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Vishay General Semiconductor - Diodes Division SMBJ70CAHE3_B/H
- Part No.:
- SMBJ70CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70CAHE3_B/H.pdf
- Description:
- 600W,70V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,871
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Product details
Overview
SMBJ70CAHE3_B/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤113 V at 5.3 A peak surge current - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ70CAHE3_B/H datasheet, SMBJ70CAHE3_B/H pinout, SMBJ70CAHE3_B/H application, or SMBJ70CAHE3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, 113 V maximum clamping voltage at rated IPPM, and compatibility with automated SMT assembly on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche breakdown in both polarities, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 µA at 70 V), while the low incremental surge resistance supports consistent clamping performance under repetitive 10/1000 µs surges at 0.01% duty cycle.
The SMBJ70CAHE3_B/H is rated for TJ = –55 °C to +150 °C operation and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its thermal resistance (RθJA = 100 °C/W) and RθJL = 20 °C/W define power derating behavior above 25 °C ambient, critical for sustained transient duty in enclosed industrial enclosures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 77.8 V / 86.0 V at IT = 1 mA - guaranteed avalanche onset range defining turn-on consistency |
| VC @ IPPM | ≤113 V at 5.3 A - clamping voltage under full 600 W 10/1000 µs surge, limiting downstream stress |
| PPPM | 600 W - peak transient power handling per single 10/1000 µs waveform, validated per Fig. 1 |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves signal integrity in high-impedance sensor lines |
| TJ max | +150 °C - junction temperature limit enabling use in hot industrial environments |
| Package | SMB (DO-214AA) - standardized 2-pin SMT outline with 5.59 mm max length, compatible with JEDEC MS-012 |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Case dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), matte tin-plated leads, MSL Level 1 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical PN junction; accepts reverse surge in either direction |
| Cathode | Transient current entry (positive polarity) | Second terminal of symmetrical PN junction; completes bidirectional conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating lines without external polarity management |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) when mounted per recommended pad layout |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices |
| MSL Level 1 rating | Supports standard lead-free reflow without baking or special handling prior to assembly |
Applications
| Industrial Sensor Interface Protection | Telecom Line Surge Suppression |
|---|---|
|
Use Scenario: Protecting 4–20 mA current-loop sensors in factory automation cabinets exposed to relay-switching transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across sensor input terminals to shunt induced spikes before they reach analog front-end amplifiers. Use Value: Limits transient voltage to ≤113 V, preventing latch-up or damage to precision op-amps and ADCs operating at ±15 V rails. |
Use Scenario: Shielding RS-485 transceivers in outdoor base stations from lightning-induced surges on twisted-pair data lines. IC Role / Device Role / Timing Role: Primary line-side TVS connected between differential pair (A/B) and ground to absorb common-mode energy. Use Value: Clamps 10/1000 µs surges up to 5.3 A without degradation, maintaining signal integrity during multi-event surge exposure. |
| Automotive Body Control Module (BCM) | Consumer Appliance Motor Drive Inputs |
|
Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs against load-dump and jump-start transients in vehicle door modules. IC Role / Device Role / Timing Role: AEC-Q101-qualified bidirectional suppressor placed at connector entry point before ESD protection diodes. Use Value: Withstands 150 °C junction temperature and passes automotive surge tests (ISO 7637-2 Pulse 1/2/3a/3b) without parameter shift. |
Use Scenario: Guarding microcontroller inputs tied to hall-effect motor position sensors in washing machine control boards. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) TVS suppressing commutation spikes from BLDC motor drivers coupled into feedback paths. Use Value: Prevents false triggering of zero-cross detection logic by limiting spike amplitude to <113 V while adding negligible DC loading. |
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 specs, identical SMB package | Lacks automotive qualification; suitable for industrial/commercial designs without AEC requirements | Select when cost sensitivity outweighs automotive reliability validation needs |
| SMAJ70CAHE3_A/H | Lower PPPM (400 W vs. 600 W), SMA package (smaller footprint, higher RθJA = 140 °C/W) | Reduced surge margin and thermal performance; limited to lower-energy transients | Choose only if board space is constrained and peak surge current remains ≤3.5 A |
Compared with SMBJ70CAHE3_B/H, SMBJ70CA-E3/52 offers identical electrical protection but omits AEC-Q101 validation, while SMAJ70CAHE3_A/H trades 33% lower pulse power and inferior thermal dissipation for smaller PCB area - making SMBJ70CAHE3_B/H optimal for automotive and high-reliability industrial surge defense.
Availability
SMBJ70CAHE3_B/H is available at Aetrix Electronics and suitable for industrial sensor interface protection, telecom line surge suppression, and automotive body control module designs requiring stable component supply and AEC-Q101 compliance.
Supply support for SMBJ70CAHE3_B/H 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 and application-specific optimization.
The SMBJ series targets high-energy transient suppression in harsh environments, with design focus on automotive, industrial, and telecom infrastructure where robustness against inductive switching and lightning surges is mandatory.
FAQ
What does the "CA" suffix indicate in SMBJ70CAHE3_B/H?
The "CA" suffix denotes a bidirectional configuration: SMBJ70CAHE3_B/H conducts and clamps symmetrically for both positive and negative voltage transients, unlike unidirectional "A" variants that require correct polarity orientation. This eliminates need for polarity-aware placement in AC-coupled or floating circuits, and is confirmed in Vishay's documentation under "DEVICES FOR BIDIRECTION APPLICATIONS".
Is SMBJ70CAHE3_B/H RoHS-compliant and halogen-free?
Yes, SMBJ70CAHE3_B/H carries the "HE3" suffix, indicating it is RoHS-compliant and AEC-Q101 qualified. Per Vishay's ordering information, "HE3" parts meet RoHS requirements but are not halogen-free; halogen-free versions use the "HM3" suffix (e.g., SMBJ70CAHM3_B/H). The "HE3" designation is explicitly defined in the mechanical data section.
What is the maximum clamping voltage for SMBJ70CAHE3_B/H under surge conditions?
The maximum clamping voltage (VC) for SMBJ70CAHE3_B/H is 113 V, measured at its rated peak pulse current (IPPM) of 5.3 A using a 10/1000 µs waveform. This value is specified in the Electrical Characteristics table for SMBJ70A (bidirectional variant), and applies directly to SMBJ70CAHE3_B/H as part of the SMBJ70CA family.
Does SMBJ70CAHE3_B/H require a heatsink for standard operation?
No, SMBJ70CAHE3_B/H is designed for surface-mount operation without external heatsinking under typical transient conditions. Its thermal resistance (RθJA = 100 °C/W) assumes mounting on 0.2" × 0.2" copper pads per terminal, as specified in the datasheet notes. Continuous power dissipation is limited to 5.0 W, but transient events are non-repetitive - heatsinking is unnecessary unless operating near thermal limits in high-ambient or high-duty-cycle scenarios.
How does the "_B/H" suffix affect packaging and delivery of SMBJ70CAHE3_B/H?
The "_B/H" suffix indicates tape-and-reel packaging in 7" diameter reels containing 750 units, using plastic carrier tape (package code "H"). This is confirmed in the Ordering Information table, where "SMBJ5.0AHE3_B/H" is listed with base quantity 750 and delivery mode "7\" diameter plastic tape and reel". The "B" denotes revision level; "H" defines the reel size and quantity format used for SMT placement equipment compatibility.
SMBJ70CAHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ70CAHE3_B/H FAQ
1.How can I place an order for SMBJ70CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70CAHE3_B/H 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_B/H reliable?
The price and inventory of SMBJ70CAHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ70CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70CAHE3_B/H?
SMBJ70CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70CAHE3_B/H 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_B/H?
For technical support, including SMBJ70CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70CAHE3_B/H requirements.
6.How does Aetrix verify that SMBJ70CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ70CAHE3_B/H 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_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ70CAHE3_B/H?
All SMBJ70CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70CAHE3_B/H, 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_B/H part is unused and in its original packaging.
Return procedure for SMBJ70CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70CAHE3_B/H Tags
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