My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBG20CA-E3/5B
- Part No.:
- SMBG20CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG20CA-E3/5B.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,837
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBG20CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping voltage transients on signal and power lines. It features 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), 32.4 V maximum clamping voltage (VC) at 18.5 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMBG20CA-E3/5B datasheet, SMBG20CA-E3/5B pinout, SMBG20CA-E3/5B application, or SMBG20CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.45), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1.0 ns), critical for suppressing ESD and lightning-induced surges per IEC 61000-4-2 and IEC 61000-4-5.
The device delivers 18.5 A peak pulse current (IPPM) under 10/1000 μs waveform while maintaining low incremental surge resistance, and its thermal resistance (RθJA = 100 °C/W) supports operation up to +150 °C junction temperature when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating range for protected circuitry. |
| VBR (min/max) | 22.2 V / 24.5 V at 1 mA - Breakdown threshold range; ensures reliable turn-on during overvoltage events with tight tolerance. |
| VC @ IPPM | 32.4 V at 18.5 A - Clamped voltage seen by downstream components; limits stress on ICs and MOSFETs during surge. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform; supports robust protection against repetitive transients at 0.01% duty cycle. |
| IPPM | 18.5 A - Maximum non-repetitive surge current; determines minimum trace width and PCB copper area required for safe energy dissipation. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and industrial enclosures. |
| MSL Level | Level 1 (J-STD-020) - No floor life limitation; allows indefinite storage and standard reflow without baking. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Case meets UL 94 V-0 flammability rating; matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts surge current during negative voltage excursions; connects to line being protected. |
| Cathode | Transient current entry (positive half-cycle) | Conducts surge current during positive voltage excursions; connects to same line as Anode for bidirectional clamping. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces requiring high reliability under thermal cycling and vibration. |
| 600 W peak pulse power (10/1000 μs) | Supports suppression of severe transients such as load dump (ISO 7637-2) and coupled lightning surges (IEC 61000-4-5) without degradation. |
| Low clamping voltage (32.4 V @ 18.5 A) | Minimizes overvoltage stress on 24 V-rated components like CAN transceivers and microcontrollers in industrial and automotive systems. |
| MSL Level 1, 260 °C lead-free reflow compatible | Enables direct integration into high-volume SMT lines without moisture sensitivity concerns or pre-bake requirements. |
| Glass passivated junction | Ensures stable leakage current (<1.0 μA at 20 V), long-term parameter stability, and resistance to humidity-induced degradation. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensors and camera module data lines from ISO 7637-2 pulse 1, 2a, and 5a transients in 12 V/24 V vehicle electrical systems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential signal pair or supply rail to limit voltage excursion to safe levels during load dump or inductive switching. Use Value: Prevents latch-up or permanent damage to analog front-end ICs and serializer/deserializer chips by clamping transients to ≤32.4 V while maintaining signal integrity. |
Use Scenario: Safeguarding CAN FD transceivers (e.g., TCAN1042, SN65HVD256) on factory automation PLC backplanes exposed to relay coil flyback and ground bounce. IC Role / Device Role / Timing Role: Line-side TVS connected between CAN_H/CAN_L and ground to absorb common-mode surges and differential spikes without affecting bus timing or bit rate. Use Value: Enables reliable 5 Mbps CAN FD communication in noisy environments by limiting differential clamping to <35 V and preserving bus dominance timing margins. |
| Consumer USB Type-C Port | Telecom DSL Line Interface |
Use Scenario: Protecting USB Type-C CC and SBU pins in portable docking stations against ESD (±15 kV air, ±8 kV contact) per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed directly at connector to shunt ESD current before it reaches USB controller or level translators. Use Value: Maintains signal fidelity on high-speed sideband use (SBU) channels with minimal capacitive loading (<100 pF typical), avoiding jitter or eye closure. |
Use Scenario: Shielding ADSL/VDSL line drivers and SLIC circuits in residential gateways from induced surges on twisted-pair telephone lines per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Primary protection device bridging tip/ring lines to ground, absorbing longitudinal surges up to 1 kV/10/700 μs while surviving repeated events. Use Value: Extends service life of line interface ICs by limiting peak voltage to 32.4 V and dissipating 600 W pulses without parametric shift or catastrophic failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA-E3/52 | Same VWM (20 V), but lower PPPM (600 W vs. SMBJ's 600 W), identical VC (32.4 V), yet SMBJ package has higher RθJA (110 °C/W vs. SMBG's 100 °C/W). | Suitable for lower-power consumer electronics; less suited for sustained surge environments due to reduced thermal performance. | Select SMBG20CA-E3/5B when board space permits and thermal margin is critical; SMBJ20CA-E3/52 fits tighter layouts but requires derating above 70 °C ambient. |
| SMCJ20CAHE3/5B | Higher PPPM (1500 W), larger SMC (DO-214AB) package, same VWM/VBR, VC = 32.4 V, AEC-Q101 qualified, but 3× footprint area and 2.5× weight. | Better for high-energy threats (e.g., ISO 16750-2 long-duration surges); not suitable for dense routing or thin PCBs. | Choose SMBG20CA-E3/5B for space-constrained automotive modules; SMCJ20CAHE3/5B only where 1500 W rating is mandatory and layout allows larger footprint. |
Compared with SMBJ20CA-E3/52 and SMCJ20CAHE3/5B, SMBG20CA-E3/5B delivers optimal balance of surge robustness, thermal efficiency, and compactness-enabling AEC-Q101 compliance in tight automotive ECUs without sacrificing clamping performance or requiring PCB redesign.
Availability
SMBG20CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interface, and telecom DSL line interface requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBG20CA-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, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMBG series was developed specifically for space-constrained, thermally demanding automotive and industrial applications requiring AEC-Q101-compliant bidirectional TVS diodes in low-profile surface-mount packages.
FAQ
What is the clamping voltage of SMBG20CA-E3/5B at its rated peak pulse current?
The SMBG20CA-E3/5B exhibits a maximum clamping voltage (VC) of 32.4 V when subjected to its rated peak pulse current (IPPM) of 18.5 A 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 surge events. The SMBG20CA-E3/5B maintains this clamping performance across its specified operating temperature range.
Is SMBG20CA-E3/5B suitable for automotive applications?
Yes, SMBG20CA-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments with operating junction temperatures up to +150 °C. Its bidirectional architecture, low clamping ratio, and MSL Level 1 reflow compatibility make it appropriate for protecting ECUs, ADAS sensors, and infotainment interfaces. The SMBG20CA-E3/5B meets requirements for ISO 7637-2 and ISO 16750-2 transient immunity testing.
What does the "CA" suffix indicate in SMBG20CA-E3/5B?
The "CA" suffix in SMBG20CA-E3/5B denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBG20A), the SMBG20CA-E3/5B has no polarity marking and functions identically in either direction-critical for protecting AC-coupled signals, differential buses like CAN, or floating power rails where voltage polarity reversal may occur.
What is the thermal resistance of SMBG20CA-E3/5B, and how does it affect layout?
The SMBG20CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB construction and dictates minimum copper area needed to sustain repetitive surges without exceeding +150 °C junction temperature. Layouts must replicate this pad size and avoid thermal isolation to ensure SMBG20CA-E3/5B remains within safe operating limits.
How does SMBG20CA-E3/5B compare to unidirectional SMBG20A-E3/5B in terms of leakage and application scope?
SMBG20CA-E3/5B has identical VWM (20 V) and VBR (22.2–24.5 V) specs as SMBG20A-E3/5B but differs in leakage: SMBG20CA-E3/5B specifies ≤1.0 μA at VWM, whereas SMBG20A-E3/5B specifies ≤5.0 μA at VWM (forward direction). The SMBG20CA-E3/5B supports bidirectional signal paths (e.g., RS-485, CAN), while SMBG20A-E3/5B is limited to DC-biased or single-polarity rails. Both share the same SMBG package and 600 W rating.
SMBG20CA-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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 18.5A
- 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)
SMBG20CA-E3/5B FAQ
1.How can I place an order for SMBG20CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG20CA-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 SMBG20CA-E3/5B reliable?
The price and inventory of SMBG20CA-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 SMBG20CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG20CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG20CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG20CA-E3/5B?
SMBG20CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG20CA-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 SMBG20CA-E3/5B?
For technical support, including SMBG20CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG20CA-E3/5B requirements.
6.How does Aetrix verify that SMBG20CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG20CA-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 SMBG20CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG20CA-E3/5B?
All SMBG20CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG20CA-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 SMBG20CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBG20CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG20CA-E3/5B 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 …
