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Vishay General Semiconductor - Diodes Division SMBG33CAHE3/52
- Part No.:
- SMBG33CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG33CAHE3/52.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,217
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Product details
Overview
SMBG33CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping voltage transients on signal or power lines. It features a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive electronics protection.
For engineers reviewing the SMBG33CAHE3/52 datasheet, SMBG33CAHE3/52 pinout, SMBG33CAHE3/52 application, or SMBG33CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, low clamping voltage (53.3 V at IPPM), junction temperature range (−55 °C to +150 °C), and RoHS-compliant, AEC-Q101-qualified construction for harsh-environment reliability.
Technical Context
This TVS diode operates symmetrically in both directions, with identical electrical characteristics for positive and negative polarity surges - confirmed by specification notes stating "Electrical characteristics apply in both directions" and explicit VBR min/max values listed for bidirectional types. Its glass-passivated junction ensures stable breakdown behavior under repetitive surge stress.
The device uses a low-profile SMBG (DO-215AA) surface-mount package with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, rated MSL level 1 (peak reflow 260 °C), and exhibits typical thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead) - critical for thermal management in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping begins; defines safe working margin below breakdown |
| VBR (min/max) | 36.7 V / 40.6 V at IT = 1 mA - guaranteed breakdown threshold range; ensures predictable turn-on during transients |
| VC @ IPPM | 53.3 V - clamping voltage at peak pulse current; limits downstream voltage stress during 600 W surge events |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform; supports high-energy ESD and load-dump suppression |
| IPPM | 11.3 A - calculated peak pulse current (PPPM/VC); defines surge current capacity under standardized test conditions |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive or industrial environments |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Surge current path (reversible) | Both terminals function identically; no cathode band marking; connects across protected line and ground or differential pair |
| Case (exposed pad) | Thermal conduction path | Not electrically connected; provides mechanical stability and aids heat dissipation via copper pad layout per datasheet Fig. 5 |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 600 W peak pulse power | Withstands automotive load-dump pulses and IEC 61000-4-5 surge events up to 4 kV (indirect) without degradation |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| Low-profile SMBG package | 0.255" × 0.155" footprint with 0.030" height - fits space-constrained layouts while maintaining 0.2" × 0.2" copper pad thermal performance |
| Glass passivated junction | Improves long-term stability of VBR and leakage under thermal cycling and humidity exposure |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine compartments exposed to load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor signal line and chassis ground to clamp transients before they reach ADC input or signal conditioner. Use Value: Limits voltage excursion to ≤53.3 V during 11.3 A surge, preserving sensor accuracy and preventing microcontroller reset or damage. | Use Scenario: Safeguarding CAN_H and CAN_L lines in industrial PLC gateways against EFT (IEC 61000-4-4) and surge (IEC 61000-4-5). IC Role / Device Role / Timing Role: Differential TVS pair (one per line) referenced to common ground, suppressing common-mode transients without distorting 1 Mbps CAN signaling. Use Value: Maintains signal integrity by clamping within 53.3 V while exhibiting <1.0 µA leakage at 33 V - no impact on bus bias or termination. |
| Consumer USB Port ESD Protection | Telecom Power Rail Clamp |
Use Scenario: Shielding USB 2.0 D+ and D− lines in set-top boxes or smart displays from human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair to shunt ±8 kV contact discharge energy away from USB transceiver PHY. Use Value: Sub-1 ns response time and 53.3 V clamping prevent latch-up or permanent damage to 3.3 V tolerant PHY circuitry. | Use Scenario: Clamping 24 V DC power rails in telecom remote radio units subjected to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: TVS connected between rail and ground to absorb 600 W surge energy from induced transients on PoE or auxiliary power feeds. Use Value: Withstands 100 A non-repetitive forward surge (IFSM) and maintains VWM = 33 V margin above nominal 24 V rail - avoids false triggering during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA-E3/52 | Same VWM (33 V), but lower PPPM = 600 W (identical), higher VC = 53.3 V (same), yet rated only to 150 °C (same); differs in package outline (SMB vs SMBG) and thermal resistance (RθJA = 110 °C/W vs 100 °C/W) | Less effective thermal dissipation in high-density layouts; not AEC-Q101 qualified | Select SMBG33CAHE3/52 when automotive qualification or tighter thermal performance is required. |
| 1.5KE33CA | Higher PPPM = 1500 W, axial DO-201 package, VC = 53.3 V (same), but larger footprint and no AEC-Q101 rating; VBR range wider (36.7–42.2 V) | Not suitable for automated SMT assembly; incompatible with space-constrained PCBs | Choose SMBG33CAHE3/52 for surface-mount compatibility, AEC-Q101 compliance, and consistent 0.096 g weight in tape-and-reel delivery. |
Compared with SMBJ33CA-E3/52 and 1.5KE33CA, SMBG33CAHE3/52 delivers identical clamping performance in a smaller, automotive-qualified package optimized for automated placement and thermal efficiency - making it the preferred choice for next-generation vehicle ECUs and compact industrial controllers.
Availability
SMBG33CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer USB port protection, and telecom power rail clamping requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for SMBG33CAHE3/52 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, power efficiency, and application-specific validation.
The SMBG series is engineered for high-reliability transient suppression in automotive, industrial, and communications systems - delivering robust surge immunity in compact, surface-mount formats with rigorous qualification to AEC-Q101 and JEDEC standards.
FAQ
What is the breakdown voltage range of SMBG33CAHE3/52?
The SMBG33CAHE3/52 has a guaranteed breakdown voltage (VBR) range of 36.7 V to 40.6 V at a test current of 1 mA, as specified in the Vishay datasheet Document Number 88456. This range ensures reliable, repeatable clamping onset across production lots and temperature extremes, directly supporting design margin calculations for 33 V system rails.
Is SMBG33CAHE3/52 suitable for automotive applications?
Yes, SMBG33CAHE3/52 is AEC-Q101 qualified and explicitly marked with the "HE3" suffix denoting RoHS compliance and automotive qualification. It meets requirements for temperature cycling, high-temperature reverse bias, and surge endurance - making SMBG33CAHE3/52 appropriate for engine control, body electronics, and ADAS sensor protection per ISO 16750 and ISO 7637-2.
What does the "CA" suffix indicate in SMBG33CAHE3/52?
The "CA" suffix in SMBG33CAHE3/52 denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. As confirmed in the Vishay datasheet, electrical characteristics - including VBR, VC, and IPPM - apply identically in either direction, eliminating need for polarity-aware layout.
What is the clamping voltage of SMBG33CAHE3/52 at its rated peak pulse current?
The SMBG33CAHE3/52 clamps to a maximum of 53.3 V at its peak pulse current (IPPM) of 11.3 A, derived from the 600 W peak pulse power rating and VC value specified in the datasheet. This clamping voltage is measured under standardized 10/1000 µs waveform conditions and defines the upper voltage limit imposed on protected circuitry during surge events.
Does SMBG33CAHE3/52 require a heatsink for standard operation?
No, SMBG33CAHE3/52 does not require an external heatsink under typical transient conditions. Its SMBG (DO-215AA) package achieves sufficient thermal dissipation via recommended 0.2" × 0.2" copper pads per terminal, yielding RθJA = 100 °C/W. Continuous power dissipation remains negligible; thermal design focuses on transient energy absorption, not steady-state cooling.
SMBG33CAHE3/52 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 11.3A
- 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)
SMBG33CAHE3/52 FAQ
1.How can I place an order for SMBG33CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG33CAHE3/52 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 SMBG33CAHE3/52 reliable?
The price and inventory of SMBG33CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG33CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG33CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG33CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG33CAHE3/52?
SMBG33CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG33CAHE3/52 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 SMBG33CAHE3/52?
For technical support, including SMBG33CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG33CAHE3/52 requirements.
6.How does Aetrix verify that SMBG33CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG33CAHE3/52 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 SMBG33CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG33CAHE3/52?
All SMBG33CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG33CAHE3/52, 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 SMBG33CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBG33CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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