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Taiwan Semiconductor Corporation SMBJ6.5CH
- Part No.:
- SMBJ6.5CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ6.5CH.pdf
- Description:
- 600W, 8V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,877
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Product details
Overview
SMBJ6.5CH from Taiwan Semiconductor is a unidirectional transient voltage suppressor diode (TVS) designed for automotive-grade circuit protection in DC power rails and signal lines. It features a 6.5V working stand-off voltage (VWM), 7.22–8.82V breakdown voltage (VBR), 12.3V clamping voltage (VC) at 500A peak pulse current, and 600W peak pulse power rating per 10/1000µs waveform - deployed in engine control units and body electronics to absorb load dump and ESD transients.
For engineers reviewing the SMBJ6.5CH datasheet, SMBJ6.5CH pinout, SMBJ6.5CH application, or SMBJ6.5CH equivalent, key selection criteria include its AEC-Q101 qualification, DO-214AA (SMB) surface-mount package, bidirectional marking compatibility (CH suffix), ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and sub-1ps response time - critical for robust automotive ECU protection design.
Technical Context
The SMBJ6.5CH operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast clamping of high-energy transients on 12V automotive systems. Its 10°C/W junction-to-case thermal resistance enables reliable power dissipation under repetitive surge conditions, while its <1μA leakage at 6.5V ensures minimal standby current impact.
Designed for bidirectional use via CH-suffix variant, SMBJ6.5CH maintains symmetrical electrical characteristics in both directions - unlike standard unidirectional SMBJ6.5H - enabling simplified layout for dual-polarity rail protection without polarity-sensitive placement. It meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous DC or RMS voltage the device blocks without conduction; sets minimum system operating margin before clamping. |
| VBR min/max | 7.22 V / 8.82 V @ 10 mA - Confirmed avalanche onset range; guarantees reliable triggering above nominal 12V rail during transients. |
| VC @ IPP | 12.3 V @ 500 A - Clamped voltage during 10/1000µs surge; limits downstream IC stress to safe levels in automotive load-dump events. |
| PPK | 600 W - Peak pulse power handling per standardized waveform; supports repeated ISO 7637-2 Pulse 5a (load dump) surges. |
| IR @ VWM | <1 µA - Ultra-low reverse leakage at rated stand-off; preserves battery life in always-on vehicle modules. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood environments up to 125°C ambient with derating. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, matte tin-plated leads, cathode band marked on case end. Weight: 0.090 g. UL 94V-0 compliant molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; defines clamping reference point for unidirectional operation. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., battery rail); conducts avalanche current toward ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood applications including temperature cycling, mechanical shock, and humidity testing per stress test plan. |
| Clamping response time <1 ps | Enables suppression of nanosecond-scale ESD events before sensitive CAN/LIN transceivers or microcontrollers are damaged. |
| ISO 7637-2 compliance | Guarantees survivability against standardized automotive transients: Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), Pulse 3a/3b (switching noise). |
| DO-214AA (SMB) footprint | Standardized 4.58 × 3.94 mm outline compatible with automated SMT placement and reflow profiles; supports high-volume automotive manufacturing. |
Applications
| Automotive Engine Control Unit (ECU) | LED Headlamp Driver Module |
|---|---|
Use Scenario: Protection of 12V supply rail against load dump (ISO 7637-2 Pulse 5a) and alternator ripple during ignition cycles. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤12.3 V during 600W surges, preventing overvoltage shutdown or latch-up in buck controller ICs. |
Use Scenario: Safeguarding constant-current LED driver ICs from ESD events during assembly and in-vehicle cable coupling. IC Role / Device Role / Timing Role: Bidirectional transient suppressor across LED string terminals (CH suffix enables polarity-agnostic placement). Use Value: Sub-1ps response captures human-body-model (HBM) ESD pulses before driver FET gate oxide breakdown occurs. |
| Body Control Module (BCM) LIN Bus | Infotainment System Power Input |
Use Scenario: Protecting LIN transceiver I/O pins from coupled transients on shared chassis-ground wiring harnesses. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS placed directly at transceiver VCC and LIN bus pins. Use Value: Maintains <1 µA standby current while clamping 100V/1A fast transients to ≤12.3 V - preserving sleep-mode integrity. |
Use Scenario: Input-stage surge protection for 5V/3.3V PMICs powering MCU, display, and audio subsystems. IC Role / Device Role / Timing Role: Primary clamping device upstream of input filter capacitor and LDO regulator. Use Value: 600W peak power rating absorbs multiple ISO 7637-2 Pulse 2b events without degradation - ensuring long-term BOM stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ6.5A | Unidirectional only; 10.3V clamping at 500A; 400W PPK rating; SMA package (larger footprint than SMB). | Lacks AEC-Q101 qualification and ISO 7637-2 Pulse 5a validation; suitable for industrial, not automotive, use. | Select when cost priority outweighs automotive compliance and space constraints allow SMA footprint. |
| Vishay SMF6.5A | Unidirectional; 11.2V clamping at 500A; 200W PPK; same DO-214AA package but lower surge rating. | Not rated for ISO 7637-2 Pulse 5a; limited to lower-energy transients like ESD and EFT. | Choose for non-automotive consumer electronics where 200W surge capacity suffices and AEC-Q101 is unnecessary. |
Compared with SMBJ6.5CH, SMAJ6.5A offers lower clamping but lacks automotive qualification and uses a larger package, while SMF6.5A provides identical footprint but only one-third the surge power handling - making SMBJ6.5CH the sole option meeting full AEC-Q101 + ISO 7637-2 + 600W requirements in DO-214AA.
Availability
SMBJ6.5CH is available at Aetrix Electronics and suitable for automotive engine control units, LED lighting drivers, body control modules, and infotainment power inputs requiring stable component supply across extended production lifecycles.
Supply support for SMBJ6.5CH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The SMBJH series was developed specifically for AEC-Q101-compliant transient protection in 12V/24V automotive power systems - emphasizing high surge robustness, ultra-fast response, and process reliability under thermal and mechanical stress.
FAQ
What does the 'CH' suffix indicate in SMBJ6.5CH?
The 'CH' suffix in SMBJ6.5CH denotes a bidirectional configuration - meaning the device functions identically in both forward and reverse bias, unlike the unidirectional 'H' version. This allows symmetric placement across differential lines or polarity-agnostic protection without requiring orientation verification during SMT assembly. SMBJ6.5CH retains all core specs of SMBJ6.5H, including 6.5V VWM and 12.3V VC, but supports bipolar transient suppression essential for LIN/CAN bus or sensor interface protection.
Is SMBJ6.5CH qualified for automotive under-hood applications?
Yes, SMBJ6.5CH is AEC-Q101 qualified and explicitly tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b standards - confirming suitability for under-hood environments up to +125°C ambient. Its 150°C maximum junction temperature, JESD201 Class 2 whisker resistance, and J-STD-020 Level 1 moisture sensitivity rating further validate its robustness in automotive powertrain and chassis modules where thermal cycling and vibration are severe.
What is the clamping voltage of SMBJ6.5CH at rated surge current?
The SMBJ6.5CH has a maximum clamping voltage (VC) of 12.3 V at 500 A peak impulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and represents the upper limit of voltage seen by downstream circuitry during worst-case transients - ensuring protected ICs such as MCUs or CAN transceivers remain within their absolute maximum ratings during load dump or ESD events.
Can SMBJ6.5CH replace SMBJ6.5AH in an existing design?
No - SMBJ6.5CH and SMBJ6.5AH are not interchangeable. SMBJ6.5CH is bidirectional with symmetrical VBR and VC in both directions, while SMBJ6.5AH is unidirectional with cathode-anode polarity dependence. Substituting SMBJ6.5CH for SMBJ6.5AH would eliminate polarity constraints but may alter circuit behavior in applications relying on DC blocking; layout review and functional validation are required before replacement.
What packaging and reel quantity is offered for SMBJ6.5CH?
SMBJ6.5CH is supplied in DO-214AA (SMB) package format on 3,000-piece tape-and-reel carriers, conforming to EIA-481 standards. The reel includes matte tin-plated leads compatible with standard SnPb and lead-free reflow profiles, and each unit is marked with the 'KH' code per TSC's ordering nomenclature - enabling full traceability and automated optical inspection during SMT placement.
SMBJ6.5CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJH
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 12.3V
- Current - Peak Pulse (10/1000µs):
- 51A
- 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 (SMB)
SMBJ6.5CH FAQ
1.How can I place an order for SMBJ6.5CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ6.5CH 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 SMBJ6.5CH reliable?
The price and inventory of SMBJ6.5CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ6.5CH is usually 5 days.
3.What payment methods are accepted for SMBJ6.5CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ6.5CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ6.5CH?
SMBJ6.5CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ6.5CH 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 SMBJ6.5CH?
For technical support, including SMBJ6.5CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ6.5CH requirements.
6.How does Aetrix verify that SMBJ6.5CH is sourced from the original manufacturer or authorized distributors?
All SMBJ6.5CH 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 SMBJ6.5CH meets industry standards.
7.What is the process for return or replacement of SMBJ6.5CH?
All SMBJ6.5CH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ6.5CH, 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 SMBJ6.5CH part is unused and in its original packaging.
Return procedure for SMBJ6.5CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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