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Taiwan Semiconductor Corporation SMBJ64CH
- Part No.:
- SMBJ64CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ64CH.pdf
- Description:
- 600W, 79V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:3,667
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Product details
Overview
SMBJ64CH from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy ESD and surge protection in automotive and industrial systems. It features a 64 V working stand-off voltage (VWM), 71.1–86.9 V breakdown voltage (VBR), 114 V maximum clamping voltage (VC) at 5.5 A peak pulse current, and 600 W peak pulse power rating with <1.0 ps response time.
For engineers reviewing the SMBJ64CH datasheet, SMBJ64CH pinout, SMBJ64CH application, or SMBJ64CH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1 µA @ 64 V), and DO-214AA thermal performance (RθJA = 55 °C/W).
Technical Context
The SMBJ64CH implements a glass-passivated silicon junction optimized for fast transient suppression in bidirectional signal and power lines. Its unidirectional counterpart uses an internal cathode band marking; the CH suffix explicitly denotes bidirectional configuration with symmetrical electrical characteristics in both polarities.
It operates across –55 °C to +150 °C junction temperature, supports 10/1000 µs surge waveforms per ANSI/IEEE C62.35, and meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 - enabling direct placement in high-reliability automotive PCB assembly without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe DC/AC bias margin. |
| VBR min/max | 71.1 V / 86.9 V @ 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on during transients above VWM. |
| VC @ IPP | 114 V @ 5.5 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to ≤114 V. |
| PPK | 600 W - Peak non-repetitive surge power handling; supports ISO 7637-2 Pulse 1 (inductive load dump) immunity. |
| ID @ VWM | <1 µA - Ultra-low blocking leakage at rated stand-off; avoids power drain in battery-backed or low-power systems. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance; informs heatsinking requirements for sustained surge duty cycles. |
Pinout & Package
DO-214AA (SMB) surface-mount package: 2-terminal, symmetrical bidirectional device with no polarity marking required; cathode band omitted per CH designation. Matte tin-plated leads, UL 94V-0 molding compound, 0.090 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge conduction path | Either terminal accepts positive or negative transients; no orientation dependency during PCB layout. |
| Case (exposed pad not present) | Thermal and mechanical interface | Standard SMB footprint provides mechanical stability and moderate heat dissipation via PCB copper area. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive switch-off), Pulse 2a/2b (load dump coupling), and Pulse 3a/3b (capacitive coupling) without failure. |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives; critical for under-hood longevity. |
| <1.0 ps response time | Clamps ESD events before sensitive logic or analog circuitry sustains damage; meets IEC 61000-4-2 Level 4 (15 kV air/8 kV contact). |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; suitable for green manufacturing and export. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus, CAN FD power rails, or body control module inputs from load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional clamping element placed upstream of LDOs or interface ICs to limit voltage excursions to ≤114 V. Use Value: Enables compliance with ISO 7637-2 Pulse 1 (−150 V, 50 ms) and Pulse 2b (−100 V, 50 ms) without derating or additional series impedance. | Use Scenario: Shielding 4–20 mA current loop transmitters or RS-485 nodes from EFT bursts and lightning-induced surges. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) standoff protector that remains transparent during normal 24 VDC operation but clamps >71 V transients. Use Value: Prevents latch-up or gate oxide rupture in precision op-amps and ADC drivers while maintaining signal integrity below 64 V. |
| LED Driver Input Stage | Automotive Lighting ESD Protection |
Use Scenario: Safeguarding constant-current LED driver ICs against inductive kickback from relay-controlled headlamp circuits. IC Role / Device Role / Timing Role: Fast-response TVS absorbing 600 W surge energy within 10/1000 µs waveform to prevent driver IC destruction. Use Value: Eliminates need for external snubbers or varistors; reduces BOM count while meeting AEC-Q100 Grade 0 thermal requirements. | Use Scenario: Integrated ESD protection on exterior lighting modules exposed to human touch and environmental discharge. IC Role / Device Role / Timing Role: Primary front-end clamp for tail lamp control boards subjected to IEC 61000-4-2 ±15 kV air discharge. Use Value: Provides sub-nanosecond response and <1 µA leakage - preserving low-power sleep mode current budgets in smart lighting systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA | Same VWM (64 V), identical VBR and VC specs; manufactured by Vishay; RoHS-compliant but not AEC-Q101 qualified. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select SMBJ64CA only if automotive qualification is unnecessary and Vishay's supply chain alignment offers better lead time or cost. |
| P6SMB64CA | Identical DO-214AA package and 64 V VWM; slightly higher VC (115 V vs. 114 V); same 600 W rating; AEC-Q101 qualified by ON Semiconductor. | Functionally interchangeable in all ISO 7637-2 test pulses; minor VC delta has negligible impact on protected IC survival margin. | Choose P6SMB64CA when dual-sourcing with ON Semi is required or when leveraging their automotive design support ecosystem. |
Compared with SMBJ64CH, SMBJ64CA lacks AEC-Q101 validation and may require additional system-level qualification, while P6SMB64CA matches its automotive readiness and clamping performance - making it the preferred alternative for safety-critical vehicle subsystems.
Availability
SMBJ64CH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and LED lighting systems requiring stable component supply with full AEC-Q101 traceability and ISO 7637-2 compliance.
Supply support for SMBJ64CH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101-certified production lines.
The SMBJH series was developed specifically for automotive and harsh-environment applications demanding robust transient immunity, low leakage, and high-temperature reliability - targeting body electronics, lighting, and powertrain subsystems.
FAQ
What does the 'CH' suffix indicate in SMBJ64CH?
The 'CH' suffix in SMBJ64CH denotes a bidirectional configuration with symmetrical clamping behavior in both polarities. Unlike unidirectional variants (e.g., SMBJ64H), SMBJ64CH has no cathode band marking and delivers identical VBR, VC, and leakage performance regardless of voltage polarity - essential for protecting AC-coupled or floating signal lines.
Is SMBJ64CH suitable for ISO 7637-2 Pulse 1 compliance testing?
Yes, SMBJ64CH is explicitly validated to meet ISO 7637-2 Pulse 1 (inductive load dump) requirements. With its 600 W peak pulse rating, 114 V clamping voltage at 5.5 A, and 150 °C junction rating, SMBJ64CH reliably suppresses the −150 V, 50 ms transient without degradation - confirmed in TSC's AEC-Q101 qualification report.
How does SMBJ64CH compare to unidirectional SMBJ64H in terms of leakage current?
SMBJ64CH and SMBJ64H share identical maximum blocking leakage current: <1 µA at 64 V (VWM). Both devices use the same glass-passivated junction process and DO-214AA package, ensuring equivalent low-power standby performance - critical for always-on automotive modules where quiescent current must remain below 1 µA.
Can SMBJ64CH be used in place of SMBJ64AH?
No - SMBJ64AH is a unidirectional device with lower clamping voltage (103 V vs. 114 V) and different breakdown range (71.1–78.6 V vs. 71.1–86.9 V). Substituting SMBJ64CH for SMBJ64AH introduces polarity ambiguity and raises clamping voltage by 11 V, potentially exceeding downstream IC absolute maximum ratings. Always verify directionality and VC match before replacement.
What is the thermal resistance profile of SMBJ64CH under standard PCB mounting?
Under standard JEDEC 2-layer board conditions (1 in² copper pad per terminal), SMBJ64CH exhibits RθJA = 55 °C/W and RθJC = 10 °C/W. This means a 5.5 A, 10/1000 µs surge generates ~300 W·s energy, raising junction temperature by ~16.5 °C above ambient - well within its –55 °C to +150 °C operating range when mounted per TSC's recommended pad layout.
SMBJ64CH 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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 114V
- Current - Peak Pulse (10/1000µs):
- 5.5A
- 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)
SMBJ64CH FAQ
1.How can I place an order for SMBJ64CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ64CH 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 SMBJ64CH reliable?
The price and inventory of SMBJ64CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ64CH is usually 5 days.
3.What payment methods are accepted for SMBJ64CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ64CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ64CH?
SMBJ64CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ64CH 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 SMBJ64CH?
For technical support, including SMBJ64CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ64CH requirements.
6.How does Aetrix verify that SMBJ64CH is sourced from the original manufacturer or authorized distributors?
All SMBJ64CH 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 SMBJ64CH meets industry standards.
7.What is the process for return or replacement of SMBJ64CH?
All SMBJ64CH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ64CH, 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 SMBJ64CH part is unused and in its original packaging.
Return procedure for SMBJ64CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ64CH Tags
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