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Diodes Incorporated TB3500M-13
- Part No.:
- TB3500M-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Thyristors
- Package:
- DO-214AA, SMB
- Datasheet:
-
TB3500M-13.pdf
- Description:
- THYRISTOR 320V 250A DO-214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,765
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Product details
TB3500M-13 from Diodes Incorporated
TB3500M-13 is a bi-directional surface-mount thyristor surge protective device (TSPD) designed for telecom and industrial AC/DC line protection. It provides 320V stand-off voltage, 400V breakover voltage, 50A peak pulse current (10/1000μs), 250A peak surge current (8/20μs), and 60pF off-state capacitance - enabling robust GR-1089-CORE and IEC 61000-4-5 compliance in DSL, POTS, and PoE-powered equipment.
For engineers reviewing the TB3500M-13 datasheet, TB3500M-13 pinout, TB3500M-13 application, or TB3500M-13 equivalent, key selection criteria include verified bi-directional clamping behavior, junction temperature derating up to +150°C, low on-state voltage (3.5V @ 1A), and SMB package compatibility with automated SMT assembly for telecom interface protection circuits.
Technical Context
This TSPD operates as a voltage-triggered crowbar device: it remains high-impedance below 320V, triggers at ~400V (VBO), and latches into low-voltage conduction until current falls below 150–800mA holding threshold. Its oxide-glass passivated junction ensures stable breakdown over -40°C to +150°C.
Unlike TVS diodes, it sustains surge energy via controlled latch-up and thermal recovery (<30ms), delivering higher peak current handling (250A @ 8/20μs) without degradation - critical for repeated lightning-induced transients on analog telephony lines and Ethernet ports.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VDRM) | 320V - maximum continuous reverse/forward voltage before leakage exceeds 5μA; defines operating margin for 277VAC systems. |
| Breakover Voltage (VBO) | 400V ±5% - precise triggering threshold ensuring reliable clamping before downstream IC damage in telecom line interfaces. |
| Peak Pulse Current (Ipp) | 50A @ 10/1000μs - validated surge rating per GR-1089-CORE Level 3; supports multi-event transient immunity. |
| On-State Voltage (VT) | 3.5V @ 1A - low conduction loss minimizes power dissipation during clamping, reducing thermal stress on PCB traces. |
| Off-State Capacitance (CO) | 60pF @ 1MHz, 2VDC - preserves signal integrity in broadband DSL/PoE applications without high-frequency attenuation. |
| Junction Temp Range (Tj) | -40°C to +150°C - enables deployment in uncontrolled environments like outdoor DSLAM cabinets and industrial gateways. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bi-directional, polarity-free device with solderable matte tin-plated terminals compliant with MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (A/K) | Bi-directional main terminals | No polarity marking; either terminal serves as anode or cathode depending on transient polarity - simplifies layout and eliminates orientation errors. |
| Case | Non-electrical mechanical body | UL 94V-0 molded plastic housing; no internal connection - allows direct thermal coupling to copper pour for enhanced power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Oxide-glass passivated junction | Ensures long-term parameter stability and low leakage drift across temperature and humidity cycles. |
| Bi-directional clamping | Eliminates need for dual-device configurations in AC-coupled lines such as telephone tip/ring or PoE data pairs. |
| High off-state impedance | Leakage <5μA at 320V enables minimal standby power loss and avoids false triggering in low-power monitoring circuits. |
| Thermal resistance (RJL) | 20°C/W junction-to-lead - supports >30A surge current handling without external heatsinking when mounted on ≥1 sq-in 2oz copper. |
Applications
| DSL Line Interface Protection | PoE Data Pair Surge Suppression |
|---|---|
Use Scenario: Protecting ADSL/VDSL line drivers and receivers from lightning-induced surges on twisted-pair copper lines. IC Role / Device Role: Primary crowbar-level surge protector placed before line transformer and codec ICs. Use Value: 320V VDRM matches 277VAC line peaks; 60pF CO prevents high-frequency signal loss up to 30MHz. | Use Scenario: Safeguarding IEEE 802.3af/at Power over Ethernet switches and PDs against cable discharge events. IC Role / Device Role: Bi-directional transient suppressor on data pairs (pins 1–2, 3–6) carrying both power and 100BASE-TX signals. Use Value: Latching action sustains clamping during 250A 8/20μs surges while maintaining <3.5V clamping voltage to protect PHY transceivers. |
| Industrial Analog I/O Protection | AC Mains-Fed Telecom Equipment |
Use Scenario: Shielding 4–20mA current loop inputs and outputs in PLC analog modules from EFT and surge coupling. IC Role / Device Role: Standoff-limited front-end protector that blocks transients before precision op-amps and ADCs. Use Value: -40°C to +150°C operation ensures reliability in factory-floor enclosures; 20°C/W RJL enables thermal design without added footprint. | Use Scenario: Secondary surge protection in AC/DC power supplies for VoIP gateways and IP PBX systems. IC Role / Device Role: Back-to-back TSPD across AC input lines (L–N, L–PE, N–PE) meeting UL497B and ITU-T K.21 requirements. Use Value: UL Recognized Component (File #156346) confirms compliance; 320V rating covers 277VAC nominal mains with safety margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional thyristor surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ33CA | Unidirectional TVS diode; 33V standoff, 53.3V clamping, no latch-up behavior. | Limited to DC or rectified lines; cannot replace bi-directional AC clamping function. | Select only for low-voltage DC rails where fast response and non-latching behavior are required. |
| TPSMB33CA | Bi-directional TVS; 33V standoff, 53.3V clamping, 100A 8/20μs rating but no holding current control. | Clamps then resets automatically; unsuitable for sustained surge scenarios requiring crowbar hold-on. | Prefer for transient suppression where post-surge circuit reactivation must be immediate and unconditional. |
Compared with SMJ33CA and TPSMB33CA, TB3500M-13 delivers true crowbar action with defined holding current (150–800mA), enabling reliable protection of AC-coupled telecom interfaces where sustained fault current must be actively shunted until source removal.
Availability
TB3500M-13 is available at Aetrix Electronics and suitable for DSL line interface protection, PoE data pair surge suppression, and industrial analog I/O protection requiring stable component supply across extended production lifecycles.
Supply support for TB3500M-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
TB3500M-13 belongs to Diodes' TSPD product line, engineered specifically for high-reliability telecom surge protection with emphasis on GR-1089-CORE, IEC 61000-4-5, and UL497B compliance in carrier-grade infrastructure.
FAQ
What is the recommended PCB layout for TB3500M-13 to ensure optimal thermal performance?
Use ≥1 square inch of 2oz copper connected directly to both terminals via multiple thermal vias (≥6×0.3mm) to inner ground/power planes. Avoid narrow traces - minimum 1.5mm width per terminal. Keep distance to sensitive analog traces >5mm to limit capacitive coupling from 60pF device capacitance.
Does TB3500M-13 require a series current-limiting resistor in telecom line applications?
No series resistor is required for standard GR-1089-CORE compliance testing. The device's 3.5V on-state voltage and 20°C/W thermal resistance allow safe conduction of 50A pulses without external limiting, provided PCB copper area meets minimum thermal mass requirements per Diodes' AP02007 packaging guide.
How does TB3500M-13 behave after triggering - does it self-reset?
TB3500M-13 latches in low-impedance state until current falls below its holding current (150–800mA). It does not self-reset; recovery occurs only when line current drops - e.g., via upstream fuse blow or AC zero-crossing. Recovery time is ≤30ms, confirmed per datasheet Note 1.
Can TB3500M-13 be used in automotive applications?
TB3500M-13 is not AEC-Q200 qualified and lacks automotive-specific validation (e.g., ISO 7637-2 pulse testing). Its -40°C to +150°C junction range supports under-hood ambient temperatures, but Diodes does not endorse or characterize it for automotive use - consult Diodes' AEC-Q200-certified TSPD portfolio instead.
TB3500M-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Breakover:
- 400V
- Voltage - Off State:
- 320V
- Voltage - On State:
- 3.5 V
- Current - Peak Pulse (8/20µs):
- 250 A
- Current - Peak Pulse (10/1000µs):
- 50 A
- Current - Hold (Ih):
- 150 mA
- Number of Elements:
- 1
- Capacitance:
- 60pF
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
TB3500M-13 FAQ
1.How can I place an order for TB3500M-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for TB3500M-13 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 TB3500M-13 reliable?
The price and inventory of TB3500M-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TB3500M-13 is usually 5 days.
3.What payment methods are accepted for TB3500M-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TB3500M-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TB3500M-13?
TB3500M-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TB3500M-13 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 TB3500M-13?
For technical support, including TB3500M-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TB3500M-13 requirements.
6.How does Aetrix verify that TB3500M-13 is sourced from the original manufacturer or authorized distributors?
All TB3500M-13 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 TB3500M-13 meets industry standards.
7.What is the process for return or replacement of TB3500M-13?
All TB3500M-13 units undergo pre-shipment inspection (PSI). If there is an issue with TB3500M-13, 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 TB3500M-13 part is unused and in its original packaging.
Return procedure for TB3500M-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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