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Vishay General Semiconductor - Diodes Division SMBG33C-E3/5B
- Part No.:
- SMBG33C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG33C-E3/5B.pdf
- Description:
- TVS DIODE 33VWM 59VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,176
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Product details
Overview
SMBG33C-E3/5B from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) package, designed for clamping voltage transients on signal or power lines. It features 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), <1 µA reverse leakage at VWM, and clamps to ≤53.3 V at 11.3 A peak surge current - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMBG33C-E3/5B datasheet, SMBG33C-E3/5B pinout, SMBG33C-E3/5B application, or SMBG33C-E3/5B equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, 150 °C max junction temperature, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with identical VBR min/max (36.7 V / 40.6 V), ID ≤1.0 µA at VWM = 33 V, and VC = 53.3 V at IPPM = 11.3 A under 10/1000 µs waveform. Its glass-passivated junction ensures stable avalanche performance and low incremental surge resistance.
Thermal design relies on RθJA = 100 °C/W (on recommended pad layout) and RθJL = 20 °C/W, enabling reliable operation up to TJ = 150 °C. The device meets UL 94 V-0 flammability rating and is qualified to AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 36.7 V / 40.6 V at IT = 1 mA - defines guaranteed avalanche onset range for bidirectional conduction |
| VC @ IPPM | 53.3 V at 11.3 A - clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 600 W - peak transient power handling capacity under standardized surge waveform |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - enables use in under-hood automotive environments and industrial enclosures |
| MSL Level | Level 1 (per J-STD-020) - supports standard reflow without dry-pack or bake requirements |
Pinout & Package
DO-215AA (SMBG) surface-mount package with gull-wing leads; matte tin-plated terminals compliant with J-STD-020 and JESD 22-B102 solderability standards. Bi-directional construction has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical avalanche behavior in either direction; no cathode band marking required |
| Lead 1 / Lead 2 | Connection to PCB pads | Requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal for rated PPPM derating |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| 600 W peak pulse power (10/1000 µs) | Withstands repetitive surges up to 0.01% duty cycle without degradation |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term clamping consistency across temperature |
| MSL Level 1 | Enables direct placement into standard SMT reflow profiles without preconditioning |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for enclosed industrial and automotive assemblies |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in engine control units. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed directly at connector interface to shunt transients before reaching signal conditioning circuitry. Use Value: Limits induced voltage to ≤53.3 V during 10/1000 µs surges, preserving integrity of 3.3 V/5 V microcontrollers and ADC front-ends. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring transients from relay coils and motor drives. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on 24 V DC input channels, mounted adjacent to terminal block entry points. Use Value: Withstands 100 A surge current (IFSM) and maintains <1 µA leakage at 33 V, ensuring stable logic-level detection under normal operation. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding Ethernet PHYs and RS-485 transceivers in networked building automation devices from lightning-induced surges on unshielded cabling. IC Role / Device Role / Timing Role: First-stage protection device on differential data lines, coordinated with GDT or polymer PTC secondary stages. Use Value: Responds in <1 ns to clamp transients while maintaining <0.5 pF junction capacitance at zero bias, minimizing signal distortion. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Parallel-mounted across motor terminals to absorb inductive kickback energy during PWM switching. Use Value: Dissipates 600 W peak pulse energy without thermal runaway, extending MOSFET lifespan and reducing EMI emissions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA-E3/5B | Same VWM (33 V), identical DO-214AA (SMB) package but lower PPPM (600 W vs. SMBJ's 600 W - same rating), slightly higher VC (53.3 V vs. SMBJ33CA's 53.3 V - matched), different thermal resistance (RθJA = 100 °C/W vs. SMBJ's 100 °C/W) | Functionally interchangeable in most PCB layouts; SMBJ variant uses DO-214AA instead of DO-215AA, differing in lead pitch and body width | Select SMBG33C-E3/5B when DO-215AA footprint and AEC-Q101 qualification are mandatory; choose SMBJ33CA-E3/5B only if legacy SMB footprint is fixed |
| 1.5KE33CA | Higher PPPM (1500 W), axial-leaded DO-201AD package, slower response due to higher junction capacitance, not AEC-Q101 qualified | Intended for board-edge or chassis-level protection rather than SMT signal-line placement | Use only where space allows through-hole mounting and automotive qualification is not required |
Compared with SMBJ33CA-E3/5B and 1.5KE33CA, SMBG33C-E3/5B uniquely combines AEC-Q101 qualification, DO-215AA gull-wing geometry for fine-pitch SMT, and guaranteed bi-directional clamping symmetry - making it optimal for space-constrained automotive and industrial control modules requiring zero-marking polarity handling.
Availability
SMBG33C-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBG33C-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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade validation.
The SMBG series was engineered specifically for high-reliability surface-mount transient suppression in automotive and industrial environments, prioritizing AEC-Q101 compliance, low-profile packaging, and repeatable clamping performance.
FAQ
What does the "C" suffix in SMBG33C-E3/5B indicate?
The "C" in SMBG33C-E3/5B denotes bi-directional configuration, meaning the device provides symmetrical transient suppression in both forward and reverse polarities. Unlike uni-directional variants (e.g., SMBG33A), SMBG33C-E3/5B has no cathode marking and identical electrical characteristics in either direction - confirmed by VBR min/max values (36.7 V / 40.6 V) and ID ≤1.0 µA at VWM = 33 V in both directions per Vishay Document 88456.
Is SMBG33C-E3/5B RoHS-compliant and halogen-free?
Yes, SMBG33C-E3/5B is RoHS-compliant per Directive 2011/65/EU and halogen-free per JEDEC JS709A standards. The "E3" suffix explicitly indicates commercial-grade RoHS compliance, and Vishay documentation confirms all E3-suffix parts meet both requirements - verified in Vishay's Material Category Policy (Doc. 91000) and ordering information tables showing E3/5B packaging.
What is the maximum operating temperature for SMBG33C-E3/5B?
The SMBG33C-E3/5B has a maximum junction temperature (TJ max) of +150 °C, validated across its full operating range per Vishay Document 88456. This rating supports deployment in under-hood automotive locations and sealed industrial enclosures, with thermal derating curves provided in Figure 2 for ambient temperatures above 25 °C.
Does SMBG33C-E3/5B require special PCB layout considerations?
Yes - SMBG33C-E3/5B must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 600 W peak pulse power (10/1000 µs). Smaller pads cause thermal derating; Figure 1 and note (1) in Vishay Document 88456 specify this requirement to maintain RθJA = 100 °C/W and prevent premature failure during repetitive surges.
How does SMBG33C-E3/5B differ from SMBG33A-E3/5B?
SMBG33C-E3/5B is bi-directional with symmetrical clamping, while SMBG33A-E3/5B is uni-directional and features a cathode band marking. Key differences include polarity marking (absent in SMBG33C-E3/5B), forward voltage drop (VF = 3.5 V at 50 A for uni-directional only - not applicable to SMBG33C-E3/5B), and IFSM rating (100 A for SMBG33A, not defined for bi-directional SMBG33C-E3/5B per Doc. 88456).
SMBG33C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 59V
- Current - Peak Pulse (10/1000µs):
- 10.2A
- 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)
SMBG33C-E3/5B FAQ
1.How can I place an order for SMBG33C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG33C-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 SMBG33C-E3/5B reliable?
The price and inventory of SMBG33C-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 SMBG33C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG33C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG33C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG33C-E3/5B?
SMBG33C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG33C-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 SMBG33C-E3/5B?
For technical support, including SMBG33C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG33C-E3/5B requirements.
6.How does Aetrix verify that SMBG33C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG33C-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 SMBG33C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG33C-E3/5B?
All SMBG33C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG33C-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 SMBG33C-E3/5B part is unused and in its original packaging.
Return procedure for SMBG33C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG33C-E3/5B Tags
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