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Vishay General Semiconductor - Diodes Division SMBG51CA-E3/5B
- Part No.:
- SMBG51CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG51CA-E3/5B.pdf
- Description:
- TVS DIODE 51VWM 82.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,765
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Product details
Overview
SMBG51CA-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 sensitive electronics. It features a 51 V stand-off voltage (VWM), 6.4–7.25 V breakdown range (VBR), 600 W peak pulse power (10/1000 µs), <1.0 µA reverse leakage at VWM, and clamps to ≤82.4 V at 7.3 A peak pulse current - deployed on signal lines and power rails in automotive sensor units and industrial control interfaces.
For engineers reviewing the SMBG51CA-E3/5B datasheet, SMBG51CA-E3/5B pinout, SMBG51CA-E3/5B application, or SMBG51CA-E3/5B equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification for automotive use, low incremental surge resistance, 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 min/max (6.4–7.25 V) and clamping behavior (VC ≤ 82.4 V at IPPM = 7.3 A). Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMBG package provides MSL Level 1 moisture sensitivity and 260 °C lead-free reflow compatibility.
The device meets UL 497B recognition (QVGQ2) and is rated for -55 °C to +150 °C operating junction temperature. Thermal resistance is RθJA = 100 °C/W (on 0.2" × 0.2" pads) and RθJL = 20 °C/W, enabling reliable surge dissipation in compact layouts without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - maximum continuous reverse working voltage before clamping begins |
| VBR (min/max) | 6.4 V / 7.25 V at 1 mA - guaranteed symmetrical breakdown threshold in both directions |
| VC @ IPPM | ≤82.4 V at 7.3 A - clamping voltage limits downstream IC stress during 10/1000 µs transients |
| PPPM | 600 W - peak pulse power handling per single 10/1000 µs waveform at 0.01% duty cycle |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity and battery life in high-impedance circuits |
| TJ max | +150 °C - enables operation in under-hood automotive and industrial environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (1 & 2) | Reversible transient conduction path | Identical electrical behavior in either direction; connects across protected line and ground or differential pair |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, data buses, and ungrounded lines without polarity concerns |
| 600 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when properly laid out |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensors, and infotainment interfaces |
| MSL Level 1, 260 °C compatible | Supports standard lead-free reflow profiles without preconditioning or baking |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage across temperature and lifetime |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine compartments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor signal line and chassis ground to clamp transients before they reach ADC input or signal conditioner. Use Value: Prevents sensor signal corruption and microcontroller reset events caused by >100 V spikes, leveraging SMBG51CA-E3/5B's 82.4 V clamping and AEC-Q101 reliability. | Use Scenario: Safeguarding CAN_H and CAN_L differential pair against ESD and inductive switching noise in factory automation controllers. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS connected across CAN bus lines to absorb ±8 kV contact ESD (IEC 61000-4-2) without distorting 1 Mbps signaling. Use Value: Maintains CAN signal integrity with <1.0 µA leakage and symmetrical clamping, avoiding false dominant states or bit errors during transient events. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side DC input protection for USB-C PD adapters subjected to lightning-induced surges on 5–20 V rails. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after primary DC-DC stage to limit voltage excursions on 51 V-rated intermediate bus before buck converter input. Use Value: SMBG51CA-E3/5B's 51 V VWM allows safe operation near nominal rail while clamping to 82.4 V - well below typical 100 V MOSFET drain ratings. | Use Scenario: Front-end protection of Ethernet PHY or xDSL line drivers interfacing with outside plant wiring vulnerable to induced lightning surges. IC Role / Device Role / Timing Role: Bidirectional TVS installed between line transformer secondary and PHY IC to shunt common-mode transients before signal conditioning circuitry. Use Value: 600 W rating and 7.3 A IPPM capability enable compliance with GR-1089-CORE Level 3 (10/1000 µs, 100 A) when used with series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating), different package (SMB vs SMBG); slightly larger footprint (4.58 mm × 3.94 mm vs 4.57 mm × 3.94 mm). | Not AEC-Q101 qualified; intended for commercial/industrial use only. | Select SMBJ51CA only if automotive qualification is unnecessary and existing SMB footprint is preferred. |
| SMCJ51CA | Higher PPPM = 1500 W, same VWM/VBR, larger SMC (DO-214AB) package; higher thermal mass but requires more PCB area. | Used where higher surge margin is required (e.g., outdoor telecom cabinets), not space-constrained designs. | Choose SMCJ51CA when system-level surge testing exceeds IEC 61000-4-5 Level 4 and layout allows larger footprint. |
Compared with SMBJ51CA and SMCJ51CA, SMBG51CA-E3/5B uniquely combines AEC-Q101 qualification, SMBG's low-profile geometry (1.75 mm height), and 600 W capability - making it optimal for automotive and space-limited industrial modules where reliability and miniaturization are jointly critical.
Availability
SMBG51CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer power adapter inputs, and telecom line card protection requiring stable component supply and full traceability.
Supply support for SMBG51CA-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 reliability, efficiency, and application-specific performance.
The SMBG TRANSZORB® series was developed for high-reliability surface-mount transient suppression in automotive and industrial systems, prioritizing AEC-Q101 compliance, low-profile packaging, and repeatable clamping behavior under repetitive surge stress.
FAQ
What is the clamping voltage of SMBG51CA-E3/5B at its rated peak pulse current?
The SMBG51CA-E3/5B clamps to a maximum of 82.4 V at its specified peak pulse current of 7.3 A under a 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 surge events - critical for ensuring downstream components like microcontrollers or transceivers remain within absolute maximum ratings. The SMBG51CA-E3/5B achieves this with low incremental surge resistance and symmetrical bidirectional behavior.
Is SMBG51CA-E3/5B suitable for automotive applications?
Yes, SMBG51CA-E3/5B is AEC-Q101 qualified, as confirmed in the Vishay datasheet (document 88456, page 3, footnote 1). It has undergone stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC standards, making it suitable for under-hood and cabin applications such as engine control sensors, ADAS camera modules, and body electronics. The SMBG51CA-E3/5B also meets UL 497B recognition and operates up to +150 °C junction temperature.
How does the SMBG51CA-E3/5B differ from unidirectional variants like SMBG51A-E3/5B?
The SMBG51CA-E3/5B is bidirectional, meaning it clamps symmetrically for both positive and negative transients, with identical VBR (6.4–7.25 V) and VC in either polarity. In contrast, SMBG51A-E3/5B is unidirectional, featuring a cathode band marking and conducting only in reverse bias - requiring correct orientation on PCB. The "CA" suffix explicitly denotes bidirectional function, and the SMBG51CA-E3/5B has no polarity marking, simplifying layout for AC-coupled or floating lines.
What is the maximum reverse leakage current for SMBG51CA-E3/5B at its stand-off voltage?
The SMBG51CA-E3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 51 V stand-off voltage (VWM), as specified in the Electrical Characteristics table (page 2 of Vishay document 88456). This ultra-low leakage minimizes power loss in battery-powered systems and prevents signal distortion in high-impedance analog paths. The SMBG51CA-E3/5B maintains this specification across its full operating temperature range (-55 °C to +150 °C), supporting precision sensing applications.
What packaging and reel configuration does SMBG51CA-E3/5B ship in?
SMBG51CA-E3/5B ships in 13-inch diameter plastic tape and reel format with a base quantity of 3200 units per reel, indicated by the "5B" package code in the ordering part number. The "E3" suffix confirms RoHS-compliant, industrial-grade matte tin plating meeting J-STD-002 and JESD 22-B102 solderability standards. This configuration supports high-volume automated SMT assembly and is compatible with standard pick-and-place equipment calibrated for SMBG (DO-215AA) devices.
SMBG51CA-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):
- 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-E3/5B FAQ
1.How can I place an order for SMBG51CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG51CA-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 SMBG51CA-E3/5B reliable?
The price and inventory of SMBG51CA-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 SMBG51CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG51CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG51CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG51CA-E3/5B?
SMBG51CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG51CA-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 SMBG51CA-E3/5B?
For technical support, including SMBG51CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG51CA-E3/5B requirements.
6.How does Aetrix verify that SMBG51CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG51CA-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 SMBG51CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG51CA-E3/5B?
All SMBG51CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG51CA-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 SMBG51CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBG51CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG51CA-E3/5B Tags
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