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Vishay General Semiconductor - Diodes Division SMBJ70CAHE3_A/I
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- Part No.:
- SMBJ70CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70CAHE3_A/I.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,597
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Product details
Overview
SMBJ70CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 70 V standoff voltage (VWM), 77.8–86.0 V breakdown voltage (VBR) at 1 mA, 113 V maximum clamping voltage (VC) at 5.3 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used in industrial sensor protection and telecom interface surge suppression.
For engineers reviewing the SMBJ70CAHE3_A/I datasheet, SMBJ70CAHE3_A/I pinout, SMBJ70CAHE3_A/I application, or SMBJ70CAHE3_A/I equivalent, this device is selected for robust bidirectional ESD and lightning surge protection where low clamping voltage, AEC-Q101 qualification, and MSL Level 1 moisture sensitivity are required in space-constrained PCB layouts.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns) to transient events.
The device delivers 600 W peak pulse power handling with a 10/1000 µs waveform under derated conditions, and maintains clamping performance across -55 °C to +150 °C operating junction temperature range. Thermal resistance is 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 70 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 77.8–86.0 V at 1 mA - Confirmed minimum/maximum voltage at which device enters avalanche breakdown; ensures predictable turn-on behavior. |
| VC (Clamping Voltage) | 113 V at IPPM = 5.3 A - Peak voltage seen across protected circuit during 10/1000 µs surge; directly limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy absorption capability per single 10/1000 µs event; enables compliance with IEC 61000-4-5 Level 3. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Minimal standby current leakage at rated standoff voltage; preserves low-power system integrity. |
| TJ max. | +150 °C - Maximum allowable junction temperature; supports operation in high-ambient environments like automotive engine bays or industrial enclosures. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm length, 4.06 mm width, and 2.20 mm height; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals with identical electrical behavior in either direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve as interchangeable surge current entry/exit points; no cathode band marking required for bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses (e.g., RS-485), and ungrounded interfaces without polarity constraints. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock - suitable for under-hood and infotainment systems. |
| MSL Level 1 rating | Zero floor life limitation; can be stored indefinitely at ≤30 °C/60% RH and assembled without baking prior to reflow. |
| 600 W peak pulse power | Meets IEC 61000-4-5 (10/1000 µs) surge immunity requirements for industrial and telecom equipment up to Level 3. |
| Glass-passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity-induced parameter drift versus epoxy-passivated alternatives. |
Applications
| Industrial Sensor Interface Protection | Automotive CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting 4–20 mA current-loop sensors and analog voltage outputs from inductive switching spikes in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal line and ground to clamp ±1 kV EFT bursts and 0.5 kV surge events. Use Value: Limits voltage excursion to ≤113 V during 5.3 A transients, preventing damage to precision ADCs and op-amps downstream. |
Use Scenario: Surge protection on CAN_H/CAN_L differential pair in automotive body control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Symmetrical TVS array (two SMBJ70CAHE3_A/I devices) guarding each line against common-mode transients. Use Value: Maintains signal integrity by clamping within 113 V while supporting AEC-Q101 qualification for automotive deployment. |
| Telecom Line Card Surge Protection | Consumer USB Port ESD Safeguard |
Use Scenario: Front-end protection for Ethernet PHYs and xDSL line drivers subjected to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary clamping device mounted at connector entry point to shunt >1 kA surge currents away from PHY ICs. Use Value: Delivers 600 W pulse power handling with <1 ns response, ensuring sub-microsecond clamping before IC latch-up occurs. |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed after primary ESD array to suppress residual 8 kV contact discharge events. Use Value: Provides 1.0 µA leakage at 70 V, minimizing impact on high-speed signal rise/fall times while meeting IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70CA-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VBR/VC/PPPM specs, RoHS-compliant but not automotive-qualified. | Lacks AEC-Q101 validation; unsuitable for automotive safety-critical modules requiring certified reliability. | Select when cost-sensitive industrial or consumer designs do not require automotive qualification. |
| SMCJ70CAHE3_A/I | Same electrical specs but in larger SMC (DO-214AB) package; higher thermal mass yields 1500 W PPPM rating and lower RθJA (50 °C/W). | Requires larger PCB footprint and may not fit in space-constrained SMB layouts; better suited for high-energy surge zones. | Choose when surge energy exceeds 600 W or board layout allows SMC footprint for enhanced thermal margin. |
Compared with SMBJ70CAHE3_A/I, SMBJ70CA-E3/52 offers identical clamping performance at lower cost but no automotive qualification, while SMCJ70CAHE3_A/I provides higher surge capacity in a larger package - selection depends on space, energy, and qualification requirements.
Availability
SMBJ70CAHE3_A/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive CAN bus nodes, and telecom line card surge protection requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ70CAHE3_A/I 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ70CAHE3_A/I at its rated peak pulse current?
The SMBJ70CAHE3_A/I has a maximum clamping voltage (VC) of 113 V at 5.3 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value represents the upper limit of voltage imposed on the protected circuit during a surge event and is critical for ensuring downstream ICs remain within their absolute maximum ratings. The SMBJ70CAHE3_A/I achieves this clamping performance while maintaining bidirectional symmetry and AEC-Q101 qualification.
Is SMBJ70CAHE3_A/I suitable for automotive applications?
Yes, SMBJ70CAHE3_A/I is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and infotainment systems. Its qualification covers temperature cycling, highly accelerated life testing, and mechanical shock - all verified per AEC standards. The "HE3" suffix explicitly denotes AEC-Q101 compliance, making SMBJ70CAHE3_A/I appropriate for automotive-grade designs where reliability under extended temperature and vibration stress is mandatory.
How does the bidirectional design of SMBJ70CAHE3_A/I affect its placement on a PCB?
The SMBJ70CAHE3_A/I has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. This simplifies PCB layout for AC-coupled or differential signal lines such as RS-485, CAN, or Ethernet pairs, where traditional unidirectional TVS diodes would require careful anode/cathode alignment. The symmetrical terminal behavior means SMBJ70CAHE3_A/I can be mounted in either direction without affecting clamping performance or circuit protection function.
What is the maximum operating temperature for SMBJ70CAHE3_A/I?
The SMBJ70CAHE3_A/I supports an operating junction temperature range of -55 °C to +150 °C, with storage temperature matching this span. This wide range enables deployment in extreme environments such as under-hood automotive locations, industrial motor drives, and outdoor telecom equipment. The device's thermal resistance (RθJA = 100 °C/W) is specified for standard 0.2" × 0.2" copper pads, and derating curves in the datasheet guide safe power dissipation above 25 °C ambient.
Does SMBJ70CAHE3_A/I meet any international surge immunity standards?
Yes, SMBJ70CAHE3_A/I is engineered to meet IEC 61000-4-5 (surge immunity) Level 3 requirements with its 600 W peak pulse power rating under the 10/1000 µs waveform. It also supports IEC 61000-4-2 (ESD) Level 4 protection when used in conjunction with proper layout practices. These capabilities are validated through standardized test waveforms and form the basis for its use in industrial PLCs, telecom infrastructure, and automotive ECUs where compliance with electromagnetic compatibility (EMC) standards is mandatory. The SMBJ70CAHE3_A/I delivers consistent clamping performance across its full temperature and lifetime specifications.
SMBJ70CAHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 5.3A
- 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 (SMBJ)
SMBJ70CAHE3_A/I FAQ
1.How can I place an order for SMBJ70CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70CAHE3_A/I 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 SMBJ70CAHE3_A/I reliable?
The price and inventory of SMBJ70CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ70CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70CAHE3_A/I?
SMBJ70CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70CAHE3_A/I 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 SMBJ70CAHE3_A/I?
For technical support, including SMBJ70CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ70CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ70CAHE3_A/I 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 SMBJ70CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ70CAHE3_A/I?
All SMBJ70CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70CAHE3_A/I, 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 SMBJ70CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ70CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70CAHE3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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