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Taiwan Semiconductor Corporation SMBJ10CAH
- Part No.:
- SMBJ10CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ10CAH.pdf
- Description:
- TVS DIODE 10VWM 17VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,423
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Product details
Overview
SMBJ10CAH from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for automotive-grade ESD and surge protection. It features a 10 V working stand-off voltage (VWM), 12.3 V minimum breakdown voltage (VBR), 17.0 V maximum clamping voltage (VC) at 37 A peak pulse current, and 600 W peak pulse power rating - deployed in CAN bus interfaces, automotive lighting control modules, and infotainment power rails.
For engineers reviewing the SMBJ10CAH datasheet, SMBJ10CAH pinout, SMBJ10CAH application, or SMBJ10CAH equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1 µA @ 10 V), and DO-214AA thermal performance (RθJA = 55 °C/W).
Technical Context
SMBJ10CAH is a unidirectional-capable but explicitly configured bidirectional TVS device (denoted by "CAH" suffix), with symmetrical breakdown and clamping behavior in both polarities. Its glass-passivated junction ensures stable VBR tolerance (min/max 11.1 V / 12.3 V at 1 mA test current) and fast response (<1.0 ps), enabling suppression of EFT bursts and load-dump transients before sensitive ICs are damaged.
The device operates across –55 °C to +150 °C junction temperature range and meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1. Its 10 °C/W junction-to-case thermal resistance supports reliable power dissipation during repetitive surge events in constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse voltage before significant leakage; sets operating margin below system rail. |
| VBR (min/max) | 11.1 V / 12.3 V @ 1 mA - Confirmed symmetric breakdown threshold in both directions; ensures predictable turn-on. |
| VC @ IPP | 17.0 V @ 37 A - Clamping voltage under 10/1000 µs surge; limits downstream IC stress to safe levels. |
| PPK | 600 W - Peak pulse power handling per single 10/1000 µs event; validated per ANSI/IEEE C62.35. |
| ID @ VWM | <1 µA - Ultra-low leakage at rated stand-off; avoids parasitic loading on low-power sensor lines. |
| TJ max | +150 °C - Enables placement near heat-generating components (e.g., power MOSFETs, DC-DC converters). |
| RθJA | 55 °C/W - Thermal resistance defines board-level derating; requires ≥25 mm² copper pour for full 600 W rating. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with cathode band omitted (symmetrical terminals). Matte tin-plated leads, RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Transient return path (bidirectional) | Connects to protected line; conducts surge current equally in either polarity. |
| Cathode (Terminal 2) | Transient return path (bidirectional) | Electrically identical to Terminal 1; no polarity marking required for CAH variant. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood and cabin applications per stress test requirements (HTOL, TCT, HAST). |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect/load dump), and Pulse 3a/3b (EFT) without degradation. |
| Glass passivated junction | Ensures long-term VBR stability and low parameter drift over 15+ year automotive service life. |
| Fast response time | <1.0 ps - Activates before most microsecond-scale transients propagate into IC pins. |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement prior to reflow; compatible with standard SMT assembly lines. |
Applications
| Automotive CAN Bus Protection | LED Headlamp Driver Protection |
|---|---|
Use Scenario: Protects CAN_H/CAN_L differential pair against battery load dump (Pulse 2b) and ESD events during connector mating. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed directly at connector entry point, shunting surge energy to chassis ground. Use Value: Maintains CAN signal integrity by limiting differential voltage to ≤17.0 V during 37 A transients, preventing PHY layer latch-up. | Use Scenario: Shields constant-current LED driver ICs from inductive kickback when high-side MOSFET switches off 2 A headlamp loads. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver output, clamping flyback spikes before they reach IC drain pin. Use Value: Prevents driver IC destruction by limiting transient voltage to 17.0 V, well below its 40 V absolute maximum rating. |
| Infotainment Power Rail Protection | Body Control Module (BCM) Sensor Interface |
Use Scenario: Guards 5 V/3.3 V power rails feeding MCU, audio codec, and display drivers against coupled surges from adjacent motor circuits. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS placed upstream of LDO input, minimizing quiescent current impact. Use Value: Enables robust operation in stop-start vehicles where repeated 12 V battery transients occur without degrading sleep-mode current budget. | Use Scenario: Protects LIN bus transceivers and analog sensor inputs (e.g., ambient light, rain sensor) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional TVS mounted at connector, referenced to local sensor ground to avoid ground loop injection. Use Value: Ensures sensor accuracy remains unaffected by ±8 kV contact ESD (IEC 61000-4-2) due to sub-1 ps response and symmetrical clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ10CA | Same VWM/VBR/VC specs; not AEC-Q101 qualified; no ISO 7637-2 validation. | Restricted to industrial/commercial use only; unsuitable for automotive OEM designs. | Select SMBJ10CAH when automotive qualification and standardized surge immunity are mandatory. |
| SAC10CA | Same DO-214AA package; lower PPK (400 W); higher VC (19.0 V @ 25 A); no AEC-Q101 or ISO 7637-2 documentation. | Limited to cost-sensitive consumer electronics with less stringent surge requirements. | Choose SMBJ10CAH for full 600 W capability and documented automotive compliance where system reliability is critical. |
Compared with SMBJ10CA and SAC10CA, SMBJ10CAH delivers verified AEC-Q101 reliability, ISO 7637-2 immunity, and 600 W surge capacity - making it the only option qualified for front-end automotive electronics requiring zero field failures under real-world electrical stress.
Availability
SMBJ10CAH is available at Aetrix Electronics and suitable for automotive electronics, LED lighting systems, and industrial control panels requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for SMBJ10CAH 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers since 1979.
The SMBJH series was engineered specifically for automotive-grade transient protection, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and robust thermal performance in compact DO-214AA packages.
FAQ
What does the "CAH" suffix indicate in SMBJ10CAH?
The "CAH" suffix in SMBJ10CAH denotes a bidirectional TVS diode with AEC-Q101 qualification and halogen-free construction. Unlike unidirectional variants (e.g., SMBJ10H), SMBJ10CAH provides symmetrical clamping in both polarities - essential for protecting differential buses like CAN or LIN where voltage reversals occur during normal operation or fault conditions.
Is SMBJ10CAH suitable for protecting a 12 V automotive power rail?
Yes, SMBJ10CAH is specifically designed for 12 V automotive systems. Its 10 V working stand-off voltage (VWM) provides adequate margin below nominal 12 V, while its 17.0 V clamping voltage (VC) ensures downstream ICs remain within safe operating limits during ISO 7637-2 Pulse 2b (load dump) events. The device's +150 °C junction rating supports under-hood deployment.
How does SMBJ10CAH differ from SMBJ10AH?
SMBJ10CAH is bidirectional and AEC-Q101 qualified; SMBJ10AH is unidirectional and lacks automotive qualification. SMBJ10CAH has symmetrical VBR and VC in both directions, whereas SMBJ10AH clamps only in reverse bias and conducts forward current up to 100 A IFSM. Use SMBJ10CAH for differential or AC-coupled signal lines; SMBJ10AH for DC power rail protection with polarity-defined grounding.
What is the maximum peak pulse current SMBJ10CAH can handle?
SMBJ10CAH handles a maximum peak impulse current (IPP) of 37 A under the standard 10/1000 µs waveform. This value is derived from its 600 W peak pulse power rating and 17.0 V clamping voltage (IPP = PPK / VC). Derating applies above 25 °C ambient per Figure 2 in the datasheet, with usable IPP dropping to ~28 A at 85 °C ambient.
Does SMBJ10CAH require special PCB layout considerations?
Yes - to achieve full 600 W surge capability, SMBJ10CAH requires minimum 25 mm² copper area connected to both terminals for thermal dissipation. Keep traces short and wide (<5 mm length, ≥0.5 mm width), place the device within 5 mm of the protected connector, and reference its ground pad directly to chassis ground - not signal ground - to avoid coupling noise into sensitive circuits.
SMBJ10CAH 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):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 37A
- 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)
SMBJ10CAH FAQ
1.How can I place an order for SMBJ10CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ10CAH 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 SMBJ10CAH reliable?
The price and inventory of SMBJ10CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ10CAH is usually 5 days.
3.What payment methods are accepted for SMBJ10CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ10CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ10CAH?
SMBJ10CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ10CAH 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 SMBJ10CAH?
For technical support, including SMBJ10CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ10CAH requirements.
6.How does Aetrix verify that SMBJ10CAH is sourced from the original manufacturer or authorized distributors?
All SMBJ10CAH 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 SMBJ10CAH meets industry standards.
7.What is the process for return or replacement of SMBJ10CAH?
All SMBJ10CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ10CAH, 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 SMBJ10CAH part is unused and in its original packaging.
Return procedure for SMBJ10CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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