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Taiwan Semiconductor Corporation SMBJ6.5AH
- Part No.:
- SMBJ6.5AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ6.5AH.pdf
- Description:
- 600W, 7.6V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,376
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Product details
Overview
SMBJ6.5AH from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for automotive-grade ESD and surge protection. It features a 6.5V working stand-off voltage (VWM), 7.22–7.98V breakdown voltage (VBR), 11.2V clamping voltage at 500A peak pulse current (VC@IPP), and AEC-Q101 qualification for under-hood electronics.
For engineers reviewing the SMBJ6.5AH datasheet, SMBJ6.5AH pinout, SMBJ6.5AH application, or SMBJ6.5AH equivalent, key selection criteria include its 11.2V clamping performance at 500A, <1μA leakage at 6.5V, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and suitability for 12V automotive power rail protection in ADAS sensors and body control modules.
Technical Context
The SMBJ6.5AH operates as a unidirectional avalanche diode with glass-passivated junction and fast response time (<1.0 ps). Its thermal design supports 150°C max junction temperature, 10°C/W junction-to-case resistance (RθJC), and 55°C/W junction-to-ambient resistance (RθJA), enabling reliable operation in high-temperature engine bay environments.
It delivers 600W non-repetitive peak pulse power (10/1000µs waveform), withstands 100A forward surge current (8.3ms half-sine), and maintains ≤3.5V forward voltage at 50A - critical for minimizing conduction loss during sustained overvoltage events in 12V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse operating voltage before clamping begins; sets threshold for 12V automotive system protection. |
| VBR min/max | 7.22 / 7.98 V @ 10 mA - Confirmed breakdown range ensures consistent turn-on behavior across production lots. |
| VC@IPP | 11.2 V @ 500 A - Clamping voltage limits downstream IC stress during ISO 7637-2 Pulse 3b transients. |
| ID@VWM | <1 µA - Ultra-low leakage preserves battery life in always-on vehicle networks (e.g., CAN FD wake-up circuits). |
| PPK | 600 W - Peak pulse power rating defines maximum transient energy absorption capability per IEC 61000-4-5. |
| TJ max | +150 °C - Enables placement near heat sources such as power converters or motor drivers without derating. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, matte tin-plated leads, polarity indicated by cathode band. Weight: 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; forms clamping loop with cathode. |
| Cathode | Protected line input | Connected to protected 12V rail; conducts avalanche current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock per JESD47. |
| Glass passivated junction | Enhances long-term reliability and moisture resistance in under-hood condensation environments. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) immunity requirements. |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking; eliminates production delays and moisture-related popcorning. |
Applications
| Automotive Body Control Module (BCM) | ADAS Camera Power Input Protection |
|---|---|
Use Scenario: Protects microcontroller I/O and LIN bus transceivers from load dump and alternator ripple in door module PCBs. IC Role / Device Role: Unidirectional TVS placed between 12V supply rail and ground, upstream of DC-DC converter input. Use Value: Limits clamped voltage to 11.2V during 500A transients, preventing latch-up in 16V-rated LDOs and ensuring ASIL-B functional safety compliance. |
Use Scenario: Shields image sensor and serializer ICs from ESD and cable discharge events on FAKRA coaxial power lines. IC Role / Device Role: Standoff protection device on 12V camera power input, paired with common-mode choke and RC filter. Use Value: Sub-1μA leakage avoids phantom drain in parked vehicle mode; 11.2V clamping preserves 12V-rated serializer ICs during ISO 10605 contact discharge. |
| Engine Control Unit (ECU) Sensor Interface | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: Guards crankshaft/camshaft position sensor signal conditioning circuitry against ignition coil switching noise. IC Role / Device Role: Bidirectional-capable variant not used; SMBJ6.5AH applied as unidirectional clamp on regulated 5V sensor supply rail. Use Value: 7.22–7.98V VBR ensures stable clamping margin above 5V rail while rejecting normal ripple up to ±10%. |
Use Scenario: Suppresses inductive kickback from H-bridge MOSFETs during PWM commutation in 12V EPS motor drivers. IC Role / Device Role: Parallel-mounted across bulk capacitor on 12V input stage to absorb repetitive 600W surges. Use Value: 600W PPK rating sustains repeated 10/1000µs pulses without degradation; RθJC = 10°C/W enables direct thermal coupling to copper pour. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ6.5A | Same DO-214AC (SMA) package; 11.2V VC@IPP but 400W PPK rating; higher RθJA (70°C/W). | Lower power handling limits use in high-duty-cycle automotive transients; less suitable for EPS or BCM load-dump scenarios. | Select only if board space constraints require SMA footprint and peak surge energy remains below 400W. |
| Vishay SMA6J6.5A | DO-214AC (SMA); 11.2V VC@IPP; AEC-Q101 qualified; 600W PPK but 1000A IPP rating implies different test condition (8/20µs vs. 10/1000µs). | Higher IPP suggests superior single-pulse robustness but may misrepresent real-world 10/1000µs load-dump performance. | Verify clamping curve alignment with ISO 7637-2 Pulse 1 waveform before substituting in safety-critical ECUs. |
Compared with SMAJ6.5A and SMA6J6.5A, the SMBJ6.5AH offers identical clamping voltage but superior thermal performance (RθJC = 10°C/W) and guaranteed 10/1000µs waveform compliance - making it preferred for thermally constrained, high-reliability automotive placements where sustained surge duty cycles occur.
Availability
SMBJ6.5AH is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom power supply designs requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMBJ6.5AH 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, specializing in TVS diodes, rectifiers, and automotive-qualified components since 1979.
The SMBJH series was developed specifically for AEC-Q101-compliant automotive transient suppression, targeting 12V/24V power rails in ECUs, ADAS, and body electronics where high clamping accuracy and thermal resilience are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ6.5AH under standard test conditions?
The SMBJ6.5AH has a maximum clamping voltage (VC) of 11.2 V when subjected to a 500 A peak impulse current with a 10/1000 µs waveform at TA = 25°C. This value is measured per ANSI/IEEE C62.35 and confirmed in Taiwan Semiconductor's official SMBJH series datasheet revision A2102. The SMBJ6.5AH maintains this clamping performance across its specified operating temperature range.
Is SMBJ6.5AH suitable for bidirectional transient protection?
No, SMBJ6.5AH is a unidirectional TVS diode intended for DC rail protection with defined polarity (cathode to protected line). For bidirectional applications, Taiwan Semiconductor specifies variants with "CH" or "CAH" suffixes (e.g., SMBJ6.5CH). Using SMBJ6.5AH in AC or bipolar signal paths would result in forward conduction during negative excursions and potential failure.
Does SMBJ6.5AH meet ISO 7637-2 Pulse 1 requirements for automotive load dump?
Yes, SMBJ6.5AH is explicitly rated to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. Its 600W peak pulse power rating and 11.2V clamping voltage at 500A ensure compliance with the 12V system load dump profile (Pulse 1: −150V, 50ms, Ri = 10Ω), provided proper PCB layout and grounding are implemented per Taiwan Semiconductor's application guidelines.
What is the leakage current specification for SMBJ6.5AH at its working voltage?
The SMBJ6.5AH exhibits a maximum blocking leakage current (ID) of 1 µA when biased at its 6.5 V working stand-off voltage (VWM) and tested at TA = 25°C. This ultra-low leakage is critical for battery-sensitive automotive applications such as always-on telematics modules and ensures minimal parasitic drain over extended vehicle idle periods.
Can SMBJ6.5AH be used in reflow soldering processes without preconditioning?
Yes, SMBJ6.5AH carries Moisture Sensitivity Level (MSL) 1 per J-STD-020, meaning it can be subjected to standard lead-free reflow profiles (peak 260°C) without prior baking. Its DO-214AA (SMB) package uses moisture-resistant molding compound and matte tin-plated leads compliant with J-STD-002, eliminating MSL handling overhead in high-volume SMT lines.
SMBJ6.5AH 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 56A
- 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)
SMBJ6.5AH FAQ
1.How can I place an order for SMBJ6.5AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ6.5AH 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 SMBJ6.5AH reliable?
The price and inventory of SMBJ6.5AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ6.5AH is usually 5 days.
3.What payment methods are accepted for SMBJ6.5AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ6.5AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ6.5AH?
SMBJ6.5AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ6.5AH 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 SMBJ6.5AH?
For technical support, including SMBJ6.5AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ6.5AH requirements.
6.How does Aetrix verify that SMBJ6.5AH is sourced from the original manufacturer or authorized distributors?
All SMBJ6.5AH 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 SMBJ6.5AH meets industry standards.
7.What is the process for return or replacement of SMBJ6.5AH?
All SMBJ6.5AH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ6.5AH, 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 SMBJ6.5AH part is unused and in its original packaging.
Return procedure for SMBJ6.5AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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