ALSTOM MVAJ105RA0802A Protection Relay – MiCOM Series
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Model: 21BRX700-D42AA
Product Overview
Commercial availability is handled through direct RFQ, model verification and export-oriented follow-up rather than public cart checkout.
Datasheet Preview
Use attached product manuals when available. If the manual is not public yet, request the full file directly through RFQ.
Commercial Path
Product pages on DRIVEKNMS are designed to verify model, brand and series first, then move the buyer into one clean quotation path.
Technical Dossier
The HAROWE 21BRX700-D42AA is a precision brushless resolver-type rotary encoder widely deployed in servo drive systems, CNC machinery, aerospace ground support equipment, and defense-grade motion control platforms. As OEM production of legacy HAROWE resolver series has tightened, procurement managers face a binary choice: pay spot-market premiums from unverified brokers, or establish a qualified secondary-source relationship with a supplier who can verify authenticity, provide traceable documentation, and ship within a commercially acceptable lead time.
DriveKNMS maintains active sourcing channels for the 21BRX700-D42AA across certified distributor networks and OEM-authorized excess inventory pools. Whether your facility runs a planned maintenance cycle or faces an unplanned line-down event, our team can respond with a verified quote within one business day.
| Part Number | 21BRX700-D42AA |
| Manufacturer | HAROWE (now part of Roper Technologies / TransAct) |
| Type | Brushless Resolver / Rotary Encoder |
| Series | 21BRX Brushless Resolver Series |
| Excitation Voltage | 7 Vrms (typical) |
| Excitation Frequency | 400 Hz – 10 kHz |
| Transformation Ratio | 0.5 (typical) |
| Operating Temperature | -55°C to +125°C |
| Country of Origin | United States |
| Inventory Status | Limited stock – subject to availability; confirm at time of RFQ |
| Lead Time | 3–10 business days (stock-dependent); 8–14 weeks for factory-fresh orders where applicable |
| Minimum Order Quantity | 1 piece |
| Condition | New / Surplus New / Refurbished (specified per order confirmation) |
Note: The 21BRX700-D42AA is a mature-lifecycle part. Procurement teams should evaluate safety stock levels proactively rather than sourcing reactively. Spot availability fluctuates significantly quarter-to-quarter.
Procurement decisions on precision motion feedback components like the 21BRX700-D42AA should never be evaluated on unit price alone. The true cost of a wrong sourcing decision includes unplanned downtime, re-commissioning labor, and the cascading schedule impact on production output.
Spare Parts Turnover Rate: For facilities running HAROWE resolver-equipped servo systems, a turnover cycle of 12–18 months per critical spare is considered industry-standard. Holding one or two units of the 21BRX700-D42AA as a buffer stock typically costs less than 4 hours of unplanned downtime on a mid-capacity CNC line.
Total Cost of Ownership (TCO) Breakdown:
Choosing DriveKNMS as your sourcing partner for the 21BRX700-D42AA is not a transactional decision — it is a supply chain risk mitigation strategy.
Every 21BRX700-D42AA shipped by DriveKNMS is subject to the following quality and compliance protocols:
Sourcing a legacy resolver like the 21BRX700-D42AA from an unknown broker is a compliance and financial risk. Here is what differentiates DriveKNMS:
Q: What payment terms are available for first-time buyers?
A: First orders are typically processed on a 100% prepayment basis via T/T or PayPal. After two completed transactions, net-30 terms can be discussed for qualified corporate accounts.
Q: What is your warranty policy if the unit fails on arrival?
A: DOA (Dead on Arrival) units are replaced or refunded within 10 business days. We require photographic evidence and, where applicable, a brief functional test report. Return shipping is covered by DriveKNMS for confirmed DOA cases.
Q: Can I get a volume discount for 5+ units?
A: Yes. Volume pricing tiers are available for orders of 3, 5, and 10+ units. Contact us with your target quantity and delivery schedule for a tailored quote.
Q: Is the 21BRX700-D42AA still in production?
A: The HAROWE 21BRX series is a mature-lifecycle product line. New production availability is limited and subject to minimum order quantities from the OEM. DriveKNMS sources from authorized surplus and distributor channels to fulfill single-unit and small-batch requirements.
Q: What if I ordered the wrong part?
A: Unused, unopened units in original packaging may be returned within 14 days for a refund or exchange, subject to a restocking fee. Our technical team can also assist with cross-reference and substitution analysis before you order to minimize this risk.