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Vishay General Semiconductor - Diodes Division SMBG43CHE3/52
- Part No.:
- SMBG43CHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG43CHE3/52.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,934
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Product details
Overview
SMBG43CHE3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) package, designed for robust overvoltage protection of sensitive electronics. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 69.4 V maximum clamping voltage (VC) at 8.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs and signal lines in automotive power systems.
For engineers reviewing the SMBG43CHE3/52 datasheet, SMBG43CHE3/52 pinout, SMBG43CHE3/52 application, or SMBG43CHE3/52 equivalent, this part is evaluated for AEC-Q101 qualified surge protection in engine control units, battery management interfaces, and 12 V/24 V DC power rails where low-leakage (<1.0 µA at VWM) and fast response (<1 ns) are critical.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging a glass-passivated silicon junction to deliver precise reverse standoff and rapid avalanche conduction under transients. Its thermal resistance (RθJA = 100 °C/W) and junction temperature limit (TJ = 150 °C) support reliable operation on standard 5.0 mm × 5.0 mm copper pads.
The SMBG43CHE3/52 is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits low incremental surge resistance - enabling effective suppression of load-dump and ISO 7637-2 pulses in automotive environments without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system nominal voltage (e.g., 36 V automotive rail). |
| VBR @ IT = 1 mA | 47.8–52.8 V - Measured breakdown range confirming tight tolerance for consistent turn-on behavior across production lots. |
| VC @ IPPM = 8.6 A | 69.4 V - Clamped voltage during 10/1000 µs surge; defines maximum stress imposed on protected downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capacity; supports compliance with ISO 16750-2 and SAE J1113-11 test levels. |
| IFSM | 100 A - Single-half-sine surge current rating (8.3 ms); validates suitability for alternator load-dump protection. |
| Leakage @ VWM | <1.0 µA - Ultra-low reverse leakage ensures minimal standby power loss and no interference with high-impedance sensor biasing. |
| TJ Range | –55 °C to +150 °C - Full automotive-grade temperature operation; qualified per AEC-Q101 for under-hood deployment. |
Pinout & Package
DO-215AA (SMBG) surface-mount package with gull-wing leads; matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on marked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; completes clamping loop during positive transients. |
| Cathode | Protected line connection | Connected to the line being protected (e.g., battery feed); conducts avalanche current when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive applications including engine control, body electronics, and ADAS power domains. |
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime; resistant to humidity and contamination in harsh environments. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk. |
| 600 W 10/1000 µs rating | Meets ISO 7637-2 Pulse 5a/b energy requirements for 12 V and 24 V vehicle systems. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage overshoot during fast transients, reducing stress on protected MOSFET gate oxides and logic inputs. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protection of microcontroller GPIO and CAN transceiver power pins against load-dump surges during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and local LDO input to limit transient voltage before regulation. Use Value: Limits peak voltage to ≤69.4 V during 100 A/8.3 ms load dump, preventing LDO overvoltage shutdown and MCU brownout. |
Use Scenario: Guarding 24 V DC digital input channels against field-wiring induced transients in factory automation cabinets. IC Role / Device Role / Timing Role: Primary front-end surge clamp on optocoupler input side, shunting energy before current-limiting resistor. Use Value: Withstands repeated 600 W surges while maintaining <1.0 µA leakage - preserving input threshold accuracy and long-term channel integrity. |
| Automotive Battery Management System (BMS) | Telecom Power Supply Interface |
Use Scenario: Safeguarding cell monitor IC supply lines from jump-start voltage spikes and grounding faults in 48 V mild-hybrid architectures. IC Role / Device Role / Timing Role: Standoff-rated TVS on VDD rail of analog front-end IC, sized to clamp within 1 ns of transient onset. Use Value: Fast response and low VC ensure cell voltage measurement accuracy remains unaffected during 10/1000 µs surges up to 600 W. |
Use Scenario: Protecting -48 V telecom rectifier output stage from lightning-induced surges on distribution bus lines. IC Role / Device Role / Timing Role: Secondary clamping device downstream of primary MOV, providing precise voltage limiting for downstream DC/DC converters. Use Value: Tight VBR tolerance (±5.2%) enables predictable coordination with upstream protectors, avoiding premature conduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43AHE3/52 | Same VWM (43 V), identical DO-215AB (SMB) package but slightly higher VC (70.1 V @ 8.5 A); lower RθJA (85 °C/W). | Higher thermal efficiency allows tighter layout spacing; preferred where board space permits larger pad area. | Select SMBJ43AHE3/52 if thermal derating margin is constrained and PCB copper area can be increased beyond 5.0 mm × 5.0 mm. |
| SMCJ43AHE3/52 | Same VWM and VBR, but DO-214AB (SMC) package with 1500 W PPPM; 3× higher surge rating and larger footprint. | Used where IEC 61000-4-5 Level 4 immunity is required; not suitable for space-constrained automotive modules. | Choose SMCJ43AHE3/52 only when 1500 W surge capability is mandated and mechanical envelope allows 7.11 mm × 6.22 mm footprint. |
Compared with SMBG43CHE3/52, SMBJ43AHE3/52 offers better thermal performance in the same height profile, while SMCJ43AHE3/52 trades compactness for significantly higher surge endurance - making SMBG43CHE3/52 optimal for AEC-Q101-compliant, space-limited 600 W protection tasks.
Availability
SMBG43CHE3/52 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input protection, and telecom power interface applications requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMBG43CHE3/52 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMBG series was engineered specifically for AEC-Q101-compliant surface-mount transient suppression in space-constrained automotive power domains - balancing low profile, high surge capability, and production-ready manufacturability.
FAQ
What is the key difference between SMBG43CHE3/52 and SMBG43A-E3/52?
The SMBG43CHE3/52 is AEC-Q101 qualified and uses the HE3 suffix, indicating enhanced reliability testing for automotive use, while SMBG43A-E3/52 carries the E3 suffix and is commercial-grade only. Both share identical electrical specs and DO-215AA packaging, but SMBG43CHE3/52 undergoes additional stress screening including temperature cycling and HTRB per AEC-Q101 requirements - making it mandatory for under-hood automotive deployments.
Does SMBG43CHE3/52 support lead-free reflow assembly?
Yes, SMBG43CHE3/52 meets MSL Level 1 per J-STD-020 with a maximum peak reflow temperature of 260 °C, and its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards. No pre-baking is required, and it is fully compatible with standard Pb-free reflow profiles used in automotive electronics manufacturing.
What is the maximum clamping voltage of SMBG43CHE3/52 under surge conditions?
The SMBG43CHE3/52 has a maximum clamping voltage (VC) of 69.4 V at 8.6 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Can SMBG43CHE3/52 be used in bi-directional protection circuits?
No - SMBG43CHE3/52 is a unidirectional TVS diode, indicated by the "A" suffix (not "CA"). It conducts only in reverse bias above VBR and blocks forward current like a standard diode. For bi-directional protection (e.g., AC lines or differential data buses), the SMBG43CAHE3/52 variant must be used, which provides symmetrical clamping in both polarities.
How does the thermal resistance of SMBG43CHE3/52 affect its surge performance?
SMBG43CHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads. This value directly impacts repetitive surge capability: at elevated ambient temperatures, derating curves (Fig. 2 in datasheet) require reducing IPPM to avoid exceeding TJ = 150 °C - so sustained surge duty cycles demand careful thermal layout verification.
SMBG43CHE3/52 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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- 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)
SMBG43CHE3/52 FAQ
1.How can I place an order for SMBG43CHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG43CHE3/52 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 SMBG43CHE3/52 reliable?
The price and inventory of SMBG43CHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG43CHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG43CHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG43CHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG43CHE3/52?
SMBG43CHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG43CHE3/52 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 SMBG43CHE3/52?
For technical support, including SMBG43CHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG43CHE3/52 requirements.
6.How does Aetrix verify that SMBG43CHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG43CHE3/52 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 SMBG43CHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG43CHE3/52?
All SMBG43CHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG43CHE3/52, 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 SMBG43CHE3/52 part is unused and in its original packaging.
Return procedure for SMBG43CHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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