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Vishay General Semiconductor - Diodes Division SMBG48A-M3/52
- Part No.:
- SMBG48A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG48A-M3/52.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,460
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Product details
Overview
SMBG48A-M3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMBG (DO-215AA) package, rated for 48 V stand-off voltage, 53.3–58.9 V breakdown at 1 mA, 77.4 V clamping voltage at 7.8 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform - deployed for overvoltage protection of 48 V automotive power rails and industrial sensor interfaces.
For engineers reviewing the SMBG48A-M3/52 datasheet, SMBG48A-M3/52 pinout, SMBG48A-M3/52 application, or SMBG48A-M3/52 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 TVS diode operates as a clamping device that remains high-impedance below 48 V and rapidly transitions to low-impedance conduction above its 53.3–58.9 V breakdown threshold, limiting transient-induced voltage excursions to ≤77.4 V at 7.8 A. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1.0 ns).
Designed for repetitive surge suppression under 0.01 % duty cycle, it delivers 600 W peak pulse power per 10/1000 μs waveform, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation up to +150 °C junction temperature in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 53.3 V / 58.9 V at 1 mA - guaranteed breakdown range defining turn-on threshold tolerance |
| VC @ IPPM | 77.4 V at 7.8 A - clamped voltage during worst-case 600 W transient, directly limiting downstream IC stress |
| PPPM | 600 W - peak pulse power handling capability with standard 10/1000 μs surge waveform |
| IFSM | 100 A - non-repetitive forward surge rating (8.3 ms half-sine), supporting load-dump immunity |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| Package | SMBG (DO-215AA) - low-profile surface-mount outline with 0.235–0.255" body length and cathode band marking |
Pinout & Package
SMBG48A-M3/52 uses the SMBG (DO-215AA) package: a gull-wing surface-mount outline with two terminals, matte tin-plated leads, and cathode identification via a molded band. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay's recommended layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side return | Completes conduction path during positive transients when cathode is held at higher potential |
| Cathode | Current exit point in forward bias; connected to protected line (e.g., 48 V rail) | Marked by visible band; defines polarity - device conducts only when cathode voltage exceeds anode by ≥VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22 standards |
| Halogen-free & RoHS compliant (M3) | Meets JEDEC J-STD-201 Class 2 whisker resistance and environmental compliance for industrial and automotive production |
| 600 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b, and ISO 16750-2 load-dump surges without degradation |
| Low incremental surge resistance | Enables tight clamping (77.4 V at 7.8 A) and minimal let-through energy to downstream MOSFETs or CAN transceivers |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free reflow profiles without preconditioning or special handling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (up to 60 V, 100 ms) on 48 V battery systems in ADAS ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between 48 V supply rail and chassis ground to shunt surge current away from DC-DC converters and microcontrollers. Use Value: Limits voltage excursion to ≤77.4 V during 100 A load-dump events, preventing latch-up or gate oxide damage in downstream 65 V-rated power stages. | Use Scenario: Protecting analog front-end inputs of pressure/temperature sensors in factory automation PLCs exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Standoff protection element on 24–48 V sensor supply lines, operating in high-impedance state until >53.3 V transients occur. Use Value: Sub-1 ns response ensures clamping before sensitive op-amps or ADC references are overstressed, maintaining signal integrity across 10 kHz bandwidth. |
| Telecom DC Power Feeding | Motor Drive Gate Driver Protection |
Use Scenario: Safeguarding PoE++ (IEEE 802.3bt Type 4) powered devices receiving up to 57 V DC over Ethernet cables subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp at the PD input stage, coordinated with upstream current limiting and secondary filtering. Use Value: 48 V VWM aligns with PoE++ nominal range; 77.4 V clamping ensures compliance with EN 61000-4-5 Level 4 (4 kV) surge immunity requirements. | Use Scenario: Shielding high-side N-channel MOSFET gate drivers in 48 V BLDC inverters from Miller-induced voltage spikes during fast switching transitions. IC Role / Device Role / Timing Role: Localized TVS mounted directly at gate driver output pin to clamp dv/dt-induced overshoot before reaching MOSFET gate oxide. Use Value: Low clamping voltage (77.4 V) prevents gate-source overvoltage beyond 20 V absolute max rating while sustaining 100 A surge capability for repeated commutation 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 |
|---|---|---|---|
| SMBJ48A-M3/52 | Same VWM (48 V), identical SMB (DO-214AA) package but 1.0 mm shorter body; 600 W rating, 77.4 V VC, but lower IPPM (7.5 A vs. 7.8 A) | SMBJ has slightly lower thermal mass and marginally reduced surge endurance under repeated 10/1000 μs pulses | Select SMBJ48A-M3/52 only if board space constraints require smaller footprint; verify pad thermal relief matches SMBJ thermal derating curve. |
| SMCJ48A-M3/52 | Same VWM and VC, but larger SMC (DO-214AB) package; 1500 W PPPM, 15.4 A IPPM, higher RθJA (60 °C/W) | Higher single-pulse energy handling but requires 3× PCB area and greater thermal pad area | Choose SMCJ48A-M3/52 where system-level surge testing exceeds IEC 61000-4-5 6 kV or where extended lifetime under frequent transients is required. |
Compared with SMBJ48A-M3/52 and SMCJ48A-M3/52, SMBG48A-M3/52 delivers optimal balance of 600 W surge capacity, AEC-Q101 qualification, halogen-free compliance, and compact SMBG footprint - making it preferred for space-constrained automotive and industrial 48 V systems requiring validated reliability without over-engineering.
Availability
SMBG48A-M3/52 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC feeding applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBG48A-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMBG Transient Voltage Suppressor series was engineered for high-reliability surface-mount surge protection in automotive, industrial, and telecom infrastructure - prioritizing AEC-Q101 qualification, low-profile packaging, and precise clamping control.
FAQ
What is the maximum clamping voltage of SMBG48A-M3/52 and under what test condition is it specified?
The SMBG48A-M3/52 has a maximum clamping voltage (VC) of 77.4 V, measured at a peak pulse current (IPPM) of 7.8 A using the standardized 10/1000 μs double-exponential surge waveform. This value is guaranteed across the full operating temperature range and reflects worst-case voltage let-through during transient events, ensuring downstream components remain within safe operating limits.
Is SMBG48A-M3/52 suitable for automotive applications, and what qualification does it hold?
Yes, SMBG48A-M3/52 is explicitly qualified to AEC-Q101 for automotive use. It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD per JESD22 standards. The M3 suffix confirms halogen-free, RoHS-compliant construction meeting automotive material requirements, and its 150 °C maximum junction temperature supports under-hood deployment.
How does the SMBG package differ from SMB and SMC packages for TVS diodes like SMBG48A-M3/52?
The SMBG (DO-215AA) package used by SMBG48A-M3/52 features a modified gull-wing leadform with tighter terminal spacing and optimized thermal pad layout versus SMB (DO-214AA). It provides identical 600 W surge rating to SMBJ but in a slightly longer body (0.235–0.255"), and differs from SMC (DO-214AB) by offering lower thermal resistance than SMB yet higher than SMC - balancing surge capability, board space, and thermal performance.
What is the reverse leakage current specification for SMBG48A-M3/52 at its stand-off voltage?
At its 48 V stand-off voltage (VWM), SMBG48A-M3/52 exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C. This ultra-low leakage ensures minimal power loss in always-on 48 V systems and avoids false triggering or signal distortion in high-impedance sensor supply paths, supporting precision analog and low-power IoT node designs.
Can SMBG48A-M3/52 be used in bidirectional configurations, and how is polarity identified?
No - SMBG48A-M3/52 is a unidirectional TVS diode, indicated by the "A" suffix (vs. "CA" for bidirectional variants). Polarity is marked by a cathode band on the package body; the banded end connects to the protected line (e.g., 48 V rail), while the unmarked end connects to ground. Bidirectional operation requires a separate part such as SMBG48CA-M3/52, which has symmetric breakdown in both directions.
SMBG48A-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):
- 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-M3/52 FAQ
1.How can I place an order for SMBG48A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG48A-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 SMBG48A-M3/52 reliable?
The price and inventory of SMBG48A-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 SMBG48A-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG48A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG48A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG48A-M3/52?
SMBG48A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG48A-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 SMBG48A-M3/52?
For technical support, including SMBG48A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG48A-M3/52 requirements.
6.How does Aetrix verify that SMBG48A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG48A-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 SMBG48A-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG48A-M3/52?
All SMBG48A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG48A-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 SMBG48A-M3/52 part is unused and in its original packaging.
Return procedure for SMBG48A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG48A-M3/52 Tags
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