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Taiwan Semiconductor Corporation SMDJ36A
- Part No.:
- SMDJ36A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ36A.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SMDJ36A from Taiwan Semiconductor is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 40.0V minimum breakdown voltage (VBR), 36V working stand-off voltage (VWM), and 58.1V maximum clamping voltage (VC) at 51.6A peak pulse current - used to protect power rails and I/O lines in industrial power supplies and telecom interfaces against ESD and lightning-induced transients.
For engineers reviewing the SMDJ36A datasheet, SMDJ36A pinout, SMDJ36A application, or SMDJ36A equivalent, key selection criteria include its 3000W peak pulse power rating, 1.0ps typical response time, -55°C to +175°C operating junction temperature range, compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b, and DO-214AB mechanical compatibility with automated SMT placement.
Technical Context
The SMDJ36A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 40.0–44.2V breakdown range at 1mA test current. It clamps transient energy by shunting surge current away from downstream circuitry, limiting voltage across protected nodes to ≤58.1V at 51.6A.
Its glass-passivated junction ensures stable VBR tolerance and low leakage (<5µA at 36V), while the DO-214AB package provides 75°C/W junction-to-ambient thermal resistance and supports 300A non-repetitive forward surge capability - critical for automotive load-dump immunity and industrial motor drive protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR @ IT=1mA | 40.0–44.2 V - Breakdown threshold defining turn-on precision and margin over system rail |
| VC @ IPPM=51.6A | 58.1 V - Clamped voltage during worst-case 3000W transient, directly bounding stress on protected ICs |
| PPK | 3000 W - Peak pulse power handling per 10/1000µs waveform, enabling robust lightning surge suppression |
| TJ Range | -55°C to +175°C - Full industrial temperature operation without derating up to 125°C ambient |
| IR @ VWM | ≤5 µA - Low leakage preserves battery life and signal integrity in always-on circuits |
| Response Time | <1.0 ps - Sub-nanosecond switching enables effective suppression of fast ESD events (IEC 61000-4-2) |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Transient return path | Connected to ground or low-impedance return plane during clamping |
| Cathode | Reverse-biased input / Protected line connection | Connected to line under protection (e.g., 24V rail, RS-485 bus) |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature, minimizing drift in critical protection thresholds |
| ISO 7637-2 compliance | Validated for automotive load-dump (Pulse 5a/5b) and coupled transient immunity (Pulse 1/2a/2b/3a/3b) |
| Automated placement compatibility | DO-214AB footprint and lead geometry optimized for high-yield pick-and-place assembly |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
Applications
| Industrial Motor Drives | Telecom Power Interfaces |
|---|---|
Use Scenario: Protection of 24V/48V DC input stages in variable-frequency drives against inductive kickback and lightning surges. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across input terminals to clamp transients before they reach rectifier and controller ICs. Use Value: Limits voltage to ≤58.1V during 3000W surges, preventing gate oxide damage to MOSFETs and latch-up in PMICs. | Use Scenario: Surge protection on -48V telecom power feeds entering base station equipment cabinets. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on DC power entry, coordinated with upstream fuses and downstream filters. Use Value: Withstands repeated ISO 7637-2 Pulse 5a (load dump) events up to 175°C junction temperature without degradation. |
| Automotive Body Control Modules | Industrial PLC I/O Terminals |
Use Scenario: Input protection for LIN/CAN node power rails exposed to battery disconnect transients and alternator load dumps. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between VBAT and GND, activated only during overvoltage events >36V. Use Value: 1.0ps response ensures clamping before microcontroller reset circuits trigger, maintaining functional safety integrity. | Use Scenario: Protection of 24V digital input channels in programmable logic controllers subjected to field-wiring induced transients. IC Role / Device Role / Timing Role: Discrete TVS mounted adjacent to terminal block, shunting surge energy before it reaches optocoupler or isolator inputs. Use Value: 5µA max leakage at 36V avoids false triggering in high-impedance sensing circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC36A (Littelfuse) | Same 36V VWM, but 3300W PPK; slightly higher VC = 60.5V at 50A | Higher clamping voltage reduces margin for 3.3V/5V logic protection; better suited for 24V+ systems | Select SAC36A if higher peak power margin is required and clamping voltage budget allows +2.4V overhead |
| 1.5SMC36A (ON Semiconductor) | Identical DO-214AB package and VWM/VBR specs; VC = 58.1V same, but PPK rated at 1500W (half) | Limited to lower-energy transients; not suitable for ISO 7637-2 Pulse 5a or lightning-level surges | Choose 1.5SMC36A only for cost-sensitive, low-risk consumer applications where 3000W is not mandated |
Compared with SAC36A and 1.5SMC36A, the SMDJ36A delivers full 3000W surge capacity with identical clamping performance and broader automotive/industrial qualification - making it the preferred choice for designs requiring certified ISO 7637-2 immunity and sustained high-temperature reliability.
Availability
SMDJ36A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power interfaces, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for SMDJ36A 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 SMDJ series was developed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial automation, and telecom infrastructure where reliability under repetitive surge stress is mandatory.
FAQ
What is the maximum clamping voltage of the SMDJ36A under standard test conditions?
The SMDJ36A has a maximum clamping voltage (VC) of 58.1 V when subjected to a 10/1000 µs waveform peak pulse current of 51.6 A. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during a 3000W transient event. The SMDJ36A maintains this clamping performance across its full operating temperature range, making it suitable for use in thermally demanding industrial and automotive applications.
Is the SMDJ36A suitable for bidirectional transient protection?
No, the SMDJ36A is a unidirectional TVS diode and is not rated for bidirectional operation. For bidirectional protection at the same voltage rating, the SMDJ36CA variant must be used - which features symmetrical breakdown in both polarities. Using the SMDJ36A in reverse-biased AC or bipolar signal paths may result in unintended conduction or failure. Always verify polarity marking (cathode band) during PCB layout for the SMDJ36A.
Does the SMDJ36A meet automotive-grade reliability standards?
Yes, the SMDJ36A meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for transient immunity in automotive electronic systems. Its -55°C to +175°C junction temperature range, glass-passivated junction, and JESD201 Class 2 whisker resistance support AEC-Q200 alignment when qualified per customer-specific stress testing. While not pre-certified to AEC-Q200, the SMDJ36A's construction and test data align with automotive environmental stress profiles.
What is the thermal resistance of the SMDJ36A in its DO-214AB package?
The SMDJ36A has a junction-to-ambient thermal resistance (RθJA) of 75°C/W and a junction-to-lead thermal resistance (RθJL) of 15°C/W, both specified under standard JEDEC mounting conditions. These values assume the device is soldered to a 1-inch² copper pad on a 1-oz FR-4 board. Effective heatsinking via thermal vias or larger copper areas can reduce RθJA, improving sustained surge handling in high-duty-cycle applications.
How does the SMDJ36A compare to the older SMAJ36A in terms of surge capability?
The SMDJ36A delivers 3000W peak pulse power, double the 1500W rating of the SMAJ36A, due to its larger DO-214AB (SMC) package versus the smaller DO-214AC (SMA). Both share identical VWM (36V) and VBR (40.0–44.2V), but the SMDJ36A achieves lower clamping impedance and superior thermal mass - enabling reliable operation under repeated ISO 7637-2 Pulse 5a load-dump events where the SMAJ36A would thermally saturate.
SMDJ36A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMDJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 51.6A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMDJ36A FAQ
1.How can I place an order for SMDJ36A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ36A 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 SMDJ36A reliable?
The price and inventory of SMDJ36A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ36A is usually 5 days.
3.What payment methods are accepted for SMDJ36A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ36A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ36A?
SMDJ36A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ36A 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 SMDJ36A?
For technical support, including SMDJ36A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ36A requirements.
6.How does Aetrix verify that SMDJ36A is sourced from the original manufacturer or authorized distributors?
All SMDJ36A 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 SMDJ36A meets industry standards.
7.What is the process for return or replacement of SMDJ36A?
All SMDJ36A units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ36A, 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 SMDJ36A part is unused and in its original packaging.
Return procedure for SMDJ36A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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