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Vishay General Semiconductor - Diodes Division SMBJ12CAHE3_B/H
- Part No.:
- SMBJ12CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ12CAHE3_B/H.pdf
- Description:
- 600W,12V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,899
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Product details
Overview
SMBJ12CAHE3_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 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 19.9 V maximum clamping voltage (VC) at 30.2 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used in industrial sensor interface protection.
For engineers reviewing the SMBJ12CAHE3_B/H datasheet, SMBJ12CAHE3_B/H pinout, SMBJ12CAHE3_B/H application, or SMBJ12CAHE3_B/H equivalent, this device is selected for robust ESD and surge immunity in bidirectional AC-coupled or floating signal paths where polarity-agnostic clamping is required - especially in automotive-grade sensor modules, industrial I/O terminals, and telecom line interfaces meeting AEC-Q101 reliability requirements.
Technical Context
This TVS operates symmetrically in both directions due to its bidirectional construction, enabling protection of differential or ungrounded signal pairs without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<5 µA at VWM), while the low incremental surge resistance supports consistent clamping performance under repetitive transients.
The device is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility. Its AEC-Q101 qualification (denoted by HE3 suffix) confirms suitability for automotive electronics subjected to extended thermal cycling and mechanical shock.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 12 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 13.3–14.7 V at 1 mA - Voltage at which device enters avalanche conduction; tight tolerance enables predictable turn-on behavior. |
| VC (Clamping Voltage) | 19.9 V at 30.2 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy absorption capability; validates protection against IEC 61000-4-5 Level 3 surges. |
| ID (Reverse Leakage) | ≤5 µA at 12 V - Minimal standby current draw; critical for low-power sensor nodes and battery-backed systems. |
| TJ max. | 150 °C - Maximum junction temperature rating; supports operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.21 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; both ends function identically in either direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (both ends) | Transient Current Path | Provides bidirectional conduction path for surge current; no polarity dependency allows placement on floating or AC-coupled lines. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces requiring long-term reliability under thermal cycling. |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 combination wave surges up to 1 kV/500 A without degradation when mounted per recommended pad layout. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage exposure to downstream ICs - e.g., protects RS-485 transceivers rated for ≤25 V absolute maximum. |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free assembly without moisture-related popcorning or delamination risks. |
| Glass-passivated junction | Ensures stable electrical parameters across temperature and lifetime; reduces parameter drift versus epoxy-passivated alternatives. |
Applications
| Industrial Sensor Interface | Automotive CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in factory automation PLC modules exposed to relay coil switching transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between sensor output and ADC input, shunting induced spikes before they reach precision signal chain. Use Value: Maintains signal integrity by limiting transient overvoltage to ≤19.9 V, preventing ADC saturation or op-amp latch-up during 600 W surge events. |
Use Scenario: Secondary-level surge suppression on CAN_H/CAN_L lines in body control modules, supplementing primary TVS or common-mode chokes. IC Role / Device Role / Timing Role: Fast-response voltage clamp absorbing differential-mode surges (e.g., ISO 7637-2 Pulse 1/2b) on bidirectional data bus. Use Value: Clamps transients within 1 ns response time while preserving CAN signal rise/fall times due to low junction capacitance (~100 pF at 0 V). |
| Telecom Line Interface | Consumer USB Port ESD Protection |
|
Use Scenario: Protecting Ethernet PHY differential pairs or DSL line drivers from lightning-induced surges in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Symmetrical TVS placed across twisted-pair lines to clamp common- and differential-mode transients without disrupting DC bias. Use Value: Enables compliance with ITU-T K.21 basic protection level via 600 W surge handling and 150 °C operational range for uncooled enclosures. |
Use Scenario: Board-level ESD protection for USB 2.0 D+/D− lines in smart home hubs, guarding against ±8 kV contact discharge per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp minimizing signal distortion while diverting ESD current away from USB transceiver ESD structures. Use Value: Limits clamping voltage to 19.9 V during 30.2 A ESD event, staying well below USB transceiver's 30 V absolute maximum rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA-E3/52 | Same electrical specs and SMB package, but commercial-grade (non-AEC-Q101 qualified); RoHS-compliant with matte tin plating. | Lacks automotive qualification; suitable for industrial/commercial designs not requiring AEC-Q101 validation. | Select SMBJ12CAHE3_B/H when automotive qualification, extended temperature validation, or traceable lot documentation is mandatory. |
| SMCJ12CAHE3_A/H | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher thermal mass supports 1500 W PPPM rating. | Requires larger PCB area and higher mounting pad thermal mass; better suited for high-energy surge zones like power entry. | Choose SMBJ12CAHE3_B/H for space-constrained layouts where 600 W suffices; use SMCJ12CAHE3_A/H only when >1 kW surge handling is required. |
Compared with SMBJ12CA-E3/52, SMBJ12CAHE3_B/H adds AEC-Q101 qualification and tighter process controls for automotive use; compared with SMCJ12CAHE3_A/H, it trades peak power capacity for compact SMB footprint - making SMBJ12CAHE3_B/H optimal for board-edge signal-line protection where space and qualification are prioritized over extreme energy handling.
Availability
SMBJ12CAHE3_B/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive CAN bus nodes, and telecom line protection requiring stable component supply with AEC-Q101 assurance and lead-free assembly compatibility.
Supply support for SMBJ12CAHE3_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, efficiency, and application-specific optimization.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust transient suppression in automotive, industrial, and communications infrastructure where fast response, stable clamping, and qualification-grade consistency are essential.
FAQ
What does the "CA" suffix indicate in SMBJ12CAHE3_B/H?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ12CAHE3_B/H provides symmetrical clamping in both polarities - ideal for protecting AC-coupled, differential, or floating signal lines where voltage transients may occur with either polarity. This differs from unidirectional "A" variants that require correct cathode orientation.
Is SMBJ12CAHE3_B/H suitable for IEC 61000-4-5 surge testing?
Yes, SMBJ12CAHE3_B/H is rated for 600 W peak pulse power with a 10/1000 µs waveform, which corresponds to Level 3 (1 kV/500 A) of IEC 61000-4-5 when properly mounted on 5.0 mm × 5.0 mm copper pads per Vishay's recommended layout. Its low clamping voltage of 19.9 V ensures protected circuits remain within safe operating limits during such events.
How does the HE3 suffix affect SMBJ12CAHE3_B/H's qualification status?
The HE3 suffix indicates SMBJ12CAHE3_B/H is RoHS-compliant and AEC-Q101 qualified - verified for automotive applications including temperature cycling, mechanical shock, and humidity testing. This certification validates its use in engine compartments, ADAS sensors, and other automotive subsystems where long-term reliability under harsh conditions is mandatory.
What is the maximum operating temperature for SMBJ12CAHE3_B/H?
SMBJ12CAHE3_B/H has a maximum junction temperature (TJ max.) of +150 °C, allowing reliable operation in high-ambient environments such as under-hood automotive electronics or sealed industrial enclosures. Derating curves in the datasheet show usable power dissipation down to ~2.5 W at 100 °C ambient when mounted per standard pad layout.
Does SMBJ12CAHE3_B/H require polarity-aware PCB layout?
No - SMBJ12CAHE3_B/H is a bidirectional TVS diode with no polarity marking on the SMB package, so PCB layout does not require orientation alignment. Both terminals are functionally identical, simplifying placement on differential pairs, transformer-coupled lines, or any floating node where transient direction is unpredictable.
SMBJ12CAHE3_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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 30.2A
- 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)
SMBJ12CAHE3_B/H FAQ
1.How can I place an order for SMBJ12CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ12CAHE3_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 SMBJ12CAHE3_B/H reliable?
The price and inventory of SMBJ12CAHE3_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 SMBJ12CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ12CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ12CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ12CAHE3_B/H?
SMBJ12CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ12CAHE3_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 SMBJ12CAHE3_B/H?
For technical support, including SMBJ12CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ12CAHE3_B/H requirements.
6.How does Aetrix verify that SMBJ12CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ12CAHE3_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 SMBJ12CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ12CAHE3_B/H?
All SMBJ12CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ12CAHE3_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 SMBJ12CAHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ12CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ12CAHE3_B/H Tags
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