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onsemi NP0640SBMCT3G
- Part No.:
- NP0640SBMCT3G
- Manufacturer:
- onsemi
- Category:
- Thyristors
- Package:
- DO-214AA, SMB
- Datasheet:
-
NP0640SBMCT3G.pdf
- Description:
- THYRISTOR 58V 250A DO-214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,993
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Product details
Overview
NP0640SBMCT3G from onsemi is a bidirectional ultra-low-capacitance thyristor surge protection device (TSPD) designed for telecom line protection in xDSL and T1/E1 interfaces. It features ±58 V repetitive peak off-state voltage (VDRM), ±77 V breakover voltage (V(BO)), 23 pF nominal off-state capacitance at 1 MHz, 4 V on-state voltage at 2.2 A peak, and 150 mA holding current - enabling transparent operation and fast crowbar clamping in high-speed data lines.
For engineers reviewing the NP0640SBMCT3G datasheet, pinout, applications, or equivalent options, key selection criteria include VDRM margin over system operating voltage, V(BO) alignment with protected circuit failure threshold, low Co for minimal signal distortion, surge current rating compliance with GR-1089-CORE/TIA-968-A, and SMB package compatibility with telecom PCB layouts.
Technical Context
The NP0640SBMCT3G operates as a bidirectional crowbar-type protector: it remains high-impedance (open-circuit) during normal operation (IDRM ≤ 5 µA at VDRM), then switches to low-impedance (short-circuit) when transient voltage exceeds ±77 V (V(BO)), shunting surge energy to ground. Its ultra-low 23 pF off-state capacitance ensures linearity up to 100 MHz and preserves signal integrity in broadband DSL/T1/E1 circuits.
This device complies with GR-1089-CORE (2×10/10×360 µs waveforms), ITU-T K.20/K.21/K.45, TIA-968-A, FCC Part 68, and IEC 60950. It supports non-repetitive peak impulse currents up to 150 A (2×10 µs), 90 A (10×160 µs), and 75 A (10×360 µs), with thermal resistance RθJA = 90 °C/W on FR4 PCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM | ±58 V - Maximum continuous AC/DC voltage the device blocks without triggering; must exceed system peak operating voltage (e.g., 48 V DC + 150 V RMS ring = 260 V peak). |
| V(BO) | ±77 V - Guaranteed maximum clamping voltage seen by protected circuit; sets upper limit of transient protection threshold. |
| Co | 23 pF at 1 MHz, 1 Vrms, 2 Vdc bias - Enables <1% signal attenuation in ADSL upstream (138–1104 kHz) and T1 (0–772 kHz) channels. |
| VT | 4 V at 2.2 A peak, 300 µs pulse - Low on-state voltage minimizes power dissipation during surge, allowing compact SMB package handling 150 A surges. |
| IH | 150 mA - Minimum current required to sustain conduction; must exceed system fault current to avoid latch-up after surge clearance. |
| IDRM | 5 µA at VDRM - Ultra-low leakage ensures no loading of high-impedance telecom line drivers during normal operation. |
| IPPS (2×10 µs) | 150 A peak - Withstands lightning-induced surges per GR-1089-CORE Category A, enabling single-device protection without series impedance. |
Pinout & Package
NP0640SBMCT3G uses the SMB (DO-214AA, Case 403C) surface-mount package: 4.06–4.57 mm length, 3.30–3.81 mm width, 1.90–2.41 mm height, with gull-wing leads on 2.26 mm centerline spacing. The device is bidirectional and symmetrical; both terminals serve identical roles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Terminals 1 & 2) | Bidirectional surge path | Interchangeable terminals; either connects to tip/ring line - enables symmetric protection without polarity constraints in AC telecom lines. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low off-state capacitance | 23 pF - Preserves high-frequency signal fidelity in xDSL (up to 30 MHz) and T1/E1 (772 kHz) links without equalization overhead. |
| Low leakage current | ≤5 µA at ±58 V - Eliminates DC loading on SLICs and line drivers, maintaining voice-band signal integrity and reducing power loss. |
| Precise bidirectional breakover | ±77 V (max) - Tight V(BO) tolerance ensures consistent clamping across temperature (−40°C to +150°C junction) and device lot. |
| High surge current capability | 150 A (2×10 µs) - Meets GR-1089-CORE Category A requirements without external current-limiting resistors in central office designs. |
| Pb-free & RoHS-compliant | JEDEC DO-214AA package with matte tin lead finish - Supports lead-free reflow (J-STD-020) and eliminates hexavalent chromium in telecom manufacturing. |
Applications
| xDSL Central Office Line Card | T1/E1 Data Interface |
|---|---|
Use Scenario: Protecting analog front-end (AFE) and SLIC circuits on DSLAM line cards from induced lightning surges on copper subscriber loops. IC Role / Device Role / Timing Role: Crowbar-type transient suppressor placed between tip/ring and ground, triggered only during >±77 V transients. Use Value: 23 pF capacitance prevents upstream/downstream signal degradation; ±58 V VDRM safely isolates 48 V DC bias while clamping 1 kV ring-trip surges. |
Use Scenario: Safeguarding T1/E1 transceivers and transformer-coupled line drivers in telecom access equipment against power-cross and EFT events. IC Role / Device Role / Timing Role: Bidirectional voltage clamp on balanced differential pairs, responding within nanoseconds to overvoltage faults. Use Value: 150 mA holding current ensures automatic recovery post-surge; low VT (4 V) limits power dissipation during 10×160 µs surges up to 90 A. |
| Broadband Access Gateway | VoIP Terminal Adapter |
Use Scenario: Integrated protection in multi-service access gateways handling simultaneous POTS, ADSL2+, and Ethernet over shared copper infrastructure. IC Role / Device Role / Timing Role: Primary line-side surge guard before hybrid transformers and echo cancellers, operating transparently at 0–30 MHz. Use Value: Symmetric ±77 V V(BO) matches full-duplex DSL spectral requirements; SMB footprint allows dense placement near RJ-11 connectors. |
Use Scenario: Surge hardening of residential VoIP adapters connected to PSTN lines subject to lightning-induced transients and AC power cross. IC Role / Device Role / Timing Role: Fail-safe crowbar element that shorts tip/ring to ground during overvoltage, preventing damage to codec ICs and isolation transformers. Use Value: UL recognition and GR-1089 compliance enable direct certification; 150 °C max junction temperature supports sealed enclosure operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar thyristor surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NP0640SCMC | Same electrical specs (VDRM=±58 V, V(BO)=±77 V, Co=23 pF), but in SMB package with different marking (no 'B' suffix) and tape/reel quantity (1000 vs 2500 units). | Identical protection function and PCB layout; differs only in packaging logistics and traceability coding (AYWW vs standard date code). | Select NP0640SCMC if requiring smaller reel size or legacy ordering codes; NP0640SBMCT3G offers optimized volume procurement with 2500-unit reels. |
| SLVU2.8-4 | Unidirectional TVS diode (2.8 V working voltage), 25 pF capacitance, 12 A 8/20 µs surge rating - lacks crowbar latching and bidirectional symmetry. | Suitable only for low-voltage DC rails (e.g., USB, Ethernet PHY power), not AC telecom lines requiring ±77 V clamping and automatic recovery. | Use SLVU2.8-4 only for sub-5 V digital interfaces; NP0640SBMCT3G is mandatory for T1/E1/xDSL line-side AC protection where bidirectional crowbar action and high VDRM are essential. |
Compared with NP0640SCMC, NP0640SBMCT3G provides identical protection performance with enhanced supply chain scalability via 2500-unit reels; versus SLVU2.8-4, it delivers true bidirectional AC line protection with latching crowbar behavior and 12.5× higher surge current capacity - making it irreplaceable for telecom infrastructure applications.
Availability
NP0640SBMCT3G is available at Aetrix Electronics and suitable for xDSL central office deployments, T1/E1 telecom interface designs, and broadband access gateway production requiring stable component supply, RoHS-compliant sourcing, and GR-1089-certified surge protection.
Supply support for NP0640SBMCT3G 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
onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensor, and logic solutions for automotive, industrial, cloud, and communications markets.
The NPMC Series - including NP0640SBMCT3G - was engineered specifically for telecom line protection, delivering ultra-low capacitance and precise bidirectional clamping to meet GR-1089-CORE, ITU-T K.20/K.21, and FCC Part 68 requirements in DSL/T1/E1 infrastructure.
FAQ
What is the primary protection function of the NP0640SBMCT3G?
The NP0640SBMCT3G functions as a bidirectional thyristor surge protection device (TSPD) that operates in an open-circuit state during normal conditions (leakage ≤5 µA) and switches to a low-impedance crowbar state when voltage exceeds ±77 V (V(BO)). This shunts transient energy to ground, protecting downstream SLICs, transceivers, and transformers in xDSL and T1/E1 lines. Its design ensures automatic recovery once surge subsides and current falls below 150 mA (IH).
How does the 23 pF off-state capacitance of NP0640SBMCT3G impact DSL signal integrity?
The NP0640SBMCT3G's 23 pF off-state capacitance at 1 MHz introduces negligible insertion loss (<0.1 dB) across ADSL2+ (0–2.2 MHz) and VDSL2 (0–30 MHz) bands, preserving SNR and bit-loading efficiency. Unlike higher-capacitance MOVs or unidirectional TVS diodes, this value maintains line balance and avoids echo cancellation errors - critical for full-duplex operation where tip/ring symmetry must be preserved.
Can NP0640SBMCT3G replace older NXP or Littelfuse TSPDs in existing telecom designs?
NP0640SBMCT3G is electrically and mechanically compatible with industry-standard SMB-packaged TSPDs such as P0640SBL, but exact drop-in replacement requires verification of VDRM/V(BO) match, surge rating alignment with GR-1089 categories, and thermal layout validation. Its ±58 V VDRM and ±77 V V(BO) align with common telecom protection thresholds, and the SMB footprint (Case 403C) ensures direct PCB substitution without redesign.
What are the key thermal limitations affecting NP0640SBMCT3G reliability in continuous operation?
NP0640SBMCT3G has a maximum junction temperature of +150°C and thermal resistance RθJA = 90 °C/W on a standard FR4 PCB (3″×4.5″, 2 oz copper). Under sustained surge duty cycles, PCB copper area and airflow must ensure junction temperature stays below 125°C to prevent parameter drift. Its −40°C to +150°C operating range supports deployment in uncontrolled environments like street cabinets, provided thermal mass and layout comply with JEDEC JESD51-3 guidelines.
Does NP0640SBMCT3G require external components to meet GR-1089-CORE Category A testing?
No - NP0640SBMCT3G meets GR-1089-CORE Category A (150 A, 2×10 µs) without external series impedance due to its inherent 150 A surge rating and 4 V on-state voltage. However, system-level compliance also depends on PCB trace inductance, grounding topology, and proximity to protected ICs. For Category B/C testing (lower current, longer duration), the same device applies, leveraging its 90 A (10×160 µs) and 75 A (10×360 µs) ratings.
NP0640SBMCT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Breakover:
- 77V
- Voltage - Off State:
- 58V
- Voltage - On State:
- 4 V
- Current - Peak Pulse (8/20µs):
- 250 A
- Current - Peak Pulse (10/1000µs):
- 80 A
- Current - Hold (Ih):
- 150 mA
- Number of Elements:
- 1
- Capacitance:
- 29pF
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
NP0640SBMCT3G FAQ
1.How can I place an order for NP0640SBMCT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for NP0640SBMCT3G 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 NP0640SBMCT3G reliable?
The price and inventory of NP0640SBMCT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NP0640SBMCT3G is usually 5 days.
3.What payment methods are accepted for NP0640SBMCT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NP0640SBMCT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NP0640SBMCT3G?
NP0640SBMCT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NP0640SBMCT3G 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 NP0640SBMCT3G?
For technical support, including NP0640SBMCT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NP0640SBMCT3G requirements.
6.How does Aetrix verify that NP0640SBMCT3G is sourced from the original manufacturer or authorized distributors?
All NP0640SBMCT3G 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 NP0640SBMCT3G meets industry standards.
7.What is the process for return or replacement of NP0640SBMCT3G?
All NP0640SBMCT3G units undergo pre-shipment inspection (PSI). If there is an issue with NP0640SBMCT3G, 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 NP0640SBMCT3G part is unused and in its original packaging.
Return procedure for NP0640SBMCT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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