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Taiwan Semiconductor Corporation SMB10J33AH
- Part No.:
- SMB10J33AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J33AH.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,788
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Product details
Overview
SMB10J33AH from Taiwan Semiconductor is a unidirectional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 33V standoff voltage (VWM), 36.7–40.6V breakdown voltage (VBR @ 1mA), and 53.3V clamping voltage (VC @ 18.8A). It delivers AEC-Q101 qualification and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and inductive switching protection.
For engineers reviewing the SMB10J33AH datasheet, SMB10J33AH pinout, SMB10J33AH application, or SMB10J33AH equivalent, key selection criteria include clamping performance at 18.8A peak pulse current, unidirectional polarity marking, thermal resistance (RθJL = 20°C/W), and compliance with automotive transients and RoHS/halogen-free requirements.
Technical Context
This TVS diode uses a glass-passivated junction for stable breakdown behavior and fast response (<1.0ps), enabling effective suppression of ESD and electrical fast transients before sensitive ICs are damaged. Its unidirectional configuration provides reverse-biased clamping only, with forward voltage of 3.5V at 50A.
The device operates across –55°C to +175°C junction temperature range and is rated for 1000W non-repetitive peak pulse power (tp = 1ms). Thermal derating follows Fig. 2, and clamping waveform conforms to 10/1000μs standard per IEC 61000-4-5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 36.7 V / 40.6 V @ 1 mA - Confirmed breakdown threshold range for reliable turn-on margin |
| VC @ IPPM | 53.3 V @ 18.8 A - Clamped voltage during 1000W transient, limiting stress on downstream circuitry |
| PPK | 1000 W - Peak pulse power handling per 1ms 10/1000μs waveform, critical for load-dump immunity |
| TJ max | +175 °C - Enables under-hood automotive placement without thermal derating penalties |
| RθJL | 20 °C/W - Low junction-to-lead thermal resistance supports high-power pulse dissipation into PCB copper |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, low-profile, matte tin-plated leads, polarity indicated by cathode band. Weight: 0.110 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side in unidirectional clamp configuration; conducts during forward surge (e.g., reverse battery) |
| Cathode | Clamping terminal | Marked band identifies cathode; reverse-biased during transient events to clamp voltage to VC |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Glass-passivated junction | Ensures stable VBR over lifetime and improved moisture resistance vs. epoxy-passivated alternatives |
| ISO 7637-2 compliance | Guarantees immunity to standardized automotive transients (Pulse 1, 2a, 2b, 3a, 3b) without external filtering |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking-reduces manufacturing overhead and floor-life constraints |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives for environmentally compliant end-product certification |
Applications
| Automotive Lighting Systems | Engine Control Unit (ECU) Protection |
|---|---|
Use Scenario: LED headlamp drivers exposed to load-dump pulses during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS placed across power input to absorb 1000W transients before they reach DC-DC controllers and LED drivers. Use Value: Limits clamped voltage to 53.3V, preventing overvoltage damage to 36V-rated buck regulators and maintaining system uptime. | Use Scenario: ECU power rail subjected to inductive switching spikes from fuel injector solenoids. IC Role / Device Role / Timing Role: Primary transient suppressor on 12V main supply rail, triggered within <1ps to clamp energy before MCU I/O or CAN transceivers are stressed. Use Value: Withstands 100A surge (IFSM) and maintains clamping integrity across –40°C to +125°C ambient, supporting ASIL-B functional safety domains. |
| Infotainment Power Supply | Body Control Module (BCM) Inputs |
Use Scenario: USB-C PD and display power rails in center-stack units encountering ESD and conducted noise. IC Role / Device Role / Timing Role: Secondary-level protection downstream of primary fuses, suppressing fast transients that bypass bulk capacitance. Use Value: Fast response (<1ps) and low leakage (<1µA @ 33V) preserve standby current budget while ensuring signal integrity on 5V/12V rails. | Use Scenario: LIN bus and sensor inputs in BCM exposed to cable discharge events and relay bounce. IC Role / Device Role / Timing Role: Point-of-entry protection on low-voltage (5V/12V) sensor lines, shunting ESD to ground before signal conditioning amplifiers. Use Value: 53.3V clamping ensures protected nodes remain below absolute maximum ratings of automotive-grade op-amps and ADC front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | Same DO-214AA package; 33V VWM, but 53.3V VC @ 18.7A - nearly identical clamping performance | No AEC-Q101 qualification; not validated for automotive temperature cycling or humidity testing | Preferred for industrial or consumer designs where automotive qualification is not required |
| 1.5SMC33A | Higher PPK (1500W), same VWM/VC specs, but larger DO-214AB (SMC) package - 2.5mm wider body | Requires PCB layout change; unsuitable for space-constrained automotive modules | Select when higher single-pulse energy absorption is needed and board area permits larger footprint |
Compared with SMBJ33A and 1.5SMC33A, SMB10J33AH uniquely combines AEC-Q101 qualification, DO-214AA form factor, and 1000W pulse rating-making it the only drop-in solution for automotive Tier-1 power rail protection where qualification, size, and performance are simultaneously constrained.
Availability
SMB10J33AH is available at Aetrix Electronics and suitable for automotive lighting systems, engine control units, infotainment power supplies, and body control module inputs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMB10J33AH 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, MOSFETs, and automotive-qualified components.
The SMB10JxxAH series was designed specifically for AEC-Q101-compliant transient suppression in 12V/24V automotive subsystems, emphasizing low-profile packaging, high surge robustness, and seamless integration into automated SMT lines.
FAQ
What is the clamping voltage of SMB10J33AH and how is it measured?
The SMB10J33AH has a maximum clamping voltage (VC) of 53.3 V at 18.8 A peak pulse current, tested using the standardized 10/1000 μs waveform per IEC 61000-4-5. This value represents the upper limit of voltage seen by protected circuitry during a full 1000W transient event, and is confirmed in the Electrical Specifications table on page 2 of the official TSC datasheet revision A2102.
Is SMB10J33AH suitable for bidirectional transient protection?
No - SMB10J33AH is unidirectional. For bidirectional operation, the designated variant is SMB10J33CAH (with "CAH" suffix), which features symmetrical clamping in both polarities. The "AH" suffix explicitly denotes unidirectional configuration, and its cathode band marking must be oriented toward the protected line's higher potential side.
Does SMB10J33AH require special PCB layout considerations?
Yes - to achieve rated 1000W pulse performance, the SMB10J33AH requires minimum 10 mm² of 2-oz copper pour connected directly to each pad, per TSC's thermal design guidelines. The suggested pad layout in the Package Outline Dimensions drawing (page 4) specifies 2.5 × 5.5 mm pads with 1.5 mm spacing; narrower traces or insufficient copper will cause premature thermal failure during repetitive surges.
What is the maximum steady-state power dissipation for SMB10J33AH?
The SMB10J33AH has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C, as specified in the Absolute Maximum Ratings table. This value applies only to continuous DC or low-frequency reverse leakage conditions - transient suppression relies on short-duration pulse ratings (PPK = 1000 W), not steady-state limits.
How does SMB10J33AH meet automotive environmental requirements?
SMB10J33AH meets AEC-Q101 stress test requirements including HTGB, HTRB, temperature cycling, and mechanical shock, and complies with ISO 7637-2 Pulse 1/2a/2b/3a/3b for conducted transients. Its moisture sensitivity level 1 (per J-STD-020) and halogen-free molding compound (IEC 61249-2-21) further support automotive manufacturing and end-use reliability.
SMB10J33AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMB10J
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 18.8A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J33AH FAQ
1.How can I place an order for SMB10J33AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J33AH 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 SMB10J33AH reliable?
The price and inventory of SMB10J33AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J33AH is usually 5 days.
3.What payment methods are accepted for SMB10J33AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J33AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J33AH?
SMB10J33AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J33AH 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 SMB10J33AH?
For technical support, including SMB10J33AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J33AH requirements.
6.How does Aetrix verify that SMB10J33AH is sourced from the original manufacturer or authorized distributors?
All SMB10J33AH 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 SMB10J33AH meets industry standards.
7.What is the process for return or replacement of SMB10J33AH?
All SMB10J33AH units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J33AH, 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 SMB10J33AH part is unused and in its original packaging.
Return procedure for SMB10J33AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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