-215AA) package compatibility with automated SMT assembly.
Technical Context
This unidirectional TVS diode operates as a shunt-clamping device, conducting above its breakdown threshold to limit transient voltages across protected circuit nodes. Its glass-passivated junction ensures stable leakage and fast response (<1 ns), while low incremental surge resistance enables effective energy diversion during ESD or load-switching events.
The SMBG48A-M3/5B is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable operation on standard 5.0 mm × 5.0 mm copper pads per terminal under repetitive 0.01% duty cycle surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating ceiling for normal circuit conditions. |
| VBR (min/max) | 53.3 V / 58.9 V at 1 mA - Verified breakdown range ensuring predictable turn-on behavior across production lots and temperature. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamping voltage measured under 10/1000 μs surge; determines worst-case voltage seen by downstream ICs during transients. |
| PPPM | 600 W - Peak pulse power handling capability; supports high-energy surge suppression without failure under defined waveform. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against inrush or fault currents in power rails. |
| TJ max | +150 °C - Maximum junction temperature; enables deployment in under-hood automotive or high-ambient industrial environments. |
| Package | SMBG (DO-215AA) - Low-profile surface-mount outline with 0.235–0.255 inch body length; optimized for automated placement and reflow compatibility. |
Pinout & Package
SMBG48A-M3/5B uses the SMBG (DO-215AA) package: a two-terminal, gull-wing surface-mount outline with cathode band marking. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point in reverse-biased protection configuration | Connected to protected line (e.g., CAN_H, 12 V rail); conducts when transient exceeds VWM, shunting surge to ground. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping path and defines reference for VWM/VC ratings. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS sensors, and infotainment power rails. |
| Halogen-free & RoHS compliant (M3 suffix) | Meets environmental compliance requirements for industrial and automotive OEMs without compromising surge robustness or thermal performance. |
| 600 W peak pulse power (10/1000 μs) | Provides margin against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 surges in 12 V/24 V systems. |
| Low clamping ratio (VC/VBR ≈ 1.34) | Minimizes overvoltage stress on protected MOSFETs or interface ICs during clamping - critical for 5 V or 3.3 V logic-level components. |
| MSL Level 1 (J-STD-020), 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in vehicle ECUs. IC Role / Device Role: Shunt-clamping TVS placed between signal line and ground, activated only during overvoltage events exceeding 48 V. Use Value: Prevents latch-up or permanent damage to 5 V tolerant transceivers by limiting transient voltage to ≤77.4 V, validated under AEC-Q101 stress conditions. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to field-wiring surges and relay coil flyback in factory automation. IC Role / Device Role: Primary overvoltage clamp on 24 V DC input channels, coordinated with upstream fusing and filtering. Use Value: Maintains functional safety integrity by clamping 1 kV/500 A surges (per IEC 61000-4-5) without degradation, supported by 100 A IFSM rating. |
| DC Power Rail Protection | Telecom Interface Protection |
Use Scenario: Secondary surge suppression on 48 V telecom power distribution boards downstream of primary MOV-based protection. IC Role / Device Role: Fast-response secondary clamp preventing overshoot propagation to DC-DC converters and PMICs. Use Value: Achieves <1 ns response time and low VC/VBR ratio to protect sensitive 3.3 V/5 V regulation stages without adding capacitance-induced signal distortion. | Use Scenario: Protecting RS-485 transceiver bus lines in outdoor base station equipment subject to lightning-induced surges. IC Role / Device Role: Unidirectional TVS on differential pair (A/B) referenced to local ground, sized for common-mode transient suppression. Use Value: Delivers 600 W pulse handling with 77.4 V clamping to preserve signal integrity and prevent receiver saturation during 10/1000 μs events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG48A-E3/5B | Same electrical specs and SMBG package; uses standard RoHS-compliant (non-halogen-free) molding compound. | Approved for industrial but not automotive AEC-Q101 applications; lacks halogen-free certification. | Select when halogen-free requirement is not mandated and cost optimization is prioritized. |
| SMBG48AHM3/5B | Identical electrical and mechanical specs; adds AEC-Q101 qualification and halogen-free RoHS compliance. | Explicitly certified for automotive use cases requiring full AEC-Q101 validation (e.g., powertrain, chassis). | Choose for new automotive designs where full qualification documentation and traceability are mandatory. |
Compared with SMBG48A-M3/5B, SMBG48A-E3/5B omits halogen-free compliance and AEC-Q101 qualification, while SMBG48AHM3/5B provides identical performance with formal automotive qualification - making the M3 variant the optimal balance of automotive readiness and industrial flexibility.
Availability
SMBG48A-M3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and 48 V DC power rail protection requiring stable component supply, long-term lifecycle support, and halogen-free compliance.
Supply support for SMBG48A-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, efficiency, and application-specific performance.
The SMBG TransZORB® series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness, AEC-Q101 compliance, and precise clamping are non-negotiable.
FAQ
What is the clamping voltage of the SMBG48A-M3/5B under a 10/1000 μs surge?
The SMBG48A-M3/5B has a maximum clamping voltage (VC) of 77.4 V at 7.8 A peak pulse current under the standardized 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88456 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring compatibility with 5 V or 3.3 V interface ICs downstream of the SMBG48A-M3/5B.
Is SMBG48A-M3/5B suitable for automotive applications?
Yes, SMBG48A-M3/5B is AEC-Q101 qualified and explicitly rated for automotive use per Vishay's documentation. Its construction includes halogen-free, RoHS-compliant materials (M3 suffix), MSL Level 1 reflow compatibility, and validation across temperature cycling, HTRB, and surge tests - making it appropriate for engine control units, ADAS sensor interfaces, and body electronics where SMBG48A-M3/5B must withstand under-hood thermal and electrical stress.
What does the "M3" suffix indicate in SMBG48A-M3/5B?
The "M3" suffix in SMBG48A-M3/5B denotes halogen-free, RoHS-compliant construction with industrial-grade reliability - distinct from "E3" (RoHS-compliant but not halogen-free) and "HM3" (AEC-Q101 qualified + halogen-free). The M3 variant meets JESD 201 Class 2 whisker resistance and is approved for high-reliability industrial and automotive-adjacent applications where halogen content restrictions apply, without requiring full AEC-Q101 certification.
How does SMBG48A-M3/5B differ from bidirectional TVS diodes like SMBG48CA?
SMBG48A-M3/5B is unidirectional and functions as a polarity-sensitive clamp - conducting only when cathode voltage exceeds anode by >VBR. In contrast, SMBG48CA is bidirectional with symmetrical breakdown in both directions, suited for AC or differential signal lines. SMBG48A-M3/5B offers lower leakage and tighter VBR tolerance than its CA counterpart, making it preferred for DC power rail and single-ended signal protection where polarity is fixed and leakage must be minimized.
What PCB pad layout is recommended for SMBG48A-M3/5B to achieve rated thermal performance?
Vishay specifies that SMBG48A-M3/5B achieves its rated 600 W peak pulse power and thermal resistance (RθJA = 100 °C/W) when mounted on 0.2" x 0.2" (5.0 mm x 5.0 mm) copper pads per terminal. Deviation from this layout reduces surge handling capability and increases junction temperature - so PCB design must replicate this minimum copper area for each terminal to ensure SMBG48A-M3/5B performs to datasheet specifications under repetitive surge conditions.
SMBG48A-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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- 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)
SMBG48A-M3/5B FAQ
1.How can I place an order for SMBG48A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG48A-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 SMBG48A-M3/5B reliable?
The price and inventory of SMBG48A-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 SMBG48A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBG48A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG48A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG48A-M3/5B?
SMBG48A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG48A-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 SMBG48A-M3/5B?
For technical support, including SMBG48A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG48A-M3/5B requirements.
6.How does Aetrix verify that SMBG48A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG48A-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 SMBG48A-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBG48A-M3/5B?
All SMBG48A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG48A-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 SMBG48A-M3/5B part is unused and in its original packaging.
Return procedure for SMBG48A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG48A-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 …
