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Vishay General Semiconductor - Diodes Division SMBG45HE3/5B
- Part No.:
- SMBG45HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG45HE3/5B.pdf
- Description:
- TVS DIODE 45VWM 80.3VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,342
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Product details
Overview
SMBG45HE3/5B from Vishay General Semiconductor is a uni-directional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) 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, 72.7 V clamping voltage (VC) at 8.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMBG45HE3/5B datasheet, SMBG45HE3/5B pinout, SMBG45HE3/5B application, or SMBG45HE3/5B equivalent, key selection criteria include its AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and RoHS-compliant matte tin-plated leads meeting J-STD-002 solderability standards.
Technical Context
This TVS diode operates as a uni-directional clamping device, leveraging a glass-passivated silicon junction to deliver fast response (<1 ps) and stable clamping under repetitive transients. Its electrical characteristics are specified at 25 °C with derating above TA = 25 °C per Fig. 2, and thermal resistance is 100 °C/W (junction-to-ambient) on 0.2" × 0.2" copper pads.
The SMBG45HE3/5B is rated for 100 A non-repetitive forward surge current (8.3 ms half-sine), supports ≤0.01% duty cycle operation, and meets UL 94 V-0 flammability requirements in its DO-215AA molding compound - enabling use in high-reliability automotive and industrial environments where transient immunity and long-term stability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 50.0 V / 55.3 V at 1 mA - ensures reliable turn-on within defined tolerance band during overvoltage events |
| VC @ IPPM | 72.7 V at 8.3 A - limits downstream voltage stress to safe levels during 10/1000 µs surges |
| PPPM | 600 W - peak pulse power handling capability under standardized surge waveform |
| IFSM | 100 A - withstands single 8.3 ms half-sine surge without degradation |
| TJ max | +150 °C - enables operation in under-hood automotive and high-temperature industrial enclosures |
| Leakage @ VWM | 1.0 µA - negligible standby current draw, preserving system power budget |
Pinout & Package
DO-215AA (SMBG) surface-mount package with gull-wing leads; cathode indicated by band on one end; terminals are matte tin plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in uni-directional configuration |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 45 V rail or signal trace); conducts only during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without preconditioning |
| 600 W 10/1000 µs rating | Provides robust protection against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surges |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during clamping, reducing risk to downstream ICs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 45 V battery-fed control modules (e.g., body control units) from load dump and alternator transients. IC Role / Device Role / Timing Role: Uni-directional TVS placed between supply rail and chassis ground to clamp positive-going surges. Use Value: Limits voltage to ≤72.7 V during 8.3 A transients, preventing damage to 48 V-rated microcontrollers and CAN transceivers. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) in factory-floor pressure sensors from ESD and switching noise. IC Role / Device Role / Timing Role: Clamping device connected across signal and return, referenced to local ground plane. Use Value: Sub-1 ns response ensures suppression before sensitive op-amps or ADC inputs saturate or latch up. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered network switches' 48 V input stage against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input before DC/DC converter and hot-swap controller. Use Value: 600 W rating handles multiple repetitions of IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs) without parametric shift. | Use Scenario: Protecting MCU GPIOs and gate drivers in smart washing machine motor controllers from inductive kickback. IC Role / Device Role / Timing Role: Snubber-connected TVS across relay coils or MOSFET drain-source nodes. Use Value: 100 A IFSM rating absorbs energy from 24 V/5 A solenoid de-energization without failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45AHE3/5B | Same VWM (45 V), identical DO-215AB (SMBJ) package but slightly higher VC (73.5 V) and lower IPPM (8.0 A) | Lower peak pulse current handling; marginally less robust under extreme 10/1000 µs surges | Select SMBG45HE3/5B when higher surge current margin (8.3 A vs. 8.0 A) and tighter VC spec are required. |
| 1.5SMC47AHE3/A | Higher VWM (47 V), larger DO-214AB (SMC) package, same 600 W rating but 100 °C/W RθJA on larger pad layout | Requires more PCB area; better thermal dissipation only with ≥0.5" × 0.5" copper pads | Choose SMBG45HE3/5B for space-constrained layouts where DO-215AA footprint (2.3 mm × 3.6 mm) is mandatory. |
Compared with SMBJ45AHE3/5B and 1.5SMC47AHE3/A, the SMBG45HE3/5B offers optimal balance of compact DO-215AA size, AEC-Q101 qualification, and precise 45 V clamping performance - making it preferred for automotive and high-density industrial designs where board space and qualification compliance are jointly critical.
Availability
SMBG45HE3/5B is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power input stages requiring stable component supply, AEC-Q101 validation, and consistent 45 V clamping behavior across production lots.
Supply support for SMBG45HE3/5B 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 is engineered specifically for high-energy transient suppression in space-constrained, high-reliability applications - combining AEC-Q101 qualification, low-profile DO-215AA packaging, and tightly controlled clamping parameters for automotive and industrial systems.
FAQ
What is the clamping voltage of SMBG45HE3/5B at its rated peak pulse current?
The SMBG45HE3/5B has a maximum clamping voltage (VC) of 72.7 V at 8.3 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and ensures predictable voltage limiting during surge events. The SMBG45HE3/5B maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMBG45HE3/5B qualified for automotive applications?
Yes, the SMBG45HE3/5B carries the HE3 suffix, which denotes AEC-Q101 qualification per Vishay's ordering nomenclature. It has passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22, confirming suitability for under-hood and chassis-mounted automotive electronics. The SMBG45HE3/5B is explicitly listed in Vishay's AEC-Q101 qualified product matrix.
What does the "5B" in SMBG45HE3/5B indicate?
The "5B" suffix in SMBG45HE3/5B specifies the packaging format: 13-inch diameter plastic tape and reel, containing 3200 units per reel. This differs from "52", which denotes 7-inch reels of 750 units. Both share identical electrical and thermal specifications; the "5B" variant is optimized for high-volume SMT assembly lines requiring extended reel life and reduced changeover frequency. The SMBG45HE3/5B uses the same DO-215AA (SMBG) package as all variants in the family.
How does SMBG45HE3/5B differ from bi-directional TVS diodes like SMBG45CA?
The SMBG45HE3/5B is a uni-directional TVS diode, meaning it clamps only positive-going transients relative to its cathode connection - ideal for DC power rail protection. In contrast, SMBG45CA is bi-directional and clamps both polarities, suited for AC lines or data buses. The SMBG45HE3/5B exhibits lower leakage (<1.0 µA at VWM) and higher IFSM (100 A) than its bi-directional counterpart, which trades off some surge capacity for dual-polarity operation.
What is the thermal resistance of SMBG45HE3/5B, and how does it affect layout design?
The SMBG45HE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal copper area; increasing pad size or adding thermal vias reduces RθJA and improves surge survivability. Layouts must maintain this minimum pad area to ensure the SMBG45HE3/5B meets its 150 °C TJ rating during repetitive 600 W pulses.
SMBG45HE3/5B 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 80.3V
- Current - Peak Pulse (10/1000µs):
- 7.5A
- 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)
SMBG45HE3/5B FAQ
1.How can I place an order for SMBG45HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG45HE3/5B 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 SMBG45HE3/5B reliable?
The price and inventory of SMBG45HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG45HE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG45HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG45HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG45HE3/5B?
SMBG45HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG45HE3/5B 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 SMBG45HE3/5B?
For technical support, including SMBG45HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG45HE3/5B requirements.
6.How does Aetrix verify that SMBG45HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG45HE3/5B 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 SMBG45HE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG45HE3/5B?
All SMBG45HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG45HE3/5B, 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 SMBG45HE3/5B part is unused and in its original packaging.
Return procedure for SMBG45HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG45HE3/5B Tags
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