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Vishay General Semiconductor - Diodes Division SMBG20AHE3/52
- Part No.:
- SMBG20AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG20AHE3/52.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,260
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Product details
Overview
SMBG20AHE3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 1 mA, 32.4 V clamping voltage (VC) at 18.5 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive ECUs, industrial sensor interfaces, and power supply input stages.
For engineers reviewing the SMBG20AHE3/52 datasheet, SMBG20AHE3/52 pinout, SMBG20AHE3/52 application, or SMBG20AHE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1 μA leakage at 20 V), then rapidly avalanches when transient voltage exceeds VBR, diverting surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive transients.
Designed for automotive-grade environments, SMBG20AHE3/52 meets AEC-Q101 stress testing requirements and is rated for -55 °C to +150 °C operating junction temperature. Its thermal resistance (RθJA = 100 °C/W) and RθJL = 20 °C/W support effective heat dissipation during 8.3 ms half-sine surges up to 100 A (IFSM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - maximum continuous reverse working voltage before clamping begins; sets upper limit for protected circuit's nominal DC rail. |
| VBR @ IT = 1 mA | 22.2–24.5 V - guaranteed avalanche onset range; ensures predictable turn-on margin above VWM. |
| VC @ IPPM = 18.5 A | 32.4 V - clamped voltage during 600 W transient; defines worst-case overvoltage seen by protected load. |
| PPPM | 600 W - peak pulse power handling with 10/1000 μs waveform; validates immunity to IEC 61000-4-5 Level 4 surges. |
| IFSM | 100 A - non-repetitive forward surge rating (8.3 ms half-sine); supports protection against inductive switch-off events. |
| Junction Temp Range | -55 °C to +150 °C - enables deployment in engine bay, motor drives, and industrial control cabinets without derating. |
| Package | SMBG (DO-215AA) - surface-mount outline with 0.235" × 0.255" footprint; optimized for high-density PCB layouts and reflow compatibility. |
Pinout & Package
Package: SMBG (DO-215AA) - low-profile, molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance. Polarity marked with cathode band; anode and cathode terminals aligned per standard SMBG orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection point for unidirectional clamping | Connected to protected line (e.g., 24 V rail); conducts surge current to ground when voltage exceeds VBR. |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane; completes shunt path during transient event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD; supports Tier-1 ECU designs. |
| 600 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 combination wave surges up to ±2 kV (open-circuit)/±1 kV (short-circuit) without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage overshoot during fast transients - critical for safeguarding 3.3 V/5 V logic and MOSFET gate drivers. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift over temperature and lifetime; improves long-term field reliability. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns; eliminates bake requirements pre-assembly. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protection of 24 V supply inputs in body control modules (BCM) and lighting drivers against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between battery rail and DC-DC converter input. Use Value: Limits voltage excursion to ≤32.4 V during 100 A load dump events, preventing damage to upstream regulators and microcontrollers. | Use Scenario: Guarding analog outputs (e.g., 4–20 mA current loops) in PLC I/O modules against ESD and cable-induced surges. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to system ground, installed at connector entry point. Use Value: Clamps transients within <1 ns response time while maintaining <1 μA leakage at 20 V - preserving signal integrity and measurement accuracy. |
| Telecom DC Power Feeds | Consumer Appliance Motor Control |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) against induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on midspan injector output side. Use Value: Absorbs 600 W surge energy without failure, enabling compliance with IEC 61000-4-5 Ed. 3 Level 4 immunity requirements. | Use Scenario: Protecting gate drivers and MCU I/O in washing machine motor inverters exposed to back-EMF spikes. IC Role / Device Role / Timing Role: Localized clamp across half-bridge high-side driver supply rail. Use Value: Prevents latch-up or oxide rupture in 3.3 V logic by limiting transient overshoot to 32.4 V during 100 A inductive switching events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG20AE3/52 | Same electrical specs and AEC-Q101 qualification; differs only in packaging suffix (E3 vs HE3) - HE3 denotes AEC-Q101 grade, E3 is industrial grade. | No functional difference in circuit operation; HE3 version provides full automotive qualification traceability. | Select SMBG20AHE3/52 when automotive PPAP documentation and AEC-Q101 conformance records are required. |
| SMAJ20A | Same VWM (20 V), VC = 32.4 V, but lower PPPM = 400 W; SMA package (DO-214AC) vs SMBG (DO-215AA); RθJA = 130 °C/W. | Lower surge capacity and higher thermal resistance limit use to less severe environments (e.g., consumer vs automotive). | Choose SMAJ20A only for cost-sensitive, non-automotive applications where 400 W surge rating suffices and board space allows larger SMA footprint. |
Compared with SMBG20AE3/52, SMBG20AHE3/52 guarantees full AEC-Q101 compliance documentation; versus SMAJ20A, it delivers 50 % higher surge power handling and superior thermal performance in the same PCB area - making it the preferred choice for mission-critical 24 V systems.
Availability
SMBG20AHE3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interface modules, and telecom DC power feed applications requiring stable component supply and AEC-Q101 traceability.
Supply support for SMBG20AHE3/52 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMBG series was developed specifically for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and 600 W surge capability are mandatory.
FAQ
What is the clamping voltage of SMBG20AHE3/52 at its rated peak pulse current?
The SMBG20AHE3/52 has a maximum clamping voltage (VC) of 32.4 V at 18.5 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBG20AHE3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBG20AHE3/52 suitable for bidirectional transient protection?
No - SMBG20AHE3/52 is a unidirectional TVS diode, indicated by the "A" suffix (vs "CA" for bidirectional). It conducts only in reverse bias above VBR and blocks forward current beyond ~3.5 V. For bidirectional AC-line or data-line protection, select SMBG20CAHE3/52 instead. The SMBG20AHE3/52 must be oriented with its cathode band toward the protected line and anode to ground.
Does SMBG20AHE3/52 require derating at elevated ambient temperatures?
Yes - SMBG20AHE3/52 must be derated above 25 °C ambient per Figure 2 in the Vishay datasheet (Document Number: 88456). At 85 °C ambient, its 600 W peak pulse power rating reduces to approximately 420 W. Derating ensures junction temperature remains ≤150 °C during surge events. Layout with 0.2" × 0.2" copper pads per terminal is required to achieve published ratings.
What is the meaning of the "HE3" suffix in SMBG20AHE3/52?
The "HE3" suffix in SMBG20AHE3/52 indicates RoHS-compliant construction with full AEC-Q101 qualification (H = AEC-Q101, E3 = RoHS-compliant industrial grade). This distinguishes it from E3-only (industrial, non-automotive) and M3/HM3 (halogen-free) variants. The HE3 grade ensures compliance documentation, lot-level traceability, and stress-test validation required for automotive production.
Can SMBG20AHE3/52 replace SMAJ20A in an existing design?
SMBG20AHE3/52 is not a direct drop-in replacement for SMAJ20A due to different packages: SMBG (DO-215AA) vs SMA (DO-214AC). While both share identical VWM (20 V) and VC (32.4 V), the SMBG20AHE3/52 offers 50 % higher peak pulse power (600 W vs 400 W) and lower thermal resistance. PCB layout revision is required to accommodate the SMBG footprint, but the upgrade enhances surge robustness in demanding applications.
SMBG20AHE3/52 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 18.5A
- 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)
SMBG20AHE3/52 FAQ
1.How can I place an order for SMBG20AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG20AHE3/52 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 SMBG20AHE3/52 reliable?
The price and inventory of SMBG20AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG20AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG20AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG20AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG20AHE3/52?
SMBG20AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG20AHE3/52 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 SMBG20AHE3/52?
For technical support, including SMBG20AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG20AHE3/52 requirements.
6.How does Aetrix verify that SMBG20AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG20AHE3/52 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 SMBG20AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG20AHE3/52?
All SMBG20AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG20AHE3/52, 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 SMBG20AHE3/52 part is unused and in its original packaging.
Return procedure for SMBG20AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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