My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBG51CA-E3/52
- Part No.:
- SMBG51CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG51CA-E3/52.pdf
- Description:
- TVS DIODE 51VWM 82.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,008
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBG51CA-E3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMBG (DO-215AA) package, designed for robust overvoltage protection on signal and power lines. It features a 51 V stand-off voltage (VWM), 56.7–62.7 V breakdown voltage (VBR) at 1 mA, 82.4 V maximum clamping voltage (VC) at 7.3 A peak pulse current, and 600 W peak pulse power rating with a 10/1000 μs waveform.
For engineers reviewing the SMBG51CA-E3/52 datasheet, SMBG51CA-E3/52 pinout, SMBG51CA-E3/52 application, or SMBG51CA-E3/52 equivalent, this device is selected for automotive-grade ESD and surge protection where bidirectional clamping, AEC-Q101 qualification, low leakage (<1.0 μA at VWM), and stable junction temperature operation up to +150 °C are required.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering identical clamping performance regardless of transient polarity-critical for AC-coupled or floating interfaces. Its glass-passivated junction ensures stable VBR tolerance (±5 %), low incremental surge resistance, and fast response time (<1 ns) to transients induced by inductive switching or ESD events.
The SMBG51CA-E3/52 is rated for 600 W peak pulse power under 10/1000 μs waveform at 0.01 % duty cycle, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation on standard 5.0 mm × 5.0 mm copper pads without active cooling in industrial and automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 56.7 V / 62.7 V at 1 mA - Confirmed breakdown threshold ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 82.4 V at 7.3 A - Clamped voltage level limiting downstream stress; enables IC-level protection per IEC 61000-4-5 Level 4. |
| PPPM | 600 W - Peak pulse power handling capability with 10/1000 μs waveform; supports repetitive surge immunity in harsh environments. |
| ID @ VWM | <1.0 μA - Ultra-low reverse leakage preserves signal integrity and battery life in always-on sensor or communication circuits. |
| TJ max | +150 °C - Maximum junction temperature rating confirming suitability for under-hood automotive and high-temperature industrial use. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking; case meets UL 94 V-0 flammability rating and JEDEC-compliant solderability (J-STD-002/JESD 22-B102).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical bidirectional clamping behavior; either terminal serves as input/output-no orientation dependency in PCB layout. |
| Case (cathode band absent) | Thermal and mechanical interface | Exposed metal slug provides low RθJL = 20 °C/W path to PCB copper; requires minimum 5.0 mm × 5.0 mm pad per terminal for rated power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses (e.g., CAN, RS-485), and floating sensors without polarity concerns. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules subject to extended temperature cycling and humidity exposure. |
| Glass-passivated junction | Ensures ±5 % VBR tolerance and long-term stability against moisture ingress and thermal drift over 15-year service life. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow assembly without preconditioning; compatible with standard SMT production lines and automated optical inspection. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges (e.g., 4 kV line-earth) while maintaining sub-83 V clamping across full operating temperature range. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load-dump and jump-start transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed between LIN line and ground, clamping transients within nanoseconds to prevent latch-up or gate oxide damage. Use Value: Maintains signal integrity below 82.4 V during 400 V/10 ms load-dump events, eliminating need for additional series impedance or filtering components. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLCs from ESD and relay-coil flyback spikes. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA) TVS shunting transients directly at sensor connector, preserving 16-bit ADC accuracy and zero-drift calibration. Use Value: Prevents sensor output saturation during 8 kV contact ESD events while adding <0.5 pF capacitance-no bandwidth degradation on 10 kHz signals. |
| Telecom Data Line Surge Suppression | Consumer USB Port ESD Protection |
|
Use Scenario: Safeguarding Ethernet PHY magnetics and PoE injectors against lightning-induced surges on outdoor telecom links. IC Role / Device Role / Timing Role: Primary-level TVS mounted upstream of common-mode chokes, absorbing >500 W surge energy before secondary protection stages activate. Use Value: Survives repeated 10/1000 μs surges up to 600 W without parameter shift, extending field-replaceable unit lifetime beyond 10 years. |
Use Scenario: Integrated ESD clamp on USB 2.0 D+/D− lines in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Fast-response (sub-1 ns), low-capacitance TVS placed adjacent to USB connector to divert IEC 61000-4-2 ±15 kV air discharge pulses. Use Value: Limits voltage excursion to ≤82.4 V during ESD event, preventing data corruption and ensuring USB enumeration remains functional after 10,000+ discharges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA-E3/52 | Same VWM/VC, but lower PPPM = 600 W (same rating) and higher IPPM = 7.5 A; identical SMB (DO-214AA) footprint but 0.09 mm taller case height. | Suitable for space-constrained layouts where DO-214AA is already standardized; not AEC-Q101 qualified. | Select SMBJ51CA-E3/52 only if AEC-Q101 compliance is unnecessary and existing PCB land pattern matches SMB-not SMBG. |
| SMCJ51CA-E3/52 | Same VWM/VC, but higher PPPM = 1500 W and larger SMC (DO-214AB) package; RθJA = 40 °C/W vs. 100 °C/W for SMBG51CA-E3/52. | Used where sustained surge energy exceeds 600 W or ambient temperatures exceed 105 °C; requires larger PCB area and thermal relief. | Choose SMCJ51CA-E3/52 when protecting high-power DC inputs (e.g., 24 V industrial drives) needing >1 kW surge margin and enhanced thermal derating. |
Compared with SMBJ51CA-E3/52 and SMCJ51CA-E3/52, the SMBG51CA-E3/52 uniquely balances AEC-Q101 qualification, compact DO-215AA footprint, and 600 W capability-making it optimal for automotive and space-limited industrial designs requiring certified reliability without board redesign.
Availability
SMBG51CA-E3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom surge protection, and consumer USB port hardening requiring stable component supply across multi-year production cycles.
Supply support for SMBG51CA-E3/52 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMBG series was engineered specifically for AEC-Q101-compliant transient suppression in space-constrained automotive and industrial applications-prioritizing low-profile packaging, repeatable clamping, and extended thermal endurance.
FAQ
What is the clamping voltage of SMBG51CA-E3/52 at its rated peak pulse current?
The SMBG51CA-E3/52 has a maximum clamping voltage (VC) of 82.4 V at 7.3 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry sees no more than 82.4 V during worst-case surge events-critical for safeguarding 5 V or 3.3 V logic interfaces. The SMBG51CA-E3/52 maintains this clamping performance across its full -55 °C to +150 °C operating junction temperature range.
Is SMBG51CA-E3/52 suitable for automotive applications?
Yes, SMBG51CA-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. It passes high-temperature operating life (HTOL), temperature cycling (TCT), and ESD testing per automotive standards. Its 150 °C maximum junction temperature, low leakage (<1.0 μA), and bidirectional symmetry make SMBG51CA-E3/52 ideal for protecting LIN, CAN FD, and sensor signal lines in modern vehicles-confirmed in Vishay's qualification report #88456.
How does the SMBG51CA-E3/52 differ from unidirectional TVS diodes like SMBG51A-E3/52?
The SMBG51CA-E3/52 is bidirectional, meaning it clamps voltage transients of either polarity symmetrically-essential for AC-coupled or floating lines. In contrast, SMBG51A-E3/52 is unidirectional and conducts only in reverse bias, requiring correct cathode orientation and offering no protection against positive-going transients on grounded lines. The "CA" suffix in SMBG51CA-E3/52 denotes bidirectional functionality, verified in the Electrical Characteristics table of document 88456.
What is the thermal resistance of SMBG51CA-E3/52, and how does it affect PCB layout?
The SMBG51CA-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. This means effective heat dissipation requires adherence to the recommended pad layout in the datasheet-undersized pads cause thermal derating and premature failure during repetitive surges. The SMBG51CA-E3/52 must not be used on minimal traces or non-thermal land patterns.
Does SMBG51CA-E3/52 have polarity markings, and how is it oriented on the PCB?
No, SMBG51CA-E3/52 has no polarity markings because it is a bidirectional device-the anode and cathode terminals are functionally identical. There is no cathode band or other visual indicator on the SMBG (DO-215AA) package. This allows unrestricted placement on the PCB: either end may connect to the protected line or ground, simplifying layout and eliminating orientation errors during automated assembly. The SMBG51CA-E3/52 functions identically regardless of mounting direction.
SMBG51CA-E3/52 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 7.3A
- 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)
SMBG51CA-E3/52 FAQ
1.How can I place an order for SMBG51CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG51CA-E3/52 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 SMBG51CA-E3/52 reliable?
The price and inventory of SMBG51CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG51CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG51CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG51CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG51CA-E3/52?
SMBG51CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG51CA-E3/52 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 SMBG51CA-E3/52?
For technical support, including SMBG51CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG51CA-E3/52 requirements.
6.How does Aetrix verify that SMBG51CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG51CA-E3/52 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 SMBG51CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG51CA-E3/52?
All SMBG51CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG51CA-E3/52, 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 SMBG51CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBG51CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG51CA-E3/52 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 …
