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Taiwan Semiconductor Corporation SMAJ13H
- Part No.:
- SMAJ13H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13H.pdf
- Description:
- TVS DIODE 13VWM 23.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,977
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Product details
Overview
SMAJ13H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping fast transients in DC power lines. It features a 13 V working stand-off voltage (VWM), 14.4–17.6 V breakdown voltage (VBR), 23.8 V maximum clamping voltage (VC) at 16.8 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - ideal for protecting automotive DC/DC converters against ISO 7637-2 pulses.
For engineers reviewing the SMAJ13H datasheet, SMAJ13H pinout, SMAJ13H application, or SMAJ13H equivalent, key selection criteria include clamping performance under 10/1000 µs surge, unidirectional polarity marking, AEC-Q101 qualification for automotive use, and compatibility with automated SMT placement on DO-214AC footprints.
Technical Context
The SMAJ13H operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to shunt transient energy to ground. Its glass-passivated junction ensures stable VBR tolerance (±5% typical), low leakage (<1 µA at 13 V), and fast response (<1.0 ps rise time from 0 V to VBR min).
It is rated for 150 °C maximum junction temperature, supports 40 A non-repetitive forward surge (IFSM), and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b immunity requirements - confirming suitability for harsh automotive electrical environments where load dump and inductive switching transients occur.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR @ IT = 1 mA | 14.4–17.6 V - verified avalanche onset range; ensures predictable turn-on during transients |
| VC @ IPPM = 16.8 A | 23.8 V - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level |
| PPPM (10/1000 µs) | 400 W - peak transient energy absorption capability; sufficient for ISO 7637-2 Pulse 1 (−150 V/2 Ω) |
| IR @ VWM | <1 µA - negligible standby leakage; avoids battery drain in always-on automotive modules |
| Package | DO-214AC (SMA) - industry-standard SMT footprint; compatible with JEDEC MS-013AC outline and J-STD-020 Level 1 moisture sensitivity |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, cathode band marking polarity, 0.060 g weight, UL 94V-0 flammability rating, and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge events |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); avalanches to clamp transients when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Ensures stable VBR over lifetime and prevents parameter drift under thermal/humidity stress |
| Fast response time <1.0 ps | Enables clamping before sensitive downstream ICs experience overvoltage damage |
| ISO 7637-2 compliance | Guarantees robustness against real-world automotive transients: load dump, alternator ripple, and inductive switch-off |
Applications
| Automotive On-Board DC/DC Converter | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Protecting 12 V input rails of buck converters powering ADAS sensors in vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed at converter input to absorb ISO 7637-2 Pulse 1 (−150 V) and Pulse 3b (±50 V) transients. Use Value: Limits voltage seen by controller IC to ≤23.8 V during 16.8 A surge, preventing latch-up or gate oxide damage in MOSFET drivers. | Use Scenario: Safeguarding primary-side rectifier output in industrial 24 V AC/DC power supplies. IC Role / Device Role / Timing Role: Standoff protector across bulk capacitor terminals to suppress line-induced surges and switching noise. Use Value: Withstands 400 W peak pulse without degradation, maintaining <1 µA leakage at 13 V to avoid efficiency loss in standby mode. |
| LED Driver Power Input | Automotive Body Control Module (BCM) |
Use Scenario: Shielding constant-current LED driver ICs from battery line transients in vehicle lighting systems. IC Role / Device Role / Timing Role: Reverse-biased TVS connected between LED supply rail and chassis ground to clamp negative-going spikes. Use Value: Cathode-band polarity ensures correct orientation; 23.8 V clamping prevents overvoltage failure of high-side current sense amplifiers. | Use Scenario: Protecting microcontroller I/O and CAN transceiver power rails in BCMs exposed to load dump events. IC Role / Device Role / Timing Role: Primary-level transient suppressor on 12 V distribution bus feeding multiple subsystems. Use Value: AEC-Q101 qualification and 150 °C TJ max enable operation in engine bay environments without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13AH | Narrower VBR range (14.4–15.9 V vs. 14.4–17.6 V); tighter 5% tolerance; same VWM, VC, and PPPM | Preferred where precise clamping onset is required (e.g., tight-margin 12 V systems) | Select SMAJ13AH when VBR consistency matters more than cost; SMAJ13H offers broader tolerance for general-purpose use. |
| SMBJ13H | Same electrical specs but DO-214AA (SMB) package - 2.54 mm lead spacing vs. SMA's 2.29 mm; 600 W PPPM rating | Used where higher surge margin or legacy SMB footprint is mandated | SMBJ13H is not pin-compatible; requires PCB redesign due to larger body and pitch - choose only if 600 W rating is essential. |
Compared with SMAJ13AH and SMBJ13H, the SMAJ13H delivers optimal balance of AEC-Q101 reliability, DO-214AC SMT compatibility, and 400 W surge handling for cost-sensitive automotive and industrial DC rail protection - without requiring layout changes or sacrificing clamping precision.
Availability
SMAJ13H is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS inputs, and LED driver protection requiring stable component supply across production lifecycles.
Supply support for SMAJ13H 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 power devices, TVS diodes, and rectifiers since 1979.
The SMAJ series was developed specifically for AEC-Q101-compliant transient suppression in automotive power networks and industrial 12–48 V systems - emphasizing robust clamping, low leakage, and SMT manufacturability.
FAQ
What is the maximum clamping voltage of the SMAJ13H under standard test conditions?
The SMAJ13H has a maximum clamping voltage (VC) of 23.8 V when subjected to a 10/1000 µs peak pulse current of 16.8 A. This value is measured per IEC 61000-4-5 and ISO 7637-2 standards and defines the upper voltage limit imposed on protected circuits during surge events. The SMAJ13H maintains this clamping performance consistently across its specified operating temperature range.
Is the SMAJ13H suitable for bidirectional transient protection?
No, the SMAJ13H is a unidirectional TVS diode intended for single-polarity clamping - it conducts only in reverse bias above its breakdown voltage. For bidirectional protection, Taiwan Semiconductor specifies parts with CH or CAH suffixes (e.g., SMAJ13CH). Using SMAJ13H in bidirectional applications risks failure during positive transients, as it lacks symmetrical clamping capability.
Does the SMAJ13H meet automotive qualification standards?
Yes, the SMAJ13H is AEC-Q101 qualified and explicitly tested for automotive use cases, including compliance with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b. Its construction - glass-passivated junction, DO-214AC package, and JESD 201 Class 2 whisker resistance - satisfies environmental and reliability requirements for under-hood and body electronics applications.
What is the reverse leakage current specification for the SMAJ13H at its working voltage?
The SMAJ13H exhibits a maximum reverse leakage current (IR) 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 power loss in always-on systems such as automotive body control modules and enables long-term battery-backed operation without significant drain.
Can the SMAJ13H be used in place of SMAJ13AH without design changes?
Yes, the SMAJ13H and SMAJ13AH share identical package (DO-214AC), pinout, VWM (13 V), VC (23.8 V), and PPPM (400 W), making them physically and electrically interchangeable in most layouts. However, SMAJ13AH has a tighter VBR range (14.4–15.9 V) versus SMAJ13H (14.4–17.6 V); system-level validation is recommended if precise clamping onset timing is critical.
SMAJ13H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- SMAJ
- 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:
- 23.8V
- Current - Peak Pulse (10/1000µs):
- 16.8A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
SMAJ13H FAQ
1.How can I place an order for SMAJ13H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13H 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 SMAJ13H reliable?
The price and inventory of SMAJ13H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ13H is usually 5 days.
3.What payment methods are accepted for SMAJ13H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13H?
SMAJ13H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13H 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 SMAJ13H?
For technical support, including SMAJ13H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13H requirements.
6.How does Aetrix verify that SMAJ13H is sourced from the original manufacturer or authorized distributors?
All SMAJ13H 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 SMAJ13H meets industry standards.
7.What is the process for return or replacement of SMAJ13H?
All SMAJ13H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13H, 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 SMAJ13H part is unused and in its original packaging.
Return procedure for SMAJ13H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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