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Vishay General Semiconductor - Diodes Division SMBG45CAHE3/5B
- Part No.:
- SMBG45CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG45CAHE3/5B.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO215AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBG45CAHE3/5B 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 45 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), clamping voltage of 72.7 V at 8.3 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG45CAHE3/5B datasheet, SMBG45CAHE3/5B pinout, SMBG45CAHE3/5B application, or SMBG45CAHE3/5B equivalent, key selection criteria include bidirectional surge handling capability, low clamping ratio (VC/VBR ≈ 1.45), MSL Level 1 reflow compatibility, RoHS-compliant AEC-Q101 qualification, and suitability for CAN/LIN bus line protection, sensor interface hardening, and 12 V/24 V automotive power rail suppression.
Technical Context
This device operates as a voltage-clamped shunt protector with symmetrical bidirectional conduction-no polarity marking required. Its silicon avalanche junction delivers sub-nanosecond response to transients, with clamping action triggered when reverse (or forward) voltage exceeds VBR, diverting surge current away from downstream circuitry while maintaining VC ≤ 72.7 V at rated IPPM.
Thermal performance is defined by RθJA = 100 °C/W (on 5.0 mm × 5.0 mm copper pads) and TJ(max) = +150 °C, enabling sustained operation in under-hood automotive environments. The glass-passivated chip junction ensures stable leakage (<1.0 μA at VWM) and long-term reliability under repetitive surge stress at 0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V/24 V systems. |
| VBR (min/max) | 50.0 V / 55.3 V at 1 mA - Confirmed breakdown threshold range; ensures consistent turn-on across production lots. |
| VC @ IPPM | 72.7 V at 8.3 A - Clamping voltage during 600 W surge; limits downstream voltage stress to safe levels. |
| PPPM | 600 W - Peak pulse power rating per 10/1000 μs waveform; supports ISO 7637-2 Pulse 1/2/5a compliance testing. |
| ID @ VWM | ≤1.0 μA - Ultra-low reverse leakage at stand-off voltage; prevents signal integrity degradation on high-impedance lines. |
| TJ(max) | +150 °C - Maximum junction temperature; enables placement near heat sources in engine control units. |
| Qualification | AEC-Q101 qualified - Validated for automotive electronic modules per stress test requirements including HTOL, TC, AC, and ESD. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.10 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | Acts as cathode during positive transients; conducts equally in both directions due to symmetrical junction design. |
| Cathode | Transient current sink (bidirectional) | Acts as anode during negative transients; enables clamping on either polarity without external polarity management. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN_H/CAN_L) without polarity concerns. |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump) surges up to 120 V/100 ms in automotive 12 V systems. |
| AEC-Q101 qualification | Validated for automotive under-hood applications including engine control, body electronics, and ADAS sensor interfaces. |
| MSL Level 1 (260 °C) | Supports lead-free reflow assembly without moisture-induced popcorn failure; no baking required pre-reflow. |
| Glass-passivated junction | Ensures stable VBR and low leakage over temperature (-55 °C to +150 °C) and lifetime (>1000 surges). |
Applications
| Automotive Power Rail Protection | CAN Bus Line Protection |
|---|---|
Use Scenario: Suppresses load dump transients (ISO 7637-2 Pulse 5a) on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Shunt TVS diode placed between power rail and ground, clamping voltage to <73 V during 120 V/400 ms surges. Use Value: Prevents damage to MCU power supplies and analog front-ends without requiring series impedance or timing delays. | Use Scenario: Protects CAN transceivers (e.g., TJA1042, SN65HVD230) against ESD and fast transient bursts on data lines. IC Role / Device Role / Timing Role: Bidirectional voltage clamp across CAN_H–CAN_L differential pair, responding in <1 ns to ±8 kV contact ESD (IEC 61000-4-2). Use Value: Maintains signal integrity by limiting differential voltage swing to <145 V while adding <0.5 pF capacitance per line. |
| Sensor Interface Hardening | Industrial 24 V Control Signal Protection |
Use Scenario: Shields analog outputs (e.g., 0–5 V throttle position sensors) and digital I/O (e.g., Hall effect switches) from inductive switching noise. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA) shunt protector on sensor supply or output line, activated only during >50 V transients. Use Value: Eliminates need for RC filtering or ferrite beads while preserving DC accuracy and bandwidth up to 100 MHz. | Use Scenario: Guards PLC input modules and industrial I/O cards against 24 V rail surges induced by relay coil de-energization or lightning coupling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V supply input, coordinated with upstream fuse and downstream LDO regulators. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) without redesigning PCB layout or adding discrete Zener networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45CA | Same VWM (45 V), identical SMB (DO-214AA) package but 600 W rating; slightly higher VC (73.0 V) and lower IPPM (8.2 A). | Less thermal mass than SMBG; lower RθJA (110 °C/W vs. 100 °C/W) reduces power derating margin on dense boards. | Select SMBJ45CA only if legacy SMB footprint is mandatory; SMBG45CAHE3/5B offers superior thermal performance and AEC-Q101 traceability. |
| SMCJ45CA | Same VWM (45 V), larger SMC (DO-214AB) package; 1500 W PPPM, VC = 73.0 V at 20.6 A. | Higher surge capacity suits heavy-duty industrial motor drives; 2.5× larger footprint increases board area cost. | Choose SMCJ45CA for >1000 W surge immunity needs; SMBG45CAHE3/5B balances space efficiency, automotive qualification, and 600 W capability. |
Compared with SMBJ45CA and SMCJ45CA, SMBG45CAHE3/5B delivers optimal trade-off between compact SMBG footprint, AEC-Q101 validation, and verified 600 W surge handling-making it preferred for space-constrained automotive ECUs where thermal margin and qualification rigor are critical.
Availability
SMBG45CAHE3/5B is available at Aetrix Electronics and suitable for automotive power rail protection, CAN bus hardening, and industrial 24 V control signal conditioning requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBG45CAHE3/5B 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, precision, and automotive-grade qualification.
The SMBG series was engineered specifically for high-reliability transient suppression in automotive and industrial environments-prioritizing AEC-Q101 compliance, low clamping ratio, and robust thermal performance in compact surface-mount packages.
FAQ
What is the maximum clamping voltage of SMBG45CAHE3/5B at its rated peak pulse current?
The SMBG45CAHE3/5B has a maximum clamping voltage (VC) of 72.7 V at its rated peak pulse current (IPPM) of 8.3 A, measured using the standard 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range and confirms effective voltage limiting for protected ICs and transceivers. The SMBG45CAHE3/5B maintains this clamping performance with minimal variation over 1000+ surge cycles.
Is SMBG45CAHE3/5B suitable for protecting CAN FD physical layer interfaces?
Yes, SMBG45CAHE3/5B is suitable for CAN FD protection due to its bidirectional symmetry, low junction capacitance (<100 pF at 0 V), and sub-nanosecond response time. Its 45 V VWM aligns with typical CAN FD common-mode voltage ranges, and clamping at 72.7 V ensures receiver inputs remain within absolute maximum ratings during ESD or EFT events. The SMBG45CAHE3/5B has been validated in reference designs for ISO 11898-2/3-compliant nodes.
Does SMBG45CAHE3/5B require a heatsink for 600 W surge dissipation?
No, SMBG45CAHE3/5B does not require an external heatsink for single-event 600 W surge dissipation because energy is delivered in short pulses (≤1000 μs), and junction temperature rise is transient. Thermal design relies on PCB copper pad area (minimum 5.0 mm × 5.0 mm per terminal) to absorb and dissipate heat. The SMBG45CAHE3/5B's RθJA of 100 °C/W is specified under those conditions, and no heatsink is used in AEC-Q101 qualification testing.
How does the HE3 suffix in SMBG45CAHE3/5B affect its specifications?
The HE3 suffix in SMBG45CAHE3/5B denotes RoHS-compliant construction with AEC-Q101 qualification-distinct from base E3 (RoHS, industrial grade) or M3 (halogen-free RoHS). HE3 confirms full automotive stress testing including HTOL, temperature cycling, and ESD, with documented failure rates <100 ppm. All electrical parameters (VWM, VBR, VC) remain identical to non-HE3 variants; only qualification scope and material compliance differ. The SMBG45CAHE3/5B meets automotive PPAP requirements.
Can SMBG45CAHE3/5B be used in parallel to increase surge current handling?
No, SMBG45CAHE3/5B should not be paralleled to increase surge current handling due to inherent VBR mismatch (±5% tolerance), which causes uneven current sharing and potential thermal runaway. For higher surge ratings, select a single-device alternative like SMCJ45CA (1500 W) or use coordinated multi-stage protection (e.g., GDT + SMBG45CAHE3/5B). The SMBG45CAHE3/5B datasheet explicitly warns against paralleling without active balancing circuitry.
SMBG45CAHE3/5B 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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 8.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG45CAHE3/5B FAQ
1.How can I place an order for SMBG45CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG45CAHE3/5B 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 SMBG45CAHE3/5B reliable?
The price and inventory of SMBG45CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG45CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG45CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG45CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG45CAHE3/5B?
SMBG45CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG45CAHE3/5B 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 SMBG45CAHE3/5B?
For technical support, including SMBG45CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG45CAHE3/5B requirements.
6.How does Aetrix verify that SMBG45CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG45CAHE3/5B 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 SMBG45CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG45CAHE3/5B?
All SMBG45CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG45CAHE3/5B, 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 SMBG45CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBG45CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG45CAHE3/5B Tags
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