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Vishay General Semiconductor - Diodes Division SMBG48CA-E3/5B
- Part No.:
- SMBG48CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG48CA-E3/5B.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,436
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Product details
Overview
SMBG48CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of signal and power lines. It features a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 77.4 V at 7.8 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG48CA-E3/5B datasheet, SMBG48CA-E3/5B pinout, SMBG48CA-E3/5B application, or SMBG48CA-E3/5B equivalent, key selection criteria include bidirectional clamping behavior, low clamping ratio (VC/VBR ≈ 1.38), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, IPPM, and VC specifications for positive and negative transients. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), critical for protecting sensitive inputs against ESD and inductive switching spikes.
The device uses a planar silicon avalanche structure optimized for low incremental surge resistance and repeatable clamping performance under repetitive 0.01% duty-cycle surges. Thermal design relies on RθJL = 20 °C/W to lead and RθJA = 100 °C/W to ambient (on 5.0 mm × 5.0 mm pads), supporting operation from –55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 53.3 V / 58.9 V at 1 mA - Confirmed breakdown range ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamping voltage during 10/1000 µs surge; limits protected circuit stress to ≤77.4 V under rated pulse. |
| PPPM | 600 W - Peak pulse power handling capability per JEDEC standard waveform; enables protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage at stand-off voltage preserves signal integrity and minimizes standby power loss. |
| TJ max | +150 °C - Maximum junction temperature rating supports under-hood automotive and industrial environments without derating. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM ≥8 kV. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing leads, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional symmetry eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals function identically; surge current flows bidirectionally through the same avalanche junction - no orientation required on PCB. |
| Leads (both) | Thermal and electrical interface | Provide mechanical attachment, low-inductance surge return path, and primary heat conduction to PCB copper pads (5.0 mm × 5.0 mm recommended). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN, RS-485, sensor bridges) without polarity constraints. |
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy transients such as ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Combination Wave (10/700 µs) up to specified current. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage overshoot during clamping - critical for safeguarding 48 V system ICs with 80 V absolute maximum ratings. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules where field failure risk must be minimized. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free reflow profiles without pre-baking, reducing manufacturing complexity and cost. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery rail inputs in vehicle ECUs against load dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role: Primary overvoltage clamp placed upstream of DC-DC converters and microcontroller power supplies. Use Value: Limits input voltage to ≤77.4 V during 100 V/100 ms surges, preventing damage to downstream 80 V-rated MOSFETs and PMICs. | Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors in factory automation PLCs exposed to relay coil flyback. IC Role / Device Role: Bidirectional shunt protector on differential sensor lines (e.g., 4–20 mA loop, Wheatstone bridge outputs). Use Value: Symmetric clamping prevents signal inversion or offset shift during ±1 kV EFT bursts, maintaining measurement accuracy. |
| Telecom Data Line Surge Suppression | Consumer USB-C Port ESD Protection |
Use Scenario: Shielding RS-485 transceivers in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role: Secondary-level TVS placed after gas discharge tube (GDT) primary protection to handle residual energy. Use Value: 77.4 V clamping ensures transceiver I/O stays within ±12 V common-mode range even during 4 kV 10/700 µs line-to-ground surges. | Use Scenario: Protecting USB-C CC and VCONN pins in portable chargers against human-body-model (HBM) ESD events. IC Role / Device Role: Low-capacitance (<50 pF typical at 0 V) bidirectional clamp integrated into compact USB-C connector subassembly. Use Value: Sub-1 ns response captures ESD before it reaches USB PD controller, while 1.0 µA leakage avoids battery drain in always-on mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48CA | Same VWM (48 V), but lower PPPM = 600 W (same rating), higher VC = 79.4 V at 7.5 A; non-AEC-Q101. | General industrial use only; not qualified for automotive under-hood deployment. | Select when AEC-Q101 is not required and board space allows same SMB package footprint. |
| SMCJ48CA | Same VWM and VBR, but larger SMC (DO-214AB) package; PPPM = 1500 W, VC = 77.0 V at 19.4 A. | Higher-power systems requiring >600 W surge handling or improved thermal dissipation. | Choose when surge energy exceeds SMBG48CA-E3/5B capability or when board layout accommodates larger 7.1 mm × 6.2 mm outline. |
Compared with SMBJ48CA and SMCJ48CA, the SMBG48CA-E3/5B uniquely combines AEC-Q101 qualification, SMBG's low-profile gull-wing geometry for dense layouts, and verified 600 W clamping performance - making it optimal for space-constrained automotive and industrial modules where reliability and manufacturability are co-prioritized.
Availability
SMBG48CA-E3/5B is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom data interfaces, and consumer USB-C power delivery systems requiring stable component supply and full traceability.
Supply support for SMBG48CA-E3/5B 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, TVS devices, and optoelectronics with emphasis on high-reliability, high-efficiency solutions.
The SMBG series was developed specifically for surface-mount transient suppression in automotive and industrial applications demanding AEC-Q101 compliance, low-profile packaging, and repeatable clamping performance under repetitive surge conditions.
FAQ
What does the "CA" suffix indicate in SMBG48CA-E3/5B?
The "CA" suffix denotes a bidirectional configuration - meaning the SMBG48CA-E3/5B provides symmetrical transient voltage suppression for both positive and negative polarity surges. Unlike unidirectional variants (e.g., SMBG48A), it has no cathode marking and functions identically regardless of terminal orientation, making it ideal for AC-coupled or floating signal paths such as CAN bus lines or differential sensor outputs.
Is SMBG48CA-E3/5B compatible with lead-free reflow processes?
Yes, SMBG48CA-E3/5B meets J-STD-020 MSL Level 1 and is rated for a maximum lead-free reflow peak temperature of 260 °C. Its matte tin-plated gull-wing leads are solderable per J-STD-002 and JESD 22-B102, and it passes JESD 201 Class 2 whisker testing - ensuring reliable assembly in standard Pb-free manufacturing lines without pre-baking.
What is the maximum clamping voltage of SMBG48CA-E3/5B under surge conditions?
The SMBG48CA-E3/5B has a maximum clamping voltage (VC) of 77.4 V at a peak pulse current (IPPM) of 7.8 A, tested with a 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and represents the upper limit of voltage seen by protected circuitry during a rated transient event - critical for verifying compatibility with downstream components' absolute maximum ratings.
How does SMBG48CA-E3/5B differ from SMBJ48CA in terms of automotive qualification?
SMBG48CA-E3/5B is explicitly AEC-Q101 qualified, whereas SMBJ48CA is not. This qualification includes extended stress testing (HTOL, TCT, ESD HBM ≥8 kV, CDM ≥1 kV) required for automotive under-hood and chassis applications. The SMBG48CA-E3/5B's qualification documentation, material categorization (per Vishay doc #99912), and production lot traceability meet OEM Tier-1 requirements that SMBJ48CA does not satisfy.
Can SMBG48CA-E3/5B be used to protect 48 V DC power rails?
Yes, SMBG48CA-E3/5B is specifically suited for 48 V DC rail protection, with a 48 V stand-off voltage (VWM) providing ~10% margin above nominal voltage and a 77.4 V clamping voltage that aligns with 80 V-rated downstream FETs and controllers. Its 600 W peak pulse rating handles ISO 7637-2 Pulse 5a load dump events, and its bidirectional nature accommodates reverse-polarity connection risks in field service scenarios.
SMBG48CA-E3/5B 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:
- -
- Bidirectional Channels:
- 1
- 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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG48CA-E3/5B FAQ
1.How can I place an order for SMBG48CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG48CA-E3/5B 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 SMBG48CA-E3/5B reliable?
The price and inventory of SMBG48CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG48CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG48CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG48CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG48CA-E3/5B?
SMBG48CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG48CA-E3/5B 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 SMBG48CA-E3/5B?
For technical support, including SMBG48CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG48CA-E3/5B requirements.
6.How does Aetrix verify that SMBG48CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG48CA-E3/5B 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 SMBG48CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG48CA-E3/5B?
All SMBG48CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG48CA-E3/5B, 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 SMBG48CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBG48CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG48CA-E3/5B Tags
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Diodes Incorporated
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