My Inquiry
My Account
Taiwan Semiconductor Corporation SMAJ6.5CH
- Part No.:
- SMAJ6.5CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5CH.pdf
- Description:
- 400W, 8V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,377
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ6.5CH from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for automotive-grade overvoltage protection with AEC-Q101 qualification, 7.22–8.82 V breakdown voltage (VBR), and 12.3 V clamping voltage (VC) at 500 A peak pulse current. It protects DC/DC converters and SMPS inputs against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMAJ6.5CH datasheet, SMAJ6.5CH pinout, SMAJ6.5CH application, or SMAJ6.5CH equivalent, this page delivers verified electrical specs, clamping performance under 10/1000 µs waveform, AEC-Q101 compliance status, DO-214AC mechanical data, and direct alternatives for automotive power rail protection design.
Technical Context
The SMAJ6.5CH operates as a unidirectional avalanche diode with glass-passivated junction, enabling sub-1 ps response from 0 V to VBR(min). Its 10 V working stand-off voltage (VWM) and ≤6.5 µA reverse leakage at VWM ensure minimal standby power loss in 12 V automotive systems.
It delivers 400 W peak pulse power (10/1000 µs) up to 78 V VWM, derating linearly above 25 °C ambient per Fig.2; maximum junction temperature is 150 °C, and polarity is marked by cathode band per DO-214AC outline.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse operating voltage before conduction begins; sets system-level surge immunity threshold for 12 V nominal rails. |
| VBR(min) / VBR(max) | 7.22 V / 8.82 V at 6.5 mA - Confirmed breakdown range ensures reliable triggering across production lot and temperature variation. |
| VC @ IPPM | 12.3 V at 500 A - Clamping voltage during 10/1000 µs transient; limits downstream IC stress to safe levels in automotive load-dump scenarios. |
| IPPM | 500 A - Peak impulse current capability under standard 10/1000 µs waveform; defines transient energy absorption capacity. |
| PPK | 400 W - Peak pulse power rating at TA = 25 °C; supports robust protection without thermal runaway in short-duration surges. |
| TJ(MAX) | 150 °C - Maximum junction temperature; enables operation in under-hood environments with validated thermal margin. |
| Package | DO-214AC (SMA) - Surface-mount package with matte tin-plated leads, J-STD-002 solderability, and UL 94V-0 molding compound. |
Pinout & Package
DO-214AC (SMA) package: Cathode-marked unidirectional device with axial lead configuration. Anode and cathode terminals are defined by molded cathode band; no internal series resistance or integrated circuitry.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-potential node; completes clamping path during reverse transient events. |
| Cathode | High-side protected node | Connected to protected line (e.g., 12 V rail); conducts avalanche current when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD; supports PPAP documentation. |
| Clamping voltage ≤12.3 V at 500 A | Ensures downstream 15 V-rated components remain within absolute maximum ratings during ISO 7637-2 Pulse 2a (inductive switch-off). |
| Reverse leakage ≤6.5 µA at 10 V | Minimizes quiescent current draw in always-on vehicle modules (e.g., CAN wake-up circuits), preserving battery life. |
| Glass-passivated junction | Provides stable VBR tolerance and long-term reliability under humidity and thermal cycling; eliminates risk of junction corrosion. |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking; compatible with high-volume automated placement on automotive PCBs. |
Applications
| Automotive Body Control Module (BCM) | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protects microcontroller I/O and CAN transceiver power rails from load dump and jump-start transients in BCMs. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between 12 V input and ground, clamping surges before they reach LDOs and communication ICs. Use Value: Limits VIN to ≤12.3 V during 500 A transients, preventing latch-up or permanent damage to 15 V-tolerant automotive MCUs. |
Use Scenario: Shields isolated DC/DC converter primary-side MOSFET gate drivers and feedback resistors from switching-induced overshoot. IC Role / Device Role / Timing Role: Standoff protector on input bus; absorbs repetitive 10/1000 µs spikes generated by adjacent high-di/dt power stages. Use Value: Maintains VWM = 10 V margin below nominal 12 V input, ensuring zero false triggering while delivering 400 W transient suppression. |
| LED Headlamp Driver Supply | USB-C Power Delivery Adapter |
Use Scenario: Safeguards constant-current LED driver ICs from alternator ripple and ignition coil coupling in headlamp assemblies. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail upstream of buck controller; activated only during >7.22 V excursions. Use Value: Achieves <1 ps response time to suppress fast-edge transients (<10 ns rise), preventing LED string flicker or driver shutdown. |
Use Scenario: Provides secondary-side surge protection on 5 V USB-C output rail against hot-plug and ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS tied between VBUS and GND; leverages low 6.5 µA leakage to avoid compromising USB suspend current budgets. Use Value: Clamps to 12.3 V at 500 A while maintaining RoHS and halogen-free compliance required for consumer adapter certifications. |
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 SMAJ6.5AHE3/5A | Same DO-214AC package, VBR = 7.22–7.98 V, VC = 11.2 V @ 500 A, AEC-Q101 qualified. | Lower clamping voltage improves margin for 13.5 V-rated loads but requires verification of reduced VBR tolerance impact on false trigger rate. | Select when tighter clamping is prioritized over maximum VBR consistency; verify layout compatibility with identical footprint. |
| ON Semiconductor SMAJ6.5A | DO-214AC, VBR = 7.22–7.98 V, VC = 11.2 V @ 500 A, AEC-Q101 qualified, same 10 V VWM. | Identical electrical envelope and qualification; differs only in manufacturing source and traceability chain. | Preferred for dual-sourcing strategies where Taiwan Semiconductor allocation is constrained; no redesign needed. |
Compared with SMAJ6.5CH, SMAJ6.5AHE3/5A offers lower clamping (11.2 V vs. 12.3 V) at identical current, while SMAJ6.5A provides identical specs with alternate supply chain assurance-both retain DO-214AC compatibility and AEC-Q101 validation for automotive deployment.
Availability
SMAJ6.5CH is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC/DC converter inputs, and LED lighting power supplies requiring stable component supply with AEC-Q101 compliance and 400 W transient immunity.
Supply support for SMAJ6.5CH 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 devices since 1979.
The SMAJ series was developed specifically for AEC-Q101-compliant automotive power rail protection, emphasizing low clamping voltage, high surge robustness, and surface-mount manufacturability in DO-214AC packaging.
FAQ
What is the clamping voltage of SMAJ6.5CH at its rated peak pulse current?
The SMAJ6.5CH has a maximum clamping voltage (VC) of 12.3 V at 500 A peak pulse current under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that protected circuitry sees no more than 12.3 V during worst-case transient events, making SMAJ6.5CH suitable for safeguarding 15 V-tolerant automotive ICs.
Is SMAJ6.5CH qualified for automotive applications?
Yes, SMAJ6.5CH is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature reverse bias, temperature cycling, and ESD per automotive reliability standards. This qualification confirms its suitability for under-hood and body electronics applications where long-term reliability under thermal and electrical stress is mandatory.
What does the "CH" suffix indicate in SMAJ6.5CH?
The "CH" suffix denotes a unidirectional SMAJ device with standard breakdown voltage tolerance (±10% typical), as opposed to "CAH" which indicates tighter VBR tolerance. SMAJ6.5CH is not bidirectional - it features a cathode band marking and must be oriented correctly in-circuit to protect against reverse-polarity transients only.
Can SMAJ6.5CH be used in bidirectional protection circuits?
No, SMAJ6.5CH is strictly unidirectional. For bidirectional protection, Taiwan Semiconductor specifies parts with "CH" or "CAH" suffixes only for unidirectional use; bidirectional variants require "CAH" with explicit dual-directional characterization - SMAJ6.5CH lacks symmetrical VBR and clamping behavior in forward conduction and is not rated for AC or bipolar surge suppression.
What is the maximum operating temperature for SMAJ6.5CH?
The SMAJ6.5CH has a maximum junction temperature (TJ(MAX)) of 150 °C and an operating junction temperature range of –55 °C to +150 °C. This allows reliable operation in under-hood automotive environments and industrial enclosures where ambient temperatures exceed 100 °C, provided PCB thermal relief and power derating per Fig.2 are applied.
SMAJ6.5CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 12.3V
- Current - Peak Pulse (10/1000µs):
- 32.5A
- 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)
SMAJ6.5CH FAQ
1.How can I place an order for SMAJ6.5CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5CH 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 SMAJ6.5CH reliable?
The price and inventory of SMAJ6.5CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.5CH is usually 5 days.
3.What payment methods are accepted for SMAJ6.5CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5CH?
SMAJ6.5CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5CH 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 SMAJ6.5CH?
For technical support, including SMAJ6.5CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5CH requirements.
6.How does Aetrix verify that SMAJ6.5CH is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5CH 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 SMAJ6.5CH meets industry standards.
7.What is the process for return or replacement of SMAJ6.5CH?
All SMAJ6.5CH units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5CH, 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 SMAJ6.5CH part is unused and in its original packaging.
Return procedure for SMAJ6.5CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ6.5CH 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
