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Taiwan Semiconductor Corporation SMBJ13A
- Part No.:
- SMBJ13A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ13A.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,002
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Product details
Overview
SMBJ13A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy ESD and surge protection in DC power rails and signal lines. It features a 13 V working stand-off voltage (VWM), 14.4–15.9 V breakdown voltage (VBR) at 1 mA, 21.5 V maximum clamping voltage (VC) at 29 A peak pulse current, and 600 W peak pulse power rating with <1.0 ps response time.
For engineers reviewing the SMBJ13A datasheet, SMBJ13A pinout, SMBJ13A application, or SMBJ13A equivalent, key selection criteria include clamping performance under IEC 61000-4-2/4-5, leakage current (<1 µA at 13 V), unidirectional polarity marking, and compatibility with automated SMT assembly on industrial and automotive PCBs.
Technical Context
The SMBJ13A operates as a silicon avalanche diode that remains non-conductive below its 13 V stand-off threshold and rapidly clamps transients above its 14.4–15.9 V breakdown range. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1 µA at VWM), while its 10 °C/W junction-to-case thermal resistance supports sustained surge handling in compact layouts.
It meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and inductive-switching immunity and complies with J-STD-020 moisture sensitivity level 1 - enabling reflow-compatible assembly without baking. The device is rated for -55 °C to +150 °C junction temperature and UL 94V-0 molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe DC rail margin. |
| VBR @ IT=1 mA | 14.4–15.9 V - Breakdown onset range; ensures reliable triggering above normal operating voltage with tight tolerance. |
| VC @ IPP=29 A | 21.5 V - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to ≤21.5 V at full rated current. |
| PPK | 600 W - Peak pulse power handling per 10/1000 µs waveform; supports robust protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | <1 µA - Ultra-low blocking leakage; minimizes standby power loss in battery-backed or low-power systems. |
| Response Time | <1.0 ps - Sub-nanosecond avalanche turn-on; captures fast ESD events (IEC 61000-4-2) before damage occurs. |
| TJ Max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or enclosed industrial enclosures. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode-banded unidirectional configuration. Matte tin-plated leads, RoHS and halogen-free compliant, weight ≈ 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to system ground or return path; forms clamping loop with cathode during transient conduction. |
| Cathode | High-side surge input terminal | Marked by band; connects to protected line (e.g., 12 V rail or CAN_H); conducts avalanche current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature, with minimal parameter drift during repeated surge events. |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive electronics protection against battery disconnect, alternator load dump, and inductive switching noise. |
| J-STD-020 Level 1 moisture sensitivity | Enables standard SMT reflow without pre-baking, reducing manufacturing complexity and cost. |
| UL 94V-0 flammability rating | Molding compound self-extinguishes under flame exposure - required for safety-critical industrial and transportation systems. |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and eliminates whisker growth risk per JESD 201 Class 2. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load dump and jump-start transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges before they reach PMIC or microcontroller LDOs. Use Value: Limits clamping voltage to 21.5 V at 29 A, protecting 16 V-rated downstream regulators and avoiding latch-up or oxide rupture. |
Use Scenario: 4–20 mA analog sensor loop in factory automation subject to ESD and cable-induced transients. IC Role / Device Role / Timing Role: Bidirectional protection not required; SMBJ13A used on supply side of 2-wire transmitter to absorb common-mode surges. Use Value: Sub-1 µA leakage preserves loop accuracy; 600 W rating handles multiple 1 kV/500 A surges without degradation. |
| LED Driver Input Protection | DC-DC Converter Input Stage |
Use Scenario: Constant-current LED driver board powered from 12 V vehicle bus, susceptible to ignition noise and ESD. IC Role / Device Role / Timing Role: Primary surge shunt on VIN rail upstream of buck controller; cathode tied to VIN, anode to GND. Use Value: 21.5 V clamping prevents overvoltage on controller enable pin and gate driver bootstrap circuitry during 10/1000 µs pulses. |
Use Scenario: 24 V input to isolated flyback converter in industrial PLC power supply. IC Role / Device Role / Timing Role: First-line defense on primary-side DC bus; absorbs energy from inductive kickback and lightning-induced surges. Use Value: 600 W peak power rating sustains repeated 10/1000 µs transients up to 29 A without thermal runaway or parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ13CA | Bidirectional version; symmetric VBR (14.4–15.9 V) in both polarities; same VWM, VC, and PPK ratings. | Required where AC-coupled or differential signals (e.g., RS-485, CAN) need protection in both directions. | Select SMBJ13CA only if bipolar clamping is needed; SMBJ13A is preferred for DC rails due to lower leakage and simpler layout. |
| SMCJ13A | Larger DO-214AB (SMC) package; identical electrical specs but higher thermal mass (RθJA = 35 °C/W vs. 55 °C/W) and 1500 W PPK rating. | Suitable for higher-energy environments (e.g., railway or heavy-industrial mains inputs) where 600 W is insufficient. | Choose SMBJ13A for space-constrained SMT designs; SMCJ13A only when board area allows and >600 W surge margin is mandatory. |
Compared with SMBJ13CA and SMCJ13A, the SMBJ13A offers optimal balance of compact DO-214AA footprint, 600 W surge capability, and ultra-low leakage - making it ideal for automotive body control modules and space-limited industrial sensors where unidirectional DC protection suffices.
Availability
SMBJ13A is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED driver inputs, and DC-DC converter front-end protection requiring stable component supply across extended temperature ranges and high-reliability production cycles.
Supply support for SMBJ13A 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 power management devices.
The SMBJ series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q200 readiness, ISO 7637-2 compliance, and automated SMT manufacturability.
FAQ
What is the maximum clamping voltage of SMBJ13A at its rated peak pulse current?
The SMBJ13A has a maximum clamping voltage (VC) of 21.5 V when subjected to its rated 29 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value is measured at TA = 25°C and guarantees that downstream circuitry sees no more than 21.5 V during worst-case surge events, preserving voltage margins for 24 V-tolerant ICs and regulators.
Is SMBJ13A suitable for bidirectional signal line protection such as RS-485 or CAN bus?
No - SMBJ13A is a unidirectional TVS diode intended for DC power rail protection. For bidirectional data lines like RS-485 or CAN, the SMBJ13CA variant must be used instead, as it provides symmetrical clamping in both polarities. Using SMBJ13A on AC-coupled or differential lines risks forward conduction and failure during negative transients.
Does SMBJ13A meet automotive qualification standards such as AEC-Q200?
While SMBJ13A is engineered to meet ISO 7637-2 Pulse 1/2a/2b/3a/3b requirements and is widely deployed in automotive ECUs, Taiwan Semiconductor does not list AEC-Q200 qualification in the official SMBJ series datasheet (Rev R2104). Customers requiring formal AEC-Q200 certification should verify test reports directly with TSC or select explicitly qualified alternatives.
What is the leakage current specification for SMBJ13A at its working stand-off voltage?
The SMBJ13A exhibits a maximum blocking leakage current (ID) of 1 µA when biased at its 13 V working stand-off voltage (VWM), measured at TA = 25°C. This ultra-low leakage ensures minimal impact on battery life in always-on systems and preserves accuracy in precision analog circuits powered from protected rails.
Can SMBJ13A be used in place of SMBJ13 without modification to the PCB layout?
Yes - SMBJ13A and SMBJ13 share identical DO-214AA (SMB) package dimensions, pinout, and thermal characteristics. The "A" suffix denotes tighter VBR tolerance (14.4–15.9 V vs. 14.4–17.6 V), resulting in more consistent clamping behavior. No PCB changes are required when upgrading from SMBJ13 to SMBJ13A.
SMBJ13A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 28A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ13A FAQ
1.How can I place an order for SMBJ13A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ13A 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 SMBJ13A reliable?
The price and inventory of SMBJ13A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ13A is usually 5 days.
3.What payment methods are accepted for SMBJ13A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ13A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ13A?
SMBJ13A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ13A 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 SMBJ13A?
For technical support, including SMBJ13A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ13A requirements.
6.How does Aetrix verify that SMBJ13A is sourced from the original manufacturer or authorized distributors?
All SMBJ13A 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 SMBJ13A meets industry standards.
7.What is the process for return or replacement of SMBJ13A?
All SMBJ13A units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ13A, 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 SMBJ13A part is unused and in its original packaging.
Return procedure for SMBJ13A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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