My Inquiry
My Account
Taiwan Semiconductor Corporation SMAJ10H
- Part No.:
- SMAJ10H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10H.pdf
- Description:
- TVS DIODE 10VWM 18.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,386
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ10H from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, with 10V working stand-off voltage (VWM), 11.1–13.6V breakdown voltage (VBR), and 18.8V clamping voltage (VC) at 21.3A peak pulse current. It delivers AEC-Q101 qualification and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive power line protection.
For engineers reviewing the SMAJ10H datasheet, SMAJ10H pinout, SMAJ10H application, or SMAJ10H equivalent, this device is selected for robust overvoltage protection in DC/DC converters, SMPS inputs, and automotive body electronics where fast response (<1.0 ps), low leakage (<5 µA @ 10 V), and stable clamping under 10/1000 µs transients are critical.
Technical Context
The SMAJ10H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its minimum breakdown threshold of 11.1 V at 10 mA test current. Its glass-passivated junction ensures stable VBR tolerance and low leakage, while the DO-214AC package supports automated placement and JESD201 Class 2 whisker resistance.
It sustains 400 W peak pulse power per 10/1000 µs waveform up to 25 °C, derating linearly above ambient temperature per Fig.2, and clamps transients to ≤18.8 V at 21.3 A - enabling reliable protection of 12 V automotive and industrial control circuits without upstream fuse coordination issues.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse operating voltage before conduction begins; sets system-level surge immunity margin for 12 V nominal rails. |
| VBR min/max | 11.1 V / 13.6 V @ 10 mA - Confirmed avalanche onset range; ensures predictable turn-on across temperature and lot variation. |
| VC @ IPPM | 18.8 V @ 21.3 A - Clamped voltage during 10/1000 µs transient; limits downstream IC stress to safe levels in automotive load-dump scenarios. |
| PPPM | 400 W (10/1000 µs) - Peak transient energy absorption capability; sufficient for ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2b (battery disconnect). |
| IR @ VWM | <5 µA @ 10 V - Ultra-low reverse leakage; avoids parasitic loading on high-impedance sensor or bias networks. |
| TJ max | 150 °C - Maximum junction temperature rating; enables operation in under-hood automotive environments with minimal thermal derating. |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability; moisture sensitivity level 1 (J-STD-020); weight ≈ 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail; defines unidirectional current path during clamping. |
| Cathode | Reverse-biased input terminal | Connected to protected line (e.g., 12 V supply); avalanche conduction initiates here during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suitable for front-end protection in ADAS and body control modules. |
| Clamping voltage ≤18.8 V | Ensures protected 12 V logic or microcontroller I/O remains below absolute maximum ratings during ISO 7637-2 transients. |
| Response time <1.0 ps | Enables suppression of nanosecond-scale ESD and fast-rising load-dump edges before sensitive circuitry reacts. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive; supports environmentally compliant manufacturing and end-of-life handling. |
Applications
| Automotive Body Electronics | Industrial DC/DC Converters |
|---|---|
Use Scenario: Protection of LIN bus transceivers and door module MCUs against battery line transients in 12 V vehicle architectures. IC Role / Device Role: Unidirectional TVS placed between VBAT and GND, downstream of main fuse and upstream of LDO input. Use Value: Limits clamped voltage to 18.8 V, preventing latch-up or oxide damage in 24 V-tolerant but 12 V-biased peripherals. |
Use Scenario: Input-side surge suppression for isolated 24 V-to-5 V flyback converters powering PLC I/O modules. IC Role / Device Role: Primary-side TVS connected across primary winding input, absorbing coupled transients from factory power distribution lines. Use Value: Withstands 400 W pulses without degradation, maintaining converter uptime in harsh industrial environments with frequent switching noise. |
| LED Lighting Drivers | Consumer Power Adapters |
Use Scenario: Overvoltage protection for constant-current LED drivers subjected to lightning-induced surges on AC mains input. IC Role / Device Role: Secondary-side TVS across output capacitor terminals to safeguard driver ICs from reflected transients. Use Value: Low 5 µA leakage prevents standby current increase; 150 °C TJ rating supports compact, thermally constrained LED housing designs. |
Use Scenario: Input-stage transient suppression in universal-input (90–264 VAC) AC/DC adapters for smart home devices. IC Role / Device Role: Bridge rectifier output clamp, limiting DC bus overshoot during line surges before bulk capacitor charging. Use Value: Fast <1.0 ps response captures leading edge of surge waveforms, reducing required MOV size and improving adapter efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ10AHE3/5A | Same DO-214AC package, AEC-Q101 qualified, but tighter VBR tolerance (11.1–12.3 V) and lower VC (17.0 V @ 23.5 A). | Better clamping performance in space-constrained 12 V systems requiring sub-17.5 V protection ceiling. | Select when lower clamping voltage is prioritized over cost; verify layout compatibility with identical footprint. |
| ON Semiconductor SMAJ10A | Non-AEC-Q101 version; same VWM/VBR/VC specs but lacks automotive qualification testing and traceability documentation. | Suitable for commercial-grade power supplies and consumer adapters where automotive reliability is not mandated. | Choose for cost-sensitive non-automotive designs; confirm compliance requirements before deployment in automotive BOMs. |
Compared with SMAJ10H, the Littelfuse SMAJ10AHE3/5A offers superior clamping (17.0 V vs. 18.8 V) for tighter voltage margins, while the ON Semiconductor SMAJ10A provides identical electrical specs at lower qualification assurance - making SMAJ10H the balanced choice for AEC-Q101–required automotive front-end protection.
Availability
SMAJ10H is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC/DC converters, and LED lighting drivers requiring stable component supply, full traceability, and AEC-Q101 compliance.
Supply support for SMAJ10H 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 components.
The SMAJ series is designed specifically for high-reliability transient suppression in automotive and industrial power systems, emphasizing AEC-Q101 qualification, low clamping voltage, and robust 10/1000 µs pulse handling.
FAQ
What is the polarity configuration of SMAJ10H?
The SMAJ10H is a unidirectional transient voltage suppressor diode, with cathode marked by a band on the DO-214AC package. It conducts only when reverse-biased beyond its breakdown voltage (11.1–13.6 V), making it suitable for protecting positive-rail systems like 12 V automotive supplies. The SMAJ10H must be oriented with cathode toward the protected line and anode to ground to function correctly.
Does SMAJ10H meet automotive qualification standards?
Yes, SMAJ10H is AEC-Q101 qualified per the manufacturer's documentation, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD. This certification confirms its suitability for automotive applications such as body control modules and infotainment power supplies - a key differentiator from commercial-grade alternatives like SMAJ10A.
What is the maximum clamping voltage of SMAJ10H under standard test conditions?
The SMAJ10H has a maximum clamping voltage (VC) of 18.8 V at 21.3 A peak pulse current, measured using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and represents the upper limit of voltage seen by downstream circuitry during transient events - critical for ensuring compatibility with 24 V-tolerant but 12 V-biased ICs.
Can SMAJ10H be used in bidirectional configurations?
No, SMAJ10H is strictly unidirectional. For bidirectional protection, Taiwan Semiconductor specifies part numbers with "CH" or "CAH" suffixes (e.g., SMAJ10CH). Using SMAJ10H in reverse-biased AC applications would result in forward conduction and potential failure; always select SMAJ10CH or equivalent for symmetrical surge suppression.
What packaging and reel quantity is available for SMAJ10H?
SMAJ10H is supplied in DO-214AC (SMA) package on tape-and-reel format, with 7,500 units per reel. The tape meets EIA-481 standards, and the reels are compatible with standard SMT pick-and-place equipment. Lead finish is matte tin, certified solderable per J-STD-002, supporting both lead-free and SnPb reflow profiles.
SMAJ10H 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):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 18.8V
- Current - Peak Pulse (10/1000µs):
- 21.3A
- 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)
SMAJ10H FAQ
1.How can I place an order for SMAJ10H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10H 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 SMAJ10H reliable?
The price and inventory of SMAJ10H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ10H is usually 5 days.
3.What payment methods are accepted for SMAJ10H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10H?
SMAJ10H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10H 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 SMAJ10H?
For technical support, including SMAJ10H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10H requirements.
6.How does Aetrix verify that SMAJ10H is sourced from the original manufacturer or authorized distributors?
All SMAJ10H 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 SMAJ10H meets industry standards.
7.What is the process for return or replacement of SMAJ10H?
All SMAJ10H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10H, 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 SMAJ10H part is unused and in its original packaging.
Return procedure for SMAJ10H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ10H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
