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Taiwan Semiconductor Corporation SMAJ130CH
- Part No.:
- SMAJ130CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ130CH.pdf
- Description:
- TVS DIODE 130VWM 231VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,124
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Product details
Overview
SMAJ130CH from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for robust overvoltage protection in automotive and industrial power rails. It features a 130 V working stand-off voltage (VWM), 144–176 V breakdown voltage (VBR) at 1 mA test current, 231 V maximum clamping voltage (VC) at 1.3 A peak impulse current, and 400 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMAJ130CH datasheet, SMAJ130CH pinout, SMAJ130CH application, or SMAJ130CH equivalent, this device is selected for ISO 7637-2-compliant surge suppression in DC/DC converters, SMPS inputs, lighting drivers, and on-board power systems where fast response (<1 ps), low leakage (<1 µA), and AEC-Q101 qualification are required.
Technical Context
The SMAJ130CH is a unidirectional/bidirectional TVS diode - the "CH" suffix denotes bidirectional configuration per manufacturer documentation. Its glass-passivated junction enables stable clamping performance across -55°C to +150°C operating junction temperature range, with polarity indicated by cathode band marking on the DO-214AC case.
It delivers 400 W peak pulse power (10/1000 µs) up to 78 V VWM; above that, derated to 300 W. Clamping occurs within <1.0 ps from 0 V to VBR min, and reverse leakage remains ≤1 µA at 130 V, supporting high-impedance sensing and low-power standby integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 130 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC rail margin. |
| VBR min/max | 144 V / 176 V @ 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on under transients. |
| VC @ IPPM | 231 V @ 1.3 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak surge energy handling capacity; critical for ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance. |
| IR @ VWM | ≤1 µA - Ultra-low reverse leakage preserves system efficiency and battery life in always-on applications. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and high-temperature industrial enclosures. |
| Package | DO-214AC (SMA) - Surface-mount outline with matte tin-plated leads; compatible with J-STD-002 soldering and JESD 201 Class 2 whisker resistance. |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with cathode band marking; dual axial terminals; 0.060 g typical weight; UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point in forward bias; reference node for bidirectional clamping | Terminal polarity is symmetric - either end serves as anode/cathode depending on transient polarity; no dedicated signal directionality. |
| Cathode (banded end) | Current exit point in forward bias; clamping reference for negative transients | Banding indicates terminal orientation per JEDEC DO-214AC standard; used for visual alignment during automated placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for under-hood and ADAS power domains. |
| Glass passivated junction | Stable VBR and low IR over lifetime; resists moisture ingress and electrochemical degradation in humid environments. |
| Fast response time | <1.0 ps from 0 V to VBR min - clamps before sensitive downstream ICs experience overstress, critical for CAN/LIN bus protection. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) - validated for 12 V/24 V vehicle systems. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and end-of-life recycling requirements. |
Applications
| Automotive DC/DC Converter Input | Industrial LED Driver Protection |
|---|---|
Use Scenario: Protects primary-side MOSFETs and controller ICs in 12 V–48 V isolated DC/DC modules subjected to load-dump transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across input bus to shunt surge energy before it reaches switching stage. Use Value: Limits peak rail voltage to ≤231 V during 100 V/100 ms load dump, preventing gate oxide rupture and controller latch-up. |
Use Scenario: Shields constant-current LED driver ICs and sense resistors in streetlight and tunnel lighting systems exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Parallel-connected transient absorber on 24–48 V output rail, activated within sub-nanosecond to clamp induced spikes. Use Value: Maintains LED string continuity during 400 W, 10/1000 µs surges without thermal runaway or optical flicker. |
| On-Board Charger (OBC) Auxiliary Supply | Smart Building PoE+ Power Interface |
Use Scenario: Safeguards 12 V auxiliary supply rails in EV on-board chargers against coupled transients from high-power AC/DC conversion stages. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between isolated DC/DC output and microcontroller power domain. Use Value: Ensures <1 µA leakage at 130 V, preserving sleep-mode current budget while clamping 1.3 A surges to 231 V. |
Use Scenario: Protects 57 V PoE+ (IEEE 802.3at) interface circuits in smart lighting controllers and HVAC nodes from Ethernet-coupled ESD and surges. IC Role / Device Role / Timing Role: Bidirectional rail clamp on PSE-side power delivery line, coordinated with upstream current limiting. Use Value: Withstands repeated 10/1000 µs transients up to 300 W above 78 V, enabling long-term deployment in unshielded building cabling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ130A | Unidirectional only; VBR min/max = 144–159 V; VC = 209 V @ 1.5 A; same DO-214AC package. | Requires external polarity-aware layout; not suitable for AC-coupled or floating-bus protection without series diodes. | Select when unidirectional clamping suffices and lower clamping voltage (209 V vs. 231 V) is prioritized over bidirectional flexibility. |
| ON Semiconductor SMAJ130CA | Same bidirectional function; VBR min/max = 144–176 V; VC = 231 V @ 1.3 A; identical electrical specs and DO-214AC footprint. | Qualified to AEC-Q101 but lacks explicit ISO 7637-2 Pulse 3b validation in public datasheet. | Drop-in alternative if Taiwan Semiconductor supply constraints arise; verify latest revision for full automotive test coverage. |
Compared with SMAJ130CH, SMAJ130A offers tighter clamping but requires polarity-aware design, while SMAJ130CA matches all key parameters and package but may require additional validation for ISO 7637-2 Pulse 3b in safety-critical automotive subsystems.
Availability
SMAJ130CH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial LED drivers, and on-board charger auxiliary supplies requiring stable component supply, AEC-Q101 qualification, and ISO 7637-2 compliance.
Supply support for SMAJ130CH 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, and power MOSFETs since 1979.
The SMAJ series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 reliability, fast clamping, and broad VWM coverage from 5 V to 188 V in standardized surface-mount packages.
FAQ
What does the "CH" suffix indicate in SMAJ130CH?
The "CH" suffix in SMAJ130CH denotes a bidirectional configuration, meaning the device provides symmetrical clamping for both positive and negative transients without polarity dependency. This is confirmed in the manufacturer's documentation, which states that CH/CAH-suffixed types are designated for bipolar applications and exhibit identical electrical characteristics in both directions - unlike unidirectional variants such as SMAJ130AH.
Is SMAJ130CH compliant with ISO 7637-2, and which pulses does it cover?
Yes, SMAJ130CH meets ISO 7637-2 requirements for Pulse 1 (inductive switch-off), Pulse 2a (sudden load disconnection), Pulse 2b (supply interruption), Pulse 3a (capacitive discharge), and Pulse 3b (line-to-ground coupling). This compliance is explicitly stated in the product features section of the official datasheet and validated using the 10/1000 µs test waveform.
What is the maximum clamping voltage of SMAJ130CH under surge conditions?
The maximum clamping voltage (VC) of SMAJ130CH is 231 V at a peak impulse current (IPPM) of 1.3 A, measured with a 10/1000 µs waveform. This value is specified in the Electrical Specifications table for part number SMAJ130H (bidirectional base variant), and applies identically to SMAJ130CH per the family documentation.
Does SMAJ130CH require derating above 25°C ambient temperature?
Yes, SMAJ130CH must be derated above TA = 25°C per the Pulse Derating Curve (Fig.2). Its peak pulse power drops linearly from 400 W at 25°C to approximately 200 W at 100°C ambient, based on the published derating curve. Steady-state power dissipation remains fixed at 1 W regardless of temperature.
Can SMAJ130CH replace SMAJ130A in an existing design?
No - SMAJ130CH is bidirectional while SMAJ130A is unidirectional, so direct replacement requires layout verification. The SMAJ130CH clamps in both polarities, whereas SMAJ130A only protects against reverse transients. Substituting without adjusting circuit topology risks unprotected positive surges and potential system failure.
SMAJ130CH 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 130V
- Voltage - Breakdown (Min):
- 144V
- Voltage - Clamping (Max) @ Ipp:
- 231V
- Current - Peak Pulse (10/1000µs):
- 1.3A
- 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)
SMAJ130CH FAQ
1.How can I place an order for SMAJ130CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ130CH 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 SMAJ130CH reliable?
The price and inventory of SMAJ130CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ130CH is usually 5 days.
3.What payment methods are accepted for SMAJ130CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ130CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ130CH?
SMAJ130CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ130CH 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 SMAJ130CH?
For technical support, including SMAJ130CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ130CH requirements.
6.How does Aetrix verify that SMAJ130CH is sourced from the original manufacturer or authorized distributors?
All SMAJ130CH 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 SMAJ130CH meets industry standards.
7.What is the process for return or replacement of SMAJ130CH?
All SMAJ130CH units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ130CH, 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 SMAJ130CH part is unused and in its original packaging.
Return procedure for SMAJ130CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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