My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBG40HE3/5B
- Part No.:
- SMBG40HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG40HE3/5B.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,776
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBG40HE3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMBG package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 40 V standoff voltage (VWM), 44.4–49.1 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 64.5 V at 9.3 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG40HE3/5B datasheet, SMBG40HE3/5B pinout, SMBG40HE3/5B application, or SMBG40HE3/5B equivalent, this device is selected for high-energy surge suppression in automotive ECUs, industrial power supplies, and telecom interface circuits where stable clamping, low leakage (<1.0 µA at VWM), and MSL Level 1 reflow compatibility are critical.
Technical Context
The SMBG40HE3/5B operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its specified VBR range (44.4–49.1 V), then clamping transients to ≤64.5 V at 9.3 A. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns).
Thermal design is supported by RθJA = 100 °C/W (on 5.0 mm × 5.0 mm copper pads) and TJmax = 150 °C, with surge capability rated at 100 A (8.3 ms half-sine, IFSM). The HE3 suffix confirms AEC-Q101 qualification and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR @ IT = 1 mA | 44.4–49.1 V - Breakdown threshold range; ensures reliable turn-on during surges without premature leakage. |
| VC @ IPPM = 9.3 A | 64.5 V - Clamped voltage under 600 W 10/1000 µs surge; determines protected circuit's maximum stress level. |
| IPPM | 9.3 A - Peak pulse current at rated clamping voltage; validates energy-handling capacity for common lightning/surge standards. |
| ID @ VWM | <1.0 µA - Reverse leakage at 40 V; enables low-power system monitoring and minimal standby loss. |
| TJmax | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| Package | DO-215AA (SMBG) - Surface-mount gull-wing package with 5.0 mm × 5.0 mm thermal pad footprint; compatible with automated SMT assembly. |
Pinout & Package
DO-215AA (SMBG) package: gull-wing surface-mount outline with cathode band marking on one end; terminals are matte tin-plated for J-STD-002 solderability and JESD 22-B102 reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; carries full surge current during clamping. |
| Cathode | Protected line connection | Connected to the line being protected (e.g., 40 V supply rail); polarity band identifies this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD; supports Tier-1 ECU designs. |
| 600 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-earth) when properly mounted on 5.0 mm × 5.0 mm copper pads. |
| Glass-passivated junction | Ensures stable VBR tolerance and low parametric drift over temperature and lifetime; reduces risk of field failure due to moisture ingress. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning during assembly. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving protection margin for downstream ICs. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial 24/48 V DC Power Supply |
|---|---|
|
Use Scenario: Protection of microcontroller I/O and CAN transceiver power rails against load dump and alternator surge events. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 40 V supply and ground to clamp transients exceeding 44.4 V. Use Value: Limits voltage seen by MCU and CAN PHY to ≤64.5 V during 12 V system load dump (ISO 7637-2 Pulse 5a), preventing latch-up or permanent damage. |
Use Scenario: Input-stage surge protection for DIN-rail-mounted 48 V DC-DC converters used in factory automation. IC Role / Device Role / Timing Role: Primary overvoltage clamp on the 48 V input bus, upstream of bulk capacitors and primary-side controller. Use Value: Absorbs 600 W surges (IEC 61000-4-5) without degradation, maintaining converter uptime in electrically noisy plant environments. |
| Telecom Base Station Interface | Consumer Smart Meter Power Input |
|
Use Scenario: Protection of RS-485 transceivers and auxiliary 40 V bias rails against induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional-capable layout (though SMBG40HE3/5B is unidirectional) used in conjunction with series impedance to limit let-through energy. Use Value: Clamps 10/1000 µs surges to 64.5 V within nanoseconds, preserving signal integrity and preventing transceiver latch-up. |
Use Scenario: Overvoltage safeguard on the AC/DC adapter output feeding the meter's real-time clock and metrology IC. IC Role / Device Role / Timing Role: Standoff-rated TVS on the regulated 40 V auxiliary rail, guarding against capacitor failure or regulator fault conditions. Use Value: <1.0 µA leakage at 40 V prevents battery drain in backup-powered meters; AEC-Q101 grade ensures 10+ year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40AHE3/5B | Same DO-215AB (SMB) package, identical VWM/VBR/VC, but lower PPPM (400 W vs. 600 W); RθJA = 110 °C/W. | Limited to lower-energy surge environments (e.g., IEC 61000-4-5 Level 2); not recommended for automotive load dump. | Select SMBG40HE3/5B when 600 W rating and AEC-Q101 validation are required; SMBJ40AHE3/5B suits cost-sensitive non-automotive designs. |
| SMCJ40AHE3/5B | DO-214AB (SMC) package; same electrical specs but higher thermal mass; RθJA = 40 °C/W; 1500 W PPPM rating. | Requires larger PCB area; suited for high-reliability industrial systems needing extended surge endurance. | Choose SMBG40HE3/5B for space-constrained automotive modules; select SMCJ40AHE3/5B when board area allows and >600 W headroom is needed. |
Compared with SMBJ40AHE3/5B and SMCJ40AHE3/5B, SMBG40HE3/5B uniquely balances 600 W surge capability, AEC-Q101 compliance, and compact SMBG footprint-making it optimal for automotive and space-limited industrial power rail protection where both performance and qualification matter.
Availability
SMBG40HE3/5B is available at Aetrix Electronics and suitable for automotive engine control units, industrial 48 V power supplies, and telecom interface protection requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for SMBG40HE3/5B 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, efficiency, and automotive qualification.
The SMBG series was developed specifically for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom applications demanding AEC-Q101 compliance and 600 W surge handling.
FAQ
What is the clamping voltage of SMBG40HE3/5B at its rated peak pulse current?
The SMBG40HE3/5B has a maximum clamping voltage (VC) of 64.5 V at its rated peak pulse current (IPPM) of 9.3 A, measured under the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a 600 W transient event and is confirmed in the Vishay datasheet Document Number 88456, page 2.
Is SMBG40HE3/5B suitable for automotive applications?
Yes, SMBG40HE3/5B is explicitly AEC-Q101 qualified (per datasheet note on page 3), making it suitable for automotive applications including engine control units, body electronics, and infotainment power rails. Its construction-including glass-passivated junction, MSL Level 1 rating, and JESD 201 Class 2 whisker resistance-meets automotive manufacturing and reliability requirements.
What does the "HE3" suffix indicate in SMBG40HE3/5B?
The "HE3" suffix in SMBG40HE3/5B denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It distinguishes this automotive-grade variant from commercial "E3" versions (e.g., SMBG40A-E3/5B), which lack AEC-Q101 validation and Class 2 tin whisker mitigation.
What is the thermal resistance of SMBG40HE3/5B, and how is it measured?
The SMBG40HE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, measured when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as defined in the Vishay datasheet (page 3, Thermal Characteristics table). This value assumes standard JEDEC test conditions and guides heatsinking decisions for sustained surge duty cycles.
How does SMBG40HE3/5B differ from SMBJ40AHE3/5B in surge capability?
SMBG40HE3/5B delivers 600 W peak pulse power (10/1000 µs), while SMBJ40AHE3/5B is rated for 400 W under the same waveform. This 50 % higher energy handling enables SMBG40HE3/5B to meet stricter surge immunity standards like ISO 7637-2 Pulse 5a (load dump) without derating, unlike the SMBJ variant which requires careful layout and derating in automotive use cases.
SMBG40HE3/5B 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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 71.4V
- Current - Peak Pulse (10/1000µs):
- 8.4A
- 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)
SMBG40HE3/5B FAQ
1.How can I place an order for SMBG40HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG40HE3/5B 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 SMBG40HE3/5B reliable?
The price and inventory of SMBG40HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG40HE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG40HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG40HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG40HE3/5B?
SMBG40HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG40HE3/5B 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 SMBG40HE3/5B?
For technical support, including SMBG40HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG40HE3/5B requirements.
6.How does Aetrix verify that SMBG40HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG40HE3/5B 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 SMBG40HE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG40HE3/5B?
All SMBG40HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG40HE3/5B, 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 SMBG40HE3/5B part is unused and in its original packaging.
Return procedure for SMBG40HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG40HE3/5B 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 …
